/* ═══════════════════════════════════════════════════════
   DATA TRANSLATOR · 工程仪器面板风格
   暗色仪表盘 / CRT 琥珀信号 / 数据工坊
   ═══════════════════════════════════════════════════════ */

:root {
  /* 品牌色调：暖琥珀偏橙，替代 AI 常见的深蓝紫渐变 */
  --amber: oklch(0.82 0.13 75);
  --amber-dim: oklch(0.70 0.10 75);
  --signal: oklch(0.80 0.14 135);
  --signal-dim: oklch(0.62 0.10 135);
  --danger: oklch(0.70 0.18 25);

  /* 表面：炭色带轻微暖色 tint（而非纯灰） */
  --bg-0: oklch(0.135 0.012 70);
  --bg-1: oklch(0.175 0.015 70);
  --bg-2: oklch(0.215 0.018 70);
  --bg-3: oklch(0.255 0.020 70);

  /* 文字 */
  --ink-hi: oklch(0.93 0.02 75);
  --ink-mid: oklch(0.78 0.02 75);
  --ink-low: oklch(0.60 0.02 75);

  --font-disp: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Mono", "Consolas", monospace;

  --shadow-1: 0 1px 2px oklch(0 0 0 / 0.35), 0 4px 12px oklch(0 0 0 / 0.25);
  --shadow-2: 0 2px 4px oklch(0 0 0 / 0.4), 0 14px 32px oklch(0 0 0 / 0.35);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-disp);
  color: var(--ink-hi);
  background:
    radial-gradient(1200px 500px at 85% -10%, oklch(0.30 0.05 75 / 0.35), transparent 60%),
    radial-gradient(900px 420px at 0% 110%, oklch(0.24 0.05 135 / 0.22), transparent 55%),
    var(--bg-0);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  display: flex;
  justify-content: center;
}

.app-shell {
  width: min(1180px, 100% - clamp(16px, 4vw, 48px));
  padding-block: clamp(24px, 5vh, 56px);
}

/* ────────── 顶栏 ────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(24px, 4vh, 40px);
}

.brand { display: flex; align-items: center; gap: 16px; }

.brand-mark {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  background: var(--bg-2);
  color: var(--amber);
  font-size: 26px;
  box-shadow: var(--shadow-1);
  position: relative;
  flex-shrink: 0;
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid oklch(0.82 0.13 75 / 0.35);
  pointer-events: none;
}
.brand-glyph { font-weight: 500; }

.brand-title {
  margin: 0;
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-hi);
}
.brand-sub {
  margin: 3px 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--ink-low);
  font-family: var(--font-mono);
}

.sys-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-mid);
  padding: 8px 14px;
  background: var(--bg-1);
  box-shadow: var(--shadow-1);
}
.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 0 oklch(0.80 0.14 135 / 0.5);
  animation: pulse 2.4s var(--ease-out) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 oklch(0.80 0.14 135 / 0.45); }
  70% { box-shadow: 0 0 0 8px oklch(0.80 0.14 135 / 0); }
  100% { box-shadow: 0 0 0 0 oklch(0.80 0.14 135 / 0); }
}
.status-note { color: var(--ink-low); }

/* ────────── 工具导航 ────────── */
.toolnav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid oklch(0.93 0.02 75 / 0.10);
  margin-bottom: clamp(20px, 3vh, 32px);
  overflow-x: auto;
}
.toolnav-item {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-low);
  font-family: var(--font-disp);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 14px 18px 12px;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.18s var(--ease-out);
}
.toolnav-item::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: -1px;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-out);
}
.toolnav-item:hover { color: var(--ink-hi); }
.toolnav-item:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.toolnav-item.is-active { color: var(--amber); }
.toolnav-item.is-active::after { transform: scaleX(1); }
.toolnav-code {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--ink-low);
  margin-right: 6px;
  vertical-align: 1px;
}
.toolnav-item.is-active .toolnav-code { color: var(--amber-dim); }

/* ────────── 面板 ────────── */
.panel { display: none; }
.panel.is-active { display: block; animation: rise 0.35s var(--ease-out); }
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-head { margin-bottom: 22px; }
.panel-title {
  margin: 0 0 6px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-hi);
}
.panel-desc {
  margin: 0;
  color: var(--ink-mid);
  font-size: 0.92rem;
  max-width: 60ch;
  line-height: 1.6;
}

/* ────────── 控制行 ────────── */
.ctrl-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.ctrl-side {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* 分段按钮 */
.seg {
  display: inline-flex;
  background: var(--bg-1);
  box-shadow: var(--shadow-1);
  padding: 4px;
  gap: 4px;
}
.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-low);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 9px 16px;
  cursor: pointer;
  transition: all 0.18s var(--ease-out);
}
.seg-btn:hover { color: var(--ink-hi); }
.seg-btn:focus-visible { outline: 2px solid var(--amber); outline-offset: 1px; }
.seg-btn.is-active {
  background: var(--amber);
  color: oklch(0.16 0.02 75);
}

