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

:root {
  --bg: #0f0f1a;
  --card: #1a1a2e;
  --card-border: #2a2a4a;
  --text: #e0e0e0;
  --text-secondary: #8888a0;
  --accent: #e94560;
  --accent-soft: #ff6b6b;
  --gentle: #ff9f9f;
  --direct: #ffd93d;
  --poetic: #a29bfe;
  --success: #00d9a5;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  line-height: 1.6;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 16px 48px;
}

/* 用户栏暗色适配 */
.page .user-bar {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  margin-bottom: 16px;
  color: var(--text);
}
.page .user-bar-info { color: var(--text-secondary); }
.page .user-bar-info strong { color: var(--text); }
.page .btn-ghost {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--card-border);
  color: var(--text);
}
.page .auth-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text);
}
.page .auth-card input {
  background: #0f0f1a;
  border-color: var(--card-border);
  color: var(--text);
}
.page .btn-link { color: var(--text-secondary); }

.container {
  max-width: none;
  margin: 0;
  padding: 0;
}

.workspace {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.main-col {
  flex: 1;
  min-width: 0;
}

/* 历史侧栏 */
.history-sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
}

.history-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--card-border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.history-sidebar-header button {
  padding: 4px 10px;
  font-size: 12px;
  background: rgba(233, 69, 96, 0.15);
  border: none;
  border-radius: 8px;
  color: var(--accent-soft);
  cursor: pointer;
}

.conv-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  min-height: 160px;
  max-height: 420px;
}

.conv-item {
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 4px;
  transition: background 0.15s;
}

.conv-item:hover { background: rgba(255,255,255,0.05); }
.conv-item.active {
  background: rgba(233, 69, 96, 0.12);
  border: 1px solid rgba(233, 69, 96, 0.25);
}

.conv-item-title {
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-item-time {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.conv-empty, .history-tip {
  padding: 16px 12px;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.history-tip {
  border-top: 1px solid var(--card-border);
  margin: 0;
}

.conv-load-more {
  padding: 10px;
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
}
.conv-load-more.hidden { display: none; }

/* 对话区 */
.chat-panel {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  margin-bottom: 20px;
  overflow: hidden;
}

.chat-messages {
  max-height: 360px;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.chat-empty, .chat-loading {
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 32px 16px;
  line-height: 1.6;
}

.chat-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.chat-loading .spinner {
  border-color: rgba(233,69,96,0.2);
  border-top-color: var(--accent);
}

.msg {
  max-width: 88%;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg-user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg-ai {
  align-self: flex-start;
  background: #0f0f1a;
  border: 1px solid var(--card-border);
  border-bottom-left-radius: 4px;
}

.stream-cursor {
  display: inline-block;
  color: var(--accent);
  animation: blink 0.9s step-end infinite;
  margin-left: 2px;
}

/* 等待动画 — 三点跳动 */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.35; }
  30% { transform: translateY(-7px); opacity: 1; }
}

.header {
  text-align: center;
  margin-bottom: 32px;
  padding-top: 20px;
}

.header h1 {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #ff6b6b 0%, #a29bfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.header p { color: var(--text-secondary); font-size: 14px; }

.form-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 20px;
}

.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
}

.form-label span {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 12px;
  margin-left: 6px;
}

textarea, input[type="text"], select {
  width: 100%;
  background: #0f0f1a;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
  font-family: inherit;
  resize: vertical;
}

textarea:focus, input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

textarea { min-height: 80px; }

.style-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.style-option {
  background: #0f0f1a;
  border: 2px solid var(--card-border);
  border-radius: 14px;
  padding: 16px 8px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.style-option:hover { border-color: #444; transform: translateY(-2px); }
.style-option.active {
  border-color: var(--accent);
  background: rgba(233, 69, 96, 0.08);
}

.style-option .icon { font-size: 28px; margin-bottom: 6px; display: block; }
.style-option .name { font-size: 13px; font-weight: 600; }
.style-option .desc { font-size: 11px; color: var(--text-secondary); margin-top: 2px; }
.style-option input { display: none; }

.tone-container {
  background: #0f0f1a;
  border-radius: 12px;
  padding: 16px;
}

.tone-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.tone-value {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  transition: color 0.2s;
}

input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--gentle), var(--direct), #888);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  border: 2px solid var(--accent);
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

/* 快捷点选 chips */
.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.chip-grid--scene .chip {
  font-size: 12px;
  padding: 8px 12px;
}

.chip {
  appearance: none;
  border: 1.5px solid var(--card-border);
  background: #0f0f1a;
  color: var(--text-secondary);
  border-radius: 980px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.chip:hover {
  border-color: #555;
  color: var(--text);
}

