@font-face {
  font-family: "Forma DJR Text";
  src: url("/site/assets/fonts/forma-djr-text-regular-web.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Forma DJR Text";
  src: url("/site/assets/fonts/forma-djr-text-bold-web.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;
  --board-font-size: 50px;
  --board-bg: #f3f2f7;
  --board-text: #111113;
  --board-muted: #8a8a90;
  --board-border: #d2d2d7;
  --board-border-soft: #e8e8ed;
  --board-surface: #f5f5f7;
  --board-surface-elevated: #fbfbfd;
  --board-accent: #0066cc;
  --board-accent-soft: #e8f2ff;
  --rule-bg: #fff2a8;
  --rule-text: #111113;
  --selection: rgba(0, 102, 204, 0.18);
}

:root[data-theme="light"] {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --board-bg: #08090a;
    --board-text: #f5f5f7;
    --board-muted: #a1a1a6;
    --board-border: rgba(235, 235, 245, 0.24);
    --board-border-soft: rgba(235, 235, 245, 0.13);
    --board-surface: #18191b;
    --board-surface-elevated: #121315;
    --board-accent: #2997ff;
    --board-accent-soft: rgba(41, 151, 255, 0.14);
    --rule-bg: #5c4f20;
    --rule-text: #fff2b3;
    --selection: rgba(41, 151, 255, 0.22);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --board-bg: #08090a;
  --board-text: #f5f5f7;
  --board-muted: #a1a1a6;
  --board-border: rgba(235, 235, 245, 0.24);
  --board-border-soft: rgba(235, 235, 245, 0.13);
  --board-surface: #18191b;
  --board-surface-elevated: #121315;
  --board-accent: #2997ff;
  --board-accent-soft: rgba(41, 151, 255, 0.14);
  --rule-bg: #5c4f20;
  --rule-text: #fff2b3;
  --selection: rgba(41, 151, 255, 0.22);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  min-width: 320px;
  min-height: 100%;
  transition: background-color 0.25s ease, color 0.25s ease;
}

body {
  margin: 0;
  background: var(--board-bg);
  color: var(--board-text);
  font-family: "Forma DJR Text", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.25s ease, color 0.25s ease;
}

::selection {
  background: var(--selection);
}

.board-shell {
  min-height: 100dvh;
  padding: clamp(18px, 4vw, 56px);
  padding-bottom: max(clamp(18px, 4vw, 56px), calc(env(safe-area-inset-bottom) + 82px));
}

.board {
  width: 100%;
  min-height: calc(100dvh - clamp(36px, 8vw, 112px));
  outline: none;
  color: var(--board-text);
  font-size: clamp(30px, 8vw, var(--board-font-size));
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  caret-color: var(--board-text);
  transition: color 0.25s ease, caret-color 0.25s ease;
}

.board:focus-visible {
  outline: none;
}

.board:empty::before {
  content: "";
}

.rule {
  display: inline;
  padding: 0 0.12em 0.04em;
  border-radius: 0.08em;
  background: var(--rule-bg);
  color: var(--rule-text);
  font-weight: 700;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.qr {
  display: block;
  width: min(38vmin, 320px);
  height: auto;
  margin: 0.35em 0;
}

.theme-toggle {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 10;
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  appearance: none;
  border: 1px solid var(--board-border-soft);
  border-radius: 999px;
  background: var(--board-surface-elevated);
  background: color-mix(in srgb, var(--board-surface-elevated) 86%, transparent);
  color: var(--board-muted);
  cursor: pointer;
  backdrop-filter: blur(16px);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease, transform 0.15s ease;
}

.theme-toggle:hover {
  border-color: var(--board-border);
  background: var(--board-surface);
  color: var(--board-text);
}

.theme-toggle:active {
  transform: scale(0.94);
}

.theme-toggle:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--board-accent) 30%, transparent);
  outline-offset: 2px;
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle-label {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 720px) {
  .board-shell {
    padding: 18px;
    padding-bottom: max(18px, calc(env(safe-area-inset-bottom) + 82px));
  }

  .board {
    min-height: calc(100dvh - 36px);
    font-size: clamp(30px, 12vw, var(--board-font-size));
    line-height: 1.1;
  }
}