/* === hyfbot Design System v3 === */
/* Dark theme with warm accents, mobile-first */

:root {
  --bg: #0b0f19;
  --bg-card: #111827;
  --bg-elevated: #1a2332;
  --border: #1e293b;
  --border-light: #293548;
  --text: #e8edf5;
  --text-dim: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99,102,241,0.25);
  --warm: #f59e0b;
  --warm-hover: #d97706;
  --warm-glow: rgba(245,158,11,0.2);
  --teal: #14b8a6;
  --teal-glow: rgba(20,184,166,0.2);
  --green: #22c55e;
  --red: #ef4444;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-sm: 6px;
  --font: 'Inter','Noto Sans SC',system-ui,-apple-system,sans-serif;
  --font-mono: 'JetBrains Mono','Fira Code',monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 24px rgba(0,0,0,0.25);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.12);
}

/* Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
html{-webkit-font-smoothing:antialiased;scroll-padding-top:80px}
body{
  font-family:var(--font);background:var(--bg);color:var(--text);
  line-height:1.6;min-height:100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99,102,241,0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(245,158,11,0.04), transparent);
  background-attachment: fixed;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit;cursor:pointer}
input,button{border:none;outline:2px solid transparent;font-family:var(--font)}
input:focus-visible,button:focus-visible{outline-color:var(--accent);outline-offset:2px}

/* === Typography === */
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700}
h1{font-size:clamp(2.2rem,6vw,3.8rem);letter-spacing:-0.02em}
h2{font-size:clamp(1.6rem,3.5vw,2.2rem);letter-spacing:-0.01em}
h3{font-size:1.15rem}
.gradient-text{
  background:linear-gradient(135deg,var(--accent),#818cf8,var(--teal));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text
}
.text-dim{color:var(--text-dim)}
.text-muted{color:var(--text-muted)}

/* === Buttons === */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;
  cursor:pointer;white-space:nowrap;border:1px solid transparent
}
@media(prefers-reduced-motion:no-preference){.btn{transition:all .2s}}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 8px var(--accent-glow)}
@media(prefers-reduced-motion:no-preference){.btn-primary:hover{transform:translateY(-1px)}}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 4px 16px var(--accent-glow)}
.btn-warm{background:var(--warm);color:#0f172a;box-shadow:0 2px 8px var(--warm-glow)}
@media(prefers-reduced-motion:no-preference){.btn-warm:hover{transform:translateY(-1px)}}
.btn-warm:hover{background:var(--warm-hover)}
.btn-outline{background:transparent;border:1px solid var(--border-light);color:var(--text)}
.btn-outline:hover{background:var(--bg-elevated);border-color:var(--text-dim)}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:var(--radius)}
.btn-sm{padding:6px 14px;font-size:13px}
.btn-block{width:100%}

/* === Sidebar Layout === */
body.has-sidebar{padding-left:240px}
@media(max-width:768px){body.has-sidebar{padding-left:0}}

.site-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:100;
  background:rgba(15,19,29,0.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-right:1px solid var(--border);
  display:flex;flex-direction:column;padding:0
}
@media(prefers-reduced-motion:no-preference){.site-sidebar{transition:transform .3s}}
.sidebar-brand{
  display:flex;align-items:center;gap:10px;padding:18px 20px;
  border-bottom:1px solid var(--border);min-height:60px;color:inherit
}
.sidebar-brand .brand-icon{
  width:32px;height:32px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),#818cf8);color:#fff;flex-shrink:0
}
.sidebar-brand span{font-weight:700;font-size:16px;letter-spacing:-0.3px}
.sidebar-brand small{font-size:10px;color:var(--text-muted);font-weight:500;display:block;margin-top:-2px}

.sidebar-nav{flex:1;padding:10px 10px;overflow-y:auto;display:flex;flex-direction:column;gap:2px}
.sidebar-nav a{
  display:flex;align-items:center;gap:12px;
  padding:10px 14px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:500;color:var(--text-dim);
  transition:all .2s;text-decoration:none
}
.sidebar-nav a:hover{color:var(--text);background:var(--bg-elevated)}
.sidebar-nav a.active{color:#fff;background:var(--accent);box-shadow:0 2px 8px var(--accent-glow)}
.sidebar-nav a .nav-icon{width:20px;text-align:center;font-size:16px;flex-shrink:0}
.sidebar-nav a .nav-badge{
  margin-left:auto;font-size:10px;font-weight:600;padding:2px 8px;border-radius:100px;
  background:rgba(255,255,255,0.15);color:var(--text-dim)
}
.sidebar-nav .nav-label{font-size:10px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;padding:14px 14px 6px}

