*,:before,:after{box-sizing:border-box}body{color:#1a1208;-webkit-font-smoothing:antialiased;background:#fffbf4;margin:0;font-family:Nunito,system-ui,sans-serif;font-size:17px}:root{--bg:#fffbf4;--surface:#fff;--border:#e8d9be;--border-hi:#d4c09a;--text:#1a1208;--muted:#7a6a52;--muted-2:#5c4a32;--amber:#f59e0b;--amber-hi:#fcd34d;--amber-bg:#fef3c7;--amber-dark:#92400e;--coral:#f43f5e;--coral-bg:#ffe4e6;--coral-dark:#9f1239;--teal:#0d9488;--teal-bg:#ccfbf1;--teal-dark:#134e4a;--green:#16a34a;--green-bg:#dcfce7;--green-dark:#14532d;--font-display:"Fraunces", Georgia, serif;--font-body:"Nunito", system-ui, sans-serif;--font-mono:"JetBrains Mono", monospace;--radius-sm:10px;--radius:20px;--radius-lg:28px;--ease:.2s ease}.app-nav{z-index:100;-webkit-backdrop-filter:blur(12px);border-bottom:2px solid var(--border);background:#fffbf4eb;align-items:center;padding:16px 40px;display:flex;position:sticky;top:0}.app-nav-logo{font-family:var(--font-display);color:var(--text);letter-spacing:-.02em;font-size:1.7rem;font-weight:900;text-decoration:none}.app-nav-logo span{color:var(--amber)}.page{max-width:920px;margin:0 auto;padding:48px 28px 80px}.page-loading{min-height:40vh;font-family:var(--font-display);color:var(--muted);justify-content:center;align-items:center;font-size:1.4rem;font-weight:700;display:flex}.btn{border:2px solid var(--border-hi);background:var(--surface);cursor:pointer;font-family:var(--font-body);color:var(--muted-2);white-space:nowrap;transition:all var(--ease);border-radius:50px;align-items:center;gap:6px;padding:9px 20px;font-size:.9rem;font-weight:700;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--text);color:var(--text)}.btn-primary{background:var(--amber);color:var(--text);border-color:var(--amber)}.btn-primary:hover{background:var(--amber-hi);border-color:var(--amber-hi);transform:translateY(-1px);box-shadow:0 6px 20px #f59e0b59}.btn-danger{background:var(--surface);color:var(--coral-dark);border-color:var(--coral)}.btn-danger:hover{background:var(--coral-bg)}.btn-sm{padding:6px 14px;font-size:.8rem}.btn-lg{padding:14px 36px;font-size:1.05rem}.btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none!important;transform:none!important}.empty-state{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:72px 24px;display:flex}.empty-state-icon{margin-bottom:8px;font-size:3.5rem}.empty-state-title{font-family:var(--font-display);letter-spacing:-.02em;color:var(--text);margin:0;font-size:1.8rem;font-weight:900}.empty-state-desc{color:var(--muted);max-width:340px;margin:0 0 16px;font-size:1rem;font-weight:500;line-height:1.6}.error{color:var(--coral-dark);background:var(--coral-bg);border:2px solid var(--coral);border-radius:var(--radius-sm);margin-bottom:24px;padding:12px 18px;font-weight:600}.dashboard-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:40px;display:flex}.dashboard-title{font-family:var(--font-display);letter-spacing:-.03em;color:var(--text);margin:0 0 6px;font-size:2.6rem;font-weight:900}.dashboard-subtitle{color:var(--muted);margin:0;font-size:1rem;font-weight:500}.set-capacity-label{font-family:var(--font-mono);letter-spacing:.06em;color:var(--muted);text-align:right;margin-top:12px;font-size:.7rem;font-weight:500}.btn:disabled{opacity:.4;cursor:not-allowed;pointer-events:none}.deck-list{flex-direction:column;gap:16px;display:flex}.deck-row{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);transition:background var(--ease), border-color var(--ease);cursor:pointer;justify-content:space-between;align-items:center;padding:22px 