/* Material Design 3 roles, generated from the seed #0b6e5f with material-color-utilities (tonal spot). */
:root {
  --md-primary: #046b5c;
  --md-on-primary: #ffffff;
  --md-primary-container: #a0f2df;
  --md-on-primary-container: #005045;
  --md-secondary-container: #cde8e0;
  --md-on-secondary-container: #334b46;
  --md-error-container: #ffdad6;
  --md-on-error-container: #93000a;
  --md-surface: #f5fbf7;
  --md-on-surface: #171d1b;
  --md-on-surface-variant: #3f4946;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #eff5f2;
  --md-surface-container: #e9efec;
  --md-surface-container-high: #e3eae6;
  --md-surface-container-highest: #dee4e1;
  --md-outline: #6f7976;
  --md-outline-variant: #bec9c5;
  --md-inverse-surface: #2b3230;
  --md-inverse-on-surface: #ecf2ef;
  --elevation-2: 0 1px 2px rgb(0 0 0 / 0.3), 0 2px 6px 2px rgb(0 0 0 / 0.15);
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --mono: ui-monospace, SFMono-Regular, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-primary: #84d6c3;
    --md-on-primary: #00382f;
    --md-primary-container: #005045;
    --md-on-primary-container: #a0f2df;
    --md-secondary-container: #334b46;
    --md-on-secondary-container: #cde8e0;
    --md-error-container: #93000a;
    --md-on-error-container: #ffdad6;
    --md-surface: #0e1513;
    --md-on-surface: #dee4e1;
    --md-on-surface-variant: #bec9c5;
    --md-surface-container-lowest: #090f0e;
    --md-surface-container-low: #171d1b;
    --md-surface-container: #1b211f;
    --md-surface-container-high: #252b29;
    --md-surface-container-highest: #303634;
    --md-outline: #89938f;
    --md-outline-variant: #3f4946;
    --md-inverse-surface: #dee4e1;
    --md-inverse-on-surface: #2b3230;
  }
}

@font-face {
  font-family: Roboto;
  src: url("/assets/roboto.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--md-surface);
  color: var(--md-on-surface);
  font: 16px/24px Roboto, system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--md-primary); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.icon { width: 18px; height: 18px; fill: currentColor; flex: none; }

/* Top app bar */
.top { background: var(--md-surface-container); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 22px; line-height: 28px; color: var(--md-on-surface); text-decoration: none; }
.brand svg { width: 28px; height: 28px; flex: none; }
.top nav { display: flex; align-items: center; gap: 4px; }

/* Type */
h1 { font-size: 32px; line-height: 40px; font-weight: 400; margin: 32px 0 8px; }
h2 { font-size: 24px; line-height: 32px; font-weight: 400; margin: 48px 0 12px; }
h3 { font-size: 16px; line-height: 24px; font-weight: 500; margin: 20px 0 4px; }
.lead { color: var(--md-on-surface-variant); max-width: 70ch; margin: 0 0 16px; }
.prose p { max-width: 72ch; margin: 0 0 12px; }

/* Buttons, with Material state layers drawn over the container colour */
.btn, .chip, .menu-list a, .cards a, .faq summary {
  background-image: linear-gradient(var(--layer, transparent) 0 0);
  transition: background-color 200ms var(--ease), color 200ms var(--ease);
}
:is(.btn, .chip, .menu-list a, .cards a, .faq summary):hover { --layer: color-mix(in srgb, currentColor 8%, transparent); }
:is(.btn, .chip, .menu-list a, .cards a, .faq summary):active { --layer: color-mix(in srgb, currentColor 12%, transparent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 20px;
  background-color: transparent;
  color: var(--md-primary);
  font: 500 14px/20px Roboto, system-ui, sans-serif;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.btn.filled { background-color: var(--md-primary); color: var(--md-on-primary); padding: 0 24px; }
.btn.tonal { background-color: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn.outlined { border-color: var(--md-outline); }
.btn:disabled {
  background-color: color-mix(in srgb, var(--md-on-surface) 12%, transparent);
  border-color: transparent;
  color: color-mix(in srgb, var(--md-on-surface) 50%, transparent);
  --layer: transparent;
  cursor: not-allowed;
}
.btn[hidden] { display: none; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 0 16px 0 8px;
  border: 1px solid var(--md-outline);
  border-radius: 8px;
  color: var(--md-on-surface);
  font: 500 14px/20px Roboto, system-ui, sans-serif;
  text-decoration: none;
}
.chip .icon { color: var(--md-primary); }

