/* ============================================================
   TOKENS
   ============================================================ */
:root{
  --bg:            #0a0e14;
  --bg-elevated:   #11161f;
  --bg-elevated-2: #161d29;
  --border:        #232b38;
  --border-soft:   #1a212c;

  --text:          #eef1f5;
  --text-dim:      #98a1b0;
  --text-faint:    #5c6472;

  --amber:         #e8a23d;
  --amber-soft:    rgba(232,162,61,0.12);
  --teal:          #49c9c0;
  --teal-soft:     rgba(73,201,192,0.12);

  --font-display:  'Space Grotesk', sans-serif;
  --font-body:     'IBM Plex Sans', sans-serif;
  --font-mono:     'IBM Plex Mono', monospace;

  --max-w: 1120px;
  --nav-h: 64px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing: border-box; }

html{
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.mono{ font-family: var(--font-mono); letter-spacing: 0.01em; }

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  color: var(--text);
}

p{ margin: 0; color: var(--text-dim); }

a{ color: inherit; text-decoration: none; }

ul{ margin:0; padding:0; list-style:none; }

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--amber); color:#0a0e14; padding:10px 16px; z-index:200; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; }

:focus-visible{
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position: fixed; top:0; left:0; right:0; height: var(--nav-h);
  display:flex; align-items:center; justify-content:space-between;
  padding: 0 clamp(20px, 5vw, 56px);
  z-index: 100;
  background: rgba(10,14,20,0.7);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled{ border-bottom-color: var(--border-soft); }

.nav-brand{
  font-family: var(--font-display); font-weight:700; font-size:1.05rem;
  display:flex; align-items:center; gap:6px;
}
.nav-brand-dot{
  width:6px; height:6px; border-radius:50%; background: var(--amber);
  box-shadow: 0 0 8px 1px var(--amber);
}

.nav-links{
  display:flex; align-items:center; gap: clamp(16px, 2.4vw, 28px);
  font-size: 0.92rem;
}
.nav-links a{ color: var(--text-dim); transition: color .2s; white-space:nowrap; }
.nav-links a:hover{ color: var(--text); }
.nav-resume{
  color: var(--bg) !important;
  background: var(--amber);
  padding: 8px 14px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.82rem !important;
}
.nav-resume:hover{ filter: brightness(1.08); }

.nav-toggle{
  display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px;
}
.nav-toggle span{ width:22px; height:2px; background:var(--text); display:block; transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 780px){
  .nav-toggle{ display:flex; }
  .nav-links{
    position:fixed; top:var(--nav-h); left:0; right:0;
    flex-direction:column; align-items:flex-start; gap:0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-soft);
    max-height:0; overflow:hidden;
    transition: max-height .35s var(--ease);
  }
  .nav-links.open{ max-height: 420px; }
  .nav-links a{ width:100%; padding: 16px clamp(20px,5vw,56px); border-bottom: 1px solid var(--border-soft); }
  .nav-resume{ margin: 12px clamp(20px,5vw,56px); width: calc(100% - 2 * clamp(20px,5vw,56px)); text-align:center; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position: relative;
  min-height: 100svh;
  display:flex; align-items:center;
  overflow:hidden;
  padding-top: var(--nav-h);
}
#graphCanvas{
  position:absolute; inset:0; width:100%; height:100%; display:block;
}
.hero-scrim{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(10,14,20,0.35) 0%, rgba(10,14,20,0.55) 55%, var(--bg) 100%);
  pointer-events:none;
}
.hero-inner{
  position:relative; z-index:2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 56px);
  width:100%;
}
.eyebrow{
  color: var(--teal); font-size: 0.82rem; margin-bottom: 18px; display:inline-block;
}
.hero-title{
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-role{
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  color: var(--text);
  margin-bottom: 18px;
  font-weight: 500;
}
.role-rotator{
  color: var(--amber);
  border-bottom: 2px solid var(--amber-soft);
  padding-bottom: 1px;
}
.hero-sub{
  max-width: 620px;
  font-size: 1.02rem;
  margin-bottom: 34px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom: 34px; }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 13px 22px;
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform .2s var(--ease), background .2s, border-color .2s, filter .2s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary{ background: var(--amber); color: #14100a; }
.btn-primary:hover{ transform: translateY(-2px); filter: brightness(1.06); }
.btn-ghost{ background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover{ border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }

.hero-links{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }
.hero-links a{ color: var(--text-dim); display:flex; transition: color .2s, transform .2s; }
.hero-links a:hover{ color: var(--teal); transform: translateY(-2px); }

.email-copy{
  display:flex; align-items:center; gap:8px;
  background:none; border:none; color:var(--text-dim); cursor:pointer;
  font-size: 0.85rem; padding:0; transition: color .2s;
}
.email-copy:hover{ color: var(--amber); }

.scroll-cue{
  position:absolute; bottom:28px; left:50%; transform:translateX(-50%);
  width:22px; height:36px; border:1px solid var(--border); border-radius: 12px;
  z-index:2; display:flex; justify-content:center; padding-top:6px;
}
.scroll-cue span{
  width:4px; height:8px; border-radius:2px; background: var(--teal);
  animation: cue 1.8s infinite ease-in-out;
}
@keyframes cue{ 0%{ opacity:1; transform:translateY(0);} 70%{opacity:0; transform:translateY(10px);} 100%{opacity:0;} }

