/* =========================================================
   NEXDROP — Premium File Sharing CSS
   ========================================================= */

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

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --bg-base:         #07080f;
  --bg-surface:      #0d0f1a;
  --bg-glass:        rgba(255,255,255,0.04);
  --bg-glass-hover:  rgba(255,255,255,0.07);
  --bg-glass-active: rgba(255,255,255,0.10);

  --accent-1:  #6c5ce7;
  --accent-2:  #a29bfe;
  --accent-3:  #fd79a8;
  --accent-4:  #00cec9;
  --accent-grad: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #fd79a8 100%);
  --accent-glow: rgba(108, 92, 231, 0.45);

  --text-primary:   #f0f0ff;
  --text-secondary: #8b8fa8;
  --text-muted:     #4d5068;

  --border-subtle:  rgba(255,255,255,0.06);
  --border-glow:    rgba(108, 92, 231, 0.4);

  --success: #00b894;
  --warning: #fdcb6e;
  --danger:  #e17055;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  24px;
  --radius-full: 999px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.4);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px var(--accent-glow);

  --trans-fast:   150ms cubic-bezier(0.4,0,0.2,1);
  --trans-normal: 250ms cubic-bezier(0.4,0,0.2,1);
  --trans-slow:   400ms cubic-bezier(0.4,0,0.2,1);
  --trans-spring: 350ms cubic-bezier(0.34,1.56,0.64,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ── Background 3D Canvas ───────────────────────────────── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* ── Animated Background ─────────────────────────────────── */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.bg-orbs::before,
.bg-orbs::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.18;
  animation: orb-drift 12s ease-in-out infinite alternate;
}
.bg-orbs::before {
  width: 600px; height: 600px;
  background: var(--accent-1);
  top: -200px; left: -150px;
}
.bg-orbs::after {
  width: 500px; height: 500px;
  background: var(--accent-3);
  bottom: -150px; right: -100px;
  animation-delay: -6s;
}
.bg-orb-mid {
  position: absolute;
  width: 400px; height: 400px;
  background: var(--accent-4);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.1;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation: orb-drift 15s ease-in-out infinite alternate-reverse;
}

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -40px) scale(1.08); }
}

/* ── Grid/Mesh overlay ──────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ── Screens ─────────────────────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--trans-slow), transform var(--trans-slow);
}
.screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(1.04);
}

/* ── Login Screen ────────────────────────────────────────── */
#login-screen {
  background: radial-gradient(ellipse at 30% 20%, rgba(108,92,231,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(253,121,168,0.12) 0%, transparent 60%),
              var(--bg-base);
}

.login-card {
  background: rgba(13,15,26,0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px 44px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,0.04);
  animation: card-rise 0.6s var(--trans-spring) both;
}

@keyframes card-rise {
  from { opacity: 0; transform: translateY(32px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}
.logo-icon {
  width: 44px; height: 44px;
  background: var(--accent-grad);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-glow);
  font-size: 20px;
}
.logo-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.logo-tagline {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 2px;
}

.login-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}
.login-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.form-input-wrap {
  position: relative;
}
.form-input-wrap .input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
  pointer-events: none;
  transition: color var(--trans-fast);
}
.form-input {
  width: 100%;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 13px 14px 13px 42px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast), background var(--trans-fast);
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.2);
  background: var(--bg-glass-hover);
}
.form-input:focus + .input-icon,
.form-input-wrap:focus-within .input-icon {
  color: var(--accent-2);
}

.toggle-password {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  transition: color var(--trans-fast);
  border-radius: var(--radius-sm);
}
.toggle-password:hover { color: var(--text-secondary); }

