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

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── Navbar ───────────────────────────────────────────── */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 60px;
  box-shadow: var(--shadow);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--primary);
  text-decoration: none;
}

.nav-user {
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
}

.nav-form {
  display: inline;
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  text-align: center;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

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

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
}

.btn-full {
  width: 100%;
}

/* ── Alerts ───────────────────────────────────────────── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.alert-success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ── Hero (Home Page) ─────────────────────────────────── */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero-content .highlight {
  color: var(--primary);
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* ── Auth Pages ───────────────────────────────────────── */
.auth-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-md);
}

.auth-card h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.form-group input {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.auth-footer {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Container ────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Dashboard ────────────────────────────────────────── */
.dashboard {
  flex: 1;
}

.dashboard h1 {
  margin-bottom: 1.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.stat-card h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.section {
  margin-top: 2rem;
}

.section h2 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.action-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.action-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.action-card h3 {
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.action-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.action-card-btn {
  width: 100%;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

/* ── Profile Page ─────────────────────────────────────── */
.profile-page {
  flex: 1;
}

.profile-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.profile-details {
  flex: 1;
}

.detail-row {
  display: flex;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  min-width: 130px;
}

.detail-value {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

/* ── Footer ───────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 640px) {
  .hero-content h1 {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .profile-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .detail-row {
    flex-direction: column;
    gap: 0.15rem;
  }

  .detail-label {
    min-width: auto;
  }

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