:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --secondary: #0f172a;
  --bg-page: #f8fafc;
  --bg-card: rgba(255, 255, 255, 0.9);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --success: #10b981;
  --warn: #f59e0b;
  --fail: #ef4444;
}

* {
  box-sizing: border-box;
  transition: all 0.2s ease;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "PingFang SC", sans-serif;
  background: radial-gradient(circle at top right, #f0f9ff, #f8fafc);
  color: var(--text-main);
  line-height: 1.6;
}

.page {
  min-height: 100vh;
  padding: 64px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card {
  width: min(1100px, 100%);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  padding: 56px;
  display: grid;
  gap: 40px;
}

header {
  text-align: center;
  display: grid;
  gap: 16px;
}

h1 {
  font-size: clamp(36px, 5vw, 48px);
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #0f172a 0%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 18px;
  font-weight: 500;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 8px auto 0;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--text-main);
  font-size: 14px;
  font-weight: 600;
}

.hero-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.35);
}

/* Workflow Progress */
.progress {
  display: grid;
  gap: 12px;
}
.progress-track {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
}
.progress-step {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 14px;
}
.progress-step .icon {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #e2e8f0;
  color: #334155;
  font-size: 12px;
  font-weight: 900;
}
.progress-connector {
  width: 64px;
  height: 2px;
  background: #e2e8f0;
  border-radius: 999px;
}
.progress-step.active {
  color: var(--secondary);
  border-color: rgba(14, 165, 233, 0.35);
  background: white;
  box-shadow: 0 10px 20px rgba(14, 165, 233, 0.12);
}
.progress-step.active .icon {
  background: var(--primary);
  color: white;
}
.progress-step.done {
  color: #0f766e;
  border-color: rgba(13, 148, 136, 0.25);
  background: #f0fdfa;
}
.progress-step.done .icon {
  background: #0d9488;
  color: white;
}
.progress-meta {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
}

.toolbar {
  display: grid;
  gap: 24px;
  background: linear-gradient(180deg, rgba(241,245,249,0.9), rgba(241,245,249,0.6));
  padding: 32px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.toolbar-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.input-group {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: white;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.file-name {
  color: var(--text-muted);
  font-weight: 600;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.input-group select {
  border: 0;
  font-weight: 700;
  color: var(--text-main);
  outline: none;
  cursor: pointer;
  background: transparent;
}

.input-group input {
  border: 0;
  outline: none;
  background: transparent;
  font-weight: 700;
  color: var(--text-main);
  font-size: 15px;
  min-width: 240px;
}

.input-group input::placeholder {
  color: var(--text-muted);
  font-weight: 600;
}

.button {
  border: 0;
  border-radius: 14px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

.button:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.3);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
}

.button.ghost {
  background: white;
  color: var(--text-main);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.button.cta {
  background: linear-gradient(135deg, #0284c7 0%, #2563eb 45%, #0ea5e9 100%);
  padding: 14px 32px;
  font-size: 16px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
}
.button.cta:hover:not(:disabled) {
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.35);
}

/* AI Hint Module */
.ai-hint {
  background: #f0f9ff;
  border: 1px solid rgba(14, 165, 233, 0.2);
  padding: 20px 24px;
  border-radius: 18px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  color: #0369a1;
}
.ai-hint .title {
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 2px;
}
.ai-hint .desc {
  font-size: 14px;
  font-weight: 500;
  opacity: 0.9;
}

/* Literature Cards */
.list {
  display: grid;
  gap: 20px;
}
.paper {
  background: white;
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 24px;
  display: grid;
  gap: 16px;
  position: relative;
  cursor: default;
}
.paper:hover {
  border-color: var(--border);
  box-shadow: var(--shadow);
}
.paper.selected {
  border-color: var(--primary);
  background: #f0f9ff;
  box-shadow: 0 0 0 1px var(--primary), var(--shadow-lg);
}
.paper-header {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.paper .check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
}
.paper .check:hover {
  border-color: var(--primary);
  background: rgba(14, 165, 233, 0.1);
  transform: scale(1.1);
}
.paper.selected .check {
  background: var(--primary);
  border-color: var(--primary);
}
.paper.selected .check:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}
.paper-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.status-badge {
  font-size: 12px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-transform: uppercase;
}
.status-badge.success { background: #dcfce7; color: #166534; }
.status-badge.warn { background: #fef3c7; color: #92400e; }
.status-badge.fail { background: #fee2e2; color: #991b1b; }

