/* ============================================
 * MergeUi Components Preview Stylesheet
 * 작성: C(프론트) | 2026-05-05 (D-1)
 * 단일 출처: 카탈로그(`pages/public/components.html`) +
 *            상세(`pages/public/components-detail.html`) +
 *            구독자 라이브러리(`pages/subscriber/library.html`)
 *
 * 목적: DB 시드의 클래스 기반 preview_html이 카탈로그에서 unstyled로
 *       보이는 결함 해소. 모든 컴포넌트 클래스(.btn, .kpi-card 등)를
 *       단일 파일로 정의 → 다크/라이트 토큰 자동 적용 + 학습 정합성 보존.
 *
 * 토큰: src/styles/tokens.css의 --merge-* 변수 의존
 * ============================================ */

/* ===== 1. BUTTONS (4) ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;font-family:inherit;font-size:14px;font-weight:600;line-height:1;border:1px solid transparent;border-radius:8px;cursor:pointer;transition:all .15s ease;-webkit-tap-highlight-color:transparent}
.btn:focus-visible{outline:2px solid var(--merge-brand);outline-offset:2px}
.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
.btn-primary{background:var(--merge-brand);color:#FFFFFF}
.btn-primary:hover{background:var(--merge-brand-light)}
.btn-secondary{background:transparent;color:var(--merge-text-primary);border-color:var(--merge-border-strong)}
.btn-secondary:hover{border-color:var(--merge-brand);color:var(--merge-brand-light)}
.btn-ghost{background:transparent;color:var(--merge-text-secondary)}
.btn-ghost:hover{background:var(--merge-bg-surface);color:var(--merge-text-primary)}
.btn-destructive{background:#EF4444;color:#FFFFFF}
.btn-destructive:hover{background:#DC2626}

/* ===== 2. CARDS (4) ===== */
.kpi-card{display:inline-flex;flex-direction:column;gap:4px;padding:18px 22px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px;min-width:180px}
.kpi-label{font-size:11px;font-weight:600;color:var(--merge-text-muted);text-transform:uppercase;letter-spacing:.4px}
.kpi-value{font-size:26px;font-weight:800;color:var(--merge-text-primary);letter-spacing:-.5px}
.kpi-delta{font-size:12px;font-weight:600;margin-top:2px}
.kpi-delta.up{color:var(--merge-success)} .kpi-delta.down{color:#EF4444}

.metric-card{display:flex;flex-direction:column;gap:6px;padding:18px 22px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px;min-width:200px}
.metric-label{font-size:11px;font-weight:600;color:var(--merge-text-muted);text-transform:uppercase;letter-spacing:.4px}
.metric-value{font-size:26px;font-weight:800;color:var(--merge-text-primary);letter-spacing:-.5px}
.metric-spark{height:30px;background:linear-gradient(180deg,transparent 50%,rgba(108,92,231,0.1) 100%);border-radius:4px;position:relative}

.feature-card{padding:24px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:14px;max-width:280px}
.feature-card .feature-icon{width:40px;height:40px;border-radius:10px;background:rgba(108,92,231,.12);color:var(--merge-brand-light);display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:12px}
.feature-card h3{font-size:15px;font-weight:700;color:var(--merge-text-primary);margin:0 0 6px}
.feature-card p{font-size:13px;color:var(--merge-text-secondary);margin:0;line-height:1.5}

.stat-row{display:flex;gap:24px;padding:18px 24px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px}
.stat-row > div{display:flex;flex-direction:column;gap:2px}
.stat-row b{font-size:18px;font-weight:800;color:var(--merge-text-primary)}
.stat-row span{font-size:11px;color:var(--merge-text-muted);text-transform:uppercase;letter-spacing:.3px}

