/* ============================================================
   PORTFOLIO — design system
   Palette drawn from an open-cast bench: coal, overburden,
   excavated ochre earth, and hazard-tape amber.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Big+Shoulders+Display:wght@600;700;800&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --coal:      #121310;
  --coal-2:    #1b1d18;
  --panel:     #1f231e;
  --panel-2:   #262b22;
  --line:      rgba(237,231,218,0.10);
  --line-2:    rgba(237,231,218,0.18);
  --paper:     #ECE7DA;
  --paper-dim: #B9B2A0;
  --muted:     #8A8375;
  --amber:     #F0A93A;
  --amber-dim: rgba(240,169,58,0.14);
  --rust:      #C1682E;
  --rust-dim:  rgba(193,104,46,0.16);

  --font-display: 'Big Shoulders Display', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --maxw: 1080px;
  --pad: clamp(20px, 5vw, 56px);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; }
}

body{
  background:var(--coal);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }

::selection{ background:var(--amber); color:var(--coal); }

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
}

/* ---------------- layout helpers ---------------- */
.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--amber);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px;
  background:var(--amber);
  display:inline-block;
}

.section-title{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(30px, 5vw, 46px);
  line-height:1.05;
  letter-spacing:0.01em;
  color:var(--paper);
  margin-top:10px;
}

.section-lede{
  color:var(--paper-dim);
  max-width:56ch;
  margin-top:14px;
  font-size:15.5px;
}

section{
  padding:88px 0;
  border-top:1px solid var(--line);
  position:relative;
}

/* RL (reduced level) marker — real surveying vocabulary,
   used here as the section register instead of 01/02/03 */
.rl-tag{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:0.06em;
  position:absolute;
  top:36px;
  right:var(--pad);
  text-align:right;
}
.rl-tag b{ color:var(--paper-dim); font-weight:500; }

/* ---------------- top nav ---------------- */
.nav{
  position:fixed;
  top:0; left:0; right:0;
  z-index:100;
  background:rgba(18,19,16,0.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--pad);
  height:60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.nav-mark{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.08em;
  color:var(--paper);
  display:flex;
  align-items:center;
  gap:8px;
}
.nav-mark .dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--amber);
  display:inline-block;
}
.nav-links{
  display:flex;
  gap:28px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.05em;
  text-transform:uppercase;
}
.nav-links a{
  color:var(--paper-dim);
  transition:color .15s ease;
  padding:4px 0;
  border-bottom:1px solid transparent;
}
.nav-links a:hover{ color:var(--amber); border-color:var(--amber); }

.nav-toggle{
  display:none;
  width:34px; height:34px;
  border:1px solid var(--line-2);
  background:transparent;
  border-radius:4px;
  color:var(--paper);
  cursor:pointer;
  align-items:center;
  justify-content:center;
}

@media (max-width: 720px){
  .nav-links{
    position:fixed;
    top:60px; left:0; right:0;
    background:var(--coal-2);
    border-bottom:1px solid var(--line);
    flex-direction:column;
    gap:0;
    padding:8px var(--pad) 18px;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease, transform .18s ease;
  }
  .nav-links.open{
    opacity:1; transform:translateY(0); pointer-events:auto;
  }
  .nav-links a{ padding:12px 0; border-bottom:1px solid var(--line); width:100%; }
  .nav-toggle{ display:flex; }
}

/* ---------------- hero ---------------- */
.hero{
  padding-top:150px;
  padding-bottom:90px;
  border-top:none;
  min-height:92vh;
  display:flex;
  align-items:center;
  position:relative;
  overflow:hidden;
}

.contours{
  position:absolute;
  inset:0;
  z-index:0;
  opacity:0.55;
  pointer-events:none;
}
.contours svg{ width:100%; height:100%; }
.contours path{
  fill:none;
  stroke:var(--line-2);
  stroke-width:1;
}
.contours path.accent{ stroke:var(--rust-dim); }

.hero-inner{ position:relative; z-index:1; }

.hero-eyebrow{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--amber);
  letter-spacing:0.14em;
  text-transform:uppercase;
  margin-bottom:22px;
}

.hero h1{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(46px, 9.5vw, 96px);
  line-height:0.96;
  letter-spacing:0.005em;
  color:var(--paper);
}
.hero h1 .accent{ color:var(--rust); }

.hero-role{
  font-family:var(--font-mono);
  font-size:clamp(14px, 2.2vw, 17px);
  color:var(--paper-dim);
  margin-top:22px;
  max-width:52ch;
  border-left:2px solid var(--amber);
  padding-left:16px;
}

.hero-desc{
  margin-top:26px;
  color:var(--paper-dim);
  max-width:54ch;
  font-size:16px;
}

.hero-actions{
  display:flex;
  gap:14px;
  margin-top:38px;
  flex-wrap:wrap;
}

.btn{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  padding:14px 24px;
  border-radius:2px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  cursor:pointer;
  border:1px solid var(--line-2);
  transition:transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn:hover{ transform:translateY(-2px); }
.btn-primary{ background:var(--amber); color:var(--coal); border-color:var(--amber); font-weight:600; }
.btn-primary:hover{ background:#f5b654; }
.btn-ghost{ color:var(--paper); background:transparent; }
.btn-ghost:hover{ border-color:var(--amber); color:var(--amber); }