.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--accent-grad);
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  letter-spacing: 0.2px;
  position: relative;
  overflow: hidden;
  transition: opacity var(--trans-fast), transform var(--trans-fast), box-shadow var(--trans-fast);
  box-shadow: 0 4px 20px rgba(108,92,231,0.4);
  margin-top: 8px;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--trans-fast);
}
.btn-primary:hover::before { background: rgba(255,255,255,0.08); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.login-error {
  display: none;
  background: rgba(225,112,85,0.12);
  border: 1px solid rgba(225,112,85,0.25);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 13px;
  color: #ff9a8b;
  margin-top: 14px;
  animation: shake 0.4s cubic-bezier(0.36,0.07,0.19,0.97);
}
.login-error.visible { display: flex; align-items: center; gap: 8px; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-6px); }
  40%       { transform: translateX(6px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.login-hint {
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(162,155,254,0.06);
  border: 1px solid rgba(162,155,254,0.12);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}
.login-hint strong { color: var(--accent-2); }

/* ── App Layout ──────────────────────────────────────────── */
#app-screen {
  z-index: 5;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  overflow: hidden;
}

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: rgba(13,15,26,0.80);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  z-index: 20;
  flex-shrink: 0;
  gap: 16px;
}
.navbar-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.navbar-logo .logo-icon { width: 32px; height: 32px; font-size: 14px; }
.navbar-logo .logo-name { font-size: 16px; }

.navbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  flex: 1;
  overflow: hidden;
}
.breadcrumb-sep { color: var(--text-muted); font-size: 16px; }
.breadcrumb-item {
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--trans-fast), background var(--trans-fast);
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.breadcrumb-item:hover { color: var(--text-primary); background: var(--bg-glass-hover); }
.breadcrumb-item.active { color: var(--text-primary); font-weight: 500; }

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 7px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: text;
  transition: border-color var(--trans-fast), background var(--trans-fast);
  min-width: 200px;
}
.search-bar:focus-within {
  border-color: var(--accent-1);
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}
.search-bar input {
  background: none;
  border: none;
  outline: none;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: inherit;
  width: 140px;
}
.search-bar input::placeholder { color: var(--text-muted); }

.icon-btn {
  width: 36px; height: 36px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 16px;
  transition: all var(--trans-fast);
}
.icon-btn:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.1);
}
.icon-btn.active {
  background: rgba(108,92,231,0.15);
  border-color: var(--accent-1);
  color: var(--accent-2);
}
.icon-btn.hidden-logs {
  display: none !important;
}

.user-pill {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 5px 12px 5px 6px;
  cursor: pointer;
  transition: all var(--trans-fast);
}
.user-pill:hover { background: var(--bg-glass-hover); border-color: rgba(255,255,255,0.1); }
.user-avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
}
.user-name { font-size: 13px; font-weight: 500; }

/* ── Main Layout ─────────────────────────────────────────── */
.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - 60px);
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: rgba(13,15,26,0.6);
  border-right: 1px solid var(--border-subtle);
  padding: 16px 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: width var(--trans-normal), padding var(--trans-normal);
}

.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 8px 8px 4px;
  margin-top: 8px;
}
.sidebar-section-label:first-child { margin-top: 0; }

.sidebar-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13.5px;
  color: var(--text-secondary);
  transition: all var(--trans-fast);
  border: 1px solid transparent;
}
.sidebar-item:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}
.sidebar-item.active {
  background: rgba(108,92,231,0.12);
  border-color: rgba(108,92,231,0.25);
  color: var(--accent-2);
  font-weight: 500;
}
.sidebar-item .item-icon {
  font-size: 16px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}
.sidebar-item .item-badge {
  margin-left: auto;
  background: var(--accent-1);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

/* ── Folder Tree View ────────────────────────────────────── */
.sidebar-tree {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.sidebar-tree::-webkit-scrollbar { width: 3px; }
.sidebar-tree::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

.tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: var(--radius-md);
  font-size: 12.5px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-item:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}
.tree-item.active {
  background: rgba(108,92,231,0.15);
  color: var(--accent-2);
  font-weight: 500;
}
.tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  font-size: 9px;
  color: var(--text-muted);
  transition: transform var(--trans-fast), color var(--trans-fast);
  cursor: pointer;
}
.tree-toggle:hover { color: var(--text-primary); }
.tree-toggle.expanded { transform: rotate(90deg); }
.tree-toggle.empty { opacity: 0; pointer-events: none; }

