/* ── Perl Community Ads ─────────────────────────────────────────────── */
#perl-ad-target {
    margin-top: var(--nav-h, 64px);
}
#perl-ad {
    background: rgba(34, 211, 238, 0.06);
    border-bottom: 1px solid rgba(34, 211, 238, 0.2);
    padding: 8px 24px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
#perl-ad-title {
    font-weight: 700;
    color: var(--text);
}
#perl-ad-desc {
    color: var(--muted2);
}
#perl-ad-link,
#perl-ad-link a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
    border-radius: 4px;
    padding: 2px 10px;
    transition: background .15s, border-color .15s;
    white-space: nowrap;
}
#perl-ad-link {
    border: 1px solid rgba(34,211,238,0.3);
}
#perl-ad-link a {
    border: none;
}
#perl-ad-link:hover,
#perl-ad-link a:hover {
    background: rgba(34,211,238,0.1);
    border-color: var(--accent);
    text-decoration: none;
}
/* Also fix the wrapping p tag margin */
#perl-ad p { margin: 0; }
/* ═══════════════════════════════════════════════════════════════════════
   TWC Dark Theme  —  theweeklychallenge.org
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────────────────── */
:root {
    --bg:        #0b0e14;
    --surface:   #131720;
    --surface2:  #1a2030;
    --border:    #252d3e;
    --border2:   #2e3a52;
    --text:      #e2e8f0;
    --muted:     #64748b;
    --muted2:    #94a3b8;
    --accent:    #22d3ee;
    --accent2:   #3b82f6;
    --accent3:   #f97316;
    --success:   #10b981;
    --warn:      #f59e0b;
    --danger:    #ef4444;
    --font-head: 'Outfit', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --font-body: 'Inter', sans-serif;
    --radius:    8px;
    --nav-h:     64px;
}

/* ── Light mode overrides ───────────────────────────────────────────── */
body.light-mode {
    --bg:       #f0f4f8;
    --surface:  #ffffff;
    --surface2: #e8edf3;
    --border:   #cbd5e1;
    --border2:  #94a3b8;
    --text:     #0f172a;
    --muted:    #475569;
    --muted2:   #334155;
    --accent:   #0891b2;
    --accent2:  #2563eb;
    --accent3:  #ea580c;
}
body.light-mode .twc-nav {
    background: rgba(240,244,248,.92);
}
body.light-mode .hero-overlay {
    background: linear-gradient(to right, rgba(240,244,248,.95) 0%, rgba(240,244,248,.6) 40%, rgba(240,244,248,0) 65%);
}
body.light-mode .hero-brand-img img {
    box-shadow: 0 8px 32px rgba(0,0,0,.2);
    border: 1px solid rgba(0,0,0,.1);
}
body.light-mode .task-card {
    background: #ffffff;
    border-color: var(--border);
}
body.light-mode .post-card {
    background: #ffffff;
}
body.light-mode code {
    background: #e2e8f0;
    color: #0f172a;
}
body.light-mode pre {
    background: #1e2433 !important;
    border-color: #374151;
}
body.light-mode pre code {
    background: transparent;
    color: #e2e8f0 !important;
}
body.light-mode .hero-heading {
    color: #0f172a;
}

/* ── Theme toggle button ────────────────────────────────────────────── */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--muted);
    cursor: pointer;
    font-size: 15px;
    transition: color .2s, border-color .2s, background .2s;
    flex-shrink: 0;
}
.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.08);
}

/* ── Reset ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--text); }

img { max-width: 100%; display: block; }

/* ══════════════════════════════════════════════════════════════════════
   NAVIGATION
══════════════════════════════════════════════════════════════════════ */
.twc-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(11,14,20,.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: background .3s;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-logo img {
    height: 40px;
    background: #ffffff;
    border-radius: 50%;
    padding: 4px;
    box-shadow: 0 0 0 1px rgba(255,255,255,.15);
}
.nav-logo-text {
    font-family: var(--font-head);
    font-size: 20px;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: .05em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
    flex: 1;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 5px 8px;
    border-radius: 5px;
    transition: color .2s, background .2s;
}
.nav-link:hover, .nav-link.active {
    color: var(--text);
    background: var(--surface2);
}
.nav-link.active { color: var(--accent); }

/* ── Dropdown ── */
.nav-dropdown { position: relative; }
.drop-arrow {
    font-size: 7px;
    vertical-align: middle;
    margin-left: 3px;
    opacity: .6;
    transition: transform .2s;
    display: inline-block;
}
.nav-dropdown.open .drop-arrow { transform: rotate(180deg); }

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px;
    min-width: 160px;
    list-style: none;
    z-index: 200;
    box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu li a {
    display: block;
    padding: 7px 12px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    border-radius: 5px;
    transition: color .15s, background .15s;
    white-space: nowrap;
}
.nav-dropdown-menu li a:hover {
    color: var(--accent);
    background: var(--surface2);
}

/* Mobile: dropdowns expand inline */
@media (max-width: 768px) {
    .nav-dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: var(--surface2);
        border-radius: 6px;
        margin: 4px 0;
        padding: 4px 8px;
        display: none;
    }
    .nav-dropdown.open .nav-dropdown-menu { display: block; }
    .nav-drop-toggle { width: 100%; }
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}
.nav-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s;
}

/* ══════════════════════════════════════════════════════════════════════
   MAIN CONTENT
══════════════════════════════════════════════════════════════════════ */
.main-content { padding-top: 0; min-height: 100vh; }

