/* ============================================================
   DC Engineer — MuJoCo PyDemos
   Dark theme inspired by armor.dc-engineer.com
   Bootstrap 5.3 dark mode base + custom overrides
   ============================================================ */

/* ── Self-hosted fonts ─────────────────────────────────────────
   Inter variable (v20) and JetBrains Mono variable (v24).
   Both are variable fonts: one WOFF2 file per unicode subset
   covers all weights, so 13 files replace 47 @font-face blocks.
   Served from /assets/fonts/ — no requests to fonts.gstatic.com.
   ─────────────────────────────────────────────────────────────── */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-cyrillic-ext.woff2') format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-cyrillic.woff2') format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-greek-ext.woff2') format('woff2');
  unicode-range: U+1F00-1FFF; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-greek.woff2') format('woff2');
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400 800; font-display: swap;
  src: url('/assets/fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-cyrillic-ext.woff2') format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-cyrillic.woff2') format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-greek.woff2') format('woff2');
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400 500; font-display: swap;
  src: url('/assets/fonts/jbmono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

/* ── Custom properties ─────────────────────────────────────── */
:root {
  --dc-bg:          #070c17;
  --dc-surface:     #0c1525;
  --dc-card:        #10192b;
  --dc-border:      #1b2e45;
  --dc-text:        #e6edf5;
  --dc-muted:       #7a92ab;
  --dc-accent:      #4ade80;
  --dc-accent-dim:  #22c55e;
  --dc-accent-glow: rgba(74, 222, 128, 0.12);
  --dc-font-mono:   'JetBrains Mono', 'Fira Mono', ui-monospace, monospace;
}

/* ── Bootstrap dark mode overrides ────────────────────────── */
[data-bs-theme="dark"] {
  --bs-body-bg:              var(--dc-bg);
  --bs-body-color:           var(--dc-text);
  --bs-secondary-color:      var(--dc-muted);
  --bs-border-color:         var(--dc-border);
  --bs-link-color:           var(--dc-accent);
  --bs-link-hover-color:     var(--dc-accent-dim);
  --bs-card-bg:              var(--dc-card);
  --bs-card-border-color:    var(--dc-border);
  --bs-code-color:           var(--dc-accent);
  --bs-navbar-color:         var(--dc-muted);
  --bs-navbar-hover-color:   var(--dc-text);
}

/* ── Body ──────────────────────────────────────────────────── */
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--dc-bg);
  color: var(--dc-text);
  min-height: 100vh;
  /* Subtle dot grid — references the blueprint texture on armor.dc-engineer.com */
  background-image: radial-gradient(rgba(74, 222, 128, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  background-attachment: fixed;
}

/* ── Navbar ────────────────────────────────────────────────── */
.navbar-dc {
  background: rgba(7, 12, 23, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--dc-border);
}

.navbar-brand-dc {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--dc-text) !important;
  text-decoration: none;
}

.navbar-brand-dc .accent { color: var(--dc-accent); }

.navbar-dc .nav-link {
  color: var(--dc-muted) !important;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  transition: color 0.15s;
  padding: 0.45rem 0.75rem;
}

.navbar-dc .nav-link:hover { color: var(--dc-text) !important; }

.navbar-dc .navbar-toggler {
  border: 1px solid var(--dc-border);
  padding: 0.3rem 0.6rem;
}

.navbar-dc .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2874%2C222%2C128%2C0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ARMOR pill button in navbar */
.btn-armor-nav {
  display: inline-block;
  background: var(--dc-accent-glow);
  border: 1px solid rgba(74, 222, 128, 0.4);
  color: var(--dc-accent) !important;
  border-radius: 6px;
  padding: 0.35rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none !important;
  transition: background 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.btn-armor-nav:hover {
  background: rgba(74, 222, 128, 0.18);
  box-shadow: 0 0 14px rgba(74, 222, 128, 0.15);
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  padding: 6rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Radial glow from top */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 55% at 50% -5%,
    rgba(74, 222, 128, 0.09) 0%, transparent 65%);
  pointer-events: none;
}

.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dc-accent);
  margin-bottom: 1.1rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
  color: var(--dc-text);
  margin-bottom: 1.25rem;
}

.hero-title .accent { color: var(--dc-accent); }

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--dc-muted);
  max-width: 530px;
  margin: 0 auto 2.75rem;
  line-height: 1.65;
}

.btn-primary-dc {
  display: inline-block;
  background: var(--dc-accent);
  color: #07110e !important;
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.65rem 1.6rem;
  border-radius: 7px;
  text-decoration: none !important;
  border: none;
  transition: background 0.15s, box-shadow 0.15s;
}

.btn-primary-dc:hover {
  background: var(--dc-accent-dim);
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.25);
}

.btn-armor-hero {
  display: inline-block;
  background: transparent;
  border: 1px solid rgba(74, 222, 128, 0.35);
  color: var(--dc-accent) !important;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.65rem 1.6rem;
  border-radius: 7px;
  text-decoration: none !important;
  transition: background 0.15s, border-color 0.15s;
}

