/* =====================================================
   Nikola — Portfolio / Build Log
   Blueprint / technical-drawing themed personal site
   ===================================================== */

:root{
  --navy: #0B1E33;
  --navy-2: #0E2A47;
  --navy-3: #10314f;
  --grid: rgba(140,180,220,0.09);
  --grid-strong: rgba(140,180,220,0.18);
  --paper: #EDF1F5;
  --steel: #7C93AC;
  --steel-dim: rgba(124,147,172,0.5);
  --copper: #C97A4A;
  --copper-bright: #e08e5c;
  --copper-dim: rgba(201,122,74,0.25);
  --ok: #6FAE8C;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

body{
  background:var(--navy);
  color:var(--paper);
  font-family:'Inter', sans-serif;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:40px 40px;
  overflow-x:hidden;
}
::selection{ background:var(--copper); color:var(--navy); }

.mono{ font-family:'IBM Plex Mono', monospace; }

/* =====================================================
   Header / nav
   ===================================================== */
header{
  display:flex; justify-content:space-between; align-items:center;
  padding:22px 56px;
  position:sticky; top:0; z-index:60;
  background:rgba(11,30,51,0.85);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--grid-strong);
  transition:padding .3s var(--ease), background .3s;
}
header.scrolled{ padding:14px 56px; background:rgba(11,30,51,0.94); }
header .logo{
  font-family:'Space Grotesk', sans-serif; font-weight:700; font-size:17px; letter-spacing:0.02em;
  display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--paper);
}
header .logo .dot{ width:8px; height:8px; background:var(--copper); border-radius:1px; transform:rotate(45deg); transition:transform .4s var(--ease); }
header .logo:hover .dot{ transform:rotate(225deg); }
header nav{ display:flex; gap:36px; align-items:center; }
header nav a{
  color:var(--steel); text-decoration:none; font-size:13px; font-weight:500;
  transition:color .25s; position:relative;
}
header nav a::after{
  content:''; position:absolute; left:0; bottom:-6px; height:1px; width:0;
  background:var(--copper); transition:width .3s var(--ease);
}
header nav a:hover{ color:var(--paper); }
header nav a:hover::after,
header nav a.active::after{ width:100%; }
header nav a.active{ color:var(--paper); }
header .status{ font-size:11px; color:var(--ok); display:flex; align-items:center; gap:8px; }
header .status::before{ content:''; width:6px; height:6px; border-radius:50%; background:var(--ok); box-shadow:0 0 8px var(--ok); animation:pulse 2.4s infinite; }

@keyframes pulse{
  0%,100%{ opacity:1; box-shadow:0 0 8px var(--ok); }
  50%{ opacity:.55; box-shadow:0 0 2px var(--ok); }
}

/* mobile nav toggle */
.nav-toggle{
  display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; padding:6px;
}
.nav-toggle span{ width:22px; height:2px; background:var(--paper); transition:transform .3s var(--ease), opacity .3s; }
.nav-toggle.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* =====================================================
   Hero
   ===================================================== */
.hero{
  padding:120px 56px 90px;
  max-width:1200px; margin:0 auto;
  position:relative;
}
.hero .tag{
  font-family:'IBM Plex Mono', monospace;
  font-size:12px; color:var(--copper); letter-spacing:0.08em;
  border:1px solid var(--copper-dim); display:inline-block;
  padding:6px 12px; border-radius:2px; margin-bottom:28px;
}
.hero h1{
  font-family:'Space Grotesk', sans-serif;
  font-weight:700;
  font-size:clamp(42px, 6vw, 84px);
  line-height:1.02;
  letter-spacing:-0.01em;
  max-width:900px;
}
.hero h1 .accent{ color:var(--copper); }
.hero .lede{
  margin-top:28px; font-size:17px; color:var(--steel); max-width:580px; line-height:1.7;
}
.hero .ctas{ display:flex; gap:16px; margin-top:44px; flex-wrap:wrap; }

.btn{
  font-family:'IBM Plex Mono', monospace; font-size:13px;
  padding:14px 24px; border-radius:2px; text-decoration:none;
  display:inline-flex; align-items:center; gap:8px;
  transition:all .25s var(--ease); cursor:pointer; border:none;
}
.btn.primary{ background:var(--copper); color:var(--navy); font-weight:500; }
.btn.primary:hover{ background:var(--copper-bright); transform:translateY(-2px); box-shadow:0 8px 24px -8px var(--copper); }
.btn.ghost{ border:1px solid var(--grid-strong); color:var(--paper); background:transparent; }
.btn.ghost:hover{ border-color:var(--steel); transform:translateY(-2px); }