/* ══════════════════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════════════════ */
.hero {
    position: relative;
    min-height: auto;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-bg-img {
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: .12;
    filter: grayscale(60%) blur(2px);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(11,14,20,.97) 0%, rgba(11,14,20,.7) 50%, rgba(11,14,20,.1) 100%);
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: .25;
    mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,.5) 20%, rgba(0,0,0,.5) 80%, transparent);
}

.hero-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Heading + brand image in one row */
.hero-title-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 32px;
    margin-bottom: 24px;
    width: 100%;
}
.hero-heading-wrap {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    align-items: center;
}
.hero-title-row .hero-heading {
    margin-bottom: 0 !important;
    flex: unset;
    min-width: 0;
    font-size: clamp(32px, 5vw, 64px) !important;
}
.hero-brand-img {
    flex: 0 0 280px;
    width: 280px;
    position: relative;
    z-index: 2;
    padding-right: 24px;
}
.hero-brand-img img {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,.6);
    border: 1px solid rgba(255,255,255,.12);
    display: block;
}
@media (max-width: 700px) {
    .hero-brand-img { display: none; }
    .hero-title-row { display: block; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 32px 32px;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34,211,238,.1);
    border: 1px solid rgba(34,211,238,.3);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: 5px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
}
.badge-dot {
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%,100% { opacity: 1; transform: scale(1); }
    50%      { opacity: .4; transform: scale(.8); }
}

.hero-heading {
    font-family: var(--font-head);
    font-size: clamp(42px, 7vw, 80px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -.02em;
    color: var(--text);
    margin-bottom: 12px;
}
.hero-flip-wrap { display: inline-block; position: relative; }
.hero-flip {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-quote {
    font-family: var(--font-head);
    font-size: clamp(13px, 1.6vw, 20px);
    font-weight: 700;
    font-style: normal;
    letter-spacing: -0.01em;
    line-height: 1.3;
    margin-bottom: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0 10px;
    justify-content: center;
    align-items: baseline;
}
.hero-quote::before {
    content: '“';
    font-size: clamp(40px, 5vw, 64px);
    color: var(--accent);
    font-family: var(--font-head);
    line-height: 0.8;
    opacity: 0.7;
    margin-right: 2px;
}
.hero-quote::after {
    content: '”';
    font-size: clamp(40px, 5vw, 64px);
    color: var(--accent2);
    font-family: var(--font-head);
    line-height: 0.8;
    opacity: 0.7;
    margin-left: 2px;
}

/* Each word/group gets its own colour */
.tq-you    { color: var(--muted2); }
.tq-dont   {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.tq-have   { color: var(--text); }
.tq-be     { color: var(--muted2); }
.tq-expert {
    background: linear-gradient(90deg, var(--accent2), #f43f5e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-style: italic;
}

.hero-tasks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.task-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: border-color .2s;
}
.task-card:hover { border-color: var(--accent); }

.task-num {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent);
    display: block;
    margin-bottom: 6px;
}
.task-label {
    display: block;
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}
.task-desc {
    font-size: 13px;
    color: var(--muted2);
    line-height: 1.6;
    text-align: justify;
    hyphens: auto;
}

.hero-ctas {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 28px;
    justify-content: center;
}

.hero-quicklinks {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}
.quicklink {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 5px 12px;
    border-radius: 5px;
    transition: color .2s, border-color .2s, background .2s;
}
.quicklink:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.06);
}

/* ── Buttons ── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34,211,238,.12);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 11px 24px;
    border-radius: 6px;
    border: 1px solid rgba(34,211,238,.5);
    transition: background .2s, transform .2s, box-shadow .2s, border-color .2s;
    cursor: pointer;
}
.btn-primary:hover {
    background: rgba(34,211,238,.22);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(34,211,238,.2);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 10px 22px;
    border-radius: 6px;
    border: 1px solid rgba(148,163,184,.35);
    color: var(--muted2);
    background: rgba(148,163,184,.06);
    transition: border-color .2s, color .2s, background .2s;
}
.btn-ghost:hover {
    border-color: rgba(148,163,184,.7);
    color: var(--text);
    background: rgba(148,163,184,.12);
}

/* ══════════════════════════════════════════════════════════════════════
   SECTION WRAPPER
══════════════════════════════════════════════════════════════════════ */
.section {
    padding: 80px 0;
}
.section-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}
.section-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 10px;
}
.section-title {
    font-family: var(--font-head);
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.01em;
    margin-bottom: 40px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--border);
    position: relative;
}
.section-title::after {
    content: '';
    position: absolute;
    left: 0; bottom: -2px;
    width: 60px; height: 2px;
    background: var(--accent);
}

/* ══════════════════════════════════════════════════════════════════════
   ABOUT
══════════════════════════════════════════════════════════════════════ */
.about-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.about-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 48px;
    align-items: start;
}

.about-img-wrap {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    aspect-ratio: 1;
}
.about-img-wrap img { width:100%; height:100%; object-fit:cover; }

.about-social {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

.social-btn {
    width: 38px; height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--muted);
    font-size: 16px;
    transition: color .2s, border-color .2s, background .2s;
}
.social-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.08);
}
.social-btn-web {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.08);
}
.social-btn-web:hover {
    background: rgba(34,211,238,.2);
}

.about-chapter { margin-bottom: 32px; }
.chapter-title {
    font-family: var(--font-head);
    font-size: 16px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 10px;
    letter-spacing: .01em;
}
.chapter-body {
    font-size: 14px;
    color: var(--muted2);
    line-height: 1.8;
    text-align: justify;
    hyphens: auto;
}

