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

:root {
  --bg:         #0d0d0d;
  --surface:    #161616;
  --border:     #2a2a2a;
  --gold:       #c9a84c;
  --gold-light: #e8cc80;
  --text:       #f0ece4;
  --muted:      #6b6560;
  --success:    #4caf7d;
  --error:      #e05c5c;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background glow effect */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(201,168,76,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(201,168,76,0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Header ─────────────────────────────────────────────────────── */
header {
  position: relative;
  z-index: 1;
  padding: 60px 40px 40px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.brand { display: flex; flex-direction: column; gap: 6px; }

.brand-tag {
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
}

.brand-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  line-height: 1;
  color: var(--text);
}

.brand-title span { color: var(--gold); }

.brand-sub {
  font-size: 13px;
  color: var(--muted);
  font-weight: 300;
  margin-top: 4px;
}

/* ── API Status ──────────────────────────────────────────────────── */
.api-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s;
}

.status-dot.online  { background: var(--success); box-shadow: 0 0 8px var(--success); }
.status-dot.offline { background: var(--error); }

/* ── Main Layout ─────────────────────────────────────────────────── */
main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 180px);
}

/* ── Form Panel ──────────────────────────────────────────────────── */
.form-panel {
  padding: 60px 40px;
  border-right: 1px solid var(--border);
}

.panel-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.form-group {
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.5s forwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }
.form-group:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

label {
  display: block;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 500;
}

input, select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  padding: 14px 16px;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

input:focus, select:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.1);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6560' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

select option {
  background: var(--surface);
  color: var(--text);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ── Predict Button ───────────────────────────────────────────────── */
.btn-predict {
  width: 100%;
  padding: 16px;
  background: var(--gold);
  color: #0d0d0d;
  border: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, transform 0.1s;
  position: relative;
  overflow: hidden;
}

.btn-predict:hover  { background: var(--gold-light); }
.btn-predict:active { transform: scale(0.99); }

.btn-predict.loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn-predict.loading::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 1s infinite;
}

@keyframes shimmer {
  to { left: 100%; }
}

/* ── Result Panel ────────────────────────────────────────────────── */
.result-panel {
  padding: 60px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.result-empty {
  text-align: center;
  opacity: 0.3;
}

.result-empty svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
}

.result-empty p {
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.8;
}

/* ── Result Card ─────────────────────────────────────────────────── */
.result-card {
  width: 100%;
  max-width: 380px;
  display: none;
}

.result-card.visible {
  display: block;
  animation: fadeUp 0.4s forwards;
}

.result-location {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 8px;
}

.result-price {
  font-family: 'Playfair Display', serif;
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1;
  color: var(--text);
  margin-bottom: 4px;
}

.result-price-label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 40px;
}

.result-divider {
  height: 1px;
  background: var(--border);
  margin-bottom: 32px;
}

.result-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.detail-label {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
}

.detail-value {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}

/* ── Error Card ──────────────────────────────────────────────────── */
.result-error {
  width: 100%;
  max-width: 380px;
  display: none;
  background: rgba(224, 92, 92, 0.08);
  border: 1px solid rgba(224, 92, 92, 0.2);
  border-radius: 4px;
  padding: 20px;
}

.result-error.visible {
  display: block;
  animation: fadeUp 0.3s forwards;
}

.result-error p {
  font-size: 13px;
  color: var(--error);
  line-height: 1.6;
}

/* ── Footer ──────────────────────────────────────────────────────── */
footer {
  position: relative;
  z-index: 1;
  padding: 24px 40px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

footer p {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 1px;
}

.api-url {
  font-size: 11px;
  color: var(--muted);
  font-family: monospace;
  background: var(--surface);
  padding: 6px 12px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  main                { grid-template-columns: 1fr; }
  .form-panel         { border-right: none; border-bottom: 1px solid var(--border); padding: 40px 24px; }
  .result-panel       { padding: 40px 24px; }
  header              { padding: 40px 24px 24px; }
  footer              { padding: 20px 24px; }
  .input-row          { grid-template-columns: 1fr; }
}