/* ══════════════════════════════════════
   BASE & RESET
══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  /* ── Background scale: slightly lighter for better readability ── */
  --bg: #101e2f;      /* was #0d1b2a — +3 brightness steps */
  --bg2: #162537;     /* was #112233 */
  --bg3: #1e3349;     /* was #1a2f45 */
  --bg4: #243d57;     /* was #1e3a54 */
  --surface: #1b3048; /* was #162840 */
  --surface2: #22395a;/* was #1d3550 */
  --border: #2e5070;  /* was #2a4a6a */
  --border2: #3e607e; /* was #3a5a7a */
  --accent: #52cbff;  /* was #4fc3f7 — slightly brighter */
  --accent2: #2ebfff; /* was #29b6f6 */
  --accent3: #88d8ff; /* was #81d4fa */
  --gold: #ffd54f; --gold2: #ffca28;
  --green: #6ec771; --red: #f25350; --orange: #ffb030; --purple: #ba57cc;
  /* ── Text: higher contrast on dark backgrounds ── */
  --text: #eef6ff;    /* was #e0f0ff — brighter primary text */
  --text2: #b8d2ee;   /* was #a8c8e8 — improved secondary */
  --text3: #84aece;   /* was #6a9ab8 — WCAG AA pass on --bg */
  --shadow: rgba(0,0,0,0.45);
  --radius: 10px; --radius-sm: 6px; --radius-lg: 16px;
  --font: 'Segoe UI', system-ui, sans-serif;
  /* ── Focus ring ── */
  --focus-ring: 0 0 0 3px rgba(82,203,255,0.5);
}
/* ── Light theme ── */
[data-theme="light"] {
  --bg: #f0f7ff;
  --bg2: #e4f0fb;
  --bg3: #d4e8f8;
  --bg4: #c4ddf5;
  --surface: #ffffff;
  --surface2: #edf5fd;
  --border: #b0cce8;
  --border2: #90b8dc;
  --text: #0d1b2a;
  --text2: #2a4a6a;
  --text3: #3a6a9a;
  --accent: #0077b6;
  --accent2: #005f9e;
  --accent3: #0096c7;
  --gold: #b07d00; --gold2: #9a6d00;
  --shadow: rgba(0,0,0,0.12);
  --focus-ring: 0 0 0 3px rgba(0,119,182,0.4);
}
[data-theme="light"] .ship-label-div {
  background: rgba(255,255,255,0.92);
}
[data-theme="light"] .ship-label-div:hover,
[data-theme="light"] .ship-label-div.active {
  background: var(--accent);
  color: #ffffff;
}
html { font-size: 16px; } /* was 15px — 16px minimum for accessibility */
body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; line-height: 1.6; }

/* ── Global focus-visible for keyboard navigation (WCAG 2.4.7) ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}
:focus:not(:focus-visible) { outline: none; }

/* ── Respect reduced motion preference ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Header ── */
.header { background: var(--bg2); border-bottom: 2px solid var(--accent); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 20px rgba(79,195,247,0.15); }
.header-inner { max-width: 1400px; margin: 0 auto; padding: 0 20px; height: 58px; display: flex; align-items: center; gap: 16px; }
.logo { display: flex; align-items: center; gap: 8px; }
.logo-icon { font-size: 1.5rem; }
.logo-text { font-size: 1rem; font-weight: 700; color: var(--accent); white-space: nowrap; }
.nav { display: flex; gap: 3px; flex: 1; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav-btn { background: transparent; border: 1px solid transparent; color: var(--text2); padding: 5px 12px; border-radius: var(--radius-sm); cursor: pointer; font-size: 0.85rem; font-family: var(--font); transition: all 0.2s; }
.nav-btn:hover { background: var(--bg3); color: var(--text); border-color: var(--border2); }
.nav-btn.active { background: var(--accent); color: #0a1520; font-weight: 700; border-color: var(--accent); }
.lang-selector { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text3); white-space: nowrap; }
.theme-toggle { background: transparent; border: 1px solid var(--border2); color: var(--text2); border-radius: var(--radius-sm); padding: 4px 9px; cursor: pointer; font-size: 1rem; transition: all 0.2s; flex-shrink: 0; line-height: 1; }
.theme-toggle:hover { background: var(--bg3); color: var(--text); border-color: var(--accent); }
.lang-selector select, select { background: var(--bg3); border: 1px solid var(--border); color: var(--text); padding: 4px 8px; border-radius: var(--radius-sm); font-size: 0.82rem; cursor: pointer; font-family: var(--font); }

