/* ============================================
   NatureDesk — Biodiversity Credit Marketplace
   The Bloomberg Terminal for Biodiversity Credits
   ============================================ */

:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-200: #bbf7d0;
  --green-300: #86efac;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;
  --green-950: #052e16;

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  --amber-400: #fbbf24;
  --amber-500: #f59e0b;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--slate-800);
  background: var(--slate-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--green-700); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--green-600); }

/* ============ NAVIGATION ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  transition: all 0.3s ease;
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--slate-900);
}

.nav-logo .icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--green-600), var(--green-800));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--slate-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--slate-900); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: var(--green-700);
  color: white !important;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.nav-cta:hover {
  background: var(--green-600);
  color: white !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ============ HERO SECTION ============ */
.hero {
  padding: 140px 24px 100px;
  background: linear-gradient(180deg, var(--green-950) 0%, var(--slate-900) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(22,163,74,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(34,197,94,0.08) 0%, transparent 50%);
}

.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(34,197,94,0.15);
  border: 1px solid rgba(34,197,94,0.3);
  border-radius: 100px;
  color: var(--green-300);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--green-400);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  max-width: 800px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--green-300), var(--green-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--slate-300);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--green-500);
  color: white;
}
.btn-primary:hover {
  background: var(--green-400);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(34,197,94,0.3);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 1px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  color: white;
  border-color: rgba(255,255,255,0.4);
}

/* Hero stats ticker */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.hero-stat {
  text-align: left;
}

.hero-stat .value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--green-400);
}

.hero-stat .label {
  font-size: 0.8rem;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* ============ FEATURES / VALUE PROPS ============ */
.features {
  padding: 100px 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header .overline {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--green-700);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--slate-500);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--green-50);
  border: 1px solid var(--green-100);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.925rem;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ============ LIVE TICKER / MARKET DATA ============ */
.market-ticker {
  background: var(--slate-900);
  padding: 80px 24px;
  color: white;
}

.ticker-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.ticker-header {
  text-align: center;
  margin-bottom: 48px;
}

.ticker-header h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.ticker-header p {
  color: var(--slate-400);
  font-size: 1rem;
}

.ticker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.ticker-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s;
}

.ticker-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--green-700);
}

.ticker-item .habitat-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(34,197,94,0.15);
  color: var(--green-400);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.ticker-item .credit-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--slate-100);
  margin-bottom: 4px;
}

.ticker-item .credit-region {
  font-size: 0.8rem;
  color: var(--slate-400);
}

.ticker-item .price {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--green-400);
  text-align: right;
}

.ticker-item .price-unit {
  font-size: 0.7rem;
  color: var(--slate-500);
  display: block;
  margin-top: 2px;
}

/* ============ CTA SECTION ============ */
.cta-section {
  padding: 100px 24px;
  text-align: center;
}

.cta-box {
  max-width: 700px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--green-800), var(--green-900));
  border-radius: 24px;
  padding: 64px 48px;
  color: white;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34,197,94,0.2), transparent);
  border-radius: 50%;
}

.cta-box h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
}

.cta-box p {
  color: var(--green-200);
  margin-bottom: 32px;
  font-size: 1.05rem;
  position: relative;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

.cta-form input {
  flex: 1;
  padding: 14px 18px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: white;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.cta-form input::placeholder { color: rgba(255,255,255,0.5); }
.cta-form input:focus { border-color: var(--green-400); }

.cta-form select {
  padding: 14px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: white;
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
}

.cta-form select option { color: var(--slate-900); }

.cta-form .btn-primary {
  white-space: nowrap;
}

/* ============ HOW IT WORKS ============ */
.how-it-works {
  padding: 100px 24px;
  background: white;
}

.steps-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.step {
  text-align: center;
  padding: 24px;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--green-50);
  border: 2px solid var(--green-200);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--green-700);
  font-size: 1.1rem;
  margin: 0 auto 16px;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--slate-900);
}

.step p {
  font-size: 0.9rem;
  color: var(--slate-500);
  line-height: 1.6;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--slate-900);
  color: var(--slate-400);
  padding: 48px 24px;
  text-align: center;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}

.footer p {
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  list-style: none;
  margin-top: 16px;
}

.footer-links a {
  color: var(--slate-400);
  font-size: 0.85rem;
}
.footer-links a:hover { color: var(--green-400); }

/* ============ MARKETPLACE PAGE ============ */
.page-header {
  padding: 100px 24px 40px;
  background: var(--slate-900);
  color: white;
}

.page-header-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--slate-400);
  font-size: 1rem;
}

.marketplace-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 80px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
}

/* Filters sidebar */
.filters-panel {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  padding: 24px;
  height: fit-content;
  position: sticky;
  top: 88px;
}

.filters-panel h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-group {
  margin-bottom: 20px;
}

.filter-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--slate-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.filter-group select,
.filter-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--slate-700);
  background: white;
  outline: none;
  transition: border-color 0.2s;
}

.filter-group select:focus,
.filter-group input:focus {
  border-color: var(--green-500);
}

.filter-group select optgroup {
  font-weight: 600;
  font-style: normal;
  color: var(--slate-700);
  padding-top: 8px;
}