/* 开关 */
.switch-line {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  user-select: none;
}
.switch-line input { position: absolute; opacity: 0; pointer-events: none; }
.switch {
  width: 38px; height: 21px;
  background: var(--bg-3);
  border-radius: 20px;
  position: relative;
  transition: background 0.2s var(--ease-out);
  flex-shrink: 0;
}
.switch::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--ink-low);
  transition: transform 0.2s var(--ease-out), background 0.2s var(--ease-out);
}
.switch-line input:checked + .switch { background: var(--amber-dim); }
.switch-line input:checked + .switch::after { transform: translateX(17px); background: oklch(0.16 0.02 75); }
.switch-line input:focus-visible + .switch { outline: 2px solid var(--amber); outline-offset: 2px; }
.switch-label {
  font-size: 0.8rem;
  color: var(--ink-mid);
  letter-spacing: 0.03em;
}

.char-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-low);
  letter-spacing: 0.05em;
}

/* ────────── 输入输出网格 ────────── */
.xfer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 18px;
}
@media (max-width: 760px) {
  .xfer-grid { grid-template-columns: 1fr; }
}

.field { min-width: 0; }

.field-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--amber-dim);
  margin-bottom: 7px;
}

.code-area {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  background: var(--bg-1);
  color: var(--ink-hi);
  border: 1px solid oklch(0.93 0.02 75 / 0.08);
  box-shadow: var(--shadow-1);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.65;
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.code-area:focus {
  outline: none;
  border-color: oklch(0.82 0.13 75 / 0.5);
  box-shadow: var(--shadow-1), 0 0 0 3px oklch(0.82 0.13 75 / 0.12);
}
.code-area[readonly] { color: var(--ink-mid); }

.code-area::placeholder { color: var(--ink-low); opacity: 0.6; }

/* ────────── 操作按钮 ────────── */
.action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  appearance: none;
  border: 0;
  background: var(--amber);
  color: oklch(0.16 0.02 75);
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 11px 20px;
  cursor: pointer;
  min-height: 44px;
  box-shadow: var(--shadow-1);
  transition: transform 0.12s var(--ease-out), background 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out);
}
.btn:hover { background: oklch(0.86 0.12 75); box-shadow: var(--shadow-2); }
.btn:active { transform: translateY(1px) scale(0.99); }
.btn:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-ghost {
  background: transparent;
  color: var(--ink-mid);
  border: 1px solid oklch(0.93 0.02 75 / 0.15);
  box-shadow: none;
}
.btn-ghost:hover { color: var(--ink-hi); background: var(--bg-2); box-shadow: none; }

/* ────────── Hash 面板 ────────── */
.hash-out {
  margin: 18px 0;
  background: var(--bg-1);
  box-shadow: var(--shadow-1);
  border: 1px solid oklch(0.93 0.02 75 / 0.08);
  overflow: hidden;
}
.hash-empty {
  padding: 34px 20px;
  color: var(--ink-low);
  font-size: 0.88rem;
  text-align: center;
  letter-spacing: 0.02em;
}
.hash-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  align-items: start;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid oklch(0.93 0.02 75 / 0.07);
  transition: background 0.15s var(--ease-out);
}
.hash-row:last-child { border-bottom: 0; }
.hash-row:hover { background: var(--bg-2); }
.hash-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--signal-dim);
  padding-top: 3px;
  word-break: keep-all;
}
.hash-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-hi);
  word-break: break-all;
  line-height: 1.6;
}

/* ────────── 二维码面板 ────────── */
.qr-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
}
@media (max-width: 760px) {
  .qr-layout { grid-template-columns: 1fr; }
}
.qr-input-field .code-area { min-height: 180px; }

.qr-options {
  display: flex;
  gap: 16px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.opt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--ink-mid);
  letter-spacing: 0.03em;
}
.opt select {
  appearance: none;
  background: var(--bg-2);
  border: 1px solid oklch(0.93 0.02 75 / 0.12);
  color: var(--ink-hi);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 30px 8px 12px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23c9b58a' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.opt select:focus-visible { outline: 2px solid var(--amber); outline-offset: 1px; }

.qr-output { min-width: 0; }
.qr-canvas-wrap {
  background: var(--bg-1);
  box-shadow: var(--shadow-1);
  border: 1px solid oklch(0.93 0.02 75 / 0.08);
  min-height: 320px;
  display: grid;
  place-items: center;
  padding: 16px;
}
.qr-canvas-wrap img {
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
}
.qr-empty {
  color: var(--ink-low);
  font-size: 0.88rem;
  text-align: center;
  padding: 40px 20px;
}
.qr-output .action-row { margin-top: 14px; }

/* ────────── 页脚 ────────── */
.foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: clamp(36px, 6vh, 56px);
  color: var(--ink-low);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-align: center;
}
.foot-led {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal-dim);
  box-shadow: 0 0 6px oklch(0.62 0.10 135 / 0.6);
}

/* ────────── Toast ────────── */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 20px);
  background: var(--bg-2);
  color: var(--ink-hi);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 12px 22px;
  box-shadow: var(--shadow-2);
  border-left: 3px solid var(--signal);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
  z-index: 50;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.err { border-left-color: var(--danger); }

/* ────────── 可访问性：减弱动效 ────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}