:root{--bg: #f3faf6;--bg-gradient: radial-gradient(1200px 600px at 10% -10%, #d7f5e3 0%, transparent 60%), radial-gradient(1000px 500px at 100% 0%, #e7f9ee 0%, transparent 55%), #f3faf6;--surface: #ffffff;--surface-alt: #f0faf4;--text: #103324;--muted: #5c7568;--primary: #16a34a;--primary-dark: #0e7a38;--primary-light: #34d399;--accent: #059669;--danger: #e0475b;--success: #16a34a;--border: #d9ede1;--shadow: 0 1px 2px rgba(16, 51, 36, .04), 0 8px 24px rgba(16, 51, 36, .06);--shadow-hover: 0 4px 10px rgba(16, 51, 36, .08), 0 16px 32px rgba(16, 163, 74, .12);--radius: 16px;font-family:Segoe UI,system-ui,-apple-system,sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #0c1712;--bg-gradient: radial-gradient(1200px 600px at 10% -10%, #123322 0%, transparent 60%), radial-gradient(1000px 500px at 100% 0%, #0f2a1c 0%, transparent 55%), #0c1712;--surface: #12211a;--surface-alt: #16281f;--text: #eaf6ef;--muted: #8fae9d;--primary: #34d399;--primary-dark: #10b981;--primary-light: #6ee7b7;--accent: #34d399;--border: #1e3a2c;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);--shadow-hover: 0 4px 10px rgba(0, 0, 0, .35), 0 16px 32px rgba(52, 211, 153, .12)}}*{box-sizing:border-box}body{margin:0;background:var(--bg-gradient);background-attachment:fixed;color:var(--text)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;row-gap:8px;padding:14px 32px;background:color-mix(in srgb,var(--surface) 80%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.brand{font-size:1.3rem;font-weight:800;color:var(--primary-dark);text-decoration:none;display:flex;align-items:center;gap:8px;letter-spacing:-.02em}.brand-mark{font-size:1.4rem}.topbar nav{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:12px 18px;min-width:0}.topbar nav a:not(.btn),.link-button{color:var(--muted);text-decoration:none;font-weight:600;background:none;border:none;cursor:pointer;font-size:.95rem}.topbar nav a:not(.btn):hover,.link-button:hover{color:var(--primary-dark)}.topbar nav a.btn{text-decoration:none}.btn-nav{padding:8px 20px!important;color:#fff!important}.nav-greeting{color:var(--muted);font-size:.85rem;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.quiz-quota-badge{background:var(--surface-alt);color:var(--primary-dark);border:1px solid var(--border);padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:700}.main-content{flex:1;padding:40px 32px;max-width:920px;width:100%;margin:0 auto}.app-footer{text-align:center;padding:18px}.footer-link{color:var(--muted);font-size:.78rem;text-decoration:none;opacity:.6}.footer-link:hover{opacity:1;color:var(--primary-dark)}.home{text-align:center}.home h1{font-size:2.6rem;margin-bottom:4px;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,var(--primary-dark),var(--accent) 60%,var(--primary-light));-webkit-background-clip:text;background-clip:text;color:transparent}.subtitle{color:var(--muted);margin-bottom:28px;font-size:1.05rem}.quiz-settings{display:flex;flex-direction:column;gap:12px;align-items:center;margin-bottom:36px}.setting-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}.setting-group span{color:var(--muted);font-size:.9rem;margin-right:4px}.chip{padding:7px 16px;border-radius:999px;border:1px solid var(--border);background:var(--surface);cursor:pointer;font-size:.9rem;color:var(--text);transition:all .15s ease}.chip:hover{border-color:var(--primary)}.chip-active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent;box-shadow:0 4px 12px #16a34a40}.mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px}.mode-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px 16px;display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;text-align:center;box-shadow:var(--shadow)}.mode-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--primary)}.mode-icon{font-size:2.1rem}.mode-label{font-weight:800;font-size:1.1rem}.mode-desc{color:var(--muted);font-size:.82rem}.state-message{text-align:center;padding:60px 0;color:var(--muted);font-size:1.1rem}.state-message.error{color:var(--danger)}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.quiz-mode-badge{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;padding:4px 14px;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.02em}.quiz-progress{color:var(--muted);font-size:.9rem}.progress-bar{height:8px;background:var(--border);border-radius:999px;overflow:hidden;margin-bottom:36px}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-light));transition:width .3s ease;border-radius:999px}.quiz-word{text-align:center;font-size:2.5rem;margin:0 0 4px;font-weight:800;color:var(--primary-dark);letter-spacing:-.02em}.quiz-instruction{text-align:center;color:var(--muted);margin-bottom:28px}.options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.option-button{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-align:left;cursor:pointer;font-size:1rem;color:var(--text);box-shadow:var(--shadow);transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease}.option-button:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-hover)}.paywall{text-align:center;max-width:440px;margin:40px auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:40px 32px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;align-items:center}.paywall-icon{font-size:2.6rem}.paywall h2{margin:0}.paywall p{color:var(--muted);margin:0 0 8px}.coffee-card{display:flex;flex-direction:column;align-items:center;gap:10px;background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius);padding:20px;width:100%}.coffee-qr{width:180px;height:180px;border-radius:8px;background:#fff;padding:8px}.coffee-upi-row{display:flex;align-items:center;gap:10px}.coffee-upi-id{background:var(--surface);border:1px solid var(--border);padding:6px 12px;border-radius:8px;font-size:.95rem;font-weight:700;color:var(--primary-dark)}.btn-large{padding:14px 