/* ── Main / Pages ── */
.main { flex: 1; max-width: 1400px; margin: 0 auto; width: 100%; padding: 16px; }
.page { display: none; }
.page.active { display: block; }

/* ══════════════════════════════════════
   3D SHIP PAGE
══════════════════════════════════════ */
.ship3d-layout { display: grid; grid-template-columns: 1fr 310px; gap: 16px; min-height: 560px; margin-bottom: 20px; }
.ship3d-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; }
.ship3d-controls-bar { padding: 10px 14px; background: var(--bg3); border-bottom: 1px solid var(--border); font-size: 0.78rem; color: var(--text3); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ship3d-hint { white-space: nowrap; }
.ship3d-cat-filters { display: flex; gap: 5px; flex-wrap: wrap; }
.cat-filter-btn { padding: 2px 9px; border-radius: 20px; border: 1px solid currentColor; background: transparent; font-size: 0.72rem; cursor: pointer; transition: all 0.15s; font-family: var(--font); opacity: 0.6; }
.cat-filter-btn.active { opacity: 1; font-weight: 700; }
.cat-filter-btn:hover { opacity: 1; }

.ship3d-container { position: relative; flex: 1; min-height: 480px; }
.ship3d-container canvas { display: block; width: 100% !important; height: 100% !important; }

/* CSS2D labels overlay */
.ship3d-container > div:last-child { position: absolute !important; top: 0 !important; left: 0 !important; pointer-events: none; }

.ship3d-loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--text3); font-size: 1rem; z-index: 10; }

.ship-label-div {
  background: rgba(13,27,42,0.85);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-family: var(--font);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.2s;
  pointer-events: auto;
  user-select: none;
}
.ship-label-div:hover, .ship-label-div.active {
  background: var(--accent);
  color: #0d1b2a;
  font-weight: 700;
}

/* Info Panel (shared) */
.info-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px; overflow-y: auto; max-height: 560px; }
.info-placeholder { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 200px; gap: 10px; color: var(--text3); text-align: center; font-size: 0.88rem; }
.placeholder-icon { font-size: 2.5rem; opacity: 0.35; }
.info-category { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 1.5px; font-weight: 700; padding: 2px 10px; border-radius: 20px; display: inline-block; margin-bottom: 8px; }
.info-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 14px; line-height: 1.3; }
.info-translations { display: grid; grid-template-columns: auto 1fr; gap: 5px 10px; margin-bottom: 14px; font-size: 0.85rem; }
.trans-lang { color: var(--text3); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; padding-top: 1px; }
.trans-text { color: var(--text); }
.trans-text.current { color: var(--accent); font-weight: 600; }
.info-description { font-size: 0.85rem; color: var(--text2); line-height: 1.7; background: var(--bg3); padding: 10px 12px; border-radius: var(--radius-sm); border-left: 3px solid var(--accent); }

/* Terms Grid */
.terms-section { margin-top: 16px; }
.terms-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.terms-header h3 { font-size: 0.95rem; }
.search-input { background: var(--surface2); border: 1px solid var(--border); color: var(--text); padding: 6px 10px; border-radius: var(--radius-sm); font-size: 0.85rem; font-family: var(--font); outline: none; min-width: 200px; }
.search-input:focus { border-color: var(--accent); }
.terms-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; }
.term-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; cursor: pointer; transition: all 0.2s; position: relative; overflow: hidden; }
.term-card::before { content:''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: currentColor; opacity: 0.6; }
.term-card:hover { background: var(--surface2); border-color: var(--border2); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.3); }
.term-card.active { border-color: var(--accent); background: var(--bg4); }
.term-name { font-size: 0.88rem; font-weight: 600; color: var(--text); margin-bottom: 3px; }
.term-translation { font-size: 0.75rem; color: var(--text2); }
.term-cat-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; margin-right: 4px; vertical-align: middle; }

/* ══════════════════════════════════════
   SAILING COURSES PAGE
══════════════════════════════════════ */
.courses-layout { display: grid; grid-template-columns: 560px 1fr; gap: 24px; align-items: start; }
.courses-diagram-wrap h2 { color: var(--accent); font-size: 1.15rem; margin-bottom: 14px; }
.courses-canvas-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); display: inline-block; padding: 10px; }
#courses-canvas { display: block; border-radius: var(--radius); }
.courses-tack-toggle { display: flex; gap: 8px; margin-top: 12px; }
.tack-btn { flex: 1; padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border2); background: var(--surface2); color: var(--text2); cursor: pointer; font-family: var(--font); font-size: 0.85rem; transition: all 0.2s; }
.tack-btn.active { background: var(--accent); color: #0d1b2a; border-color: var(--accent); font-weight: 700; }
.tack-btn:hover:not(.active) { background: var(--bg4); }

