/* Reset, typography and shared controls (buttons, inputs, switches, sliders). */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  background: radial-gradient(1200px 700px at 20% -10%, #121827, var(--bg) 60%);
  color: var(--ink);
  font: 14px/1.45 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

a { color: var(--accent); }
[hidden] { display: none !important; }
svg { width: 20px; height: 20px; flex-shrink: 0; }

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

/* ---------- Buttons ---------- */
.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: color-mix(in srgb, var(--surface) 80%, #fff 3%);
  color: var(--ink);
  font: 600 13px var(--font);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, background .15s, transform .1s;
}
.btn:hover:not(:disabled) { border-color: var(--accent); box-shadow: 0 0 0 4px var(--glow); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: default; }
.btn svg { width: 16px; height: 16px; }
.btn.primary { background: color-mix(in srgb, var(--accent) 22%, var(--surface)); border-color: var(--accent); }
.btn.danger:hover:not(:disabled) { border-color: var(--danger); box-shadow: 0 0 0 4px color-mix(in srgb, var(--danger) 30%, transparent); }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }

/* Floating square icon button (same size as thumbnails) */
.icon-btn {
  appearance: none;
  display: grid;
  place-items: center;
  width: var(--thumb-size);
  height: var(--thumb-size);
  border: 1px solid var(--border);
  border-radius: var(--thumb-radius);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-float);
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, transform .1s, opacity .2s;
}
.icon-btn:hover { border-color: var(--accent); box-shadow: var(--shadow-float), 0 0 0 5px var(--glow); }
.icon-btn:active { transform: scale(.95); }
.icon-btn.small { width: 36px; height: 36px; border-radius: var(--radius-control); box-shadow: none; }
.icon-btn.small svg { width: 18px; height: 18px; }
.icon-btn[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }

/* ---------- Inputs ---------- */
.input {
  width: 100%;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  color: var(--ink);
  font: 500 14px var(--font);
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--glow); }
.input.mono { font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; }

/* Switch: <label class="switch"><input type="checkbox"><span>Label</span></label> */
.switch { display: flex; align-items: center; justify-content: space-between; gap: 12px; cursor: pointer; user-select: none; }
.switch input {
  appearance: none;
  order: 2;
  flex-shrink: 0;
  width: 38px;
  height: 22px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 30%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--muted) 25%, transparent);
  position: relative;
  cursor: pointer;
  transition: background .15s;
}
.switch input::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  transition: transform .15s var(--ease);
}
.switch input:checked { background: var(--accent); }
.switch input:checked::after { transform: translateX(16px); }

/* Slider: <label class="slider"><span>Label</span><input type="range"><output></output></label> */
.slider { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: center; }
.slider > span { color: var(--muted); font-size: 12px; }
.slider output { font: 600 12px var(--mono); color: var(--ink); text-align: right; }
.slider input { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); }

input[type="color"] {
  appearance: none;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: none;
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 3px; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 7px; }

kbd {
  display: inline-block;
  min-width: 24px;
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--surface);
  font: 600 12px var(--mono);
  text-align: center;
}

.muted { color: var(--muted); }
.input::placeholder { color: color-mix(in srgb, var(--muted) 70%, transparent); text-transform: none; letter-spacing: normal; }