.chip.active {
  border-color: var(--accent);
  background: rgba(233, 69, 96, 0.12);
  color: #ffb4c0;
}

.chip.active.scene-chip {
  border-color: var(--poetic);
  background: rgba(162, 155, 254, 0.12);
  color: var(--poetic);
}

.custom-input {
  width: 100%;
  background: #0f0f1a;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 11px 14px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s;
}

.custom-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

.custom-input.hidden { display: none; }

.scene-option {
  background: #0f0f1a;
  border: 1.5px solid var(--card-border);
  border-radius: 10px;
  padding: 10px;
  text-align: center;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.scene-option:hover { border-color: #555; }
.scene-option.active {
  border-color: var(--poetic);
  background: rgba(162, 155, 254, 0.08);
  color: var(--poetic);
}
.scene-option input { display: none; }

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-soft) 100%);
  color: white;
  border: none;
  border-radius: 14px;
  padding: 16px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}

.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(233, 69, 96, 0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.result-section {
  display: none;
  animation: fadeIn 0.5s ease;
}
.result-section.show { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: left;
}

.section-toggle-title {
  font-size: 18px;
  font-weight: 700;
}

.section-toggle-hint {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.section-toggle:hover .section-toggle-hint {
  color: var(--accent-soft);
}

.chat-panel.hidden {
  display: none;
}

.text-result {
  background: #0f0f1a;
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 20px;
  position: relative;
  min-height: 120px;
}

.text-result-edit {
  width: 100%;
  min-height: 160px;
  padding-right: 56px;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
  font-family: inherit;
  resize: vertical;
  outline: none;
}

.text-result-edit:focus {
  outline: none;
}

.text-result-edit:read-only {
  color: var(--text-secondary);
  cursor: default;
}

.text-result-edit::placeholder {
  color: var(--text-secondary);
}

.text-result.streaming .text-result-edit:read-only::after {
  content: none;
}

@keyframes blink { 50% { opacity: 0; } }

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--card);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); }

.refine-box {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 20px;
}

.refine-box label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.refine-row {
  display: flex;
  gap: 10px;
}

.refine-row textarea {
  flex: 1;
  min-height: 44px;
  max-height: 120px;
}

.refine-row .btn-secondary {
  flex: 0 0 auto;
  align-self: flex-end;
  padding: 12px 18px;
}

.card-section {
  margin-bottom: 20px;
}

.card-section > .btn-secondary {
  width: 100%;
  margin-bottom: 12px;
}

.card-wrapper.hidden {
  display: none;
}

.card-wrapper {
  background: var(--card);
  border-radius: 20px;
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
}

#shareCanvas {
  display: block;
  width: 100%;
  max-width: 375px;
  height: auto;
  margin: 0 auto;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.session-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: rgba(233, 69, 96, 0.1);
  border: 1px solid rgba(233, 69, 96, 0.25);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--accent-soft);
}

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

.btn-sm {
  padding: 8px 12px !important;
  font-size: 12px !important;
  flex: 0 0 auto !important;
}

.refine-box--disabled {
  opacity: 0.55;
  pointer-events: none;
}

.refine-box--disabled textarea,
.refine-box--disabled button {
  cursor: not-allowed;
}

.card-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.btn-secondary {
  flex: 1;
  background: #2a2a4a;
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-secondary:hover { background: #33335a; }
.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-success {
  flex: 1;
  background: var(--success);
  color: #0f0f1a;
  border: none;
  border-radius: 12px;
  padding: 14px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.upload-qr {
  margin-top: 12px;
  padding: 12px;
  background: rgba(255,255,255,0.03);
  border-radius: 10px;
  border: 1px dashed var(--card-border);
  text-align: center;
}

.upload-qr label {
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  display: block;
}
.upload-qr input { display: none; }

.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.85);
  color: white;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 14px;
  z-index: 1000;
  display: none;
  pointer-events: none;
  backdrop-filter: blur(10px);
}
.toast.show { display: block; animation: fadeIn 0.2s ease; }

@media (max-width: 768px) {
  .workspace { flex-direction: column; }
  .history-sidebar {
    width: 100%;
    position: static;
    max-height: none;
  }
  .conv-list { max-height: 200px; }
}

@media (max-width: 480px) {
  .page { padding: 12px 12px 32px; }
  .header h1 { font-size: 24px; }
  .card-actions { flex-direction: column; }
  .refine-row { flex-direction: column; }
  .refine-row .btn-secondary { align-self: stretch; }
  .chat-messages { max-height: 280px; }
  .msg { max-width: 94%; }
}