.sidebar-user{
  padding:14px 16px;border-top:1px solid var(--border);
  display:flex;align-items:center;gap:10px;min-height:60px
}
.sidebar-user .avatar{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--teal));
  color:#fff;font-weight:700;font-size:14px
}
.sidebar-user .user-info{flex:1;min-width:0}
.sidebar-user .user-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-user .user-tier{font-size:11px;color:var(--text-muted)}
.sidebar-user .logout-btn{
  width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  background:transparent;border:1px solid var(--border);color:var(--text-dim);cursor:pointer;
  font-size:13px;transition:all .2s
}
.sidebar-user .logout-btn:hover{background:var(--bg-elevated);color:var(--red);border-color:var(--red)}

/* Sidebar mobile overlay */
.sidebar-overlay{display:none}
@media(max-width:768px){
  .site-sidebar{transform:translateX(-100%)}
  .site-sidebar.open{transform:translateX(0)}
  .sidebar-overlay{
    display:none;position:fixed;inset:0;z-index:99;
    background:rgba(0,0,0,0.6)
  }
  .sidebar-overlay.show{display:block}
  .footer-grid{grid-template-columns:1fr;text-align:center;gap:20px}
  .footer-grid a{justify-self:center}
  .footer-brand{justify-content:center}
}
.sidebar-toggle{display:none}
@media(max-width:768px){
  .sidebar-toggle{
    display:flex;position:fixed;top:12px;left:12px;z-index:101;
    width:36px;height:36px;border-radius:8px;
    background:var(--bg-card);border:1px solid var(--border);
    color:var(--text);align-items:center;justify-content:center;
    cursor:pointer;font-size:18px
  }
}

/* === Hero === */
.hero{
  text-align:center;padding:80px clamp(20px,5vw,48px) 48px;
  position:relative;overflow:hidden
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 60% 50% at 50% 0%,rgba(99,102,241,0.1),transparent 70%);
  pointer-events:none
}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 14px;
  border-radius:100px;background:rgba(99,102,241,0.12);border:1px solid rgba(99,102,241,0.2);
  font-size:12px;font-weight:600;color:var(--accent);margin-bottom:24px
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green);animation:pulse 2s infinite}
@media(prefers-reduced-motion:no-preference){
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.4}}
}
.hero h1{margin-bottom:16px;max-width:800px;margin-left:auto;margin-right:auto}
.hero p{font-size:clamp(15px,2vw,17px);color:var(--text-dim);max-width:580px;margin:0 auto 32px;line-height:1.7}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.hero-visual{
  margin:48px auto 0;max-width:900px;
  border-radius:var(--radius-lg);border:1px solid var(--border);
  background:var(--bg-card);overflow:hidden;
  box-shadow:var(--shadow-lg),var(--shadow-glow)
}
.hero-terminal{
  padding:22px 26px;font-family:var(--font-mono);font-size:13px;
  line-height:1.9;color:#a5b4fc;overflow-x:auto
}
.hero-terminal .prompt{color:var(--teal);font-weight:700}
.hero-terminal .cmd{color:var(--text)}
.hero-terminal .dim{color:var(--text-muted)}
.hero-terminal .ok{color:var(--green)}
.hero-terminal .warn{color:var(--warm)}

/* === Stats bar === */
.stats-bar{
  display:flex;justify-content:center;gap:clamp(24px,5vw,60px);flex-wrap:wrap;
  padding:32px clamp(20px,5vw,48px);border-top:1px solid var(--border);
  max-width:1000px;margin:0 auto
}
.stat{text-align:center}
.stat-value{font-size:clamp(1.6rem,3vw,2rem);font-weight:800;color:var(--text)}
.stat-label{font-size:12px;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:0.5px}