.courses-info-panel { padding: 4px; }
.course-info-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; margin-bottom: 16px; }
.course-name-main { font-size: 1.5rem; font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.course-angle { font-size: 0.85rem; color: var(--text3); margin-bottom: 16px; }
.courses-list { display: flex; flex-direction: column; gap: 6px; }
.course-item { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-radius: var(--radius-sm); background: var(--bg3); border: 1px solid transparent; cursor: pointer; transition: all 0.15s; }
.course-item:hover { border-color: var(--border2); }
.course-item.active { border-color: currentColor; font-weight: 600; }
.course-color-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.course-item-name { font-size: 0.9rem; flex: 1; }
.course-item-en { font-size: 0.78rem; color: var(--text3); }
.course-item-angle { font-size: 0.75rem; color: var(--text3); }
.courses-glossary h4 { color: var(--text2); font-size: 0.85rem; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.courses-term-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 8px; }
.courses-term-card h5 { color: var(--accent); font-size: 0.9rem; margin-bottom: 4px; }
.courses-term-card p { font-size: 0.8rem; color: var(--text2); line-height: 1.5; }

/* ══════════════════════════════════════
   COLREGS PAGE
══════════════════════════════════════ */
.colregs-header { margin-bottom: 20px; }
.colregs-header h2 { color: var(--accent); font-size: 1.3rem; margin-bottom: 6px; }
.colregs-subtitle { color: var(--text3); font-size: 0.85rem; }
.colregs-scenarios { display: grid; grid-template-columns: repeat(auto-fill, minmax(460px, 1fr)); gap: 20px; }
.colregs-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.colregs-card-header { padding: 14px 18px; background: var(--bg3); border-bottom: 1px solid var(--border); }
.colregs-rule-badge { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.colregs-card-title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.colregs-card-title-en { font-size: 0.82rem; color: var(--text3); }
.colregs-card-body { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.colregs-animation-wrap { padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.colregs-canvas { border-radius: var(--radius-sm); background: #0c1f34; display: block; width: 100%; } /* was #061525 — slightly lighter canvas bg */
.colregs-lights-wrap { display: flex; gap: 8px; justify-content: center; }
.colregs-lights-panel { background: var(--bg3); border-radius: var(--radius-sm); padding: 8px 10px; text-align: center; flex: 1; }
.colregs-lights-title { font-size: 0.7rem; color: var(--text3); margin-bottom: 6px; text-transform: uppercase; }
.lights-display { display: flex; gap: 4px; justify-content: center; align-items: center; height: 28px; }
.light-circle { width: 22px; height: 22px; border-radius: 50%; border: 2px solid rgba(255,255,255,0.2); box-shadow: 0 0 8px currentColor; }
.colregs-info { padding: 14px; border-left: 1px solid var(--border); display: flex; flex-direction: column; justify-content: center; }
.colregs-rule-text { font-size: 0.82rem; color: var(--text2); line-height: 1.6; margin-bottom: 10px; }
.colregs-action { background: var(--bg3); padding: 8px 10px; border-radius: var(--radius-sm); font-size: 0.82rem; font-weight: 600; }
.colregs-action.give-way { color: var(--orange); border-left: 3px solid var(--orange); }
.colregs-action.stand-on { color: var(--green); border-left: 3px solid var(--green); }
.colregs-action.both { color: var(--accent); border-left: 3px solid var(--accent); }
.colregs-vessel-labels { display: flex; gap: 6px; margin-top: 6px; }
.vessel-label { font-size: 0.72rem; padding: 2px 8px; border-radius: 10px; }

/* ══════════════════════════════════════
   GLOSSARY
══════════════════════════════════════ */
.glossary-controls { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.glossary-controls h2 { color: var(--accent); font-size: 1.1rem; }
.glossary-langs { display: flex; gap: 5px; flex-wrap: wrap; }
.gloss-lang-btn { padding: 3px 9px; border-radius: 20px; border: 1px solid var(--border2); background: var(--surface2); color: var(--text2); font-size: 0.76rem; cursor: pointer; transition: all 0.15s; font-family: var(--font); }
.gloss-lang-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: 700; }
.glossary-table-wrap { overflow-x: auto; border-radius: var(--radius); }
.glossary-table { width: 100%; border-collapse: collapse; font-size: 0.83rem; background: var(--surface); }
.glossary-table th { background: var(--bg3); color: var(--accent); padding: 9px 12px; text-align: left; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.8px; border-bottom: 2px solid var(--border2); white-space: nowrap; position: sticky; top: 0; }
.glossary-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); vertical-align: top; line-height: 1.4; }
.glossary-table tr:hover td { background: var(--surface2); cursor: pointer; }
.glossary-table tr:last-child td { border-bottom: none; }
.gloss-cat-badge { display: inline-block; padding: 2px 7px; border-radius: 10px; font-size: 0.68rem; font-weight: 700; text-transform: uppercase; }
.gloss-main-word { font-weight: 600; color: var(--text); }