.btn-armor-hero:hover {
  background: var(--dc-accent-glow);
  border-color: var(--dc-accent);
}

/* ── Section headers ───────────────────────────────────────── */
.section-eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dc-accent);
  margin-bottom: 0.4rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.4rem;
}

/* ── Demo cards ────────────────────────────────────────────── */
#demos { padding: 4rem 0 3rem; }

.demo-card {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  height: 100%;
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.demo-card:hover {
  border-color: rgba(74, 222, 128, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(74, 222, 128, 0.07);
}

.demo-card-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--dc-border);
  background: var(--dc-surface);
}

.demo-card-body {
  padding: 1.2rem 1.35rem 1.4rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.demo-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dc-text);
  margin-bottom: 0.4rem;
}

.demo-card-desc {
  font-size: 0.86rem;
  color: var(--dc-muted);
  flex: 1;
  margin-bottom: 1rem;
  line-height: 1.55;
}

.demo-tag {
  display: inline-block;
  background: rgba(74, 222, 128, 0.07);
  border: 1px solid rgba(74, 222, 128, 0.22);
  color: var(--dc-accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  margin-right: 0.3rem;
  margin-bottom: 0.3rem;
}

.btn-demo-link {
  display: inline-block;
  border: 1px solid var(--dc-border);
  color: var(--dc-muted) !important;
  font-size: 0.83rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  text-decoration: none !important;
  transition: border-color 0.15s, color 0.15s;
  align-self: flex-start;
}

.btn-demo-link:hover {
  border-color: var(--dc-accent);
  color: var(--dc-accent) !important;
}

/* ── ARMOR promo banner ────────────────────────────────────── */
.armor-banner {
  background: linear-gradient(130deg, #0b1628 0%, #0d1e34 100%);
  border: 1px solid var(--dc-border);
  border-radius: 14px;
  padding: 3rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 1rem 0 5rem;
}

.armor-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 50%,
    rgba(74, 222, 128, 0.06) 0%, transparent 55%);
  pointer-events: none;
}

.armor-banner-title {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.armor-banner-body {
  color: var(--dc-muted);
  max-width: 500px;
  margin: 0 auto 1.75rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

.btn-armor-banner {
  display: inline-block;
  background: var(--dc-accent-glow);
  border: 1px solid var(--dc-accent);
  color: var(--dc-accent) !important;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.65rem 1.75rem;
  border-radius: 8px;
  text-decoration: none !important;
  transition: background 0.15s, box-shadow 0.15s;
}

.btn-armor-banner:hover {
  background: rgba(74, 222, 128, 0.2);
  box-shadow: 0 0 20px rgba(74, 222, 128, 0.18);
}

/* ── Demo page ─────────────────────────────────────────────── */
.demo-page { padding-top: 2.5rem; padding-bottom: 5rem; }

.breadcrumb-dc {
  font-size: 0.8rem;
  color: var(--dc-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-dc a {
  color: var(--dc-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.breadcrumb-dc a:hover { color: var(--dc-accent); }
.breadcrumb-dc .sep { opacity: 0.4; }

.demo-page-title {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.demo-page-subtitle {
  font-size: 1rem;
  color: var(--dc-muted);
  max-width: 580px;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

/* Responsive 16:9 YouTube embed */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--dc-border);
  background: var(--dc-surface);
  margin-bottom: 2rem;
}

.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Portrait (9:16) wrapper for YouTube Shorts */
.video-wrapper.video-wrapper-short {
  padding-bottom: 0;
  height: auto;
  aspect-ratio: 9 / 16;
  max-width: 380px;
  margin-left: auto;
  margin-right: auto;
}

/* Markdown content area */
.demo-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 0.65rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--dc-border);
}

.demo-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  color: var(--dc-text);
}

.demo-content p { color: var(--dc-muted); line-height: 1.75; }

.demo-content ul, .demo-content ol {
  color: var(--dc-muted);
  line-height: 1.75;
  padding-left: 1.4rem;
}

.demo-content code {
  background: var(--dc-surface);
  border: 1px solid var(--dc-border);
  padding: 0.14em 0.44em;
  border-radius: 4px;
  font-family: var(--dc-font-mono);
  font-size: 0.84em;
  color: var(--dc-accent);
}

a.inline-code-link {
  text-decoration: none;
}
a.inline-code-link code {
  border-color: var(--dc-accent);
  transition: background 0.15s, border-color 0.15s;
}
a.inline-code-link:hover code {
  background: rgba(74, 222, 128, 0.12);
  border-color: var(--dc-accent);
}

.demo-content pre {
  background: #080f1e;
  border: 1px solid var(--dc-border);
  border-radius: 9px;
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  margin: 1.25rem 0;
}

.demo-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.83rem;
  color: #b4cce4;
  font-family: var(--dc-font-mono);
}

/* ── Sidebar widgets ───────────────────────────────────────── */
.sidebar-card {
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.25rem;
}

.sidebar-card-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dc-muted);
  margin-bottom: 0.9rem;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  font-size: 0.84rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid rgba(27, 46, 69, 0.6);
}

