/* ===== 蓝白简约扁平化设计令牌 ===== */
:root {
  --bg: #f5f8ff;
  --bg-soft: #eef5ff;
  --panel: #ffffff;
  --panel-2: #f8fbff;
  --panel-3: #eef6ff;
  --border: #d9e6f7;
  --border-soft: #e7effa;
  --text: #172033;
  --muted: #64748b;
  --faint: #94a3b8;

  --accent: #2563eb;
  --accent-2: #1d4ed8;
  --accent-soft: #dbeafe;
  --accent-faint: #eff6ff;

  --c-min: #0ea5e9;
  --c-obf: #2563eb;
  --c-pack: #1d4ed8;
  --c-ok: #16a34a;
  --c-warn: #d97706;
  --c-err: #dc2626;

  --mono: "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Roboto Mono", Menlo, monospace;
  --sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;

  --radius: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 16px 40px rgba(30, 64, 175, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    linear-gradient(180deg, rgba(219, 234, 254, 0.9) 0%, rgba(245, 248, 255, 0.9) 340px),
    var(--bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

.app {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 42px;
}

/* ===== 顶部 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 2px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1px;
}

.brand-name {
  font-family: var(--mono);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.3px;
}

.brand-sub {
  margin-top: 2px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 1px;
}

.topbar-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(22, 163, 74, 0.18);
  background: #f0fdf4;
  color: var(--c-ok);
  font-family: var(--mono);
  font-size: 12px;
  text-decoration: none;
}

.topbar-link.off {
  border-color: rgba(220, 38, 38, 0.16);
  background: #fef2f2;
  color: var(--c-err);
}

/* ===== Hero ===== */
.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin: 4px 0 18px;
  padding: 26px;
  background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -1px;
}

.hero-desc {
  max-width: 640px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.hero-card {
  flex: 0 0 auto;
  min-width: 178px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
}

.hero-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.hero-card strong {
  display: block;
  margin-top: 5px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 14px;
}

/* ===== 流水线 ===== */
.pipeline {
  display: flex;
  align-items: stretch;
  gap: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
  overflow-x: auto;
  box-shadow: 0 10px 24px rgba(30, 64, 175, 0.05);
}

.stage {
  flex: 1 1 0;
  min-width: 84px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  opacity: 0.42;
  transition: opacity 0.2s ease;
}

.stage.active { opacity: 1; }
.stage.skipped { opacity: 0.24; }

.stage-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--faint);
  transition: background 0.2s;
}

.stage[data-stage="original"].active .stage-dot { background: var(--muted); }
.stage[data-stage="min"].active .stage-dot { background: var(--c-min); }
.stage[data-stage="obf"].active .stage-dot { background: var(--c-obf); }
.stage[data-stage="pack"].active .stage-dot { background: var(--c-pack); }

.stage-name {
  font-size: 13px;
  color: var(--muted);
}

.stage.active .stage-name {
  color: var(--text);
  font-weight: 700;
}

.stage-size {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}

.stage.active .stage-size { color: var(--accent); }

.stage-arrow {
  display: flex;
  align-items: center;
  color: #b7c6da;
  font-family: var(--mono);
  font-size: 18px;
}

/* ===== 主布局 ===== */
.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-head-tight {
  margin-top: 16px;
  margin-bottom: 8px;
}

.panel-title {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1.8px;
  text-transform: uppercase;
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===== 按钮 ===== */
.btn {
  min-height: 34px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  padding: 7px 13px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.05s;
}

.btn:hover {
  border-color: #bcd0ec;
  background: var(--panel-2);
}

.btn:active { transform: translateY(1px); }

.btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
}

.btn-ghost:hover {
  color: var(--accent);
  background: var(--accent-faint);
  border-color: #bfd4f4;
}

.btn-soft {
  flex: 0 0 auto;
  background: var(--accent-faint);
  color: var(--accent);
  border-color: #bfd4f4;
  font-weight: 700;
}

.btn-soft:hover {
  background: var(--accent-soft);
  color: var(--accent-2);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 800;
}

.btn-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
}

.btn-build {
  width: 100%;
  min-height: 44px;
  margin-top: 16px;
  font-size: 15px;
}

/* ===== 拖拽上传 + 代码输入 ===== */
.drop-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border: 1px dashed #b8cef0;
  border-radius: var(--radius-md);
  background: var(--panel-2);
  transition: border-color 0.18s, background 0.18s, box-shadow 0.18s;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: #eff6ff;
  box-shadow: inset 0 0 0 2px rgba(37, 99, 235, 0.12);
}

