/* ========================================
   ZenTools 统一工具 UI — 共享样式
   Design System: --zen-* (v3.2+), with legacy aliases
   ======================================== */

:root {
  /* ── New design system (v3.2+) ── */
  --zen-primary:    #0066FF;
  --zen-secondary:  #00C2B8;
  --zen-gradient:   linear-gradient(135deg, #0066FF, #00C2B8);
  --zen-success:    #22C55E;
  --zen-warning:    #F97316;
  --zen-danger:     #EF4444;
  --zen-text-main:  #111827;
  --zen-text-sub:   #4B5563;
  --zen-text-placeholder: #9CA3AF;
  --zen-bg-base:    #F9FAFB;
  --zen-bg-card:    #FFFFFF;
  --zen-border:     #E5E7EB;
  --zen-radius-base: 12px;
  --zen-radius-card: 16px;
  --zen-radius-btn:  8px;

  /* ── Legacy aliases (backward compat) ── */
  --bg:      var(--zen-bg-base);
  --glass:   var(--zen-bg-card);
  --glass-b: rgba(0,0,0,0.04);
  --cyan:    var(--zen-primary);
  --purple:  var(--zen-secondary);
  --pink:    var(--zen-danger);
  --text:    var(--zen-text-main);
  --muted:   var(--zen-text-sub);
  --border:  var(--zen-border);
  --border-h:rgba(0,102,255,0.35);
  --glow-c:  0 0 40px rgba(0,102,255,0.12);
  --r:       16px;
}

/* ── Dark mode overrides ── */
.dark, [data-theme="dark"] {
  --zen-text-main:  #F9FAFB;
  --zen-text-sub:   #D1D5DB;
  --zen-text-placeholder: #64748B;
  --zen-bg-base:    #0F172A;
  --zen-bg-card:    #1E293B;
  --zen-border:     #334155;
}

/* Manually-inherited legacy vars for dark mode */
.dark, [data-theme="dark"] {
  --glass-b: rgba(255,255,255,0.06);
  --border-h: rgba(0,102,255,0.35);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}

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

/* 噪点纹理背景 */
body::before {
  content: ''; position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 1;
}

/* 浮动光晕 */
.blob { position: fixed; border-radius: 50%; filter: blur(120px); opacity: 0.10; pointer-events: none; z-index: 0; }
.blob-1 { width: 600px; height: 600px; background: var(--cyan);   top: -150px; right: -100px; }
.blob-2 { width: 500px; height: 500px; background: var(--purple); bottom: -100px; left: -100px; }

.z-wrap { position: relative; z-index: 2; }

/* 导航栏全局搜索 */
.nav-search { position: relative; margin-left: auto; }
.nav-search-input {
  width: 140px; padding: 6px 12px 6px 32px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--glass); color: var(--text); font-size: 13px;
  outline: none; transition: width 0.3s, border-color 0.2s;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7a9f' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: 10px center;
}
.nav-search-input:focus { width: 220px; border-color: var(--cyan); }
.nav-search-input::placeholder { color: var(--muted); font-size: 12px; }
.nav-search-dropdown {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  width: 360px; max-height: 400px; overflow-y: auto;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  z-index: 200;
}
.nav-search-dropdown.show { display: block; }
.nav-search-dropdown .nsd-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.nav-search-dropdown .nsd-item:last-child { border-bottom: none; }
.nav-search-dropdown .nsd-item:hover,
.nav-search-dropdown .nsd-item.nsd-highlight { background: rgba(0,229,255,0.06); }
.nav-search-dropdown .nsd-icon { font-size: 18px; flex-shrink: 0; }
.nav-search-dropdown .nsd-info { flex: 1; min-width: 0; }
.nav-search-dropdown .nsd-info .nsd-name { font-size: 14px; font-weight: 600; }
.nav-search-dropdown .nsd-info .nsd-desc {
  font-size: 12px; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nav-search-dropdown .nsd-cat {
  font-size: 10px; font-weight: 700; padding: 2px 8px;
  border-radius: 6px; background: rgba(0,229,255,0.08);
  color: var(--cyan); white-space: nowrap; flex-shrink: 0;
}
.nav-search-dropdown .nsd-empty {
  padding: 24px; text-align: center; color: var(--muted); font-size: 13px;
}

