*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg: #0f0f14;--surface: #1a1a24;--surface-hover: #22222e;--border: #2a2a3a;--text: #e4e4ef;--text-muted: #8888a0;--primary: #6c5ce7;--primary-hover: #7d6ff0;--danger: #e74c3c;--danger-hover: #ff6b5a;--success: #27ae60;--radius: 8px;--font: system-ui, -apple-system, sans-serif}body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;cursor:pointer;transition:background .15s}.btn:hover{background:var(--surface-hover)}.btn--primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-hover)}.btn--danger{background:var(--danger);border-color:var(--danger);color:#fff}.btn--danger:hover{background:var(--danger-hover)}.btn--secondary{background:transparent}.btn:disabled{opacity:.5;cursor:not-allowed}.link-btn{background:none;border:none;color:var(--primary);cursor:pointer;text-decoration:underline;font:inherit}.input{padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;width:100%}.input:focus{outline:2px solid var(--primary);outline-offset:-1px}select.input{cursor:pointer}.layout{min-height:100vh;display:flex;flex-direction:row}.sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:100vh;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar__header{display:flex;align-items:center;justify-content:space-between;padding:18px 16px 12px;border-bottom:1px solid var(--border)}.sidebar__logo{font-size:16px;font-weight:700;color:var(--text)}.sidebar__close{display:none;background:none;border:none;color:var(--text-muted);font-size:16px;cursor:pointer;padding:4px}.sidebar__nav{display:flex;flex-direction:column;padding:12px 8px;gap:2px}.sidebar__link{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--radius);color:var(--text-muted);font-size:14px;transition:background .15s,color .15s}.sidebar__link:hover{background:var(--surface-hover);color:var(--text)}.sidebar__overlay{display:none;position:fixed;inset:0;background:#00000080;z-index:99}.sidebar__overlay--visible{display:block}.layout__body{flex:1;display:flex;flex-direction:column;min-width:0}.header{display:none;align-items:center;gap:16px;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--border)}.header__menu-btn{background:none;border:none;color:var(--text);font-size:22px;cursor:pointer;line-height:1;padding:0}.header__logo{font-size:16px;font-weight:700;color:var(--text)}.main{flex:1;padding:24px;max-width:1100px;width:100%}@media(max-width:768px){.layout{flex-direction:column}.sidebar{position:fixed;top:0;left:-100%;height:100%;min-height:100%;z-index:100;transition:left .25s ease;width:240px}.sidebar--open{left:0}.sidebar__close{display:block}.header{display:flex}.main{padding:16px}}.spine-list__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.spine-list__header h1{font-size:24px}.spine-list__search{margin-bottom:20px;max-width:400px}.spine-list__empty{color:var(--text-muted);padding:40px 0;text-align:center}.spine-list__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}.spine-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .15s,transform .15s;color:var(--text)}.spine-card:hover{border-color:var(--primary);transform:translateY(-2px)}.spine-card__preview{height:140px;display:flex;align-items:center;justify-content:center;background:var(--bg);font-size:40px;color:var(--text-muted)}.spine-card__info{padding:12px}.spine-card__name{font-size:14px;font-weight:600;margin-bottom:4px}.spine-card__meta{font-size:12px;color:var(--text-muted)}.spine-upload{max-width:600px}.spine-upload h1{margin-bottom:24px;font-size:24px}.upload-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:14px;font-weight:500}.form-actions{display:flex;gap:12px;justify-content:flex-end}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:24px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.drop-zone:hover,.drop-zone--active{border-color:var(--primary);background:#6c5ce70d}.drop-zone__text{color:var(--text-muted);font-size:14px}.drop-zone__file{display:none;font-size:13px;margin-top:8px;color:var(--primary);word-break:break-all}.spine-detail__header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.spine-detail__title{font-size:24px;flex:1}.spine-detail__actions{display:flex;gap:8px}.spine-detail__body{display:grid;grid-template-columns:1fr 300px;gap:24px}@media(max-width:768px){.spine-detail__body{grid-template-columns:1fr}}.spine-detail__info dl{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:14px}.spine-detail__info dt{color:var(--text-muted);font-weight:500}.spine-detail__info dd{word-break:break-word}.spine-preview{display:flex;flex-direction:column;gap:12px}.spine-preview__canvas-wrap{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:3 / 4}.spine-preview__canvas-wrap canvas{width:100%;height:100%;display:block}.spine-preview__controls{display:flex;align-items:center;gap:8px;font-size:14px}.spine-preview__controls select{flex:1}.spine-preview__error{padding:40px;text-align:center;color:var(--text-muted)}.toast-container{position:fixed;bottom:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px}.toast{padding:12px 20px;border-radius:var(--radius);font-size:14px;color:#fff;opacity:0;transform:translate(40px);transition:opacity .3s,transform .3s}.toast--visible{opacity:1;transform:translate(0)}.toast--success{background:var(--success)}.toast--error{background:var(--danger)}.toast--info{background:var(--primary)}.error{color:var(--danger)}.btn--sm{padding:4px 10px;font-size:12px}.expressions-section{margin-top:24px}.expressions-section h2{font-size:18px;margin-bottom:12px}.expr-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:20px}.expr-table th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);color:var(--text-muted);font-weight:500}.expr-table td{padding:8px 10px;border-bottom:1px solid var(--border)}.expr-table tr:hover td{background:var(--surface-hover)}.expr-table__actions{display:flex;gap:6px}.expr-add-form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.expr-add-form h3{font-size:15px;margin-bottom:12px}.expr-add-form__fields{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}.expr-add-form__fields .input{flex:1;min-width:120px}.expr-add-form__fields .btn{flex-shrink:0}