.tree-icon {
  font-size: 14px;
  flex-shrink: 0;
}
.tree-label {
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.tree-children {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-left: 12px;
  border-left: 1px dashed rgba(255,255,255,0.08);
  padding-left: 4px;
}
.tree-children.hidden {
  display: none;
}

.sidebar-storage {
  margin-top: auto;
  padding: 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-top: 16px;
}
.storage-label {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
}
.storage-bar {
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.storage-fill {
  height: 100%;
  background: var(--accent-grad);
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.4,0,0.2,1);
  width: 0%;
}

/* ── Main Content ────────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* ── Toolbar ─────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(7,8,15,0.4);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.btn-action {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  background: var(--bg-glass);
  color: var(--text-secondary);
  transition: all var(--trans-fast);
  white-space: nowrap;
}
.btn-action:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.1);
}
.btn-action.primary {
  background: rgba(108,92,231,0.15);
  border-color: rgba(108,92,231,0.35);
  color: var(--accent-2);
}
.btn-action.primary:hover {
  background: rgba(108,92,231,0.25);
  border-color: var(--accent-1);
  color: #fff;
  box-shadow: 0 0 20px rgba(108,92,231,0.2);
}
.btn-action.danger {
  color: var(--danger);
  border-color: rgba(225,112,85,0.3);
}
.btn-action.danger:hover {
  background: rgba(225,112,85,0.12);
  border-color: var(--danger);
}

.sort-select {
  margin-left: auto;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  outline: none;
  transition: all var(--trans-fast);
}
.sort-select:hover { border-color: rgba(255,255,255,0.1); color: var(--text-primary); }

.view-toggle { display: flex; gap: 2px; }

/* ── Drop Zone ───────────────────────────────────────────── */
.drop-zone-banner {
  position: absolute;
  inset: 0;
  background: rgba(108,92,231,0.08);
  border: 3px dashed var(--accent-1);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-fast);
  margin: 12px;
  backdrop-filter: blur(4px);
}
.drop-zone-banner.active {
  opacity: 1;
  pointer-events: all;
}
.drop-zone-banner .dz-icon {
  font-size: 56px;
  animation: bounce 0.8s ease-in-out infinite alternate;
}
.drop-zone-banner .dz-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-2);
}
.drop-zone-banner .dz-sub {
  font-size: 13px;
  color: var(--text-secondary);
}

@keyframes bounce {
  from { transform: translateY(0); }
  to   { transform: translateY(-8px); }
}

/* ── File Grid / List ────────────────────────────────────── */
.files-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
  position: relative;
}
.files-container::-webkit-scrollbar { width: 4px; }
.files-container::-webkit-scrollbar-track { background: transparent; }
.files-container::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

/* Grid view */
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

/* List view */
.files-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ── File / Folder Card ──────────────────────────────────── */
.file-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 14px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  position: relative;
  transition: all var(--trans-normal);
  animation: file-appear 0.3s var(--trans-spring) both;
  overflow: hidden;
}
@keyframes file-appear {
  from { opacity: 0; transform: scale(0.9) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.file-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--accent-grad);
  opacity: 0;
  transition: opacity var(--trans-fast);
  z-index: -1;
}
.file-card:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(108,92,231,0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.file-card.selected {
  background: rgba(108,92,231,0.12);
  border-color: var(--accent-1);
  box-shadow: 0 0 0 2px rgba(108,92,231,0.25);
}

.file-icon {
  font-size: 44px;
  line-height: 1;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}
.file-name {
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  color: var(--text-primary);
  word-break: break-word;
  max-width: 100%;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
}
.file-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.file-card-actions {
  position: absolute;
  top: 6px; right: 6px;
  display: flex; gap: 3px;
  opacity: 0;
  background: rgba(13,15,26,0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
  z-index: 10;
  transition: opacity var(--trans-fast);
}
.file-card:hover .file-card-actions { opacity: 1; }