@media (max-width: 768px) {
  .nav-search-input { width: 100px; }
  .nav-search-input:focus { width: 140px; }
  .nav-search-dropdown { width: 300px; right: -60px; }
}

/* 导航栏 */
nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(24px) saturate(180%);
  background: rgba(6,7,13,0.75);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.nav-inner {
  max-width: 1200px; margin: auto; height: 64px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.logo {
  font-size: 22px; font-weight: 900; letter-spacing: -0.5px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.logo span { font-weight: 300; font-size: 13px; margin-left: 6px; vertical-align: middle; -webkit-text-fill-color: var(--muted); color: var(--muted); }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  padding: 8px 16px; border-radius: 10px; font-size: 14px; font-weight: 500;
  color: var(--muted); transition: color 0.2s, background 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--glass-b); }

.lang-select {
  padding: 6px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.04); color: var(--muted); font-size: 13px;
  cursor: pointer; transition: color 0.2s, background 0.2s;
}
.lang-select:hover { color: var(--text); background: var(--glass-b); }
.lang-select:focus { outline: none; border-color: var(--border-h); }

/* 页面头部 */
.page-header {
  max-width: 1200px; margin: 0 auto;
  padding: 72px 24px 56px;
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--muted); margin-bottom: 28px;
}
.breadcrumb a { color: var(--muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb-sep { opacity: 0.3; }
.breadcrumb .cur { color: var(--cyan); }

.page-eyebrow {
  display: inline-block; font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 14px;
}
.page-header h1 {
  font-size: clamp(34px, 5vw, 60px); font-weight: 900;
  letter-spacing: -1.5px; line-height: 1.08; margin-bottom: 16px;
}
.page-header h1 .grad {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.page-header p { color: var(--muted); font-size: 17px; line-height: 1.75; max-width: 560px; }

/* 工具卡片 */
.tool-box {
  max-width: 900px; margin: 0 auto 48px;
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--r); padding: 36px;
  backdrop-filter: blur(8px);
}
.tool-box h2 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.tool-box .note { color: var(--muted); font-size: 15px; margin-bottom: 24px; }

/* 文件输入行 */
.file-input-row {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.file-input-row input[type="file"] {
  flex: 1; min-width: 280px;
  padding: 14px 18px; border: 1px dashed rgba(255,255,255,0.15);
  border-radius: 12px; background: rgba(255,255,255,0.02);
  color: var(--muted); font-size: 14px; cursor: pointer;
}
.file-input-row input[type="file"]::file-selector-button {
  border: none; background: var(--glass-b); color: var(--text);
  padding: 8px 16px; border-radius: 8px; margin-right: 12px;
  cursor: pointer; transition: background 0.2s;
}
.file-input-row input[type="file"]::file-selector-button:hover { background: rgba(255,255,255,0.12); }

/* 主按钮 */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border-radius: 12px; border: none;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #000; font-size: 16px; font-weight: 700; cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-2px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* 状态文字 */
.status {
  margin-top: 16px; color: var(--muted); font-size: 14px;
  min-height: 22px;
}

/* 信息区 */
.section { max-width: 1200px; margin: 0 auto; padding: 64px 24px; }
.section-head { margin-bottom: 40px; }
.section-eyebrow {
  display: inline-block; font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan); margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 800; }

/* 信息卡片网格 */
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.info-card {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px; backdrop-filter: blur(8px);
}
.info-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 10px; color: var(--cyan); }
.info-card p { font-size: 14px; color: var(--muted); line-height: 1.65; }