.filter-group select option {
  padding-left: 8px;
  color: var(--slate-900);
}

.price-range {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.filter-btn {
  width: 100%;
  padding: 12px;
  background: var(--green-700);
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
}

.filter-btn:hover { background: var(--green-600); }

.filter-reset {
  width: 100%;
  padding: 10px;
  background: none;
  color: var(--slate-500);
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.2s;
}

.filter-reset:hover {
  background: var(--slate-50);
  color: var(--slate-700);
}

/* Credits grid */
.credits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.credit-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.credit-card:hover {
  border-color: var(--green-300);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  color: inherit;
}

.credit-card-header {
  padding: 20px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.credit-card-header .tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.tag-verified {
  background: var(--green-50);
  color: var(--green-700);
  border: 1px solid var(--green-200);
}

.tag-pending {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.credit-card-header .price-tag {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--slate-900);
}

.credit-card-body {
  padding: 16px 20px 20px;
}

.credit-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 6px;
  line-height: 1.3;
}

.credit-card-body .region {
  font-size: 0.85rem;
  color: var(--slate-500);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.credit-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--slate-100);
}

.credit-metric {
  text-align: center;
}

.credit-metric .value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-900);
}

.credit-metric .label {
  font-size: 0.65rem;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.credit-card-footer {
  padding: 12px 20px;
  background: var(--slate-50);
  border-top: 1px solid var(--slate-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.credit-card-footer .seller {
  font-size: 0.8rem;
  color: var(--slate-500);
}

.credit-card-footer .habitat-badge {
  padding: 3px 10px;
  background: var(--green-50);
  color: var(--green-700);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Sort & results bar */
.results-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.results-count {
  font-size: 0.9rem;
  color: var(--slate-500);
}

.results-count strong {
  color: var(--slate-900);
}

.sort-select {
  padding: 8px 14px;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--slate-600);
  background: white;
  cursor: pointer;
}

/* ============ CREDIT DETAIL PAGE ============ */
.credit-detail {
  max-width: 1280px;
  margin: 0 auto;
  padding: 100px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 40px;
}

.credit-main h1 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 12px;
}

.credit-main .meta {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--slate-600);
}

.credit-description {
  font-size: 1rem;
  color: var(--slate-600);
  line-height: 1.8;
  margin-bottom: 32px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.metric-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}

.metric-card .icon { font-size: 24px; margin-bottom: 8px; }

.metric-card .value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
}

.metric-card .label {
  font-size: 0.75rem;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Species list */
.species-section h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--slate-900);
}

.species-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.species-tag {
  padding: 6px 14px;
  background: var(--green-50);
  border: 1px solid var(--green-200);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--green-800);
  font-weight: 500;
}

/* Purchase sidebar */
.purchase-panel {
  position: sticky;
  top: 88px;
  height: fit-content;
}

.purchase-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-lg);
}

.purchase-card .price {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--slate-900);
  margin-bottom: 4px;
}

.purchase-card .price-sub {
  font-size: 0.8rem;
  color: var(--slate-500);
  margin-bottom: 20px;
}

.purchase-card .btn {
  width: 100%;
  justify-content: center;
  margin-bottom: 12px;
}

.purchase-details {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--slate-200);
}

.purchase-detail-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 0.85rem;
}

.purchase-detail-row .label { color: var(--slate-500); }
.purchase-detail-row .value { color: var(--slate-900); font-weight: 600; }

/* Seller card */
.seller-card {
  background: white;
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  padding: 24px;
  margin-top: 16px;
}

.seller-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.seller-card .org {
  font-size: 0.85rem;
  color: var(--slate-500);
  margin-bottom: 12px;
}

.seller-card a {
  font-size: 0.85rem;
  font-weight: 600;
}

/* ============ SELLER PROFILE PAGE ============ */
.seller-profile-header {
  padding: 100px 24px 40px;
  background: var(--slate-900);
  color: white;
}

.seller-profile-header-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.seller-profile-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.seller-profile-header .org {
  color: var(--green-400);
  font-weight: 600;
  margin-bottom: 12px;
}

.seller-profile-header .bio {
  color: var(--slate-300);
  max-width: 700px;
  line-height: 1.7;
}

.seller-stats {
  display: flex;
  gap: 32px;
  margin-top: 24px;
}

.seller-stat .value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--green-400);
}

.seller-stat .label {
  font-size: 0.75rem;
  color: var(--slate-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============ LOADING & EMPTY STATES ============ */
.loading {
  text-align: center;
  padding: 80px 24px;
  color: var(--slate-400);
  font-size: 0.95rem;
}

.loading .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--slate-200);
  border-top-color: var(--green-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

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

.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--slate-400);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
}

/* ============ TOAST NOTIFICATION ============ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--slate-900);
  color: white;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { border-left: 4px solid var(--green-500); }
.toast.error { border-left: 4px solid #ef4444; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .nav-links { display: none; }

  .hero { padding: 120px 24px 60px; }
  .hero h1 { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  .marketplace-layout {
    grid-template-columns: 1fr;
  }

  .filters-panel {
    position: static;
  }

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

  .credit-detail {
    grid-template-columns: 1fr;
    padding-top: 80px;
  }

  .purchase-panel {
    position: static;
  }

  .cta-form {
    flex-direction: column;
  }

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

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