/* ==========================================================================
   ACADEMIC PERSONAL WEBSITE STYLESHEET
   Truong Thanh Cong | Faculty of Data Science, UFM
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. COLOR PALETTES (THEMES) & DESIGN TOKENS
   -------------------------------------------------------------------------- */

/* Mặc định: Harvard Burgundy (Đỏ rượu vang Học thuật) */
:root {
  --ink: #14181a;
  --ink-dim: #586165;
  --ink-faint: #8a938e;
  --paper: #faf6f6;
  --surface: #ffffff;
  --line: #ebdcdc;
  --accent: #7b1113;
  --accent-ink: #ffffff;
  --accent-soft: #fdf2f4;
  --signal: #92400e;
  --signal-soft: #fef3c7;
  --shadow: 0 1px 2px rgba(20,24,20,.04), 0 10px 30px rgba(20,24,20,.06);
  --focus: #7b1113;
}

:root[data-palette="burgundy"] {
  --paper: #faf6f6;
  --line: #ebdcdc;
  --accent: #7b1113;
  --accent-ink: #ffffff;
  --accent-soft: #fdf2f4;
  --signal: #92400e;
  --signal-soft: #fef3c7;
  --focus: #7b1113;
}

/* Palette 1: Nordic Teal (Xanh chàm học thuật) */
:root[data-palette="teal"] {
  --paper: #f3f5f1;
  --line: #dde2da;
  --accent: #1b5e59;
  --accent-ink: #ffffff;
  --accent-soft: #e3efec;
  --signal: #a5721f;
  --signal-soft: #f3e8d2;
  --focus: #1b5e59;
}

/* Palette 2: Oxford Navy (Xanh Viện Hàn lâm) */
:root[data-palette="navy"] {
  --paper: #f4f6fa;
  --line: #d8dfeb;
  --accent: #1a365d;
  --accent-ink: #ffffff;
  --accent-soft: #e0e7ff;
  --signal: #b45309;
  --signal-soft: #fef3c7;
  --focus: #1a365d;
}

/* Palette 3: Data Science & AI Blue (Xanh Công nghệ Dữ liệu) */
:root[data-palette="datascience"] {
  --paper: #f8fafc;
  --line: #e2e8f0;
  --accent: #0284c7;
  --accent-ink: #ffffff;
  --accent-soft: #e0f2fe;
  --signal: #0ea5e9;
  --signal-soft: #f0f9ff;
  --focus: #0284c7;
}

/* Palette 4: Emerald Minimalist (Xanh ngọc lục bảo) */
:root[data-palette="emerald"] {
  --paper: #f2f7f4;
  --line: #d4e3d9;
  --accent: #047857;
  --accent-ink: #ffffff;
  --accent-soft: #d1fae5;
  --signal: #059669;
  --signal-soft: #ecfdf5;
  --focus: #047857;
}

/* --------------------------------------------------------------------------
   DARK MODE OVERRIDES
   -------------------------------------------------------------------------- */
:root[data-theme="dark"],
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #f7f1f2;
    --ink-dim: #b8a7aa;
    --ink-faint: #7d6b6e;
    --paper: #190d10;
    --surface: #241419;
    --line: #3d212a;
    --accent: #fb7185;
    --accent-ink: #2a0812;
    --accent-soft: #4a1c28;
    --signal: #f43f5e;
    --signal-soft: #30141b;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.4);
    --focus: #fb7185;
  }
}

:root[data-theme="dark"][data-palette="burgundy"] {
  --paper: #190d10;
  --surface: #241419;
  --line: #3d212a;
  --accent: #fb7185;
  --accent-ink: #2a0812;
  --accent-soft: #4a1c28;
  --signal: #f43f5e;
  --signal-soft: #30141b;
}

:root[data-theme="dark"][data-palette="teal"] {
  --paper: #111512;
  --surface: #171b17;
  --line: #2a302a;
  --accent: #7cc2b6;
  --accent-ink: #0c1614;
  --accent-soft: #1c2b28;
  --signal: #dcae5c;
  --signal-soft: #2c2415;
}

:root[data-theme="dark"][data-palette="navy"] {
  --paper: #0c121e;
  --surface: #131c2d;
  --line: #1e2c45;
  --accent: #60a5fa;
  --accent-ink: #0b1528;
  --accent-soft: #1e3a5f;
  --signal: #f59e0b;
  --signal-soft: #2d2010;
}