/* ══════════════════════════════════════════════════════════════════════
   BOOK BANNER
══════════════════════════════════════════════════════════════════════ */
.book-banner {
    padding: 32px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.book-banner-inner {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 28px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 14px;
    padding: 20px 28px;
    transition: border-color .2s, box-shadow .2s;
}
.book-banner-inner:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(34,211,238,.08);
}
.book-cover {
    width: 80px;
    flex-shrink: 0;
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
    display: block;
}
.book-eyebrow {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
    display: block;
    margin-bottom: 6px;
}
.book-title {
    font-family: var(--font-head);
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    line-height: 1.3;
}
.book-desc {
    font-size: 13px;
    color: var(--muted2);
    line-height: 1.6;
    margin-bottom: 12px;
}
.book-btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 5px;
    padding: 6px 14px;
    transition: background .2s, color .2s;
}
.book-btn:hover {
    background: var(--accent);
    color: #0b0e14;
}
@media (max-width: 600px) {
    .book-banner-inner { flex-direction: column; text-align: center; }
    .book-cover { width: 100px; }
}

/* ══════════════════════════════════════════════════════════════════════
   CTA SECTION
══════════════════════════════════════════════════════════════════════ */
.cta-section {
    padding: 36px 32px;
    text-align: center;
    background: linear-gradient(135deg, rgba(34,211,238,.06), rgba(59,130,246,.04));
    border-top: 1px solid var(--border);
}
.cta-inner { max-width: 600px; margin: 0 auto; }
.cta-title {
    font-family: var(--font-head);
    font-size: 32px;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
}
.cta-body { color: var(--muted2); margin-bottom: 28px; }

/* ══════════════════════════════════════════════════════════════════════
   PAGE HERO (inner pages)
══════════════════════════════════════════════════════════════════════ */
.page-hero {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 60px 32px 40px;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: .15;
}
.page-hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}
.page-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 8px;
}
.page-title {
    font-family: var(--font-head);
    font-size: clamp(28px, 5vw, 52px);
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.02em;
    margin-bottom: 8px;
}
.page-desc { color: var(--muted2); font-size: 15px; margin-bottom: 16px; }

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.bc-sep { color: var(--border2); }

/* ══════════════════════════════════════════════════════════════════════
   CONTENT WRAP (inner pages)
══════════════════════════════════════════════════════════════════════ */
.content-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 32px 80px;
}

/* ── Prose typography ── */
.prose h1,.prose h2,.prose h3,.prose h4,.prose h5 {
    font-family: var(--font-head);
    font-weight: 700;
    color: var(--text);
    margin: 1.5em 0 .5em;
    letter-spacing: -.01em;
}
.prose h1 { margin-top: .8em; }
.prose h2 { font-size: 24px; border-bottom: 1px solid var(--border); padding-bottom: 8px; margin-bottom: .2em; margin-top: .4em !important; }
.prose h2 + p, .prose h2 + hr + p, .prose h2 + hr { margin-top: 0; }
.prose h5 { font-size: 14px; margin: .1em 0 .2em; font-weight: 600; }
.prose h2 + h5 { margin-top: .1em; }
.prose h3 { font-size: 19px; color: var(--accent); }
.prose h4 { font-size: 15px; margin: .3em 0 .1em; }
.prose p  { color: var(--muted2); margin-bottom: 1em; line-height: 1.8; text-align: justify; hyphens: auto; }
.champion-card p { text-align: center !important; hyphens: none !important; }
.prose a  { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--text); }
.prose ul,.prose ol { padding-left: 1.5em; color: var(--muted2); margin-bottom: 1em; }
.prose li { margin-bottom: .1em; }
.prose ul li p, .prose ol li p { margin-top: 0; margin-bottom: 0; }

/* ── Bootstrap grid shim (for blog post content using container/row/col) ── */
.container-fluid { width:100%; padding: 0 15px; }
.row { display:flex; flex-wrap:wrap; margin: 0 -8px; }
.row.justify-content-center { justify-content: center; }
.row.text-center { text-align: center; }
[class*="col-"] { padding: 0 8px; box-sizing: border-box; }
.col-1  { flex: 0 0 8.333%;  max-width: 8.333%;  }
.col-2  { flex: 0 0 16.666%; max-width: 16.666%; }
.col-3  { flex: 0 0 25%;     max-width: 25%;      }
.col-4  { flex: 0 0 33.333%; max-width: 33.333%;  }
.col-6  { flex: 0 0 50%;     max-width: 50%;      }
.col-12 { flex: 0 0 100%;    max-width: 100%;     }
@media (min-width:576px)  { .col-sm-1 { flex:0 0 8.333%;  max-width:8.333%;  } }
@media (min-width:768px)  { .col-md-1 { flex:0 0 8.333%;  max-width:8.333%;  } }
@media (min-width:992px)  { .col-lg-1 { flex:0 0 8.333%;  max-width:8.333%;  } }
@media (min-width:1200px) { .col-xl-1 { flex:0 0 8.333%;  max-width:8.333%;  } }
.mb-2 { margin-bottom: 0.5rem; }
.py-3 { padding-top: 1rem; padding-bottom: 1rem; }

/* Week link items — hide original Bootstrap markup, replaced by JS grid */
.links-visible,
.links-hidden { display: none !important; }

