/* =====================================================================
   主题配色：通过 <html data-theme="..."> 切换，未设置时为 famicom
   变量含义：
     --page        页面背景
     --shell       机身外框（最外层边框和外圈）
     --shell-ring  机身外圈光晕
     --panel       面板底色
     --panel-hi    面板左上高光
     --key         按键底色
     --key-edge    按键边框
     --key-ink     按键上的文字
     --dpad-core   十字键中心凹陷
     --accent      强调色（图标选中、按钮、标题）
     --accent-ink  强调色上的文字
     --line        线框、下拉框下划线
     --text        面板内文字
     --muted       次要文字
     --warn / --warn-bg / --warn-ink  已修改的按键格
   ===================================================================== */
:root,
:root[data-theme="famicom"] {
  --page: #d9d4c7;
  --shell: #b3202a;
  --shell-ring: #8a8a8a;
  --panel: #ece7da;
  --panel-hi: #fbf8ef;
  --key: #2a2a2a;
  --key-edge: #101010;
  --key-ink: #ece7da;
  --dpad-core: #000;
  --accent: #b3202a;
  --accent-ink: #fbf8ef;
  --line: #b3202a;
  --text: #2a2a2a;
  --muted: #6b6b6b;
  --warn: #b3202a;
  --warn-bg: #f6d9d9;
  --warn-ink: #7e141c;
}

:root[data-theme="nes-gray"] {
  --page: #c9c9c9;
  --shell: #4a4a4a;
  --shell-ring: #8e8e8e;
  --panel: #cfcfcf;
  --panel-hi: #ececec;
  --key: #1f1f1f;
  --key-edge: #0a0a0a;
  --key-ink: #e0e0e0;
  --dpad-core: #000;
  --accent: #c0262d;
  --accent-ink: #ffffff;
  --line: #4a4a4a;
  --text: #222;
  --muted: #666;
  --warn: #c0262d;
  --warn-bg: #f1d3d4;
  --warn-ink: #7a1217;
}

:root[data-theme="mono"] {
  --page: #f1f1f1;
  --shell: #0d0d0d;
  --shell-ring: #5a5a5a;
  --panel: #e6e6e6;
  --panel-hi: #ffffff;
  --key: #fafafa;
  --key-edge: #1a1a1a;
  --key-ink: #0d0d0d;
  --dpad-core: #1a1a1a;
  --accent: #0d0d0d;
  --accent-ink: #ffffff;
  --line: #0d0d0d;
  --text: #0d0d0d;
  --muted: #666;
  --warn: #0d0d0d;
  --warn-bg: #d4d4d4;
  --warn-ink: #000;
}

:root[data-theme="night"] {
  --page: #0c0c0c;
  --shell: #1a1a1a;
  --shell-ring: #333;
  --panel: #262626;
  --panel-hi: #333;
  --key: #3a3a3a;
  --key-edge: #121212;
  --key-ink: #e8e8e8;
  --dpad-core: #000;
  --accent: #e0303a;
  --accent-ink: #ffffff;
  --line: #e0303a;
  --text: #e8e8e8;
  --muted: #9a9a9a;
  --warn: #e0303a;
  --warn-bg: #4a1c1f;
  --warn-ink: #ffc9cc;
}

:root[data-theme="classic"] {
  --page: #d0e7f9;
  --shell: #0071a2;
  --shell-ring: #999;
  --panel: #f8f1d7;
  --panel-hi: #fffef7;
  --key: #e5e3dd;
  --key-edge: #999;
  --key-ink: #0071a2;
  --dpad-core: #736a6d;
  --accent: #0071a2;
  --accent-ink: #f8f1d7;
  --line: rgb(0, 147, 143);
  --text: #0071a2;
  --muted: #555;
  --warn: #d9822b;
  --warn-bg: #ffeccc;
  --warn-ink: #a8530a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--page);
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

button { font-family: inherit; outline: 0; }

.main {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  height: 100%;
  max-width: 812px;
  max-height: 414px;
  margin: auto;
  padding: 10px;
  border-radius: 10px;
  background: var(--shell);
  box-shadow: 0 0 0 5px var(--shell), 0 0 0 20px var(--shell-ring);
}

.panel {
  position: relative;
  height: 100%;
  padding: 20px;
  border-radius: 15px;
  background: var(--panel);
  box-shadow: inset 8px 8px var(--panel-hi);
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) 150px;
  grid-template-areas: "dpad stage action";
  gap: 0 12px;
}

.dpad-area { grid-area: dpad; display: flex; align-items: center; justify-content: center; }
.action-area { grid-area: action; display: flex; align-items: center; justify-content: center; }
.stage { grid-area: stage; display: flex; flex-direction: column; min-width: 0; min-height: 0; }

