/* Tony Lan — site stylesheet */

:root{
  --bg: #0b0d12;
  --bg-soft: #12151c;
  --card: #161a23;
  --border: #232837;
  --text: #e8eaf0;
  --text-dim: #9aa1b2;
  --accent: #6ee7c8;
  --accent-2: #7c9bff;
  --gradient: linear-gradient(120deg, #6ee7c8 0%, #7c9bff 100%);
  --radius: 14px;
  --maxw: 880px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--accent-2); text-decoration:none;}
a:hover{text-decoration:underline;}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px;}

/* Header */
header.site{
  border-bottom:1px solid var(--border);
  position:sticky; top:0; z-index:20;
  background:rgba(11,13,18,0.85);
  backdrop-filter:blur(10px);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  max-width:var(--maxw); margin:0 auto; padding:16px 24px;
}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:1.05rem; color:var(--text);}
.brand:hover{text-decoration:none;}
.logo{
  width:34px; height:34px; border-radius:9px;
  background:var(--gradient);
  display:flex; align-items:center; justify-content:center;
  font-weight:800; color:#0b0d12; font-size:0.85rem; letter-spacing:0.5px;
}
.nav-links{display:flex; gap:24px; align-items:center;}
.nav-links a{color:var(--text-dim); font-size:0.95rem; font-weight:500;}
.nav-links a:hover{color:var(--text); text-decoration:none;}
.nav-links a.cta{
  color:#0b0d12; background:var(--gradient); padding:8px 16px; border-radius:100px; font-weight:600;
}
.nav-links a.cta:hover{opacity:0.9; text-decoration:none;}

/* Profile photo */
.profile-photo{
  width:148px; height:148px; border-radius:50%; margin-bottom:24px;
  overflow:hidden; display:block;
}
.profile-photo img{width:100%; height:100%; display:block;}

/* Hero */
.hero{padding:88px 0 64px; position:relative; overflow:hidden;}
.hero-bg{
  position:absolute; inset:0; z-index:0;
  background-image:url("hero-bg.png");
  background-size:cover; background-position:center;
  opacity:0.5;
}
.hero .wrap{position:relative; z-index:1;}
.eyebrow{
  display:inline-block; text-transform:uppercase; letter-spacing:1.5px; font-size:0.75rem;
  color:var(--accent); font-weight:700; margin-bottom:18px;
}
.hero h1{
  font-size:clamp(2.1rem, 5vw, 3.2rem); line-height:1.15; margin:0 0 20px; letter-spacing:-0.02em;
}
.hero h1 .accent{
  background:var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lede{font-size:1.15rem; color:var(--text-dim); max-width:640px; margin:0 0 32px;}
.hero-ctas{display:flex; gap:14px; flex-wrap:wrap;}
.btn{
  display:inline-flex; align-items:center; gap:8px; padding:12px 22px; border-radius:100px;
  font-weight:600; font-size:0.95rem; border:1px solid var(--border);
}
.btn-primary{background:var(--gradient); color:#0b0d12; border:none;}
.btn-primary:hover{opacity:0.9; text-decoration:none;}
.btn-ghost{color:var(--text); background:transparent;}
.btn-ghost:hover{border-color:var(--accent-2); text-decoration:none;}

/* Stats row */
.stats{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:56px;}
.stat{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius); padding:22px;
}
.stat .num{font-size:1.7rem; font-weight:800; background:var(--gradient); -webkit-background-clip:text; background-clip:text; color:transparent;}
.stat .label{color:var(--text-dim); font-size:0.88rem; margin-top:4px;}

/* Sections */
section{padding:56px 0;}
section.alt{background:var(--bg-soft); border-top:1px solid var(--border); border-bottom:1px solid var(--border);}
.section-head{margin-bottom:32px;}
.section-head h2{font-size:1.6rem; margin:0 0 8px; letter-spacing:-0.01em;}
.section-head p{color:var(--text-dim); margin:0; max-width:600px;}

