:root{
  --ink:#10151C;
  --panel:#1A212B;
  --panel-2:#212A36;
  --rule:#2A3340;
  --paper:#EDEFF2;
  --muted:#8B96A5;
  --gold:#E8B04B;
  --gold-dim:#B98A3A;
  --signal:#4FD1C5;
  --max:1120px;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  background:var(--ink);
  color:var(--paper);
  font-family:'Inter', sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;}
:focus-visible{outline:2px solid var(--signal); outline-offset:3px; border-radius:2px;}

.wrap{max-width:var(--max); margin:0 auto; padding:0 28px;}

h1,h2,h3{font-family:'Space Grotesk', sans-serif; font-weight:600; letter-spacing:-0.01em;}

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

/* Command-bar eyebrow — a nod to the SAP GUI "OK Code" transaction field */
.cmd-tag{
  display:inline-flex; align-items:center; gap:8px;
  font-family:'IBM Plex Mono', monospace;
  font-size:12px; letter-spacing:0.06em;
  color:var(--signal);
  background:rgba(79,209,197,0.08);
  border:1px solid rgba(79,209,197,0.25);
  padding:5px 12px 5px 10px;
  border-radius:3px;
  margin-bottom:18px;
}
.cmd-tag::before{content:'▸'; color:var(--gold);}

/* ===== NAV ===== */
.site-nav{
  position:sticky; top:0; z-index:40;
  border-bottom:1px solid var(--rule);
}
.site-nav::before{
  content:'';
  position:absolute; inset:0;
  background:rgba(16,21,28,0.85);
  backdrop-filter:blur(10px);
  z-index:-1;
}
.nav-inner{
  max-width:var(--max); margin:0 auto; padding:16px 28px;
  display:flex; align-items:center; justify-content:space-between;
}
.nav-brand{
  font-family:'IBM Plex Mono', monospace; font-size:14px; font-weight:500;
  color:var(--paper);
  display:flex; align-items:center; gap:8px;
}
.nav-brand .dot{width:7px; height:7px; border-radius:50%; background:var(--signal); box-shadow:0 0 8px var(--signal);}
.nav-links{display:flex; align-items:center; gap:28px; list-style:none;}
.nav-links a{
  font-size:14px; color:var(--muted); text-decoration:none;
  transition:color 0.15s;
}
.nav-links a:hover{color:var(--paper);}
/* App showcase cards — used on apps.html */
.app-card{
  background:var(--panel); border:1px solid var(--rule); border-radius:6px;
  padding:26px; display:flex; flex-direction:column;
  text-decoration:none; transition:border-color 0.15s, transform 0.15s;
}
.app-card:hover{border-color:var(--gold-dim); transform:translateY(-2px);}
.app-status{
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--signal);
  text-transform:uppercase; letter-spacing:0.06em;
  display:flex; align-items:center; gap:6px;
}
.app-status::before{content:''; width:6px; height:6px; border-radius:50%; background:var(--signal); box-shadow:0 0 6px var(--signal);}
.app-title{font-family:'Space Grotesk', sans-serif; font-size:20px; margin-top:12px; color:var(--paper);}
.app-desc{font-size:14px; color:var(--muted); margin-top:10px; flex:1;}
.app-cta{
  margin-top:20px; font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--paper);
  border-top:1px solid var(--rule); padding-top:16px;
  display:flex; align-items:center; justify-content:space-between;
}
.app-card:hover .app-cta{color:var(--gold);}
.apps-empty-note{
  font-size:13px; color:var(--muted); background:var(--panel);
  border:1px dashed var(--rule); padding:24px; border-radius:6px;
  text-align:center;
}
.nav-toggle{display:none; background:none; border:none; color:var(--paper); font-size:22px; cursor:pointer;}

/* ===== HERO ===== */
.hero{padding:96px 0 80px; position:relative; overflow:hidden;}
.hero-title{
  font-size:clamp(36px, 6vw, 60px);
  line-height:1.05;
  color:var(--paper);
  max-width:820px;
}
.hero-title .accent{color:var(--gold);}
.hero-sub{
  margin-top:20px; font-size:18px; color:var(--muted);
  max-width:600px;
}
.hero-actions{display:flex; gap:14px; margin-top:34px; flex-wrap:wrap;}
.btn{
  font-family:'Inter', sans-serif; font-weight:600; font-size:14px;
  padding:13px 24px; border-radius:4px; cursor:pointer; text-decoration:none;
  display:inline-flex; align-items:center; gap:8px;
  transition:transform 0.15s, background 0.15s, border-color 0.15s;
}
.btn:hover{transform:translateY(-1px);}
.btn-gold{background:var(--gold); color:#1A1305; border:1px solid var(--gold);}
.btn-gold:hover{background:#F0BD5F;}
.btn-outline{background:transparent; color:var(--paper); border:1px solid var(--rule);}
.btn-outline:hover{border-color:var(--paper);}

