/* =============================================================================
   styles.css — base reset, layout, components, responsive
   Depends on tokens.css for all colours.
============================================================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; }
img, svg, canvas { max-width: 100%; display: block; }

/* shared helpers ----------------------------------------------------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--sp-5); }
.wrap-narrow { max-width: var(--maxw-narrow); margin: 0 auto; padding-inline: var(--sp-5); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-light); color: var(--accent);
  padding: 6px 14px; border-radius: var(--radius-pill);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; margin-bottom: var(--sp-4);
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.section-title { font-family: var(--font-display); font-size: 1.8rem; margin-bottom: 8px; }
.section-subtitle { color: var(--text-muted); font-size: 0.95rem; margin-bottom: var(--sp-6); }

/* NAV ---------------------------------------------------------------------- */
nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding-inline: var(--sp-5);
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: var(--sp-3);
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700; text-decoration: none; }
.logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.nav-links { display: flex; align-items: center; gap: var(--sp-5); list-style: none; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.nav-links a:hover { color: var(--text); }

.nav-controls { display: flex; align-items: center; gap: var(--sp-2); }

/* theme toggle */
.theme-btn {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: all var(--transition);
}
.theme-btn:hover { color: var(--text); border-color: var(--text-muted); }

/* language switcher */
.lang-switcher { display: flex; gap: 4px; flex-wrap: wrap; }
.lang-btn {
  padding: 4px 9px; border-radius: var(--radius-pill); border: 1px solid var(--border);
  background: transparent; font-family: var(--font-body);
  font-size: 0.74rem; font-weight: 600; color: var(--text-muted);
  cursor: pointer; transition: all var(--transition);
}
.lang-btn.active, .lang-btn:hover { background: var(--text); color: var(--bg); border-color: var(--text); }

/* HERO --------------------------------------------------------------------- */
.hero {
  max-width: var(--maxw); margin: 0 auto; padding: var(--sp-8) var(--sp-5) var(--sp-6);
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center;
}
.hero h1 { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; margin-bottom: var(--sp-4); }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-desc { font-size: 1rem; color: var(--text-muted); line-height: 1.75; margin-bottom: var(--sp-5); }

.callout {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--warn-light); border: 1px solid var(--warn-border);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: 0.8rem; color: var(--warn); line-height: 1.5;
}
.callout svg { flex-shrink: 0; margin-top: 1px; }

.hero-visual { background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); padding: var(--sp-5); box-shadow: var(--shadow); position: relative; overflow: hidden; }
.spectrum-preview { width: 100%; height: 140px; background: var(--surface2); border-radius: var(--radius-sm); margin-bottom: var(--sp-4); display: flex; align-items: center; justify-content: center; }
.mini-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mini-stat { background: var(--bg); border-radius: var(--radius-sm); padding: 12px; text-align: center; }
.mini-stat-val { font-size: 1.25rem; font-weight: 700; }
.mini-stat-lbl { font-size: 0.72rem; color: var(--text-muted); margin-top: 2px; }

/* generic section ---------------------------------------------------------- */
.section { padding: var(--sp-6) var(--sp-5); }
.section.surface { background: var(--surface); border-top: 1px solid var(--border); }

/* MODEL STATUS / PROGRESS -------------------------------------------------- */
.model-status {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: var(--sp-4);
  font-size: 0.85rem;
}
.model-status[data-state="ready"]  { border-color: var(--accent2); }
.model-status[data-state="error"]  { border-color: var(--danger); }
.model-status .dot-pulse { width: 10px; height: 10px; border-radius: 50%; background: var(--warn); flex-shrink: 0; }
.model-status[data-state="loading"] .dot-pulse { animation: pulse 1.2s ease-in-out infinite; }
.model-status[data-state="ready"]  .dot-pulse { background: var(--accent2); animation: none; }
.model-status[data-state="error"]  .dot-pulse { background: var(--danger); animation: none; }
@keyframes pulse { 0%,100% { opacity: 0.3; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.1); } }
.model-status-text { flex: 1; color: var(--text-muted); }
.model-progress-track { width: 120px; height: 6px; background: var(--surface2); border-radius: 6px; overflow: hidden; flex-shrink: 0; }
.model-progress-fill { height: 100%; width: 0; background: var(--accent); border-radius: 6px; transition: width 0.25s ease; }
.model-status[data-state="ready"] .model-progress-track,
.model-status[data-state="error"] .model-progress-track { display: none; }
.retry-btn { display: none; background: var(--danger); color: #fff; border: none; border-radius: var(--radius-sm); padding: 6px 14px; font-family: var(--font-body); font-size: 0.8rem; font-weight: 600; cursor: pointer; }
.model-status[data-state="error"] .retry-btn { display: inline-block; }