:root[data-theme="dark"][data-palette="datascience"] {
  --paper: #09131f;
  --surface: #0f1f33;
  --line: #1b3554;
  --accent: #38bdf8;
  --accent-ink: #081b2d;
  --accent-soft: #14375a;
  --signal: #38bdf8;
  --signal-soft: #142a42;
}

:root[data-theme="dark"][data-palette="emerald"] {
  --paper: #0b1712;
  --surface: #12241c;
  --line: #1c382b;
  --accent: #34d399;
  --accent-ink: #062317;
  --accent-soft: #173b2d;
  --signal: #10b981;
  --signal-soft: #122a1f;
}

/* --------------------------------------------------------------------------
   2. BASE & TYPOGRAPHY
   -------------------------------------------------------------------------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Public Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  font-size: 16px;
  transition: background .2s ease, color .2s ease;
}

h1, h2, h3 {
  font-family: "Fraunces", ui-serif, Georgia, serif;
  font-weight: 600;
  text-wrap: balance;
  margin: 0;
  letter-spacing: -0.01em;
}

.mono { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
::selection { background: var(--accent-soft); }

.ai { font-family: 'Academicons'; font-weight: 400; font-style: normal; line-height: 1; display: inline-block; -webkit-font-smoothing: antialiased; }
.fa-brands { font-family: 'Font Awesome 6 Brands'; font-weight: 400; line-height: 1; display: inline-block; }

/* --------------------------------------------------------------------------
   3. TOPBAR & NAVIGATION
   -------------------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 56px;
}
.wordmark { font-family: "Fraunces", serif; font-weight: 600; font-size: 16px; white-space: nowrap; flex: none; }
.wordmark span { color: var(--accent); }
.toplinks { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.toplinks::-webkit-scrollbar { display: none; }
.toplinks a {
  color: var(--ink-dim); text-decoration: none; font-size: 13.5px; font-weight: 500;
  padding: 8px 12px; border-radius: 7px; white-space: nowrap; transition: background .15s, color .15s;
}
.toplinks a:hover { background: var(--accent-soft); color: var(--ink); }

.controls-group { display: flex; align-items: center; gap: 8px; flex: none; }

.lang-toggle {
  display: flex; align-items: center; gap: 3px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
  padding: 3px; cursor: pointer; font-family: "JetBrains Mono", monospace; font-size: 11px; font-weight: 600;
}
.lang-toggle span { padding: 4px 8px; border-radius: 999px; color: var(--ink-faint); }
.lang-toggle span.is-active { background: var(--accent); color: var(--accent-ink); }

/* --------------------------------------------------------------------------
   4. LAYOUT & SIDEBAR
   -------------------------------------------------------------------------- */
.shell {
  max-width: 1120px; margin: 0 auto; padding: 44px 24px 80px;
  display: grid; grid-template-columns: 300px 1fr; gap: 56px; align-items: start;
}
@media (max-width: 860px) { .shell { grid-template-columns: 1fr; gap: 36px; padding: 28px 18px 64px; } }

.sidebar { position: sticky; top: 76px; }
@media (max-width: 860px) { .sidebar { position: static; } }

.sidebar a:has(.portrait) { display: block; text-decoration: none; border-radius: 14px; }
.portrait {
  width: 100%; height: auto; aspect-ratio: 4 / 4.6; object-fit: cover; object-position: center 20%;
  border-radius: 14px; border: 1px solid var(--line); box-shadow: var(--shadow); display: block;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.sidebar a:hover .portrait {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(20, 24, 20, 0.12);
  border-color: var(--accent);
}
.ai { font-family: 'Academicons'; font-weight: 400; font-style: normal; line-height: 1; display: inline-block; -webkit-font-smoothing: antialiased; }
.fa-brands { font-family: 'Font Awesome 6 Brands'; font-weight: 400; line-height: 1; display: inline-block; }

.id-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 22px; }
.id-badge {
  display: flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: 9px; background: var(--accent-soft); color: var(--accent); font-size: 18px;
  text-decoration: none; border: 1px solid transparent; transition: border-color .15s, transform .1s;
}
.id-badge:hover { border-color: var(--accent); transform: translateY(-1px); }

.sidebar h1 { font-size: 26px; margin-bottom: 10px; }
.degrees { display: flex; flex-direction: column; gap: 3px; margin-bottom: 16px; }
.degrees div { font-size: 12.5px; color: var(--ink-dim); font-style: italic; }
.degrees .mono { font-style: normal; color: var(--ink-faint); }

