/* ─── Design tokens ─────────────────────────────────────────────────────── */
:root {
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  --white: #ffffff;

  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow:    0 1px 3px rgba(0, 0, 0, 0.10), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);

  --transition: 150ms ease;
}

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

/* ─── Base ──────────────────────────────────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  padding: 2rem 0 4rem;
}

a {
  color: var(--slate-700);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ─── Layout ────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Header ────────────────────────────────────────────────────────────── */
.site-header {
  background-color: var(--slate-700);
  color: var(--white);
  padding: 2.5rem 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--white);
  line-height: 1.2;
}

.site-subtitle {
  margin-top: 0.375rem;
  font-size: 0.9375rem;
  color: var(--slate-300);
  max-width: 46ch;
}

.contribute-link {
  display: inline-block;
  padding: 0.5rem 1.125rem;
  background-color: var(--white);
  color: var(--slate-800);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: background-color var(--transition);
}

.contribute-link:hover {
  background-color: var(--slate-100);
  text-decoration: none;
}

/* ─── Filter bar ────────────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.5625rem 0.875rem 0.5625rem 2.25rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background-color: var(--white);
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--gray-900);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input::placeholder {
  color: var(--gray-400);
}

.search-input:focus {
  border-color: var(--slate-400);
  box-shadow: 0 0 0 3px rgba(51, 65, 85, 0.12);
}

.filter-select {
  padding: 0.5625rem 2rem 0.5625rem 0.875rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background-color: var(--white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234b5563' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  -webkit-appearance: none;
  appearance: none;
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--gray-700);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.filter-select:focus {
  border-color: var(--slate-400);
  box-shadow: 0 0 0 3px rgba(51, 65, 85, 0.12);
}

/* ─── Results bar ───────────────────────────────────────────────────────── */
.results-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.results-count {
  font-size: 0.875rem;
  color: var(--gray-600);
}

.clear-btn {
  font-size: 0.875rem;
  font-family: var(--font);
  color: var(--slate-700);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.clear-btn:hover {
  text-decoration: underline;
}

/* ─── Card grid ─────────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

/* ─── Org card ──────────────────────────────────────────────────────────── */
.org-card {
  background-color: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.org-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--slate-300);
  transform: translateY(-1px);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.25rem 1.25rem 0;
}

.org-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
  line-height: 1.3;
}

/* ─── Type badges ───────────────────────────────────────────────────────── */
.type-badge {
  display: inline-block;
  padding: 0.1875rem 0.5625rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-project {
  background-color: #dbeafe;
  color: #1d4ed8;
}

.badge-product {
  background-color: #dcfce7;
  color: #15803d;
}

.badge-education {
  background-color: #fef3c7;
  color: #b45309;
}

.badge-design {
  background-color: #f3e8ff;
  color: #7e22ce;
}

/* ─── Card body ─────────────────────────────────────────────────────────── */
.card-body {
  flex: 1;
  padding: 0.75rem 1.25rem 1rem;
}

.org-description {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Card footer / links ───────────────────────────────────────────────── */
.card-footer {
  padding: 0.875rem 1.25rem 1.125rem;
  border-top: 1px solid var(--gray-100);
}

.org-links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.org-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  color: var(--gray-600);
  background-color: var(--gray-100);
  transition: background-color var(--transition), color var(--transition);
  flex-shrink: 0;
}

.org-link:hover {
  background-color: var(--slate-700);
  color: var(--white);
  text-decoration: none;
}

/* ─── States ────────────────────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

.empty-state,
.loading-state,
.error-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--gray-600);
}

.empty-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.empty-hint {
  font-size: 0.875rem;
}

.error-state {
  color: #dc2626;
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: left;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--slate-700);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--gray-200);
  padding: 1.5rem 0;
  background-color: var(--white);
}

.site-footer p {
  font-size: 0.875rem;
  color: var(--gray-600);
  text-align: center;
}

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .site-header {
    padding: 2rem 0;
  }

  .site-title {
    font-size: 1.5rem;
  }

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

  .search-wrapper {
    min-width: 100%;
  }

  .filter-select {
    flex: 1;
  }

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