/* ====================================================================
   NavDrive — main.css
   Light theme design system — tokens, typography, base styles
   ==================================================================== */

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

/* ─── CSS Custom Properties ──────────────────────────────────────────────────*/
:root {
  /* Colors */
  --primary:          #522258;
  --primary-hover:    #8C3061;
  --primary-light:    #F5F0F6;
  --primary-border:   #E8D5E0;

  --bg-base:          #F8FAFC;
  --bg-surface:       #FFFFFF;
  --bg-elevated:      #FFFFFF;
  --bg-subtle:        #F1F5F9;
  --bg-muted:         #E2E8F0;

  --text-primary:     #0F172A;
  --text-secondary:   #475569;
  --text-muted:       #94A3B8;
  --text-disabled:    #CBD5E1;

  --border:           #E2E8F0;
  --border-focus:     #522258;

  --success:          #10B981;
  --success-light:    #ECFDF5;
  --danger:           #C63C51;
  --danger-light:     #FDF2F2;
  --warning:          #D95F59;
  --warning-light:    #FFF0EE;
  --info:             #8C3061;
  --info-light:       #F8F0F5;

  /* Shadows */
  --shadow-xs:  0 1px 2px 0 rgb(0 0 0 / 0.02);
  --shadow-sm:  0 1px 3px 0 rgb(0 0 0 / 0.04), 0 1px 2px -1px rgb(0 0 0 / 0.02);
  --shadow-md:  0 4px 6px -1px rgb(0 0 0 / 0.04), 0 2px 4px -2px rgb(0 0 0 / 0.02);
  --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / 0.06), 0 4px 6px -4px rgb(0 0 0 / 0.03);
  --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / 0.06), 0 8px 10px -6px rgb(0 0 0 / 0.03);

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --radius-xl:  18px;
  --radius-full: 9999px;

  /* Spacing */
  --sidebar-w:  240px;
  --topbar-h:   60px;

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

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, select, textarea { font-family: inherit; }
ul, ol { list-style: none; }

/* ─── Typography ─────────────────────────────────────────────────────────────*/
.text-xs   { font-size: 0.75rem; }
.text-sm   { font-size: 0.8125rem; }
.text-base { font-size: 0.875rem; }
.text-lg   { font-size: 1rem; }
.text-xl   { font-size: 1.125rem; }
.text-2xl  { font-size: 1.25rem; }
.text-3xl  { font-size: 1.5rem; }

.font-medium  { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold    { font-weight: 700; }

.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted     { color: var(--text-muted); }
.text-danger    { color: var(--danger); }
.text-success   { color: var(--success); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ─── Buttons ────────────────────────────────────────────────────────────────*/
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--transition);
  white-space: nowrap;
  user-select: none;
  border: 1.5px solid transparent;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-xs);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-focus);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger);
  border-color: var(--danger);
  filter: brightness(1.15);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  padding: 7px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-icon:hover { background: var(--bg-subtle); color: var(--text-primary); }
.btn-icon svg { width: 16px; height: 16px; }

.w-full { width: 100%; justify-content: center; }

/* ─── Form Elements ──────────────────────────────────────────────────────────*/
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface);
  transition: all var(--transition);
  outline: none;
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 25%, transparent);
}

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

.form-input-icon {
  position: relative;
}
.form-input-icon .form-input { padding-left: 38px; }
.form-input-icon .input-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
}
.form-input-icon .input-icon svg { width: 15px; height: 15px; }

/* ─── Modal ──────────────────────────────────────────────────────────────────*/
.overlay {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 0.45);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  transform: translateY(8px) scale(0.98);
  transition: transform var(--transition-slow);
}
.overlay.active .modal { transform: translateY(0) scale(1); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-title svg { width: 18px; height: 18px; color: var(--primary); }

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* ─── Toast ──────────────────────────────────────────────────────────────────*/
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--bg-surface);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  pointer-events: all;
  cursor: pointer;
  animation: toastIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  max-width: 340px;
}

.toast svg { width: 16px; height: 16px; flex-shrink: 0; }

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

.toast.hide { animation: toastOut 0.2s ease forwards; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px) scale(0.95); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(20px); }
}

/* ─── Spinner ────────────────────────────────────────────────────────────────*/
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}
.spinner-lg { width: 36px; height: 36px; border-width: 3px; }

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

/* ─── Dark Theme ─────────────────────────────────────────────────────────────*/
[data-theme="dark"] {
  --primary:          #B08CB0;
  --primary-hover:    #C4A0C4;
  --primary-light:    #2D1E35;
  --primary-border:   #3D2A45;

  --bg-base:          #0C0E12;
  --bg-surface:       #13161B;
  --bg-elevated:      #1A1D24;
  --bg-subtle:        #22262E;
  --bg-muted:         #2A2F38;

  --text-primary:     #E4E9F0;
  --text-secondary:   #B0B8C8;
  --text-muted:       #798196;
  --text-disabled:    #4B5163;

  --border:           #282C36;
  --border-focus:     #B08CB0;

  --success:          #34D399;
  --success-light:    #0A261E;
  --danger:           #FB7185;
  --danger-light:     #2A141C;
  --warning:          #FBBF24;
  --warning-light:    #261F0E;
  --info:             #B08CB0;
  --info-light:       #2D1E35;

  --shadow-xs:  0 1px 2px 0 rgb(0 0 0 / 0.35);
  --shadow-sm:  0 1px 3px 0 rgb(0 0 0 / 0.45);
  --shadow-md:  0 4px 6px -1px rgb(0 0 0 / 0.45);
  --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / 0.45);
  --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / 0.5);
}

/* Smooth theme transition */
.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease !important;
}