.card-action-btn {
  width: 24px; height: 24px;
  background: transparent;
  border: none;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 11px;
  color: var(--text-secondary);
  transition: all var(--trans-fast);
}
.card-action-btn:hover { background: var(--bg-glass-hover); color: var(--text-primary); }
.card-action-btn.download:hover { color: var(--success); }
.card-action-btn.delete:hover { color: var(--danger); }

/* List row */
.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--trans-fast);
  animation: file-appear 0.3s var(--trans-spring) both;
}
.file-row:hover { background: var(--bg-glass-hover); border-color: var(--border-subtle); }
.file-row.selected { background: rgba(108,92,231,0.1); border-color: rgba(108,92,231,0.3); }
.file-row .file-icon { font-size: 24px; flex-shrink: 0; }
.file-row .file-info { flex: 1; overflow: hidden; }
.file-row .file-info .file-name { text-align: left; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-row .file-info .file-meta { margin-top: 2px; }
.file-row .file-size { font-size: 12px; color: var(--text-muted); min-width: 70px; text-align: right; }
.file-row .file-date { font-size: 12px; color: var(--text-muted); min-width: 130px; text-align: right; }
.file-row .row-actions {
  display: flex; gap: 4px;
  opacity: 0;
  transition: opacity var(--trans-fast);
  flex-shrink: 0;
}
.file-row:hover .row-actions { opacity: 1; }

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  height: 100%;
  color: var(--text-muted);
  padding: 60px 40px;
  text-align: center;
  min-height: 400px;
  animation: fade-in-up 0.6s var(--trans-spring) both;
}
.empty-state .empty-icon { 
  font-size: 80px; 
  opacity: 0.8;
  filter: drop-shadow(0 0 30px var(--accent-glow));
  animation: float 4s ease-in-out infinite;
}
.empty-state .empty-title { font-size: 20px; font-weight: 700; color: var(--text-primary); margin-top: 8px; }
.empty-state .empty-sub { font-size: 14px; max-width: 320px; line-height: 1.6; }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0); }
  50% { transform: translateY(-15px) rotate(5deg); }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Status Bar ──────────────────────────────────────────── */
.status-bar {
  height: 32px;
  border-top: 1px solid var(--border-subtle);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(7,8,15,0.6);
  flex-shrink: 0;
}
.status-bar span + span::before {
  content: '•';
  margin-right: 16px;
}

/* ── Modal ───────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-fast);
}
.modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: rgba(13,15,26,0.95);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  min-width: 360px;
  max-width: 460px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform var(--trans-spring), opacity var(--trans-fast);
  opacity: 0;
}
.modal-overlay.visible .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}
.modal-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.modal-input {
  width: 100%;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast);
}
.modal-input::placeholder { color: var(--text-muted); }
.modal-input:focus { border-color: var(--accent-1); box-shadow: 0 0 0 3px rgba(108,92,231,0.2); }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}
.btn-cancel {
  padding: 9px 18px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
}
.btn-cancel:hover { background: var(--bg-glass-hover); color: var(--text-primary); }
.btn-confirm {
  padding: 9px 18px;
  background: var(--accent-grad);
  border: none;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  transition: opacity var(--trans-fast);
  box-shadow: 0 4px 16px rgba(108,92,231,0.3);
}
.btn-confirm:hover { opacity: 0.9; }
.btn-confirm.danger {
  background: linear-gradient(135deg, #e17055, #d63031);
  box-shadow: 0 4px 16px rgba(225,112,85,0.3);
}

