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

:root {
  --gold: #C9A227;
  --gold-light: #E4C76B;
  --gold-dim: #8A7020;
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-raised: #1a1a1a;
  --surface-strong: #222222;
  --border: #2a2a2a;
  --border-hover: #3a3a3a;
  --text-primary: #f0f0f0;
  --text-secondary: #888888;
  --text-tertiary: #555555;
  --text-quaternary: #333333;
  --danger: #e74c3c;
  --positive: #2ecc71;
  --warning: #f39c12;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", Consolas, monospace;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --transition: 0.15s ease-out;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

button, input, select, textarea { font: inherit; color: inherit; }

/* ── Utilities ── */
.hidden { display: none !important; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: inherit;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-name {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-primary);
}
.brand-tagline {
  font-size: 12px;
  color: var(--text-tertiary);
}
.main-nav {
  display: flex;
  gap: var(--space-xs);
}
.nav-link {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
  position: relative;
}
.nav-link:hover { color: var(--text-primary); background: var(--surface-raised); }
.nav-link.active { color: var(--gold); }
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: var(--gold);
  color: var(--bg);
  font-size: 11px;
  font-weight: 600;
  margin-left: 4px;
}

/* ── Demo Banner ── */
.demo-banner {
  background: color-mix(in srgb, var(--warning) 12%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--warning) 20%, transparent);
}
.demo-banner-inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  font-size: 13px;
  color: var(--warning);
}
.demo-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
  flex-shrink: 0;
}
.demo-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--warning);
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

/* ── Search Section ── */
.search-section { padding: var(--space-2xl) 0; }
.search-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.search-row {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.search-input-wrap {
  flex: 1;
  position: relative;
}
.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}
.search-input {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 16px;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-input:focus {
  border-color: var(--gold-dim);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--gold) 10%, transparent);
}
.search-input::placeholder { color: var(--text-tertiary); }
.search-suggestions {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  max-height: 240px;
  overflow-y: auto;
  z-index: 50;
  display: none;
}
.search-suggestions.active { display: block; }
.suggestion-item {
  padding: 10px 14px;
  font-size: 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.suggestion-item:last-child { border-bottom: none; }
.suggestion-item:hover { background: var(--surface-strong); }
.suggestion-item .sug-main { color: var(--text-primary); }
.suggestion-item .sug-sub { color: var(--text-tertiary); font-size: 12px; }

.search-select {
  padding: 12px 32px 12px 14px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23555' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}
.search-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--gold);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.search-btn:hover { background: var(--gold-light); }
.search-btn:active { transform: scale(0.98); }
.search-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Filters ── */
.filters-row {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.filter-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 130px;
  flex: 1;
}
.filter-label {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 500;
}
.filter-select {
  padding: 8px 28px 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23555' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
.filter-select:focus { border-color: var(--gold-dim); }

/* ── Stats Bar ── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-value {
  font-size: 22px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}
.stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: lowercase;
}

/* ── Results ── */
.results-meta {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-lg);
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}
.results-empty {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}
.empty-icon {
  color: var(--text-quaternary);
  margin-bottom: var(--space-md);
}
.empty-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.empty-desc {
  font-size: 14px;
  color: var(--text-tertiary);
  max-width: 400px;
  margin: 0 auto var(--space-lg);
}

/* ── Property Card ── */
.prop-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.prop-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.prop-card.selected {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), var(--shadow-sm);
}
.prop-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
}
.prop-title {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.3;
}
.prop-addr {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 2px;
}
.prop-dist {
  font-size: 12px;
  color: var(--gold);
  font-weight: 500;
  white-space: nowrap;
  background: color-mix(in srgb, var(--gold) 10%, transparent);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}
.prop-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.tag {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.tag.tenure-freehold {
  background: color-mix(in srgb, var(--positive) 10%, transparent);
  color: var(--positive);
  border-color: color-mix(in srgb, var(--positive) 20%, transparent);
}
.tag.tenure-lease99 {
  background: color-mix(in srgb, var(--warning) 10%, transparent);
  color: var(--warning);
  border-color: color-mix(in srgb, var(--warning) 20%, transparent);
}
.tag.type-new {
  background: color-mix(in srgb, var(--gold) 10%, transparent);
  color: var(--gold);
  border-color: color-mix(in srgb, var(--gold) 20%, transparent);
}

