/* === 在线颜色表 - 主样式表 === */

:root {
  --primary: #667eea;
  --primary-dark: #5a6fd6;
  --bg: #f8f9fd;
  --card-bg: #ffffff;
  --text: #2d3748;
  --text-light: #718096;
  --text-lighter: #a0aec0;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow: 0 2px 8px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: .2s ease;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* === Layout: Sidebar + Main === */
.layout {
  display: flex;
  min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
  width: 200px;
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: visible;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  text-decoration: none;
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

.logo-icon { font-size: 1.4rem; }

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-section {
  padding: 8px 16px 6px;
  font-size: .75rem;
  color: var(--text-lighter);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.nav-item {
  display: block;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--text-light);
  font-size: .9rem;
  transition: all var(--transition);
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(102,126,234,.06);
  color: var(--primary);
  border-left-color: var(--primary);
}

/* 下拉菜单组 */
.nav-group {
  position: relative;
}

.nav-trigger {
  cursor: pointer;
  user-select: none;
}

.nav-group:hover > .nav-trigger {
  background: rgba(102,126,234,.06);
  color: var(--primary);
  border-left-color: var(--primary);
}

/* 下拉面板：默认隐藏，hover时向右弹出 */
.sidebar-nav .nav-dropdown {
  display: none !important;
  position: absolute;
  left: 100%;
  top: 0;
  min-width: 160px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  flex-direction: column;
}

.nav-group:hover > .nav-dropdown {
  display: flex !important;
}

.nav-subitem {
  display: block !important;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--text-light);
  font-size: .88rem;
  transition: all var(--transition);
  white-space: nowrap;
  width: 100%;
}

.nav-subitem:hover {
  background: rgba(102,126,234,.06);
  color: var(--primary);
}

.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 12px;
}

.sidebar-bottom {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.copy-url-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: .82rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  font-family: var(--font);
  margin-bottom: 10px;
}

.copy-url-btn:hover { border-color: var(--primary); color: var(--primary); }

.sidebar-lang {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.sidebar-lang a {
  padding: 4px 10px;
  text-decoration: none;
  color: var(--text-light);
  font-size: .78rem;
  border-radius: 12px;
  background: var(--bg);
  transition: all var(--transition);
}

.sidebar-lang a:hover { background: var(--primary); color: #fff; }

.sidebar-copy {
  margin-top: 10px;
  font-size: .68rem;
  color: var(--text-lighter);
  text-align: center;
  line-height: 1.4;
}

/* === Main Content === */
.layout-main {
  flex: 1;
  overflow-x: hidden;
}

/* === Main === */
.main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* === Hero === */
.hero {
  text-align: center;
  padding: 20px 0 32px;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--primary), #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 20px;
}

.stats {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: .85rem;
  color: var(--text-light);
}

/* Tip */
.tip {
  text-align: center;
  padding: 14px 20px;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  color: #795548;
  font-size: .9rem;
}

/* Search */
.search-wrap {
  max-width: 500px;
  margin: 0 auto 32px;
}

.search-input {
  width: 100%;
  padding: 14px 20px;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: .95rem;
  outline: none;
  font-family: var(--font);
  transition: all var(--transition);
  background: var(--card-bg);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102,126,234,.15);
}

/* Sections */
.color-section {
  margin-bottom: 40px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
}

.section-count {
  font-size: .8rem;
  color: var(--text-light);
  background: var(--bg);
  padding: 2px 10px;
  border-radius: 20px;
}

/* Color Grid */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}

.color-card {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid var(--border);
}

.color-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.color-preview {
  height: 70px;
  position: relative;
}

.color-info {
  padding: 10px 12px;
}

.color-name {
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.color-hex {
  font-size: .75rem;
  color: var(--text-light);
  font-family: 'Consolas', 'Monaco', monospace;
}

.color-rgb {
  font-size: .7rem;
  color: var(--text-lighter);
  font-family: 'Consolas', 'Monaco', monospace;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #2d3748;
  color: #fff;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: .9rem;
  z-index: 9999;
  animation: toastIn .3s ease, toastOut .3s ease 1.5s forwards;
  pointer-events: none;
  font-family: var(--font);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(-50%) translateY(0); }
  to { opacity: 0; transform: translateX(-50%) translateY(-10px); }
}

/* === Tool Pages === */
.tool-page {
  max-width: 800px;
  margin: 0 auto;
}

.tool-page h1 {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 8px;
}

.tool-page .subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 32px;
}

/* Controls */
.control-group {
  margin-bottom: 20px;
}

.control-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: .9rem;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.slider-row label {
  min-width: 80px;
  font-size: .85rem;
  color: var(--text-light);
  margin: 0;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
}

.slider-row .slider-val {
  min-width: 40px;
  text-align: right;
  font-size: .85rem;
  font-family: 'Consolas', monospace;
}

input[type="color"] {
  width: 60px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 2px;
}

input[type="text"] {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition);
}

input[type="text"]:focus { border-color: var(--primary); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: .9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.btn:hover { background: var(--primary-dark); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--border); color: var(--text); transform: translateY(-1px); }

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

/* Preview */
.preview-box {
  width: 100%;
  height: 200px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  transition: all .3s ease;
}

/* Code block */
.code-block {
  background: #1a1a2e;
  color: #a0ffd0;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  overflow-x: auto;
}

.code-block code {
  flex: 1;
  word-break: break-all;
}

.code-block .btn {
  flex-shrink: 0;
}

/* Preset grid */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.preset-card {
  border-radius: var(--radius-sm);
  height: 80px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.preset-card:hover {
  border-color: var(--primary);
  transform: scale(1.03);
}

/* Scheme colors display */
.scheme-colors {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.scheme-color {
  flex: 1;
  height: 100px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 8px;
}

.scheme-color:hover { transform: translateY(-3px); }

.scheme-color span {
  font-size: .7rem;
  font-family: 'Consolas', monospace;
  padding: 3px 8px;
  background: rgba(255,255,255,.9);
  border-radius: 4px;
}

/* Direction buttons */
.dir-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.dir-btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .85rem;
  transition: all var(--transition);
  font-family: var(--font);
}

.dir-btn:hover, .dir-btn.active {
  border-color: var(--primary);
  background: rgba(102,126,234,.1);
  color: var(--primary);
}

/* Result display */
.result-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.result-label {
  font-weight: 600;
  font-size: .85rem;
  min-width: 50px;
  color: var(--text-light);
}

.result-value {
  font-family: 'Consolas', monospace;
  font-size: .9rem;
  padding: 8px 12px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  flex: 1;
  cursor: pointer;
  transition: all var(--transition);
}

.result-value:hover { background: var(--border); }

/* Responsive */
@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%;
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .sidebar-nav { padding: 8px 0; }
  .nav-item { padding: 10px 16px; font-size: .88rem; }
  .sidebar-bottom { display: none; }
  /* 移动端下拉改为向下展开 */
  .sidebar-nav .nav-dropdown {
    position: static !important;
    left: auto !important;
    top: auto !important;
    border: none !important;
    box-shadow: none !important;
    background: rgba(102,126,234,.04);
    border-radius: 0;
    margin-bottom: 4px;
  }
  .nav-subitem { padding-left: 28px; font-size: .85rem; }
  .stats { gap: 20px; }
  .stat-num { font-size: 1.5rem; }
  .color-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .main { padding: 20px 12px; }
}