/* ===== 3. TABLES (3) ===== */
.table{width:100%;border-collapse:collapse;font-size:13px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:8px;overflow:hidden}
.table th{text-align:left;padding:10px 14px;background:var(--merge-bg-surface);font-size:11px;font-weight:700;color:var(--merge-text-muted);text-transform:uppercase;letter-spacing:.3px;border-bottom:1px solid var(--merge-border)}
.table td{padding:10px 14px;border-bottom:1px solid var(--merge-border);color:var(--merge-text-primary)}
.table tr:last-child td{border-bottom:none}
.table .sort{font-size:9px;color:var(--merge-text-muted);margin-left:4px}
.row-act{padding:4px 10px;background:var(--merge-bg-surface);border:1px solid var(--merge-border);border-radius:6px;font-size:11px;font-weight:600;color:var(--merge-text-secondary);cursor:pointer;margin-right:4px}
.row-act.danger{color:#FCA5A5;border-color:rgba(239,68,68,.2)}

/* ===== 4. FORMS (5: input/select/checkbox/radio/switch) ===== */
.field{display:inline-flex;flex-direction:column;gap:6px;min-width:240px}
.field label{font-size:12px;font-weight:600;color:var(--merge-text-secondary)}
.field input[type="text"],.field input[type="email"],.field input[type="password"],.field select{padding:9px 12px;background:var(--merge-bg-surface);border:1px solid var(--merge-border-strong);border-radius:8px;font:inherit;font-size:13px;color:var(--merge-text-primary);outline:none;transition:border-color .15s}
.field input:focus,.field select:focus{border-color:var(--merge-brand)}
.field-checkbox,.field-radio{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--merge-text-primary);cursor:pointer}
.field-checkbox input,.field-radio input{accent-color:var(--merge-brand);width:16px;height:16px}

/* Switch (5/5 신규) */
.switch{display:inline-flex;align-items:center;gap:12px;cursor:pointer;user-select:none}
.switch input{position:absolute;opacity:0;pointer-events:none}
.switch-slider{position:relative;width:44px;height:24px;background:var(--merge-bg-surface);border:1px solid var(--merge-border-strong);border-radius:9999px;transition:all .2s ease;flex-shrink:0}
.switch-slider::after{content:'';position:absolute;top:2px;left:2px;width:18px;height:18px;background:var(--merge-text-muted);border-radius:50%;transition:transform .2s cubic-bezier(.16,1,.3,1),background .2s}
.switch input:checked + .switch-slider{background:var(--merge-brand);border-color:var(--merge-brand)}
.switch input:checked + .switch-slider::after{transform:translateX(20px);background:#FFFFFF}
.switch-label{font-size:13px;font-weight:500;color:var(--merge-text-primary)}

/* ===== 5. CHARTS (4) — SVG는 자체 색 보유, 컨테이너만 ===== */
.chart-stub{display:inline-block;padding:8px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:8px;min-width:200px;min-height:80px}

/* ===== 6. FEEDBACK (6) ===== */
.alert{display:inline-flex;align-items:center;gap:10px;padding:10px 14px;background:rgba(108,92,231,.10);border:1px solid rgba(108,92,231,.25);border-radius:8px;font-size:13px;color:var(--merge-brand-light);max-width:320px}
.toast{display:inline-flex;align-items:center;gap:10px;padding:12px 16px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:10px;box-shadow:0 8px 24px -8px rgba(0,0,0,.4);font-size:13px;color:var(--merge-text-primary)}
.ui-badge{display:inline-flex;align-items:center;padding:2px 9px;font-size:10px;font-weight:700;letter-spacing:.3px;border-radius:9999px;text-transform:uppercase}
.ui-badge.new{background:rgba(108,92,231,.15);color:var(--merge-brand-light)}
.ui-badge.active{background:rgba(34,197,94,.15);color:var(--merge-success)}
.ui-badge.trial{background:rgba(251,191,36,.15);color:var(--merge-warning)}
.ui-badge.failed{background:rgba(239,68,68,.15);color:#FCA5A5}
.modal-stub{display:inline-flex;flex-direction:column;gap:8px;padding:16px 20px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px;max-width:320px;box-shadow:0 16px 32px -8px rgba(0,0,0,.4)}