/* JS-built week grid */
.guest-week-grid {
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    gap: 5px;
    margin-bottom: 16px;
}
.guest-week-grid a {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 6px;
    padding: 5px 2px;
    transition: background .2s, border-color .2s, color .2s;
    text-decoration: none !important;
}
.guest-week-grid a:hover {
    background: rgba(34,211,238,.12);
    border-color: var(--accent);
    color: var(--text);
}
.guest-week-wrap {
    margin: 20px 0;
}
.guest-show-more {
    display: inline-block;
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 20px;
    padding: 6px 16px;
    cursor: pointer;
    background: none;
    transition: background .2s, color .2s;
}
.guest-show-more:hover {
    background: var(--accent);
    color: #0b0e14;
}
/* Hide the markdown show-more buttons only on the guest-contributions section page */
.gc-week-nav #gc-show-more,
.gc-week-nav #gc-show-less {
    display: none !important;
}
@media (max-width: 600px) {
    .guest-week-grid { grid-template-columns: repeat(8, 1fr); }
}
.prose code {
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--surface2);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--accent3);
}
.prose pre {
    background: #1e2433;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    overflow-x: auto;
    margin-bottom: 1.5em;
}
.prose pre code { background: none; border: none; padding: 0; color: #e8eaf0; font-size: 14px; }
.prose blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    color: var(--muted2);
    font-style: italic;
    margin: 1.5em 0;
}
.prose table { width:100%; border-collapse:collapse; margin-bottom:1.5em; }
.prose th { background:var(--surface2); color:var(--text); font-family:var(--font-mono); font-size:11px; text-transform:uppercase; padding:10px 14px; border:1px solid var(--border); }
.prose td { padding:10px 14px; border:1px solid var(--border); color:var(--muted2); font-size:14px; }
.prose tr:hover td { background:var(--surface); }
.prose img { border-radius:var(--radius); margin:1.5em 0; }
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 5px;
    padding: 6px 14px;
    margin-bottom: 1.5rem;
    transition: color .2s, border-color .2s, background .2s;
}
.back-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.08);
    text-decoration: none;
}

.post-hero-img {
    width: 60%;
    margin: 0 auto 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}
.post-hero-img img {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    object-fit: contain;
}
.prose strong { color:var(--text); font-weight:600; }

/* ══════════════════════════════════════════════════════════════════════
   POST GRID (list pages)
══════════════════════════════════════════════════════════════════════ */
.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 32px;
}
.post-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color .2s, transform .2s;
}
.post-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.post-card-img img { width:100%; height:180px; object-fit:cover; }
.post-card-body { padding: 20px; }
.post-tags { display:flex; gap:6px; flex-wrap:wrap; margin-bottom:10px; }
.tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .08em;
    text-transform: uppercase;
    background: rgba(34,211,238,.1);
    color: var(--accent);
    border: 1px solid rgba(34,211,238,.2);
    padding: 2px 8px;
    border-radius: 4px;
}
.post-card-title { font-family:var(--font-head); font-size:17px; font-weight:700; margin-bottom:8px; }
.post-card-title a { color:var(--text); }
.post-card-title a:hover { color:var(--accent); }
.post-meta { font-family:var(--font-mono); font-size:11px; color:var(--muted); display:flex; gap:12px; margin-bottom:10px; }
.post-card-desc { font-size:13px; color:var(--muted2); line-height:1.6; margin-bottom:14px; }
.post-read-more { font-family:var(--font-mono); font-size:11px; color:var(--accent); text-transform:uppercase; letter-spacing:.08em; }
.post-read-more:hover { color:var(--text); }

/* ══════════════════════════════════════════════════════════════════════
   CHART PAGE
══════════════════════════════════════════════════════════════════════ */
.chart-page { padding-top: 32px; }

/* Sticky TOC */
.chart-toc {
    position: sticky;
    top: calc(var(--nav-h) + 8px);
    z-index: 100;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 20px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.toc-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    white-space: nowrap;
}
.toc-links { display:flex; gap:6px; flex-wrap:wrap; }
.toc-link {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    padding: 4px 12px;
    border-radius: 5px;
    border: 1px solid transparent;
    transition: color .2s, border-color .2s, background .2s;
}
.toc-link:hover { color:var(--text); background:var(--surface2); }
.toc-link.active { color:var(--accent); border-color:rgba(34,211,238,.3); background:rgba(34,211,238,.06); }

/* Chart sections */
.chart-section { margin-bottom: 64px; }
.chart-section-header { margin-bottom: 16px; }
.chart-section-title {
    font-family: var(--font-head);
    font-size: 28px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -.01em;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    position: relative;
}
.chart-section-title::after {
    content:'';
    position:absolute;
    left:0; bottom:-1px;
    width:48px; height:2px;
    background: var(--accent);
}

/* Chart tabs */
.chart-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.chart-tab {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 5px 14px;
    border-radius: 5px;
    cursor: pointer;
    transition: color .2s, border-color .2s, background .2s;
}
.chart-tab:hover { color:var(--text); background:var(--surface2); }
.chart-tab.active { color:var(--accent); border-color:rgba(34,211,238,.4); background:rgba(34,211,238,.08); }

/* Chart card */
.chart-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.chart-card-title {
    font-family: var(--font-head);
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.chart-card-subtitle {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 20px;
}
.chart-wrap { position:relative; min-height: 400px; height: 420px; }
.chart-wrap canvas { position:absolute; inset:0; width:100% !important; height:100% !important; }

/* Week-number tab rows scroll horizontally instead of wrapping */
/* Visible week tab rows: CSS grid, fixed 20 columns per row */
#challenges-tabs, #guests-tabs {
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    gap: 5px;
    overflow: visible;
}
#challenges-tabs .chart-tab, #guests-tabs .chart-tab {
    text-align: center;
    padding: 4px 0;
    font-size: 10px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
/* Older weeks: flex wrap with same compact sizing */
#challenges-tabs-old, #guests-tabs-old {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}
#challenges-tabs-old .chart-tab, #guests-tabs-old .chart-tab {
    flex: 0 0 58px;
    text-align: center;
    padding: 4px 0;
    font-size: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Spinner */
.chart-spinner {
    display: none;
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
}
.chart-spinner::before {
    content: '';
    width: 24px; height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    margin-right: 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Drilldown breadcrumb */
.dd-breadcrumb { margin-bottom: 12px; }