/* ── Logs Modal ──────────────────────────────────────────── */
.logs-modal {
  width: 90%;
  max-width: 700px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.logs-modal .modal-title {
  margin-bottom: 16px;
}
.logs-container {
  flex: 1;
  overflow-y: auto;
  word-break: break-word;
  white-space: pre-wrap;
}
.logs-container::-webkit-scrollbar {
  width: 8px;
}
.logs-container::-webkit-scrollbar-track {
  background: rgba(108, 92, 231, 0.1);
  border-radius: 4px;
}
.logs-container::-webkit-scrollbar-thumb {
  background: rgba(108, 92, 231, 0.5);
  border-radius: 4px;
}
.logs-container::-webkit-scrollbar-thumb:hover {
  background: rgba(108, 92, 231, 0.7);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
  transition: color var(--trans-fast);
}
.close-btn:hover {
  color: var(--text-primary);
}

/* ── Toast Notifications ─────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(13,15,26,0.95);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: 13px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  min-width: 240px;
  max-width: 360px;
  animation: toast-in 0.3s var(--trans-spring) both;
  position: relative;
  overflow: hidden;
}
.toast::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  width: 100%;
  background: var(--accent-grad);
  animation: toast-progress 3s linear forwards;
}
.toast.success .toast-icon { color: var(--success); }
.toast.error   .toast-icon { color: var(--danger); }
.toast.info    .toast-icon { color: var(--accent-2); }
.toast.warning .toast-icon { color: var(--warning); }
.toast.success::after { background: var(--success); }
.toast.error::after   { background: var(--danger); }
.toast.warning::after { background: var(--warning); }

.toast-icon { font-size: 18px; flex-shrink: 0; }
.toast-content { flex: 1; }
.toast-title { font-weight: 600; }
.toast-msg { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.toast-close {
  background: none; border: none;
  cursor: pointer; color: var(--text-muted);
  font-size: 16px; padding: 2px;
  transition: color var(--trans-fast); flex-shrink: 0;
}
.toast-close:hover { color: var(--text-primary); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(30px) scale(0.95); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toast-progress {
  from { width: 100%; }
  to   { width: 0%; }
}
.toast-out {
  animation: toast-out 0.25s ease forwards;
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(30px); height: 0; padding: 0; margin: 0; border: none; }
}

/* ── Progress Upload Bar ─────────────────────────────────── */
.upload-bar {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: rgba(13,15,26,0.95);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  min-width: 340px;
  max-width: 480px;
  z-index: 900;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(20px);
  transition: opacity var(--trans-fast), transform var(--trans-normal);
}
.upload-bar.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.upload-bar-title { font-size: 12px; color: var(--text-secondary); margin-bottom: 10px; display: flex; justify-content: space-between; }
.upload-progress-track {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.upload-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-grad);
  border-radius: var(--radius-full);
  transition: width var(--trans-fast);
}

/* ── Context Menu ────────────────────────────────────────── */
.ctx-menu {
  position: fixed;
  background: rgba(13,15,26,0.97);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 6px;
  min-width: 180px;
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.92);
  transform-origin: top left;
  transition: opacity var(--trans-fast), transform var(--trans-fast);
  animation: none;
}
.ctx-menu.visible {
  opacity: 1;
  pointer-events: all;
  transform: scale(1);
}
.ctx-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all var(--trans-fast);
}
.ctx-item:hover { background: var(--bg-glass-active); color: var(--text-primary); }
.ctx-item.danger:hover { background: rgba(225,112,85,0.1); color: var(--danger); }
.ctx-item .ctx-icon { width: 18px; text-align: center; font-size: 14px; }
.ctx-sep { height: 1px; background: var(--border-subtle); margin: 4px 0; }

/* ── Hamburger Menu Button ─────────────────────────────── */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px;
  cursor: pointer;
  transition: all var(--trans-fast);
  touch-action: manipulation;
  flex-shrink: 0;
}
.mobile-menu-btn:hover, .mobile-menu-btn:active {
  background: var(--bg-glass-hover);
  border-color: rgba(255,255,255,0.15);
}
.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--trans-fast), opacity var(--trans-fast);
}

