:root{--bg-primary:#0a0a0b;--bg-secondary:#121214;--bg-tertiary:#1a1a1e;--bg-elevated:#ffffff08;--bg-elevated-hover:#ffffff14;--accent-primary:#6366f1;--accent-secondary:#8b5cf6;--accent-tertiary:#d946ef;--accent-glow:#6366f14d;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-tertiary:#64748b;--success:#10b981;--success-bg:#10b9811a;--warning:#f59e0b;--warning-bg:#f59e0b1a;--danger:#ef4444;--danger-bg:#ef44441a;--border-subtle:#ffffff14;--border-hover:#ffffff26;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--shadow-sm:0 1px 2px #00000080;--shadow-md:0 4px 6px -1px #00000080, 0 2px 4px -1px #0000004d;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -2px #0000004d;--shadow-glow:0 0 20px var(--accent-glow);--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-normal:.3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}a{color:var(--accent-primary);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--accent-secondary)}button{cursor:pointer;background:0 0;border:none;outline:none;font-family:inherit}.app-container{width:100%;min-height:100vh;display:flex}.main-content{flex-direction:column;flex:1;width:100%;max-width:1200px;margin:0 auto;padding:2rem;display:flex}@media (width<=768px){.main-content{padding:1rem}}.glass-panel{background:var(--bg-elevated);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);transition:all var(--transition-normal);padding:1.5rem}.glass-panel:hover{border-color:var(--border-hover)}.text-gradient{background:linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.text-gradient-secondary{background:linear-gradient(135deg, var(--accent-secondary), var(--success));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.btn{border-radius:var(--radius-full);transition:all var(--transition-fast);justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));color:#fff;box-shadow:0 4px 15px var(--accent-glow)}.btn-primary:hover{box-shadow:0 6px 20px var(--accent-glow);filter:brightness(1.1);transform:translateY(-2px)}.btn-primary:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none;filter:grayscale(.3)}.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border-subtle)}.btn-secondary:hover{background:var(--bg-elevated-hover);border-color:var(--border-hover)}.btn-icon{border-radius:var(--radius-full);background:var(--bg-elevated);color:var(--text-secondary);border:1px solid var(--border-subtle);transition:all var(--transition-fast);justify-content:center;align-items:center;padding:.5rem;display:flex}.btn-icon:hover{background:var(--bg-elevated-hover);color:var(--text-primary);border-color:var(--border-hover)}.input-field{background:var(--bg-tertiary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);width:100%;color:var(--text-primary);transition:all var(--transition-fast);padding:1rem 1.25rem;font-family:inherit;font-size:1rem}.input-field:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.input-field::placeholder{color:var(--text-tertiary)}select.input-field{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23cbd5e1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;background-size:1em}.badge{border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.05em;align-items:center;padding:.25rem .75rem;font-size:.75rem;font-weight:600;display:inline-flex}.badge-success{background:var(--success-bg);color:var(--success)}.badge-warning{background:var(--warning-bg);color:var(--warning)}.badge-danger{background:var(--danger-bg);color:var(--danger)}.badge-primary{color:var(--accent-primary);background:#6366f11a}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-subtle);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}.flex-row{align-items:center;gap:1rem;display:flex}.flex-col{flex-direction:column;gap:1rem;display:flex}.justify-between{justify-content:space-between}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.w-full{width:100%}.text-center{text-align:center}.reading-word{cursor:pointer;border-radius:4px;margin:0 .1rem;padding:.1rem .2rem;transition:all .2s;display:inline-block}.reading-word:hover{background:var(--accent-glow);color:var(--accent-primary)}.reading-word.active{background:var(--accent-primary);color:#fff}.reading-word.known{border-bottom:2px solid var(--success)}.reading-word.learning{border-bottom:2px solid var(--warning)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translate(-100%)}to{transform:translate(0)}}.mobile-header{z-index:40;background:var(--bg-secondary);border-bottom:1px solid var(--border-subtle);justify-content:space-between;align-items:center;height:56px;padding:0 1rem;display:none;position:fixed;top:0;left:0;right:0}.mobile-menu-toggle{color:var(--text-primary);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;min-width:44px;min-height:44px;padding:.5rem;display:flex}.mobile-menu-close{display:none}.sidebar-desktop{background-color:var(--bg-secondary);border-right:1px solid var(--border-subtle);z-index:10;flex-direction:column;flex-shrink:0;width:280px;padding:1.5rem;display:flex}.sidebar-mobile-overlay{display:none}@media (width<=768px){.mobile-header{display:flex}.mobile-menu-close{display:block}.sidebar-desktop{display:none}.sidebar-mobile-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:50;background:#000000b3;display:block;position:fixed;inset:0}.sidebar-mobile{background-color:var(--bg-secondary);flex-direction:column;width:300px;max-width:85vw;height:100%;padding:1.5rem;animation:.2s ease-out slideIn;display:flex;overflow-y:auto}.app-container{flex-direction:column}.main-content{max-width:100%;padding:calc(56px + 1rem) 1rem 1rem}.glass-panel{padding:1rem}.btn{min-height:44px;padding:.75rem 1.25rem}.input-field{min-height:44px;font-size:16px}.stats-grid{grid-template-columns:1fr 1fr!important}.reading-word{padding:.2rem .3rem;font-size:1.1rem}h1{font-size:1.5rem!important}h2{font-size:1.25rem!important}#highlight-popover{max-height:40vh;overflow-y:auto;border-radius:var(--radius-lg) var(--radius-lg) 0 0!important;width:100%!important;position:fixed!important;inset:auto 0 0!important;transform:none!important}}@media (width>=769px) and (width<=1024px){.sidebar-desktop{width:220px;padding:1rem}.main-content{padding:1.5rem}}