/* Reduced motion override */
html[style*="--transition: 0ms"] *,
html[style*="--transition: 0ms"] *::before,
html[style*="--transition: 0ms"] *::after {
  transition: none !important;
}

/* ─── Team Avatar Helper ──────────────────────────────────────────────────────*/
.team-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8125rem;
  color: #fff;
  flex-shrink: 0;
  background: var(--primary);
  overflow: hidden;
}
.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ─── Misc ───────────────────────────────────────────────────────────────────*/
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* Upload progress */
#upload-progress-container {
  display: none !important;
}

.upload-progress-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  box-shadow: var(--shadow-lg);
  transform-origin: bottom right;
}

@keyframes flyToFab {
  0% { transform: scale(1) translateY(0); opacity: 1; }
  100% { transform: scale(0.1) translate(300px, 100px); opacity: 0; }
}

.upload-progress-item.minimizing {
  animation: flyToFab 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards !important;
  pointer-events: none;
}

#floating-upload-badge {
  position: fixed;
  bottom: 140px;
  right: 24px;
  width: auto;
  min-width: 64px;
  padding: 0 14px;
  height: 44px;
  background: var(--bg-surface);
  border: 2px solid var(--primary);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 1400;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px) scale(0.8);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

#floating-upload-badge.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

#floating-upload-badge svg.spin {
  width: 22px;
  height: 22px;
  color: var(--primary);
  animation: spin 1s linear infinite;
}

@media (min-width: 769px) {
  #floating-upload-badge {
    bottom: 30px;
    right: 140px;
  }
}

/* ─── Upload Modal ────────────────────────────────────────────────────────────*/
.upload-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.upload-modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.upload-modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 520px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
}
.upload-modal-overlay.active .upload-modal {
  transform: translateY(0) scale(1);
}
.upload-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
}
.upload-modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}
.upload-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: all var(--transition);
}
.upload-modal-close:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}
.upload-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}
.upload-modal-empty {
  text-align: center;
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Upload modal items */
.um-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.um-item:last-child { border-bottom: none; }
.um-item-name {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.um-item-track {
  height: 6px;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 6px;
}
.um-item-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  border-radius: var(--radius-full);
  transition: width 0.25s ease;
}
.um-item-done .um-item-fill { background: var(--success); }
.um-item-error .um-item-fill { background: var(--danger); }
.um-item-status {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.um-item-done .um-item-status { color: var(--success); }
.um-item-error .um-item-status { color: var(--danger); }

/* Upload controls (hide/show) */
.upload-controls {
  position: fixed;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1501;
  display: flex;
  justify-content: flex-end;
  width: 340px;
  gap: 8px;
  pointer-events: none;
}
.upload-controls button {
  pointer-events: auto;
}
.upload-hide-btn,
.upload-show-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.upload-hide-btn:hover,
.upload-show-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.upload-hide-btn svg,
.upload-show-btn svg {
  width: 14px;
  height: 14px;
}

.upload-progress-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.upload-progress-header .upload-progress-name {
  flex: 1;
  margin-bottom: 0;
}
.upload-item-hide-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  display: flex;
  opacity: 0.5;
  transition: all 0.2s;
}
.upload-item-hide-btn:hover {
  opacity: 1;
  color: var(--text-primary);
}
.upload-item-hide-btn svg {
  width: 14px;
  height: 14px;
}

.floating-upload-count {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* Upload toast enter animation */
@keyframes slideInUp {
  from { transform: translateY(30px) scale(0.9); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}
.upload-progress-item {
  animation: slideInUp 0.3s cubic-bezier(0.34,1.56,0.64,1) forwards;
}
.upload-progress-name {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.upload-progress-track {
  height: 4px;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 6px;
}
.upload-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  border-radius: var(--radius-full);
  transition: width 0.2s ease;
}
.upload-progress-status {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Drop overlay */
.upload-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  border: 3px dashed var(--primary);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.upload-overlay.active { opacity: 1; pointer-events: all; }
.upload-overlay-inner {
  text-align: center;
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  padding: 48px 64px;
  box-shadow: var(--shadow-xl);
}
.upload-overlay-icon {
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
}
.upload-overlay-icon svg { width: 48px; height: 48px; }
.upload-overlay-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
}

/* Context menu */
.context-menu, .new-menu {
  position: fixed;
  z-index: 1100;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 6px;
  min-width: 200px;
  box-shadow: var(--shadow-xl);
  animation: menuIn 0.12s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes menuIn {
  from { opacity: 0; transform: scale(0.95) translateY(-4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.ctx-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
}
.ctx-item:hover { background: var(--bg-subtle); }
.ctx-item.danger { color: var(--danger); }
.ctx-item.danger:hover { background: var(--danger-light); }
.ctx-item svg { width: 15px; height: 15px; color: var(--text-muted); flex-shrink: 0; }
.ctx-item.danger svg { color: var(--danger); }

.ctx-divider {
  height: 1px;
  background: var(--border);
  margin: 5px 0;
}

/* Move folder list */
.move-folder-list {
  max-height: 260px;
  overflow-y: auto;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px;
}
.move-folder-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.move-folder-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  transition: background var(--transition);
}
.move-folder-item svg { width: 16px; height: 16px; color: var(--text-muted); }
.move-folder-item:hover { background: var(--bg-subtle); }
.move-folder-item.selected {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}
.move-folder-item.selected svg { color: var(--primary); }

/* Share link row */
.share-link-row {
  display: flex;
  gap: 8px;
}
.share-link-input { font-size: 0.8125rem; font-family: ui-monospace, monospace; }

/* Trash warning bar */
.trash-warning-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--warning-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.trash-warning-bar svg { width: 16px; height: 16px; color: var(--warning); flex-shrink: 0; }