/* ── Mobile Drawer ────────────────────────────────────────── */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1500;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-normal);
}
.mobile-drawer-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 300px;
  max-width: 86vw;
  background: rgba(13, 15, 26, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--border-subtle);
  z-index: 1600;
  transform: translateX(-100%);
  transition: transform var(--trans-spring);
  display: flex;
  flex-direction: column;
  padding: calc(16px + env(safe-area-inset-top, 0px)) 16px calc(20px + env(safe-area-inset-bottom, 0px));
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}
.mobile-drawer.active {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 16px;
}
.drawer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.drawer-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-grad);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}
.drawer-logo .logo-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.drawer-close-btn {
  width: 34px;
  height: 34px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--trans-fast);
}
.drawer-close-btn:active {
  background: rgba(225,112,85,0.15);
  color: var(--danger);
}

.mobile-drawer-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
.drawer-user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
}
.drawer-user-sub {
  font-size: 11px;
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 4px;
}
.drawer-user-sub::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.mobile-drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.drawer-actions {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.drawer-action-btn {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  background: var(--bg-glass);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all var(--trans-fast);
  touch-action: manipulation;
}
.drawer-action-btn:active {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}
.drawer-action-btn.danger {
  color: var(--danger);
  border-color: rgba(225, 112, 85, 0.3);
}
.drawer-action-btn.danger:active {
  background: rgba(225, 112, 85, 0.15);
}

/* Mobile elements hidden by default on Desktop (> 768px) */
.mobile-menu-btn,
.mobile-bottom-bar,
.mobile-drawer,
.mobile-drawer-overlay {
  display: none !important;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .mobile-menu-btn { display: flex !important; }
  .mobile-bottom-bar { display: flex !important; }
  .mobile-drawer { display: block !important; }
  .sidebar { display: none; }
  
  .navbar {
    padding: 0 12px;
    gap: 8px;
    height: 56px;
  }
  .navbar-logo .logo-name {
    font-size: 15px;
  }
  .navbar-breadcrumb {
    display: flex;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding: 4px 0;
    mask-image: linear-gradient(90deg, #000 85%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, #000 85%, transparent 100%);
  }
  .navbar-breadcrumb::-webkit-scrollbar { display: none; }
  .breadcrumb-item {
    font-size: 12.5px;
    padding: 3px 6px;
    max-width: 110px;
  }

  .navbar-actions { gap: 6px; }
  .search-bar {
    padding: 5px 10px;
    min-width: unset;
  }
  .search-bar input {
    width: 90px;
    font-size: 12px;
  }
  .search-bar input:focus {
    width: 130px;
  }
  .user-name { display: none; }
  .user-pill { padding: 4px; }

  .app-body {
    height: calc(100vh - 56px);
  }

  .toolbar {
    padding: 10px 12px;
    gap: 8px;
  }
  .toolbar .btn-action {
    padding: 8px 12px;
    font-size: 12.5px;
    min-height: 40px;
    touch-action: manipulation;
  }
  .sort-select {
    padding: 7px 10px;
    font-size: 12px;
  }

  .files-container {
    padding: 12px 12px calc(80px + env(safe-area-inset-bottom, 0px));
  }

  .files-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
  }

  .file-card {
    padding: 14px 10px 12px;
  }
  .file-card-actions {
    opacity: 1; /* Always visible on touch screen */
  }
  .card-action-btn {
    width: 32px;
    height: 32px;
    font-size: 14px;
    border-radius: var(--radius-md);
  }
  .file-icon {
    font-size: 38px;
  }
  .file-name {
    font-size: 11.5px;
  }

  .file-row {
    padding: 12px 10px;
  }
  .file-row .row-actions {
    opacity: 1; /* Always visible on touch screen */
  }
  .file-row .file-date { display: none; }

