/* ========================================
   IKE Lab — 共享基础样式
   所有工具页面的公共 CSS
   ======================================== */

/* ---------- 字体加载 ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Bricolage+Grotesque:wght@700;800&display=swap');

/* ========================================
   主题变量定义
   深色主题 (默认) + 浅色主题 (.light-theme)
   如需新增主题，在此追加即可
   ======================================== */

/* ---------- 深色主题 (默认) ---------- */
:root{
  --bg:#0a0d12;
  --bg-2:#11151c;
  --bg-3:#161b24;
  --bg-4:#1d2430;
  --border:#232c3a;
  --border-light:#2e3a4d;
  --fg:#e8ecf3;
  --fg-2:#a6b0c2;
  --fg-3:#6c7689;
  --accent:#00ff9d;
  --accent-dim:#00b870;
  --accent-2:#ff6b35;
  --danger:#ff4566;
  --warning:#ffb627;
  --glow: 0 0 30px rgba(0,255,157,0.25);
  --grid-line:rgba(0,255,157,0.04);
  --glow-g1:rgba(0,255,157,.45);
  --glow-g2:rgba(255,107,53,.35);
  --glow-g3:rgba(0,180,255,.2);
  --noise-opacity:.04;
  --badge-bg:rgba(0,255,157,.08);
  --badge-border:rgba(0,255,157,.25);
  --accent-alpha-10:rgba(0,255,157,.1);
  --accent-alpha-15:rgba(0,255,157,.15);
  --accent-alpha-25:rgba(0,255,157,.25);
  --accent-alpha-35:rgba(0,255,157,.35);
  --accent-alpha-40:rgba(0,255,157,.4);
  --accent-alpha-30-border:rgba(0,255,157,.3);
  --toast-shadow:0 10px 40px rgba(0,0,0,.4);
  --panel-head-bg:rgba(0,0,0,.2);
  --panel-foot-bg:rgba(0,0,0,.15);

  /* JSON 语法高亮 (深色) */
  --json-key:#7ccdff;
  --json-string:#c3e88d;
  --json-number:#ffb627;
  --json-bool:#ff6b6b;
  --json-null:#a6b0c2;
  --json-bracket:#e8ecf3;

  /* 金额高亮 (深色) */
  --num-highlight:#ffb627;
  --result-gold:#ffd866;

  /* 四季颜色 (深色) */
  --spring:#7ccdff;
  --summer:#ff6b35;
  --autumn:#ffb627;
  --winter:#6ca0ff;

  /* 标签 / Badge (深色) */
  --tag-bg:rgba(0,255,157,.1);
  --tag-border:rgba(0,255,157,.25);
  --tag-fg:var(--accent);

  /* SHA 标签 (深色) */
  --sha-tag-bg:rgba(0,255,157,.1);
  --sha-tag-border:rgba(0,255,157,.25);
  --sha-tag-fg:var(--accent);

  /* 时间戳 (深色) */
  --ts-preview-h:64px;
  --ts-badge-bg:rgba(0,255,157,.1);
  --ts-badge-border:rgba(0,255,157,.25);
  --ts-badge-fg:var(--accent);

  /* 颜色转换器 (深色) */
  --color-preview-size:120px;
  --input-min-width:180px;

  /* LaTeX 编辑器 (深色) */
  --preview-min-height:280px;
  --formula-font-size:1.4em;

  /* index.html 专用 (深色) */
  --card-hover-shadow:0 12px 40px rgba(0,0,0,.3);
  --card-hover-border:rgba(0,255,157,.35);
}

