*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f0f13;--bg-card: #1a1a2e;--bg-card-hover: #22223a;--bg-input: #16162a;--accent: #7c6fe0;--accent-hover: #6b5ed4;--accent-light: #a89cec;--text: #e8e8f0;--text-muted: #8888a0;--text-dim: #5a5a72;--border: #2a2a40;--danger: #e05252;--danger-hover: #c94545;--success: #4ecb71;--warning: #e0b84e;--radius: 10px;--radius-sm: 6px;--radius-lg: 16px;--shadow: 0 4px 24px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--transition: .15s ease}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,Arial,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:var(--accent-light);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--accent)}img{max-width:100%;display:block}.layout{min-height:100vh;display:flex;flex-direction:column}.container{max-width:960px;margin:0 auto;padding:24px 20px 60px;width:100%;flex:1}.page-center{display:flex;align-items:center;justify-content:center;min-height:100vh;flex-direction:column;gap:16px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;flex-wrap:wrap;gap:12px}.page-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.02em}.topbar{border-bottom:1px solid var(--border);background:#0f0f13d9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);position:sticky;top:0;z-index:50}.topbar-inner{max-width:960px;margin:0 auto;padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between}.topbar-logo{font-size:1.125rem;font-weight:700;color:var(--text)!important;letter-spacing:-.02em}.topbar-nav{display:flex;align-items:center;gap:8px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:.875rem;font-weight:600;border:none;cursor:pointer;transition:all var(--transition);white-space:nowrap;line-height:1.4}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px #7c6fe04d}.btn-secondary{background:var(--bg-card);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--text-dim)}.btn-ghost{background:transparent;color:var(--text-muted);padding:8px 14px}.btn-ghost:hover{color:var(--text);background:var(--bg-card)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--danger-hover)}.btn-full{width:100%}.btn-sm{padding:6px 12px;font-size:.8125rem}.btn-google{background:var(--bg-input);border:1px solid var(--border)}.btn-google:hover{background:var(--bg-card-hover);border-color:var(--text-dim)}.auth-form{display:flex;flex-direction:column;gap:16px}.form-group{display:flex;flex-direction:column;gap:6px;flex:1}.form-group label{font-size:.8125rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.form-group input,.form-group textarea{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-input);color:var(--text);font-size:.9375rem;font-family:inherit;transition:border-color var(--transition),box-shadow var(--transition);outline:none;resize:vertical}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-dim)}.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c6fe026}.form-check{flex-direction:row;align-items:center;gap:10px}.form-check input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}.form-check label{text-transform:none;font-size:.875rem;color:var(--text)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:600px){.form-row{grid-template-columns:1fr}}.auth-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px 36px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.auth-header{text-align:center;margin-bottom:28px}.auth-logo{display:inline-flex;margin-bottom:16px}.auth-header h1{font-size:1.5rem;font-weight:700;margin-bottom:6px;letter-spacing:-.02em}.auth-subtitle{color:var(--text-muted);font-size:.9375rem}.auth-divider{display:flex;align-items:center;gap:16px;margin:20px 0;color:var(--text-dim);font-size:.8125rem}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border)}.auth-footer{text-align:center;margin-top:24px;font-size:.875rem;color:var(--text-muted)}.error-banner{background:#e052521f;border:1px solid rgba(224,82,82,.3);color:#f08080;padding:10px 14px;border-radius:var(--radius-sm);font-size:.875rem;margin-bottom:8px}.