/* ══════════════════════════════════════
   QUIZ
══════════════════════════════════════ */
.quiz-wrap { max-width: 680px; margin: 0 auto; }
.quiz-setup h2 { color: var(--accent); margin-bottom: 20px; font-size: 1.3rem; }
.quiz-options { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 14px; margin-bottom: 24px; }
.quiz-option-group { display: flex; flex-direction: column; gap: 5px; }
.quiz-option-group label { font-size: 0.76rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; }
.quiz-option-group input[type="number"] { background: var(--surface2); border: 1px solid var(--border); color: var(--text); padding: 7px 10px; border-radius: var(--radius-sm); font-size: 0.88rem; font-family: var(--font); width: 100%; }
.btn-primary { background: var(--accent); color: var(--bg); border: none; padding: 9px 26px; border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 700; cursor: pointer; transition: all 0.2s; font-family: var(--font); }
.btn-primary:hover { background: var(--accent3); transform: translateY(-1px); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border2); padding: 9px 26px; border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 600; cursor: pointer; transition: all 0.2s; font-family: var(--font); }
.btn-secondary:hover { background: var(--bg4); border-color: var(--accent); }
.quiz-progress { margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.quiz-progress-bar { flex: 1; height: 5px; background: var(--bg3); border-radius: 3px; overflow: hidden; }
.quiz-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--gold)); transition: width 0.4s ease; }
#q-progress-text { font-size: 0.8rem; color: var(--text3); white-space: nowrap; }
.quiz-score-bar { display: flex; gap: 18px; margin-bottom: 18px; font-size: 0.95rem; font-weight: 700; }
.quiz-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.quiz-cat-badge { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; font-weight: 700; padding: 2px 9px; border-radius: 20px; display: inline-block; margin-bottom: 8px; }
.quiz-question-langs { font-size: 0.8rem; color: var(--text3); margin-bottom: 14px; }
.quiz-question { font-size: 1.4rem; font-weight: 700; margin-bottom: 20px; line-height: 1.3; }
.quiz-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.choice-btn { background: var(--surface2); border: 2px solid var(--border); color: var(--text); padding: 11px 14px; border-radius: var(--radius); cursor: pointer; text-align: left; font-size: 0.88rem; line-height: 1.4; transition: all 0.2s; font-family: var(--font); }
.choice-btn:hover:not(:disabled) { border-color: var(--accent); background: var(--bg4); }
.choice-btn.correct { border-color: var(--green); background: rgba(102,187,106,0.15); color: var(--green); }
.choice-btn.wrong { border-color: var(--red); background: rgba(239,83,80,0.15); color: var(--red); }
.choice-btn:disabled { cursor: default; }
.quiz-input-wrap { display: flex; gap: 10px; align-items: center; }
.quiz-text-input { flex: 1; background: var(--surface2); border: 2px solid var(--border); color: var(--text); padding: 9px 12px; border-radius: var(--radius-sm); font-size: 0.95rem; font-family: var(--font); outline: none; }
.quiz-text-input:focus { border-color: var(--accent); }
.quiz-text-input.correct { border-color: var(--green); }
.quiz-text-input.wrong { border-color: var(--red); }
.quiz-feedback { margin-top: 14px; padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600; display: none; }
.quiz-feedback.correct { background: rgba(102,187,106,0.15); color: var(--green); border: 1px solid var(--green); display: block; }
.quiz-feedback.wrong { background: rgba(239,83,80,0.15); color: var(--red); border: 1px solid var(--red); display: block; }
.btn-next { margin-top: 16px; background: var(--gold); color: var(--bg); border: none; padding: 10px 24px; border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 700; cursor: pointer; transition: all 0.2s; font-family: var(--font); display: block; width: 100%; }
.btn-next:hover { background: var(--gold2); }
.quiz-result { text-align: center; padding: 36px 16px; }
.result-icon { font-size: 3.5rem; margin-bottom: 14px; }
.quiz-result h2 { font-size: 1.5rem; color: var(--accent); margin-bottom: 10px; }
.result-score { font-size: 2.4rem; font-weight: 900; color: var(--gold); margin: 16px 0; }
.result-details { color: var(--text2); font-size: 0.88rem; margin-bottom: 24px; }
.result-actions { display: flex; gap: 10px; justify-content: center; }