.role-block { font-size: 14px; color: var(--ink-dim); margin-bottom: 18px; }
.role-block strong { color: var(--ink); font-weight: 600; }
.role-block a { display: block; }

.research-line {
  font-size: 13.5px; color: var(--ink-dim); border-left: 2px solid var(--accent);
  padding-left: 12px; margin-bottom: 20px;
}
.research-line b { color: var(--ink); font-weight: 600; }

.contact-mini { font-size: 13px; color: var(--ink-dim); }
.contact-mini div { margin-bottom: 4px; }
.contact-mini .mono { font-size: 12.5px; }

/* --------------------------------------------------------------------------
   5. MAIN CONTENT SECTIONS
   -------------------------------------------------------------------------- */
.content section { scroll-margin-top: 72px; margin-bottom: 56px; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.section-head h2 { font-size: 21px; }
.more-link { font-size: 13px; font-weight: 500; color: var(--accent); text-decoration: none; white-space: nowrap; }
.more-link:hover { text-decoration: underline; }

.lede { font-size: 16px; color: var(--ink-dim); max-width: 66ch; }
.lede a { color: var(--ink); font-weight: 500; }

/* Publications */
.pub-year-group { margin-bottom: 22px; }
.pub-year-group:last-child { margin-bottom: 0; }
.pub-year {
  font-family: "JetBrains Mono", monospace; font-size: 12.5px; color: var(--accent); font-weight: 600;
  margin-bottom: 10px; display: flex; align-items: center; gap: 8px;
}
.pub-year::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.pub-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.pub-item { display: flex; gap: 12px; }
.pub-node { flex: none; width: 6px; padding-top: 8px; }
.pub-node::before { content: ""; display: block; width: 6px; height: 6px; border-radius: 50%; background: var(--ink-faint); }
.pub-body { font-size: 14.5px; color: var(--ink-dim); }
.pub-body a { color: var(--ink); font-weight: 500; text-decoration: none; }
.pub-body a:hover { text-decoration: underline; }
.pub-journal {
  font-family: "JetBrains Mono", monospace; font-size: 10.5px; font-weight: 600; color: var(--accent);
  background: var(--accent-soft); padding: 2px 7px; border-radius: 5px; margin-right: 6px; white-space: nowrap;
  display: inline-block; vertical-align: baseline;
}
.pub-badge {
  font-family: "JetBrains Mono", monospace; font-size: 10px; font-weight: 600;
  padding: 1.5px 6px; border-radius: 4px; margin-right: 7px; white-space: nowrap;
  display: inline-block; vertical-align: baseline; letter-spacing: 0.02em;
  transition: all 0.15s ease;
}
.pub-badge:hover {
  transform: translateY(-1px);
}
.pub-badge-scie {
  background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0;
}
.pub-badge-scopus {
  background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe;
}
.pub-badge-esci {
  background: #faf5ff; color: #7e22ce; border: 1px solid #e9d5ff;
}

:root[data-theme="dark"] .pub-badge-scie {
  background: #064e3b; color: #6ee7b7; border-color: #047857;
}
:root[data-theme="dark"] .pub-badge-scopus {
  background: #1e3a8a; color: #93c5fd; border-color: #2563eb;
}
:root[data-theme="dark"] .pub-badge-esci {
  background: #2e1065; color: #c084fc; border-color: #581c87;
}

.pub-doi-link {
  display: inline-flex; align-items: center; gap: 3px;
  font-family: "JetBrains Mono", monospace; font-size: 10px; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
  padding: 1px 6px; border-radius: 4px; text-decoration: none;
  margin-left: 6px; vertical-align: baseline; white-space: nowrap;
  transition: all 0.15s ease;
}
.pub-doi-link:hover {
  border-color: var(--accent); background: var(--accent); color: var(--accent-ink);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--accent) 18%, transparent);
  text-decoration: none;
}
.pub-doi-icon { font-size: 8.5px; line-height: 1; }

/* Service & Generic Entries */
.group-label {
  font-family: "JetBrains Mono", monospace; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em;
  color: var(--ink); margin: 24px 0 12px; display: flex; align-items: center; gap: 8px;
}
.group-label::before {
  content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 2px;
  background: var(--accent); flex: none;
}
.group-label:first-child { margin-top: 0; }
.group-label-split {
  justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.group-title-wrap {
  display: inline-flex; align-items: center; gap: 8px;
}
.group-title-wrap::before {
  content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 2px;
  background: var(--accent); flex: none;
}
.group-label-split::before { display: none; }