.paper-meta {
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
  display: grid;
  gap: 8px;
}

/* Authors line should NOT be a flex container:
   In flex layout, the commas between spans become anonymous flex items,
   then `gap` makes them look like "name , name". */
.paper-authors {
  margin: 8px 0;
  color: var(--text-main);
  font-weight: 600;
  display: block;
  line-height: 1.9;
  word-break: break-word;
}
.meta-line {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.meta-line span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.metrics-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
  align-items: flex-end;
}
.metric-tag {
  background: #f1f5f9;
  border-radius: 12px;
  padding: 10px 16px;
  text-align: right;
  min-width: 130px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.metric-tag .label {
  font-size: 13px;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
}
.metric-tag .val {
  font-size: 16px;
  font-weight: 800;
  color: var(--secondary);
}

.btn-mini {
  background: white;
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-mini:hover {
  background: #f8fafc;
  border-color: var(--primary);
}

.footer {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
}

.site-footer {
  width: min(1100px, 100%);
  margin-top: 18px;
  padding: 18px 12px 6px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 800;
}

.site-footer-logo {
  width: 88px;
  height: 88px;
  display: block;
}

.site-footer-text {
  text-align: left;
  line-height: 1.4;
}

/* Manual Input */
.manual-pubmed {
  margin-top: 16px;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: 14px;
  padding: 16px;
}
.manual-pubmed-row { display: flex; gap: 10px; }
.manual-pubmed-row input {
  flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 14px;
}
.manual-pubmed-help { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

.empty {
  padding: 80px 40px;
  text-align: center;
  color: var(--text-muted);
  background: rgba(241, 245, 249, 0.4);
  border: 2px dashed var(--border);
  border-radius: 24px;
}
.empty i { font-size: 48px; margin-bottom: 16px; display: block; }
.mark { color: var(--primary); font-weight: bold; }

.journal-name-editable {
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: var(--primary);
  color: var(--primary);
  transition: all 0.2s ease;
  padding: 2px 4px;
  border-radius: 4px;
}
.journal-name-editable:hover {
  color: var(--primary-dark) !important;
  text-decoration-style: solid !important;
  background: rgba(14, 165, 233, 0.1);
}

.journal-edit-input {
  padding: 6px 10px;
  border: 2px solid var(--primary);
  border-radius: 8px;
  font-size: 14px;
  min-width: 250px;
  max-width: 500px;
  font-family: inherit;
  outline: none;
  transition: all 0.2s ease;
}
.journal-edit-input:focus {
  border-color: var(--primary-dark);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

/* 模态框样式 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 40px;
  overflow-y: auto;
  animation: fadeIn 0.2s ease;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: white;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 90%;
  max-height: calc(100vh - 80px);
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  animation: slideDown 0.3s ease;
  z-index: 1001;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--bg-page);
  color: var(--text-main);
}

.modal-body {
  padding: 24px 28px;
  overflow-y: auto;
  flex: 1;
}

/* 作者编辑器样式 */
.author-editor-head {
  margin-bottom: 20px;
}

.author-editor-head p {
  margin: 0;
  line-height: 1.6;
}

.author-editor-grid {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 8px;
}

.author-editor-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-page);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.author-editor-row:hover {
  border-color: var(--primary);
  background: rgba(14, 165, 233, 0.05);
}

.author-editor-name {
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
  margin-right: 16px;
}

.author-editor-flags {
  display: flex;
  gap: 16px;
}

.author-editor-flag {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
}

.author-editor-flag input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary);
}

.author-editor-flag:hover {
  color: var(--primary);
}

.author-editor-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

/* 内联作者编辑器样式（直接在卡片中显示） */
.author-editor-inline {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-page);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.author-editor-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 600;
}

.author-list-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-bottom: 12px;
}

.author-item-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: white;
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.author-item-inline:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 4px rgba(14, 165, 233, 0.1);
}

.author-name-inline {
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.author-flag-inline {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
  white-space: nowrap;
}

.author-flag-inline input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary);
  flex-shrink: 0;
}

.author-flag-inline:hover {
  color: var(--primary);
}

.author-editor-actions-inline {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}