@import"https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&display=swap";:root{--bg-base: #0b0f19;--bg-surface: #1e293b;--bg-surface-hover: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-primary: #3b82f6;--accent-primary-hover: #2563eb;--success-base: #10b981;--success-surface: rgba(16, 185, 129, .15);--error-base: #ef4444;--error-surface: rgba(239, 68, 68, .15);--border-light: rgba(255, 255, 255, .1);--font-main: "Outfit", sans-serif;--shadow-glow: 0 0 20px rgba(59, 130, 246, .5);--glass-bg: rgba(30, 41, 59, .7);--glass-blur: blur(12px);--radius-md: 12px;--radius-lg: 20px;--radius-full: 9999px;--transition-fast: .15s ease-in-out;--transition-normal: .25s ease-in-out}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--bg-base);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;display:flex;flex-direction:column}.glass-panel{background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border-light);border-radius:var(--radius-lg);box-shadow:0 8px 32px #0000004d}.button-base{font-family:var(--font-main);font-weight:600;border:none;cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;justify-content:center;gap:8px}.button-primary{background-color:var(--accent-primary);color:#fff;padding:12px 24px;border-radius:var(--radius-full);font-size:1rem}.button-primary:hover{background-color:var(--accent-primary-hover);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.button-primary:active{transform:translateY(0)}.screen-container{flex:1;display:flex;flex-direction:column;padding:24px;max-width:800px;margin:0 auto;width:100%}h1,h2,h3{font-weight:700;line-height:1.2}p{line-height:1.6}@keyframes slideDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}.animate-slide-down{animation:slideDown .3s cubic-bezier(.16,1,.3,1) forwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.animate-fade-in{animation:fadeIn .4s ease-out forwards}.return-link{position:absolute;top:24px;left:24px;z-index:50;display:flex;align-items:center;text-decoration:none;transition:all var(--transition-fast)}.return-link:hover{transform:translateY(-2px) scale(1.02);filter:drop-shadow(0 4px 12px rgba(59,130,246,.3))}.return-logo{height:48px;width:auto;object-fit:contain}.directory-screen{gap:32px}.directory-header{text-align:center;margin-top:20px}.directory-header h1{font-size:2.5rem;margin-bottom:8px;background:linear-gradient(135deg,#fff,#94a3b8);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.subtitle{color:var(--text-secondary);font-size:1.1rem}.directory-actions{display:flex;justify-content:center;gap:16px}.sets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;width:100%}.empty-state{grid-column:1 / -1;text-align:center;padding:40px;color:var(--text-secondary);border-style:dashed}.set-card{padding:24px;display:flex;flex-direction:column;gap:20px;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.set-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px #0006;border-color:#fff3}.set-info h3{font-size:1.25rem;margin-bottom:4px;color:var(--text-primary)}.question-count{font-size:.9rem;color:var(--text-secondary)}.set-actions{display:flex;gap:12px;margin-top:auto}.action-btn{background:#ffffff0d;border:1px solid var(--border-light);color:var(--text-primary);border-radius:var(--radius-md);padding:8px;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;flex:1}.action-btn:hover{background:#ffffff1a}.play-btn{flex:2;background:#3b82f633;border-color:#3b82f64d;color:#60a5fa}.play-btn:hover{background:var(--accent-primary);color:#fff;box-shadow:var(--shadow-glow)}.delete-btn:hover{background:var(--error-base);border-color:var(--error-base)}.quiz-screen{min-height:100vh;display:flex;flex-direction:column;position:relative;background-color:var(--bg-base)}.empty-quiz{align-items:center;justify-content:center;text-align:center}.empty-quiz .glass-panel{padding:40px}.feedback-banner{position:fixed;top:0;left:0;right:0;padding:20px;display:flex;align-items:center;justify-content:center;gap:12px;font-size:1.5rem;font-weight:700;z-index:100;box-shadow:0 4px 20px #0000004d}.feedback-banner.correct{background-color:var(--success-base);color:#fff}.feedback-banner.incorrect{background-color:var(--error-base);color:#fff}.explanation-btn{background:none;border:none;color:#fff;cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background var(--transition-fast)}.explanation-btn:hover{background:#fff3}.quiz-header{display:flex;align-items:center;padding:24px;max-width:800px;margin:0 auto;width:100%}.back-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:var(--radius-full);transition:all var(--transition-fast);display:flex;align-items:center}.back-btn:hover{background:#ffffff1a;color:var(--text-primary)}.progress{flex:1;text-align:center;font-weight:600;color:var(--text-secondary)}.quiz-main{flex:1;display:flex;flex-direction:column;max-width:800px;margin:0 auto;width:100%;padding:20px 24px 100px}.question-card{margin-bottom:40px;text-align:center}.question-text{font-size:2rem;color:var(--text-primary);line-height:1.4}.explanation-text{margin-top:24px;padding:16px;background:var(--bg-surface);border-radius:var(--radius-lg);border-left:4px solid var(--accent-primary);font-size:1.1rem;line-height:1.5;color:var(--text-secondary);text-align:left}.answers-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:auto}@media (min-width: 600px){.answers-grid{grid-template-columns:1fr 1fr}}.answer-btn{background:var(--bg-surface);border:2px solid var(--border-light);color:var(--text-primary);padding:24px;font-size:1.25rem;border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);text-align:left;font-family:var(--font-main);box-shadow:0 4px 12px #0000001a;position:relative}.answer-number{position:absolute;top:8px;left:8px;font-size:.8rem;color:var(--text-secondary);background:#ffffff1a;border-radius:50%;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-weight:700}.answer-btn:not(.is-disabled):hover{background:var(--bg-surface-hover);border-color:#ffffff4d;transform:translateY(-2px)}.answer-btn:not(.is-disabled):active{transform:translateY(1px)}.answer-btn.selected{border-color:var(--accent-primary);background:#3b82f61a;box-shadow:0 0 15px #3b82f64d}.answer-btn.correct{background:var(--success-base);border-color:var(--success-base);color:#fff;box-shadow:0 0 20px #10b98166}.answer-btn.incorrect{background:var(--error-base);border-color:var(--error-base);color:#fff}.answer-btn.dim{opacity:.4;filter:grayscale(1)}.multiple-submit-container{margin-top:32px;display:flex;justify-content:center}.multiple-submit-container .button-primary{padding:16px 40px;font-size:1.2rem;background:var(--bg-surface);color:var(--text-secondary)}.multiple-submit-container .button-primary.ready{background:var(--accent-primary);color:#fff}.tap-to-continue{position:fixed;bottom:40px;left:0;right:0;text-align:center;font-size:1.2rem;color:var(--text-secondary);font-weight:500;animation:pulse 2s infinite;pointer-events:none}@keyframes pulse{0%{opacity:.5}50%{opacity:1}to{opacity:.5}}