:is(a, button, summary, textarea, input, select):focus-visible { outline: 2px solid var(--md-primary); outline-offset: 2px; }
.file input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file:focus-within { outline: 2px solid var(--md-primary); outline-offset: 2px; }
.file { position: relative; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Tools menu */
.menu { position: relative; }
.menu summary { list-style: none; }
.menu summary::-webkit-details-marker { display: none; }
.menu[open] summary { background-color: var(--md-surface-container-high); }
.menu-list {
  position: absolute;
  z-index: 10;
  top: calc(100% + 4px);
  right: 0;
  width: 240px;
  margin: 0;
  padding: 8px 0;
  list-style: none;
  background: var(--md-surface-container);
  border-radius: 12px;
  box-shadow: var(--elevation-2);
}
.menu-list a { display: block; padding: 12px 16px; color: var(--md-on-surface); font-size: 14px; line-height: 24px; text-decoration: none; }
.menu-list .current { color: var(--md-primary); font-weight: 500; }
.menu-list .divider { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--md-outline-variant); }

/* Tool */
.tool { margin-top: 16px; background: var(--md-surface-container-low); border-radius: 16px; padding: 16px; }
.panes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panes.three .out { grid-column: 1 / -1; }
.pane { min-width: 0; display: flex; flex-direction: column; }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 48px; margin-bottom: 4px; flex-wrap: wrap; }
.pane-head label:not(.file), .pane-head .label { font-weight: 500; }

.box { position: relative; display: flex; }
textarea {
  width: 100%;
  height: 300px;
  resize: vertical;
  padding: 12px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 12px;
  background: var(--md-surface-container-lowest);
  color: var(--md-on-surface);
  font: 13px/20px var(--mono);
  tab-size: 2;
}
textarea::placeholder { color: var(--md-on-surface-variant); font: 14px/20px Roboto, system-ui, sans-serif; opacity: 1; }
.panes.three textarea { height: 200px; }
.panes.three .out textarea { height: 220px; }

/* Empty input doubles as the drop area. The hint hides itself as soon as the box has text. */
.box textarea[data-input]:placeholder-shown { border: 1px dashed var(--md-outline); }
.empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px;
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 14px;
  line-height: 20px;
  pointer-events: none;
}
.empty .icon { width: 32px; height: 32px; color: var(--md-outline); }
.empty p { margin: 0; }
.empty .btn { pointer-events: auto; }
textarea:not(:placeholder-shown) + .empty { display: none; }
.box.dragging textarea { border: 2px solid var(--md-primary); background: var(--md-primary-container); }
.box.dragging .empty { color: var(--md-on-primary-container); }

.status { min-height: 20px; margin: 8px 0 0; font-size: 14px; line-height: 20px; color: var(--md-on-surface-variant); overflow-wrap: anywhere; }
.status.ok { color: var(--md-primary); font-weight: 500; }
.status.error { padding: 12px 16px; border-radius: 12px; background: var(--md-error-container); color: var(--md-on-error-container); }
.notes { margin: 8px 0 0; padding-left: 20px; font-size: 14px; line-height: 20px; color: var(--md-on-surface-variant); }
.notes:empty { display: none; }

.controls { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--md-outline-variant); }
.controls form { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; flex: 1 1 auto; }