.verified-badges {
  display: inline-flex; align-items: center; flex-wrap: wrap; gap: 6px;
  font-family: "JetBrains Mono", monospace; font-size: 11px; font-weight: 500;
  text-transform: none; letter-spacing: normal; color: var(--ink-faint);
}
.verified-label { color: var(--ink-dim); font-weight: 500; }
.verified-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--accent); text-decoration: none;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent);
  padding: 1.5px 7px; border-radius: 5px; font-size: 10.5px; font-weight: 600;
  transition: all 0.15s ease;
}
.verified-link:hover {
  border-color: var(--accent); transform: translateY(-1px);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--accent) 18%, transparent);
}
.verified-link i { font-size: 11.5px; line-height: 1; }
.verified-sep { color: var(--line); font-size: 10px; }

.group-label .ref-link { font-size: 10.5px; text-transform: none; letter-spacing: 0; font-weight: 600; }
.entry-list { list-style: none; margin: 0 0 4px; padding: 0; display: flex; flex-direction: column; gap: 11px; }
.entry {
  display: flex; gap: 10px; align-items: baseline; font-size: 14.5px; color: var(--ink-dim);
  transition: transform 0.15s ease, color 0.15s ease;
}
.entry:hover { color: var(--ink); }

/* Stylish Color-Adaptive Badges & Buttons */
.entry-tag {
  flex: none; font-family: "JetBrains Mono", monospace; font-size: 11px; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  padding: 2.5px 8px; border-radius: 6px; white-space: nowrap;
  transition: all 0.2s ease; display: inline-flex; align-items: center; gap: 4px;
}
.entry:hover .entry-tag {
  border-color: var(--accent); transform: translateY(-1px);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 15%, transparent);
}

/* Specific Badge Variants */
.tag-chair {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
  font-weight: 700;
}
:root[data-theme="dark"] .tag-chair {
  background: #3b2505;
  color: #fde68a;
  border-color: #854d0e;
}

.tag-committee {
  background: #e0f2fe;
  color: #0369a1;
  border: 1px solid #7dd3fc;
}
:root[data-theme="dark"] .tag-committee {
  background: #082f49;
  color: #7dd3fc;
  border-color: #0369a1;
}

.tag-project {
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #a5b4fc;
  letter-spacing: -0.01em;
  font-weight: 600;
}
:root[data-theme="dark"] .tag-project {
  background: #1e1b4b;
  color: #a5b4fc;
  border-color: #4338ca;
}

/* Publisher Badges with subtle academic publisher identity */
.tag-publisher {
  font-weight: 600;
  transition: all 0.15s ease;
}
.tag-pub-elsevier { background: #fff3ed; color: #c2410c; border: 1px solid #fed7aa; }
.tag-pub-springer { background: #fefce8; color: #a16207; border: 1px solid #fde047; }
.tag-pub-plos { background: #faf5ff; color: #7e22ce; border: 1px solid #e9d5ff; }
.tag-pub-wiley { background: #f0fdfa; color: #0f766e; border: 1px solid #99f6e4; }
.tag-pub-sage { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.tag-pub-ieee { background: #f0f9ff; color: #0369a1; border: 1px solid #bae6fd; }

:root[data-theme="dark"] .tag-pub-elsevier { background: #3c190d; color: #fb923c; border-color: #7c2d12; }
:root[data-theme="dark"] .tag-pub-springer { background: #372808; color: #facc15; border-color: #713f12; }
:root[data-theme="dark"] .tag-pub-plos { background: #2e1065; color: #c084fc; border-color: #581c87; }
:root[data-theme="dark"] .tag-pub-wiley { background: #042f2e; color: #2dd4bf; border-color: #115e59; }
:root[data-theme="dark"] .tag-pub-sage { background: #052e16; color: #4ade80; border-color: #14532d; }
:root[data-theme="dark"] .tag-pub-ieee { background: #082f49; color: #60a5fa; border-color: #1e3a8a; }

.entry-year {
  font-family: "JetBrains Mono", monospace; font-size: 12px; font-weight: 600; color: var(--ink-faint);
}
.entry-year-link {
  font-family: "JetBrains Mono", monospace; font-size: 12px; font-weight: 600;
  color: var(--accent); text-decoration: none;
}
.entry-year-link:hover { text-decoration: underline; }