/* ══════════════════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════════════════ */
.twc-footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 48px 32px 0;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: start;
    gap: 48px;
    align-items: start;
    padding-bottom: 40px;
}
.footer-brand {
    width: fit-content;
}
.footer-title {
    font-family: var(--font-head);
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    display: block;
    margin-bottom: 0;
    white-space: nowrap;
}
.footer-tagline {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0 5px;
    font-family: var(--font-head);
    font-size: 12px;
    font-weight: 700;
    margin: 2px 0 0 0;
    padding: 0;
    align-items: baseline;
}
.footer-tagline::before,
.footer-tagline::after {
    content: none;
}
.footer-title span {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 32px;
}
.footer-link-group-title {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-top: 12px;
    margin-bottom: 2px;
    grid-column: 1 / -1;
}
.footer-link {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    transition: color .2s;
}
.footer-link:hover { color: var(--accent); }
.footer-social { display:flex; gap:10px; align-items:flex-start; }

.footer-nav-groups {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}
.footer-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 90px;
}
.footer-group-title {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 4px;
}
.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 0;
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
}

/* ══════════════════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
    .hero-tasks { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .about-image-col { display:flex; align-items:center; gap:20px; }
    .about-img-wrap { width:100px; height:100px; flex-shrink:0; }
    .footer-inner { grid-template-columns:1fr; gap:24px; }
    .footer-links { flex-direction:row; flex-wrap:wrap; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: var(--nav-h); left:0; right:0;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
    }
    .nav-menu.open { display: flex; }
    .nav-toggle { display: flex; }
    .nav-link { width:100%; padding:10px 14px; }
    .hero-content { padding: 48px 20px 40px; }
    .page-hero { padding: 40px 20px 28px; }
    .content-wrap { padding: 32px 20px 60px; }
    .section-inner { padding: 0 20px; }
    .chart-toc { top: calc(var(--nav-h) + 4px); }
}

@media (max-width: 480px) {
    .hero-ctas { flex-direction: column; }
    .post-grid { grid-template-columns: 1fr; }

    /* Week tabs: fewer columns on small screens */
    #challenges-tabs, #guests-tabs {
        grid-template-columns: repeat(8, 1fr);
    }
    #challenges-tabs-old, #guests-tabs-old {
        gap: 4px;
    }
    #challenges-tabs-old .chart-tab,
    #guests-tabs-old .chart-tab {
        flex: 0 0 44px;
        font-size: 9px;
    }

    /* Hero title row: stack on very small screens */
    .hero-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .hero-brand-img {
        display: none;
    }

    /* About section: full stack */
    .about-image-col {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .about-img-wrap { width: 120px; height: 120px; }

    /* Bootstrap col-1 shim: more columns on mobile */
    .col-1, .col-sm-1, .col-md-1, .col-lg-1, .col-xl-1 {
        flex: 0 0 16.666%;
        max-width: 16.666%;
    }

    /* Post hero image full width on mobile */
    .post-hero-img { width: 100%; }
}

@media (max-width: 360px) {
    #challenges-tabs, #guests-tabs {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* ══════════════════════════════════════════════════════════════════════
   GUEST CONTRIBUTIONS
══════════════════════════════════════════════════════════════════════ */

/* Year tabs */
.gc-year-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.gc-year-tab {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    color: var(--muted2);
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 6px;
    padding: 6px 18px;
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
}
.gc-year-tab:hover {
    color: var(--accent);
    border-color: var(--accent);
}
.gc-year-tab.active {
    color: #0b0e14;
    background: var(--accent);
    border-color: var(--accent);
}

/* Year grids and sections — hidden unless active */
.gc-year-grid,
.gc-year-section {
    display: none;
}
.gc-year-grid.active {
    display: block;
    margin-bottom: 20px;
}
.gc-year-section.active {
    display: block;
}

.gc-intro {
    font-size: 15px;
    color: var(--muted2);
    line-height: 1.8;
    margin-bottom: 28px;
    text-align: justify;
    hyphens: auto;
}
.gc-week-nav {
    margin-bottom: 28px;
}
.gc-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 32px 0;
}
.gc-week {
    margin-bottom: 40px;
    scroll-margin-top: calc(var(--nav-h) + 16px);
}
.gc-week-title {
    font-family: var(--font-head);
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
    margin-bottom: 12px;
}
.gc-week-title a {
    color: var(--accent);
    text-decoration: none;
}
.gc-week-title a:hover { color: var(--text); }

.gc-entries {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.gc-entry {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    padding: 5px 10px;
    border-radius: 6px;
    transition: background .15s;
}
.gc-entry:hover { background: var(--surface2); }
.gc-name {
    font-weight: 600;
    color: var(--text);
    min-width: 180px;
}
.gc-lang {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 4px;
    padding: 2px 8px;
    min-width: 80px;
    text-align: center;
}
.gc-tasks {
    justify-content: center;
    display: flex;
    gap: 8px;
}
.gc-tasks a {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .04em;
    color: var(--muted2);
    border: 1px solid var(--border2);
    border-radius: 4px;
    padding: 2px 8px;
    text-decoration: none !important;
    transition: color .15s, border-color .15s, background .15s;
}
.gc-tasks a:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34,211,238,.06);
}
@media (max-width: 600px) {
    .gc-entry { flex-wrap: wrap; }
    .gc-name  { min-width: 100%; }
}

/* ── Chart count label ── */
.chart-count-label {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--muted2);
    padding: 8px 0 4px;
    letter-spacing: 0.05em;
}