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.deck-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:8px;transition:all var(--transition);cursor:pointer;position:relative;overflow:hidden;text-decoration:none;color:var(--text)}.deck-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 6px 24px #7c6fe01f;color:var(--text)}.deck-card-accent{position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent-light));opacity:0;transition:opacity var(--transition)}.deck-card:hover .deck-card-accent{opacity:1}.deck-card-title{font-size:1.0625rem;font-weight:600;letter-spacing:-.01em}.deck-card-desc{color:var(--text-muted);font-size:.875rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.deck-card-footer{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:8px}.deck-card-count{font-size:.8125rem;color:var(--text-dim)}.badge{display:inline-flex;padding:2px 8px;border-radius:999px;font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;background:#7c6fe026;color:var(--accent-light)}.browse-card{cursor:default}.browse-card:hover{transform:none;cursor:default}.back-link{display:inline-flex;align-items:center;gap:4px;color:var(--text-muted);font-size:.875rem;margin-bottom:20px;transition:color var(--transition)}.back-link:hover{color:var(--text)}.deck-header{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:32px;flex-wrap:wrap}.deck-header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.02em;margin-bottom:4px}.deck-description{color:var(--text-muted);font-size:.9375rem;margin-bottom:8px}.deck-meta{display:flex;gap:12px;align-items:center;font-size:.875rem;color:var(--text-dim)}.deck-actions{display:flex;gap:8px;flex-shrink:0;flex-wrap:wrap}.card-form-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:24px}.card-form-container h3{font-size:1.125rem;font-weight:600;margin-bottom:16px}.card-list{display:flex;flex-direction:column;gap:8px}.card-item{display:flex;align-items:center;gap:16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;transition:border-color var(--transition)}.card-item:hover{border-color:var(--text-dim)}.card-item-number{font-size:.8125rem;font-weight:700;color:var(--text-dim);min-width:24px;text-align:center}.card-item-content{flex:1;display:flex;gap:16px;min-width:0}.card-item-side{flex:1;min-width:0}.card-item-label{font-size:.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);display:block;margin-bottom:4px}.card-item-side p{font-size:.875rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-item-img{width:60px;height:40px;object-fit:cover;border-radius:var(--radius-sm);margin-top:6px}.card-item-divider{width:1px;align-self:stretch;background:var(--border)}@media(max-width:600px){.card-item-content{flex-direction:column}.card-item-divider{width:100%;height:1px}.deck-header{flex-direction:column}}.study-container{max-width:680px}.study-title{font-size:1.25rem;font-weight:600;margin-bottom:20px;color:var(--text-muted)}.study-progress{display:flex;align-items:center;gap:12px;margin-bottom:24px}.study-progress-bar{flex:1;height:6px;background:var(--bg-card);border-radius:999px;overflow:hidden}.study-progress-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-light));border-radius:999px;transition:width .3s ease}.study-progress-text{font-size:.8125rem;color:var(--text-dim);font-weight:600;min-width:60px;text-align:right}.study-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 32px;min-height:280px;display:flex;flex-direction:column;gap:24px;cursor:pointer;transition:border-color var(--transition);outline:none}.study-card:focus-visible{border-color:var(--accent);box-shadow:0 0 0 3px #7c6fe033}.study-card-side{flex:1}.study-card-back{border-top:1px solid var(--border);padding-top:24px;animation:fadeIn .2s ease}.study-card-label{font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-light);display:block;margin-bottom:10px}.study-card-text{font-size:1.25rem;font-weight:500;line-height:1.6}.study-card-img{max-width:300px;border-radius:var(--radius);margin-top:12px}.study-reveal-btn{display:block;width:100%;padding:14px;background:var(--bg-input);border:1px dashed var(--border);border-radius:var(--radius);color:var(--text-dim);font-size:.9375rem;font-family:inherit;cursor:pointer;transition:all var(--transition)}.study-reveal-btn:hover{border-color:var(--accent);color:var(--accent-light);background:#7c6fe00d}.study-ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:20px;animation:fadeIn .2s ease}.rating-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);cursor:pointer;transition:all var(--transition);font-family:inherit}.rating-btn:hover{transform:translateY(-2px)}.rating-label{font-size:.875rem;font-weight:700}.rating-sub{font-size:.6875rem;color:var(--text-dim)}.rating-again{color:var(--danger);border-color:#e0525233}.rating-again:hover{background:#e0525214;border-color:var(--danger)}.rating-hard{color:var(--warning);border-color:#e0b84e33}.rating-hard:hover{background:#e0b84e14;border-color:var(--warning)}.rating-good{color:var(--success);border-color:#4ecb7133}.rating-good:hover{background:#4ecb7114;border-color:var(--success)}.rating-easy{color:var(--accent-light);border-color:#7c6fe033}.rating-easy:hover{background:#7c6fe014;border-color:var(--accent)}.study-done{display:flex;flex-direction:column;align-items:center;text-align:center;padding:60px 20px;gap:12px}.study-done-icon{margin-bottom:12px;animation:scaleIn .4s ease}.study-done h2{font-size:1.5rem;font-weight:700}.study-done p{color:var(--text-muted)}.study-done-actions{display:flex;gap:10px;margin-top:16px}.search-bar{position:relative;margin-bottom:24px}.