.entry i { color: var(--ink-faint); font-style: italic; }
.entry a { color: var(--ink); font-weight: 500; transition: color 0.15s ease; }
.entry a:hover { color: var(--accent); }

/* --------------------------------------------------------------------------
   6. EXPANDABLE ACCORDION (JOURNAL REFEREE)
   -------------------------------------------------------------------------- */
.referee-item {
  display: flex; flex-direction: column; gap: 4px;
}
.referee-main {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
}
.referee-journal-wrap {
  display: flex; align-items: baseline; gap: 8px;
}
.referee-expand-btn {
  background: transparent; border: 1px solid transparent; cursor: pointer;
  color: var(--ink-faint); font-family: "JetBrains Mono", monospace; font-size: 11px;
  padding: 1px 6px; border-radius: 4px; display: inline-flex; align-items: center; gap: 4px;
  transition: all .15s ease;
}
.referee-expand-btn:hover {
  background: var(--accent-soft); color: var(--accent); border-color: var(--accent);
}
.referee-expand-icon { font-size: 9px; transition: transform .2s ease; }
.referee-expand-btn.is-active .referee-expand-icon { transform: rotate(180deg); }

.referee-papers-panel {
  display: none;
  margin: 6px 0 4px 14px;
  padding: 8px 12px;
  border-left: 2px solid var(--accent);
  background: var(--surface);
  border-radius: 0 6px 6px 0;
  font-size: 13px;
  box-shadow: var(--shadow);
}
.referee-papers-panel.is-open { display: flex; flex-direction: column; gap: 8px; }
.referee-paper-row { display: flex; flex-direction: column; gap: 2px; }
.referee-paper-title { font-style: italic; color: var(--ink-dim); line-height: 1.45; }
.referee-paper-meta { font-family: "JetBrains Mono", monospace; font-size: 10.5px; color: var(--signal); }

.hindex-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  color: #b45309;
  background: #fffbeb;
  border: 1px solid #fde68a;
  padding: 1.5px 6px;
  border-radius: 5px;
  white-space: nowrap;
  transition: all 0.15s ease;
}
:root[data-theme="dark"] .hindex-tag {
  background: #361e05; color: #fcd34d; border-color: #78350f;
}
.referee-item:hover .hindex-tag {
  border-color: #b45309;
  box-shadow: 0 1px 4px rgba(180, 83, 9, 0.15);
}

.referee-count-badge {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  font-weight: 600;
  color: #047857;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
  transition: all 0.15s ease;
}
:root[data-theme="dark"] .referee-count-badge {
  background: #064e3b; color: #6ee7b7; border-color: #047857;
}
.referee-item:hover .referee-count-badge {
  border-color: #047857;
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(4, 120, 87, 0.15);
}

.referee-more-container {
  display: none;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.referee-more-container.is-open {
  display: flex;
}

.more-journals-btn {
  width: 100%;
  margin-top: 12px;
  padding: 9px 16px;
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all .2s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}
.more-journals-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 15%, transparent);
}
}
.more-journals-icon {
  font-size: 9px;
  transition: transform .2s ease;
}
.more-journals-btn.is-active .more-journals-icon {
  transform: rotate(180deg);
}

/* Courses Card */
.course-card {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; box-shadow: var(--shadow);
}
.course-card p { margin: 4px 0 0; font-size: 13.5px; color: var(--ink-dim); max-width: 46ch; }
.btn {
  flex: none; display: inline-flex; align-items: center; gap: 6px; background: var(--accent); color: var(--accent-ink);
  font-size: 13.5px; font-weight: 600; padding: 10px 16px; border-radius: 8px; text-decoration: none; white-space: nowrap;
}
.btn:hover { opacity: .9; }

/* Contact Grid */
.contact-grid { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: start; }
@media (max-width: 560px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-grid address { font-style: normal; font-size: 14.5px; color: var(--ink-dim); line-height: 1.7; }
.qr-box { text-align: center; font-size: 11px; color: var(--ink-faint); }
.qr-box img { width: 108px; height: 108px; border-radius: 10px; border: 1px solid var(--line); background: #fff; padding: 6px; display: block; margin-bottom: 6px; }

/* Footer */
footer.site {
  max-width: 1120px; margin: 0 auto; padding: 0 24px 40px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-size: 12px; color: var(--ink-faint);
}
.node-motif { opacity: .5; }
.loading-hint { font-size: 13px; color: var(--ink-faint); font-style: italic; }