/* === RESET & BASE === */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #F8F9FA;
  --surface: #FFFFFF;
  --primary: #0057B8;
  --accent: #00A9E5;
  --text: #1A1A1A;
  --text-secondary: #6B7280;
  --border: #E5E7EB;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.12);
}
html, body { font-family: 'Inter','Noto Sans SC',system-ui,sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === LAYOUT === */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--surface); border-right: 1px solid var(--border); position: fixed; top: 0; left: 0; height: 100vh; display: flex; flex-direction: column; }
.sidebar-header { padding: 20px 24px; border-bottom: 1px solid var(--border); }
.logo-title { font-size: 18px; font-weight: 700; color: var(--primary); }
.logo-subtitle { font-size: 12px; color: var(--text-secondary); display: block; margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 16px 0; overflow-y: auto; }
.nav-section { margin-bottom: 8px; }
.nav-section-title { font-size: 11px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; padding: 8px 24px 4px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 24px; color: var(--text-secondary); font-size: 14px; border-radius: 0; transition: all 0.15s; cursor: pointer; }
.nav-item i { font-size: 16px; width: 20px; text-align: center; flex-shrink: 0; }
.nav-item:hover { color: var(--text); background: var(--bg); text-decoration: none; }
.nav-item.active { color: var(--primary); background: rgba(0,87,184,0.06); font-weight: 500; }
.main-content { flex: 1; margin-left: 220px; min-height: 100vh; }
.top-bar { height: 56px; background: var(--surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 32px; position: sticky; top: 0; z-index: 10; }
.top-bar-left { display: flex; align-items: center; gap: 12px; }
.top-bar-right { display: flex; align-items: center; gap: 16px; }
.breadcrumb { font-size: 14px; color: var(--text-secondary); }
.breadcrumb i { margin-right: 8px; color: var(--text-secondary); }
.page-content { padding: 32px; max-width: 1400px; }
.page-title { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 24px; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }

/* === BUTTONS === */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius); font-size: 14px; font-weight: 500; cursor: pointer; border: 1px solid transparent; transition: all 0.15s; }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: #0048a0; }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--bg); border-color: #d1d5db; }
.btn-icon { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: var(--radius); background: transparent; border: 1px solid var(--border); color: var(--text-secondary); cursor: pointer; transition: all 0.15s; }
.btn-icon:hover { background: var(--bg); color: var(--text); }
.btn-sm { padding: 5px 10px; font-size: 13px; }

/* === CARDS & PANELS === */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 16px; box-shadow: var(--shadow); transition: box-shadow 0.2s; }
.card:hover { box-shadow: var(--shadow-hover); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.card-title { font-size: 15px; font-weight: 600; color: var(--text); display: flex; align-items: center; gap: 8px; }
.card-title i { color: var(--primary); }
.panel-action { font-size: 13px; color: var(--primary); cursor: pointer; }
.panel-action:hover { text-decoration: underline; }

/* === STATS === */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; display: flex; align-items: center; gap: 16px; box-shadow: var(--shadow); }
.stat-icon { width: 44px; height: 44px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.stat-icon.blue { background: rgba(0,87,184,0.1); color: var(--primary); }
.stat-icon.green { background: rgba(16,185,129,0.1); color: var(--success); }
.stat-icon.orange { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-icon.purple { background: rgba(139,92,246,0.1); color: #8B5CF6; }
.stat-value { font-size: 26px; font-weight: 700; color: var(--text); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }

/* === TABLES === */
.table-container { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th { text-align: left; padding: 10px 14px; font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 2px solid var(--border); background: var(--bg); }
.data-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #F9FAFB; }

/* === FORM ELEMENTS === */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.form-input, .select-input { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; color: var(--text); background: var(--surface); outline: none; transition: border-color 0.15s; }
.form-input:focus, .select-input:focus { border-color: var(--primary); }
.select-input { cursor: pointer; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* === BADGES & TAGS === */
.tag { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 20px; font-size: 12px; font-weight: 500; }
.tag-blue { background: rgba(0,87,184,0.1); color: var(--primary); }
.tag-green { background: rgba(16,185,129,0.1); color: var(--success); }
.tag-orange { background: rgba(245,158,11,0.1); color: var(--warning); }
.tag-gray { background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border); }
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 500; }
.badge-success { background: rgba(16,185,129,0.1); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.1); color: var(--danger); }
.badge-primary { background: rgba(0,87,184,0.1); color: var(--primary); }

/* === FILTER TABS === */
.filter-tabs { display: flex; gap: 4px; margin-bottom: 20px; flex-wrap: wrap; }
.filter-tab { padding: 6px 14px; border-radius: 20px; font-size: 13px; color: var(--text-secondary); cursor: pointer; border: 1px solid transparent; transition: all 0.15s; background: var(--surface); border: 1px solid var(--border); }
.filter-tab:hover { border-color: var(--primary); color: var(--primary); }
.filter-tab.active { background: var(--primary); color: white; border-color: var(--primary); }

/* === SEARCH BOX === */
.search-box { display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 12px; }
.search-box input { border: none; background: transparent; outline: none; font-size: 14px; color: var(--text); width: 200px; }
.search-box i { color: var(--text-secondary); }