  /* Mobile Bottom Quick Actions Bar */
  .mobile-bottom-bar {
    display: flex;
    position: fixed;
    bottom: max(16px, env(safe-area-inset-bottom, 16px));
    left: 50%;
    transform: translateX(-50%);
    z-index: 900;
    background: rgba(13, 15, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    padding: 6px;
    gap: 6px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.05);
  }
  .mobile-fab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-subtle);
    background: var(--bg-glass);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: transform var(--trans-fast), background var(--trans-fast);
    touch-action: manipulation;
  }
  .mobile-fab-btn.primary {
    background: var(--accent-grad);
    border: none;
    color: #fff;
    box-shadow: 0 4px 16px rgba(108,92,231,0.4);
  }
  .mobile-fab-btn:active {
    transform: scale(0.95);
  }
  .fab-icon { font-size: 15px; }

  .status-bar {
    padding: 0 12px;
    font-size: 11px;
    margin-bottom: calc(60px + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 480px) {
  .navbar-logo .logo-name { display: none; }
  .files-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .login-card { padding: 32px 20px; width: 92%; margin: 12px; }
  .toolbar .btn-action span { display: none; }
  .toolbar .btn-action { padding: 8px 10px; min-width: 40px; justify-content: center; }
  
  .modal {
    min-width: unset;
    width: 94%;
    padding: 24px 18px;
    margin: 12px;
  }
  .modal-actions {
    gap: 8px;
  }
  .modal-actions button {
    flex: 1;
    text-align: center;
  }

  .preview-panel {
    margin: 8px;
    border-radius: var(--radius-lg);
  }
  .preview-header {
    padding: 12px 14px;
  }
  .preview-file-name {
    max-width: 140px;
    font-size: 13.5px;
  }
  .preview-btn span + text, .preview-btn {
    font-size: 12px;
    padding: 6px 10px;
  }
}

/* ── Scrollbar global ────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ══════════════════════════════════════════════════════════════
   FILE PREVIEW OVERLAY
   ══════════════════════════════════════════════════════════════ */
.preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: stretch;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-normal);
}
.preview-overlay.visible {
  opacity: 1;
  pointer-events: all;
}
.preview-panel {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1100px;
  margin: 20px;
  background: rgba(13,15,26,0.97);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: scale(0.96) translateY(16px);
  transition: transform var(--trans-spring);
}
.preview-overlay.visible .preview-panel {
  transform: scale(1) translateY(0);
}
.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.02);
  flex-shrink: 0;
  gap: 12px;
}
.preview-header-left { display: flex; align-items: center; gap: 12px; overflow: hidden; }
.preview-file-icon { font-size: 28px; flex-shrink: 0; }
.preview-file-name {
  font-size: 15px; font-weight: 600; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 500px;
}

