:root{--font-burmese:"Padauk", "Noto Sans Myanmar", sans-serif;--font-thai:"Sarabun", -apple-system, BlinkMacSystemFont, sans-serif;--font-sans:"Sarabun", "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--bg-primary:#f8fafc;--bg-surface:#fff;--bg-surface-elevated:#f1f5f9;--bg-glass:#ffffffd9;--border-color:#e2e8f0;--border-subtle:#edf2f7;--text-main:#0f172a;--text-muted:#64748b;--text-subtle:#94a3b8;--brand-gold:#f59e0b;--brand-gold-hover:#d97706;--brand-gold-glow:#f59e0b40;--brand-indigo:#6366f1;--brand-emerald:#10b981;--brand-rose:#f43f5e;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -1px #0000000a;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -2px #0000000a;--shadow-glow:0 0 20px var(--brand-gold-glow)}[data-theme=dark]{--bg-primary:#0b0f19;--bg-surface:#111827;--bg-surface-elevated:#1e293b;--bg-glass:#111827d9;--border-color:#334155;--border-subtle:#1e293b;--text-main:#f8fafc;--text-muted:#94a3b8;--text-subtle:#64748b;--brand-gold-glow:#f59e0b59;--shadow-sm:0 1px 3px 0 #0000004d;--shadow-md:0 4px 8px -1px #0006;--shadow-lg:0 12px 20px -4px #00000080}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.5;transition:background-color .25s,color .25s}.burmese-font{font-family:var(--font-burmese);line-height:1.6}.thai-font{font-family:var(--font-thai)}.glass-panel{background:var(--bg-glass);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:1rem}.app-container{max-width:1280px;margin:0 auto;padding:0 1rem 4rem}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.perspective-1000{perspective:1000px}.transform-style-3d{transform-style:preserve-3d}.backface-hidden{backface-visibility:hidden}.rotate-y-180{transform:rotateY(180deg)}.btn-gold{color:#fff;cursor:pointer;background:linear-gradient(135deg,#f59e0b,#d97706);border:none;border-radius:.75rem;justify-content:center;align-items:center;gap:.5rem;padding:.625rem 1.25rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex;box-shadow:0 4px 12px #f59e0b40}.btn-gold:hover{transform:translateY(-1px);box-shadow:0 6px 16px #f59e0b59}.btn-gold:active{transform:translateY(0)}.btn-secondary{background:var(--bg-surface-elevated);color:var(--text-main);border:1px solid var(--border-color);cursor:pointer;border-radius:.75rem;justify-content:center;align-items:center;gap:.5rem;padding:.625rem 1.25rem;font-weight:500;transition:all .2s;display:inline-flex}.btn-secondary:hover{background:var(--border-color);color:var(--text-main)}.card-hover{border:1px solid var(--border-color);transition:all .25s cubic-bezier(.4,0,.2,1)}.card-hover:hover{border-color:var(--brand-gold);box-shadow:0 8px 24px -4px #0000001f, 0 0 12px var(--brand-gold-glow);transform:translateY(-3px)}@keyframes goldPulse{0%,to{box-shadow:0 0 #f59e0b66}50%{box-shadow:0 0 0 8px #f59e0b00}}.gold-pulse{animation:2s infinite goldPulse}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;background-color:#000000a6;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.matrix-tile{background:var(--bg-surface);border:1.5px solid var(--border-color);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:.85rem;flex-direction:column;justify-content:center;align-items:center;padding:.75rem .5rem;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden}.matrix-tile:before{content:"";background:0 0;height:3px;transition:background .2s;position:absolute;top:0;left:0;right:0}.matrix-tile:hover{border-color:var(--brand-gold);background:var(--bg-surface-elevated);box-shadow:0 10px 20px -5px #f59e0b26, 0 0 12px var(--brand-gold-glow);z-index:2;transform:translateY(-3px)scale(1.02)}.matrix-tile:hover:before{background:var(--brand-gold)}.matrix-tile.is-playing{border-color:var(--brand-gold);z-index:3;background:#f59e0b14;transform:scale(1.03);box-shadow:0 0 0 3px #f59e0b59,0 0 20px #f59e0b4d}.matrix-tile.is-playing:before{background:var(--brand-gold)}@keyframes soundBars{0%,to{height:4px}50%{height:12px}}.sound-bar{background:var(--brand-gold);border-radius:2px;width:2.5px;animation:.6s ease-in-out infinite soundBars;display:inline-block}.sound-bar:nth-child(2){animation-delay:.2s}.sound-bar:nth-child(3){animation-delay:.4s}.speed-match-card{box-sizing:border-box;border:1.5px solid var(--border-color);background:var(--bg-surface-elevated);cursor:pointer;-webkit-user-select:none;user-select:none;height:72px;min-height:72px;max-height:72px;box-shadow:var(--shadow-sm);border-radius:.875rem;justify-content:space-between;align-items:center;padding:0 1rem;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden}.speed-match-card:hover:not(.is-matched){border-color:var(--card-hover-border,var(--brand-gold));background:var(--bg-surface);transform:translateY(-2px);box-shadow:0 8px 18px -3px #00000017}.speed-match-card.is-selected-char{transform:scale(1.015);border-color:var(--brand-gold)!important;background:#f59e0b1f!important;box-shadow:0 0 0 3px #f59e0b40,0 8px 20px -4px #f59e0b4d!important}.speed-match-card.is-selected-pron{transform:scale(1.015);border-color:var(--brand-indigo)!important;background:#6366f11f!important;box-shadow:0 0 0 3px #6366f140,0 8px 20px -4px #6366f14d!important}.speed-match-card.is-matched{opacity:.7;cursor:default;background:#10b98114!important;border-color:#10b98199!important}.three-tones-list{flex-direction:column;gap:1.25rem;display:flex}.tone-row-card{grid-template-columns:240px 1fr 200px;align-items:center;gap:1.5rem;display:grid}@media (width<=920px){.tone-row-card{grid-template-columns:1fr;gap:1.15rem}}@keyframes slideUp{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@media (width<=768px){.nav-subtitle{display:none!important}}@media (width<=520px){.nav-version-badge,.nav-btn-text{display:none!important}.app-container{padding-bottom:3.5rem!important;padding-left:.75rem!important;padding-right:.75rem!important}}.lessons-layout{grid-template-columns:minmax(280px,340px) 1fr;align-items:start;gap:1.5rem;display:grid}.lessons-sidebar-desktop{display:block}.lessons-mobile-nav-bar{display:none}.lesson-reader-panel{background:var(--bg-surface);border-radius:1.25rem;min-width:0;max-width:100%;min-height:600px;padding:2.25rem;overflow:hidden}.lesson-hero-card{margin-bottom:1.5rem;padding:1.5rem 1.75rem}.lesson-hero-title{font-size:1.75rem;font-weight:700}.lesson-main-title{font-size:2.1rem;font-weight:800;line-height:1.3}.lesson-section-box{padding:1.75rem}@media (width<=992px){.lessons-layout{flex-direction:column!important;gap:1rem!important;display:flex!important}.lessons-sidebar-desktop{display:none!important}.lessons-mobile-nav-bar{display:flex!important}.lesson-reader-panel{border-radius:1rem!important;padding:1.15rem!important}.lesson-hero-card{margin-bottom:1rem!important;padding:1rem 1.15rem!important}.lesson-hero-title{font-size:1.35rem!important}.lesson-main-title{font-size:1.45rem!important}.lesson-section-box{padding:1rem!important}}@media (width<=480px){.lesson-reader-panel{padding:.875rem!important}.lesson-main-title{font-size:1.25rem!important}}