20px;display:flex}.deck-row:hover{background:var(--bg);border-color:var(--accent)}.deck-row-info{align-items:baseline;gap:12px;min-width:0;display:flex}.deck-card-name{font-family:var(--font-display);letter-spacing:-.01em;color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:1.05rem;font-weight:800;overflow:hidden}.deck-card-count{font-family:var(--font-mono);letter-spacing:.06em;color:var(--muted);text-transform:uppercase;flex-shrink:0;margin:0;font-size:.75rem;font-weight:500}.deck-row-actions{flex-shrink:0;align-items:center;gap:8px;display:flex}.deck-study-btn{padding:8px 18px;font-size:.9rem}.deck-menu{opacity:0;transition:opacity var(--ease);position:relative}.deck-row:hover .deck-menu,.deck-menu.is-open{opacity:1}.deck-menu-trigger{letter-spacing:.1em;color:var(--muted);background:0 0;border:2px solid #0000;padding:6px 10px;font-size:1rem}.deck-menu-trigger:hover{color:var(--text);border-color:var(--border)}.deck-menu-dropdown{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);z-index:50;transform-origin:100% 0;flex-direction:column;gap:2px;min-width:160px;padding:6px;animation:.15s both menu-pop;display:flex;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 8px 24px #1a12081f}@keyframes menu-pop{0%{opacity:0;transform:scale(.88)translateY(-4px)}to{opacity:1;transform:scale(1)translateY(0)}}.deck-menu-item{border-radius:var(--radius-sm);cursor:pointer;width:100%;font-family:var(--font-body);color:var(--text);text-align:left;transition:background var(--ease);background:0 0;border:none;align-items:center;gap:10px;padding:9px 12px;font-size:.9rem;font-weight:600;display:flex}.deck-menu-item:hover{background:var(--bg)}.deck-menu-item span{font-size:.85rem}.deck-menu-item--danger{color:var(--coral-dark)}.deck-menu-item--danger:hover{background:var(--coral-bg)}.deck-menu-item:disabled{opacity:.4;cursor:not-allowed}.deck-menu-item:disabled:hover{background:0 0}.deck-menu-divider{background:var(--border);border-radius:1px;height:2px;margin:4px 0}.detail-card-list{flex-direction:column;gap:12px;display:flex}.detail-card-row{align-items:flex-start;gap:14px;display:flex}.detail-card-body{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);flex:1;gap:0;display:flex;overflow:hidden}.detail-card-side{flex-direction:column;flex:1;gap:6px;padding:16px 20px;display:flex}.detail-card-label{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:.7rem;font-weight:600}.detail-card-text{font-family:var(--font-body);color:var(--text);white-space:pre-wrap;margin:0;font-size:.95rem;font-weight:500}.detail-card-divider{background:var(--border);flex-shrink:0;align-self:stretch;width:2px}.editor-breadcrumb{margin-bottom:10px}.editor-back-link{color:var(--text-muted);cursor:pointer;letter-spacing:.01em;background:0 0;border:none;padding:0;font-size:.875rem}.editor-back-link:hover{color:var(--text)}.editor-header{flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:36px;display:flex}.editor-header-title{flex-direction:column;flex:1;align-items:flex-start;gap:6px;min-width:0;display:flex}.editor-header-title h1{font-family:var(--font-display);letter-spacing:-.025em;color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:1.9rem;font-weight:900;overflow:hidden}.title-display-row{align-items:center;gap:8px;min-width:0;display:flex}.title-edit-row{align-items:center;gap:6px;width:100%;min-width:0;display:flex}.title-edit-input{font-family:var(--font-display);letter-spacing:-.025em;color:var(--text);background:var(--surface);border:2px solid var(--amber);border-radius:6px;outline:none;flex:1;min-width:0;padding:2px 8px;font-size:1.9rem;font-weight:900}.title-edit-input:focus{border-color:var(--amber-hi)}.title-edit-btn{cursor:pointer;transition:color var(--ease), background var(--ease);background:0 