/* Cards / posts grid */
.grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); gap:18px;}
.card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius); padding:24px;
  display:flex; flex-direction:column; gap:10px; transition:border-color .15s, transform .15s;
}
.card:hover{border-color:var(--accent-2); transform:translateY(-2px);}
.card .tag{color:var(--accent); font-size:0.75rem; font-weight:700; text-transform:uppercase; letter-spacing:0.6px;}
.card h3{margin:0; font-size:1.15rem; line-height:1.35;}
.card p{margin:0; color:var(--text-dim); font-size:0.92rem;}
.card .meta{color:var(--text-dim); font-size:0.8rem; margin-top:auto; padding-top:8px;}
.card a.stretched{position:absolute; inset:0;}
.card{position:relative;}

/* Timeline / experience */
.timeline{border-left:2px solid var(--border); padding-left:24px; display:flex; flex-direction:column; gap:28px;}
.tl-item{position:relative;}
.tl-item::before{
  content:""; position:absolute; left:-31px; top:4px; width:12px; height:12px; border-radius:50%;
  background:var(--gradient);
}
.tl-item h3{margin:0 0 4px; font-size:1.05rem;}
.tl-item .role{color:var(--text-dim); font-size:0.9rem; margin-bottom:6px;}
.tl-item p{margin:0; color:var(--text-dim); font-size:0.93rem;}

.pill-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:8px;}
.pill{
  border:1px solid var(--border); border-radius:100px; padding:6px 14px; font-size:0.82rem; color:var(--text-dim);
}

/* Achievements list */
.check-list{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:14px;}
.check-list li{padding-left:28px; position:relative; color:var(--text-dim);}
.check-list li::before{
  content:"✓"; position:absolute; left:0; top:0; color:var(--accent); font-weight:800;
}

/* Contact */
.contact-box{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  padding:36px; text-align:center;
}
.contact-box h2{margin:0 0 10px;}
.contact-box p{color:var(--text-dim); margin:0 0 22px;}
.social-row{display:flex; justify-content:center; gap:14px; margin-top:22px; flex-wrap:wrap;}
.social-row a{
  border:1px solid var(--border); border-radius:100px; padding:9px 18px; color:var(--text); font-size:0.9rem;
}
.social-row a:hover{border-color:var(--accent-2); text-decoration:none;}

/* Article / post pages */
.post-header{padding:64px 0 24px;}
.post-header .tag{color:var(--accent); font-size:0.8rem; font-weight:700; text-transform:uppercase; letter-spacing:0.6px;}
.post-header h1{font-size:clamp(1.8rem,4vw,2.6rem); margin:14px 0 10px; letter-spacing:-0.02em;}
.post-header .meta{color:var(--text-dim); font-size:0.92rem;}
.post-body{max-width:720px; margin:0 auto; padding-bottom:60px;}
.post-body h3{margin-top:34px; font-size:1.2rem;}
.post-body p{color:#d3d7e2;}
.post-body ol, .post-body ul{color:#d3d7e2; padding-left:22px;}
.post-body .callout{
  background:var(--card); border:1px solid var(--border); border-left:3px solid var(--accent);
  border-radius:8px; padding:18px 20px; margin:20px 0; color:var(--text-dim); font-size:0.93rem;
}
.refs{margin-top:36px; padding-top:20px; border-top:1px solid var(--border);}
.refs h4{color:var(--text-dim); font-size:0.85rem; text-transform:uppercase; letter-spacing:0.6px; margin-bottom:10px;}
.refs ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:6px; font-size:0.88rem;}

/* Footer */
footer{border-top:1px solid var(--border); padding:32px 0; margin-top:20px;}
.footer-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;}
.footer-row .copy{color:var(--text-dim); font-size:0.85rem;}
.footer-row .flinks{display:flex; gap:16px;}
.footer-row .flinks a{color:var(--text-dim); font-size:0.85rem;}
.footer-row .flinks a:hover{color:var(--text);}

/* Mobile nav toggle */
.nav-toggle{display:none; background:none; border:1px solid var(--border); border-radius:8px; color:var(--text); padding:8px 10px; cursor:pointer;}

@media (max-width: 680px){
  .nav-links{
    position:fixed; top:65px; left:0; right:0; background:var(--bg);
    border-bottom:1px solid var(--border); flex-direction:column; align-items:flex-start;
    padding:18px 24px; gap:16px; display:none;
  }
  .nav-links.open{display:flex;}
  .nav-toggle{display:block;}
  .stats{grid-template-columns:1fr;}
}