/* UPLOAD ------------------------------------------------------------------- */
.upload-card { background: var(--surface); border: 2px dashed var(--border); border-radius: var(--radius); padding: var(--sp-7) var(--sp-5); text-align: center; cursor: pointer; transition: all 0.25s; position: relative; }
.upload-card:hover, .upload-card.drag-over { border-color: var(--accent); background: var(--accent-light); }
.upload-card input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.upload-icon { width: 56px; height: 56px; border-radius: 50%; background: var(--surface2); display: flex; align-items: center; justify-content: center; margin: 0 auto var(--sp-3); color: var(--text-muted); }
.upload-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.upload-sub { font-size: 0.85rem; color: var(--text-muted); }
.upload-formats { display: flex; gap: 8px; justify-content: center; margin-top: var(--sp-3); }
.format-tag { background: var(--surface2); border-radius: 4px; padding: 3px 8px; font-size: 0.75rem; font-weight: 600; color: var(--text-muted); letter-spacing: 0.05em; }

.file-info { display: none; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; margin-top: var(--sp-3); align-items: center; gap: var(--sp-3); }
.file-info.show { display: flex; }
.file-icon { font-size: 1.8rem; flex-shrink: 0; color: var(--text-muted); display: flex; align-items: center; }
.file-details { flex: 1; }
.file-name { font-weight: 600; font-size: 0.95rem; }
.file-meta { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.file-close { background: none; border: none; cursor: pointer; color: var(--text-muted); font-size: 1.2rem; }

/* BUTTON ------------------------------------------------------------------- */
.btn-primary { display: inline-flex; align-items: center; gap: 10px; background: var(--accent); color: #fff; padding: 14px 32px; border-radius: var(--radius-pill); font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; border: none; cursor: pointer; margin-top: var(--sp-4); transition: all var(--transition); box-shadow: 0 4px 16px rgba(37,99,235,0.3); }
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }
.btn-primary:disabled { background: var(--border); color: var(--text-muted); box-shadow: none; cursor: not-allowed; transform: none; }
.btn-center { text-align: center; }

/* RESULTS ------------------------------------------------------------------ */
.results-card { display: none; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); padding: var(--sp-6); margin-top: var(--sp-4); box-shadow: var(--shadow); animation: slideUp 0.4s ease; }
.results-card.show { display: block; }
@keyframes slideUp { from { opacity:0; transform:translateY(20px);} to { opacity:1; transform:translateY(0);} }
.result-header { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-5); }
.result-icon { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.result-icon.low { background: var(--accent2-light); }
.result-icon.high { background: var(--danger-light); }
.result-icon.medium { background: var(--warn-light); }
.result-label { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.result-value { font-family: var(--font-display); font-size: 1.6rem; margin-top: 2px; }
.result-value.low { color: var(--accent2); }
.result-value.high { color: var(--danger); }
.result-value.medium { color: var(--warn); }