0;border:none;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;padding:4px;display:flex}.title-edit-btn--pencil{color:var(--muted)}.title-edit-btn--pencil:hover{color:var(--text)}.title-edit-btn--confirm{color:var(--muted)}.title-edit-btn--confirm:hover{color:#22a63a}.title-edit-btn--discard{color:var(--muted)}.title-edit-btn--discard:hover{color:var(--coral-dark)}.title-edit-btn:disabled{opacity:.4;cursor:not-allowed}.editor-card-count{font-family:var(--font-mono);color:var(--amber-dark);background:var(--amber-bg);border:1.5px solid var(--amber);white-space:nowrap;border-radius:50px;padding:3px 12px;font-size:.75rem;font-weight:500}.editor-header-actions{gap:10px;display:flex}.editor-header-actions .deck-menu-dropdown{top:calc(100% + 6px);bottom:unset;transform-origin:100% 0}.card-list{flex-direction:column;gap:14px;display:flex}.card-row{transition:opacity var(--ease);align-items:stretch;gap:14px;display:flex;position:relative}.card-row--dragging{opacity:.35}.card-row-actions{z-index:1;align-items:center;gap:6px;display:flex;position:absolute;top:10px;right:12px}.card-row-num{font-family:var(--font-display);color:var(--muted);z-index:1;font-size:.9rem;font-weight:900;line-height:1;position:absolute;top:20px;left:22px}.card-row-icon-btn{cursor:pointer;color:var(--border-hi);transition:color var(--ease);background:0 0;border:none;align-items:center;padding:2px;display:flex}.card-row-icon-btn:hover{color:var(--coral-dark)}.card-row-drag{cursor:grab;color:var(--border-hi);transition:color var(--ease);-webkit-user-select:none;user-select:none;align-items:center;display:flex}.card-row-drag:hover{color:var(--muted)}.card-row-drag:active{cursor:grabbing}.drag-icon{flex-shrink:0}.flashcard-editor{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);transition:border-color var(--ease), box-shadow var(--ease);flex:1;display:flex;overflow:hidden}.flashcard-editor:focus-within{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-bg)}.flashcard-editor-side{flex-direction:column;flex:1;gap:8px;padding:48px 20px 14px;display:flex}.flashcard-editor-divider{background:var(--border);flex-shrink:0;width:2px}.flashcard-editor-label{text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-size:.68rem;font-weight:800}.flashcard-editor-textarea{border:2px solid var(--border);border-radius:var(--radius-sm);width:100%;min-height:72px;font-size:.95rem;font-family:var(--font-body);resize:vertical;color:var(--text);background:var(--bg);transition:border-color var(--ease), background var(--ease);flex:1;padding:10px 12px;font-weight:500}.flashcard-editor-textarea:focus{border-color:var(--amber);background:var(--surface);outline:none}.add-card-bottom{width:100%;color:var(--muted);background:0 0;border-style:dashed;justify-content:center;margin-top:14px}.add-card-bottom:hover{background:var(--amber-bg);border-color:var(--amber);color:var(--amber-dark)}.study-progress-track{background:var(--border);width:100%;height:5px}.study-progress-fill{background:var(--amber);border-radius:0 3px 3px 0;height:100%;transition:width .4s cubic-bezier(.4,0,.2,1)}.study-header{flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:40px;display:flex}.study-set-name{font-family:var(--font-display);letter-spacing:-.025em;color:var(--text);white-space:nowrap;text-overflow:ellipsis;flex:1;margin:0;font-size:1.7rem;font-weight:900;overflow:hidden}.study-counter{font-family:var(--font-mono);color:var(--amber-dark);background:var(--amber-bg);border:1.5px solid var(--amber);white-space:nowrap;border-radius:50px;flex-shrink:0;padding:4px 14px;font-size:.8rem;font-weight:500}.study-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);text-align:center;box-shadow:0 4px 0 var(--border);flex-direction:column;justify-content:center;align-items:center;gap:36px;min-height:280px;padding:56px 48px 