:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --surface-soft: #f8fafc;
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --text: #0f172a;
  --muted: #64748b;
  --accent: #1d4ed8;
  --accent-strong: #153ea7;
  --accent-soft: rgba(29, 78, 216, 0.1);
  --danger: #b42318;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --warning-soft: rgba(245, 158, 11, 0.12);
  --success-soft: rgba(15, 118, 110, 0.1);
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 24px 60px rgba(15, 23, 42, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1480px;
}

* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(29, 78, 216, 0.07), transparent 28%),
    linear-gradient(180deg, #f8fafc 0%, #f3f6fb 100%);
}
button, input, select { font: inherit; }

.page-shell { max-width: var(--max-width); margin: 0 auto; padding: 28px; }
.topbar {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 22px;
}
.brand-block { max-width: 820px; }
.eyebrow, .section-kicker, .card-label {
  margin: 0 0 8px; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}
h1, h2, h3, h4, p, ul { margin: 0; }
h1 { font-size: clamp(2rem, 3.2vw, 3rem); line-height: 1.02; letter-spacing: -0.04em; }
h2 { font-size: 1.35rem; line-height: 1.2; letter-spacing: -0.03em; }
h3 { font-size: 1.08rem; letter-spacing: -0.02em; }
h4 { font-size: 1rem; }
.lead { margin-top: 12px; max-width: 720px; color: var(--muted); line-height: 1.65; }
.topbar-actions, .room-actions, .wizard-buttons, .inline-tools { display: flex; gap: 12px; }

.hero-strip {
  display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 16px; margin-bottom: 20px;
}
.hero-card, .panel, .result-block, .metric-card, .soft-card, .lot-item, .room-row, .counter-chip {
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-sm); backdrop-filter: blur(16px); border-radius: var(--radius-md);
}
.hero-card { padding: 22px; }
.hero-card-strong { background: linear-gradient(135deg, rgba(255,255,255,0.96), rgba(244,248,255,0.96)); box-shadow: var(--shadow-md); }
.hero-card p, .hero-list, .hint, .metric-label, .empty-state, .list-row small, .field-help, .quote-note { color: var(--muted); }
.hero-card p, .field-help, .quote-note { margin-top: 10px; line-height: 1.6; }
.hero-list { padding-left: 18px; line-height: 1.8; }

.workspace {
  display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(360px, 0.8fr); gap: 20px; align-items: start;
}
.sticky-panel { position: sticky; top: 20px; }
.panel { padding: 22px; margin-bottom: 18px; }
.panel-header { margin-bottom: 18px; }
.panel-header-split, .wizard-topline { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.field-wide { grid-column: 1 / -1; }
.aligned-grid { align-items: end; }

label { display: flex; flex-direction: column; gap: 8px; }
label span { font-size: 0.9rem; font-weight: 600; color: #334155; }
input, select {
  width: 100%; min-height: 46px; padding: 11px 14px; border: 1px solid var(--border); border-radius: 12px; background: rgba(255, 255, 255, 0.96); color: var(--text);
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}
input:hover, select:hover { border-color: var(--border-strong); }
input:focus, select:focus {
  outline: none; border-color: rgba(29, 78, 216, 0.34); box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.08);
}
input.invalid, select.invalid {
  border-color: rgba(220, 38, 38, 0.45); box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.08);
}
.toggle-card {
  display: flex; flex-direction: row; align-items: center; justify-content: space-between; gap: 12px; min-height: 46px; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: 14px; background: var(--surface-soft);
}
.toggle-card input { width: auto; min-height: auto; padding: 0; box-shadow: none; }

.btn {
  appearance: none; border: 1px solid transparent; border-radius: 12px; padding: 11px 15px; cursor: pointer; font-weight: 600; letter-spacing: -0.01em;
  transition: transform 0.14s ease, box-shadow 0.14s ease, background 0.14s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(180deg, var(--accent), var(--accent-strong)); color: #fff; box-shadow: 0 10px 24px rgba(29, 78, 216, 0.22); }
.btn-secondary { background: rgba(255, 255, 255, 0.92); border-color: var(--border); color: var(--text); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--danger); }
.btn-sm { padding: 9px 12px; font-size: 0.88rem; }
.btn-icon { padding-inline: 12px; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; transform: none; }

.wizard-header { margin-bottom: 18px; }
.step-status { font-size: 0.9rem; font-weight: 600; color: var(--muted); }
.progress-bar { width: 100%; height: 8px; margin-top: 16px; border-radius: 999px; background: rgba(15, 23, 42, 0.06); overflow: hidden; }
.progress-bar span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), #4f83ff); transition: width 0.18s ease; }
.steps-nav { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px; margin-top: 18px; }
.step-chip {
  display: flex; align-items: center; justify-content: center; min-height: 42px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 12px;
  background: rgba(255, 255, 255, 0.75); color: var(--muted); font-size: 0.86rem; font-weight: 600;
}
.step-chip.is-current { border-color: rgba(29, 78, 216, 0.28); background: var(--accent-soft); color: var(--accent); }
.step-chip.is-complete { color: #0f766e; background: var(--success-soft); }
.wizard-actions { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.wizard-feedback { min-height: 24px; color: var(--danger); font-size: 0.92rem; font-weight: 500; }