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-dim);pointer-events:none}.search-input{width:100%;padding:12px 14px 12px 42px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);color:var(--text);font-size:.9375rem;font-family:inherit;outline:none;transition:border-color var(--transition),box-shadow var(--transition)}.search-input::placeholder{color:var(--text-dim)}.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c6fe026}.empty-state{display:flex;flex-direction:column;align-items:center;text-align:center;padding:60px 20px;gap:8px}.empty-icon{margin-bottom:12px;opacity:.5}.empty-state h2{font-size:1.25rem;font-weight:600}.empty-state p{color:var(--text-muted);margin-bottom:8px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px;animation:fadeIn .15s ease}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;width:100%;max-width:480px;box-shadow:var(--shadow-lg);animation:slideUp .2s ease}.modal h2{font-size:1.25rem;font-weight:700;margin-bottom:20px}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@media(max-width:480px){.auth-card{padding:28px 20px}.study-card{padding:24px 20px}.study-ratings{grid-template-columns:repeat(2,1fr)}.deck-grid{grid-template-columns:1fr}}.landing{min-height:100vh;display:flex;flex-direction:column;background:radial-gradient(ellipse 900px 500px at 50% -10%,rgba(124,111,224,.18),transparent 60%),var(--bg)}.landing-topbar{position:sticky;top:0;z-index:50;background:#0f0f13bf;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.landing-topbar-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}.landing-brand{display:inline-flex;align-items:center;gap:10px;font-size:1.0625rem;font-weight:700;color:var(--text)!important;letter-spacing:-.01em}.landing-nav{display:flex;align-items:center;gap:8px}.landing-nav a{color:var(--text-muted);font-size:.9375rem;padding:8px 12px;border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition)}.landing-nav a:hover{color:var(--text);background:var(--bg-card)}.landing-nav .btn{padding:8px 14px}@media(max-width:640px){.landing-nav a[href^="#"]{display:none}}.landing-hero{padding:96px 24px 72px;text-align:center}.landing-hero-inner{max-width:820px;margin:0 auto}.landing-hero-badge{display:inline-flex;padding:6px 14px;border-radius:999px;background:#7c6fe01f;border:1px solid rgba(124,111,224,.3);color:var(--accent-light);font-size:.8125rem;font-weight:500;margin-bottom:28px}.landing-hero h1{font-size:clamp(2.25rem,5vw,3.75rem);font-weight:800;line-height:1.05;letter-spacing:-.03em;margin-bottom:24px}.accent-gradient{background:linear-gradient(135deg,#a89cec,#7c6fe0 60%,#6b5ed4);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.landing-hero-sub{font-size:1.125rem;color:var(--text-muted);max-width:620px;margin:0 auto 36px;line-height:1.6}.landing-hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:20px}.btn-lg{padding:14px 28px;font-size:.9375rem}.landing-hero-trust{font-size:.8125rem;color:var(--text-dim)}.landing-section{padding:72px 24px}.landing-section-alt{background:#16162a66;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.landing-section-inner{max-width:1120px;margin:0 auto}.landing-section-title{font-size:clamp(1.75rem,3.5vw,2.5rem);font-weight:700;letter-spacing:-.02em;text-align:center;margin-bottom:12px}.landing-section-sub{text-align:center;color:var(--text-muted);font-size:1rem;margin-bottom:48px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}@media(max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.feature-grid{grid-template-columns:1fr}}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:border-color var(--transition),transform var(--transition)}.feature-card:hover{border-color:var(--accent-light);transform:translateY(-2px)}.feature-icon{font-size:1.75rem;margin-bottom:12px}.feature-card