:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #818cf8;
  --accent: #8b5cf6;
  --accent-light: #a78bfa;
  --success: #10b981;
  --bg: #fafbfc;
  --bg-secondary: #f3f4f6;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.05), 0 1px 2px -1px rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --gradient-shine: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header .container {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: -0.025em;
  transition: transform 0.2s ease;
}

.logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: var(--gradient-primary);
  padding: 6px;
  border-radius: var(--radius-sm);
  color: white;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--bg-secondary);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
}

.search-box {
  margin-left: auto;
  position: relative;
  max-width: 300px;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  pointer-events: none;
}

#searchInput {
  width: 100%;
  padding: 0.625rem 1rem 0.625rem 2.75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  outline: none;
  background: var(--bg);
  transition: all 0.2s ease;
}

#searchInput:focus {
  border-color: var(--primary);
  background: var(--bg-card);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), var(--shadow-md);
  transform: translateY(-1px);
}

#searchInput::placeholder {
  color: var(--text-muted);
  font-weight: 500;
}

/* Search Dropdown */
.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  max-height: 400px;
  overflow-y: auto;
  z-index: 1000;
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s ease;
  border-bottom: 1px solid var(--border-light);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--bg-secondary);
}

.search-result-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: var(--bg);
  padding: 4px;
  flex-shrink: 0;
}

.search-result-logo-placeholder {
  width: 32px;
  height: 32px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.search-result-info {
  flex: 1;
  min-width: 0;
}

.search-result-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-category {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.search-no-results {
  padding: 16px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Main Content */
main {
  flex: 1;
  padding: 2rem 0;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.025em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.6;
}

/* Filters */
.filters {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-secondary);
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.filter-btn.active {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(99, 102, 241, 0.3);
}

.product-card:hover::before {
  opacity: 1;
}

.product-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.product-logo {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--primary);
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: transform 0.2s ease;
}

.product-card:hover .product-logo {
  transform: scale(1.05);
}

.product-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-name {
  font-weight: 700;
  font-size: 1.1875rem;
  letter-spacing: -0.0125em;
  color: var(--text);
}

.product-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.product-categories {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.category-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-secondary);
  padding: 0.25rem 0.625rem;
  border-radius: 6px;
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.product-card:hover .category-tag {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  border-color: rgba(99, 102, 241, 0.2);
}

.product-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

/* Product Detail Page */
.product-detail {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 3rem;
}

@media (max-width: 900px) {
  .product-detail {
    grid-template-columns: 1fr;
  }
}

.product-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 5rem;
}

.product-info-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.product-info-logo {
  width: 64px;
  height: 64px;
  background: var(--bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  overflow: hidden;
}

.product-info-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-info-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.stat {
  text-align: center;
}

.stat-value {
  font-weight: 700;
  font-size: 1rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

/* Changelog List */
.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.changelog-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.changelog-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.changelog-item:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(99, 102, 241, 0.2);
}

.changelog-item:hover::before {
  opacity: 1;
}

.changelog-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.changelog-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.0125em;
  color: var(--text);
  line-height: 1.4;
}

.changelog-title a {
  color: inherit;
  text-decoration: none;
}

.changelog-title a:hover {
  text-decoration: underline;
}

.changelog-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.changelog-product {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.changelog-content {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  border-radius: 6px;
  margin-left: 0.5rem;
  letter-spacing: 0.0125em;
}

.badge-major {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  color: #dc2626;
  border: 1px solid #fecaca;
  box-shadow: 0 1px 2px rgba(220, 38, 38, 0.1);
}

.badge-version {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  color: #0369a1;
  border: 1px solid #bae6fd;
  box-shadow: 0 1px 2px rgba(3, 105, 161, 0.1);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.pagination button {
  padding: 0.625rem 1.25rem;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all 0.2s ease;
  box-shadow: var(--shadow);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.pagination span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Utilities */
.loading {
  text-align: center;
  padding: 4rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.error {
  background: #fef2f2;
  color: #dc2626;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid #fee2e2;
  text-align: center;
  margin: 2rem 0;
}

/* Nav auth */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 1rem;
  flex-shrink: 0;
}

.nav-user {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* User avatar dropdown */
.nav-user-menu {
  position: relative;
}

.nav-avatar-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s;
}

.nav-avatar-btn:hover {
  opacity: 0.85;
}

.nav-avatar-initials {
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1;
}

.nav-dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
}

.nav-dropdown.open {
  display: block;
}

.nav-dropdown-header {
  padding: 0.6rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-dropdown-item {
  display: block;
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
  color: var(--text);
  text-decoration: none;
  transition: background 0.12s;
}

