:root{--navy-950: #050d18;--navy-900: #0a192f;--navy-800: #0f2744;--navy-700: #1a365d;--navy-600: #2a4365;--accent-cyan: #00d4b2;--accent-cyan-dark: #00b396;--accent-cyan-light: #e6faf7;--accent-magenta: #e11d48;--accent-magenta-light: #fff1f2;--accent-purple: #6366f1;--accent-purple-light: #eef2ff;--accent-emerald: #10b981;--accent-emerald-light: #ecfdf5;--accent-amber: #f59e0b;--accent-amber-light: #fffbeb;--slate-50: #f8fafc;--slate-100: #f1f5f9;--slate-200: #e2e8f0;--slate-300: #cbd5e1;--slate-400: #94a3b8;--slate-500: #64748b;--slate-600: #475569;--slate-700: #334155;--slate-800: #1e293b;--slate-900: #0f172a;--font-heading: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;--font-body: "Plus Jakarta Sans", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .03);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .05);--shadow-glow: 0 0 20px rgba(0, 212, 178, .25);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-body);background-color:var(--slate-50);color:var(--slate-800);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;display:flex;flex-direction:column}#root{min-height:100vh;display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--navy-900);font-weight:700;line-height:1.25}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;border:none;background:none}input,select,textarea{font-family:inherit}.app-container{width:100%;max-width:1280px;margin:0 auto;padding:0 1.5rem}.main-content{flex:1;padding-bottom:4rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-weight:600;font-size:.95rem;padding:.75rem 1.4rem;border-radius:var(--radius-md);transition:all var(--transition-normal);text-decoration:none;white-space:nowrap}.btn:active{transform:scale(.98)}.btn-primary{background:linear-gradient(135deg,var(--accent-cyan) 0%,#00b396 100%);color:#062428;font-weight:700;box-shadow:0 4px 14px #00d4b259}.btn-primary:hover{background:linear-gradient(135deg,#15e2c2,#00c7a7);box-shadow:0 6px 20px #00d4b273;transform:translateY(-1px)}.btn-navy{background:var(--navy-900);color:#fff;box-shadow:var(--shadow-md)}.btn-navy:hover{background:var(--navy-800);transform:translateY(-1px)}.btn-outline{border:2px solid var(--slate-200);background:#fff;color:var(--slate-700)}.btn-outline:hover{border-color:var(--slate-400);background:var(--slate-50)}.btn-magenta{background:var(--accent-magenta);color:#fff}.btn-magenta:hover{background:#be123c}.btn-sm{padding:.45rem .85rem;font-size:.85rem;border-radius:var(--radius-sm)}.btn-lg{padding:.95rem 2rem;font-size:1.05rem;border-radius:var(--radius-lg)}.level-badge{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .65rem;border-radius:var(--radius-full);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}.level-badge-a1{background-color:#d1fae5;color:#065f46;border:1px solid #a7f3d0}.level-badge-a2{background-color:#cffafe;color:#155e75;border:1px solid #a5f3fc}.level-badge-b1{background-color:#dbeafe;color:#1e40af;border:1px solid #bfdbfe}.level-badge-b2{background-color:#ede9fe;color:#5b21b6;border:1px solid #ddd6fe}.level-badge-c1{background-color:#fef3c7;color:#92400e;border:1px solid #fde68a}.navbar{background:var(--navy-900);color:#fff;position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 4px 20px #0003}.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:72px}.brand-logo{display:flex;align-items:center;gap:.75rem;font-family:var(--font-heading);font-size:1.35rem;font-weight:800;color:#fff;letter-spacing:-.02em}.brand-icon-box{width:42px;height:42px;background:linear-gradient(135deg,var(--accent-cyan) 0%,#0284c7 100%);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#051d24;box-shadow:0 0 15px #00d4b266}.nav-links{display:flex;align-items:center;gap:.5rem}.nav-pill{padding:.5rem .9rem;border-radius:var(--radius-full);font-size:.9rem;font-weight:600;color:var(--slate-300);transition:all var(--transition-fast)}.nav-pill:hover{color:#fff;background:#ffffff14}.nav-pill.active{color:#062228;background:var(--accent-cyan);box-shadow:0 0 12px #00d4b259}.hero-banner{background:linear-gradient(135deg,var(--navy-950) 0%,var(--navy-900) 50%,#0d2847 100%);color:#fff;padding:4.5rem 0 