28px;font-size:1.05rem;width:100%}.results h2{text-align:center}.score-summary{display:flex;flex-direction:column;align-items:center;margin-bottom:28px}.score-big{font-size:3.2rem;font-weight:800;background:linear-gradient(135deg,var(--primary-dark),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}.score-pct{color:var(--muted)}.results-list{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.result-row{border:1px solid var(--border);border-left:5px solid var(--border);border-radius:var(--radius);padding:14px 18px;background:var(--surface);box-shadow:var(--shadow)}.result-row.correct{border-left-color:var(--success)}.result-row.incorrect{border-left-color:var(--danger)}.result-row-header{display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:1.05rem}.result-definition{margin:6px 0 0}.result-example{color:var(--muted);font-style:italic;margin:4px 0 0}.result-your-answer{color:var(--danger);margin:6px 0 0;font-size:.9rem}.btn{padding:10px 18px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font-size:.95rem;transition:transform .1s ease,box-shadow .15s ease}.btn:hover{box-shadow:var(--shadow)}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent;box-shadow:0 4px 14px #16a34a4d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px #16a34a66}.btn-secondary{background:var(--surface-alt);color:var(--primary-dark);border-color:transparent}.btn-danger{color:var(--danger);border-color:var(--danger);background:transparent}.btn-small{padding:5px 10px;font-size:.82rem;margin-right:6px}.btn:disabled{opacity:.6;cursor:not-allowed}.auth-form-wrapper{display:flex;justify-content:center;padding-top:40px}.auth-form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;gap:14px;width:100%;max-width:360px;box-shadow:var(--shadow)}.auth-form h2{margin:0 0 8px;text-align:center}.auth-toggle{display:flex;background:var(--surface-alt);border-radius:999px;padding:4px;margin-bottom:8px}.auth-toggle-btn{flex:1;border:none;background:transparent;padding:8px;border-radius:999px;cursor:pointer;font-weight:700;color:var(--muted);font-size:.9rem}.auth-toggle-btn.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}.google-button-wrapper{display:flex;justify-content:center}.auth-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.85rem}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border)}.form-notice{background:var(--surface-alt);color:var(--primary-dark);padding:10px 12px;border-radius:8px;font-size:.85rem;margin:0}.word-form{display:flex;flex-direction:column;gap:14px}label{display:flex;flex-direction:column;gap:4px;font-size:.9rem;color:var(--muted);font-weight:600}input[type=text],input[type=password],input[type=email],textarea,select{font-family:inherit;font-size:1rem;padding:9px 11px;border-radius:8px;border:1px solid var(--border);color:var(--text);background:var(--surface);font-weight:400}input:focus,textarea:focus,select:focus{outline:2px solid var(--primary-light);outline-offset:1px}.modes-fieldset{border:1px solid var(--border);border-radius:8px;padding:10px 14px;display:flex;gap:12px;flex-wrap:wrap}.modes-fieldset legend{color:var(--muted);font-size:.85rem;padding:0 4px}.checkbox-label{flex-direction:row;align-items:center;gap:6px;font-weight:400;color:var(--text)}.form-error{color:var(--danger);font-size:.9rem}.form-actions{display:flex;gap:10px}.hint{color:var(--muted);font-size:.82rem}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;margin-top:32px}.admin-header:first-child{margin-top:0}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}.upload-box{display:flex;flex-direction:column;gap:8px;align-items:flex-start}.upload-label{display:inline-block}.upload-summary{color:var(--success);font-size:.9rem}.admin-filters{display:flex;gap:12px;margin-bottom:16px}.admin-filters input{flex:1}.table-wrapper{overflow-x:auto}.word-table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden}.word-table th,.word-table td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;font-size:.9rem}.word-table th{color:var(--muted);font-size:.78rem;text-transform:uppercase}.cell-definition{max-width:320px}.cell-modes{display:flex;flex-wrap:wrap;gap:4px}.mode-badge{background:var(--surface-alt);color:var(--primary-dark);padding:2px 8px;border-radius:999px;font-size:.75rem;font-weight:600}.difficulty-badge{padding:2px 8px;border-radius:999px;font-size:.75rem;font-weight:600;text-transform:capitalize}.difficulty-easy{background:#e3f6ea;color:var(--success)}.difficulty-medium{background:#fff4e0;color:#b9770e}.difficulty-hard{background:#fde3e7;color:var(--danger)}.cell-actions{white-space:nowrap}code{background:var(--surface-alt);padding:1px 5px;border-radius:4px}.analytics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px}.stat-tile{background:var(--surface-alt);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:4px}.stat-value{font-size:1.8rem;font-weight:800;color:var(--primary-dark)}.stat-label{color:var(--muted);font-size:.8rem}.stat-chart{grid-column:1 / -1;background:var(--surface-alt);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:10px}.bar-chart{display:flex;align-items:flex-end;gap:10px;height:100px}.bar-chart-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:6px}.bar-chart-bar{width:100%;min-height:3px;background:linear-gradient(180deg,var(--primary-light),var(--primary));border-radius:6px 6px 0 0}.bar-chart-label{font-size:.7rem;color:var(--muted)}@media(max-width:600px){.topbar{padding:12px 16px}.brand{font-size:1.1rem}.topbar nav{gap:8px 10px}.nav-greeting{display:none}.btn-nav{padding:7px 16px!important}.main-content{padding:24px 16px}.home h1,.quiz-word{font-size:1.9rem}.mode-grid{grid-template-columns:repeat(2,1fr);gap:12px}.options-grid{grid-template-columns:1fr}}