:root {
  --ink: #1c2a33;
  --muted: #5c6b75;
  --line: rgba(28, 42, 51, 0.12);
  --paper: #f3f7f8;
  --panel: #ffffff;
  --accent: #0f7a6c;
  --accent-deep: #0a5a50;
  --accent-soft: #d8efe9;
  --warn: #b45309;
  --shadow: 0 18px 50px rgba(28, 42, 51, 0.08);
  --radius: 18px;
  --font-ui: "DM Sans", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-display: "ZCOOL XiaoWei", "Songti SC", serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--font-ui);
  background:
    radial-gradient(900px 500px at 10% -10%, #dff3ee 0%, transparent 55%),
    radial-gradient(700px 420px at 100% 0%, #e7eef5 0%, transparent 50%),
    linear-gradient(180deg, #eef4f5 0%, var(--paper) 40%, #e8eef0 100%);
}

.app {
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  min-height: 100vh;
  gap: 0;
}

.panel {
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--line);
  padding: 28px 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(145deg, var(--accent) 0%, #1a9b88 55%, #2a6f8f 100%);
  box-shadow: 0 10px 24px rgba(15, 122, 108, 0.28);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: 0.04em;
}

.brand-sub {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.cost-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: linear-gradient(180deg, #f4faf8 0%, #ffffff 100%);
}

.cost-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cost-label {
  font-size: 12px;
  color: var(--muted);
}

.cost-value {
  margin-top: 2px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.cost-value.accent {
  color: var(--accent-deep);
}

.cost-meta {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.cost-last {
  margin-top: 6px;
  font-size: 12px;
  color: var(--ink);
  line-height: 1.4;
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0;
  padding: 0;
}

.step {
  font-size: 12px;
  text-align: center;
  padding: 8px 6px;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(28, 42, 51, 0.04);
  border: 1px solid transparent;
}

.step.is-active {
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-color: rgba(15, 122, 108, 0.2);
  font-weight: 700;
}

.step.is-done {
  color: var(--ink);
  background: rgba(15, 122, 108, 0.08);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.field input:not([type="radio"]):not([type="checkbox"]),
.field select {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:not([type="radio"]):not([type="checkbox"]):focus,
.field select:focus {
  outline: none;
  border-color: rgba(15, 122, 108, 0.55);
  box-shadow: 0 0 0 3px rgba(15, 122, 108, 0.12);
}

.gender {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 0;
  padding: 8px 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.gender legend {
  padding: 0 4px;
  font-size: 13px;
  color: var(--muted);
}

.gender-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.gender-option {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  cursor: pointer;
}

.gender-option input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}

.gender-option span {
  display: block;
  width: 100%;
  text-align: center;
  padding: 10px 8px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.gender-option input:focus-visible + span {
  box-shadow: 0 0 0 3px rgba(15, 122, 108, 0.12);
}

.gender-option input:checked + span {
  background: var(--accent-soft);
  border-color: rgba(15, 122, 108, 0.45);
  color: var(--accent-deep);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 10px;
  margin-top: 4px;
}

.btn {
  border: none;
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn.primary {
  color: #fff;
  background: linear-gradient(180deg, #149987 0%, var(--accent) 100%);
  box-shadow: 0 10px 20px rgba(15, 122, 108, 0.22);
}

.btn.primary:hover:not(:disabled) {
  background: linear-gradient(180deg, #18a994 0%, var(--accent-deep) 100%);
}

.btn.ghost {
  color: var(--ink);
  background: rgba(28, 42, 51, 0.05);
  border: 1px solid var(--line);
}

.btn.wide { width: 100%; }
.btn.small { padding: 8px 12px; font-size: 13px; text-decoration: none; display: inline-flex; }

.export-bar {
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.export-hint {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.music-box {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: linear-gradient(180deg, #f7fbfb 0%, #ffffff 100%);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.music-head {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.music-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.music-sub {
  font-size: 12px;
  color: var(--muted);
}

.music-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.music-player {
  width: 100%;
  height: 36px;
}

.status {
  min-height: 1.2em;
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.status.is-error { color: #b42318; }
.status.is-ok { color: var(--accent-deep); }

.preview-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px 22px 22px;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 14px;
}

.preview-title {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.03em;
}

.preview-meta {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.preview-frame-wrap,
.preview-frame {
  flex: 1;
  min-height: 0;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

/* display:grid 会盖过原生 [hidden]，必须显式隐藏 */
.preview-frame-wrap[hidden],
.preview-frame[hidden],
.export-bar[hidden],
.music-player[hidden],
#btnOpen[hidden],
#btnMusicDl[hidden] {
  display: none !important;
}

.preview-frame {
  border: 1px solid var(--line);
  display: block;
  background: #f7f8f9;
}

.preview-frame-wrap {
  display: grid;
  place-items: center;
  padding: 40px 28px;
}

.empty {
  max-width: 420px;
  text-align: center;
}

.empty-title {
  font-family: var(--font-display);
  font-size: 28px;
  margin-bottom: 10px;
}

.empty p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 960px) {
  .app {
    grid-template-columns: 1fr;
  }

  .panel {
    border-right: none;
    border-bottom: 1px solid var(--line);
    max-height: none;
  }

  .preview-pane {
    min-height: 70vh;
  }

  .preview-frame,
  .preview-frame-wrap {
    min-height: 70vh;
  }
}

@media (max-width: 560px) {
  .field-row {
    grid-template-columns: 1fr;
  }

  .actions {
    grid-template-columns: 1fr;
  }
}