/* HTML Preview Tabs & Controls */
.preview-tab-btn {
  padding: 6px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 12.5px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--trans-fast);
  touch-action: manipulation;
}
.preview-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-glass-hover);
}
.preview-tab-btn.active {
  background: rgba(108, 92, 231, 0.2);
  border-color: var(--accent-1);
  color: var(--accent-2);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(108, 92, 231, 0.25);
}
.preview-file-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.preview-header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.preview-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  background: rgba(108,92,231,0.15);
  border: 1px solid rgba(108,92,231,0.35);
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 500;
  color: var(--accent-2); cursor: pointer; transition: all var(--trans-fast);
}
.preview-btn:hover { background: rgba(108,92,231,0.25); color: #fff; }
.preview-close-btn {
  width: 36px; height: 36px;
  background: var(--bg-glass); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); cursor: pointer; font-size: 16px;
  color: var(--text-secondary); display: flex; align-items: center; justify-content: center;
  transition: all var(--trans-fast);
}
.preview-close-btn:hover { background: rgba(225,112,85,0.15); border-color: var(--danger); color: var(--danger); }
.preview-body {
  flex: 1; overflow: auto; display: flex; align-items: center; justify-content: center;
  padding: 0; min-height: 0; background: rgba(0,0,0,0.2);
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.preview-body img.preview-image {
  max-width: 100%; max-height: 100%; object-fit: contain;
  border-radius: var(--radius-md); display: block; margin: auto; padding: 20px;
}
.preview-body iframe.preview-frame,
.preview-body embed.preview-frame { width: 100%; height: 100%; border: none; display: block; }
.preview-body video.preview-video {
  max-width: 100%; max-height: 100%; display: block; margin: auto;
  border-radius: var(--radius-md); outline: none;
}
.preview-audio-wrap { display: flex; flex-direction: column; align-items: center; gap: 24px; padding: 40px; }
.preview-audio-icon { font-size: 72px; }
.preview-audio-wrap audio { width: 340px; outline: none; }
.preview-code-wrap { width: 100%; height: 100%; overflow: auto; padding: 24px; }
.preview-code-wrap pre {
  font-family: 'Fira Code', 'Cascadia Code', 'JetBrains Mono', 'Courier New', monospace;
  font-size: 13.5px; line-height: 1.7; color: #e2e8f0;
  white-space: pre-wrap; word-break: break-word; tab-size: 2; margin: 0;
}
.preview-markdown { max-width: 760px; margin: 0 auto; padding: 32px 40px; font-size: 15px; line-height: 1.75; color: var(--text-primary); }
.preview-markdown h1, .preview-markdown h2, .preview-markdown h3 { margin-top: 1.4em; margin-bottom: 0.5em; font-family: 'Space Grotesk', sans-serif; }
.preview-markdown h1 { font-size: 2em; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.3em; }
.preview-markdown h2 { font-size: 1.4em; }
.preview-markdown p { margin: 0.8em 0; color: var(--text-secondary); }
.preview-markdown code { background: rgba(108,92,231,0.12); border: 1px solid rgba(108,92,231,0.2); border-radius: 4px; padding: 2px 6px; font-family: monospace; font-size: 0.88em; color: var(--accent-2); }
.preview-markdown pre { background: rgba(0,0,0,0.3); border-radius: var(--radius-md); padding: 16px; overflow-x: auto; }
.preview-markdown pre code { background: none; border: none; padding: 0; color: #e2e8f0; }
.preview-markdown ul, .preview-markdown ol { padding-left: 1.5em; color: var(--text-secondary); }
.preview-markdown li { margin: 0.3em 0; }
.preview-markdown blockquote { border-left: 3px solid var(--accent-1); margin: 1em 0; padding: 8px 16px; background: rgba(108,92,231,0.06); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); }
.preview-markdown a { color: var(--accent-2); text-decoration: underline; }
.preview-markdown strong { color: var(--text-primary); }
.preview-markdown hr { border: none; border-top: 1px solid var(--border-subtle); margin: 1.5em 0; }
.preview-unsupported { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 60px; color: var(--text-muted); text-align: center; }
.preview-unsupported .prev-icon { font-size: 64px; opacity: 0.5; }
.preview-unsupported .prev-title { font-size: 16px; font-weight: 500; color: var(--text-secondary); }
.preview-unsupported .prev-sub { font-size: 13px; }
@media (max-width: 768px) {
  .preview-panel { margin: 8px; border-radius: var(--radius-lg); }
  .preview-file-name { max-width: 180px; }
  .preview-markdown { padding: 20px; }
}

/* ── DRAG & DROP MOVING STYLES ───────────────────────────────── */
.file-card.drag-target-over,
.file-row.drag-target-over,
.tree-node-content.drag-target-over,
.breadcrumb-item.drag-target-over {
  border: 2px dashed var(--accent-1) !important;
  background: rgba(99, 102, 241, 0.25) !important;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.5) !important;
  transform: scale(1.02);
  transition: all 0.15s ease;
}

.file-card.dragging,
.file-row.dragging {
  opacity: 0.35;
}

/* ── MOVE MODAL TREE PICKER ──────────────────────────────────── */
.move-picker-node {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-primary);
  user-select: none;
  transition: background var(--transition-fast);
  margin-bottom: 2px;
}

.move-picker-node:hover {
  background: rgba(255, 255, 255, 0.08);
}

.move-picker-node.selected {
  background: var(--accent-1);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.move-picker-node.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: transparent !important;
}