/* ============================================================
   Google Drive Folder Sharing App — Shared Stylesheet
   Premium Dark Glassmorphism Design
   ============================================================ */

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

/* ─── CSS Variables ──────────────────────────────────────────── */
:root {
  --bg-dark:       #0d0f1a;
  --bg-card:       rgba(255,255,255,0.05);
  --bg-card-hover: rgba(255,255,255,0.09);
  --border:        rgba(255,255,255,0.1);
  --border-accent: rgba(99,179,237,0.4);

  --accent-blue:   #4fa3e0;
  --accent-purple: #7c6fff;
  --accent-green:  #38d39f;
  --accent-red:    #f87171;
  --accent-yellow: #fbbf24;

  --text-primary:  #f0f4ff;
  --text-secondary:#94a3b8;
  --text-muted:    #4a5568;

  --gradient-hero: linear-gradient(135deg, #0d0f1a 0%, #151a2e 50%, #1a1f36 100%);
  --gradient-btn:  linear-gradient(135deg, #4fa3e0, #7c6fff);
  --gradient-green:linear-gradient(135deg, #38d39f, #22c55e);

  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(79,163,224,0.2);

  --radius:  14px;
  --radius-sm: 8px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ─── Animated background particles ─────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 10% 20%, rgba(79,163,224,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 500px 400px at 90% 80%, rgba(124,111,255,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ─── Layout ─────────────────────────────────────────────────── */
.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Navigation ─────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-btn);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.nav-actions { display: flex; gap: 12px; align-items: center; }

/* ─── Hero Section ───────────────────────────────────────────── */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(79,163,224,0.12);
  border: 1px solid rgba(79,163,224,0.25);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #f0f4ff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 36px;
}

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-card), var(--shadow-glow); }

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.card-sub {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 4px 15px rgba(79,163,224,0.35);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,163,224,0.45); }

.btn-success {
  background: var(--gradient-green);
  color: #fff;
  box-shadow: 0 4px 15px rgba(56,211,159,0.3);
}
.btn-success:hover:not(:disabled) { transform: translateY(-1px); }

.btn-danger {
  background: rgba(248,113,113,0.15);
  color: var(--accent-red);
  border: 1px solid rgba(248,113,113,0.3);
}
.btn-danger:hover:not(:disabled) { background: rgba(248,113,113,0.25); }

.btn-ghost {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) { background: var(--bg-card-hover); border-color: var(--border-accent); }

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-full { width: 100%; }

/* Google Sign-In Button */
.btn-google {
  background: #fff;
  color: #1a1a2e;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.btn-google:hover:not(:disabled) { background: #f8fafc; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.4); }
.btn-google img { width: 18px; height: 18px; }

/* ─── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.82rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-input {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}
.form-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(79,163,224,0.15); }
.form-input::placeholder { color: var(--text-muted); }

/* ─── Status Bar ─────────────────────────────────────────────── */
.status-bar {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  transition: var(--transition);
}
.status-bar.success { border-color: rgba(56,211,159,0.4); background: rgba(56,211,159,0.08); color: var(--accent-green); }
.status-bar.error   { border-color: rgba(248,113,113,0.4); background: rgba(248,113,113,0.08); color: var(--accent-red); }
.status-bar.info    { border-color: rgba(79,163,224,0.4);  background: rgba(79,163,224,0.08);  color: var(--accent-blue); }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Progress Bar ───────────────────────────────────────────── */
.progress-wrap {
  background: rgba(255,255,255,0.06);
  border-radius: 100px;
  height: 6px;
  overflow: hidden;
  margin: 12px 0;
}
.progress-bar {
  height: 100%;
  background: var(--gradient-btn);
  border-radius: 100px;
  transition: width 0.4s ease;
  width: 0%;
}

/* ─── Table ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
tbody td { padding: 14px 16px; font-size: 0.875rem; border-bottom: 1px solid rgba(255,255,255,0.04); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: rgba(255,255,255,0.025); }

.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
}
.badge-green { background: rgba(56,211,159,0.12); color: var(--accent-green); border: 1px solid rgba(56,211,159,0.25); }
.badge-yellow { background: rgba(251,191,36,0.12); color: var(--accent-yellow); border: 1px solid rgba(251,191,36,0.25); }
.badge-gray { background: rgba(148,163,184,0.12); color: var(--text-secondary); border: 1px solid rgba(148,163,184,0.2); }
.badge-blue { background: rgba(79,163,224,0.12); color: var(--accent-blue); border: 1px solid rgba(79,163,224,0.25); }