/* Skeleton (5/5 신규) */
.skeleton{display:block;background:linear-gradient(90deg,var(--merge-bg-surface) 0%,var(--merge-bg-raised) 50%,var(--merge-bg-surface) 100%);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite;border-radius:6px}
@keyframes skeleton-shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
.skeleton-text{height:14px;width:100%;margin-bottom:8px}
.skeleton-text-sm{height:12px;width:60%}
.skeleton-title{height:20px;width:50%;margin-bottom:12px}
.skeleton-circle{width:40px;height:40px;border-radius:50%}
.skeleton-rect{width:100%;height:120px;border-radius:10px}
.skeleton-card{width:280px;padding:18px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px}
.skeleton-card-header{display:flex;gap:12px;margin-bottom:14px;align-items:center}
.skeleton-card-meta{flex:1}

/* Empty State (5/5 신규) */
.empty-state{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:32px 24px;background:var(--merge-bg-raised);border:1px dashed var(--merge-border-strong);border-radius:12px;max-width:320px}
.empty-state-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--merge-bg-surface);border-radius:11px;color:var(--merge-text-muted);margin-bottom:12px}
.empty-state-title{font-size:14px;font-weight:700;color:var(--merge-text-primary);margin:0 0 4px}
.empty-state-desc{font-size:12px;line-height:1.5;color:var(--merge-text-muted);margin:0 0 14px;max-width:30ch}
.empty-state-action{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--merge-brand);color:#FFFFFF;border:none;border-radius:7px;font:inherit;font-size:12px;font-weight:600;cursor:pointer}

/* ===== 7. NAVIGATION (3): tabs (기존) + breadcrumb + pagination (5/5 신규) ===== */
.tabs{display:inline-flex;background:var(--merge-bg-surface);border:1px solid var(--merge-border);border-radius:10px;padding:4px}
.tabs .tab{padding:8px 14px;background:transparent;border:none;border-radius:6px;font:inherit;font-size:12px;font-weight:600;color:var(--merge-text-muted);cursor:pointer}
.tabs .tab.active{background:var(--merge-bg-raised);color:var(--merge-text-primary)}

.breadcrumb{display:inline-flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--merge-text-muted);padding:0;margin:0;list-style:none}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.breadcrumb a{color:var(--merge-text-muted);text-decoration:none;padding:3px 6px;border-radius:4px}
.breadcrumb a:hover{color:var(--merge-text-primary);background:var(--merge-bg-surface)}
.breadcrumb li[aria-current="page"]{color:var(--merge-text-primary);font-weight:600}
.breadcrumb-sep{opacity:.5}
.breadcrumb-home{display:inline-flex;align-items:center}

.pagination{display:inline-flex;align-items:center;gap:4px;padding:0;margin:0;list-style:none}
.pagination .page-btn{min-width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;padding:0 8px;background:transparent;border:1px solid var(--merge-border);border-radius:7px;font:inherit;font-size:12px;font-weight:600;color:var(--merge-text-secondary);cursor:pointer}
.pagination .page-btn.active{background:var(--merge-brand);border-color:var(--merge-brand);color:#FFFFFF}
.pagination .page-btn[disabled]{opacity:.4;cursor:not-allowed}
.pagination .page-ellipsis{min-width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;color:var(--merge-text-muted)}

/* ===== 8. DISPLAY (2): avatar + accordion (5/5 신규 카테고리) ===== */
.avatar{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--merge-brand),var(--merge-brand-light));color:#FFFFFF;font-weight:600;font-size:13px;flex-shrink:0;user-select:none}
.avatar-sm{width:28px;height:28px;font-size:11px}
.avatar-lg{width:48px;height:48px;font-size:16px}
.avatar-with-status{position:relative}
.avatar-with-status .status-dot{position:absolute;bottom:0;right:0;width:9px;height:9px;border-radius:50%;background:var(--merge-success);border:2px solid var(--merge-bg-raised)}
.avatar-stack{display:inline-flex}
.avatar-stack .avatar{margin-left:-8px;border:2px solid var(--merge-bg-raised)}
.avatar-stack .avatar:first-child{margin-left:0}
.avatar-stack .avatar-more{background:var(--merge-bg-surface);color:var(--merge-text-secondary)}