.coord-label{
  position:absolute; top:130px; right:56px;
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--steel);
  text-align:right; line-height:1.8; opacity:0.6;
}
@media (max-width:900px){ .coord-label{ display:none; } }

/* =====================================================
   Section shell
   ===================================================== */
.section{ max-width:1200px; margin:0 auto; padding:100px 56px; border-top:1px solid var(--grid-strong); }
.section-head{ display:flex; justify-content:space-between; align-items:baseline; margin-bottom:56px; flex-wrap:wrap; gap:16px; }
.section-head h2{
  font-family:'Space Grotesk', sans-serif; font-weight:600; font-size:32px;
}
.section-head .idx{ font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--steel); }

/* =====================================================
   About
   ===================================================== */
.about-grid{
  display:grid; grid-template-columns:1.4fr 1fr; gap:56px; align-items:start;
}
.about-copy p{ font-size:16px; color:var(--paper); line-height:1.85; margin-bottom:22px; }
.about-copy p.muted{ color:var(--steel); font-size:15px; }
.about-copy .signature{
  font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--copper);
  letter-spacing:0.05em; margin-top:8px;
}

/* blueprint profile card */
.profile-card{
  border:1px solid var(--grid-strong); background:var(--navy-2);
  padding:28px; position:relative;
}
.profile-card::before{
  content:''; position:absolute; inset:8px; border:1px dashed var(--steel-dim); pointer-events:none;
}
.profile-card .pc-head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--steel);
  letter-spacing:0.06em; margin-bottom:22px; position:relative;
}
.profile-card .pc-head .rev{ color:var(--copper); }
.profile-card dl{ display:grid; grid-template-columns:auto 1fr; gap:14px 18px; position:relative; }
.profile-card dt{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--steel); letter-spacing:0.04em; padding-top:2px; }
.profile-card dd{ font-size:14px; color:var(--paper); text-align:right; }
.profile-card dd .ok{ color:var(--ok); }

/* =====================================================
   What I do — capability cards
   ===================================================== */
.capabilities{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--grid-strong); border:1px solid var(--grid-strong); }
.cap{
  background:var(--navy); padding:32px; position:relative; transition:background .3s;
}
.cap:hover{ background:var(--navy-2); }
.cap .num{
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--copper);
  letter-spacing:0.05em; margin-bottom:18px; display:block;
}
.cap h3{ font-family:'Space Grotesk', sans-serif; font-size:19px; font-weight:600; margin-bottom:12px; }
.cap p{ font-size:14px; color:var(--steel); line-height:1.7; }
@media (max-width:820px){ .capabilities{ grid-template-columns:1fr; } }

/* =====================================================
   Toolkit
   ===================================================== */
.toolkit{ display:grid; grid-template-columns:repeat(2,1fr); gap:40px; }
.tk-group h4{
  font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--copper);
  letter-spacing:0.06em; margin-bottom:18px; padding-bottom:10px;
  border-bottom:1px solid var(--grid-strong);
}
.tk-group .chips{ display:flex; flex-wrap:wrap; gap:10px; }
.tk-group .chips span{
  font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--paper);
  border:1px solid var(--grid-strong); padding:8px 14px; border-radius:2px;
  transition:border-color .25s, transform .25s var(--ease), color .25s;
}
.tk-group .chips span:hover{ border-color:var(--copper); color:var(--copper); transform:translateY(-2px); }
@media (max-width:700px){ .toolkit{ grid-template-columns:1fr; gap:32px; } }

/* =====================================================
   Projects grid
   ===================================================== */
.projects{ display:grid; grid-template-columns:repeat(2, 1fr); gap:1px; background:var(--grid-strong); border:1px solid var(--grid-strong); }
.card{
  background:var(--navy); padding:36px; position:relative;
  transition:background .3s;
}
.card:hover{ background:var(--navy-2); }
.card .rev{
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--copper);
  letter-spacing:0.05em; margin-bottom:16px; display:block;
}
.card h3{ font-family:'Space Grotesk', sans-serif; font-size:22px; font-weight:600; margin-bottom:12px; }
.card p{ font-size:14px; color:var(--steel); line-height:1.7; margin-bottom:24px; }
.card .stack{ display:flex; flex-wrap:wrap; gap:8px; }
.card .stack span{
  font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--paper);
  border:1px solid var(--grid-strong); padding:5px 10px; border-radius:2px;
}
.card .dims{
  position:absolute; top:20px; right:24px;
  font-family:'IBM Plex Mono', monospace; font-size:10px; color:var(--steel); opacity:0.5;
}
@media (max-width:800px){ .projects{ grid-template-columns:1fr; } }