.hero-stats{
  display:grid;
  grid-template-columns:repeat(3,auto);
  gap:clamp(24px,4vw,56px);
  margin-top:64px;
  padding-top:28px;
  border-top:1px solid var(--line);
  max-width:640px;
}
.stat b{
  display:block;
  font-family:var(--font-display);
  font-size:clamp(26px,4vw,36px);
  color:var(--paper);
  font-weight:700;
}
.stat span{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--muted);
  letter-spacing:0.06em;
  text-transform:uppercase;
}

@media (max-width:560px){
  .hero-stats{ grid-template-columns:repeat(2,1fr); }
}

/* ---------------- about ---------------- */
.about-grid{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:56px;
  margin-top:44px;
  align-items:start;
}
@media (max-width:760px){
  .about-grid{ grid-template-columns:1fr; gap:36px; }
}

.about-text p{ color:var(--paper-dim); margin-bottom:16px; font-size:15.5px; }
.about-text strong{ color:var(--paper); font-weight:600; }

.credentials{
  border:1px solid var(--line);
  background:var(--panel);
}
.credential{
  padding:18px 22px;
  border-bottom:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  align-items:baseline;
}
.credential:last-child{ border-bottom:none; }
.credential .label{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--muted);
  letter-spacing:0.05em;
  text-transform:uppercase;
}
.credential .value{
  color:var(--paper);
  font-size:14.5px;
  text-align:right;
  font-weight:500;
}

/* ---------------- experience ---------------- */
.exp-item{
  display:grid;
  grid-template-columns:180px 1fr;
  gap:32px;
  padding:28px 0;
  border-bottom:1px solid var(--line);
}
.exp-item:first-of-type{ border-top:1px solid var(--line); margin-top:44px; }
@media (max-width:640px){
  .exp-item{ grid-template-columns:1fr; gap:8px; }
}
.exp-period{
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--amber);
  letter-spacing:0.04em;
}
.exp-role{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:700;
  color:var(--paper);
  margin-bottom:4px;
}
.exp-org{
  font-size:14px;
  color:var(--paper-dim);
  margin-bottom:14px;
}
.exp-list{ list-style:none; }
.exp-list li{
  position:relative;
  padding-left:18px;
  color:var(--paper-dim);
  font-size:14.5px;
  margin-bottom:8px;
}
.exp-list li::before{
  content:"";
  position:absolute;
  left:0; top:9px;
  width:6px; height:1px;
  background:var(--rust);
}

/* ---------------- skills ---------------- */
.skills-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  margin-top:44px;
}
@media (max-width:680px){
  .skills-grid{ grid-template-columns:1fr; gap:32px; }
}
.skill-col .col-title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:18px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-2);
}
.chip-row{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--paper-dim);
  border:1px solid var(--line-2);
  padding:9px 14px;
  border-radius:2px;
  transition:border-color .15s ease, color .15s ease;
}
.chip:hover{ border-color:var(--rust); color:var(--paper); }

/* ---------------- projects ---------------- */
.projects-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  margin-top:44px;
  background:var(--line);
  border:1px solid var(--line);
}
@media (max-width:720px){
  .projects-grid{ grid-template-columns:1fr; }
}
.project-card{
  background:var(--coal);
  padding:32px;
  display:flex;
  flex-direction:column;
  transition:background .2s ease;
}
.project-card:hover{ background:var(--panel); }
.project-index{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  margin-bottom:16px;
}
.project-title{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:700;
  color:var(--paper);
  margin-bottom:12px;
}
.project-desc{
  color:var(--paper-dim);
  font-size:14.5px;
  margin-bottom:20px;
  flex-grow:1;
}
.project-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.03em;
  color:var(--rust);
  background:var(--rust-dim);
  padding:5px 10px;
  border-radius:2px;
}

/* ---------------- contact ---------------- */
.contact-grid{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:56px;
  margin-top:44px;
}
@media (max-width:760px){
  .contact-grid{ grid-template-columns:1fr; gap:40px; }
}
.contact-info .info-row{
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.contact-info .info-row:first-child{ padding-top:0; }
.contact-info .label{
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.05em;
  margin-bottom:6px;
}
.contact-info .value a{
  color:var(--paper);
  font-size:15.5px;
  transition:color .15s ease;
}
.contact-info .value a:hover{ color:var(--amber); }

.field{ margin-bottom:18px; }
.field label{
  display:block;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:8px;
}
.field input, .field textarea{
  width:100%;
  background:var(--panel);
  border:1px solid var(--line-2);
  color:var(--paper);
  padding:13px 14px;
  font-family:var(--font-body);
  font-size:14.5px;
  border-radius:2px;
  transition:border-color .15s ease;
}
.field input:focus, .field textarea:focus{ border-color:var(--amber); outline:none; }
.field textarea{ resize:vertical; min-height:110px; }

.form-status{
  font-family:var(--font-mono);
  font-size:13px;
  margin-top:14px;
  min-height:18px;
}
.form-status.ok{ color:#8FBF7A; }
.form-status.err{ color:#D97757; }

/* ---------------- footer ---------------- */
footer{
  padding:36px 0 44px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
}
footer .foot-mark{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
}
footer .foot-links{ display:flex; gap:20px; }
footer .foot-links a{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--paper-dim);
}
footer .foot-links a:hover{ color:var(--amber); }