.confidence-section { margin-bottom: var(--sp-4); }
.confidence-label { font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; display: flex; justify-content: space-between; }
.confidence-track { height: 10px; background: var(--surface2); border-radius: 10px; overflow: hidden; }
.confidence-fill { height: 100%; border-radius: 10px; transition: width 1s cubic-bezier(.4,0,.2,1); background: linear-gradient(90deg, var(--accent2), #10B981); width: 0; }
.confidence-fill.medium { background: linear-gradient(90deg, var(--warn), #F59E0B); }
.confidence-fill.high-risk { background: linear-gradient(90deg, var(--danger), #EF4444); }

.chart-area { background: var(--bg); border-radius: var(--radius-sm); padding: var(--sp-4); margin-bottom: var(--sp-4); }
.chart-title { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); margin-bottom: 12px; letter-spacing: 0.04em; text-transform: uppercase; }

.meta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: var(--sp-4); }
.meta-box { background: var(--bg); border-radius: var(--radius-sm); padding: 14px; }
.meta-box-key { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; }
.meta-box-val { font-size: 1rem; font-weight: 700; margin-top: 2px; }

.result-disclaimer { background: var(--warn-light); border: 1px solid var(--warn-border); border-radius: var(--radius-sm); padding: 14px 16px; font-size: 0.8rem; color: var(--warn); line-height: 1.6; display: flex; gap: 10px; align-items: flex-start; }
.result-disclaimer svg { flex-shrink: 0; margin-top: 1px; }

/* SCORE BAR (raw model output, full 0–1 range) ----------------------------- */
.score-section { margin-bottom: var(--sp-3); }
.score-header { font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; display: flex; justify-content: space-between; }
.score-track { height: 12px; border-radius: 12px; position: relative; background: var(--surface2); margin: 10px 0; }
.score-zone-low, .score-zone-high { position: absolute; top: 0; bottom: 0; }
.score-zone-low  { left: 0; border-radius: 12px 0 0 12px; background: color-mix(in srgb, var(--accent2) 30%, transparent); }
.score-zone-high { border-radius: 0 12px 12px 0; background: color-mix(in srgb, var(--danger) 28%, transparent); }
.threshold-mark { position: absolute; top: -5px; bottom: -5px; width: 2px; border-radius: 2px;
  background: var(--warn); transform: translateX(-50%); transition: left 0.8s cubic-bezier(.4,0,.2,1); z-index: 2; }
.score-needle { position: absolute; top: -6px; bottom: -6px; width: 4px; border-radius: 4px;
  background: var(--text); transform: translateX(-50%); z-index: 3;
  transition: left 0.9s cubic-bezier(.4,0,.2,1); box-shadow: 0 0 0 3px color-mix(in srgb, var(--text) 18%, transparent); }
.score-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-muted); margin-top: 6px; }
.score-labels .thresh-lbl { color: var(--warn); font-weight: 600; }

/* NN OUTPUT DISCLOSURE ------------------------------------------------------ */
.nn-details { margin-top: var(--sp-3); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.nn-details summary { padding: 12px 16px; font-size: 0.85rem; font-weight: 600; cursor: pointer;
  list-style: none; display: flex; align-items: center; gap: 8px; color: var(--accent); }
.nn-details summary::-webkit-details-marker { display: none; }
.nn-details summary::before { content: '▸'; font-size: 0.7rem; transition: transform 0.2s; flex-shrink: 0; }
.nn-details[open] summary::before { transform: rotate(90deg); }
.nn-details-body { padding: 4px 16px 16px; border-top: 1px solid var(--border); }
.how-computed-body p { font-size: 0.83rem; color: var(--text-muted); margin-top: 12px; line-height: 1.65; }
.how-computed-body code { font-family: monospace; background: var(--surface2); padding: 1px 5px; border-radius: 3px; font-size: 0.85em; }

/* HOW IT WORKS ------------------------------------------------------------- */
.how-section { padding: var(--sp-8) var(--sp-5); background: var(--surface); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); margin-top: var(--sp-5); }
.step { text-align: center; }
.step-num { width: 44px; height: 44px; border-radius: 50%; background: var(--accent-light); color: var(--accent); font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; }
.step h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; }
.step p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; }

