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

/* === Theme Variables === */
:root, [data-theme="cyber"] {
  --bg: #0a0a0f;
  --bg-secondary: #0e0e16;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.08);
  --border-accent: rgba(0,255,136,0.12);
  --text: #e0e0e0;
  --text-strong: #fff;
  --text-muted: #666;
  --text-dim: #888;
  --text-code: #c0c0c0;
  --accent: #00ff88;
  --accent-hover: #33ffaa;
  --accent-dim: rgba(0,255,136,0.15);
  --accent-glow: rgba(0,255,136,0.25);
  --accent-subtle: rgba(0,255,136,0.08);
  --danger: #ff4466;
  --warning: #ffaa00;
  --radius: 16px;
  --radius-sm: 10px;
  --overlay-bg: rgba(10,10,15,0.6);
  --input-bg: rgba(255,255,255,0.04);
  --grid-color: rgba(0,255,136,0.03);
}

[data-theme="clean"] {
  --bg: #fff;
  --bg-secondary: #f5f5f7;
  --bg-card: #fff;
  --bg-card-hover: #f5f5f7;
  --border: #d2d2d7;
  --border-accent: #d2d2d7;
  --text: #1d1d1f;
  --text-strong: #000;
  --text-muted: #6e6e73;
  --text-dim: #86868b;
  --text-code: #1d1d1f;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-dim: rgba(0,113,227,0.1);
  --accent-glow: rgba(0,113,227,0.15);
  --accent-subtle: rgba(0,113,227,0.06);
  --danger: #ff3b30;
  --warning: #ff9500;
  --overlay-bg: rgba(255,255,255,0.7);
  --input-bg: rgba(0,0,0,0.03);
  --grid-color: rgba(0,0,0,0.03);
}

[data-theme="aiblue"] {
  --bg: #0a0e27;
  --bg-secondary: #0d1230;
  --bg-card: #111833;
  --bg-card-hover: #182040;
  --border: #1e2a4a;
  --border-accent: rgba(77,124,255,0.2);
  --text: #c8d6f0;
  --text-strong: #e8eeff;
  --text-muted: #7b8db8;
  --text-dim: #6b7daa;
  --text-code: #a8b8d8;
  --accent: #4d7cff;
  --accent-hover: #6c8fff;
  --accent-dim: rgba(77,124,255,0.15);
  --accent-glow: rgba(77,124,255,0.3);
  --accent-subtle: rgba(77,124,255,0.1);
  --danger: #ff6b7a;
  --warning: #ffbb33;
  --overlay-bg: rgba(10,14,39,0.7);
  --input-bg: rgba(255,255,255,0.04);
  --grid-color: rgba(77,124,255,0.03);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* === Background Effects === */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
  pointer-events: none;
}

.glow-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  z-index: 0;
  pointer-events: none;
}
.glow-orb-1 {
  width: 600px; height: 600px;
  background: var(--accent);
  top: -200px; right: -100px;
}
.glow-orb-2 {
  width: 400px; height: 400px;
  background: #0066ff;
  bottom: -100px; left: -100px;
}

[data-theme="clean"] .glow-orb { opacity: 0.05; }
[data-theme="clean"] .bg-grid { opacity: 0.5; }

/* === Layout === */
header, main, footer { position: relative; z-index: 1; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}
.logo span { color: var(--text-strong); }

.badge {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  border: 1px solid var(--border-accent);
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--accent-dim);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

/* === Hero === */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.15;
  margin-bottom: 16px;
}
.accent { color: var(--accent); }
.subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* === Glass Card === */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

[data-theme="clean"] .glass-card {
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* === Search === */
.search-card {
  padding: 32px;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.3s;
}
.search-input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.search-prefix {
  padding: 0 0 0 20px;
  font-weight: 700;
  color: var(--accent);
  font-size: 18px;
  user-select: none;
}

#asn-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-strong);
  font-size: 18px;
  padding: 16px 12px;
  font-family: inherit;
}
#asn-input::placeholder { color: var(--text-dim); }

#search-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 16px 28px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
#search-btn:hover { background: var(--accent-hover); }
#search-btn:active { transform: scale(0.97); }

.quick-links {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.quick-links button {
  background: var(--accent-dim);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.quick-links button:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
}

/* === Results === */
.results-section { margin-top: 32px; }

.result-card {
  padding: 32px;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}

.result-asn-info h2 {
  font-size: 1.6rem;
  color: var(--text-strong);
  font-weight: 700;
}
.result-asn-info h2 .asn-number {
  color: var(--accent);
  font-weight: 800;
}
.result-asn-info p {
  color: var(--text-dim);
  margin-top: 4px;
}

.country-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.upstream-section {
  margin-top: 20px;
}

.upstream-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.upstream-label h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-strong);
}
.upstream-count {
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 100px;
}

.upstream-list {
  display: grid;
  gap: 10px;
}

.upstream-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.upstream-item:hover {
  border-color: var(--border-accent);
  background: var(--accent-subtle);
}

.upstream-asn {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 700;
  color: var(--accent);
  font-size: 14px;
  white-space: nowrap;
  min-width: 80px;
}
.upstream-name {
  font-weight: 600;
  color: var(--text-strong);
  font-size: 14px;
}
.upstream-desc {
  color: var(--text-dim);
  font-size: 13px;
  margin-left: auto;
}