/* Outlined field with the label resting on the border */
.field { position: relative; display: inline-block; font-size: 14px; }
.field span {
  position: absolute;
  top: -8px;
  left: 8px;
  padding: 0 4px;
  background: var(--md-surface-container-low);
  color: var(--md-on-surface-variant);
  font-size: 12px;
  line-height: 16px;
}
.field select, .field input {
  height: 48px;
  max-width: 200px;
  padding: 0 12px;
  border: 1px solid var(--md-outline);
  border-radius: 4px;
  background: transparent;
  color: var(--md-on-surface);
  font: 14px/20px Roboto, system-ui, sans-serif;
}

.switch { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; font-size: 14px; line-height: 20px; cursor: pointer; }
.switch input {
  appearance: none;
  position: relative;
  flex: none;
  width: 52px;
  height: 32px;
  margin: 0;
  border: 2px solid var(--md-outline);
  border-radius: 16px;
  background: var(--md-surface-container-highest);
  cursor: pointer;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}
.switch input::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--md-outline);
  transform: translateY(-50%);
  transition: all 200ms var(--ease);
}
.switch input:checked { background: var(--md-primary); border-color: var(--md-primary); }
.switch input:checked::before { left: 22px; width: 24px; height: 24px; background: var(--md-on-primary); }

.snackbar {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  padding: 14px 16px;
  border-radius: 4px;
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  font-size: 14px;
  line-height: 20px;
  box-shadow: var(--elevation-2);
}
.snackbar[hidden] { display: none; }

/* Page content */
pre {
  background: var(--md-surface-container);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  font: 13px/20px var(--mono);
  margin: 0;
}
code { font-family: var(--mono); font-size: 0.92em; }
pre code { font-size: inherit; }
.example { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.example > div { min-width: 0; }
.example h3 { margin-top: 0; }

.hero { margin-top: 24px; padding: 48px; border-radius: 28px; background: var(--md-primary-container); color: var(--md-on-primary-container); }
.hero h1 { margin: 0 0 12px; font-size: clamp(32px, 5vw, 45px); line-height: 1.16; max-width: 18em; }
.hero .lead { margin: 0; color: inherit; }
.hero a { color: inherit; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; list-style: none; padding: 0; margin: 24px 0 0; }
.cards a { display: block; height: 100%; padding: 16px; border-radius: 16px; background-color: var(--md-surface-container-low); color: var(--md-on-surface); text-decoration: none; }
.cards strong { display: block; font-weight: 500; color: var(--md-primary); }
.cards span { display: block; margin-top: 4px; font-size: 14px; line-height: 20px; color: var(--md-on-surface-variant); }

.faq { border-bottom: 1px solid var(--md-outline-variant); max-width: 72ch; }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 56px; padding: 8px 12px; font-weight: 500; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icon { width: 24px; height: 24px; color: var(--md-on-surface-variant); transition: transform 200ms var(--ease); }
.faq[open] summary .icon { transform: rotate(180deg); }
.faq p { margin: 0; padding: 0 12px 16px; color: var(--md-on-surface-variant); }

footer { margin-top: 64px; padding: 24px 0 32px; background: var(--md-surface-container); font-size: 14px; line-height: 20px; color: var(--md-on-surface-variant); }
footer ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 0 0 12px; padding: 0; }

@media (pointer: coarse) {
  .btn { min-height: 48px; }
  .chip { min-height: 48px; }
}

@media (max-width: 720px) {
  .wrap { padding: 0 16px; }
  .brand { font-size: 18px; gap: 8px; }
  .top .about-link { display: none; }
  h1 { font-size: 28px; line-height: 36px; margin-top: 24px; }
  .panes, .example { grid-template-columns: minmax(0, 1fr); }
  .tool { padding: 12px; }
  textarea, .panes.three textarea { height: 200px; }
  .panes.three .out textarea { height: 200px; }
  .hero { padding: 24px; border-radius: 16px; margin-top: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}