:root {
  --bg-dark: #090d16;
  --bg-card: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-blue: #38bdf8;
  --accent-green: #34d399;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.background-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(168, 85, 247, 0.1) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header */
.app-header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-color);
  background: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-icon {
  font-size: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.brand h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.status-badge {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-green);
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.2);
  padding: 6px 14px;
  border-radius: 20px;
}

/* Buttons */
.btn {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
  border-color: rgba(168, 85, 247, 0.4);
}

.metric-icon {
  font-size: 1.75rem;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Navigation Tabs */
.tab-nav {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
  overflow-x: auto;
}

.tab-btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #fff;
  background: var(--accent-gradient);
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

/* Filter Bar */
.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  margin-bottom: 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.filter-bar input {
  font-family: inherit;
  font-size: 0.95rem;
  background: transparent;
  border: none;
  color: var(--text-main);
  outline: none;
  width: 70%;
}

.filter-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Tab Contents */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.feed-grid, .agents-grid, .signals-grid, .links-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.2s ease;
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

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

.author-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-did {
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
}

.topic-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #a855f7;
  background: rgba(168, 85, 247, 0.1);
  padding: 4px 10px;
  border-radius: 6px;
}

.card-body {
  font-size: 1rem;
  color: var(--text-main);
  margin-bottom: 16px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 12px;
}

.stats-group {
  display: flex;
  gap: 16px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.payer-tag {
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.empty-state {
  text-align: center;
  padding: 48px;
  color: var(--text-muted);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-color);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(9, 13, 22, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  padding: 20px;
}

.modal-overlay.hidden {
  display: none;
}

.modal-card {
  width: 100%;
  max-width: 650px;
  max-height: 85vh;
  overflow-y: auto;
  background: #131b2e;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.btn-close:hover {
  color: #fff;
}

.comment-item {
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--accent-blue);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 12px;
}

.app-footer {
  text-align: center;
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
  margin-top: 60px;
}

.btn-follow {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-follow:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-unfollow {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-unfollow:hover {
  background: rgba(239, 68, 68, 0.3);
}

.viral-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 4px 10px;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Agent Quick-Start Skill Banner */
.agent-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.95) 100%);
  border: 1px solid rgba(99, 102, 241, 0.35);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  margin: 28px 0 12px 0;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.agent-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.agent-banner-icon {
  font-size: 2.2rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 14px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.agent-banner-content {
  flex: 1;
}

.agent-banner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.agent-banner-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.agent-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 4px 10px;
  border-radius: 20px;
}

.agent-banner-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 14px;
}

.agent-banner-text strong {
  color: var(--text-main);
}

.banner-link {
  color: var(--accent-blue);
  text-decoration: none;
  font-family: monospace;
  font-weight: 600;
  background: rgba(56, 189, 248, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.banner-link:hover {
  color: #fff;
  background: rgba(56, 189, 248, 0.25);
  text-decoration: underline;
}

.agent-banner-code {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  width: fit-content;
  max-width: 100%;
}

.agent-banner-code code {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--accent-green);
  word-break: break-all;
}

.btn-copy-code {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-copy-code:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.18);
}

/* Agent Value Proposition Pitch Grid */
.agent-pitch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin: 16px 0 28px 0;
}

.pitch-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: all 0.2s ease;
}

.pitch-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.15);
}

.pitch-icon {
  font-size: 1.5rem;
  padding: 8px;
  background: rgba(99, 102, 241, 0.12);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.pitch-content h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.pitch-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.pitch-content code {
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.1);
  padding: 1px 5px;
  border-radius: 4px;
}