/* ── Blog post Table of Contents ── */
/* TOC is rendered as h3 tags in markdown — wrap them in a flex pill row */
/* Wrap all TOC h3s in a flex row — handled by JS, only style the pill rows here */
.prose h2#table-of-contents {
    display: none !important;
}
.prose h2#table-of-contents + hr {
    display: none;
}

/* ── Sponsor button ── */
.btn-sponsor {
    border-color: rgba(251,191,36,.4) !important;
    color: #fbbf24 !important;
}
.btn-sponsor:hover {
    background: rgba(251,191,36,.1) !important;
    border-color: #fbbf24 !important;
}

/* ── TOC pill rows ── */
.toc-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 6px;
}
.toc-row-main  { justify-content: center; }
.toc-row-tasks { justify-content: center; margin-top: 2px; }
.toc-pill-row a {
    font-family: var(--font-mono);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    padding: 6px 16px;
    border-radius: 20px;
    background: linear-gradient(145deg, rgba(34,211,238,.15), rgba(34,211,238,.05));
    border: 1px solid rgba(34,211,238,.35);
    box-shadow: 0 2px 6px rgba(0,0,0,.4), inset 0 1px 0 rgba(34,211,238,.15);
    color: var(--accent);
    text-decoration: none;
    white-space: nowrap;
    transition: box-shadow .15s, background .15s, transform .15s;
}
.toc-pill-row a:hover {
    background: linear-gradient(145deg, rgba(34,211,238,.25), rgba(34,211,238,.1));
    box-shadow: 0 4px 12px rgba(34,211,238,.2), inset 0 1px 0 rgba(34,211,238,.2);
    transform: translateY(-1px);
    text-decoration: none;
}

/* ── Post tags ── */
.post-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.post-tags-label {
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-right: 4px;
}
.post-tag {
    font-family: var(--font-mono);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(34,211,238,.08);
    border: 1px solid rgba(34,211,238,.2);
    color: var(--accent);
    text-decoration: none;
    transition: background .15s, border-color .15s;
}
.post-tag:hover {
    background: rgba(34,211,238,.18);
    border-color: var(--accent);
    text-decoration: none;
}


/* ══════════════════════════════════════════════════════════════════════
   SEARCH PAGE
══════════════════════════════════════════════════════════════════════ */
.search-wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 60px 24px 160px;
}

/* ── Input group ── */
.search-box-wrap {
    margin-bottom: 40px;
}
.search-input-group {
    position: relative;
    display: flex;
    align-items: center;
}
.search-input-icon {
    position: absolute;
    left: 16px;
    color: var(--muted);
    pointer-events: none;
    flex-shrink: 0;
}
.search-input {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: 10px;
    padding: 14px 48px 14px 48px;
    font-family: var(--font-head);
    font-size: 1.05rem;
    color: var(--text);
    outline: none;
    transition: border-color .2s, box-shadow .2s;
    -webkit-appearance: none;
}
.search-input::placeholder { color: var(--muted); }
.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(34,211,238,.12);
}
/* hide browser's native clear button */
.search-input::-webkit-search-cancel-button { display: none; }

.search-clear {
    position: absolute;
    right: 14px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--muted);
    padding: 4px;
    display: flex;
    align-items: center;
    border-radius: 4px;
    transition: color .15s;
}
.search-clear:hover { color: var(--text); }

.search-status {
    margin: 10px 0 0;
    font-family: var(--font-mono);
    font-size: .72rem;
    letter-spacing: .06em;
    color: var(--muted);
    min-height: 1.4em;
}

/* ── Result items ── */
.search-results {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.search-result-item {
    display: block;
    padding: 18px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color .15s, background .15s, transform .15s;
}
.search-result-item:hover {
    border-color: var(--accent);
    background: var(--surface2);
    transform: translateX(3px);
    text-decoration: none;
}
.search-result-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}
.search-result-section {
    font-family: var(--font-mono);
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface2);
    border: 1px solid var(--border2);
    padding: 2px 8px;
    border-radius: 4px;
}
.search-result-tag {
    font-family: var(--font-mono);
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(34,211,238,.08);
    border: 1px solid rgba(34,211,238,.2);
    padding: 2px 8px;
    border-radius: 4px;
}
.search-result-title {
    font-family: var(--font-head);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 6px;
}
.search-result-snippet {
    font-size: .85rem;
    color: var(--muted2);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.search-result-item mark,
.search-result-snippet mark {
    background: rgba(34,211,238,.2);
    color: var(--accent);
    border-radius: 2px;
    padding: 0 1px;
}

/* ── Empty state ── */
.search-empty {
    text-align: center;
    padding: 60px 24px;
    color: var(--muted);
}
.search-empty svg {
    margin-bottom: 16px;
    opacity: .4;
}
.search-empty p {
    margin: 0 0 8px;
    font-size: .95rem;
    color: var(--muted2);
}
.search-empty strong { color: var(--text); }
.search-empty-hint {
    font-size: .85rem !important;
    color: var(--muted) !important;
}


/* ══════════════════════════════════════════════════════════════════════
   PREV / NEXT POST NAVIGATION
══════════════════════════════════════════════════════════════════════ */
.post-nav {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}
.post-nav-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.post-nav-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color .15s, background .15s, transform .15s;
}
.post-nav-item:hover {
    border-color: var(--accent);
    background: var(--surface2);
    text-decoration: none;
}
.post-nav-prev:hover { transform: translateX(-3px); }
.post-nav-next:hover { transform: translateX(3px); }
.post-nav-empty {
    background: none;
    border-color: transparent;
    pointer-events: none;
}
.post-nav-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent);
}
.post-nav-next .post-nav-label {
    justify-content: flex-end;
}
.post-nav-title {
    font-family: var(--font-head);
    font-size: .9rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-nav-next .post-nav-title {
    text-align: right;
}