/* === TRENDING (Homepage) === */
.trending-item { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.trending-item:last-child { border-bottom: none; }
.trending-rank { font-size: 16px; font-weight: 700; color: var(--text-secondary); width: 24px; text-align: center; flex-shrink: 0; }
.trending-rank.rank-1 { color: var(--primary); }
.trending-rank.rank-2 { color: var(--accent); }
.trending-rank.rank-3 { color: #8B5CF6; }
.trending-body { flex: 1; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.trending-title { font-size: 14px; font-weight: 500; color: var(--text); }
.trending-bar { height: 3px; background: var(--border); border-radius: 2px; margin-top: 5px; overflow: hidden; }
.trending-bar-fill { height: 100%; border-radius: 2px; }
.trending-bar-fill.hot { background: linear-gradient(90deg, var(--danger), #f87171); }
.trending-bar-fill.warm { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.trending-bar-fill.cool { background: var(--accent); }
.trending-stats { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-secondary); margin-top: 3px; }
.trending-stats span { display: flex; align-items: center; gap: 4px; }
.trend-signal { font-size: 13px; flex-shrink: 0; margin-left: auto; }
.trend-up { color: var(--success); }
.trend-down { color: var(--danger); }
.trend-stable { color: var(--text-secondary); }

/* === SCRIPT LIST === */
.script-item { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--border); gap: 16px; }
.script-item:last-child { border-bottom: none; }
.script-info { flex: 1; }
.script-title { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 4px; }
.script-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-secondary); }
.script-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* === GENERATION === */
.generation-item { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.generation-item:last-child { border-bottom: none; }
.generation-thumb { width: 64px; height: 40px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 20px; flex-shrink: 0; }
.generation-info { flex: 1; }
.generation-title { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 3px; }
.generation-meta { font-size: 12px; color: var(--text-secondary); display: flex; gap: 10px; }
.progress-bar { width: 100%; height: 4px; background: var(--border); border-radius: 2px; margin-top: 6px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 2px; transition: width 0.3s; }

/* === MATERIALS GRID === */
.materials-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
.material-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all 0.2s; cursor: pointer; }
.material-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-1px); }
.material-thumb { height: 100px; display: flex; align-items: center; justify-content: center; font-size: 32px; color: white; }
.material-thumb.blue { background: linear-gradient(135deg, #0057B8, #00A9E5); }
.material-thumb.green { background: linear-gradient(135deg, #10B981, #34D399); }
.material-thumb.orange { background: linear-gradient(135deg, #F59E0B, #FBBF24); }
.material-thumb.purple { background: linear-gradient(135deg, #8B5CF6, #A78BFA); }
.material-info { padding: 12px; }
.material-name { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.material-meta { font-size: 12px; color: var(--text-secondary); display: flex; justify-content: space-between; }
.material-actions { padding: 8px 12px; border-top: 1px solid var(--border); display: flex; gap: 6px; justify-content: flex-end; }

/* === ACTIVITY === */
.activity-item { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.activity-item:last-child { border-bottom: none; }
.activity-icon { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; }
.activity-icon.green { background: rgba(16,185,129,0.1); color: var(--success); }
.activity-icon.orange { background: rgba(245,158,11,0.1); color: var(--warning); }
.activity-icon.blue { background: rgba(0,87,184,0.1); color: var(--primary); }
.activity-title { font-size: 13px; color: var(--text); line-height: 1.4; }
.activity-time { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* === PAGINATION === */
.pagination { display: flex; align-items: center; justify-content: space-between; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.pagination-info { font-size: 13px; color: var(--text-secondary); }
.pagination-buttons { display: flex; gap: 4px; }

/* === GRID LAYOUTS === */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.two-col-layout { display: grid; grid-template-columns: 1fr 320px; gap: 24px; }
.main-column { display: flex; flex-direction: column; gap: 24px; }
.right-column { display: flex; flex-direction: column; gap: 24px; }

/* === VIDEO PREVIEW === */
.video-preview-area { background: var(--bg); border: 2px dashed var(--border); border-radius: var(--radius); height: 200px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-secondary); gap: 8px; }
.video-preview-area i { font-size: 36px; }
.video-preview-area p { font-size: 13px; }

/* === STORAGE BAR === */
.storage-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; padding: 12px 16px; background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); }
.storage-text { font-size: 13px; color: var(--text-secondary); flex: 1; }
.storage-used { font-weight: 600; color: var(--text); }

/* === USER MENU === */
.user-menu { display: flex; align-items: center; gap: 10px; cursor: pointer; padding: 6px 10px; border-radius: var(--radius); transition: background 0.15s; }
.user-menu:hover { background: var(--bg); }
.user-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: white; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; flex-shrink: 0; }
.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 13px; font-weight: 500; color: var(--text); line-height: 1.2; }
.user-role { font-size: 11px; color: var(--text-secondary); }

/* === QUICK ACTIONS === */
.quick-actions { display: flex; flex-direction: column; gap: 8px; padding: 4px 0; }
.quick-action-btn { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: var(--radius); background: var(--bg); border: 1px solid var(--border); cursor: pointer; transition: all 0.15s; font-size: 13px; color: var(--text); font-family: inherit; text-align: left; width: 100%; }
.quick-action-btn:hover { border-color: var(--primary); background: rgba(0,87,184,0.04); }
.quick-action-btn i { font-size: 14px; color: var(--primary); width: 18px; text-align: center; }
.quick-action-btn .qa-label { flex: 1; }
.quick-action-btn .qa-arrow { font-size: 12px; color: var(--text-secondary); }

/* === UTILITY === */
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-center { text-align: center; }
.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.hidden { display: none; }
.flex-wrap { flex-wrap: wrap; }