/* ══════════════════════════════════════
   COMPASS PAGE
══════════════════════════════════════ */
.compass-layout { display: grid; grid-template-columns: auto 1fr; gap: 28px; margin-bottom: 28px; align-items: start; }
.compass-wrap h2 { color: var(--accent); margin-bottom: 14px; font-size: 1.1rem; }
#compass-canvas { display: block; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); cursor: pointer; }
.wind-info-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; min-height: 180px; }
.wind-info-panel h3 { color: var(--text3); font-size: 0.95rem; margin-bottom: 10px; }
.wind-detail-title { font-size: 1.25rem; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.wind-detail-desc { font-size: 0.87rem; color: var(--text2); line-height: 1.7; margin-bottom: 14px; }
.wind-translations { display: grid; grid-template-columns: auto 1fr; gap: 5px 10px; font-size: 0.83rem; }
.wind-lang { color: var(--text3); font-size: 0.72rem; font-weight: 600; text-transform: uppercase; }
.beaufort-section h3 { color: var(--text); margin-bottom: 12px; font-size: 0.95rem; }
.beaufort-scale { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 7px; }
.beaufort-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 9px 10px; border-left: 4px solid var(--accent); }
.beaufort-num { font-size: 1.3rem; font-weight: 900; color: var(--accent); }
.beaufort-name { font-size: 0.76rem; color: var(--text); font-weight: 600; }
.beaufort-speed { font-size: 0.72rem; color: var(--text2); }
.beaufort-desc { font-size: 0.72rem; color: var(--text2); margin-top: 2px; }

/* ══════════════════════════════════════
   MODAL / TOAST / SCROLLBAR
══════════════════════════════════════ */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 20px; }
.modal { background: var(--surface); border: 1px solid var(--border2); border-radius: var(--radius-lg); padding: 26px; max-width: 580px; width: 100%; position: relative; max-height: 80vh; overflow-y: auto; }
.modal-close { position: absolute; top: 12px; right: 12px; background: var(--bg3); border: 1px solid var(--border); color: var(--text2); width: 26px; height: 26px; border-radius: 50%; cursor: pointer; font-size: 0.82rem; display: flex; align-items: center; justify-content: center; }
.modal-close:hover { background: var(--red); color: white; }
.toast { position: fixed; bottom: 22px; right: 22px; background: var(--surface); border: 1px solid var(--border2); border-radius: var(--radius); padding: 10px 16px; font-size: 0.85rem; color: var(--text); box-shadow: 0 4px 20px var(--shadow); z-index: 2000; animation: toastIn 0.3s ease; max-width: 280px; }
.toast.success { border-color: var(--green); }
.toast.error { border-color: var(--red); }
@keyframes toastIn { from { opacity:0; transform: translateY(16px); } to { opacity:1; transform: translateY(0); } }
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ══════════════════════════════════════
   VESSEL TYPE SELECTOR
══════════════════════════════════════ */
.vessel-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.vessel-tab { background: var(--surface2); border: 1px solid var(--border); color: var(--text2); padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 0.84rem; font-family: var(--font); transition: all 0.2s; }
.vessel-tab:hover { background: var(--bg4); color: var(--text); border-color: var(--border2); }
.vessel-tab.active { background: var(--accent); color: #0d1b2a; border-color: var(--accent); font-weight: 700; }

/* Vessel 2D canvas wrapper — same grid slot as ship3d-wrap */
.vessel-2d-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; grid-column: 1; grid-row: 1; }
.ship3d-wrap { grid-column: 1; grid-row: 1; }
#info-panel { grid-column: 2; grid-row: 1; }
.vessel-canvas-hdr { padding: 9px 14px; background: var(--bg3); border-bottom: 1px solid var(--border); font-size: 0.8rem; color: var(--text3); }
.vessel-2d-wrap canvas { display: block; max-width: 100%; height: auto !important; cursor: crosshair; flex: 1; }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media (max-width: 1000px) {
  .ship3d-layout { grid-template-columns: 1fr; }
  .courses-layout { grid-template-columns: 1fr; }
  .compass-layout { grid-template-columns: 1fr; }
  .colregs-card-body { grid-template-columns: 1fr; }
  .quiz-choices { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .colregs-scenarios { grid-template-columns: 1fr; }
  .logo-text { display: none; }
  .header-inner { gap: 8px; }
  .nav-btn { white-space: nowrap; flex-shrink: 0; font-size: 0.78rem; padding: 4px 9px; }
}