/* ---------- 方向键 ---------- */
.controller {
  position: relative;
  width: 140px;
  height: 140px;
  touch-action: none;
  filter: drop-shadow(5px 5px 0 rgba(255, 255, 255, .8));
}

.controller button {
  position: absolute;
  z-index: 1;
  left: 50%; top: 50%;
  width: 56px; height: 56px;
  border: 8px solid var(--key-edge);
  border-radius: 15px;
  background: var(--key);
  color: transparent;
  transform: translate(-50%, -50%);
}

.controller::before {
  content: '';
  position: absolute;
  z-index: 0;
  pointer-events: none;
  left: 50%; top: 50%;
  width: 56px; height: 56px;
  background: var(--key);
  transform: translate(-50%, -50%);
}

.controller::after {
  content: '';
  position: absolute;
  z-index: 2;
  pointer-events: none;
  left: 50%; top: 50%;
  width: 42px; height: 42px;
  border: 8px solid var(--key-edge);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: inset 0 8px 0 0 var(--dpad-core), inset 0 -8px 0 0 rgba(255, 255, 255, .4);
}

.joydirection.up {
  top: 0;
  height: 50px;
  border-bottom: 0;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  transform: translate(-50%, 0);
  box-shadow: inset 0 8px 0 0 rgba(255, 255, 255, .5);
}

.joydirection.right {
  left: auto; right: 0;
  width: 50px;
  border-left: 0;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  transform: translate(0, -50%);
  box-shadow: inset 8px 0 0 0 var(--key), inset 6px 6px 0 0 rgba(255, 255, 255, .4), inset 8px -8px 0 0 rgba(0, 0, 0, .1);
}

.joydirection.down {
  top: auto; bottom: 0;
  height: 50px;
  border-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  transform: translate(-50%, 0);
  box-shadow: inset 0 -8px 0 0 rgba(0, 0, 0, .1);
}

.joydirection.left {
  left: 0;
  width: 50px;
  border-right: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  transform: translate(0, -50%);
  box-shadow: inset 0 8px 0 0 rgba(255, 255, 255, .4), inset -8px 0 0 0 var(--key), inset -8px -8px 0 0 rgba(0, 0, 0, .1);
}

.controller button.active_btn { opacity: .7; }

/* ---------- A / B ---------- */
.action { display: flex; touch-action: none; }

.action button {
  width: 56px; height: 56px;
  border: 8px solid var(--key-edge);
  border-radius: 50%;
  background: var(--key);
  color: var(--key-ink);
  box-shadow: 0 0 0 8px rgba(255, 255, 255, .6), inset 2px 5px 0 0 rgba(255, 255, 255, .2), inset -3px -6px 0 0 rgba(0, 0, 0, .1);
  transition: all 100ms;
  touch-action: none;
}

.action button:first-child { margin-right: 24px; }

.action button.active_btn {
  opacity: .9;
  box-shadow: 0 0 0 15px rgba(255, 255, 255, .5), inset 2px 5px 0 0 rgba(255, 255, 255, .2), inset -2px -5px 0 0 rgba(0, 0, 0, .1);
}

/* ---------- 屏幕 ---------- */
.screen {
  position: relative;
  flex: 1;
  min-height: 0;
  margin-bottom: 8px;
  border-radius: 10px;
  background: #000;
  overflow: hidden;
}

.screen canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tip {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  pointer-events: none;
  color: #fff;
  font-size: 14px;
  text-align: center;
}
.tip p { margin: 0; }
.tip.hidden { display: none; }

.toast {
  position: absolute;
  top: 8px;
  left: 50%;
  padding: 4px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, .65);
  color: #fff;
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%);
  transition: opacity .2s;
}
.toast.show { opacity: 1; }

/* ---------- 工具栏 ---------- */
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
}

#rom-select {
  flex: 1 1 80px;
  min-width: 0;
  height: 28px;
  padding-left: 3px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: none;
  color: var(--text);
  font-size: 12px;
}
#rom-select option, #rom-select optgroup { background: var(--panel); color: var(--text); }

.icons { display: flex; gap: 6px; }

.icon {
  width: 30px; height: 30px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: none;
  color: var(--line);
}
.icon svg {
  width: 18px; height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon.active-icon, .icon:active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.icon:not(.active-icon) .waves { display: none; }

.function {
  display: flex;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 50px;
  background: var(--accent);
  box-shadow: 3px 3px 0 rgba(255, 255, 255, .8);
}

.function button {
  height: 28px;
  padding: 0 6px;
  border: 5px solid var(--key-edge);
  border-radius: 12px;
  background: var(--key);
  color: var(--key-ink);
  font-size: 12px;
  line-height: 1;
  box-shadow: 0 0 0 5px rgba(255, 255, 255, .1), inset 3px 3px 0 0 rgba(255, 255, 255, .4);
  touch-action: none;
}
.function button.active_btn { opacity: .7; }

