/* =====================================================
   Standalone variables & resets (auth pages only)
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-dark:        #080d1a;
  --bg-panel:       #0e1525;
  --bg-card:        #162035;
  --accent:         #4f7df5;
  --accent-hover:   #6b96ff;
  --text-primary:   #dde5f2;
  --text-secondary: #7a8fb0;
  --border:         #1c2d48;
  --radius: 12px;
  --transition: 0.2s ease;
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
}

/* =====================================================
   Auth Pages (Login / Register)
   ===================================================== */
.auth-page {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-dark);
}

.auth-card {
  background-color: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 40px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 4px 28px rgba(0, 0, 0, 0.22);
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
  justify-content: center;
}

.auth-logo .brand-icon {
  font-size: 26px;
  color: var(--accent);
}

.auth-logo .brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.auth-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 10px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus {
  border-color: var(--accent);
}

.remember-row {
  margin-bottom: 8px;
}

.remember-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px !important;
  color: var(--text-secondary) !important;
  font-weight: 400 !important;
  margin-bottom: 0 !important;
}

.remember-label input[type="checkbox"] {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.btn-primary {
  width: 100%;
  padding: 11px;
  background-color: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background-color var(--transition);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.auth-link {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.auth-link a {
  color: var(--accent);
  text-decoration: none;
}

.auth-link a:hover {
  text-decoration: underline;
}

/* Flash messages */
.flash-list {
  list-style: none;
  margin-bottom: 16px;
}

.flash-msg {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 8px;
}

.flash-msg.danger  { background: rgba(220,53,69,0.18);  color: #f87171; border: 1px solid rgba(220,53,69,0.3); }
.flash-msg.success { background: rgba(34,197,94,0.15);  color: #4ade80; border: 1px solid rgba(34,197,94,0.3); }
.flash-msg.warning { background: rgba(251,191,36,0.15); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.flash-msg.info    { background: rgba(79,142,247,0.15); color: var(--accent); border: 1px solid rgba(79,142,247,0.3); }

/* =====================================================
   Settings Page (uses sidebar layout)
   ===================================================== */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
  max-width: 800px;
}

.settings-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.14);
}

.settings-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.settings-card .form-group {
  margin-bottom: 14px;
}

.settings-card .btn-primary {
  width: auto;
  padding: 9px 24px;
  margin-top: 4px;
  font-size: 14px;
}

/* =====================================================
   Light Theme (follows system prefers-color-scheme)
   ===================================================== */
@media (prefers-color-scheme: light) {
  :root {
    --bg-dark:        #f3f7fd;
    --bg-panel:       #ffffff;
    --bg-card:        #e8eef8;
    --accent:         #2563eb;
    --accent-hover:   #1d4ed8;
    --text-primary:   #0a1628;
    --text-secondary: #4a5c7a;
    --border:         #c0cde4;
  }

  .auth-card {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  }

  .settings-card {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  }
}