/* ===== 浅色主题 ===== */
.light-theme{
  --bg:#f5f0ea;
  --bg-2:#fefcf9;
  --bg-3:#faf6f0;
  --bg-4:#ede6dc;
  --border:#e0d8cc;
  --border-light:#d0c6b8;
  --fg:#1e1b16;
  --fg-2:#5a5248;
  --fg-3:#948c80;
  --accent:#2a9d6e;
  --accent-dim:#1f7d57;
  --accent-2:#c94d1e;
  --danger:#c93a4e;
  --warning:#b0880a;
  --glow:0 0 30px rgba(42,157,110,0.12);
  --grid-line:rgba(42,157,110,0.06);
  --glow-g1:rgba(42,157,110,.18);
  --glow-g2:rgba(201,77,30,.12);
  --glow-g3:rgba(180,120,60,.10);
  --noise-opacity:.02;
  --badge-bg:rgba(42,157,110,.08);
  --badge-border:rgba(42,157,110,.2);
  --accent-alpha-10:rgba(42,157,110,.1);
  --accent-alpha-15:rgba(42,157,110,.15);
  --accent-alpha-25:rgba(42,157,110,.25);
  --accent-alpha-35:rgba(42,157,110,.35);
  --accent-alpha-40:rgba(42,157,110,.4);
  --accent-alpha-30-border:rgba(42,157,110,.3);
  --toast-shadow:0 10px 40px rgba(0,0,0,.08);
  --panel-head-bg:rgba(0,0,0,.03);
  --panel-foot-bg:rgba(0,0,0,.03);

  /* JSON 语法高亮 (浅色) */
  --json-key:#1a7db8;
  --json-string:#3a8a4a;
  --json-number:#b87a0a;
  --json-bool:#b83a4a;
  --json-null:#7a7a7a;
  --json-bracket:#2a2a2a;

  /* 金额高亮 (浅色) */
  --num-highlight:#b87a0a;
  --result-gold:#c8a840;

  /* 四季颜色 (浅色) */
  --spring:#3a8ab8;
  --summer:#c94d1e;
  --autumn:#b0880a;
  --winter:#4a7ab8;

  /* 标签 / Badge (浅色) */
  --tag-bg:rgba(42,157,110,.1);
  --tag-border:rgba(42,157,110,.2);
  --tag-fg:var(--accent);

  /* SHA 标签 (浅色) */
  --sha-tag-bg:rgba(42,157,110,.1);
  --sha-tag-border:rgba(42,157,110,.2);
  --sha-tag-fg:var(--accent);

  /* 时间戳 (浅色) */
  --ts-preview-h:64px;
  --ts-badge-bg:rgba(42,157,110,.1);
  --ts-badge-border:rgba(42,157,110,.2);
  --ts-badge-fg:var(--accent);

  /* 颜色转换器 (浅色) */
  --color-preview-size:120px;
  --input-min-width:180px;

  /* LaTeX 编辑器 (浅色) */
  --preview-min-height:280px;
  --formula-font-size:1.4em;

  /* index.html 专用 (浅色) */
  --card-hover-shadow:0 12px 40px rgba(0,0,0,.08);
  --card-hover-border:rgba(42,157,110,.4);
}

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

/* ---------- 基础页面 ---------- */
html,body{
  background:var(--bg);
  color:var(--fg);
  font-family:'Space Grotesk',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
}
body{
  min-height:100vh;
  overflow-x:hidden;
}

/* ---------- 背景层 ---------- */
.bg-layer{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  overflow:hidden;
}
.grid-bg{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at 50% 30%,black 30%,transparent 80%);
}
.glow{
  position:absolute;
  border-radius:50%;
  filter:blur(120px);
  opacity:.5;
}
.glow.g1{
  width:600px;height:600px;
  background:radial-gradient(circle,var(--glow-g1),transparent 70%);
  top:-200px;left:-150px;
  animation:drift1 18s ease-in-out infinite;
}
.glow.g2{
  width:500px;height:500px;
  background:radial-gradient(circle,var(--glow-g2),transparent 70%);
  bottom:-150px;right:-100px;
  animation:drift2 22s ease-in-out infinite;
}
.glow.g3{
  width:400px;height:400px;
  background:radial-gradient(circle,var(--glow-g3),transparent 70%);
  top:40%;left:50%;
  animation:drift3 25s ease-in-out infinite;
}
@keyframes drift1{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(100px,80px) scale(1.15)}
}
@keyframes drift2{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(-80px,-60px) scale(1.1)}
}
@keyframes drift3{
  0%,100%{transform:translate(-50%,-50%) scale(1)}
  50%{transform:translate(-30%,-60%) scale(.85)}
}