/* ---------- 弹出面板（按键设置） ---------- */
.dialog {
  position: fixed;
  left: 0; top: 0; right: 0; bottom: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: rgba(0, 0, 0, .45);
}
.dialog[hidden] { display: none; }

.dialog-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 440px;
  max-height: 100%;
  padding: 12px 16px;
  border: 5px solid var(--shell);
  border-radius: 14px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
}

.dialog-title {
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: bold;
  text-align: center;
}

.keys-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}

.keys-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 4px 3px;
  text-align: center;
}
.keys-table thead th { font-weight: bold; }
.keys-table tbody th { width: 22%; font-weight: normal; text-align: right; padding-right: 6px; }

.key-cell {
  display: block;
  width: 100%;
  min-height: 26px;
  padding: 2px 4px;
  border: 1px solid var(--key-edge);
  border-radius: 6px;
  background: var(--key);
  color: var(--key-ink);
  font-size: 12px;
  line-height: 1.2;
}
.key-cell small { display: block; font-size: 10px; opacity: .75; }
.key-cell.changed { border-color: var(--warn); background: var(--warn-bg); color: var(--warn-ink); }
.key-cell.listening { border-color: var(--accent); background: var(--accent); color: var(--accent-ink); }

.keys-shared {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 6px;
}
.keys-shared .key-cell { width: 110px; }

.keys-hint {
  min-height: 30px;
  margin: 6px 0;
  font-size: 11px;
  line-height: 1.4;
  color: var(--muted);
}

.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; }
.dialog-actions button {
  height: 30px;
  padding: 0 16px;
  border: 1px solid var(--accent);
  border-radius: 15px;
  background: none;
  color: var(--accent);
  font-size: 13px;
}
.dialog-actions button.primary { background: var(--accent); color: var(--accent-ink); }

@media screen and (max-height: 450px) {
  .dialog-card { padding: 8px 14px; }
  .dialog-title { margin-bottom: 2px; }
  .keys-table { border-spacing: 4px 2px; }
  .key-cell { min-height: 22px; padding: 1px 4px; }
  .keys-shared { margin-top: 4px; }
  .keys-hint { min-height: 0; margin: 4px 0; }
}

/* ---------- 竖屏 ---------- */
@media screen and (orientation: portrait) {
  .main {
    max-width: 560px;
    max-height: 100%;
  }

  .panel {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas: "stage stage" "dpad action";
    gap: 16px 0;
  }

  .screen {
    flex: none;
    aspect-ratio: 256 / 240;
  }

  .dpad-area { justify-content: flex-start; padding-left: 6px; }
  .action-area { justify-content: flex-end; padding-right: 14px; }
}

@media screen and (orientation: portrait) and (max-width: 600px) {
  .main {
    border-radius: 0;
    box-shadow: none;
  }
}

/* ---------- 全屏：只显示游戏画面，黑底，等比放到最大 ---------- */
html.is-fs,
html.is-fs body { background: #000; }

html.is-fs .main {
  position: fixed;
  left: 0; top: 0; right: 0; bottom: 0;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  background: #000;
}

html.is-fs .panel {
  display: block;
  padding: 0;
  border-radius: 0;
  box-shadow: none;
  background: #000;
}

html.is-fs .dpad-area,
html.is-fs .action-area,
html.is-fs .bar { display: none; }

html.is-fs .stage { height: 100%; }

html.is-fs .screen {
  flex: 1;
  margin: 0;
  border-radius: 0;
  aspect-ratio: auto;
}

html.is-fs .screen canvas {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 整数倍：1X … NX，居中显示，像素边缘保持锐利 */
html.is-fs.fs-int .screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

html.is-fs.fs-int .screen canvas {
  flex: none;
  width: calc(256px * var(--fs-n));
  height: calc(240px * var(--fs-n));
  image-rendering: pixelated;
}

/* 全屏缩放选择条：无操作 2.5 秒后淡出，鼠标移动或触摸时再出现 */
.fs-scale { display: none; }

html.is-fs .fs-scale {
  position: fixed;
  left: 50%;
  bottom: 14px;
  z-index: 50;
  display: flex;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 18px;
  background: rgba(0, 0, 0, .7);
  transform: translateX(-50%);
  transition: opacity .3s;
}

html.is-fs .fs-scale.idle { opacity: 0; pointer-events: none; }

.fs-scale button {
  min-width: 40px;
  height: 26px;
  padding: 0 8px;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: 13px;
  background: none;
  color: #ddd;
  font-size: 12px;
}

.fs-scale button.active {
  border-color: #fff;
  background: #fff;
  color: #000;
}