/* ============================================
   HF Drive Index — Design System
   Premium dark theme with glassmorphism
   ============================================ */

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

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(22, 22, 35, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-hover: rgba(255, 255, 255, 0.06);
  --bg-input: rgba(255, 255, 255, 0.05);

  --text-primary: #e8e8ed;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-accent: #818cf8;

  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Folder colors */
  --folder-color: #fbbf24;
  --file-color: #94a3b8;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);

  /* Spacing */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Light mode */
:root.light {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(0, 0, 0, 0.02);
  --bg-glass-hover: rgba(0, 0, 0, 0.04);
  --bg-input: rgba(0, 0, 0, 0.04);

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-accent: #6366f1;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
}

/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 15px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-hover);
}

/* ── Animated Background ── */
.bg-pattern {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(139, 92, 246, 0.05), transparent);
  pointer-events: none;
}

/* ── App Container ── */
.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header / Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition-normal);
}

.light .navbar {
  background: rgba(255, 255, 255, 0.85);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-brand svg {
  width: 28px;
  height: 28px;
}

.nav-brand .brand-accent {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── Search Bar ── */
.search-wrapper {
  position: relative;
  max-width: 400px;
  flex: 1;
  margin: 0 1.5rem;
}

.search-input {
  width: 100%;
  height: 38px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0 1rem 0 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-normal);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-glass-hover);
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px;
  height: 16px;
  pointer-events: none;
}

/* ── Icon Buttons ── */
.icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  border: none;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  opacity: 0.9;
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

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

.btn-ghost:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  opacity: 0.9;
}

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.75rem 0;
  font-size: 0.875rem;
  flex-wrap: wrap;
  overflow: hidden;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.breadcrumb-item:hover {
  color: var(--text-accent);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 500;
}

.breadcrumb-separator {
  color: var(--text-muted);
  font-size: 0.75rem;
  user-select: none;
}

.breadcrumb-separator svg {
  width: 14px;
  height: 14px;
}

/* ── Info Bar ── */
.info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.info-bar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.info-bar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── File Table ── */
.file-table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.file-table {
  width: 100%;
  border-collapse: collapse;
}

.file-table thead {
  background: var(--bg-glass);
}

.file-table th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

.file-table th:hover {
  color: var(--text-primary);
}

.file-table th .sort-icon {
  display: inline-block;
  margin-left: 0.25rem;
  opacity: 0.4;
  transition: opacity var(--transition-fast);
}

.file-table th.sorted .sort-icon {
  opacity: 1;
  color: var(--accent);
}

.file-row {
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.file-row:last-child {
  border-bottom: none;
}

.file-row:hover {
  background: var(--bg-glass-hover);
}

.file-row td {
  padding: 0.65rem 1rem;
  font-size: 0.875rem;
}

.file-name-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.file-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-icon.folder {
  color: var(--folder-color);
}

.file-icon.file {
  color: var(--file-color);
}

.file-icon.video { color: #f472b6; }
.file-icon.audio { color: #34d399; }
.file-icon.image { color: #60a5fa; }
.file-icon.archive { color: #fbbf24; }
.file-icon.document { color: #fb923c; }
.file-icon.code { color: #a78bfa; }

.file-name {
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-row:hover .file-name {
  color: var(--text-accent);
}

.file-size, .file-date {
  color: var(--text-secondary);
  font-size: 0.8rem;
  white-space: nowrap;
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.file-row:hover .file-actions {
  opacity: 1;
}

.file-action-btn {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-action-btn:hover {
  background: var(--bg-input);
  color: var(--accent);
}

.file-action-btn svg {
  width: 15px;
  height: 15px;
}

/* ── Login Page ── */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  animation: fadeInUp 0.5s ease;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header svg {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.login-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  height: 44px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-normal);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-btn {
  width: 100%;
  height: 46px;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.login-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  display: none;
}

.login-error.show {
  display: block;
  animation: shake 0.4s ease;
}

/* ── Media Preview Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 900px;
  width: 95%;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal-body {
  padding: 1.5rem;
}

.modal-body video,
.modal-body audio,
.modal-body img {
  width: 100%;
  border-radius: var(--radius-md);
}

.modal-body img {
  max-height: 70vh;
  object-fit: contain;
}

/* ── Loading ── */
.loading-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  flex-direction: column;
  gap: 1rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ── Empty State ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* ── Toast Notification ── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-slow);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

/* ── Footer ── */
.footer {
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer a {
  color: var(--text-secondary);
}

/* ── Responsive columns ── */
.col-size, .col-date, .col-actions {
  width: 120px;
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 1rem;
  }

  .search-wrapper {
    margin: 0 0.75rem;
  }

  .main-content {
    padding: 1rem;
  }

  .col-date {
    display: none;
  }

  .col-actions {
    width: 80px;
  }

  .file-actions {
    opacity: 1;
  }

  .login-card {
    margin: 1rem;
    padding: 1.75rem;
  }

  .modal-content {
    width: 98%;
    border-radius: var(--radius-lg);
  }
}

@media (max-width: 480px) {
  .col-size {
    display: none;
  }

  .nav-brand span {
    display: none;
  }

  .info-bar {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
}

/* ── Animations ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.file-row {
  animation: slideIn 0.3s ease backwards;
}

.file-row:nth-child(1) { animation-delay: 0.02s; }
.file-row:nth-child(2) { animation-delay: 0.04s; }
.file-row:nth-child(3) { animation-delay: 0.06s; }
.file-row:nth-child(4) { animation-delay: 0.08s; }
.file-row:nth-child(5) { animation-delay: 0.10s; }
.file-row:nth-child(6) { animation-delay: 0.12s; }
.file-row:nth-child(7) { animation-delay: 0.14s; }
.file-row:nth-child(8) { animation-delay: 0.16s; }
.file-row:nth-child(9) { animation-delay: 0.18s; }
.file-row:nth-child(10) { animation-delay: 0.20s; }

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* ── Selection ── */
::selection {
  background: var(--accent);
  color: white;
}

/* ── User badge ── */
.user-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.user-badge .avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: white;
}