@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&family=DM+Sans:wght@300;400;500;600&display=swap');

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

:root {
  --bg0: #080c12;
  --bg1: #0d1420;
  --bg2: #121b2e;
  --bg3: #182338;
  --border: rgba(0,212,255,0.12);
  --border-bright: rgba(0,212,255,0.35);
  --cyan: #00d4ff;
  --cyan-dim: rgba(0,212,255,0.6);
  --cyan-faint: rgba(0,212,255,0.08);
  --amber: #f0a500;
  --green: #00e5a0;
  --red: #ff4d6a;
  --text: #d8e8f0;
  --text-dim: #7a97b0;
  --text-faint: #3d5568;
  --mono: 'Space Mono', monospace;
  --sans: 'DM Sans', sans-serif;
  --radius: 6px;
  --radius-lg: 10px;
}

body {
  font-family: var(--sans);
  background: var(--bg0);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Blueprint grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 20px 20px, 20px 20px, 100px 100px, 100px 100px;
  pointer-events: none;
  z-index: 0;
}

/* ── Header ─────────────────────────────────────────── */
header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(8,12,18,0.85);
  backdrop-filter: blur(12px);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 32px; height: 32px;
  border: 1.5px solid var(--cyan);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.logo-icon::after {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(0,212,255,0.4);
  border-radius: 2px;
}
.logo-cross {
  width: 14px; height: 14px;
  position: relative;
}
.logo-cross::before, .logo-cross::after {
  content: '';
  position: absolute;
  background: var(--cyan);
}
.logo-cross::before { width: 100%; height: 1.5px; top: 50%; transform: translateY(-50%); }
.logo-cross::after  { height: 100%; width: 1.5px; left: 50%; transform: translateX(-50%); }
.logo-text { font-family: var(--mono); font-size: 15px; font-weight: 700; color: var(--text); letter-spacing: 0.05em; }
.logo-text span { color: var(--cyan); }
.header-badge {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--cyan-dim);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 3px;
  letter-spacing: 0.1em;
}

/* ── Steps ───────────────────────────────────────────── */
.steps-bar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 28px;
  background: rgba(13,20,32,0.7);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text-faint);
  white-space: nowrap;
  position: relative;
  transition: color 0.2s;
}
.step.active { color: var(--cyan); }
.step.done   { color: var(--green); }
.step-num {
  width: 20px; height: 20px;
  border: 1px solid currentColor;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px;
  flex-shrink: 0;
}
.step.done .step-num::after { content: '✓'; font-size: 11px; }
.step-sep { color: var(--text-faint); font-size: 10px; opacity: 0.4; }

/* ── Main ─────────────────────────────────────────────── */
.main {
  position: relative;
  z-index: 1;
  padding: 28px;
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Upload zone ─────────────────────────────────────── */
.upload-zone {
  border: 1.5px dashed rgba(0,212,255,0.3);
  border-radius: var(--radius-lg);
  background: rgba(0,212,255,0.03);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 40px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 380px;
}
.upload-zone:hover, .upload-zone.dragging {
  border-color: var(--cyan);
  background: rgba(0,212,255,0.06);
}
.upload-icon {
  width: 64px; height: 64px;
  border: 1.5px solid rgba(0,212,255,0.3);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.upload-icon svg { color: var(--cyan-dim); }
.upload-title {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--text);
  text-align: center;
}
.upload-sub {
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
  max-width: 360px;
  line-height: 1.6;
}
#file-input { display: none; }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 10px 22px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary {
  background: var(--cyan);
  color: var(--bg0);
}
.btn-primary:hover { background: #33dcff; }
.btn-primary:disabled { background: rgba(0,212,255,0.25); color: var(--text-faint); cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--cyan-dim);
  border: 1px solid var(--border-bright);
}
.btn-ghost:hover { background: var(--cyan-faint); color: var(--cyan); }