/* ---------- 噪点 ---------- */
.noise{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:var(--noise-opacity);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='1'/></svg>");
}

/* ---------- Container ---------- */
.container{
  position:relative;
  z-index:2;
  max-width:1400px;
  margin:0 auto;
  padding:32px 40px 80px;
}

/* ---------- Header ---------- */
header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  margin-bottom:48px;
  flex-wrap:wrap;
}
.logo{
  display:flex;
  align-items:center;
  gap:14px;
  cursor:pointer;
}
.logo-mark{
  width:44px;height:44px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-dim) 100%);
  display:grid;place-items:center;
  box-shadow:var(--glow);
  position:relative;
  overflow:hidden;
}
.logo-mark::before{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(135deg,transparent 50%,rgba(255,255,255,.3) 100%);
}
.logo-mark svg{position:relative;z-index:1}
.logo-text h1{
  font-family:'Bricolage Grotesque',sans-serif;
  font-size:24px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1;
}
.logo-text p{
  font-size:12px;
  color:var(--fg-3);
  margin-top:4px;
  font-family:'JetBrains Mono',monospace;
  letter-spacing:.05em;
}
.header-stats{
  display:flex;
  gap:8px;
  align-items:center;
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
}
.stat-pill{
  padding:8px 14px;
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:8px;
  color:var(--fg-2);
  display:flex;align-items:center;gap:8px;
}
.stat-pill .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:.4}
}

/* ---------- Hero 可折叠区域 ---------- */
.hero-wrap{
  flex-shrink:0;
  position:relative;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  overflow:hidden;
  max-height:400px;
  opacity:1;
}
.hero-wrap.collapsed{
  max-height:0;
  opacity:0;
  margin-bottom:0;
}
.hero-wrap .collapse-trigger{
  position:absolute;
  right:0;
  bottom:4px;
  z-index:10;
  width:26px;height:26px;
  border-radius:50%;
  border:1px solid var(--border);
  background:var(--bg-3);
  color:var(--fg-3);
  cursor:pointer;
  display:grid;place-items:center;
  transition:all .2s ease;
}
.hero-wrap .collapse-trigger:hover{
  color:var(--accent);
  border-color:var(--accent-alpha-40);
}
.hero-wrap .collapse-trigger svg{
  width:13px;height:13px;
  transition:transform .3s ease;
}
.hero-wrap.collapsed .collapse-trigger{
  position:relative;
  bottom:auto;
  margin:0 0 0 auto;
  border-color:var(--accent-alpha-30-border);
  box-shadow:0 0 12px var(--accent-alpha-15);
}
.hero-wrap.collapsed .collapse-trigger svg{
  transform:rotate(180deg);
}

.hero{
  margin-bottom:20px;
  max-width:900px;
}
.hero-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  background:var(--badge-bg);
  border:1px solid var(--badge-border);
  border-radius:100px;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--accent);
  letter-spacing:.1em;
  text-transform:uppercase;
  margin-bottom:20px;
}
.hero-label::before{
  content:'';
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent);
}
.hero h2{
  font-family:'Bricolage Grotesque',sans-serif;
  font-size:clamp(40px,5vw,64px);
  font-weight:800;
  line-height:1.05;
  letter-spacing:-.03em;
  margin-bottom:16px;
}
.hero h2 .accent{
  background:linear-gradient(120deg,var(--accent) 0%,var(--accent-2) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero p{
  font-size:17px;
  color:var(--fg-2);
  line-height:1.6;
  max-width:680px;
}

/* ---------- 控制栏 / Toolbar ---------- */
.toolbar{
  background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg-3) 100%);
  border:1px solid var(--border);
  border-radius:14px;
  padding:16px 20px;
  margin-bottom:24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
.toolbar-right{
  display:flex;align-items:center;gap:12px;
}