.no-upstreams {
  color: var(--text-dim);
  font-style: italic;
  padding: 12px 0;
}

.result-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.result-meta {
  font-size: 12px;
  color: var(--text-dim);
}
.remaining-badge {
  font-size: 12px;
  color: var(--warning);
  background: rgba(255,170,0,0.1);
  border: 1px solid rgba(255,170,0,0.2);
  padding: 4px 12px;
  border-radius: 100px;
}

/* === Error === */
.error-section { margin-top: 32px; }
.error-card {
  padding: 24px 32px;
  border-color: rgba(255,68,102,0.3);
  animation: slideUp 0.3s ease;
}
.error-card p {
  color: var(--danger);
  font-weight: 600;
}
.error-card .error-hint {
  color: var(--text-dim);
  font-weight: 400;
  margin-top: 6px;
  font-size: 14px;
}

/* === Features === */
.features-section { margin-top: 64px; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 28px;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-glow);
}
.feature-icon { font-size: 2rem; margin-bottom: 14px; }
.feature-card h3 {
  font-size: 1rem;
  color: var(--text-strong);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* === Register === */
.register-section { margin-top: 64px; }
.register-card {
  padding: 40px;
  text-align: center;
}
.register-card h2 {
  font-size: 1.5rem;
  color: var(--text-strong);
  margin-bottom: 10px;
}
.register-card > p {
  color: var(--text-dim);
  margin-bottom: 28px;
}

.register-form {
  display: flex;
  max-width: 480px;
  margin: 0 auto;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--input-bg);
  transition: border-color 0.3s;
}
.register-form:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

#register-email {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-strong);
  font-size: 15px;
  padding: 14px 18px;
  font-family: inherit;
}
#register-email::placeholder { color: var(--text-dim); }

#register-btn {
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  font-family: inherit;
}
#register-btn:hover { background: var(--accent-hover); }
#register-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.register-result {
  margin-top: 16px;
  font-size: 14px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
}
.register-result.success {
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
}
.register-result.error {
  color: var(--danger);
  background: rgba(255,68,102,0.1);
  border: 1px solid rgba(255,68,102,0.2);
}

.rate-info {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* === Footer === */
footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-dim);
  font-size: 14px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* === Loading === */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--accent-dim);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.hidden { display: none !important; }

/* === Mobile === */
@media (max-width: 640px) {
  header { padding: 16px 20px; }
  .hero { padding: 40px 0 24px; }
  .hero h1 { font-size: 1.8rem; }
  .subtitle { font-size: 1rem; }
  .search-card { padding: 20px; }
  #asn-input { font-size: 16px; padding: 14px 10px; }
  #search-btn { padding: 14px 18px; }
  #search-btn span { display: none; }
  .result-card { padding: 20px; }
  .result-header { flex-direction: column; }
  .upstream-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .upstream-desc { margin-left: 0; }
  .register-form { flex-direction: column; }
  #register-btn { border-radius: 0; }
  .register-card { padding: 28px 20px; }
  .result-footer { flex-direction: column; align-items: flex-start; }
}

/* API Documentation */
.api-docs-section { margin-top: 48px; }
.api-docs-card { padding: 40px; }
.api-docs-card h2 { font-size: 1.6rem; margin-bottom: 8px; color: var(--text-strong); }
.api-docs-card > p { color: var(--text-dim); margin-bottom: 32px; }
.api-endpoint { display: flex; align-items: center; gap: 12px; padding: 16px; background: var(--accent-subtle); border: 1px solid var(--accent-dim); border-radius: 8px; margin-bottom: 28px; font-family: 'JetBrains Mono', monospace; }
.api-method { background: var(--accent); color: var(--bg); font-weight: 700; font-size: 0.8rem; padding: 4px 10px; border-radius: 4px; }
.api-path { color: var(--text); font-size: 1rem; }
.api-detail { margin-bottom: 24px; }
.api-detail h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 10px; }
.api-detail p { color: var(--text-dim); font-size: 0.95rem; line-height: 1.6; margin-bottom: 10px; }
.api-detail pre { background: var(--input-bg); border: 1px solid var(--border); border-radius: 8px; padding: 16px; overflow-x: auto; }
.api-detail code { font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; color: var(--text-code); line-height: 1.7; }
.api-table { width: 100%; border-collapse: collapse; }
.api-table td { padding: 10px 16px; border-bottom: 1px solid var(--border); color: var(--text-code); font-size: 0.9rem; }
.api-table tr td:first-child { color: var(--text); font-weight: 500; }

/* Try API Box */
.try-api-box { text-align: center; margin-top: 20px; padding: 16px; background: var(--accent-subtle); border: 1px solid var(--accent-dim); border-radius: 10px; }
.try-api-label { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-right: 8px; }
.try-api-url { display: block; margin: 10px auto 8px; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: var(--text-code); background: var(--input-bg); padding: 10px 16px; border-radius: 6px; cursor: pointer; transition: all 0.2s; word-break: break-all; }
.try-api-url:hover { background: var(--accent-subtle); color: var(--text); }
.try-api-url.copied { background: var(--accent-dim); color: var(--accent); }
.try-api-url.copied::after { content: ' ✓ copied!'; }
.try-api-hint { font-size: 0.75rem; color: var(--text-muted); }