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

:root {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --text-primary: #1a2530;
  --text-secondary: #5c6b7a;
  --border-color: #dde3ea;
  --accent-primary: #2f7fd1;
  --accent-primary-dark: #235f9c;
  --success-bg: rgba(34, 179, 106, 0.12);
  --success-text: #1e8f57;
  --danger-bg: rgba(220, 53, 69, 0.1);
  --danger-text: #c9314a;
  --warning-bg: rgba(214, 158, 0, 0.14);
  --warning-text: #a3730a;
  --shadow-card: 0 1px 3px rgba(20, 30, 40, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f1720;
    --bg-secondary: #172531;
    --text-primary: #e8edf2;
    --text-secondary: #9aa9b8;
    --border-color: #2a3a48;
    --accent-primary: #2f7fd1;
    --accent-primary-dark: #235f9c;
    --success-bg: rgba(74, 222, 128, 0.12);
    --success-text: #4ade80;
    --danger-bg: rgba(248, 113, 113, 0.12);
    --danger-text: #f87171;
    --warning-bg: rgba(251, 191, 36, 0.12);
    --warning-text: #fbbf24;
    --shadow-card: none;
  }
}

/* Explicit theme choice (via the toggle button, saved in localStorage) always wins
   over the OS preference above, in both directions. */
:root[data-theme="light"] {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --text-primary: #1a2530;
  --text-secondary: #5c6b7a;
  --border-color: #dde3ea;
  --accent-primary: #2f7fd1;
  --accent-primary-dark: #235f9c;
  --success-bg: rgba(34, 179, 106, 0.12);
  --success-text: #1e8f57;
  --danger-bg: rgba(220, 53, 69, 0.1);
  --danger-text: #c9314a;
  --warning-bg: rgba(214, 158, 0, 0.14);
  --warning-text: #a3730a;
  --shadow-card: 0 1px 3px rgba(20, 30, 40, 0.06);
}
:root[data-theme="dark"] {
  --bg-primary: #0f1720;
  --bg-secondary: #172531;
  --text-primary: #e8edf2;
  --text-secondary: #9aa9b8;
  --border-color: #2a3a48;
  --accent-primary: #2f7fd1;
  --accent-primary-dark: #235f9c;
  --success-bg: rgba(74, 222, 128, 0.12);
  --success-text: #4ade80;
  --danger-bg: rgba(248, 113, 113, 0.12);
  --danger-text: #f87171;
  --warning-bg: rgba(251, 191, 36, 0.12);
  --warning-text: #fbbf24;
  --shadow-card: none;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
}
a { color: var(--accent-primary); text-decoration: none; }

.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}
.sidebar .brand { padding: 0 20px 20px; font-weight: 800; font-size: 1.1rem; border-bottom: 1px solid var(--border-color); margin-bottom: 12px; }
.sidebar nav { flex: 1; }
.sidebar nav a {
  display: block;
  padding: 12px 20px;
  color: var(--text-secondary);
  font-weight: 500;
}
.sidebar nav a:hover, .sidebar nav a.active { background: rgba(47,127,209,0.1); color: var(--text-primary); }
.sidebar-footer { padding: 14px 20px; border-top: 1px solid var(--border-color); color: var(--text-secondary); font-size: 0.85rem; }

.main { flex: 1; padding: 28px 32px; min-width: 0; }
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}
h1, h2, h3 { font-weight: 700; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 10px; padding: 18px; box-shadow: var(--shadow-card); }
.stat-card .value { font-size: 1.8rem; font-weight: 800; }
.stat-card .label { color: var(--text-secondary); font-size: 0.85rem; }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 480px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border-color); }
th { color: var(--text-secondary); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; white-space: nowrap; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.badge-success { background: var(--success-bg); color: var(--success-text); }
.badge-danger { background: var(--danger-bg); color: var(--danger-text); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); }

.btn {
  display: inline-block;
  background: var(--accent-primary);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  min-height: 44px;
}
.btn:hover { background: var(--accent-primary-dark); }
.btn-secondary { background: transparent; border: 1px solid var(--border-color); color: var(--text-primary); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: inherit;
  font-size: 16px;
  min-height: 44px;
}
.form-group textarea { min-height: unset; }

.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.auth-card { width: 100%; max-width: 400px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 12px; padding: 32px; box-shadow: var(--shadow-card); }
.auth-card h1 { text-align: center; margin-bottom: 24px; font-size: 1.4rem; }
.error-banner { background: var(--danger-bg); color: var(--danger-text); padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--text-secondary); }

.loading-indicator { display: none; align-items: center; gap: 10px; margin-top: 10px; }
.loading-indicator.active { display: flex; }
.loading-indicator .progress-track {
  flex: 1;
  max-width: 240px;
  height: 6px;
  border-radius: 999px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}
.loading-indicator .progress-fill {
  height: 100%;
  width: 40%;
  border-radius: 999px;
  background: var(--accent-primary);
  animation: progress-slide 1.1s ease-in-out infinite;
}
.loading-indicator .progress-label { color: var(--text-secondary); font-size: 0.9rem; }
@keyframes progress-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}

/* Mobile topbar (hidden on desktop) */
.mobile-topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}
.mobile-topbar .brand { font-weight: 800; font-size: 1.05rem; }
.mobile-topbar .hamburger {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.mobile-topbar .hamburger span, .mobile-topbar .hamburger::before, .mobile-topbar .hamburger::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
}
.mobile-topbar .hamburger::before { transform: translateY(-6px); position: absolute; }
.mobile-topbar .hamburger::after { transform: translateY(6px); position: absolute; }

.sidebar-backdrop { display: none; }

@media (max-width: 768px) {
  .mobile-topbar { display: flex; }

  .layout { flex-direction: column; }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    width: 260px;
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
  }
  .sidebar-backdrop.open { display: block; }

  .main { padding: 18px; }
  .auth-card { padding: 24px; }

  .stat-grid { grid-template-columns: 1fr; }

  form[style*="display:flex"] { flex-direction: column; }
  form[style*="display: flex"] { flex-direction: column; }
}