@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --ink: #14130F;
  --surface: #1C1B16;
  --surface-elevated: #24221C;
  --hairline: rgba(242, 239, 230, 0.12);
  --hairline-hover: rgba(242, 239, 230, 0.24);
  --text: #F2EFE6;
  --muted: #9A968B;
  --accent-cyan: #06b6d4;
  --accent-sky: #38bdf8;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

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

body {
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-display);
  line-height: 1.5;
  min-height: 100vh;
  padding: 24px 16px 64px;
  background-image:
    linear-gradient(var(--hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 32px 32px;
}

.container {
  max-width: 980px;
  margin: 0 auto;
}

/* Header */
header {
  margin-bottom: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.badge-mini {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  background: var(--surface-elevated);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--hairline);
}

h1 {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--muted);
  font-size: 1rem;
  max-width: 780px;
}

/* Layout */
.calculator-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (max-width: 860px) {
  .calculator-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 24px;
}

.results-card {
  background-color: var(--surface);
  border: 1px solid rgba(6, 182, 212, 0.35);
  border-radius: 14px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Sliders */
.slider-group {
  margin-bottom: 18px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.slider-header label {
  color: var(--text);
  font-weight: 500;
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-cyan);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: var(--surface-elevated);
  outline: none;
  cursor: pointer;
  border: 1px solid var(--hairline);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
  cursor: pointer;
  border: 2px solid var(--ink);
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.divider {
  height: 1px;
  background: var(--hairline);
  margin: 20px 0;
}

/* Grids */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 16px;
}

.grid-3col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

@media (max-width: 600px) {
  .grid-2col, .grid-3col {
    grid-template-columns: 1fr;
  }
}

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

.form-group label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

select, input[type="number"] {
  background-color: var(--surface-elevated);
  border: 1px solid var(--hairline);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 10px 12px;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s ease;
}

select:focus, input[type="number"]:focus {
  border-color: var(--accent-cyan);
}

/* 3D Canvas Box */
.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 220px;
  background: #0f1013;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  overflow: hidden;
  margin-bottom: 18px;
}

#roomCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.view-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  background: rgba(20, 19, 15, 0.8);
  backdrop-filter: blur(4px);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 3px 8px;
  border-radius: 4px;
}

.room-dims-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(20, 19, 15, 0.8);
  backdrop-filter: blur(4px);
  color: var(--text);
  border: 1px solid var(--hairline);
  padding: 3px 8px;
  border-radius: 4px;
  font-variant-numeric: tabular-nums;
}

/* Big Result */
.highlight-box {
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  margin-bottom: 14px;
}

.highlight-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 4px;
}

.highlight-value {
  font-family: var(--font-mono);
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--accent-cyan);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.highlight-subtext {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 6px;
}

.recommended-badge {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  font-size: 0.88rem;
  padding: 10px 14px;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 16px;
}

.breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  margin-bottom: 20px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--hairline);
}

.breakdown-label {
  color: var(--muted);
}

.breakdown-val {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.cyan-color { color: var(--accent-cyan); }
.green-color { color: var(--accent-green); }

/* Print button */
.btn-print {
  margin-top: auto;
  width: 100%;
  background: var(--surface-elevated);
  border: 1px solid var(--hairline);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-print:hover {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Sections */
.section-card {
  background-color: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.section-desc {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th {
  text-align: left;
  padding: 10px 12px;
  background-color: var(--surface-elevated);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--hairline);
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--hairline);
}

tr:last-child td {
  border-bottom: none;
}

.highlight-row {
  background: rgba(6, 182, 212, 0.08);
}

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.tip-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 18px;
}

.tip-icon {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.tip-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 6px;
}

.tip-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.45;
}

/* Related tools */
.related-tools-section {
  margin-bottom: 32px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.related-card {
  background-color: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 16px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s ease;
  display: block;
}

.related-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.related-emoji {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.related-name {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.related-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}

/* FAQ */
.faq-section {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 32px;
}

.faq-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.faq-item {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hairline);
}

.faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-q {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.faq-a {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Footer */
footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.15s;
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-contact {
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-contact a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.footer-contact a:hover {
  text-decoration: underline;
}

/* Print styles */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    padding: 0;
  }

  .badge, .slider-group input, select, input[type="number"], .btn-print, footer, .related-tools-section {
    display: none !important;
  }

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

  .card, .results-card, .section-card, .faq-section {
    background: #ffffff !important;
    border: 1px solid #ccc !important;
    color: #000000 !important;
  }

  .highlight-value {
    color: #0284c7 !important;
  }
}