@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================================
   Design System — DD Beat Downloader
   Dark theme, purple/violet accent, glassmorphism
   ============================================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a28;
  --bg-card: rgba(26, 26, 40, 0.7);
  --bg-glass: rgba(26, 26, 40, 0.5);
  --bg-glass-hover: rgba(35, 35, 55, 0.6);
  --bg-input: rgba(20, 20, 35, 0.8);
  --border-color: rgba(124, 58, 237, 0.15);
  --border-hover: rgba(124, 58, 237, 0.35);
  --text-primary: #f0f0f5;
  --text-secondary: #9d9db5;
  --text-muted: #6b6b85;
  --accent: #7C3AED;
  --accent-light: #A78BFA;
  --accent-dark: #4C1D95;
  --accent-glow: rgba(124, 58, 237, 0.25);
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --danger: #EF4444;
  --info: #3B82F6;
  --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #4C1D95 100%);
  --gradient-bg: linear-gradient(135deg, #0a0a0f 0%, #12121a 50%, #0f0a1a 100%);
  --gradient-card: linear-gradient(135deg, rgba(124,58,237,0.08) 0%, rgba(76,29,149,0.04) 100%);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(124,58,237,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gradient-bg);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--accent-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============ Typography ============ */
h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: 1.125rem; font-weight: 600; }
a { color: var(--accent-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border: none; border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-primary); color: white;
  box-shadow: 0 4px 12px rgba(124,58,237,0.3);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(124,58,237,0.45); transform: translateY(-1px); }

.btn-accent {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%); color: #1a1a28;
  box-shadow: 0 4px 12px rgba(245,158,11,0.3); font-weight: 700;
}
.btn-accent:hover { box-shadow: 0 6px 20px rgba(245,158,11,0.45); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-glass); color: var(--text-primary);
  border: 1px solid var(--border-color); backdrop-filter: blur(10px);
}
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-glass-hover); }

.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-color); }
.btn-ghost:hover { border-color: var(--border-hover); color: var(--text-primary); }

.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-sm { padding: 6px 14px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ============ Inputs ============ */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 0.8125rem; font-weight: 500; color: var(--text-secondary); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.input, input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
  width: 100%; padding: 12px 16px; background: var(--bg-input);
  border: 1px solid var(--border-color); border-radius: var(--radius-sm);
  color: var(--text-primary); font-family: inherit; font-size: 0.9375rem;
  transition: var(--transition); outline: none;
}
.input:focus, input:focus, select:focus, textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.input::placeholder, input::placeholder { color: var(--text-muted); }
select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239d9db5' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
select option { background: var(--bg-secondary); color: var(--text-primary); }

/* ============ Cards ============ */
.card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 24px;
  backdrop-filter: blur(12px); transition: var(--transition);
}
.card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-glow); }

/* ============ Glass ============ */
.glass {
  background: var(--bg-glass); backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-color); border-radius: var(--radius-lg);
}

/* ============ Auth Page ============ */
.auth-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
  background: var(--gradient-bg);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}
@keyframes gradientShift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

.auth-card {
  width: 100%; max-width: 440px; padding: 40px;
  box-shadow: var(--shadow-lg);
}
.auth-header { text-align: center; margin-bottom: 32px; }
.auth-header .logo { font-size: 1.75rem; font-weight: 800; display: flex; align-items: center; justify-content: center; gap: 10px; }
.auth-header .logo span { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.auth-header p { color: var(--text-muted); margin-top: 6px; font-size: 0.9rem; }
.link-accent { color: var(--accent-light); font-weight: 600; }
.link-accent:hover { color: var(--accent); }

/* ============ App Layout ============ */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px; min-height: 100vh; padding: 24px 16px;
  background: var(--bg-secondary); border-right: 1px solid var(--border-color);
  display: flex; flex-direction: column; position: fixed; top: 0; left: 0; z-index: 100;
  border-radius: 0;
}
.sidebar-header { padding: 0 8px 20px; border-bottom: 1px solid var(--border-color); margin-bottom: 16px; }
.logo-sm { font-size: 1.25rem; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.logo-sm span { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 12px;
  border-radius: var(--radius-sm); color: var(--text-secondary);
  font-size: 0.875rem; font-weight: 500; cursor: pointer; transition: var(--transition);
  text-decoration: none;
}
.nav-item:hover { background: var(--bg-glass-hover); color: var(--text-primary); }
.nav-item.active { background: var(--accent-glow); color: var(--accent-light); border: 1px solid var(--border-hover); }

.sidebar-footer { border-top: 1px solid var(--border-color); padding-top: 16px; }
.user-info { display: flex; align-items: center; gap: 12px; padding: 8px; }