.prop-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}
.metric { display: flex; flex-direction: column; gap: 2px; }
.metric-label { font-size: 11px; color: var(--text-tertiary); }
.metric-value { font-size: 15px; font-weight: 500; font-variant-numeric: tabular-nums; }
.metric-value.psf { color: var(--gold); }
.metric-value.yoy-positive { color: var(--positive); }
.metric-value.yoy-negative { color: var(--danger); }

.prop-actions {
  display: flex;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-sm:hover { border-color: var(--border-hover); color: var(--text-primary); background: var(--surface-strong); }
.btn-sm.active { background: var(--gold); color: var(--bg); border-color: var(--gold); font-weight: 500; }
.btn-sm.active:hover { background: var(--gold-light); }

/* ── Compare ── */
.view-section { padding: var(--space-2xl) 0; }
.section-header { margin-bottom: var(--space-xl); }
.section-title { font-size: 24px; font-weight: 500; margin-bottom: 4px; }
.section-subtitle { font-size: 14px; color: var(--text-tertiary); }

.compare-empty-state,
.trends-empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  margin-top: var(--space-md);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

.compare-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 600px;
}
.compare-table th,
.compare-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.compare-table th {
  background: var(--surface-raised);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: lowercase;
  position: sticky;
  top: 0;
}
.compare-table td {
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}
.compare-table tr:hover td { background: var(--surface-raised); }
.compare-table td.highlight { color: var(--text-primary); font-weight: 500; }
.compare-table td.best { color: var(--positive); font-weight: 500; }
.compare-table td.worst { color: var(--danger); font-weight: 500; }
.compare-table .remove-btn {
  opacity: 0;
  transition: opacity var(--transition);
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 12px;
}
.compare-table tr:hover .remove-btn { opacity: 1; }

/* ── Trends ── */
.trends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}
.trend-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: border-color var(--transition);
}
.trend-card:hover { border-color: var(--border-hover); }
.trend-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}
.trend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.trend-name { font-size: 14px; font-weight: 500; }
.trend-psf {
  font-size: 28px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
}
.trend-change {
  font-size: 13px;
}
.trend-change.up { color: var(--positive); }
.trend-change.down { color: var(--danger); }

/* ── About ── */
.about-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3xl);
  text-align: center;
}
.about-logo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin-bottom: var(--space-lg);
}
.about-title { font-size: 24px; font-weight: 500; margin-bottom: 4px; }
.about-tagline {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}
.about-body {
  text-align: left;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.about-body p { margin-bottom: var(--space-md); }
.about-body h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  margin: var(--space-xl) 0 var(--space-md);
}
.about-body ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}
.about-body li { margin-bottom: 6px; }
.about-footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-tertiary);
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

/* ── Compare Bar ── */
.compare-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  z-index: 90;
  padding: var(--space-md) 0;
}
.compare-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.compare-bar-text { font-size: 14px; color: var(--text-secondary); }
.compare-bar-actions { display: flex; gap: var(--space-md); }
.btn-ghost {
  padding: 8px 16px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.btn-ghost:hover { border-color: var(--text-tertiary); color: var(--text-primary); }
.btn-primary {
  padding: 8px 18px;
  background: var(--gold);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-primary:hover { background: var(--gold-light); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-md);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 16px; font-weight: 500; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition);
}
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: var(--space-xl); }

/* ── Loading ── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.8);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-size: 14px; color: var(--text-secondary); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .header-inner { height: 56px; }
  .brand-tagline { display: none; }
  .main-nav { gap: 0; }
  .nav-link { padding: 8px 10px; font-size: 13px; }
  .search-row { flex-wrap: wrap; }
  .search-input-wrap { width: 100%; }
  .search-select { flex: 1; }
  .search-btn { flex: 1; justify-content: center; }
  .filters-row { gap: var(--space-sm); }
  .filter-group { min-width: calc(50% - var(--space-sm)); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .results-grid { grid-template-columns: 1fr; }
  .compare-table-wrap { margin: 0 calc(-1 * var(--space-lg)); border-radius: 0; border-left: none; border-right: none; }
  .about-card { padding: var(--space-xl); }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .prop-metrics { grid-template-columns: repeat(2, 1fr); }
}