@import url('./theme-variables.css');

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html { scroll-behavior: smooth; height: 100%; }

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-accent-hover); }
button, input, textarea, select { font: inherit; }

/* ========== Layout ========== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-2xl);
  width: 100%;
}

.main { flex: 1; }

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-height);
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  letter-spacing: -0.5px;
}
.navbar-nav {
  display: flex;
  gap: var(--spacing-3xl);
  align-items: center;
}
.navbar-nav a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}
.navbar-nav a:hover { color: var(--color-text-primary); }
.navbar-nav a.active { color: var(--color-text-primary); }

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}
.btn:hover { border-color: var(--color-border-hover); background: var(--color-surface); }
.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn-outline { background: transparent; border-color: var(--color-border); color: var(--color-text-primary); }
.btn-outline:hover { background: var(--color-surface); }
.btn-lg { padding: 12px 28px; font-size: var(--font-size-base); }
.btn-block { width: 100%; }

/* ========== Forms ========== */
.form-group { margin-bottom: var(--spacing-xl); }
.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}
.form-input, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-primary);
  transition: border-color var(--transition-base);
}
.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}
.form-textarea { resize: vertical; min-height: 100px; }

/* ========== Cards ========== */
.card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
}
.card-hover:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

/* ========== Hero ========== */
.hero {
  text-align: center;
  padding: var(--spacing-8xl) 0 var(--spacing-6xl);
}
.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: 300;
  letter-spacing: -1px;
  margin-bottom: var(--spacing-xl);
}
.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-4xl);
}
.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
}

/* ========== Features ========== */
.features {
  padding: var(--spacing-6xl) 0;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-4xl);
}
.feature-icon {
  font-size: 32px;
  margin-bottom: var(--spacing-lg);
}
.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}
.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========== Pricing ========== */
.pricing {
  padding: var(--spacing-6xl) 0;
  background: var(--color-surface);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-3xl);
  max-width: 700px;
  margin: var(--spacing-4xl) auto 0;
}
.pricing-card {
  text-align: center;
}
.pricing-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}
.pricing-card .price {
  font-size: var(--font-size-4xl);
  font-weight: 300;
  margin: var(--spacing-lg) 0;
}
.pricing-card .price span {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.pricing-card ul {
  list-style: none;
  margin: var(--spacing-xl) 0;
  text-align: left;
}
.pricing-card ul li {
  padding: var(--spacing-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
}
.pricing-card ul li:last-child { border-bottom: none; }

/* ========== Footer ========== */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  margin-top: auto;
}
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}
.footer-brand {
  font-size: var(--font-size-lg);
  font-weight: 600;
}
.footer p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========== Auth Pages ========== */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-surface);
}
.auth-container {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-5xl);
}
.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}
.auth-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
}
.auth-header p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.auth-footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.auth-footer a {
  color: var(--color-accent);
  font-weight: 500;
}

/* ========== Alerts ========== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-lg);
}
.alert-error { background: rgba(220, 53, 69, 0.1); color: var(--color-error); border: 1px solid rgba(220, 53, 69, 0.2); }
.alert-success { background: rgba(40, 167, 69, 0.1); color: var(--color-success); border: 1px solid rgba(40, 167, 69, 0.2); }

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.toast {
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  animation: slideIn 0.3s ease;
}
.toast.success { border-left: 3px solid var(--color-success); }
.toast.error { border-left: 3px solid var(--color-error); }
@keyframes slideIn { from { opacity: 0; transform: translateX(100px); } to { opacity: 1; transform: translateX(0); } }

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .navbar-nav { gap: var(--spacing-lg); }
  .hero h1 { font-size: var(--font-size-3xl); }
  .container { padding: 0 var(--spacing-lg); }
}

/* ========== User Menu (Navbar) ========== */
.user-menu-wrapper {
  position: relative;
  display: inline-block;
}
.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  transition: background var(--transition-base);
}
.user-menu-trigger:hover { background: var(--color-surface); }
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.user-menu-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.user-menu-arrow {
  font-size: 12px;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}
.user-menu-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 160px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  padding: 4px 0;
  z-index: 1100;
}
.user-menu-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
}
.user-menu-dropdown a:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
}
.user-menu-dropdown a.logout-link { color: var(--color-error); }
.user-menu-dropdown a.logout-link:hover { background: rgba(220, 53, 69, 0.08); }

/* Responsive: 移动端隐藏用户名只显示头像 */
@media (max-width: 768px) {
  .user-menu-name { display: none; }
  .user-menu-arrow { display: none; }
}