.main-content { flex: 1; margin-left: 260px; padding: 32px; min-height: 100vh; }

/* ============ Search Bar ============ */
.search-bar {
  display: flex; gap: 12px; padding: 12px 20px; margin-bottom: 24px;
  border-radius: var(--radius-xl); align-items: center;
}
.search-bar .search-input {
  flex: 1; padding: 12px 20px; font-size: 1rem; min-width: 0;
  background: transparent; border: none; color: var(--text-primary);
}
.search-bar .search-input:focus { box-shadow: none; }

/* Filtros inline na barra de busca — aparecem só quando há resultados (#search-filters não-hidden) */
.search-bar #search-filters { display: flex; gap: 6px; align-items: center; flex-wrap: nowrap; }
.search-bar #search-filters.hidden { display: none; }
.filter-select {
  padding: 6px 10px; font-size: .78rem; min-width: 80px;
  background: rgba(7,6,13,0.5); border: 1px solid rgba(167,139,250,0.18);
  border-radius: 8px; color: var(--text-primary);
  cursor: pointer; transition: border-color .15s, background .15s;
}
.filter-select:hover { border-color: rgba(167,139,250,0.4); background: rgba(20,16,35,0.7); }
.filter-select:focus { outline: none; border-color: rgba(167,139,250,0.6); }
/* Options com count=0 ficam cinza escuro / não clicáveis pra dropdown mostrar o universo todo */
.filter-select option:disabled { color: rgba(120, 113, 138, 0.55); background: rgba(7,6,13,0.3); }

/* Generic filter bar reutilizável (Em Alta, Crates, Histórico, etc).
   Importante: usa flex horizontal e sobrepõe o `.input { width: 100% }` global
   pra não estourar cada filtro em nova linha. */
.filter-bar {
  display: flex; flex-wrap: nowrap; gap: 8px; align-items: center;
  padding: 10px 14px; margin-bottom: 14px;
  background: rgba(20,16,35,0.4); border: 1px solid rgba(167,139,250,0.12);
  border-radius: 12px;
  overflow-x: auto; /* mobile: rolagem lateral se não couber */
}
.filter-bar .filter-select,
.filter-bar .filter-query {
  width: auto; /* override .input width:100% global */
  flex-shrink: 0;
}
.filter-bar .filter-query {
  flex: 1 1 180px; min-width: 140px;
  padding: 6px 10px; font-size: .8rem;
  background: rgba(7,6,13,0.5); border: 1px solid rgba(167,139,250,0.18);
  border-radius: 8px; color: var(--text-primary);
}
.filter-bar .filter-query:focus { outline: none; border-color: rgba(167,139,250,0.5); }

@media (max-width: 900px) {
  .filter-bar { flex-wrap: wrap; }
}
@media (max-width: 720px) {
  .filter-bar { padding: 8px; gap: 6px; }
  .filter-bar .filter-select { min-width: 64px; font-size: .7rem; padding: 4px 6px; }
  /* Collection card actions: 4 botões em mobile precisam quebrar bonitinho */
  .collection-card-wrap .track-actions {
    flex-wrap: wrap;
    gap: 6px !important;
  }
  .collection-card-wrap .track-actions .btn {
    font-size: .72rem !important;
    padding: 5px 9px !important;
  }
  /* Painel de tracks expandido: row compactada em mobile */
  .collection-track-row {
    grid-template-columns: 22px 48px 1fr !important;
    grid-template-rows: auto auto !important;
    padding: 6px 8px !important;
  }
  .collection-track-row .track-actions {
    grid-column: 1 / -1;
    justify-content: flex-end;
    margin-top: 4px;
  }
}

/* Wrapper que envolve o card de coleção + o painel de tracks expansível.
   Cada wrapper ocupa 1 célula do results-grid; o painel fica embaixo do
   card (full width do wrap) quando expandido. */
.collection-card-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Collection tracks panel — exibida ao clicar "Ver faixas" num card de
   release/playlist/chart/artist. Lista vertical com track rows compactas. */
.collection-tracks-panel {
  margin-top: 12px;
  background: rgba(20, 16, 35, 0.4);
  border: 1px solid rgba(167, 139, 250, 0.18);
  border-radius: 12px;
  padding: 12px;
}
.collection-tracks-panel.hidden { display: none; }
.collection-tracks-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.collection-track-row {
  display: grid;
  grid-template-columns: 28px 56px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 8px 10px;
  background: rgba(7, 6, 13, 0.4);
  border: 1px solid rgba(167, 139, 250, 0.08);
  border-radius: 8px;
  transition: background .15s, border-color .15s;
}
.collection-track-row:hover {
  background: rgba(124, 58, 237, 0.06);
  border-color: rgba(167, 139, 250, 0.25);
}
.collection-track-row .track-position {
  font-family: monospace;
  font-size: .85rem;
  color: #A78BFA;
  text-align: center;
  font-weight: 700;
}
.collection-track-row .track-artwork {
  width: 56px;
  height: 56px;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}
.collection-track-row .track-artwork img {
  width: 100%; height: 100%; object-fit: cover;
}
.collection-track-row .track-artwork .placeholder {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%; background: rgba(124,58,237,0.15); font-size: 1.5rem;
}
.collection-track-row .track-info {
  min-width: 0; /* permite ellipsis */
}
.collection-track-row .track-title {
  font-weight: 600;
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.collection-track-row .track-artist {
  font-size: .75rem;
  color: #9990b8;
  margin-bottom: 4px;
}
.collection-track-row .track-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