.counter-row {
  display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px;
}
.counter-chip {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 999px;
}
.counter-chip strong { font-size: 0.95rem; }
.counter-chip span { color: var(--muted); font-size: 0.88rem; }

.rooms-table {
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden; background: rgba(255,255,255,0.7);
}
.rooms-head, .room-row-grid {
  display: grid; grid-template-columns: 1.05fr 1.2fr 0.7fr auto; gap: 12px; align-items: center;
}
.rooms-head {
  padding: 12px 14px; background: rgba(15, 23, 42, 0.03); color: var(--muted); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
}
.compact-stack { gap: 0; }
.room-row {
  padding: 10px 14px; border: 0; border-bottom: 1px solid rgba(15, 23, 42, 0.06); border-radius: 0; box-shadow: none; background: transparent;
}
.room-row:last-child { border-bottom: 0; }
.room-row label { gap: 0; }
.surface-input-wrap { position: relative; }
.surface-input-wrap span {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 0.82rem; pointer-events: none;
}
.surface-input-wrap input { padding-right: 42px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.lots-list { display: grid; gap: 10px; margin-top: 16px; }
.lot-item {
  display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 12px 14px; background: rgba(248,250,252,0.92);
}
.lot-item input[type="checkbox"] { width: 18px; height: 18px; min-height: 18px; }
.lot-copy strong { display: block; }
.lot-copy small { display: block; margin-top: 2px; color: var(--muted); }
.lot-inline-field { width: 110px; }
.lot-inline-field input { min-height: 40px; padding-block: 8px; }

.double-panels { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.soft-card { padding: 18px; }
.soft-card h4 { margin-bottom: 14px; }

.result-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.metric-card { padding: 18px; }
.metric-label { display: block; }
.metric-value {
  display: block; margin-top: 8px; font-size: 1.52rem; font-weight: 700; letter-spacing: -0.03em;
}
.metric-value.small { font-size: 1.02rem; line-height: 1.4; }
.results-panel { box-shadow: var(--shadow-md); }
.result-stack { display: grid; gap: 12px; margin-top: 12px; }
.result-block { padding: 18px; }
.result-block h4 { margin-bottom: 8px; }
.list-row {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; padding: 14px 0; border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}
.list-row:last-child { border-bottom: none; }
.list-row strong, .list-row span { display: block; }
.list-row small { display: block; margin-top: 4px; line-height: 1.45; }
.badge {
  display: inline-flex; align-items: center; justify-content: center; min-height: 32px; padding: 0 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 0.85rem; font-weight: 700;
}
.badge.warning { background: var(--warning-soft); color: #b45309; }
.badge.danger { background: var(--danger-soft); color: var(--danger); }

.quote-preview {
  border: 1px solid var(--border); border-radius: 16px; background: rgba(255,255,255,0.72); overflow: hidden;
}
.quote-header, .quote-row {
  display: grid; grid-template-columns: 1.2fr 0.6fr 0.5fr; gap: 12px; align-items: center;
}
.quote-header {
  padding: 12px 16px; background: rgba(15, 23, 42, 0.04); color: var(--muted); font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
}
.quote-row {
  padding: 12px 16px; border-top: 1px solid rgba(15, 23, 42, 0.06);
}
.quote-total {
  display: flex; justify-content: space-between; gap: 16px; padding: 16px; border-top: 1px solid rgba(15, 23, 42, 0.08); background: rgba(15, 23, 42, 0.02); font-weight: 700;
}
.quote-meta {
  padding: 16px; border-top: 1px solid rgba(15, 23, 42, 0.08);
}
.quote-meta p + p { margin-top: 6px; }

.hint, .empty-state { line-height: 1.6; }
.hidden { display: none !important; }
.no-print {}

@media (max-width: 1240px) {
  .hero-strip, .workspace, .double-panels, .grid-4, .grid-3 { grid-template-columns: 1fr 1fr; }
  .workspace { grid-template-columns: 1fr; }
  .sticky-panel { position: static; }
  .steps-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .page-shell { padding: 16px; }
  .topbar, .panel-header-split, .wizard-topline, .wizard-actions { flex-direction: column; align-items: stretch; }
  .topbar-actions, .wizard-buttons, .inline-tools { width: 100%; }
  .topbar-actions .btn, .wizard-buttons .btn, .inline-tools .btn { flex: 1; }
  .hero-strip, .double-panels, .grid-2, .grid-3, .grid-4, .result-grid, .steps-nav, .quote-header, .quote-row, .rooms-head, .room-row-grid { grid-template-columns: 1fr; }
  .rooms-head { display: none; }
}

@media print {
  body { background: #fff; }
  .page-shell { max-width: none; padding: 0; }
  .workspace { display: block; }
  .results-column, .form-step[data-step="5"], .panel { box-shadow: none; }
  .no-print, .wizard-header, .wizard-actions, .form-column > .panel:not(.form-step[data-step="5"]) { display: none !important; }
  .results-column, .form-column, .sticky-panel { position: static; width: 100%; }
  .results-panel, .quote-preview, .result-block, .metric-card { border: 1px solid #d1d5db; box-shadow: none; background: #fff; }
}