.accordion{width:100%;max-width:280px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:10px;overflow:hidden}
.accordion-item{border-bottom:1px solid var(--merge-border)}
.accordion-item:last-child{border-bottom:none}
.accordion-summary{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;cursor:pointer;list-style:none;font-size:13px;font-weight:600;color:var(--merge-text-primary)}
.accordion-summary::-webkit-details-marker{display:none}
.accordion-summary svg{transition:transform .2s ease;color:var(--merge-text-muted)}
.accordion-item[open] .accordion-summary svg{transform:rotate(180deg)}
.accordion-content{padding:0 14px 14px;font-size:12px;line-height:1.5;color:var(--merge-text-secondary)}

/* ===== 9. OVERLAY (3): tooltip + modal-confirm + dropdown (5/5 신규 카테고리) ===== */
.tooltip{position:relative;display:inline-flex}
.tip-btn{padding:7px 14px;background:var(--merge-bg-surface);border:1px solid var(--merge-border);border-radius:7px;cursor:pointer;font:inherit;font-size:12px;color:var(--merge-text-primary)}
.tooltip[data-tip]:hover::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);padding:5px 10px;background:var(--merge-text-primary);color:var(--merge-bg-base);font-size:11px;border-radius:5px;white-space:nowrap;z-index:10}
.tooltip[data-tip]:hover::before{content:'';position:absolute;bottom:calc(100% + 2px);left:50%;transform:translateX(-50%);border:5px solid transparent;border-top-color:var(--merge-text-primary);z-index:10}

.modal-backdrop-stub{display:inline-flex;align-items:center;justify-content:center;padding:8px;background:rgba(0,0,0,0.4);border-radius:10px}
.modal{background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:12px;max-width:300px;width:100%;box-shadow:0 16px 32px -8px rgba(0,0,0,.4)}
.modal-header{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--merge-border)}
.modal-header h2{margin:0;font-size:14px;font-weight:700;color:var(--merge-text-primary)}
.modal-close{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:none;background:transparent;color:var(--merge-text-muted);font-size:16px;cursor:pointer}
.modal-body{padding:14px 18px;color:var(--merge-text-secondary);font-size:12px;line-height:1.5}
.modal-footer{display:flex;justify-content:flex-end;gap:6px;padding:12px 18px;border-top:1px solid var(--merge-border)}
.modal-btn{padding:6px 12px;border-radius:6px;font:inherit;font-size:12px;font-weight:600;cursor:pointer;border:1px solid transparent}
.modal-btn-secondary{background:transparent;color:var(--merge-text-secondary);border-color:var(--merge-border-strong)}
.modal-btn-primary{background:var(--merge-brand);color:#FFFFFF}

.dropdown{position:relative;display:inline-block}
.dropdown-toggle{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;background:var(--merge-bg-surface);border:1px solid var(--merge-border-strong);border-radius:7px;font:inherit;font-size:12px;font-weight:600;color:var(--merge-text-primary);cursor:pointer}
.dropdown[data-open="true"] .dropdown-toggle svg{transform:rotate(180deg)}
.dropdown-toggle svg{transition:transform .15s ease}
.dropdown-menu{position:absolute;top:calc(100% + 6px);left:0;min-width:160px;background:var(--merge-bg-raised);border:1px solid var(--merge-border);border-radius:9px;box-shadow:0 12px 28px -8px rgba(0,0,0,.4);padding:5px;z-index:50;opacity:0;visibility:hidden;transform:translateY(-4px);transition:all .15s ease}
.dropdown[data-open="true"] .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-item{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:5px;font-size:12px;color:var(--merge-text-primary);cursor:pointer;text-decoration:none}
.dropdown-item:hover{background:var(--merge-bg-surface)}
.dropdown-divider{height:1px;background:var(--merge-border);margin:3px 0}
.dropdown-item-danger{color:#FCA5A5}
.dropdown-item-icon{width:13px;height:13px;color:var(--merge-text-muted);flex-shrink:0}