/* Architecture strip — signature element */
.arch-strip{
  margin-top:64px;
  display:flex; align-items:center; gap:0;
  overflow-x:auto;
  padding-bottom:8px;
}
.arch-node{
  font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--paper);
  background:var(--panel);
  border:1px solid var(--rule);
  padding:10px 16px;
  border-radius:4px;
  white-space:nowrap;
  flex-shrink:0;
  position:relative;
}
.arch-connector{
  width:36px; height:1px; flex-shrink:0;
  background:linear-gradient(90deg, var(--rule), var(--signal), var(--rule));
  background-size:200% 100%;
  animation:flow 3s linear infinite;
}
@keyframes flow{ from{background-position:200% 0;} to{background-position:-200% 0;} }

/* ===== SECTION SHELL ===== */
section{padding:90px 0;}
.section-head{margin-bottom:44px;}
.section-title{font-size:clamp(26px,3.5vw,34px); color:var(--paper);}

/* ===== ABOUT ===== */
.about-text{max-width:720px; font-size:16px; color:var(--muted);}
.stat-row{display:flex; gap:36px; margin-top:40px; flex-wrap:wrap;}
.stat{border-left:2px solid var(--gold); padding-left:16px;}
.stat-num{font-family:'Space Grotesk', sans-serif; font-size:30px; color:var(--paper); font-weight:600;}
.stat-label{font-size:13px; color:var(--muted); margin-top:2px;}

/* ===== SKILLS ===== */
.skills-grid{display:flex; flex-wrap:wrap; gap:10px;}
.skill-chip{
  font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--paper);
  background:var(--panel);
  border:1px solid var(--rule);
  padding:9px 14px;
  border-radius:3px;
  transition:border-color 0.15s;
}
.skill-chip:hover{border-color:var(--signal);}

/* ===== EXPERIENCE ===== */
.timeline{position:relative; padding-left:28px; border-left:1px solid var(--rule);}
.tl-item{position:relative; padding-bottom:44px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:''; position:absolute; left:-33px; top:4px;
  width:9px; height:9px; border-radius:50%;
  background:var(--ink); border:2px solid var(--gold);
}
.tl-role{font-family:'Space Grotesk', sans-serif; font-size:19px; color:var(--paper); font-weight:600;}
.tl-meta{font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--signal); margin-top:4px;}
.tl-desc{font-size:14.5px; color:var(--muted); margin-top:10px; max-width:680px;}

/* ===== COURSES ===== */
.courses-note{
  font-size:13px; color:var(--muted); background:var(--panel);
  border:1px solid var(--rule); border-left:2px solid var(--gold);
  padding:12px 16px; border-radius:3px; margin-bottom:36px; max-width:680px;
}
.course-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:20px;}
.course-card{
  background:var(--panel); border:1px solid var(--rule); border-radius:6px;
  padding:26px; display:flex; flex-direction:column;
  transition:border-color 0.15s, transform 0.15s;
}
.course-card:hover{border-color:var(--gold-dim); transform:translateY(-2px);}
.course-level{
  font-family:'IBM Plex Mono', monospace; font-size:11px; color:var(--gold);
  text-transform:uppercase; letter-spacing:0.06em;
}
.course-title{font-family:'Space Grotesk', sans-serif; font-size:19px; margin-top:10px; color:var(--paper);}
.course-desc{font-size:14px; color:var(--muted); margin-top:10px; flex:1;}
.course-cta{
  margin-top:20px; font-family:'IBM Plex Mono', monospace; font-size:12.5px;
  color:var(--paper); text-decoration:none;
  border-top:1px solid var(--rule); padding-top:16px;
  display:flex; align-items:center; justify-content:space-between;
}

/* ===== CONTACT ===== */
.contact-box{
  background:var(--panel); border:1px solid var(--rule); border-radius:6px;
  padding:44px; display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
}
.contact-links{display:flex; gap:28px; flex-wrap:wrap;}
.contact-link{text-decoration:none;}
.contact-link .label{font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:0.06em;}
.contact-link .value{font-family:'IBM Plex Mono', monospace; font-size:15px; color:var(--paper); margin-top:4px;}
.contact-link:hover .value{color:var(--gold);}

/* ===== FOOTER ===== */
footer{border-top:1px solid var(--rule); padding:32px 0; }
.footer-row{display:flex; justify-content:space-between; align-items:center; font-size:13px; color:var(--muted); flex-wrap:wrap; gap:12px;}

/* ===== RESPONSIVE ===== */
@media (max-width:860px){
  .course-grid{grid-template-columns:1fr;}
  .stat-row{gap:24px;}
}
@media (max-width:720px){
  .nav-links{
    position:fixed; top:var(--nav-h, 60px); left:0; right:0; bottom:0;
    background:var(--ink); flex-direction:column; align-items:flex-start;
    padding:28px; gap:22px; border-top:1px solid var(--rule);
    transform:translateX(100%); transition:transform 0.2s ease;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-toggle{display:block;}
  .contact-box{flex-direction:column; align-items:flex-start;}
}