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

:root {
  --bg-primary: #030712;
  --bg-secondary: #0f1729;
  --bg-card: #111827;
  --bg-card-hover: #1a2540;
  --border: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #f97316;
  --accent-hover: #ea580c;
  --positive: #06b6d4;
  --positive-bg: rgba(6, 182, 212, 0.1);
  --neutral: #a78bfa;
  --neutral-bg: rgba(167, 139, 250, 0.1);
  --negative: #ef4444;
  --negative-bg: rgba(239, 68, 68, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ===== HERO ===== */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border-bottom: 1px solid var(--border);
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(249, 115, 22, 0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.hero h1 .accent { color: var(--accent); }

.tagline {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 32px;
}

.brand-input-group {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 0 auto;
}

.brand-input-group input {
  flex: 1;
  padding: 14px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.brand-input-group input:focus { border-color: var(--accent); }
.brand-input-group input::placeholder { color: var(--text-muted); }

.brand-input-group button {
  padding: 14px 28px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}

.brand-input-group button:hover { background: var(--accent-hover); }
.brand-input-group button:active { transform: scale(0.97); }
.brand-input-group button:disabled { opacity: 0.6; cursor: not-allowed; }

.spinner {
  width: 18px;
  height: 18px;
  display: inline-block;
  vertical-align: middle;
  animation: spin 1s linear infinite;
  margin-right: 6px;
}

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

/* ===== SUMMARY CARDS ===== */
.summary-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.summary-card.positive { border-color: rgba(6, 182, 212, 0.3); }
.summary-card.neutral { border-color: rgba(167, 139, 250, 0.3); }
.summary-card.negative { border-color: rgba(239, 68, 68, 0.3); }

.summary-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.summary-value {
  font-size: 1.8rem;
  font-weight: 700;
}

.summary-card.positive .summary-value { color: var(--positive); }
.summary-card.neutral .summary-value { color: var(--neutral); }
.summary-card.negative .summary-value { color: var(--negative); }

/* ===== CHARTS ===== */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 20px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.chart-card h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.chart-container { position: relative; }
.pie-container { max-width: 260px; margin: 0 auto; }
.line-container { height: 260px; }

/* ===== INSIGHTS ===== */
.insights-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.insight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.insight-card h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
}

.tag-topic {
  background: rgba(249, 115, 22, 0.12);
  color: var(--accent);
}

.tag-competitor {
  background: rgba(167, 139, 250, 0.12);
  color: var(--neutral);
}

/* ===== FILTERS ===== */
.filters-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.filters-row h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

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

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.filter-group select {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
}

.filter-group select:focus { border-color: var(--accent); }

.btn-secondary {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s;
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ===== MENTION FEED ===== */
.mention-feed {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 48px;
}

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

.mention-card:hover {
  border-color: var(--text-muted);
  background: var(--bg-card-hover);
}

.mention-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.source-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.source-icon.reddit { background: #ff4500; color: #fff; }
.source-icon.hackernews { background: #ff6600; color: #fff; }
.source-icon.twitter { background: #1da1f2; color: #fff; }
.source-icon.forum { background: #7c3aed; color: #fff; }
.source-icon.blog { background: #10b981; color: #fff; }

.mention-source {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.mention-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.mention-author {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: auto;
}

.mention-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mention-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

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

.sentiment-badge {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sentiment-badge.positive { background: var(--positive-bg); color: var(--positive); }
.sentiment-badge.neutral { background: var(--neutral-bg); color: var(--neutral); }
.sentiment-badge.negative { background: var(--negative-bg); color: var(--negative); }

.engagement-stats {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.engagement-stats span { display: flex; align-items: center; gap: 4px; }

.mention-link {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
}

.mention-link:hover { text-decoration: underline; }

/* ===== HISTORY ===== */
.history-section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.history-section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

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

.history-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.history-card:hover { border-color: var(--accent); }

.history-brand {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.history-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.history-sentiment {
  display: flex;
  gap: 12px;
  font-size: 0.85rem;
}

.history-sentiment span { font-weight: 600; }
.history-sentiment .pos { color: var(--positive); }
.history-sentiment .neu { color: var(--neutral); }
.history-sentiment .neg { color: var(--negative); }

.empty-state {
  color: var(--text-muted);
  font-style: italic;
  grid-column: 1 / -1;
  text-align: center;
  padding: 32px;
}

/* ===== SUBSCRIBE ===== */
.signup-section {
  padding: 60px 0;
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.signup-section h2 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.signup-section p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.subscribe-group {
  display: flex;
  gap: 12px;
  max-width: 420px;
  margin: 0 auto;
}

.subscribe-group input {
  flex: 1;
  padding: 12px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
}

.subscribe-group input:focus { border-color: var(--accent); }

.subscribe-group button {
  padding: 12px 24px;
  border-radius: var(--radius);
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.subscribe-group button:hover { background: var(--accent-hover); }

.subscribe-msg {
  margin-top: 12px;
  font-size: 0.9rem;
}

.subscribe-msg.success { color: var(--positive); }
.subscribe-msg.error { color: var(--negative); }

/* ===== FOOTER ===== */
.footer {
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .brand-input-group { flex-direction: column; }
  .summary-row { grid-template-columns: repeat(2, 1fr); }
  .summary-row .summary-card:first-child { grid-column: 1 / -1; }
  .charts-row { grid-template-columns: 1fr; }
  .insights-row { grid-template-columns: 1fr; }
  .filters-row { flex-direction: column; align-items: flex-start; }
  .filter-controls { flex-wrap: wrap; }
  .mention-header { flex-wrap: wrap; }
  .mention-author { margin-left: 0; }
}

@media (max-width: 480px) {
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 1.8rem; }
  .tagline { font-size: 1rem; }
  .subscribe-group { flex-direction: column; }
}