h3{font-size:1.0625rem;font-weight:700;margin-bottom:8px;letter-spacing:-.01em}.feature-card p{color:var(--text-muted);font-size:.9375rem;line-height:1.55}.download-group{max-width:640px;margin:0 auto 36px}.download-group-title{text-align:center;font-size:.8125rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:16px}.download-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:500px){.download-buttons{grid-template-columns:1fr}}.download-btn{display:flex;align-items:center;gap:14px;padding:16px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text)!important;transition:all var(--transition)}.download-btn:hover{background:var(--bg-card-hover);border-color:var(--accent-light);transform:translateY(-1px)}.download-btn svg{flex-shrink:0;color:var(--text)}.download-btn span{display:flex;flex-direction:column;line-height:1.2}.download-btn small{font-size:.6875rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:2px}.download-btn strong{font-size:1rem;font-weight:700}.pricing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,360px));gap:20px;justify-content:center;margin-top:8px}@media(max-width:720px){.pricing-grid{grid-template-columns:1fr;max-width:400px;margin-left:auto;margin-right:auto}}.pricing-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;display:flex;flex-direction:column;position:relative;transition:transform .2s ease}.pricing-card-featured{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 12px 48px #7c6fe047;transform:scale(1.04);background:linear-gradient(180deg,rgba(124,111,224,.08) 0%,var(--bg-card) 60%)}@media(max-width:720px){.pricing-card-featured{transform:none}}.pricing-grid>.pricing-card:not(.pricing-card-featured){opacity:.82}.pricing-badge{position:absolute;top:-14px;left:50%;transform:translate(-50%);background:var(--accent);color:#fff;padding:6px 16px;border-radius:999px;font-size:.8125rem;font-weight:700;letter-spacing:.01em;white-space:nowrap;box-shadow:0 4px 16px #7c6fe066}.pricing-price-note{color:var(--text-muted);font-size:.8125rem;margin:-18px 0 20px}.pricing-trust-line{text-align:center;color:var(--text-muted);font-size:.8125rem;margin-top:12px}.pricing-features li.pricing-feature-excluded{color:var(--text-muted);opacity:.6;text-decoration:line-through}.pricing-features li.pricing-feature-excluded:before{content:"✗";color:var(--text-muted)}.pricing-card h3{font-size:1.25rem;font-weight:700;margin-bottom:4px}.pricing-desc{color:var(--text-muted);font-size:.875rem;margin-bottom:16px}.pricing-price{display:flex;align-items:baseline;gap:6px;margin:16px 0 24px}.price-amount{font-size:2.5rem;font-weight:800;letter-spacing:-.03em}.price-interval{color:var(--text-muted);font-size:.9375rem}.pricing-features{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:10px;flex:1}.pricing-features li{padding-left:24px;position:relative;font-size:.9375rem;color:var(--text)}.pricing-features li:before{content:"✓";position:absolute;left:0;color:var(--accent-light);font-weight:700}.landing-footer{margin-top:auto;padding:40px 24px 32px;border-top:1px solid var(--border);background:#0f0f1399}.landing-footer-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}.landing-footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:700}.landing-footer-links{display:flex;gap:20px}.landing-footer-links a{color:var(--text-muted);font-size:.875rem}.landing-footer-links a:hover{color:var(--text)}.landing-footer-copy{color:var(--text-dim);font-size:.8125rem}.success-banner{padding:12px 16px;background:#4ecb711a;border:1px solid rgba(78,203,113,.4);color:var(--success);border-radius:var(--radius-sm);font-size:.9375rem;margin-bottom:20px}.subscription-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;max-width:520px;margin:0 auto;display:flex;flex-direction:column;gap:20px}.subscription-card h2{font-size:1.375rem;font-weight:700;letter-spacing:-.01em}.subscription-sub{color:var(--text-muted);font-size:.9375rem;margin-top:-12px}.subscription-status{display:flex;flex-direction:column;gap:8px}.subscription-status-badge{align-self:flex-start;background:var(--accent);color:#fff;padding:4px 12px;border-radius:999px;font-size:.75rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.subscription-status p{color:var(--text-muted)}.checkout-form{display:flex;flex-direction:column;gap:16px}.checkout-secure{display:flex;align-items:center;gap:6px;color:var(--text-dim);font-size:.8125rem;justify-content:center}.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted)}