/* TOPICS SECTION (main page, auto-generated list) -------------------------- */
.topics-section { padding: var(--sp-8) var(--sp-5); background: var(--bg); border-top: 1px solid var(--border); }
.topics-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: var(--sp-5); gap: var(--sp-3); }
.topics-head .section-title { margin-bottom: 0; }
.topics-all-link { font-size: 0.875rem; font-weight: 600; color: var(--accent); text-decoration: none; white-space: nowrap; padding-bottom: 4px; }
.topics-all-link:hover { text-decoration: underline; }

.topics-list { border-top: 1px solid var(--border); }
.topic-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0 var(--sp-4);
  align-items: start;
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none; color: inherit;
  transition: background var(--transition);
}
a.topic-row:hover { background: var(--surface); margin-inline: calc(-1 * var(--sp-3)); padding-inline: var(--sp-3); border-radius: var(--radius-sm); }
.topic-num { font-size: 0.78rem; color: var(--text-muted); font-variant-numeric: tabular-nums; padding-top: 3px; }
.topic-body { min-width: 0; }
.topic-body { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.topic-title { font-family: var(--font-display); font-size: 1.15rem; line-height: 1.3; }
.topic-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }
.topic-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; padding-top: 3px; flex-shrink: 0; }
.topic-cat { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); font-weight: 600; }
.topic-arrow { font-size: 0.8rem; color: var(--accent); font-weight: 600; }

/* LEARN HUB LIST (learn/index.html) ---------------------------------------- */
.hub-list { margin-top: var(--sp-5); border-top: 1px solid var(--border); }
.hub-row {
  display: grid; grid-template-columns: 1fr auto;
  gap: var(--sp-3); align-items: center;
  padding: var(--sp-4) 0; border-bottom: 1px solid var(--border);
  text-decoration: none; color: inherit;
  transition: opacity var(--transition);
}
.hub-row:hover { opacity: 0.75; }
.hub-row-cat { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--accent); font-weight: 600; margin-bottom: 4px; }
.hub-row-title { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 4px; }
.hub-row-desc { font-size: 0.83rem; color: var(--text-muted); }
.hub-row-mins { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; }
.hub-row-arrow { font-size: 0.9rem; color: var(--accent); font-weight: 600; }

/* RESOURCES PAGE ------------------------------------------------------------ */
.resource-grid { display: grid; gap: var(--sp-3); margin-top: var(--sp-4); }
.resource-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--sp-4); text-decoration: none; color: inherit; display: flex; gap: var(--sp-3); align-items: flex-start; transition: border-color var(--transition); }
.resource-card:hover { border-color: var(--accent); }
.resource-card > div:last-child { min-width: 0; overflow-wrap: anywhere; }
.resource-type-badge { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.07em; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.resource-card-title { font-weight: 600; font-size: 0.95rem; margin-bottom: 4px; overflow-wrap: anywhere; }
.resource-card-desc { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; }
.resource-type-icon { width: 36px; height: 36px; border-radius: var(--radius-sm); background: var(--accent-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.resource-type-icon svg { color: var(--accent); }

/* ARTICLE LANG SECTIONS ----------------------------------------------------- */
.article-lang { display: none; }
.article-lang.active { display: block; }
.article-lang-notice { font-size: 0.78rem; color: var(--text-muted); background: var(--surface2); border-radius: var(--radius-sm); padding: 8px 12px; margin-bottom: var(--sp-4); }

/* ICON SLOTS (swap the SVG inside for a custom icon) ----------------------- */
.icon-slot { width: 38px; height: 38px; border-radius: var(--radius-sm); background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.icon-slot svg { width: 18px; height: 18px; }
.topic-row .icon-slot { width: 34px; height: 34px; }

/* ABOUT / TEAM -------------------------------------------------------------- */
.about-section { padding: var(--sp-7) var(--sp-5) var(--sp-8); }
.about-lead { font-size: 1.1rem; color: var(--text-muted); line-height: 1.7; margin-bottom: var(--sp-5); max-width: 680px; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); margin-top: var(--sp-5); }
.team-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--sp-4); text-align: center; }
.team-avatar { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto var(--sp-3); background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 1.4rem; overflow: hidden; }
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-name { font-weight: 600; font-size: 0.98rem; }
.team-role { font-size: 0.82rem; color: var(--text-muted); margin-top: 3px; }