/* Histórico — linhas-filhas de batch (tracks expandidas dentro de playlist/release).
   Recebe fundo levemente roxo + borda esquerda accent pra diferenciar visualmente
   de tracks avulsas que ficam na raiz do histórico. */
.batch-child-row {
  background: rgba(124, 58, 237, 0.05);
  box-shadow: inset 3px 0 0 rgba(167, 139, 250, 0.45);
}
.batch-child-row:hover {
  background: rgba(124, 58, 237, 0.10);
}

/* Histórico — server-side filters compactos numa linha só */
.history-filters-compact {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin-bottom: 14px; padding: 10px 14px;
  background: rgba(20,16,35,0.4); border: 1px solid rgba(167,139,250,0.12);
  border-radius: 12px;
}
.history-filters-compact .compact-input,
.history-filters-compact .compact-select,
.history-filters-compact .compact-date {
  width: auto; min-width: 110px; padding: 6px 10px; font-size: .78rem;
  background: rgba(7,6,13,0.5); border: 1px solid rgba(167,139,250,0.18);
  border-radius: 8px; color: var(--text-primary);
  cursor: pointer;
}
.history-filters-compact .compact-input { min-width: 180px; flex: 1 1 180px; cursor: text; }
.history-filters-compact .compact-date { min-width: 130px; }
.history-filters-compact .hf-fav-label {
  display: flex; align-items: center; gap: 4px;
  font-size: .8rem; color: var(--text-muted); cursor: pointer; padding: 4px 8px;
}
@media (max-width: 720px) {
  .history-filters-compact { padding: 8px; gap: 6px; }
  .history-filters-compact .compact-select,
  .history-filters-compact .compact-date { min-width: 90px; font-size: .7rem; padding: 4px 6px; }
}

/* Mobile: filtros viram segunda linha pra não estourar */
@media (max-width: 900px) {
  .search-bar { flex-wrap: wrap; }
  .search-bar .search-input { flex: 1 1 100%; }
  .search-bar #search-filters { flex: 1 1 100%; overflow-x: auto; padding-bottom: 4px; }
  .filter-select { flex-shrink: 0; min-width: 70px; font-size: .72rem; padding: 5px 8px; }
}

/* ============ Track Card ============ */
.results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }

.track-card {
  display: flex; gap: 14px; padding: 16px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); backdrop-filter: blur(12px);
  transition: var(--transition); cursor: default;
}
.track-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-glow); transform: translateY(-2px); }

.release-card { border-color: rgba(245,158,11,0.2); }
.release-card:hover { border-color: rgba(245,158,11,0.4); box-shadow: 0 0 20px rgba(245,158,11,0.1); }

.track-artwork {
  width: 72px; height: 72px; border-radius: var(--radius-sm);
  background: var(--bg-tertiary); flex-shrink: 0; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.track-artwork img { width: 100%; height: 100%; object-fit: cover; }
.track-artwork .placeholder { font-size: 1.5rem; color: var(--text-muted); }

.track-info { flex: 1; min-width: 0; }
.track-title { font-weight: 600; font-size: 0.9375rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-artist { color: var(--text-secondary); font-size: 0.8125rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.track-meta { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
.track-meta span { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }

.track-actions { display: flex; flex-direction: column; justify-content: center; gap: 6px; flex-shrink: 0; }

/* ============ Badges ============ */
.badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  border-radius: 100px; font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
}
.badge-success { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--error); }
.badge-error { background: rgba(239,68,68,0.15); color: var(--error); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--info); }

/* ============ Avatars ============ */
.avatar-img {
  width: 36px; height: 36px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--border-color);
}
.avatar-img.avatar-sm { width: 28px; height: 28px; }
.avatar-img.avatar-lg { width: 56px; height: 56px; }

