:root {
  --ink: #0f2744;
  --ink-soft: #3a516b;
  --paper: #f3efe6;
  --paper-deep: #e7e0d2;
  --line: #c9c0ae;
  --accent: #0f2744;
  --accent-hot: #c45c26;
  --wall: #1a3354;
  --room-fill: rgba(255, 255, 255, 0.72);
  --room-sel: rgba(196, 92, 38, 0.18);
  --door: #2f6fed;
  --window: #1f9d8a;
  --danger: #b33a3a;
  --shadow: 0 18px 50px rgba(15, 39, 68, 0.12);
  --font-display: "DM Sans", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "DM Sans", sans-serif;
  --radius: 6px;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  padding: 0.7rem 1.15rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: #f7f3ea;
}

.btn-primary:hover {
  background: #173456;
}

.btn-ghost {
  border-color: transparent;
  background: rgba(15, 39, 68, 0.06);
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.brand-sm {
  letter-spacing: 0.18em;
  font-size: 0.95rem;
}

/* ===== Landing ===== */
body.landing {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 15% 20%, rgba(196, 92, 38, 0.16), transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 70%, rgba(15, 39, 68, 0.12), transparent 50%),
    linear-gradient(160deg, #f7f2e8 0%, #ebe4d4 45%, #dfe8e4 100%);
}

.landing-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.landing-grid {
  width: 100%;
  height: 100%;
  color: rgba(15, 39, 68, 0.14);
  animation: drift 28s linear infinite;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-20px, -12px, 0); }
}

.landing-header {
  position: relative;
  z-index: 1;
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.landing-hero {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - 5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem clamp(1.25rem, 6vw, 5rem) 4rem;
  max-width: 920px;
  animation: rise 0.8s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.brand-mark {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 7rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 0.95;
  color: var(--ink);
}

.landing-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2.2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.lead {
  margin: 0 0 2rem;
  max-width: 34rem;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s 0.15s ease both;
}

.cta-row .btn-primary {
  animation: pulseSoft 2.8s ease-in-out infinite;
}

@keyframes pulseSoft {
  0%, 100% { box-shadow: 0 0 0 0 rgba(15, 39, 68, 0.25); }
  50% { box-shadow: 0 0 0 10px rgba(15, 39, 68, 0); }
}

/* ===== Editor ===== */
body.editor-page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: #ddd6c8;
  overflow: hidden;
}

.editor-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1rem;
  background: var(--ink);
  color: #f3efe6;
  flex-shrink: 0;
}

.editor-top .brand {
  color: #f3efe6;
}

.top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.editor-top .btn {
  border-color: rgba(243, 239, 230, 0.35);
  color: #f3efe6;
  background: transparent;
}

.editor-top .btn-primary {
  background: var(--accent-hot);
  border-color: var(--accent-hot);
  color: #fff;
}

.editor-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 210px 1fr 230px;
  gap: 0;
}

.panel {
  background: #f7f2e8;
  border-right: 1px solid var(--line);
  padding: 0.9rem;
  overflow: auto;
}

.panel-right {
  border-right: none;
  border-left: 1px solid var(--line);
}

.panel-label {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 700;
}

.panel-label + .panel-label,
.preset-list + .panel-label,
.tool-list + .panel-label {
  margin-top: 1.25rem;
}

.tool-list,
.preset-list {
  display: grid;
  gap: 0.4rem;
}

.tool,
.preset-list button {
  border: 1px solid var(--line);
  background: #fffdf8;
  color: var(--ink);
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius);
  cursor: pointer;
}

.tool:hover,
.preset-list button:hover {
  border-color: var(--ink);
}

.tool.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #f7f2e8;
}

.tool-danger,
.btn.tool-danger {
  color: var(--danger);
  border-color: rgba(179, 58, 58, 0.45);
}

.tool.tool-danger.active {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.hint {
  margin: 1.25rem 0 0;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.canvas-wrap {
  position: relative;
  min-width: 0;
  min-height: 0;
  background:
    linear-gradient(180deg, #d8d0c0, #cfc6b4);
  overflow: hidden;
}

#planCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

.canvas-status {
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  right: 0.75rem;
  padding: 0.4rem 0.65rem;
  background: rgba(15, 39, 68, 0.82);
  color: #f3efe6;
  font-size: 0.75rem;
  border-radius: var(--radius);
  pointer-events: none;
}

.props-empty {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.props-form {
  display: grid;
  gap: 0.75rem;
}

.props-form label {
  display: grid;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.props-form input {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem 0.6rem;
  background: #fffdf8;
  color: var(--ink);
}

.props-meta {
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

@media (max-width: 900px) {
  .editor-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(42vh, 1fr) auto;
  }

  .panel {
    border: none;
    border-bottom: 1px solid var(--line);
    max-height: 30vh;
  }

  .panel-left {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 0.75rem;
    align-content: start;
  }

  .panel-left .panel-label:first-child,
  .panel-left .tool-list {
    grid-column: 1 / -1;
  }

  .panel-left .hint {
    display: none;
  }

  .panel-right {
    border-left: none;
    border-top: 1px solid var(--line);
    max-height: 28vh;
  }

  .tool-list,
  .preset-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .top-actions {
    justify-content: flex-end;
  }

  .brand-mark {
    letter-spacing: 0.08em;
  }

  .cta-row .btn {
    width: 100%;
  }

  .canvas-status {
    font-size: 0.68rem;
  }
}