/* AICoderMap base — variables, themes, reset, form controls, toggles. */

:root,
html[data-theme="dark"] {
  /* DARK palette — softer black + brighter text for low fatigue */
  --bg: #181c22;
  --surface: #242a32;
  --surface-2: #2e353e;
  --surface-hover: #383f49;
  --border: #3d4651;
  --border-strong: #56616e;
  --track: #4a5462;
  --text: #f0f3f7;
  --muted: #a8b3c2;
  --accent: #6ee7b3;
  --accent-strong: #58d59d;
  --accent-2: #5dd4f0;
  --warn: #fbbf6b;
  --danger: #f47b8b;
  --ok: #6ee7b3;
  --on-accent: #0a0e12;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.55);
  --shadow-soft: 0 1px 3px rgba(0, 0, 0, 0.40);
  --accent-tint: rgba(110, 231, 179, 0.10);
  --accent-soft: rgba(110, 231, 179, 0.50);
  --accent-2-soft: rgba(93, 212, 240, 0.50);
  --warn-soft: rgba(251, 191, 107, 0.55);
  --danger-soft: rgba(244, 123, 139, 0.60);
  --bg-glass: rgba(24, 28, 34, 0.92);
}
html[data-theme="light"] {
  /* LIGHT palette */
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-2: #eef1f6;
  --surface-hover: #e6ebf2;
  --border: #d8dee5;
  --border-strong: #a8b1bc;
  --track: #d2d9e2;
  --text: #1a1f26;
  --muted: #5a6573;
  --accent: #14a05a;
  --accent-strong: #0e8447;
  --accent-2: #1f6fce;
  --warn: #c2630c;
  --danger: #dc2626;
  --ok: #14a05a;
  --on-accent: #ffffff;
  --shadow: 0 4px 20px rgba(15, 25, 40, 0.10);
  --shadow-soft: 0 1px 3px rgba(15, 25, 40, 0.08);
  --accent-tint: rgba(20, 160, 90, 0.10);
  --accent-soft: rgba(20, 160, 90, 0.45);
  --accent-2-soft: rgba(31, 111, 206, 0.45);
  --warn-soft: rgba(194, 99, 12, 0.45);
  --danger-soft: rgba(220, 38, 38, 0.45);
  --bg-glass: rgba(247, 249, 252, 0.90);
}
:root {
  --radius: 10px;
  --radius-sm: 6px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

/* Skip-to-content link — accessible keyboard escape from the header.
   Visually hidden until focused; required for Lighthouse a11y "bypass blocks". */
.skip-link {
  position: absolute;
  top: -100px;
  left: 8px;
  z-index: 9999;
  background: var(--accent);
  color: var(--on-accent);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease-out;
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 8px;
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}
a:hover, a:focus-visible { text-decoration: underline; }

button {
  font-family: inherit;
  cursor: pointer;
}

input, select, button {
  font-size: 14px;
}

input[type="number"], input[type="search"], select {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  min-width: 0;
}

/* Hide native number spinner buttons (keyboard ↑↓ still works) */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

/* Range slider — accent fill on contrast track, themable */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: linear-gradient(
    to right,
    var(--accent) 0%,
    var(--accent) calc(var(--val, 0) * 1%),
    var(--track) calc(var(--val, 0) * 1%),
    var(--track) 100%
  );
  border: 1px solid var(--border);
  border-radius: 999px;
  outline: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: transparent;
  border-radius: 999px;
}
input[type="range"]::-moz-range-track {
  height: 6px;
  background: transparent;
  border-radius: 999px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  cursor: pointer;
  margin-top: -6px;
  box-shadow: 0 0 0 1px var(--border-strong), var(--shadow-soft);
  transition: transform 100ms;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.1); }
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  cursor: pointer;
  box-shadow: 0 0 0 1px var(--border-strong), var(--shadow-soft);
}
input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

input[type="number"]:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* Lang toggle (segmented control) */
.lang-toggle {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface-2);
}
.lang-toggle button {
  padding: 6px 14px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background 120ms, color 120ms;
}
.lang-toggle button + button { border-left: 1px solid var(--border); }
.lang-toggle button:hover { color: var(--text); }
.lang-toggle button.active {
  background: var(--accent);
  color: var(--on-accent);
}
.lang-toggle button.active:hover { color: var(--on-accent); }
.lang-toggle button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  position: relative;
  z-index: 1;
}

/* Theme toggle (segmented, mirrors lang-toggle) */
.theme-toggle {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface-2);
}
.theme-toggle button {
  width: 32px;
  height: 30px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 120ms, color 120ms;
}
.theme-toggle button + button { border-left: 1px solid var(--border); }
.theme-toggle button:hover { color: var(--text); }
.theme-toggle button.active {
  background: var(--accent);
  color: var(--on-accent);
}
.theme-toggle button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  position: relative;
  z-index: 1;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-weight: 500;
  transition: border-color 120ms, background 120ms;
}
.btn:hover { border-color: var(--border-strong); }
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-ghost { background: transparent; }
.btn-icon { padding: 6px 10px; font-size: 12px; }
.btn-icon-only {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--muted);
  cursor: pointer;
  transition: color 120ms, border-color 120ms, background 120ms;
}
.btn-icon-only:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-tint);
}
.btn-icon-only svg { display: block; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.btn .icon { width: 16px; height: 16px; }

/* Instant CSS tooltip (replaces native title delay).
 * Default: anchored above the host, horizontally centered.
 * data-tip-align="end"   anchors the tooltip's right edge to the host's right
 * data-tip-align="start" anchors the tooltip's left edge to the host's left
 * (set by clampTooltip in events.js when the host sits near a viewport edge). */
[data-tip] { position: relative; }
[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  max-width: min(260px, calc(100vw - 16px));
  width: max-content;
  padding: 6px 10px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.3;
  text-align: center;
  white-space: normal;
  overflow-wrap: anywhere;
  pointer-events: none;
  z-index: 100;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity 90ms ease, visibility 0s linear 90ms;
}
[data-tip]:hover::after,
[data-tip]:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s, 0s;
}
[data-tip][data-tip-position="bottom"]::after {
  bottom: auto;
  top: calc(100% + 6px);
}
[data-tip][data-tip-align="end"]::after {
  left: auto;
  right: 0;
  transform: none;
}
[data-tip][data-tip-align="start"]::after {
  left: 0;
  right: auto;
  transform: none;
}