/* ── Config panel ──────────────────────────────────────── */
.config-panel {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
}
.preview-container {
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}
.preview-container img {
  max-width: 100%;
  max-height: 500px;
  display: block;
}
.config-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}
.card-title {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-dim);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.card-title::before {
  content: '';
  display: inline-block;
  width: 3px; height: 12px;
  background: var(--cyan);
  border-radius: 2px;
}
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }
.field label {
  display: block;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--text-dim);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.field select, .field input[type="text"] {
  width: 100%;
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 10px;
  outline: none;
  appearance: none;
  transition: border-color 0.15s;
}
.field select:focus, .field input[type="text"]:focus {
  border-color: var(--cyan-dim);
}
.field select option { background: var(--bg1); }
.radio-group { display: flex; gap: 8px; }
.radio-opt {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  transition: all 0.15s;
}
.radio-opt input { display: none; }
.radio-opt.selected { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-faint); }

/* ── Analyzing view ──────────────────────────────────── */
.analyzing-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 24px;
}
.scan-ring {
  width: 80px; height: 80px;
  border: 2px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  position: relative;
}
.scan-ring::after {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid transparent;
  border-top-color: rgba(0,212,255,0.4);
  border-radius: 50%;
  animation: spin 1.5s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.analyzing-text { font-family: var(--mono); font-size: 13px; color: var(--cyan); }
.analyzing-sub  { font-size: 12px; color: var(--text-dim); font-family: var(--mono); }
.log-lines {
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  width: 360px;
  max-height: 140px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.log-line { display: flex; gap: 8px; animation: fadein 0.3s ease; }
.log-line .log-ts  { color: var(--text-faint); }
.log-line .log-msg { color: var(--cyan-dim); }
@keyframes fadein { from { opacity:0; transform: translateY(4px); } to { opacity:1; transform:none; } }

/* ── Results view ─────────────────────────────────────── */
.results-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 20px;
  align-items: start;
}
.canvas-container {
  position: relative;
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  line-height: 0;
}
.canvas-container img {
  display: block;
  width: 100%;
}
#overlay-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
.canvas-toolbar {
  position: absolute;
  top: 10px; left: 10px;
  display: flex;
  gap: 6px;
  z-index: 5;
}
.tool-btn {
  background: rgba(8,12,18,0.85);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  color: var(--cyan-dim);
  font-family: var(--mono);
  font-size: 10px;
  padding: 5px 8px;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: all 0.15s;
  backdrop-filter: blur(6px);
}
.tool-btn:hover, .tool-btn.active {
  background: var(--cyan-faint);
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ── Measurements panel ─────────────────────────────────── */
.measurements-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.stat-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}
.stat-label { font-size: 10px; font-family: var(--mono); color: var(--text-faint); letter-spacing: 0.08em; margin-bottom: 4px; }
.stat-value { font-size: 18px; font-family: var(--mono); color: var(--text); font-weight: 700; }
.stat-value.cyan  { color: var(--cyan); }
.stat-value.green { color: var(--green); }
.stat-value.amber { color: var(--amber); }

.wall-list { display: flex; flex-direction: column; gap: 6px; }
.wall-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 10px;
}
.wall-item:hover { border-color: var(--border-bright); background: rgba(0,212,255,0.04); }
.wall-item.highlighted { border-color: var(--cyan); background: var(--cyan-faint); }
.wall-dot {
  width: 10px; height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}
.wall-info { flex: 1; min-width: 0; }
.wall-name { font-size: 12px; font-weight: 500; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wall-dims { font-family: var(--mono); font-size: 10px; color: var(--text-dim); margin-top: 1px; }
.wall-notes { font-family: var(--mono); font-size: 10px; color: var(--text-dim); white-space: nowrap; max-width: 120px; overflow: hidden; text-overflow: ellipsis; }

.notes-box {
  background: var(--bg2);
  border: 1px solid rgba(240,165,0,0.2);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
}
.notes-box .notes-title {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--amber);
  margin-bottom: 6px;
  letter-spacing: 0.08em;
}

.export-row { display: flex; gap: 8px; }
.scale-badge {
  position: absolute;
  bottom: 10px; right: 10px;
  background: rgba(8,12,18,0.9);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 5px 10px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--cyan);
  backdrop-filter: blur(6px);
  z-index: 5;
}

/* ── Error ───────────────────────────────────────────── */
.error-banner {
  background: rgba(255,77,106,0.08);
  border: 1px solid rgba(255,77,106,0.3);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  color: #ff8fa3;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Utility ─────────────────────────────────────────── */
.hidden { display: none !important; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg0); }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 3px; }