/* ============================================================
   ByteJump 字节跳跃 - 全局样式
   主题：深色科技风 / 字节蓝紫渐变
   ============================================================ */

:root {
  --bg: #0a0e17;
  --bg-soft: #0f1524;
  --card: #121a2e;
  --card-hover: #16203a;
  --border: #1e2a45;
  --text: #e6ecf7;
  --text-dim: #8b9bb4;
  --text-faint: #5b6b85;
  --accent: #22d3ee;
  --accent-2: #8b5cf6;
  --accent-3: #f472b6;
  --gradient: linear-gradient(135deg, #22d3ee 0%, #8b5cf6 100%);
  --gradient-text: linear-gradient(135deg, #67e8f9 0%, #a78bfa 60%, #f472b6 100%);
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --mono: "JetBrains Mono", "Fira Code", Consolas, "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(800px 400px at 80% -10%, rgba(139, 92, 246, 0.15), transparent 60%),
    radial-gradient(700px 400px at 10% -10%, rgba(34, 211, 238, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* ---------------- 顶部导航 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(10, 14, 23, 0.8);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  letter-spacing: 0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  box-shadow: 0 0 18px rgba(139, 92, 246, 0.5);
}

.logo-sub {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 400;
  letter-spacing: 2px;
}

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

.nav-links a {
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.2s;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--card);
}

.nav-links a.active {
  color: var(--accent);
  background: rgba(34, 211, 238, 0.1);
}

/* ---------------- 首页 Hero ---------------- */

.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px 40px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, 0.4);
  background: rgba(139, 92, 246, 0.1);
  color: #c4b5fd;
  font-size: 13px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero h1 .grad {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 32px;
}

/* ---------------- 搜索框 ---------------- */

.search-wrap {
  max-width: 560px;
  margin: 0 auto 8px;
  position: relative;
}

.search-wrap svg {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  stroke: var(--text-faint);
  fill: none;
  stroke-width: 2;
}

.search-input {
  width: 100%;
  padding: 15px 20px 15px 48px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: all 0.25s;
}

.search-input::placeholder {
  color: var(--text-faint);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15), 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* ---------------- 分类与工具卡片 ---------------- */

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px 80px;
}

.category {
  margin-top: 48px;
}

.category-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.category-title::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: var(--gradient);
}

.category-title span {
  font-size: 12px;
  color: var(--text-faint);
  font-weight: 400;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.25s;
}

.tool-card:hover {
  transform: translateY(-4px);
  background: var(--card-hover);
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: var(--shadow);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 14px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

.tool-card:nth-child(4n+2) .tool-icon {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.25);
}

.tool-card:nth-child(4n+3) .tool-icon {
  background: rgba(244, 114, 182, 0.12);
  border-color: rgba(244, 114, 182, 0.25);
}

.tool-card:nth-child(4n+4) .tool-icon {
  background: rgba(251, 191, 36, 0.12);
  border-color: rgba(251, 191, 36, 0.25);
}

.tool-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--text);
}

.tool-card p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.tool-card .go {
  margin-top: 12px;
  font-size: 12px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transform: translateX(-6px);
  transition: all 0.25s;
}

.tool-card:hover .go {
  opacity: 1;
  transform: translateX(0);
}

/* 搜索时隐藏分类标题 */
body.searching .category {
  display: none;
}
body.searching .category.visible {
  display: block;
}

.no-result {
  text-align: center;
  padding: 80px 0;
  color: var(--text-faint);
  display: none;
}
.no-result.show {
  display: block;
}
.no-result .big {
  font-size: 42px;
  margin-bottom: 12px;
}

/* ---------------- 工具页通用 ---------------- */

.tool-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.tool-header {
  margin-bottom: 32px;
}

.tool-header .back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 20px;
  transition: color 0.2s;
}

.tool-header .back:hover {
  color: var(--accent);
}

.tool-header h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 6px;
}

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

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

.panel h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.panel-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* 输入控件 */
input[type="text"],
input[type="number"],
input[type="search"],
input[type="password"],
input[type="datetime-local"],
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 14px;
  outline: none;
  font-family: var(--mono);
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}

input[type="range"] {
  accent-color: var(--accent);
}

select {
  font-family: inherit;
  cursor: pointer;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 22px;
  border-radius: 10px;
  border: none;
  background: var(--gradient);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn:hover {
  filter: brightness(1.15);
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.4);
}

.btn:active {
  transform: scale(0.97);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 500;
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-faint);
  box-shadow: none;
  filter: none;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

.btn-copy {
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--accent);
  font-weight: 500;
}

.btn-copy:hover {
  background: rgba(34, 211, 238, 0.2);
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.2);
}

/* 选项行 */
.option-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-dim);
}

.option-row input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* 结果输出 */
.output {
  position: relative;
  margin-top: 14px;
}

.output textarea,
.output .result-box {
  background: var(--bg);
  border: 1px dashed var(--border);
  color: var(--text);
}

.output .copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
}

.result-box {
  padding: 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 13px;
  word-break: break-all;
  min-height: 48px;
  user-select: all;
}

/* 标签 / 徽章 */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--mono);
  background: rgba(34, 211, 238, 0.1);
  color: var(--accent);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1b2438;
  color: var(--text);
  border: 1px solid rgba(139, 92, 246, 0.5);
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast .check {
  color: #4ade80;
  margin-right: 8px;
}

/* ---------------- 页脚 ---------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
}

.site-footer .logo-mini {
  font-family: var(--mono);
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 640px) {
  .nav {
    flex-wrap: wrap;
    gap: 12px;
  }
  .nav-links {
    margin-left: 0;
  }
  .hero {
    padding-top: 48px;
  }
  .tool-grid {
    grid-template-columns: 1fr;
  }
  .panel {
    padding: 18px;
  }
}