/* ============================================================
   HeatCheck — Trend Radar Dashboard
   Dark, minimal, streetwear-coded. No generic SaaS patterns.
   ============================================================ */

/* ─── NAV ─────────────────────────────────────────────────── */
.radar-body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
}

.radar-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px var(--gutter);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--fg);
  text-decoration: none;
}

.brand-accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link--active {
  color: var(--fg);
}

.nav-link--active {
  position: relative;
}

.nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
}

/* ─── HEADER ──────────────────────────────────────────────── */
.radar-header {
  padding: 120px var(--gutter) 56px;
  background: var(--bg-elevated);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  position: relative;
  overflow: hidden;
}

.radar-header::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  filter: blur(60px);
  pointer-events: none;
}

.radar-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.radar-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.radar-label::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.radar-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #bbb 50%, var(--accent-soft) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.radar-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 480px;
  line-height: 1.7;
}

/* Stats row */
.radar-stats {
  max-width: var(--max-w);
  margin: 48px auto 0;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.rstat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rstat-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.rstat-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  text-transform: uppercase;
}

.rstat-div {
  width: 1px;
  height: 36px;
  background: var(--fg-dim);
  opacity: 0.2;
}

/* ─── FILTER BAR ──────────────────────────────────────────── */
.filter-bar {
  position: sticky;
  top: 61px;
  z-index: 50;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 16px var(--gutter);
}

.filter-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
  text-transform: uppercase;
  margin-right: 4px;
}

.filter-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
}

.filter-btn:hover {
  border-color: rgba(255, 59, 0, 0.3);
  color: var(--fg);
}

.filter-btn--active {
  background: var(--accent-glow);
  border-color: rgba(255, 59, 0, 0.4);
  color: var(--accent-soft);
}

.filter-sort {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sort-select {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 6px 12px;
  cursor: pointer;
  appearance: none;
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23555' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.sort-select:focus { outline: none; border-color: rgba(255, 59, 0, 0.3); }

/* ─── MAIN GRID ───────────────────────────────────────────── */
.radar-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px var(--gutter) 80px;
}

.trends-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

/* Skeleton loader */
.trend-skeleton {
  background: var(--bg-card);
  height: 280px;
  animation: shimmer 1.4s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.3; }
}

/* ─── TREND CARD ──────────────────────────────────────────── */
.trend-card {
  background: var(--bg-card);
  padding: 32px 28px;
  cursor: pointer;
  transition: background 0.25s ease, transform 0.2s ease;
  position: relative;
  border-bottom: 2px solid transparent;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.trend-card:hover {
  background: #1c1c1c;
  transform: translateY(-2px);
}

.trend-card--rising { border-bottom-color: var(--green); }
.trend-card--peaking { border-bottom-color: var(--accent); }
.trend-card--fading { border-bottom-color: var(--fg-dim); }
.trend-card--stable { border-bottom-color: rgba(255,255,255,0.1); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.card-category {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  padding: 3px 8px;
  border: 1px solid rgba(255,255,255,0.07);
  white-space: nowrap;
}

.card-momentum {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.card-momentum--rising { color: var(--green); }
.card-momentum--peaking { color: var(--accent-soft); }
.card-momentum--fading { color: var(--fg-dim); }
.card-momentum--stable { color: var(--fg-muted); }

.card-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.2;
  color: var(--fg);
}

.card-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Confidence bar */
.card-metrics {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.metric-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.metric-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-dim);
  width: 80px;
  flex-shrink: 0;
}

.metric-bar {
  flex: 1;
  height: 3px;
  background: rgba(255,255,255,0.07);
  position: relative;
  overflow: hidden;
}

.metric-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 2px;
  transition: width 0.6s ease;
}

.metric-fill--confidence { background: var(--fg-muted); }
.metric-fill--velocity-pos { background: var(--green); }
.metric-fill--velocity-neg { background: var(--accent); }

.metric-val {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--fg);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

/* Sparkline canvas */
.card-sparkline {
  width: 100%;
  height: 40px;
  display: block;
}

/* Platforms */
.card-platforms {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.platform-chip {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 7px;
  background: rgba(255,255,255,0.04);
  color: var(--fg-dim);
  border: 1px solid rgba(255,255,255,0.06);
}

/* Drop window */
.card-window {
  font-size: 0.75rem;
  color: var(--accent-soft);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-top: auto;
}

/* ─── DETAIL PANEL ────────────────────────────────────────── */
.detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
}

.detail-overlay.is-open {
  pointer-events: all;
}

.detail-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.detail-overlay.is-open::before {
  opacity: 1;
}

.detail-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 480px;
  max-width: 90vw;
  background: var(--bg-card);
  border-left: 1px solid rgba(255,255,255,0.07);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.detail-overlay.is-open .detail-panel {
  transform: translateX(0);
}

.detail-close {
  position: sticky;
  top: 0;
  width: 100%;
  background: var(--bg-card);
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: var(--fg-muted);
  font-size: 0.9rem;
  padding: 18px 24px;
  text-align: right;
  cursor: pointer;
  z-index: 1;
  display: block;
  font-family: var(--font-body);
  transition: color 0.2s ease;
}

.detail-close:hover { color: var(--fg); }

.detail-body {
  padding: 32px 28px;
}

.detail-loading {
  color: var(--fg-dim);
  font-size: 0.9rem;
  padding: 40px 0;
  text-align: center;
}

.detail-category {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.detail-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--fg);
}

.detail-desc {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.detail-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.detail-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.dm-block {
  background: var(--bg-elevated);
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.05);
}

.dm-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 6px;
}

.dm-val {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.8rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.dm-val--green { color: var(--green); }
.dm-val--orange { color: var(--accent-soft); }
.dm-val--dim { color: var(--fg-dim); }

/* Signal chart */
.signal-chart-wrap {
  margin-bottom: 32px;
}

.signal-canvas {
  width: 100%;
  height: 100px;
  display: block;
}

/* Drop window block */
.detail-window {
  background: var(--red-dim);
  border: 1px solid rgba(255, 59, 0, 0.15);
  padding: 20px;
  margin-bottom: 32px;
}

.detail-window-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.detail-window-val {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
}

/* Tags */
.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.detail-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--fg-muted);
}

/* ─── EMPTY / ERROR STATES ────────────────────────────────── */
.state-empty {
  grid-column: 1 / -1;
  padding: 80px 40px;
  text-align: center;
}

.state-empty-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--fg-dim);
  margin-bottom: 8px;
}

.state-empty-sub {
  font-size: 0.9rem;
  color: var(--fg-dim);
  opacity: 0.6;
}

/* ─── MOBILE ──────────────────────────────────────────────── */
@media (max-width: 960px) {
  .trends-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .radar-header {
    padding: 100px var(--gutter) 40px;
  }

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

  .detail-panel {
    width: 100%;
  }

  .filter-sort {
    margin-left: 0;
    width: 100%;
  }

  .detail-metrics {
    grid-template-columns: 1fr;
  }
}