/* FOOTER ------------------------------------------------------------------- */
footer { border-top: 1px solid var(--border); padding: var(--sp-5); text-align: center; font-size: 0.8rem; color: var(--text-muted); }
footer strong { color: var(--text); }
footer a { color: var(--accent); text-decoration: none; }

/* SPINNER ------------------------------------------------------------------ */
.spinner { display: none; margin: var(--sp-4) auto; width: 40px; height: 40px; border: 3px solid var(--surface2); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
.spinner.show { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ARTICLE (learn sub-pages) ------------------------------------------------ */
.article { max-width: 760px; margin: 0 auto; padding: var(--sp-7) var(--sp-5) var(--sp-8); }
.article .breadcrumb { font-size: 0.82rem; color: var(--text-muted); margin-bottom: var(--sp-4); }
.article .breadcrumb a { color: var(--accent); text-decoration: none; }
.article h1 { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 2.6rem); line-height: 1.2; margin-bottom: var(--sp-4); }
.article h2 { font-family: var(--font-display); font-size: 1.5rem; margin: var(--sp-6) 0 var(--sp-3); }
.article p { color: var(--text); margin-bottom: var(--sp-3); }
.article ul { margin: 0 0 var(--sp-3) 1.25rem; color: var(--text); }
.article li { margin-bottom: 6px; }
.article .lead { font-size: 1.1rem; color: var(--text-muted); margin-bottom: var(--sp-5); }
.article .source { font-size: 0.8rem; color: var(--text-muted); }

.resource-list { list-style: none; margin: 0; display: grid; gap: var(--sp-3); }
.resource-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--sp-4); display: flex; gap: var(--sp-3); align-items: flex-start; text-decoration: none; transition: border-color var(--transition); }
.resource-item:hover { border-color: var(--accent); }
.resource-item .r-icon { font-size: 1.6rem; flex-shrink: 0; }
.resource-item .r-title { font-weight: 600; margin-bottom: 4px; }
.resource-item .r-desc { font-size: 0.85rem; color: var(--text-muted); }
.resource-item .r-type { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); font-weight: 700; }

/* RTL ---------------------------------------------------------------------- */
[dir="rtl"] .nav-inner,
[dir="rtl"] .result-header,
[dir="rtl"] .file-info { direction: rtl; }
[dir="rtl"] .article { text-align: right; }
[dir="rtl"] .article ul { margin: 0 1.25rem var(--sp-3) 0; }

/* RESPONSIVE --------------------------------------------------------------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: var(--sp-5); padding: var(--sp-6) var(--sp-4) var(--sp-5); }
  .hero-visual { order: -1; }
  .edu-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
}
@media (max-width: 560px) {
  .nav-links { display: none; }
  .nav-inner { height: 58px; }
  .lang-switcher { gap: 2px; }
  .lang-btn { padding: 4px 7px; font-size: 0.7rem; }
  .edu-grid { grid-template-columns: 1fr; }
  .meta-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .section, .how-section, .edu-section, .topics-section { padding-inline: var(--sp-4); }
  .results-card { padding: var(--sp-4); }
  .model-progress-track { width: 80px; }

  /* topics list: drop the number column, let category/arrow wrap under */
  .topics-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .topic-row { grid-template-columns: 1fr; gap: 6px; }
  a.topic-row:hover { margin-inline: 0; padding-inline: 0; }
  .topic-num { display: none; }
  .topic-meta { flex-direction: row; align-items: center; gap: 10px; }

  /* hub + resource cards stack their trailing meta */
  .hub-row { grid-template-columns: 1fr; gap: 8px; }
  .team-grid { grid-template-columns: 1fr 1fr; }
}