@media (max-width: 600px) {
    .post-nav-inner {
        grid-template-columns: 1fr;
    }
    .post-nav-next .post-nav-label { justify-content: flex-start; }
    .post-nav-next .post-nav-title { text-align: left; }
}


/* ══════════════════════════════════════════════════════════════════════
   COPY CODE BUTTON
══════════════════════════════════════════════════════════════════════ */
.prose pre {
    position: relative;
}
.copy-code-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 6px;
    color: var(--muted2);
    cursor: pointer;
    opacity: 0.4;
    transition: opacity .15s, background .15s, color .15s, border-color .15s;
    padding: 0;
}
.prose pre:hover .copy-code-btn {
    opacity: 1;
}
.copy-code-btn:hover {
    background: rgba(34,211,238,.12);
    border-color: rgba(34,211,238,.3);
    color: var(--accent);
}
.copy-code-btn.copied {
    background: rgba(34,211,238,.15);
    border-color: var(--accent);
    color: var(--accent);
    opacity: 1;
}


/* ══════════════════════════════════════════════════════════════════════
   READING TIME
══════════════════════════════════════════════════════════════════════ */
.reading-time {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
}
.reading-time svg {
    flex-shrink: 0;
    opacity: .7;
}


/* ══════════════════════════════════════════════════════════════════════
   READING PROGRESS BAR
══════════════════════════════════════════════════════════════════════ */
#reading-progress-wrap {
    position: fixed;
    top: var(--nav-h, 64px);
    left: 0;
    right: 0;
    height: 3px;
    z-index: 999;
    background: transparent;
}
#reading-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transition: width .1s linear;
    box-shadow: 0 0 8px rgba(34,211,238,.5);
}

/* ══════════════════════════════════════════════════════════════════════
   POST META (published / updated dates)
══════════════════════════════════════════════════════════════════════ */
.post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
}
.post-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .06em;
    color: var(--muted);
}
.post-meta-updated {
    color: var(--accent);
    opacity: .8;
}
.post-meta-sep {
    color: var(--border2);
    font-size: .8rem;
}


/* ── Nav keyboard shortcut badge ── */
.nav-kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: .6rem;
    font-weight: 700;
    line-height: 1;
    padding: 2px 5px;
    margin-left: 4px;
    border: 1px solid var(--border2);
    border-radius: 4px;
    color: var(--muted);
    background: var(--surface2);
    vertical-align: middle;
    transition: border-color .15s, color .15s;
}
.nav-search-link:hover .nav-kbd {
    border-color: var(--accent);
    color: var(--accent);
}


/* ══════════════════════════════════════════════════════════════════════
   CODE BLOCK LANGUAGE LABEL
══════════════════════════════════════════════════════════════════════ */
.prose pre {
    padding-top: 40px; /* make room for label + copy btn */
}
.code-lang-label {
    position: absolute;
    top: 10px;
    left: 14px;
    font-family: var(--font-mono);
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(34,211,238,.1);
    border: 1px solid rgba(34,211,238,.2);
    color: var(--accent);
    pointer-events: none;
    user-select: none;
    z-index: 1;
}

/* Language-specific colours */
.code-lang-label[data-lang="perl"],
.prose pre .code-lang-label:has(+ code[data-lang="perl"]) {
    background: rgba(99,102,241,.12);
    border-color: rgba(99,102,241,.3);
    color: #818cf8;
}
/* Simpler approach — colour by text content via JS class */
.code-lang-perl   { background: rgba(99,102,241,.12) !important; border-color: rgba(99,102,241,.3) !important; color: #818cf8 !important; }
.code-lang-raku   { background: rgba(249,115,22,.1)  !important; border-color: rgba(249,115,22,.3)  !important; color: #fb923c !important; }
.code-lang-python { background: rgba(234,179,8,.1)   !important; border-color: rgba(234,179,8,.3)   !important; color: #facc15 !important; }
.code-lang-bash, .code-lang-sh, .code-lang-shell {
    background: rgba(34,197,94,.1)  !important;
    border-color: rgba(34,197,94,.3) !important;
    color: #4ade80 !important;
}

/* ══════════════════════════════════════════════════════════════════════
   ANCHOR LINKS ON HEADINGS
══════════════════════════════════════════════════════════════════════ */
.prose h1, .prose h2, .prose h3, .prose h4 {
    position: relative;
}
.heading-anchor {
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
    opacity: 0;
    color: var(--muted);
    text-decoration: none;
    vertical-align: middle;
    transition: opacity .15s, color .15s;
}
.prose h1:hover .heading-anchor,
.prose h2:hover .heading-anchor,
.prose h3:hover .heading-anchor,
.prose h4:hover .heading-anchor {
    opacity: 1;
}
.heading-anchor:hover {
    color: var(--accent);
    text-decoration: none;
}


/* ══════════════════════════════════════════════════════════════════════
   EXTERNAL LINK INDICATOR
══════════════════════════════════════════════════════════════════════ */
.prose a .ext-icon {
    display: inline-block;
    vertical-align: middle;
    margin-left: 2px;
    margin-bottom: 2px;
    opacity: .5;
    transition: opacity .15s;
}
.prose a:hover .ext-icon {
    opacity: 1;
}