48px;display:flex}.study-front{font-family:var(--font-display);letter-spacing:-.02em;color:var(--text);max-width:560px;margin:0;font-size:2rem;font-weight:700;line-height:1.3}.study-input-area{flex-wrap:wrap;justify-content:center;gap:10px;width:100%;max-width:520px;display:flex}.study-input{border:2px solid var(--border);min-width:220px;font-size:1rem;font-family:var(--font-body);background:var(--bg);color:var(--text);transition:border-color var(--ease), box-shadow var(--ease);border-radius:50px;flex:1;padding:13px 20px;font-weight:600}.study-input:focus{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-bg);outline:none}.study-result{flex-direction:column;align-items:center;gap:20px;width:100%;display:flex}.study-result-correct{background:var(--green-bg);border:2px solid var(--green);color:var(--green-dark);border-radius:50px;align-items:center;gap:10px;padding:12px 28px;font-size:1.1rem;font-weight:800;display:flex}.study-result-incorrect{background:var(--coral-bg);border:2px solid var(--coral);border-radius:var(--radius);color:var(--coral-dark);text-align:center;max-width:400px;padding:16px 28px;font-size:1rem;font-weight:600;line-height:1.6}.result-icon{font-size:1.2rem;font-weight:900}.study-done-container{justify-content:center;align-items:center;min-height:70vh;padding:40px 24px;display:flex}.study-done-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);text-align:center;width:100%;max-width:480px;box-shadow:0 8px 0 var(--border);padding:60px 56px}.study-done-icon{margin-bottom:16px;font-size:4rem;line-height:1}.study-done-title{font-family:var(--font-display);letter-spacing:-.03em;color:var(--text);margin:0 0 28px;font-size:2.8rem;font-weight:900}.study-score{background:var(--amber-bg);border:2px solid var(--amber);border-radius:var(--radius);align-items:baseline;gap:4px;margin-bottom:10px;padding:12px 32px;display:inline-flex}.study-score--green{background:var(--green-bg);border-color:var(--green)}.study-score--coral{background:var(--coral-bg);border-color:var(--coral)}.study-score-num{font-family:var(--font-display);letter-spacing:-.03em;color:var(--amber-dark);font-size:3rem;font-weight:900;line-height:1}.study-score--green .study-score-num{color:var(--green-dark)}.study-score--coral .study-score-num{color:var(--coral-dark)}.study-score-sep{font-family:var(--font-display);color:var(--muted);font-size:1.8rem;font-weight:300}.study-score-total{font-family:var(--font-display);color:var(--muted-2);font-size:1.8rem;font-weight:700}.study-score-pct{color:var(--muted);margin:0 0 36px;font-size:1rem;font-weight:700}.study-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.modal-overlay{-webkit-backdrop-filter:blur(4px);z-index:200;background:#1a120873;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal-box{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:440px;box-shadow:0 24px 64px #1a120833, 0 4px 0 var(--border);padding:40px;animation:.2s cubic-bezier(.34,1.56,.64,1) modalIn}@keyframes modalIn{0%{opacity:0;transform:scale(.94)translateY(8px)}to{opacity:1;transform:scale(1)translateY(0)}}.modal-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--text);margin:0 0 20px;font-size:1.7rem;font-weight:900}.modal-message{color:var(--muted-2);margin:0 0 28px;font-size:1rem;font-weight:500;line-height:1.65}.modal-input{border:2px solid var(--border);width:100%;font-size:1rem;font-family:var(--font-body);background:var(--bg);color:var(--text);transition:border-color var(--ease), box-shadow var(--ease);border-radius:50px;margin-bottom:24px;padding:13px 20px;font-weight:600}.modal-input:focus{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-bg);outline:none}.modal-actions{justify-content:flex-end;gap:10px;display:flex}.toast{z-index:300;font-family:var(--font-body);white-space:nowrap;border:2px