/* === DESIGN TOKENS === */
:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-muted: #9ca3af;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-shadow: rgba(0, 0, 0, 0.04);
  --color-shadow-hover: rgba(0, 0, 0, 0.1);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --container-max: 1200px;
  --border-radius: 14px;
  --border-radius-sm: 10px;
  --border-radius-pill: 999px;

  /* Category colors */
  --cat-cloud: #2563eb;
  --cat-ai: #7c3aed;
  --cat-analytics: #ea580c;
  --cat-devtools: #0d9488;
  --cat-database: #16a34a;
  --cat-communication: #0284c7;
  --cat-design: #dc2626;
  --cat-financial: #475569;
  --cat-other: #6b7280;
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

/* === LAYOUT === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.hidden {
  display: none !important;
}

.print-meta,
.print-only {
  display: none;
}

/* === HEADER === */
.site-header {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  padding: var(--space-3xl) 0 var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent);
  pointer-events: none;
}

.header-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.site-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #ffffff;
  margin-bottom: var(--space-sm);
}

.site-subtitle {
  font-size: 1.125rem;
  color: #94a3b8;
  font-weight: 400;
  line-height: 1.6;
}

.site-subtitle strong {
  color: #e2e8f0;
  font-weight: 600;
}

/* === TOOLBAR === */
.toolbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 251, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.toolbar-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.search-wrapper {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 10px 12px 10px 40px;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

#search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), 0 1px 2px rgba(0, 0, 0, 0.05);
}

#search-input::placeholder {
  color: var(--color-text-muted);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-left: auto;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #1e293b, #334155);
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.btn-download:hover {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.btn-download:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* Language dropdown */
.lang-dropdown {
  position: relative;
  flex-shrink: 0;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 0.8125rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  line-height: 1;
  white-space: nowrap;
}

.lang-trigger:hover {
  border-color: var(--color-text-muted);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.lang-trigger-flag {
  font-size: 1.125rem;
  line-height: 1;
}

.lang-trigger-label {
  line-height: 1.2;
}

.lang-chevron {
  transition: transform 0.2s ease;
  opacity: 0.5;
}

.lang-dropdown.open .lang-chevron {
  transform: rotate(180deg);
}

.lang-list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  max-height: 320px;
  overflow-y: auto;
  margin: 0;
  padding: 4px;
  list-style: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
  z-index: 100;
}

.lang-dropdown.open .lang-list {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
  transition: background 0.15s;
}

.lang-option:hover,
.lang-option.focused {
  background: var(--color-surface-alt, #f5f5f7);
}

.lang-option[aria-selected="true"] {
  background: var(--color-surface-alt, #f5f5f7);
  font-weight: 600;
}

.lang-option-flag {
  font-size: 1.125rem;
  line-height: 1;
}

.lang-option-label {
  line-height: 1.2;
}

.results-count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}

/* Filters */
.filter-row {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}

.filter-row::-webkit-scrollbar {
  display: none;
}

.filter-buttons {
  display: contents;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  font-family: var(--font-family);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.filter-btn:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.filter-btn.active {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
  box-shadow: 0 2px 8px rgba(17, 24, 39, 0.2);
}

/* Deal-type filter row */
.deal-filter-row {
  margin-top: var(--space-sm);
}

.filter-btn--deal.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* === MAIN CONTENT === */
.perks-container {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

/* Category sections */
.category-section {
  margin-bottom: var(--space-2xl);
}

.category-section:last-child {
  margin-bottom: 0;
}

.category-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.category-count {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-border-light);
  padding: 2px 10px;
  border-radius: var(--border-radius-pill);
  letter-spacing: 0.02em;
}

/* Category color accents */
.category-heading[data-cat="cloud"] { border-bottom-color: var(--cat-cloud); }
.category-heading[data-cat="ai"] { border-bottom-color: var(--cat-ai); }
.category-heading[data-cat="analytics"] { border-bottom-color: var(--cat-analytics); }
.category-heading[data-cat="devtools"] { border-bottom-color: var(--cat-devtools); }
.category-heading[data-cat="database"] { border-bottom-color: var(--cat-database); }
.category-heading[data-cat="communication"] { border-bottom-color: var(--cat-communication); }
.category-heading[data-cat="design"] { border-bottom-color: var(--cat-design); }
.category-heading[data-cat="financial"] { border-bottom-color: var(--cat-financial); }
.category-heading[data-cat="other"] { border-bottom-color: var(--cat-other); }

/* Card grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: var(--space-md);
}

/* === PERK CARD === */
.perk-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.perk-card:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

/* Card category accent colors */
.category-section[data-category="cloud"] .perk-card { border-left-color: var(--cat-cloud); }
.category-section[data-category="ai"] .perk-card { border-left-color: var(--cat-ai); }
.category-section[data-category="analytics"] .perk-card { border-left-color: var(--cat-analytics); }
.category-section[data-category="devtools"] .perk-card { border-left-color: var(--cat-devtools); }
.category-section[data-category="database"] .perk-card { border-left-color: var(--cat-database); }
.category-section[data-category="communication"] .perk-card { border-left-color: var(--cat-communication); }
.category-section[data-category="design"] .perk-card { border-left-color: var(--cat-design); }
.category-section[data-category="financial"] .perk-card { border-left-color: var(--cat-financial); }
.category-section[data-category="other"] .perk-card { border-left-color: var(--cat-other); }

.perk-card__company {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.perk-card__program {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

.perk-card__program a {
  color: var(--color-text);
  text-decoration: none;
}

.perk-card__program a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.perk-card__value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.perk-card__description {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  flex: 1;
  margin-bottom: var(--space-sm);
}

.perk-card__requirements {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  padding: var(--space-sm) var(--space-sm);
  background: var(--color-bg);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--space-lg);
}

.perk-card__apply {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-family);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  background: none;
  border: none;
  padding: 6px 0;
  cursor: pointer;
  margin-top: auto;
  text-decoration: none;
  transition: gap 0.2s, color 0.2s;
}

.perk-card__apply:hover {
  gap: 8px;
  color: var(--color-primary-hover);
  text-decoration: none;
}

/* === EMPTY STATE === */
.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--color-text-muted);
}

.empty-state svg {
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

.empty-state p {
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
}

.btn-clear {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid transparent;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

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

/* === FOOTER === */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-xl);
  text-align: center;
  background: var(--color-surface);
}

.footer-updated {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.footer-source {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

.footer-copyright strong {
  color: var(--color-text-secondary);
  font-weight: 600;
}

.footer-copyright a {
  color: var(--color-text-secondary);
  font-weight: 500;
  text-decoration: none;
}

.footer-copyright a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-contribute {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.footer-contribute a {
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  transition: color 0.2s;
}

.footer-contribute a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.github-icon {
  vertical-align: middle;
}

/* === RESPONSIVE === */
@media (max-width: 640px) {
  .site-header {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

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

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

  .toolbar-row {
    flex-direction: column;
    align-items: stretch;
  }

  .search-wrapper {
    max-width: none;
  }

  .toolbar-actions {
    justify-content: space-between;
    margin-left: 0;
  }

  .lang-list {
    right: auto;
    left: 0;
  }

  .category-heading {
    font-size: 1.125rem;
  }

  .perk-card {
    padding: var(--space-md);
  }

  .perk-card__value {
    font-size: 1.125rem;
  }
}