/* ---------- 分段按钮 ---------- */
.seg{
  display:inline-flex;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:9px;
  padding:3px;
  gap:2px;
}
.seg button{
  padding:7px 14px;
  background:transparent;
  border:none;
  color:var(--fg-2);
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  font-weight:500;
  cursor:pointer;
  border-radius:6px;
  transition:all .2s ease;
  letter-spacing:.02em;
}
.seg button:hover{color:var(--fg)}
.seg button.active{
  background:var(--accent-alpha-15);
  color:var(--accent);
  box-shadow:inset 0 0 0 1px var(--accent-alpha-30-border);
}

/* ---------- 通用按钮 ---------- */
.btn{
  padding:9px 18px;
  border-radius:8px;
  font-family:'Space Grotesk',sans-serif;
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  border:1px solid var(--border);
  background:var(--bg-4);
  color:var(--fg);
  transition:all .15s ease;
  display:inline-flex;
  align-items:center;
  gap:8px;
  letter-spacing:.01em;
  white-space:nowrap;
}
.btn:hover{background:var(--bg-3);border-color:var(--border-light)}
.btn:active{transform:translateY(1px)}
.btn.primary{
  background:var(--accent);
  color:#001a10;
  border-color:var(--accent);
}
.btn.primary:hover{
  background:#33ffae;
  box-shadow:0 0 20px rgba(0,255,157,.4);
}
.btn.warn{
  background:var(--accent-2);
  color:#1a0a04;
  border-color:var(--accent-2);
}
.btn.warn:hover{
  background:#ff8557;
  box-shadow:0 0 20px rgba(255,107,53,.4);
}
.btn svg{width:14px;height:14px}

/* ---------- 面板 ---------- */
.panel{
  background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg-3) 100%);
  border:1px solid var(--border);
  border-radius:16px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:border-color .3s ease;
}
.panel:focus-within{
  border-color:var(--accent-alpha-35);
}

.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 18px;
  border-bottom:1px solid var(--border);
  background:var(--panel-head-bg);
}
.panel-head-left{
  display:flex;align-items:center;gap:10px;
}
.panel-icon{
  width:28px;height:28px;
  border-radius:7px;
  display:grid;place-items:center;
  background:var(--accent-alpha-10);
  color:var(--accent);
}
.panel-title{
  font-size:14px;
  font-weight:600;
  color:var(--fg);
  letter-spacing:.01em;
}
.panel-title .mono{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--fg-3);
  margin-left:8px;
  font-weight:400;
}
.panel-counter{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--fg-3);
  padding:3px 8px;
  background:var(--bg-4);
  border-radius:5px;
}

.panel-body{
  flex:1;
  display:flex;
  flex-direction:column;
  position:relative;
}
.text-area{
  width:100%;
  background:transparent;
  border:none;
  color:var(--fg);
  font-family:'JetBrains Mono',monospace;
  font-size:14px;
  line-height:1.6;
  padding:18px;
  resize:none;
  min-height:220px;
  flex:1;
  outline:none;
}
.text-area::placeholder{
  color:var(--fg-3);
}
.text-area::-webkit-scrollbar{width:8px;height:8px}
.text-area::-webkit-scrollbar-track{background:transparent}
.text-area::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}
.text-area::-webkit-scrollbar-thumb:hover{background:var(--fg-3)}

.panel-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 14px;
  border-top:1px solid var(--border);
  background:var(--panel-foot-bg);
  gap:8px;
  flex-wrap:wrap;
}
.foot-info{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--fg-3);
  display:flex;
  align-items:center;
  gap:10px;
}
.foot-info .sep{color:var(--border-light)}
.foot-actions{
  display:flex;
  gap:6px;
}
.icon-btn{
  width:30px;height:30px;
  border:1px solid var(--border);
  background:var(--bg-4);
  border-radius:6px;
  color:var(--fg-2);
  cursor:pointer;
  display:grid;place-items:center;
  transition:all .15s ease;
}
.icon-btn:hover{
  background:var(--bg-3);
  color:var(--accent);
  border-color:var(--accent-alpha-40);
}
.icon-btn:active{transform:scale(.92)}
.icon-btn svg{width:14px;height:14px}