solid;border-radius:50px;padding:12px 28px;font-size:.95rem;font-weight:700;animation:.3s cubic-bezier(.34,1.56,.64,1) toastIn;position:fixed;bottom:32px;left:50%;transform:translate(-50%);box-shadow:0 8px 24px #1a120826}.toast--success{background:var(--green-bg);border-color:var(--green);color:var(--green-dark)}.toast--error{background:var(--coral-bg);border-color:var(--coral);color:var(--coral-dark)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%)translateY(12px)}to{opacity:1;transform:translate(-50%)translateY(0)}}.nav-avatar-wrap{margin-left:auto;position:relative}.nav-avatar{background:var(--amber);border:2px solid var(--amber-dark);width:38px;height:38px;color:var(--amber-dark);font-family:var(--font-display);letter-spacing:.03em;cursor:pointer;transition:background var(--ease), transform var(--ease);border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:.8rem;font-weight:900;line-height:1;display:flex}.nav-avatar:hover{background:var(--amber-hi);transform:scale(1.07)}.nav-dropdown{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-sm);min-width:200px;box-shadow:0 6px 0 var(--border);z-index:200;animation:.15s cubic-bezier(.34,1.56,.64,1) dropdownIn;position:absolute;top:calc(100% + 10px);right:0;overflow:hidden}@keyframes dropdownIn{0%{opacity:0;transform:translateY(-6px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}.nav-dropdown-email{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;padding:10px 14px 8px;font-size:.78rem;font-weight:600;overflow:hidden}.nav-dropdown-divider{border:none;border-top:2px solid var(--border);margin:0}.nav-dropdown-item{text-align:left;width:100%;font-family:var(--font-body);color:var(--text);cursor:pointer;transition:background var(--ease);background:0 0;border:none;padding:10px 14px;font-size:.9rem;font-weight:700;display:block}.nav-dropdown-item:hover{background:var(--amber-bg);color:var(--amber-dark)}.auth-page{justify-content:center;align-items:center;min-height:calc(100vh - 69px);padding:40px 24px;display:flex}.auth-card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:420px;box-shadow:0 8px 0 var(--border);padding:48px 44px;animation:.2s cubic-bezier(.34,1.56,.64,1) modalIn}.auth-logo{font-family:var(--font-display);color:var(--text);letter-spacing:-.02em;margin-bottom:20px;font-size:1.5rem;font-weight:900}.auth-logo span{color:var(--amber)}.auth-title{font-family:var(--font-display);letter-spacing:-.025em;color:var(--text);margin:0 0 28px;font-size:2rem;font-weight:900}.auth-mode-switch{color:var(--muted);text-align:center;margin:20px 0 0;font-size:.9rem;font-weight:500}.auth-mode-switch button{cursor:pointer;font-family:var(--font-body);color:var(--amber-dark);text-underline-offset:2px;background:0 0;border:none;padding:0;font-size:.9rem;font-weight:700;text-decoration:underline}.auth-mode-switch button:hover{color:var(--text)}.auth-google-btn{justify-content:center;gap:10px;width:100%;margin-bottom:4px}.auth-divider{color:var(--muted);align-items:center;gap:12px;margin:16px 0;font-size:.85rem;font-weight:600;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--border);border-radius:1px;flex:1;height:2px}.auth-submit{justify-content:center;width:100%}@media (width<=640px){.app-nav{padding:14px 20px}.page{padding:28px 16px 60px}.dashboard-title{font-size:2rem}.deck-row{padding:12px 16px}.editor-header{flex-wrap:wrap}.editor-header-title h1,.title-edit-input{font-size:1.4rem}.card-row,.flashcard-editor{flex-direction:column}.flashcard-editor-divider{width:100%;height:2px}.study-card{min-height:auto;padding:36px 24px}.study-front{font-size:1.5rem}.study-done-card{padding:40px 28px}.study-done-title{font-size:2.2rem}.auth-card{padding:32px 24px}.auth-title{font-size:1.6rem}}