:root {
  --bg-dark: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1f2937;
  --border-color: #1f2937;
  --border-glow: #374151;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --solana-purple: #9945FF;
  --solana-green: #14F195;
  --accent-gold: #f59e0b;
  --accent-danger: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(153, 69, 255, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(20, 241, 149, 0.05) 0%, transparent 40%);
}

input, select, textarea {
  min-width: 0;
  font-family: inherit;
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px 20px;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #9945FF 0%, #14F195 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 0 16px rgba(20, 241, 149, 0.25);
  flex-shrink: 0;
}

.brand-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  background: rgba(20, 241, 149, 0.1);
  color: #14F195;
  border: 1px solid rgba(20, 241, 149, 0.25);
  padding: 6px 12px;
  border-radius: 20px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: #14F195;
  border-radius: 50%;
  box-shadow: 0 0 8px #14F195;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.lang-switcher {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 3px;
  flex-shrink: 0;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.lang-btn.active {
  background: #374151;
  color: #fff;
}

.lang-btn:hover:not(.active) {
  color: var(--text-main);
}

/* Top HUD Grid */
.hud-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.hud-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px 20px;
  transition: transform 0.2s, border-color 0.2s;
}

.hud-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-glow);
}

.hud-card.highlight {
  border-color: rgba(20, 241, 149, 0.4);
  background: linear-gradient(180deg, rgba(20, 241, 149, 0.08) 0%, var(--bg-card) 100%);
}

.hud-card.accent {
  border-color: rgba(153, 69, 255, 0.4);
}

.hud-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.hud-value {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-family: var(--font-mono);
  color: #fff;
  margin-bottom: 4px;
}

.hud-card.highlight .hud-value {
  color: #14F195;
  text-shadow: 0 0 10px rgba(20, 241, 149, 0.3);
}

.hud-card.accent .hud-value {
  color: #c4b5fd;
}

.hud-sub {
  font-size: 12px;
  color: var(--text-dim);
}

/* Controls Card */
.controls-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.controls-left h2 {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.controls-left p {
  font-size: 13px;
  color: var(--text-muted);
}

.btn-ping-all {
  background: linear-gradient(135deg, #14F195 0%, #059669 100%);
  color: #000;
  border: none;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  transition: opacity 0.2s, transform 0.15s;
  box-shadow: 0 0 16px rgba(20, 241, 149, 0.25);
}

.btn-ping-all:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

/* Recommendation Box */
.recommend-box {
  background: rgba(20, 241, 149, 0.05);
  border: 1px solid rgba(20, 241, 149, 0.35);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 24px;
}

.recommend-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.recommend-badge {
  font-size: 12.5px;
  font-weight: 800;
  color: #14F195;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.recommend-tag {
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: #14F195;
  background: rgba(20, 241, 149, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
}

.recommend-url-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.recommend-url-row input {
  flex: 1;
  background: #0f172a;
  border: 1px solid #374151;
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  font-family: var(--font-mono);
}

.btn-copy-best {
  background: #14F195;
  color: #000;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  transition: opacity 0.15s;
}

.btn-copy-best:hover {
  opacity: 0.9;
}

.recommend-tip {
  font-size: 12px;
  color: #94a3b8;
  line-height: 1.5;
}

/* Table */
.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 12px;
}

.table-header h3 {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
}

.filter-pills {
  display: flex;
  gap: 8px;
}

.pill-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.pill-btn.active {
  background: #374151;
  color: #fff;
}

.table-responsive {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow-x: auto;
  margin-bottom: 30px;
}

.rpc-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.rpc-table th {
  background: #0f172a;
  color: var(--text-muted);
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.rpc-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(31, 41, 55, 0.7);
  white-space: nowrap;
  vertical-align: middle;
}

.rpc-table tr:hover {
  background: var(--bg-card-hover);
}

.rank-badge {
  font-size: 11px;
  font-weight: 800;
  font-family: var(--font-mono);
  width: 24px;
  height: 24px;
  background: #1f2937;
  color: #fff;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.rank-badge.top {
  background: #14F195;
  color: #000;
}

.provider-cell {
  font-weight: 700;
  color: #fff;
}

.url-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #94a3b8;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.latency-pill {
  font-size: 12px;
  font-weight: 800;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 6px;
  display: inline-block;
}

.latency-pill.fast {
  background: rgba(20, 241, 149, 0.18);
  color: #14F195;
  border: 1px solid rgba(20, 241, 149, 0.35);
}

.latency-pill.medium {
  background: rgba(245, 158, 11, 0.18);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.latency-pill.slow {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.latency-pill.testing {
  background: rgba(107, 114, 128, 0.2);
  color: #9ca3af;
}

.slot-mono {
  font-family: var(--font-mono);
  color: #cbd5e1;
}

.status-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

.status-tag.ok {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.status-tag.err {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.btn-copy-url {
  background: #1f2937;
  border: 1px solid #374151;
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-copy-url:hover {
  background: #374151;
  border-color: #14F195;
  color: #14F195;
}

/* FAQ */
.faq-section {
  margin-bottom: 30px;
}

.faq-section h3 {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px 18px;
}

.faq-card h4 {
  font-size: 13.5px;
  font-weight: 700;
  color: #14F195;
  margin-bottom: 6px;
}

.faq-card p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Portal Backlink Wrap */
.portal-backlink-wrap {
  text-align: center;
  padding: 10px 0;
  font-size: 12px;
  color: var(--text-dim);
}

.portal-backlink {
  color: var(--solana-green);
  text-decoration: none;
  font-weight: 700;
  margin-right: 6px;
}

.portal-backlink:hover {
  text-decoration: underline;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #14F195;
  color: #000;
  font-weight: 700;
  font-size: 13px;
  padding: 10px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  transition: transform 0.25s ease;
  z-index: 9999;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-right {
    width: 100%;
    justify-content: space-between;
  }
  .controls-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-ping-all {
    width: 100%;
    justify-content: center;
  }
  .recommend-url-row {
    flex-direction: column;
  }
  .btn-copy-best {
    width: 100%;
    justify-content: center;
  }
}