/* === Section === */
.section{padding:60px clamp(20px,5vw,40px);max-width:1100px;margin:0 auto}
.section-header{text-align:center;margin-bottom:40px}
.section-header .eyebrow{
  display:inline-block;font-size:11px;font-weight:700;text-transform:uppercase;
  letter-spacing:1px;color:var(--accent);margin-bottom:12px
}
.section-header h2{margin-bottom:12px}
.section-header p{color:var(--text-dim);font-size:15px;max-width:500px;margin:0 auto}

/* === Bento Grid === */
.bento-grid{
  display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:auto;
  gap:16px
}
.bento-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:clamp(20px,3vw,28px);
  position:relative;overflow:hidden
}
@media(prefers-reduced-motion:no-preference){
  .bento-card{transition:border-color .25s,transform .25s,box-shadow .25s}
  .bento-card:hover{transform:translateY(-2px)}
}
.bento-card:hover{border-color:var(--border-light);box-shadow:var(--shadow),var(--shadow-glow)}
.bento-card.col-2{grid-column:span 2}
.bento-card.row-2{grid-row:span 2}
.bento-card .card-icon{
  width:42px;height:42px;border-radius:var(--radius);display:grid;place-items:center;
  font-size:20px;margin-bottom:18px
}
.bento-card h3{font-size:1.05rem;margin-bottom:6px}
.bento-card p{font-size:13px;color:var(--text-dim);line-height:1.65}

/* === Tutorial cards === */
.tutorial-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px
}
.tutorial-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;transition:border-color .2s
}
.tutorial-card:hover{border-color:var(--border-light)}
.tutorial-card .step{display:inline-block;font-size:11px;font-weight:700;color:var(--accent);margin-bottom:8px;text-transform:uppercase}
.tutorial-card h4{font-size:14px;margin-bottom:6px}
.tutorial-card p{font-size:13px;color:var(--text-dim);line-height:1.6}

/* === Pricing === */
.pricing-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));
  gap:20px;max-width:900px;margin:0 auto
}
.pricing-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,32px);transition:border-color .3s;
  position:relative
}
.pricing-card.popular{border-color:var(--accent);box-shadow:0 0 32px rgba(99,102,241,0.08)}
.pricing-card.popular::before{
  content:'最受欢迎';position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--accent),#818cf8);color:#fff;
  font-size:11px;font-weight:700;padding:3px 16px;border-radius:100px
}
.pricing-tier{font-size:13px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:16px}
.pricing-price{font-size:42px;font-weight:800;line-height:1}
.pricing-price small{font-size:14px;font-weight:400;color:var(--text-muted)}
.pricing-desc{font-size:14px;color:var(--text-dim);margin:8px 0 24px}
.pricing-features{list-style:none;margin-bottom:24px}
.pricing-features li{padding:7px 0;font-size:13px;color:var(--text-dim);display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--border)}
.pricing-features li:last-child{border-bottom:0}
.pricing-features .check{color:var(--green)}
.pricing-features .muted{color:var(--text-muted);opacity:.5}

/* === Auth Pages === */
.auth-page{display:flex;justify-content:center;align-items:center;min-height:calc(100vh - 140px);padding:40px 20px}
.auth-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(28px,4vw,40px);width:100%;max-width:420px
}
.auth-card h1{font-size:1.5rem;margin-bottom:6px}
.auth-card .sub{font-size:14px;color:var(--text-dim);margin-bottom:24px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-dim);margin-bottom:6px}
.form-group input{
  width:100%;padding:10px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--bg);color:var(--text);
  font-size:14px;transition:border-color .2s
}
.form-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.form-error{color:var(--red);font-size:13px;margin-bottom:12px;display:none}
.form-success{color:var(--green);font-size:13px;margin-bottom:12px;display:none}
.pw-bar-bg{height:4px;background:var(--border);border-radius:2px;margin-top:4px;overflow:hidden}
.pw-bar-fill{height:100%;border-radius:2px;transition:width .3s,background .3s}
.pw-bar-fill.weak{background:var(--red)}
.pw-bar-fill.medium{background:var(--warm)}
.pw-bar-fill.strong{background:var(--green)}
.auth-link{text-align:center;margin-top:16px;font-size:13px;color:var(--text-dim)}
.auth-link a{color:var(--accent);font-weight:600}
.auth-link a:hover{text-decoration:underline}

