/* ============================================================
   aigc2 · Lovart-inspired UI Framework
   极简白底 + 深墨绿主色 + 大量留白
   ============================================================ */

:root {
  --bg: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-soft: #F3F4F6;
  --bg-hover: #F9FAFB;

  --text-primary: #1A1A1A;
  --text-secondary: #4B5563;
  --text-muted: #6B7280;
  --text-hint: #9CA3AF;

  --border: #E5E7EB;
  --border-soft: #F3F4F6;

  --brand: #1E3A32;
  --brand-hover: #0F6E56;
  --brand-soft: #E1F5EE;
  --brand-soft-text: #085041;

  --accent-amber: #FAC775;
  --accent-amber-soft: #FFF8EC;
  --accent-amber-text: #633806;

  --danger: #A32D2D;
  --danger-soft: #FCEBEB;
  --danger-text: #791F1F;

  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
}

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

input, textarea, select, button { font-family: inherit; font-size: inherit; }

/* ============================================================
   顶部导航栏
============================================================ */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.navbar-logo {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.navbar-logo-accent { color: var(--brand); }
.navbar-nav {
  display: flex;
  gap: 4px;
  margin-left: 20px;
  flex: 1;
}
.navbar-nav a {
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.15s;
}
.navbar-nav a:hover { background: var(--bg-soft); color: var(--text-primary); }
.navbar-nav a.active { background: var(--brand-soft); color: var(--brand-soft-text); }

.navbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.navbar-user:hover { background: var(--bg-soft); }
.navbar-user .avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-soft-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
}
.navbar-user .name { font-size: 14px; color: var(--text-primary); }
.navbar-user .credits {
  font-size: 12px;
  color: var(--brand-soft-text);
  background: var(--brand-soft);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}

/* ============================================================
   主内容区
============================================================ */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 28px 60px;
}
.main-narrow { max-width: 720px; }
.main-center-vertical {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.page-header { margin-bottom: 28px; }
.page-title { font-size: 24px; font-weight: 500; color: var(--text-primary); letter-spacing: -0.01em; margin-bottom: 4px; }
.page-subtitle { font-size: 14px; color: var(--text-muted); }

/* ============================================================
   卡片
============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.card + .card { margin-top: 16px; }
.card-title { font-size: 16px; font-weight: 500; color: var(--text-primary); margin-bottom: 6px; }
.card-subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
.card-compact { padding: 20px; }

/* ============================================================
   表单
============================================================ */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; }
.form-hint { font-size: 12px; color: var(--text-hint); margin-top: 4px; }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: border-color 0.15s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--text-primary);
}
.form-input::placeholder { color: var(--text-hint); }
.form-textarea { resize: vertical; min-height: 88px; line-height: 1.6; }

.form-input-lg { padding: 14px 18px; font-size: 15px; }

/* ============================================================
   按钮
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}
.btn:hover { border-color: var(--text-primary); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary { background: var(--text-primary); color: white; border-color: var(--text-primary); }
.btn-primary:hover { background: #333; }

.btn-brand { background: var(--brand); color: white; border-color: var(--brand); }
.btn-brand:hover { background: var(--brand-hover); border-color: var(--brand-hover); }

.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-danger:hover { background: #8a2424; }

.btn-ghost { background: transparent; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: var(--bg-soft); color: var(--text-primary); border-color: transparent; }

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-block { width: 100%; }

/* ============================================================
   状态/通知
============================================================ */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 20px;
  border-left: 3px solid;
}
.alert-success { background: var(--brand-soft); color: var(--brand-soft-text); border-left-color: var(--brand); }
.alert-danger { background: var(--danger-soft); color: var(--danger-text); border-left-color: var(--danger); }
.alert-warning { background: var(--accent-amber-soft); color: var(--accent-amber-text); border-left-color: #EF9F27; }
.alert-info { background: #E6F1FB; color: #0C447C; border-left-color: #378ADD; }

/* ============================================================
   徽章
============================================================ */
.badge {
  display: inline-block;
  padding: 2px 10px;
  background: var(--bg-soft);
  color: var(--text-secondary);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}
.badge-brand { background: var(--brand-soft); color: var(--brand-soft-text); }
.badge-amber { background: var(--accent-amber-soft); color: var(--accent-amber-text); }
.badge-danger { background: var(--danger-soft); color: var(--danger-text); }

/* ============================================================
   列表/表格
============================================================ */
.list { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.list-item { padding: 16px 22px; border-bottom: 1px solid var(--border-soft); display: flex; align-items: center; gap: 14px; }
.list-item:last-child { border-bottom: none; }
.list-item:hover { background: var(--bg-hover); }

.table { width: 100%; font-size: 13px; border-collapse: collapse; }
.table th { text-align: left; padding: 12px; background: var(--bg-hover); color: var(--text-muted); font-weight: 500; font-size: 12px; border-bottom: 1px solid var(--border); }
.table td { padding: 12px; border-bottom: 1px solid var(--border-soft); color: var(--text-primary); }
.table tr:last-child td { border-bottom: none; }

/* ============================================================
   网格布局
============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }

/* ============================================================
   杂项
============================================================ */
.muted { color: var(--text-muted); }
.hint { color: var(--text-hint); font-size: 12px; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: 4px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }

.divider { height: 1px; background: var(--border-soft); margin: 20px 0; border: none; }

.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state-icon {
  font-size: 36px;
  margin-bottom: 16px;
  opacity: 0.4;
}
.empty-state-title { font-size: 16px; color: var(--text-primary); margin-bottom: 6px; font-weight: 500; }
.empty-state-hint { font-size: 13px; color: var(--text-muted); }

/* ============================================================
   响应式
============================================================ */
@media (max-width: 720px) {
  .main { padding: 20px 16px 40px; }
  .navbar-inner { padding: 0 16px; }
  .card { padding: 20px; }
  .navbar-nav { display: none; }
}