/* 页脚 */
footer { border-top: 1px solid var(--border); padding: 40px 24px; text-align: center; }
.footer-inner { max-width: 1200px; margin: auto; }
.footer-logo {
  font-size: 20px; font-weight: 900; letter-spacing: -0.5px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  display: inline-block; margin-bottom: 16px;
}
.footer-links { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a {
  color: var(--muted); font-size: 14px; padding: 6px 12px;
  border-radius: 8px; transition: color 0.2s, background 0.2s;
}
.footer-links a:hover { color: var(--text); background: var(--glass-b); }
.footer-copy { color: var(--muted); font-size: 13px; }

/* 响应式 */
@media (max-width: 1024px) { .info-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .info-grid { grid-template-columns: 1fr; }
  .tool-box { padding: 24px; }
}

/* ========================================
   性能提示与进度组件
   ======================================== */

/* 文件大小警告条 */
.zt-perf-warn {
  display: none;
  margin-top: 16px; padding: 12px 18px;
  border-radius: 10px;
  background: rgba(255,193,7,0.08); border: 1px solid rgba(255,193,7,0.25);
  color: #ffc107; font-size: 13px; line-height: 1.6;
}
.zt-perf-warn.visible { display: block; }
.zt-perf-warn.zt-perf-error {
  background: rgba(244,63,94,0.08); border-color: rgba(244,63,94,0.25); color: #f43f5e;
}
.zt-perf-warn .zt-perf-warn-icon { font-size: 15px; margin-right: 6px; }

/* 浏览器推荐条 */
.zt-browser-reco {
  display: none;
  margin-bottom: 24px; padding: 14px 20px;
  border-radius: 12px;
  background: rgba(0,229,255,0.05); border: 1px solid rgba(0,229,255,0.15);
  color: var(--muted); font-size: 14px; line-height: 1.6;
}
.zt-browser-reco.visible { display: flex; align-items: flex-start; gap: 12px; }
.zt-browser-reco .zt-br-icon { font-size: 22px; flex-shrink: 0; margin-top: 1px; }
.zt-browser-reco .zt-br-close {
  margin-left: auto; background: none; border: none; color: var(--muted);
  font-size: 18px; cursor: pointer; padding: 0 4px; line-height: 1;
}

/* 进度条容器 */
.zt-progress-wrap {
  display: none; margin-top: 16px;
}
.zt-progress-wrap.active { display: block; }
.zt-progress-bar {
  width: 100%; height: 6px; border-radius: 3px;
  background: rgba(255,255,255,0.06); overflow: hidden;
}
.zt-progress-fill {
  height: 100%; border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transition: width 0.3s ease;
  width: 0%;
}
.zt-progress-fill.indeterminate {
  width: 40%;
  animation: zt-progress-indeterminate 1.5s ease-in-out infinite;
}
@keyframes zt-progress-indeterminate {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}
.zt-progress-text {
  margin-top: 8px; font-size: 13px; color: var(--muted);
  display: flex; align-items: center; gap: 8px;
}
.zt-progress-text .zt-spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--border); border-top-color: var(--cyan);
  border-radius: 50%; animation: zt-spin 0.6s linear infinite;
}
@keyframes zt-spin {
  to { transform: rotate(360deg); }
}

/* ===== 新工具提醒条 ===== */
.zt-new-tools-bar {
  padding: 10px 24px; background: rgba(0,229,255,0.08);
  border-bottom: 1px solid rgba(0,229,255,0.15);
  color: var(--text); font-size: 14px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.zt-new-tools-bar .zt-nt-icon { font-size: 18px; }
.zt-new-tools-bar .zt-nt-view { color: var(--cyan); font-weight: 600; margin-left: auto; text-decoration: none; }
.zt-new-tools-bar .zt-nt-close { background: none; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); font-size: 12px; cursor: pointer; padding: 4px 12px; }
.zt-new-tools-bar .zt-nt-close:hover { border-color: var(--cyan); color: var(--cyan); }