/* ============ RESET ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --surface-hover: #f8fafc;
  --border: #e2e8f0;
  --border-strong: #cbd5e0;
  --border-focus: #3b82f6;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --primary: #1e3a8a;
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --success: #059669;
  --success-bg: #d1fae5;
  --info: #2563eb;
  --info-bg: #dbeafe;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.05);
  --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.07), 0 2px 4px -1px rgba(15,23,42,0.04);
  --shadow-lg: 0 10px 20px -3px rgba(15,23,42,0.08), 0 4px 8px -2px rgba(15,23,42,0.04);
  --shadow-xl: 0 20px 40px -4px rgba(15,23,42,0.10);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ============ LOGIN ============ */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(circle at 20% 30%, rgba(30,58,138,0.05), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(37,99,235,0.05), transparent 40%),
    var(--bg);
}
.auth-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border);
}
.auth-logo {
  display: block;
  height: 56px;
  margin: 0 auto 28px;
  object-fit: contain;
}
.auth-title {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.auth-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 14px;
}
.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-label span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.auth-label input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.auth-label input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.auth-error {
  background: var(--danger-bg);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  border: 1px solid #fecaca;
}
.auth-success {
  background: var(--success-bg);
  color: var(--success);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* ============ BUTTONS ============ */
.btn-primary {
  background: var(--primary);
  color: white;
  border: none;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.btn-secondary:hover { background: var(--surface-alt); }

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.btn-icon:hover { background: var(--surface-alt); border-color: var(--border-strong); }
.btn-icon.refreshing svg { animation: spin 0.8s linear infinite; }