/* ─── Upload Drop Zone ───────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.drop-zone:hover, .drop-zone.dragging {
  border-color: var(--accent-blue);
  background: rgba(79,163,224,0.06);
}
.drop-zone input[type="file"] {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0; cursor: pointer;
}
.drop-zone-icon { font-size: 2.5rem; margin-bottom: 12px; }
.drop-zone h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.drop-zone p { font-size: 0.82rem; color: var(--text-secondary); }

/* ─── File List ──────────────────────────────────────────────── */
.file-list { display: flex; flex-direction: column; gap: 8px; }

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: var(--transition);
}
.file-item:hover { border-color: var(--border-accent); background: rgba(255,255,255,0.05); }

.file-icon { font-size: 1.4rem; flex-shrink: 0; }
.file-info { flex: 1; min-width: 0; }
.file-name { font-size: 0.875rem; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.file-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* ─── Alert Banner ───────────────────────────────────────────── */
.alert {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 16px;
}
.alert-info    { background: rgba(79,163,224,0.1);   border: 1px solid rgba(79,163,224,0.25);   color: var(--accent-blue); }
.alert-success { background: rgba(56,211,159,0.1);  border: 1px solid rgba(56,211,159,0.25);  color: var(--accent-green); }
.alert-error   { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.25); color: var(--accent-red); }
.alert-warning { background: rgba(251,191,36,0.1);  border: 1px solid rgba(251,191,36,0.25);  color: var(--accent-yellow); }

/* ─── Grid ───────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 768px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ─── Stats Card ─────────────────────────────────────────────── */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  backdrop-filter: blur(12px);
}
.stat-label { font-size: 0.78rem; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.stat-value { font-size: 2rem; font-weight: 700; line-height: 1; }
.stat-value.blue   { color: var(--accent-blue); }
.stat-value.green  { color: var(--accent-green); }
.stat-value.purple { color: var(--accent-purple); }

/* ─── Section Headers ────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.section-title { font-size: 1.1rem; font-weight: 700; }
.section-sub   { font-size: 0.82rem; color: var(--text-secondary); margin-top: 2px; }

/* ─── Empty State ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}
.empty-state .empty-icon { font-size: 2.5rem; margin-bottom: 12px; }
.empty-state h3 { font-size: 1rem; color: var(--text-primary); margin-bottom: 6px; }
.empty-state p  { font-size: 0.85rem; }

/* ─── Login Page Center ──────────────────────────────────────── */
.login-center {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-box {
  width: 100%;
  max-width: 420px;
}
.login-logo {
  text-align: center;
  margin-bottom: 32px;
}
.login-logo .logo-icon {
  width: 64px; height: 64px;
  background: var(--gradient-btn);
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 14px;
  box-shadow: 0 8px 24px rgba(79,163,224,0.3);
}
.login-logo h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 6px; }
.login-logo p  { font-size: 0.875rem; color: var(--text-secondary); }

/* ─── Dashboard Grid ─────────────────────────────────────────── */
.page-header {
  padding: 40px 0 28px;
}
.page-header h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 4px; }
.page-header p  { color: var(--text-secondary); font-size: 0.9rem; }

/* ─── Divider ────────────────────────────────────────────────── */
.divider { height: 1px; background: var(--border); margin: 24px 0; }

/* ─── Utility ────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted  { color: var(--text-secondary); }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.hidden { display: none !important; }
.flex   { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.w-full { width: 100%; }

/* ─── Toast Notification ─────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  background: rgba(30,35,60,0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-size: 0.875rem;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  animation: slideIn 0.3s ease;
  min-width: 280px;
}
.toast.success { border-left: 3px solid var(--accent-green); }
.toast.error   { border-left: 3px solid var(--accent-red); }
.toast.info    { border-left: 3px solid var(--accent-blue); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ─── Profile Row ────────────────────────────────────────────── */
.profile-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.profile-name { font-size: 0.9rem; font-weight: 600; }
.profile-email { font-size: 0.78rem; color: var(--text-secondary); }

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color 0.2s;
  margin-bottom: 20px;
}
.back-link:hover { color: var(--text-primary); }

/* Responsive padding */
@media (max-width: 600px) {
  .hero { padding: 48px 0 40px; }
  .card { padding: 20px; }
}