/* ---------- 主题切换按钮（固定于页面右上角） ---------- */
.theme-toggle{
  position:fixed;
  top:20px;
  right:20px;
  z-index:100;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--bg-2);
  color:var(--fg-2);
  cursor:pointer;
  display:grid;
  place-items:center;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 4px 16px rgba(0,0,0,.15);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.theme-toggle:hover{
  border-color:var(--accent);
  color:var(--accent);
  transform:translateY(-2px);
  box-shadow:0 6px 24px rgba(0,0,0,.2);
}
.theme-toggle:active{
  transform:translateY(0);
}
.theme-toggle svg{
  width:20px;
  height:20px;
  transition:transform .5s cubic-bezier(.4,0,.2,1);
}
.theme-toggle:active svg{
  transform:rotate(30deg);
}
.theme-toggle .sun-icon{display:none}
.light-theme .theme-toggle .moon-icon{display:none}
.light-theme .theme-toggle .sun-icon{display:block}

/* ---------- Toast 通知 ---------- */
.toast-stack{
  position:fixed;
  bottom:24px;
  right:24px;
  z-index:100;
  display:flex;
  flex-direction:column;
  gap:10px;
  pointer-events:none;
}
.toast{
  background:var(--bg-3);
  border:1px solid var(--border-light);
  border-radius:10px;
  padding:12px 16px;
  display:flex;
  align-items:center;
  gap:10px;
  min-width:240px;
  max-width:380px;
  font-size:13px;
  color:var(--fg);
  box-shadow:var(--toast-shadow);
  transform:translateX(120%);
  opacity:0;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  pointer-events:auto;
}
.toast.show{transform:translateX(0);opacity:1}
.toast.success{border-left:3px solid var(--accent)}
.toast.error{border-left:3px solid var(--danger)}
.toast.info{border-left:3px solid var(--accent-2)}
.toast-icon{
  width:22px;height:22px;
  border-radius:50%;
  display:grid;place-items:center;
  flex-shrink:0;
}
.toast.success .toast-icon{background:var(--accent-alpha-15);color:var(--accent)}
.toast.error .toast-icon{background:rgba(255,69,102,.15);color:var(--danger)}
.toast.info .toast-icon{background:rgba(255,107,53,.15);color:var(--accent-2)}
.toast-msg{flex:1;line-height:1.4}

/* ---------- 功能卡片 ---------- */
.features{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-bottom:24px;
}
.feature-card{
  background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg-3) 100%);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
}
.feature-card h4{
  font-size:13px;
  font-weight:600;
  margin-bottom:8px;
  display:flex;
  align-items:center;
  gap:8px;
}
.feature-card h4 .num{
  width:22px;height:22px;
  border-radius:5px;
  background:var(--bg-4);
  color:var(--accent);
  display:grid;place-items:center;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  font-weight:700;
}
.feature-card p{
  font-size:12px;
  color:var(--fg-2);
  line-height:1.6;
}
.feature-card code{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  padding:1px 5px;
  background:var(--bg-4);
  border-radius:3px;
  color:var(--accent);
}

@media (max-width:900px){
  .features{grid-template-columns:1fr}
}

/* ---------- Footer ---------- */
footer{
  margin-top:40px;
  padding-top:24px;
  border-top:1px solid var(--border);
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  font-size:12px;
  color:var(--fg-3);
  font-family:'JetBrains Mono',monospace;
}
footer a{color:var(--fg-2);text-decoration:none;transition:color .15s}
footer a:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:600px){
  .container{padding:20px 16px 60px}
  .hero h2{font-size:36px}
  .toolbar{padding:14px}
  .panel-foot{padding:8px 10px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}