/* =====================================================
   Timeline / build log
   ===================================================== */
.timeline{ position:relative; padding-left:28px; }
.timeline::before{
  content:''; position:absolute; left:4px; top:6px; bottom:6px; width:1px;
  background:var(--grid-strong);
}
.tl-item{ position:relative; padding-bottom:40px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:''; position:absolute; left:-28px; top:5px; width:9px; height:9px;
  background:var(--navy); border:1px solid var(--copper); transform:rotate(45deg);
}
.tl-item .yr{ font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--copper); letter-spacing:0.05em; }
.tl-item h4{ font-family:'Space Grotesk', sans-serif; font-size:18px; font-weight:600; margin:8px 0 8px; }
.tl-item p{ font-size:14px; color:var(--steel); line-height:1.7; max-width:640px; }

/* =====================================================
   Beyond the code — interests
   ===================================================== */
.interests{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--grid-strong); border:1px solid var(--grid-strong); }
.interest{ background:var(--navy); padding:28px; transition:background .3s; }
.interest:hover{ background:var(--navy-2); }
.interest .ic{ font-size:22px; margin-bottom:14px; display:block; }
.interest h4{ font-family:'Space Grotesk', sans-serif; font-size:16px; font-weight:600; margin-bottom:8px; }
.interest p{ font-size:13px; color:var(--steel); line-height:1.65; }
@media (max-width:820px){ .interests{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:460px){ .interests{ grid-template-columns:1fr; } }

/* =====================================================
   Specs strip
   ===================================================== */
.specs{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  background:var(--grid-strong); border:1px solid var(--grid-strong);
}
.spec{ background:var(--navy); padding:28px; text-align:left; }
.spec .val{ font-family:'Space Grotesk', sans-serif; font-size:34px; font-weight:700; color:var(--copper); }
.spec .label{ font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--steel); margin-top:6px; letter-spacing:0.04em; }
@media (max-width:700px){ .specs{ grid-template-columns:repeat(2,1fr); } }

/* =====================================================
   Footer / contact
   ===================================================== */
footer{
  padding:80px 56px 56px; border-top:1px solid var(--grid-strong);
  display:flex; justify-content:space-between; align-items:flex-end; flex-wrap:wrap; gap:24px;
  max-width:1200px; margin:0 auto;
}
footer .big{ font-family:'Space Grotesk', sans-serif; font-size:26px; font-weight:600; max-width:420px; line-height:1.3; }
footer .big .accent{ color:var(--copper); }
footer .foot-sub{ font-size:14px; color:var(--steel); margin-top:14px; max-width:420px; line-height:1.6; }
footer .links{ display:flex; gap:28px; flex-wrap:wrap; }
footer .links a{ color:var(--steel); text-decoration:none; font-size:13px; font-family:'IBM Plex Mono', monospace; transition:color .25s; }
footer .links a:hover{ color:var(--copper); }

.colophon{
  max-width:1200px; margin:0 auto; padding:0 56px 40px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--steel-dim);
}

/* =====================================================
   Scroll reveal
   ===================================================== */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible{ opacity:1; transform:none; }

@media (prefers-reduced-motion:reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
  header .status::before{ animation:none; }
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width:820px){
  header, .hero, .section, footer, .colophon{ padding-left:24px; padding-right:24px; }
  .about-grid{ grid-template-columns:1fr; gap:40px; }
  header nav{
    position:fixed; top:0; right:0; height:100vh; width:min(78vw, 320px);
    flex-direction:column; align-items:flex-start; justify-content:center; gap:28px;
    background:rgba(11,30,51,0.98); padding:56px; z-index:55;
    transform:translateX(100%); transition:transform .4s var(--ease);
    border-left:1px solid var(--grid-strong);
  }
  header nav.open{ transform:translateX(0); }
  header nav a{ font-size:18px; }
  .nav-toggle{ display:flex; z-index:60; }
  header .status{ display:none; }
}