.avatar-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px;
  max-height: 160px; overflow-y: auto; padding: 8px;
  background: var(--bg-input); border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}
.avatar-option {
  width: 48px; height: 48px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; transition: var(--transition);
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.avatar-option img { width: 100%; height: 100%; }
.avatar-option:hover { border-color: var(--accent-light); transform: scale(1.1); }
.avatar-option.selected { border-color: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }

.avatar-preview {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.avatar-picker {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px;
  padding: 8px; background: var(--bg-tertiary); border-radius: var(--radius-sm);
  border: 1px solid var(--border-color); margin-top: 8px;
}
.avatar-option-sm {
  width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
  overflow: hidden; transition: var(--transition);
  border: 2px solid transparent;
}
.avatar-option-sm:hover { border-color: var(--accent); transform: scale(1.15); }
.avatar-option-sm img { width: 100%; height: 100%; }

/* ============ Table ============ */
.table-container { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--border-color); }
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 16px; text-align: left; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); background: var(--bg-tertiary); border-bottom: 1px solid var(--border-color); }
td { padding: 12px 16px; font-size: 0.875rem; border-bottom: 1px solid rgba(124,58,237,0.06); }
tr:hover td { background: rgba(124,58,237,0.04); }

/* ============ Toast ============ */
#toast-container { position: fixed; top: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 14px 20px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border-color);
  backdrop-filter: blur(16px); box-shadow: var(--shadow-md);
  font-size: 0.875rem; min-width: 280px; max-width: 400px;
  display: flex; align-items: center; gap: 10px;
  transform: translateX(100px); opacity: 0; transition: var(--transition);
}
.toast.show { transform: translateX(0); opacity: 1; }
.toast-success { border-color: var(--success); }
.toast-error { border-color: var(--error); }
.toast-info { border-color: var(--info); }
.toast-warning { border-color: var(--warning); }

/* ============ Modal ============ */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px); z-index: 1000;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  animation: fadeIn 0.2s ease-out;
}
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 32px;
  width: 100%; max-width: 600px; max-height: 85vh; overflow-y: auto;
  box-shadow: var(--shadow-lg); animation: scaleIn 0.2s ease-out;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.modal-header h3 { font-size: 1.25rem; font-weight: 700; }
.form-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 24px; }

/* ============ Stats ============ */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  padding: 20px; background: var(--gradient-card);
  border: 1px solid var(--border-color); border-radius: var(--radius-md);
  backdrop-filter: blur(12px); text-align: center;
}
.stat-value { font-size: 2rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.8125rem; color: var(--text-muted); margin-top: 4px; }

/* ============ Settings Form ============ */
.settings-form { padding: 24px; display: flex; flex-direction: column; gap: 4px; }

/* ============ Section Headers ============ */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.section-title { font-size: 1.25rem; font-weight: 700; }

/* ============ Batch Progress ============ */
.batch-progress {
  position: fixed; bottom: 24px; right: 24px; z-index: 900;
  animation: fadeIn 0.3s ease-out;
}
.batch-progress-inner {
  padding: 20px 28px; min-width: 320px;
  box-shadow: var(--shadow-lg);
}
.batch-progress-inner h4 { font-size: 0.9375rem; margin-bottom: 12px; }
.progress-bar {
  width: 100%; height: 8px; background: var(--bg-tertiary);
  border-radius: 4px; overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* ============ Page Tabs ============ */
.page-view { display: none; }
.page-view.active { display: block; animation: fadeIn 0.3s ease-out; }

/* ============ Empty State ============ */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state .icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.5; }
.empty-state p { font-size: 0.9375rem; }

/* ============ Spinner ============ */
.spinner { width: 24px; height: 24px; border: 3px solid var(--border-color); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; }
.loading-overlay { display: flex; align-items: center; justify-content: center; padding: 48px; }

/* ============ Pagination ============ */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 24px; }

/* ============ Animations ============ */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0%,100% { transform: translate(0,0); } 50% { transform: translate(20px, -20px); } }

/* ============ Utilities ============ */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.8125rem; }
.text-xs { font-size: 0.6875rem; }
.text-danger { color: var(--error); }
.font-semibold { font-weight: 600; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .sidebar { width: 100%; height: auto; min-height: auto; position: relative; border-right: none; border-bottom: 1px solid var(--border-color); flex-direction: row; align-items: center; padding: 12px 16px; border-radius: 0; }
  .sidebar-header { padding: 0; margin: 0; border: none; }
  .sidebar-nav { flex-direction: row; overflow-x: auto; gap: 2px; }
  .sidebar-footer { display: none; }
  .app-layout { flex-direction: column; }
  .main-content { margin-left: 0; padding: 20px; }
  .results-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .modal { max-width: 95vw; padding: 20px; }
  .avatar-grid { grid-template-columns: repeat(4, 1fr); }
  .auth-card { padding: 24px; }
}