/*
 * Styling for the 3D Terrain Generator.
 *
 * The palette, type scale and spacing mirror yaredwb.com so the app reads as
 * part of the same site: Flexoki paper and rust, Space Grotesk for headings,
 * Inter for body copy, IBM Plex Mono for labels and numbers.
 */

:root {
  --color-page: #fffcf0;
  --color-raised: #f2f0e5;
  --color-border: #e6e4d9;
  --color-border-strong: #cecdc3;
  --color-text: #100f0f;
  --color-text-secondary: #403e3c;
  --color-muted: #6f6e69;
  --color-faint: #878580;
  --color-accent: #bc5215;
  --color-accent-hover: #9d440f;
  --color-accent-soft: rgba(188, 82, 21, 0.08);
  --color-accent-contrast: #fffcf0;
  --color-warn: #ad8301;
  --color-error: #af3029;
  --color-ok: #66800b;

  --font-display: "Space Grotesk", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Monaco, Consolas, monospace;

  --radius-lg: 10px;
  --radius-md: 6px;
  --radius-sm: 4px;

  --spacing-2xs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 18px;
  --spacing-lg: 26px;

  --rail-width: 316px;
  --transition-fast: 120ms ease-out;
}

[data-theme="dark"] {
  --color-page: #100f0f;
  --color-raised: #1c1b1a;
  --color-border: #282726;
  --color-border-strong: #403e3c;
  --color-text: #cecdc3;
  --color-text-secondary: #b7b5ac;
  --color-muted: #878580;
  --color-faint: #6f6e69;
  --color-accent: #da702c;
  --color-accent-hover: #e8884a;
  --color-accent-soft: rgba(218, 112, 44, 0.12);
  --color-accent-contrast: #100f0f;
  --color-warn: #d0a215;
  --color-error: #d14d41;
  --color-ok: #879a39;
}

/* ---------- base ---------- */

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

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-page);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

h1, h2 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  color: var(--color-text);
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-page);
  flex: none;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  min-width: 0;
}

.topbar__brand h1 {
  margin: 0;
  font-size: 0;      /* the wordmark is the heading; alt text carries it */
  line-height: 0;
  flex: none;
}

/* The wordmark is a 343 x 79 banner: fix the height and let the width follow,
   rather than boxing it into a square where it collapses to a sliver. */
.topbar__logo {
  display: block;
  height: 30px;
  width: auto;
}

/* The artwork is dark ink on transparency, so on the dark theme it is redrawn
   as a light silhouette instead of disappearing into the background. */
[data-theme="dark"] .topbar__logo {
  filter: brightness(0) invert(0.86);
}

.topbar__brand p {
  margin: 0;
  padding-left: var(--spacing-md);
  border-left: 1px solid var(--color-border-strong);
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--color-muted);
}

.topbar__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: none;
}

.topbar__nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}
.topbar__nav a:hover { color: var(--color-accent); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-raised);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.theme-toggle:hover {
  border-color: var(--color-border-strong);
  color: var(--color-accent);
}
.theme-toggle__icon { width: 17px; height: 17px; fill: currentColor; }
[data-theme="light"] .theme-toggle__icon--sun { display: none; }
[data-theme="dark"] .theme-toggle__icon--moon { display: none; }

/* ---------- layout ---------- */

.layout {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}

.controls {
  border-right: 1px solid var(--color-border);
  background: var(--color-raised);
  overflow-y: auto;
  padding-bottom: var(--spacing-lg);
}

.canvas {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
  overflow-y: auto;
  min-width: 0;
}

/* ---------- control groups ---------- */

.group {
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.group h2 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-faint);
  margin-bottom: var(--spacing-sm);
}

.field {
  display: block;
  margin-bottom: var(--spacing-sm);
}

.field > span {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xs);
}

/* Labels that carry a live readout push it to the opposite edge. */
.field > span.field__label--split {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--spacing-xs);
}

.field-row {
  display: flex;
  gap: var(--spacing-xs);
}
.field-row .field { flex: 1; min-width: 0; }

input[type="number"],
input[type="file"],
select {
  width: 100%;
  padding: 7px 9px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text);
  background: var(--color-page);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

input[type="file"] {
  font-family: var(--font-body);
  font-size: 0.76rem;
  padding: 6px;
}

input[type="number"]:hover,
select:hover { border-color: var(--color-muted); }

input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
                    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: right 13px center, right 8px center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 26px;
  cursor: pointer;
}

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

output {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--color-muted);
}

.check {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
  cursor: pointer;
}
.check input {
  accent-color: var(--color-accent);
  width: 14px;
  height: 14px;
  cursor: pointer;
}

.subpanel {
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-page);
}
.subpanel > :last-child { margin-bottom: 0; }

.hint {
  margin: var(--spacing-xs) 0 0;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--color-muted);
}

.button {
  padding: 7px 12px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-page);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.button:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.button:disabled { opacity: 0.55; cursor: default; }

.button--primary {
  width: 100%;
  color: var(--color-accent-contrast);
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.button--primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-accent-contrast);
}

.button-row { display: flex; gap: var(--spacing-xs); }
.button-row .button { flex: 1; }

.dataset-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2xs) var(--spacing-sm);
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: 1px dashed var(--color-border-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
}

.about {
  padding: var(--spacing-md);
}
.about p {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-faint);
}

/* ---------- plots ---------- */

.status {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-border-strong);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
  background: var(--color-raised);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}
.status[data-kind="busy"]  { border-left-color: var(--color-muted); }
.status[data-kind="ok"]    { border-left-color: var(--color-ok); }
.status[data-kind="warn"]  { border-left-color: var(--color-warn); }
.status[data-kind="error"] { border-left-color: var(--color-error); color: var(--color-error); }

.plot {
  display: flex;
  flex-direction: column;
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-raised);
  overflow: hidden;
  min-width: 0;
}

.plot figcaption {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-faint);
}

.plot__area { width: 100%; }

.plot--terrain { flex: 1; min-height: 440px; }
.plot--terrain .plot__area { flex: 1; min-height: 400px; }

.plot-row {
  display: grid;
  grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
  gap: var(--spacing-md);
  flex: none;
}

.plot--plan .plot__area { height: 300px; }
.plot--profile .plot__area { height: 300px; }

/* Plotly's mode bar sits on a transparent paper background; soften it so it
   does not fight the card it floats over. */
.modebar { background: transparent !important; }
.modebar-btn path { fill: var(--color-muted) !important; }
.modebar-btn:hover path { fill: var(--color-accent) !important; }

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .plot-row { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  body { height: auto; }
  .layout {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }
  .controls {
    border-right: none;
    border-top: 1px solid var(--color-border);
    overflow-y: visible;
  }
  /* Show the terrain first on a phone; the control rail is a long scroll to
     sit through before anything is visible. */
  .canvas {
    order: -1;
    overflow-y: visible;
    padding: var(--spacing-md);
  }
  .plot--terrain { min-height: 380px; }
  .plot--terrain .plot__area { min-height: 340px; }
  .topbar { flex-wrap: wrap; padding: var(--spacing-sm) var(--spacing-md); }
  .topbar__brand p { display: none; }
  .topbar__logo { height: 24px; }
}