*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f0f13;
  --surface:   #1a1a24;
  --surface2:  #22222f;
  --border:    #2e2e42;
  --accent:    #8b5cf6;
  --accent2:   #a78bfa;
  --text:      #e2e2f0;
  --muted:     #7070a0;
  --glow:      rgba(139, 92, 246, 0.35);
}

html, body {
  height: 100%;
  font-family: "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ── scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── layout ── */
.page {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ── header ── */
header {
  text-align: center;
  padding: 12px 0 4px;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #c4b5fd 0%, #8b5cf6 50%, #6d28d9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(0 0 18px var(--glow));
}

header p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.88rem;
  font-family: "Noto Sans SC", sans-serif;
  letter-spacing: 0.04em;
}

/* ── card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label.field-label {
  font-size: 0.8rem;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── textarea ── */
#input-text {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.8;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#input-text::placeholder { color: var(--muted); }

#input-text:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

/* ── style buttons ── */
.style-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.style-btn {
  flex: 1;
  min-width: 80px;
  padding: 10px 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.18s;
  text-align: center;
}

.style-btn:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.style-btn.active {
  background: linear-gradient(135deg, #6d28d9, #8b5cf6);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 14px var(--glow);
}

/* ── slider ── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

#length-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

#length-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

#length-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 16px var(--glow);
}

#length-display {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.88rem;
  color: var(--accent2);
  min-width: 52px;
  text-align: right;
}

/* ── submit button ── */
#submit-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #6d28d9 0%, #8b5cf6 100%);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  box-shadow: 0 4px 20px var(--glow);
  transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
}

#submit-btn:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 28px var(--glow);
}

#submit-btn:active:not(:disabled) { transform: translateY(0); }

#submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── output ── */
#output-card {
  display: none;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.output-title {
  font-size: 0.8rem;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

#copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.78rem;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.2s;
}

#copy-btn:hover { border-color: var(--accent2); color: var(--accent2); }

#output-text {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  font-size: 1rem;
  line-height: 2;
  min-height: 120px;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text);
  position: relative;
}

/* blinking cursor */
#output-text::after {
  content: "▋";
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
  display: inline;
}

#output-text.done::after { display: none; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ── error ── */
.error-msg {
  color: #f87171;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.88rem;
  padding: 10px 14px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: 8px;
  display: none;
}

/* ── pro-only 显隐 ── */
.pro-only { display: none !important; }
:root.pro-theme .pro-only { display: revert !important; }
:root.pro-theme .style-group { display: none; }

/* ── pro 平台+类型同行容器 ── */
.style-genre-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.style-genre-divider {
  width: 1px;
  height: 44px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── pro 风格卡片 ── */
.style-cards {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.style-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
  overflow: hidden;
}

.style-card:hover {
  border-color: var(--accent2);
  color: var(--text);
  box-shadow: 0 0 12px var(--glow);
}

.style-card.active {
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 16px var(--glow);
  background: linear-gradient(135deg, rgba(109,40,217,0.18), rgba(139,92,246,0.1));
}

:root.pro-theme .style-card.active {
  background: linear-gradient(135deg, rgba(146,64,14,0.2), rgba(217,119,6,0.1));
}

/* ── 类型行 ── */
.genre-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.genre-btn {
  padding: 7px 18px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.18s;
}

.genre-btn:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

.genre-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(139, 92, 246, 0.12);
}

:root.pro-theme .genre-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(217, 119, 6, 0.12);
}

.card-icon { font-size: 1.4rem; flex-shrink: 0; }

.card-name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.card-sub {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

/* hover 时从底部滑入的说明文字 */
.card-desc {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  transform: translateY(100%);
  transition: transform 0.22s ease;
}

:root.pro-theme .card-desc { background: var(--accent); }

.style-card:hover .card-desc { transform: translateY(0); }

/* ── 输出区操作按钮组 ── */
.output-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ── 分享图按钮 ── */
#share-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #6d28d9 0%, #8b5cf6 100%);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: 0 4px 20px var(--glow);
  transition: opacity 0.2s, transform 0.15s;
}

#share-btn:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

:root.pro-theme #share-btn {
  background: linear-gradient(135deg, #92400e 0%, #d97706 100%);
}

/* ── 重新生成按钮 ── */
#regen-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.78rem;
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.2s;
}

#regen-btn:hover:not(:disabled) { border-color: var(--accent2); color: var(--accent2); }
#regen-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── 质量检测标签 ── */
#quality-badge {
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 6px;
  letter-spacing: 0.03em;
  align-self: flex-start;
}

#quality-badge.badge-ok {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.35);
  color: #34d399;
}

#quality-badge.badge-warn {
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: #fbbf24;
}

/* ── pro 主题色变量 ── */
:root.pro-theme {
  --bg:      #0c0a07;
  --surface: #18140e;
  --surface2: #201c14;
  --border:  #3d3020;
  --accent:  #d97706;
  --accent2: #f59e0b;
  --text:    #f0ead8;
  --muted:   #8a7a55;
  --glow:    rgba(217, 119, 6, 0.4);
}

:root.pro-theme header h1 {
  background: linear-gradient(135deg, #fde68a 0%, #d97706 50%, #92400e 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

:root.pro-theme #submit-btn {
  background: linear-gradient(135deg, #92400e 0%, #d97706 100%);
}

:root.pro-theme .style-btn.active {
  background: linear-gradient(135deg, #92400e, #d97706);
}

/* ── pro 切换按钮 ── */
#pro-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  padding: 7px 16px;
  background: rgba(15, 15, 20, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

#pro-toggle:hover {
  border-color: var(--accent2);
  color: var(--accent2);
}

/* ── 涟漪遮罩（从右上扩散到左下）── */
.pro-ripple {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  /* 圆心锚定在按钮附近（右上）*/
  clip-path: circle(0% at calc(100% - 60px) 40px);
  transition: clip-path 0.85s cubic-bezier(0.4, 0, 0.2, 1);
}

.pro-ripple.expanding {
  /* 半径足够大以覆盖左下角 */
  clip-path: circle(200% at calc(100% - 60px) 40px);
}

/* ── footer ── */
footer {
  text-align: center;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.75rem;
  opacity: 0.5;
}