/* style.css — Terminal UI（F-3）：全站等宽 · dark 磷光绿+扫描线+glow · light 纸白墨色
   控件 label '>' 前缀 · header prompt + 闪烁光标 · 主题 CSS 变量切换 */

/* ---------- 主题变量 ---------- */
:root {
  --font-mono: ui-monospace, "DejaVu Sans Mono", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0a;
  --fg: #00ff41;
  --fg-dim: rgba(0, 255, 65, 0.62);
  --panel: #0e0f0e;
  --border: #17331d;
  --hover-bg: rgba(0, 255, 65, 0.1);
  --glow: 0 0 6px rgba(0, 255, 65, 0.45);
  --text-glow: 0 0 4px rgba(0, 255, 65, 0.5);
  --canvas-shadow: 0 0 14px rgba(0, 255, 65, 0.22);
  --scan-opacity: 1;
  --scan-line: rgba(0, 255, 65, 0.055);
  --err: #ff5f56;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f2e9;
  --fg: #2a2620;
  --fg-dim: #6f675a;
  --panel: #efeade;
  --border: #d6cdb8;
  --hover-bg: rgba(42, 38, 32, 0.07);
  --glow: none;
  --text-glow: none;
  --canvas-shadow: 0 1px 5px rgba(42, 38, 32, 0.18);
  --scan-opacity: 0;
  --scan-line: rgba(42, 38, 32, 0.04);
  --err: #a33324;
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 20px 24px;
}
::selection { background: var(--fg); color: var(--bg); }

/* 细扫描线（dark 生效，light 隐藏） */
#scanlines {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: var(--scan-opacity);
  background: repeating-linear-gradient(
    to bottom,
    var(--scan-line) 0px, var(--scan-line) 1px,
    transparent 1px, transparent 3px
  );
}

/* 闪烁光标 */
.cursor { font-weight: bold; animation: blink 1.06s steps(1) infinite; }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
}

/* ---------- header ---------- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.prompt-line {
  font-size: 16px;
  font-weight: bold;
  text-shadow: var(--text-glow);
  white-space: nowrap;
  overflow: hidden;
}
.prompt { color: var(--fg-dim); }
.cmd { color: var(--fg); }
.header-actions { display: flex; gap: 8px; }

/* chip 按钮 */
.chip {
  font: inherit;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 10px;
  cursor: pointer;
  text-shadow: none;
  white-space: nowrap;
}
.chip:hover, .chip:focus-visible {
  background: var(--hover-bg);
  border-color: var(--fg);
  box-shadow: var(--glow);
}
.chip:disabled { opacity: 0.35; cursor: default; box-shadow: none; }

/* ---------- 拖拽区（F-5） ---------- */
#drop-zone {
  border: 2px dashed var(--border);
  border-radius: 6px;
  padding: 26px 16px;
  text-align: center;
  cursor: pointer;
  margin-bottom: 16px;
  transition: border-color 0.15s, background 0.15s;
}
#drop-zone:hover, #drop-zone:focus-visible, #drop-zone.dragover {
  border-color: var(--fg);
  background: var(--hover-bg);
  box-shadow: var(--glow);
}
.dz-title { margin: 0; font-weight: bold; font-size: 15px; text-shadow: var(--text-glow); }
.dz-title::before { content: "> "; color: var(--fg-dim); }
.dz-hint { margin: 6px 0 0; color: var(--fg-dim); font-size: 12px; }

/* ---------- 主布局 ---------- */
main {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 16px;
  align-items: start;
}
.panel {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  padding: 14px 16px;
}
.panel h2 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
  text-shadow: var(--text-glow);
}
.panel h2::before { content: "> "; }

/* ---------- 控件（label '>' 前缀） ---------- */
.ctl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 8px;
  align-items: center;
  margin-bottom: 14px;
}
.ctl > label[for] { grid-column: 1; }
.ctl > label[for]::before { content: "> "; color: var(--fg-dim); }
.ctl > .chk { grid-column: 2; justify-self: end; }
.ctl > .chk:only-child { grid-column: 1 / -1; justify-self: start; }
.ctl > .chk:only-child::before { content: "> "; color: var(--fg-dim); }
.ctl input[type="range"] { grid-column: 1; width: 100%; }
.ctl > output {
  grid-column: 2;
  justify-self: end;
  min-width: 3.2em;
  text-align: right;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
}
.chk { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; }
.chk input { margin: 0; }
input[type="range"], input[type="checkbox"] { accent-color: var(--fg); cursor: pointer; }
input[type="range"] { height: 1.4em; margin: 2px 0; }
input[type="range"]:disabled { opacity: 0.35; cursor: default; }

/* ---------- 输出 ---------- */
.output-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.output-bar h2 { margin: 0; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
#art-wrap {
  overflow: auto;
  border-radius: 4px;
  min-height: 120px;
  display: flex;
  justify-content: center;
}
#art { display: block; border-radius: 2px; box-shadow: var(--canvas-shadow); }
#placeholder { color: var(--fg-dim); padding: 40px 0; text-align: center; margin: 0; }
.status-line { margin-top: 10px; color: var(--fg-dim); font-size: 12px; min-height: 1.5em; }
.status-line.error { color: var(--err); }

footer {
  margin-top: 20px;
  text-align: center;
  color: var(--fg-dim);
  font-size: 12px;
}

@media (max-width: 860px) {
  main { grid-template-columns: 1fr; }
  body { padding: 12px 12px 20px; }
}

/* hidden 属性优先于任何 display（canvas/panel 切换） */
[hidden] { display: none !important; }