:root {
  --bg: #d6e6f0;
  --panel: rgba(225, 240, 248, 0.82);
  --panel-strong: rgba(213, 232, 242, 0.95);
  --line: rgba(28, 78, 100, 0.2);
  --text: #0d2230;
  --muted: #3e5e6f;
  --accent: #0ea985;
  --accent-soft: rgba(14, 169, 133, 0.24);
  --shadow: 0 24px 60px rgba(11, 41, 58, 0.18);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.76), transparent 30%),
    radial-gradient(circle at bottom right, rgba(14, 169, 133, 0.24), transparent 36%),
    linear-gradient(135deg, #c5d9e7 0%, #d9e9f3 52%, #cae6de 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(17, 39, 52, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 39, 52, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(320px, 420px);
  gap: 24px;
  padding: 28px;
  min-height: 100vh;
}

.hero-panel,
.control-panel {
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 20px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(221, 236, 245, 0.94), rgba(232, 243, 250, 0.76));
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
.intro {
  margin: 0;
}

h1 {
  font-size: clamp(2.4rem, 3.2vw, 4.6rem);
  line-height: 0.95;
  max-width: 11ch;
}

.intro {
  margin-top: 16px;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--muted);
}

.viewer-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(236, 247, 252, 0.88), rgba(209, 229, 239, 0.97));
  border: 1px solid rgba(40, 90, 113, 0.24);
}

.viewer-toolbar,
.viewer-hint {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.status-badge {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
}

#verandaCanvas {
  width: 100%;
  height: min(70vh, 760px);
  display: block;
  cursor: grab;
  background:
    radial-gradient(circle at center 12%, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0) 38%),
    linear-gradient(180deg, #dcecf6 0%, #cfe2ee 36%, #c3dfd8 100%);
}

#verandaCanvas:active {
  cursor: grabbing;
}

.viewer-hint {
  justify-content: flex-start;
  border-top: 1px solid var(--line);
}

.control-panel {
  padding: 28px;
  background: var(--panel-strong);
}

.panel-header {
  margin-bottom: 28px;
}

.language-switch-row {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-switch-row label {
  color: var(--muted);
  font-size: 0.9rem;
}

.language-switch-row select {
  border: 1px solid rgba(37, 87, 110, 0.28);
  border-radius: 10px;
  padding: 6px 10px;
  font: inherit;
  color: var(--text);
  background: rgba(234, 246, 252, 0.94);
}

h2 {
  font-size: 2rem;
}

.config-form {
  display: grid;
  gap: 24px;
}

.field {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.field > span,
.fieldset legend {
  font-weight: 700;
}

.field-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.field-meta span {
  color: var(--muted);
}

input[type="number"] {
  width: 100%;
  border: 1px solid rgba(37, 87, 110, 0.24);
  border-radius: 14px;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: rgba(236, 247, 252, 0.95);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.fieldset {
  padding-top: 14px;
}

.fieldset legend {
  padding: 0 8px;
}

.fieldset.is-disabled {
  opacity: 0.56;
}

.fieldset.is-disabled .choice-row {
  background: rgba(234, 246, 252, 0.4);
}

.fieldset.is-disabled .choice-row span {
  color: rgba(68, 96, 111, 0.72);
}

.choice-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(233, 246, 252, 0.78);
}

.choice-row input {
  margin: 0;
  accent-color: var(--accent);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 16px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(229, 244, 251, 0.97), rgba(210, 231, 241, 0.9));
  border: 1px solid var(--line);
}

.stat-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.stat-card strong {
  font-size: 1.28rem;
}

@media (max-width: 1024px) {
  .page-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .hero-panel,
  .control-panel {
    padding: 20px;
  }

  #verandaCanvas {
    height: min(56vh, 520px);
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 2.6rem;
  }

  .viewer-toolbar,
  .viewer-hint {
    flex-direction: column;
    align-items: flex-start;
  }

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