/* === Dashboard === */
.dashboard{padding:40px clamp(20px,5vw,40px);max-width:900px;margin:0 auto}
.dash-header{margin-bottom:32px}
.dash-header h1{font-size:1.6rem;margin-bottom:4px}
.dash-header p{font-size:14px;color:var(--text-dim)}
.dash-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:28px}
.dash-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px
}
.dash-card .label{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:8px}
.dash-card .value{font-size:1.6rem;font-weight:800;margin-bottom:4px}
.dash-card .sub{font-size:12px;color:var(--text-dim)}
.badge{display:inline-block;padding:2px 10px;border-radius:100px;font-size:11px;font-weight:700}
.badge-free{background:rgba(100,116,139,0.15);color:var(--text-dim)}
.badge-pro{background:rgba(245,158,11,0.15);color:var(--warm)}
.badge-admin{background:rgba(239,68,68,0.15);color:#ef4444}
.badge-active{background:rgba(34,197,94,0.12);color:var(--green)}

.quick-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.qa-card{background:var(--bg-card);border:1px solid var(--border);padding:16px 20px;flex:1;min-width:0;border-radius:var(--radius);text-align:center;text-decoration:none;color:inherit}
.qa-card:hover{background:var(--bg-elevated)}
.qa-icon{margin-bottom:6px;color:var(--accent)}
.qa-title{font-weight:700;font-size:14px}
.qa-sub{font-size:12px;color:var(--text-muted)}
@media (max-width:480px){
  .qa-card{flex:1 1 100%}
}

/* === Acting/Proxy page === */
.proxy-page{padding:40px clamp(20px,5vw,40px);max-width:700px;margin:0 auto}
.proxy-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,28px);margin-bottom:16px
}
.proxy-card h2{font-size:1.1rem;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.proxy-card p{font-size:13px;color:var(--text-dim);line-height:1.7}
.url-bar{display:flex;gap:8px;margin-top:12px}
.url-bar input{
  flex:1;padding:10px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:14px;
  font-family:var(--font-mono)
}
.url-bar input:focus{border-color:var(--accent)}
#proxyResult{margin-top:14px;display:none}
#proxyResult iframe{width:100%;height:480px;border:1px solid var(--border);border-radius:var(--radius);background:#fff}
.sub-link{font-family:var(--font-mono);font-size:13px;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);word-break:break-all;margin:8px 0}

/* === Footer === */
.site-footer{
  padding:48px clamp(20px,5vw,40px) 28px;
  border-top:1px solid var(--border);background:var(--bg)
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;
  max-width:1100px;margin:0 auto
}
.footer-grid p{font-size:13px;color:var(--text-dim);line-height:1.65;margin-top:10px}
.footer-grid h4{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:14px}
.footer-grid a{display:block;font-size:13px;color:var(--text-dim);padding:5px 0;transition:color .2s}
.footer-grid a:hover{color:var(--text)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.footer-bottom{
  max-width:1100px;margin:28px auto 0;padding-top:20px;
  border-top:1px solid var(--border);text-align:center;
  font-size:12px;color:var(--text-muted)
}

/* === Mobile bottom nav === */
.mobile-nav{
  display:none;
  position:fixed;bottom:0;left:0;right:0;z-index:90;
  background:rgba(11,15,25,0.95);backdrop-filter:blur(20px);
  border-top:1px solid var(--border);padding:6px 0 calc(6px + env(safe-area-inset-bottom))
}
.mobile-nav a{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:6px 12px;font-size:10px;color:var(--text-muted);font-weight:600
}
.mobile-nav a.active{color:var(--accent)}
.mobile-nav .nav-icon{font-size:18px}

/* === Utility === */
.hidden{display:none!important}
.text-center{text-align:center}
.mt-16{margin-top:16px}
.mb-16{margin-bottom:16px}

/* === Responsive === */
@media(max-width:768px){
  .bento-grid{grid-template-columns:1fr 1fr}
  .bento-card.col-2{grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:40px 16px}
  .mobile-nav{display:flex;justify-content:space-around}
  .dash-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:480px){
  .hero{padding:48px 16px 32px}
  .hero h1{font-size:1.8rem}
  .bento-grid{grid-template-columns:1fr}
  .bento-card.col-2{grid-column:span 1}
  .pricing-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  body{padding-bottom:64px} /* space for mobile nav */
}