.drop-zone.drag-over::after {
  content: "松开鼠标即可上传";
  position: absolute;
  inset: 14px;
  z-index: 3;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: rgba(239, 246, 255, 0.88);
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.5px;
  pointer-events: none;
}

.drop-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.drop-icon {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 22px;
  font-weight: 800;
}

.drop-copy {
  min-width: 0;
  flex: 1;
}

.drop-copy strong {
  display: block;
  color: var(--text);
  font-size: 14px;
}

.drop-copy span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.code-area {
  width: 100%;
  min-height: 238px;
  resize: vertical;
  background: #ffffff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 13px 14px;
  outline: none;
  tab-size: 2;
}

.code-area:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.10);
}

.code-area::placeholder { color: var(--faint); }

/* ===== 流程开关 ===== */
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.chk {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  cursor: pointer;
  user-select: none;
}

.chk input {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
}

.chk-warn {
  align-items: flex-start;
  color: var(--c-warn);
  margin-top: 12px;
}

/* ===== 高级参数 ===== */
.adv {
  margin-top: 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: var(--panel-2);
  padding: 4px 12px;
}

.adv summary {
  cursor: pointer;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  padding: 9px 2px;
  list-style: none;
}

.adv summary::-webkit-details-marker { display: none; }
.adv summary::before { content: "▸ "; color: var(--faint); }
.adv[open] summary::before { content: "▾ "; }

.adv-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  padding: 7px 2px 12px;
}

.adv-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.adv-label {
  color: var(--muted);
  font-size: 13px;
}

.adv select,
.adv input[type="number"] {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 12px;
  outline: none;
}

.adv input[type="number"] { width: 68px; }

.adv select:focus,
.adv input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.10);
}

.warn-text {
  margin: 4px 2px 10px;
  color: var(--c-warn);
  font-size: 12px;
  line-height: 1.5;
}

.hint {
  margin: 10px 2px 0;
  color: var(--muted);
  font-size: 12px;
}

.hint.err { color: var(--c-err); }

/* ===== 输出 tabs ===== */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tab {
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  padding: 5px 11px;
}

.tab:hover {
  color: var(--accent);
  background: var(--accent-faint);
}

.tab.active {
  color: var(--accent);
  border-color: #bfd4f4;
  background: var(--accent-soft);
}

.tab[data-key="min"].active { color: var(--c-min); }
.tab[data-key="obf"].active { color: var(--c-obf); }
.tab[data-key="pack"].active { color: var(--c-pack); }

/* ===== 输出区 ===== */
.output-wrap {
  flex: 1;
  min-height: 238px;
  display: flex;
}

.code-out {
  flex: 1;
  min-width: 0;
  max-height: 478px;
  margin: 0;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
  background: #ffffff;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  padding: 13px 14px;
}

.placeholder { color: var(--faint); }

.out-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
}

.out-stat {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
}

.out-stat .ok { color: var(--c-ok); }

.out-actions {
  display: flex;
  gap: 8px;
}

/* ===== 页脚 ===== */
.foot {
  margin-top: 26px;
  color: var(--muted);
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
}

.foot-sep {
  margin: 0 8px;
  opacity: 0.5;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 50;
  transform: translateX(-50%);
  min-width: 180px;
  max-width: calc(100vw - 32px);
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #ffffff;
  color: var(--text);
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.14);
  font-size: 13px;
  text-align: center;
}

.toast.err {
  border-color: rgba(220, 38, 38, 0.2);
  background: #fef2f2;
  color: var(--c-err);
}

.toast.ok {
  border-color: rgba(22, 163, 74, 0.22);
  background: #f0fdf4;
  color: var(--c-ok);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .hero { align-items: flex-start; flex-direction: column; }
  .hero-card { width: 100%; }
  .code-out { max-height: 360px; }
}

@media (max-width: 620px) {
  .app { padding: 0 14px 34px; }

  .topbar {
    align-items: flex-start;
    gap: 12px;
    flex-direction: column;
  }

  .hero { padding: 20px; }

  .panel {
    padding: 14px;
    border-radius: 14px;
  }

  .panel-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .drop-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .btn-soft {
    width: 100%;
    text-align: center;
  }

  .out-foot {
    align-items: stretch;
    flex-direction: column;
  }

  .out-actions .btn {
    flex: 1;
  }
}

/* 可访问性：焦点可见 */
.btn:focus-visible,
.tab:focus-visible,
.code-area:focus-visible,
.adv summary:focus-visible,
.adv select:focus-visible,
.adv input[type="number"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}