/* Landmass Generator - WorldSmith-style design system
   Mirrors: https://thebrokenwheel.co.uk/worldsmith/
*/

:root {
  --bg: #0f1220;
  --panel: #171b2e;
  --panel-2: #1d2240;
  --text: #e8e9f3;
  --muted: #a6abcc;
  --overlay-color: 255, 255, 255;
  --bg-rgb: 15, 18, 32;
  --panel-rgb: 23, 27, 46;
  --accent-rgb: 126, 178, 255;
  --border: rgba(var(--overlay-color), 0.1);
  --focus: rgba(var(--accent-rgb), 0.45);
  --accent: #7eb2ff;
  --good: #7cffb2;
  --warn: #ffd37c;
  --bad: #ff7c97;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 16px;
  --radius-sm: 12px;
  --pad: 16px;
  --gap: 16px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
}

* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: rgba(106, 158, 255, 0.35) transparent;
}
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; border-radius: 50px; }
::-webkit-scrollbar-thumb {
  background: rgba(106, 158, 255, 0.3);
  border: 1px solid rgba(122, 178, 255, 0.25);
  border-radius: 50px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(106, 158, 255, 0.5);
  border-color: rgba(122, 178, 255, 0.45);
}

html { background: var(--bg); }

body {
  height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at 50% 30%, #141834 0%, #0b0e1a 70%);
}
body > * { position: relative; z-index: 1; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ───────────────────────────────────────────── */
.app-header {
  flex-shrink: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 14px 18px;
  background: rgba(var(--bg-rgb), 0.75);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand__mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background-image: url(favicon.svg);
  background-size: cover;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  font-size: 0;
  color: transparent;
}
.brand__title { font-weight: 700; letter-spacing: 0.2px; }
.brand__subtitle { font-size: 12px; color: var(--muted); margin-top: 2px; }

.top-nav { display: flex; gap: 10px; }
.top-nav__link {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.top-nav__link:hover {
  background: rgba(var(--overlay-color), 0.06);
  border-color: var(--border);
  text-decoration: none;
}
.top-nav__link.is-active {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.3);
}

/* ── Main layout ──────────────────────────────────────── */
.app-main {
  flex: 1;
  overflow: hidden;
  min-height: 0;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--gap);
  padding: 14px;
  width: 100%;
}

/* ── Panel ────────────────────────────────────────────── */
.panel {
  background: rgba(var(--panel-rgb), 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap);
  padding: 10px 14px;
  background: rgba(var(--overlay-color), 0.03);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
}
.panel__header:hover {
  background: rgba(var(--overlay-color), 0.06);
}
.panel__header h2 {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  color: var(--muted);
}
.panel__chevron {
  font-size: 10px;
  color: var(--muted);
  transition: transform 200ms ease;
  flex-shrink: 0;
}
.panel.is-collapsed .panel__chevron {
  transform: rotate(-90deg);
}
.panel__body {
  padding: 12px 14px;
  min-width: 0;
  overflow: hidden;
  max-height: 600px;
  transition: max-height 250ms ease, padding 250ms ease, opacity 200ms ease;
  opacity: 1;
}
.panel.is-collapsed .panel__body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}
.panel.is-collapsed .panel__header {
  border-bottom-color: transparent;
}

/* ── Form controls ────────────────────────────────────── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}
.form-row--full {
  grid-template-columns: 1fr;
}
.label {
  color: var(--text);
  font-weight: 600;
  font-size: 12px;
}
.hint {
  color: var(--muted);
  font-size: 11px;
  margin-top: 2px;
}
.unit {
  font-size: 12px;
  color: var(--muted);
  margin-left: 6px;
  font-family: var(--mono);
}

input[type="number"],
input[type="text"] {
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(var(--bg-rgb), 0.35);
  color: var(--text);
  outline: none;
  font-family: var(--mono);
  font-size: 13px;
}
input[type="number"]:focus,
input[type="text"]:focus {
  border-color: rgba(var(--accent-rgb), 0.55);
  box-shadow: 0 0 0 4px var(--focus);
}

select {
  width: 100%;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(var(--bg-rgb), 0.35);
  color: var(--text);
  outline: none;
  font-size: 12px;
}
select:focus {
  border-color: rgba(var(--accent-rgb), 0.55);
  box-shadow: 0 0 0 4px var(--focus);
}

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

.range-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
}
.range-row:last-child {
  margin-bottom: 0;
}
.range-row__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.range-row__value {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.range-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 11px;
  font-family: var(--mono);
}

/* ── Buttons ──────────────────────────────────────────── */
button {
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(var(--overlay-color), 0.06);
  color: var(--text);
  font-size: 13px;
  font-family: var(--sans);
  transition: background 120ms ease, border-color 120ms ease;
}
button:hover {
  background: rgba(var(--overlay-color), 0.1);
}
button.primary {
  background: rgba(var(--accent-rgb), 0.18);
  border-color: rgba(var(--accent-rgb), 0.35);
}
button.primary:hover {
  background: rgba(var(--accent-rgb), 0.28);
}
button.small {
  padding: 5px 8px;
  font-size: 12px;
}
.button-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ── Sidebar controls ─────────────────────────────────── */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 6px;
  padding-bottom: 16px;
}