.nav-dropdown-item:hover {
  background: var(--bg-secondary);
  color: var(--primary);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border-light);
  margin: 0.25rem 0;
}

.nav-dropdown-item-danger {
  color: #dc2626;
}

.nav-dropdown-item-danger:hover {
  background: #fef2f2;
  color: #dc2626;
}

.nav-link-btn {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: background 0.15s, border-color 0.15s;
}

.nav-link-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
  color: var(--primary);
}

.nav-link-btn-primary {
  background: var(--primary);
  color: #fff !important;
  border-color: var(--primary);
}

.nav-link-btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #fff !important;
}

/* Auth pages */
.auth-page {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 3rem 1rem;
  min-height: 60vh;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.5rem;
}

.auth-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0 0 1.75rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

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

.auth-field input {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.auth-field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.auth-btn {
  padding: 0.7rem 1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 0.25rem;
}

.auth-btn:hover:not(:disabled) {
  background: var(--primary-hover);
}

.auth-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.auth-error {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fee2e2;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.875rem;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.auth-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 0.25rem 0 0;
}

.password-strength {
  margin-top: 0.5rem;
}

.password-strength-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 0.35rem;
}

.password-strength-bar span {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  transition: background 0.2s;
}

.password-strength-bar span.filled-weak { background: #ef4444; }
.password-strength-bar span.filled-fair { background: #f97316; }
.password-strength-bar span.filled-good { background: #eab308; }
.password-strength-bar span.filled-strong { background: #22c55e; }

.password-strength-label {
  font-size: 0.7rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.password-strength-label.weak { color: #ef4444; }
.password-strength-label.fair { color: #f97316; }
.password-strength-label.good { color: #eab308; }
.password-strength-label.strong { color: #22c55e; }

.password-reqs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.password-reqs li {
  font-size: 0.7rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.password-reqs li::before {
  content: '✗';
  color: #ef4444;
  font-weight: 700;
}

.password-reqs li.met {
  color: #16a34a;
}

.password-reqs li.met::before {
  content: '✓';
  color: #22c55e;
}

.auth-switch {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 1.25rem 0 0;
}

.auth-switch a {
  color: var(--primary);
  font-weight: 500;
}

.auth-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 0 2rem;
  text-align: center;
}

.auth-success svg {
  color: var(--success);
}

.auth-success h2 {
  margin: 0;
  font-size: 1.4rem;
}

.auth-success p {
  margin: 0;
  color: var(--text-secondary);
}

/* Follow button */
.follow-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--primary);
  color: var(--primary);
  background: transparent;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

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

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

.follow-btn.following:hover {
  background: #dc2626;
  border-color: #dc2626;
}

.follow-btn-guest {
  border-style: dashed;
}

/* Footer */
.footer {
  margin-top: auto;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card) 100%);
  border-top: 1px solid var(--border-light);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Profile Page */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.profile-field {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-light);
}

.profile-field:last-child {
  border-bottom: none;
}

.profile-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  margin-bottom: 0.5rem;
}

.profile-value {
  font-size: 1rem;
  color: var(--text);
  font-weight: 500;
}

.auth-container {
  max-width: 600px;
}

.auth-container .auth-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.form-group input {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.btn-primary {
  padding: 0.7rem 1.25rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn-secondary {
  padding: 0.7rem 1.25rem;
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border-light);
  border-color: var(--text-secondary);
}

.btn-secondary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.error-message {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fee2e2;
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.success-message {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* Feed page */
.feed-section {
  margin-bottom: 2.5rem;
}

.feed-section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.feed-products {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feed-product-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem 0.375rem 0.375rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.feed-product-chip:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.feed-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  text-align: center;
  color: var(--text-secondary);
}

.feed-empty h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.5rem;
}

.feed-empty p {
  margin: 0;
  font-size: 0.95rem;
}

/* Hero Section */
.hero {
  background: var(--gradient-primary);
  color: white;
  padding: 4rem 0;
  margin-bottom: 2rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-shine);
  opacity: 0.1;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.95;
  margin-bottom: 2rem;
  line-height: 1.6;
  font-weight: 400;
}

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

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 1rem;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255,255,255,0.15);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.25);
}

/* Hero Responsive Design */
@media (max-width: 768px) {
  .hero {
    padding: 3rem 0;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    gap: 0.75rem;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}