3.5rem;position:relative;overflow:hidden}.hero-banner:before{content:"";position:absolute;top:-20%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,#00d4b226,#0000 70%);pointer-events:none}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:3rem;align-items:center}.hero-tag{display:inline-flex;align-items:center;gap:.5rem;background:#00d4b21f;border:1px solid rgba(0,212,178,.3);color:var(--accent-cyan);padding:.35rem .85rem;border-radius:var(--radius-full);font-size:.85rem;font-weight:700;margin-bottom:1.25rem}.hero-title{font-size:3.2rem;font-weight:800;line-height:1.15;color:#fff;margin-bottom:1.25rem}.hero-highlight{background:linear-gradient(135deg,#00d4b2,#38bdf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-desc{font-size:1.15rem;color:var(--slate-300);line-height:1.6;margin-bottom:2rem;max-width:580px}.hero-stats-row{display:flex;gap:2rem;margin-top:2rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}.hero-stat-item h4{font-size:1.8rem;color:#fff;font-weight:800}.hero-stat-item p{font-size:.85rem;color:var(--slate-400);text-transform:uppercase;letter-spacing:.05em}.lessons-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.75rem;margin-top:2rem}.lesson-card{background:#fff;border-radius:var(--radius-lg);border:1px solid var(--slate-200);overflow:hidden;transition:all var(--transition-normal);display:flex;flex-direction:column;position:relative;box-shadow:var(--shadow-sm)}.lesson-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:#00d4b266}.lesson-card-header{padding:1.5rem 1.5rem 1rem;display:flex;align-items:center;justify-content:space-between}.lesson-card-body{padding:0 1.5rem 1.5rem;flex:1;display:flex;flex-direction:column}.lesson-card-title{font-size:1.25rem;font-weight:700;color:var(--navy-900);margin-bottom:.6rem;transition:color var(--transition-fast)}.lesson-card:hover .lesson-card-title{color:#0284c7}.lesson-card-desc{font-size:.92rem;color:var(--slate-600);line-height:1.55;margin-bottom:1.5rem;flex:1}.lesson-card-footer{display:flex;align-items:center;justify-content:space-between;padding-top:1rem;border-top:1px solid var(--slate-100)}.audio-player-card{background:linear-gradient(145deg,var(--navy-900) 0%,var(--navy-950) 100%);color:#fff;border-radius:var(--radius-xl);padding:2rem;box-shadow:var(--shadow-xl);border:1px solid rgba(255,255,255,.08);margin-bottom:2.5rem;position:relative;overflow:hidden}.audio-header-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}.audio-track-info h3{color:#fff;font-size:1.3rem;margin-bottom:.25rem}.audio-track-info p{color:var(--slate-400);font-size:.85rem}.waveform-container{display:flex;align-items:center;gap:4px;height:40px;margin:1.25rem 0;padding:0 .5rem}.waveform-bar{flex:1;background:#fff3;border-radius:4px;min-height:6px;transition:height .2s ease,background-color .2s ease}.waveform-bar.active{background:var(--accent-cyan)}.waveform-bar.playing{animation:pulseWave 1s infinite ease-in-out alternate}@keyframes pulseWave{0%{transform:scaleY(.4)}to{transform:scaleY(1.3)}}.audio-controls-row{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;margin-top:1.25rem}.play-btn-circle{width:58px;height:58px;border-radius:50%;background:linear-gradient(135deg,var(--accent-cyan) 0%,#00b396 100%);color:#062428;display:flex;align-items:center;justify-content:center;box-shadow:0 0 20px #00d4b273;transition:transform var(--transition-fast)}.play-btn-circle:hover{transform:scale(1.08)}.audio-scrubber-bar{width:100%;height:6px;-webkit-appearance:none;background:#fff3;border-radius:3px;outline:none;cursor:pointer}.audio-scrubber-bar::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent-cyan);box-shadow:0 0 10px #00d4b2cc;cursor:pointer}.transcript-card{background:#fff;border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:1.75rem;margin-bottom:2.5rem}.transcript-line{display:flex;gap:1rem;padding:.85rem 1rem;border-radius:var(--radius-md);margin-bottom:.5rem;transition:background-color var(--transition-fast)}.transcript-line:hover{background-color:var(--slate-100)}.transcript-time{font-family:monospace;font-size:.85rem;color:var(--slate-500);background:var(--slate-200);padding:.15rem .45rem;border-radius:4px;height:fit-content}.transcript-speaker{font-weight:700;color:var(--navy-900);min-width:90px}.transcript-text{color:var(--slate-700);font-size:1.02rem;line-height:1.6}.quiz-card{background:#fff;border:1px solid var(--slate-200);border-radius:var(--radius-xl);padding:2.25rem;margin-bottom:2.5rem;box-shadow:var(--shadow-sm)}.quiz-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;padding-bottom:1.25rem;border-bottom:1px solid var(--slate-200)}.quiz-question-item{background:var(--slate-50);border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem}.question-text{font-size:1.1rem;font-weight:600;color:var(--navy-900);margin-bottom:1rem}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.75rem}.option-btn{display:flex;align-items:center;gap:.75rem;padding:.85rem 1.25rem;background:#fff;border:2px solid var(--slate-200);border-radius:var(--radius-md);font-size:.95rem;font-weight:500;color:var(--slate-700);text-align:left;transition:all var(--transition-fast)}.option-btn:hover{border-color:var(--navy-700);background:var(--slate-100)}.option-btn.selected{border-color:var(--navy-900);background:#f0f4f8;font-weight:700;color:var(--navy-900)}.option-btn.correct{border-color:var(--accent-emerald)!important;background:#ecfdf5!important;color:#065f46!important}.option-btn.incorrect{border-color:var(--accent-magenta)!important;background:#fff1f2!important;color:#9f1239!important}.quiz-explanation-box{margin-top:1rem;padding:.85rem 1rem;border-radius:var(--radius-sm);font-size:.9rem;line-height:1.5}.quiz-explanation-box.correct{background:#d1fae5;color:#065f46;border:1px solid #a7f3d0}.quiz-explanation-box.incorrect{background:#ffe4e6;color:#9f1239;border:1px solid #fecdd3}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a192fbf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:100;padding:1.5rem;animation:fadeIn .2s ease-out}.modal-card{background:#fff;border-radius:var(--radius-xl);max-width:520px;width:100%;padding:2.5rem;box-shadow:0 25px 50px -12px #00000040;position:relative;animation:scaleUp .25s cubic-bezier(.16,1,.3,1)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleUp{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-size:.9rem;font-weight:600;color:var(--slate-700);margin-bottom:.45rem}.form-input,.form-select,.form-textarea{width:100%;padding:.8rem 1rem;border:1.5px solid var(--slate-300);border-radius:var(--radius-md);font-size:.95rem;color:var(--slate-900);background:#fff;outline:none;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent-cyan);box-shadow:0 0 0 3px #00d4b233}.admin-layout{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 72px)}.admin-sidebar{background:var(--navy-950);color:#fff;padding:2rem 1.25rem;border-right:1px solid rgba(255,255,255,.08)}.admin-nav-item{display:flex;align-items:center;gap:.75rem;padding:.85rem 1rem;border-radius:var(--radius-md);font-size:.95rem;font-weight:600;color:var(--slate-300);margin-bottom:.4rem;transition:all var(--transition-fast)}.admin-nav-item:hover{background:#ffffff14;color:#fff}.admin-nav-item.active{background:var(--accent-cyan);color:#062428;font-weight:700}.admin-main{background:var(--slate-100);padding:2.5rem;overflow-y:auto}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem;margin-bottom:2rem}.stat-card{background:#fff;padding:1.5rem;border-radius:var(--radius-lg);border:1px solid var(--slate-200);box-shadow:var(--shadow-sm)}.table-responsive{overflow-x:auto;background:#fff;border-radius:var(--radius-lg);border:1px solid var(--slate-200);box-shadow:var(--shadow-sm)}.admin-table{width:100%;border-collapse:collapse;text-align:left}.admin-table th{background:var(--slate-50);padding:1rem 1.25rem;font-size:.85rem;font-weight:700;color:var(--slate-600);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--slate-200)}.admin-table td{padding:1.1rem 1.25rem;border-bottom:1px solid var(--slate-100);font-size:.92rem;color:var(--slate-700)}.admin-table tr:hover td{background-color:var(--slate-50)}@media (max-width: 960px){.hero-grid{grid-template-columns:1fr}.hero-title{font-size:2.5rem}.admin-layout{grid-template-columns:1fr}}