/* ── Preview area ─────────────────────────────────────── */
.preview-area {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  overflow-y: auto;
  padding-bottom: 16px;
}
.canvas-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(var(--bg-rgb), 0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 400px;
}
.canvas-wrap--transparent {
  background-color: rgba(var(--bg-rgb), 0.35);
  background-image:
    linear-gradient(45deg, rgba(var(--overlay-color), 0.08) 25%, transparent 25%, transparent 75%, rgba(var(--overlay-color), 0.08) 75%, rgba(var(--overlay-color), 0.08)),
    linear-gradient(45deg, rgba(var(--overlay-color), 0.08) 25%, transparent 25%, transparent 75%, rgba(var(--overlay-color), 0.08) 75%, rgba(var(--overlay-color), 0.08));
  background-position: 0 0, 12px 12px;
  background-size: 24px 24px;
}
.canvas-wrap canvas {
  image-rendering: pixelated;
  border-radius: 4px;
  max-width: 100%;
  max-height: calc(100vh - 260px);
  object-fit: contain;
}
.canvas-wrap--transparent canvas {
  box-shadow: 0 0 0 1px rgba(var(--overlay-color), 0.14);
}

/* ── Status bar ───────────────────────────────────────── */
.status-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 10px 16px;
  background: rgba(var(--panel-rgb), 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.status-bar__item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-bar__label { color: var(--muted); }
.status-bar__value {
  color: var(--text);
  font-weight: 600;
}

/* ── KPI-style stat cards ─────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.kpi {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
.kpi__label {
  color: var(--muted);
  font-size: 11px;
}
.kpi__value {
  margin-top: 4px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.2px;
  font-family: var(--mono);
}

/* ── Seed row ─────────────────────────────────────────── */
.seed-row {
  display: flex;
  gap: 4px;
  align-items: center;
}
.seed-row input {
  flex: 1;
  min-width: 0;
  font-size: 12px;
  padding: 6px 8px;
}
.seed-row button {
  flex-shrink: 0;
  padding: 6px 8px;
  font-size: 11px;
  white-space: nowrap;
}

/* ── Presets ───────────────────────────────────────────── */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.preset-grid button {
  padding: 7px 8px;
  font-size: 12px;
}

/* ── Subsection divider ───────────────────────────────── */
.subsection {
  margin-top: 6px;
}
.subsection__title {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* ── Examples tab ─────────────────────────────────────── */
.tab-content { display: none; }
.tab-content.is-active { display: flex; flex-direction: column; gap: var(--gap); }

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.example-thumb {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease;
  background: #000;
}
.example-thumb:hover {
  border-color: rgba(var(--accent-rgb), 0.4);
  transform: scale(1.02);
}
.example-thumb img {
  width: 100%;
  display: block;
  image-rendering: pixelated;
}
.example-thumb__label {
  padding: 6px 8px;
  font-size: 11px;
  color: var(--muted);
  background: rgba(var(--panel-rgb), 0.9);
  text-align: center;
}

/* ── Footer ───────────────────────────────────────────── */
.app-footer {
  padding: 14px 0 8px;
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.3px;
  opacity: 0.5;
}

/* ── Badge ────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid var(--border);
  background: rgba(var(--overlay-color), 0.04);
  color: var(--muted);
}

/* ── Tooltip ──────────────────────────────────────────── */
.tip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  margin-left: 8px;
  border-radius: 999px;
  border: 1px solid rgba(var(--overlay-color), 0.18);
  background: rgba(var(--overlay-color), 0.06);
  color: rgba(var(--overlay-color), 0.9);
  font-size: 12px;
  font-family: var(--mono);
  cursor: help;
  user-select: none;
}
.tip-icon:focus {
  outline: 2px solid rgba(var(--accent-rgb), 0.55);
  outline-offset: 2px;
}
.tooltip-bubble {
  position: fixed;
  z-index: 9999;
  max-width: 320px;
  white-space: pre-wrap;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(var(--panel-rgb), 0.96);
  border: 1px solid rgba(var(--overlay-color), 0.12);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  color: rgba(var(--overlay-color), 0.92);
  font-size: 13px;
  line-height: 1.35;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .app-header { flex-direction: column; align-items: stretch; gap: 10px; }
  .top-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    padding-bottom: 2px;
  }
  .app-main {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }
  .sidebar {
    overflow-y: visible;
  }
  .preview-area {
    overflow-y: visible;
  }
  .canvas-wrap canvas {
    max-height: 50vh;
  }
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .preset-grid { grid-template-columns: 1fr; }
  .examples-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}