.spec-row:last-child { border-bottom: none; }
.spec-label { color: var(--dc-muted); white-space: nowrap; }
.spec-value { color: var(--dc-text); font-weight: 500; text-align: right; }

.plot-img {
  width: 100%;
  border: 1px solid var(--dc-border);
  border-radius: 9px;
  background: var(--dc-surface);
  display: block;
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--dc-border);
  padding: 2.25rem 0;
  font-size: 0.83rem;
  color: var(--dc-muted);
  background: rgba(7, 12, 23, 0.6);
}

.site-footer a {
  color: var(--dc-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.site-footer a:hover { color: var(--dc-accent); }

.footer-armor-link {
  color: var(--dc-accent) !important;
  font-weight: 600;
}

.footer-also-by {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem 1rem;
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--dc-border);
}

.footer-also-label {
  font-size: 0.75rem;
  color: var(--dc-muted);
  opacity: 0.6;
  letter-spacing: 0.03em;
}

.footer-also-link {
  font-size: 0.78rem;
  color: var(--dc-muted) !important;
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.15s, color 0.15s;
}

.footer-also-link:hover {
  color: var(--dc-text) !important;
  opacity: 1;
}

/* ── Source files sidebar card ─────────────────────────────── */
.source-file-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.38rem 0;
  border-bottom: 1px solid rgba(27, 46, 69, 0.55);
}

.source-file-row:last-of-type { border-bottom: none; }

.file-ext-badge {
  font-family: var(--dc-font-mono);
  font-size: 0.64rem;
  font-weight: 600;
  text-transform: uppercase;
  background: rgba(74, 222, 128, 0.08);
  border: 1px solid rgba(74, 222, 128, 0.22);
  color: var(--dc-accent);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  min-width: 2.4rem;
  text-align: center;
  flex-shrink: 0;
}

.source-file-link {
  font-family: var(--dc-font-mono);
  font-size: 0.8rem;
  color: var(--dc-muted);
  text-decoration: none;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s;
}

.source-file-link:hover { color: var(--dc-accent); }

.source-raw-link {
  font-size: 0.78rem;
  color: var(--dc-border);
  text-decoration: none;
  flex-shrink: 0;
  padding: 0 0.2rem;
  transition: color 0.15s;
  line-height: 1;
}

.source-raw-link:hover { color: var(--dc-accent); }

.source-file-footer {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--dc-border);
}

.source-resource-link {
  font-size: 0.82rem;
  color: var(--dc-muted);
  text-decoration: none;
  padding: 0.25rem 0;
  transition: color 0.15s;
}

.source-resource-link:hover { color: var(--dc-accent); }

/* ── Demo prev/next navigation ─────────────────────────────── */
.demo-nav-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid var(--dc-border);
  margin-top: 2rem;
}

.demo-nav-btn {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem 1.1rem;
  background: var(--dc-surface);
  border: 1px solid var(--dc-border);
  border-radius: 8px;
  text-decoration: none !important;
  transition: border-color 0.15s, background 0.15s;
  max-width: 48%;
}

.demo-nav-btn:hover {
  border-color: var(--dc-accent);
  background: var(--dc-card);
}

.demo-nav-label {
  font-size: 0.75rem;
  color: var(--dc-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.demo-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dc-text);
}

.demo-nav-btn--next {
  text-align: right;
  margin-left: auto;
}

/* ── Resource cards (home page) ────────────────────────────── */
.resource-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: var(--dc-card);
  border: 1px solid var(--dc-border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  text-decoration: none !important;
  transition: border-color 0.2s, transform 0.2s;
  height: 100%;
}

.resource-card:hover {
  border-color: rgba(74, 222, 128, 0.45);
  transform: translateY(-2px);
}

.resource-icon {
  font-size: 1.25rem;
  margin-bottom: 0.1rem;
  opacity: 0.7;
}

.resource-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--dc-text);
}

.resource-desc {
  font-size: 0.8rem;
  color: var(--dc-muted);
  line-height: 1.45;
}

/* ── Standalone page layout ────────────────────────────────── */
.page-content {
  max-width: 760px;
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--dc-bg); }
::-webkit-scrollbar-thumb { background: var(--dc-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2a4060; }

/* ── MuJoCo WASM viewer (catcher page) ────────────────────── */
#mujoco-canvas-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--dc-border);
  background: #121e2d;
  margin-bottom: 1rem;
}

#mujoco-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.mujoco-status {
  font-size: 0.9rem;
  color: var(--dc-muted);
  margin-bottom: 0.75rem;
  min-height: 1.3em;
}

.mujoco-status--error { color: #f87171; }

.mujoco-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.btn-mujoco-reset {
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-family: inherit;
  border-radius: 6px;
  border: 1px solid var(--dc-border);
  background: var(--dc-card);
  color: var(--dc-text);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.btn-mujoco-reset:hover:not(:disabled) {
  border-color: var(--dc-accent);
  background: rgba(74, 222, 128, 0.08);
}

.btn-mujoco-reset:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Utility ───────────────────────────────────────────────── */
.text-accent  { color: var(--dc-accent) !important; }
.text-dc-muted { color: var(--dc-muted) !important; }