/* ══════════════════════════════════════════════════════════════════════
   RELATED POSTS
══════════════════════════════════════════════════════════════════════ */
.related-posts {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}
.related-posts-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 20px;
}
.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.related-post-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color .15s, background .15s, transform .15s;
}
.related-post-card:hover {
    border-color: var(--accent);
    background: var(--surface2);
    transform: translateY(-2px);
    text-decoration: none;
}
.related-post-section {
    font-family: var(--font-mono);
    font-size: .62rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
}
.related-post-title {
    font-family: var(--font-head);
    font-size: .88rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.related-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}
.related-post-tag {
    font-family: var(--font-mono);
    font-size: .6rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(34,211,238,.08);
    border: 1px solid rgba(34,211,238,.15);
    color: var(--accent);
}
.related-post-date {
    font-family: var(--font-mono);
    font-size: .65rem;
    color: var(--muted);
    margin-top: 2px;
}
@media (max-width: 700px) {
    .related-posts-grid {
        grid-template-columns: 1fr;
    }
}


/* ══════════════════════════════════════════════════════════════════════
   PRINT STYLESHEET
══════════════════════════════════════════════════════════════════════ */
@media print {

    /* ── Reset colours to black on white ── */
    *, *::before, *::after {
        background: #fff !important;
        color: #000 !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }

    /* ── Hide everything that isn't content ── */
    .twc-nav,
    .twc-footer,
    #perl-ad-target,
    #perl-ad,
    #back-to-top,
    #reading-progress-wrap,
    .back-btn,
    .post-nav,
    .related-posts,
    .post-tags,
    .copy-code-btn,
    .heading-anchor,
    .toc-pill-row,
    .search-wrap,
    .ext-icon,
    .reading-time {
        display: none !important;
    }

    /* ── Page setup ── */
    @page {
        margin: 1.8cm 2cm;
    }
    body {
        font-size: 11pt;
        line-height: 1.5;
    }

    /* ── Hero: show title cleanly ── */
    .page-hero {
        background: none !important;
        border: none !important;
        padding: 0 0 10pt !important;
        border-bottom: 1.5pt solid #000 !important;
        margin-bottom: 14pt;
    }
    .page-hero::before { display: none; }
    .page-title {
        font-size: 20pt !important;
        margin-bottom: 4pt !important;
        line-height: 1.2 !important;
    }
    .breadcrumb {
        font-size: 8pt;
        color: #666 !important;
        margin-bottom: 4pt;
    }
    .post-meta {
        font-size: 8pt;
        color: #666 !important;
        margin-top: 4pt;
    }

    /* ── Content ── */
    .content-wrap {
        padding: 0 !important;
        max-width: 100% !important;
    }
    .prose {
        font-size: 10pt;
        max-width: 100% !important;
    }
    .prose p { margin-bottom: 6pt; }
    .prose h1 { font-size: 16pt; margin: 12pt 0 4pt; }
    .prose h2 { font-size: 14pt; margin: 10pt 0 4pt; }
    .prose h3 { font-size: 12pt; margin: 8pt 0 3pt; }
    .prose h4 { font-size: 11pt; margin: 6pt 0 3pt; }

    /* ── Avoid page breaks inside key elements ── */
    .prose h1, .prose h2, .prose h3, .prose h4 {
        page-break-after: avoid;
        break-after: avoid;
    }
    .prose pre, .prose blockquote, .prose table {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    /* ── Code blocks ── */
    .prose pre {
        background: #f5f5f5 !important;
        border: 1pt solid #ccc !important;
        border-radius: 0 !important;
        padding: 8pt 10pt !important;
        font-size: 8.5pt !important;
        white-space: pre-wrap;
        word-break: break-word;
        margin-bottom: 8pt;
    }
    .prose pre code {
        color: #000 !important;
        font-size: 8.5pt !important;
    }
    .code-lang-label {
        top: 6pt !important;
        left: 8pt !important;
        background: #e8e8e8 !important;
        border: 1pt solid #ccc !important;
        color: #333 !important;
        font-size: 7pt !important;
    }

    /* ── Inline code ── */
    .prose code {
        background: #f0f0f0 !important;
        border: 1pt solid #ddd !important;
        color: #000 !important;
        font-size: 8.5pt !important;
    }

    /* ── Links: NO URL expansion — too noisy for this site ── */
    .prose a::after { content: none !important; }

    /* ── Tables ── */
    .prose table {
        border-collapse: collapse;
        width: 100%;
        font-size: 9pt;
    }
    .prose th, .prose td {
        border: 1pt solid #ccc !important;
        padding: 3pt 6pt;
    }
    .prose th {
        background: #eee !important;
        font-weight: bold;
    }

    /* ── Tighten vertical spacing ── */
    .page-hero {
        margin-bottom: 0 !important;
    }
    .content-wrap {
        padding-top: 0 !important;
    }
    .prose p { margin: 0 0 5pt !important; }
    .prose h2 { margin-top: 8pt !important; }
    .prose hr { margin: 6pt 0 !important; }
    .prose pre { margin-bottom: 6pt !important; }
    .prose img {
        max-width: 100% !important;
        page-break-inside: avoid;
    }
    .post-hero-img { display: none; }

    /* ── Print URL in footer ── */
    body::after {
        content: "theweeklychallenge.org  ·  " attr(data-url);
        display: block;
        margin-top: 16pt;
        padding-top: 6pt;
        border-top: 1pt solid #ccc;
        font-size: 7.5pt;
        color: #888 !important;
    }
}

/* ── Disqus lazy-load ─────────────────────────────────────────────── */
.disqus-wrap {
    margin: 3rem 0 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}
.disqus-load-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    padding: 10px 22px;
    border-radius: 8px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.disqus-load-btn:hover {
    background: rgba(34,211,238,.1);
}
.disqus-dev {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: .82rem;
    font-style: italic;
}