/* ============================================================
   SECTION SHELL
   ============================================================ */
.section{ padding: 120px 0; border-bottom: 1px solid var(--border-soft); scroll-margin-top: var(--nav-h); }
.contact{ scroll-margin-top: var(--nav-h); }
.section-inner{ max-width: var(--max-w); margin:0 auto; padding: 0 clamp(20px, 5vw, 56px); }
.section-kicker{ color: var(--teal); font-size: 0.82rem; margin-bottom: 14px; }
.section-title{ font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin-bottom: 14px; }
.section-lede{ max-width: 560px; margin-bottom: 48px; }

/* reveal-on-scroll */
.reveal{ opacity:0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in{ opacity:1; transform:none; }

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid{
  display:grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items:start;
}
.about-copy{ font-size: 1.08rem; color: var(--text); }
.about-stats{ display:grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.stat{ display:flex; flex-direction:column; gap:6px; }
.stat-num{ font-size: 2rem; color: var(--amber); font-weight:500; }
.stat-label{ font-size: 0.85rem; color: var(--text-faint); }

@media (max-width: 860px){
  .about-grid{ grid-template-columns: 1fr; gap:36px; }
}

/* ============================================================
   EXPERIENCE — route / timeline
   ============================================================ */
.route{ position:relative; padding-left: 34px; margin:0; list-style:none; }
.route::before{
  content:''; position:absolute; left:5px; top:8px; bottom:8px; width:2px;
  background: linear-gradient(180deg, var(--amber), var(--teal) 60%, transparent);
  opacity:0.5;
}
.route-stop{ position:relative; margin-bottom: 44px; }
.route-stop:last-child{ margin-bottom:0; }
.route-marker{
  position:absolute; left:-34px; top:6px; width:12px; height:12px; border-radius:50%;
  background: var(--bg); border: 2px solid var(--amber);
  box-shadow: 0 0 0 4px var(--bg), 0 0 10px 0 var(--amber-soft);
}
.route-card{
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 26px 28px;
  transition: border-color .25s, transform .25s;
}
.route-card:hover{ border-color: var(--border); }
.route-head{ display:flex; flex-wrap:wrap; align-items:baseline; gap: 6px 14px; margin-bottom:14px; }
.route-head h3{ font-size: 1.15rem; }
.route-tag{
  font-family: var(--font-mono); font-size:0.68rem; color: var(--teal);
  border: 1px solid var(--teal); border-radius: 4px; padding: 2px 6px; margin-left:8px; vertical-align:middle;
}
.route-meta{ font-size: 0.82rem; color: var(--text-faint); }
.route-card ul{ display:flex; flex-direction:column; gap:10px; }
.route-card li{
  position:relative; padding-left:18px; font-size:0.95rem; color: var(--text-dim);
}
.route-card li::before{
  content:''; position:absolute; left:0; top:9px; width:6px; height:6px; border-radius:50%; background: var(--teal);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.project-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.project-card{
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 26px;
  display:flex; flex-direction:column; gap:14px;
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.project-card:hover{
  transform: translateY(-4px);
  border-color: var(--teal);
  box-shadow: 0 16px 40px -20px rgba(73,201,192,0.35);
}
.project-top{ display:flex; justify-content:space-between; align-items:flex-start; gap:10px; }
.project-top h3{ font-size:1.08rem; line-height:1.3; }
.project-stat{ font-size:0.72rem; color: var(--amber); white-space:nowrap; padding-top:3px; }
.project-card p{ font-size: 0.92rem; flex-grow:1; }
.project-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.project-tags span{
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 5px; padding: 3px 8px;
}
.project-links{ margin-top:4px; }
.project-links a{ font-family: var(--font-mono); font-size:0.82rem; color: var(--teal); }
.project-links a:hover{ text-decoration:underline; }
.project-note{ font-size: 0.72rem; color: var(--text-faint); }

@media (max-width: 980px){ .project-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px){ .project-grid{ grid-template-columns: 1fr; } }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid{ display:flex; flex-direction:column; gap:32px; }
.skill-group h3{ color: var(--text-faint); font-size:0.82rem; margin-bottom:14px; font-weight:400; text-transform:uppercase; letter-spacing:0.08em; }
.chips{ display:flex; flex-wrap:wrap; gap:10px; }
.chips span{
  font-family: var(--font-mono); font-size: 0.82rem;
  background: var(--bg-elevated); border:1px solid var(--border-soft);
  padding: 7px 13px; border-radius: 7px; color: var(--text-dim);
  transition: border-color .2s, color .2s;
}
.chips span:hover{ border-color: var(--amber); color: var(--text); }

/* ============================================================
   EDUCATION
   ============================================================ */
.edu-card{
  background: var(--bg-elevated); border:1px solid var(--border-soft); border-radius:14px;
  padding: 32px clamp(24px, 4vw, 40px);
}
.edu-head{ display:flex; flex-wrap:wrap; justify-content:space-between; align-items:baseline; gap:8px; margin-bottom:10px; }
.edu-head h3{ font-size:1.2rem; }
.edu-head span{ color: var(--teal); }
.edu-card > p{ margin-bottom:20px; font-size:0.98rem; }

/* ============================================================
   CONTACT / FOOTER
   ============================================================ */
.contact{ padding: 120px 0 60px; text-align:left; }
.contact-title{ font-size: clamp(2rem, 5vw, 3rem); margin-bottom:16px; max-width:640px; }
.contact-sub{ max-width: 520px; margin-bottom:36px; font-size:1.02rem; }
.contact-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:70px; }
.contact-foot{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  padding-top: 24px; border-top: 1px solid var(--border-soft);
  font-size:0.78rem; color: var(--text-faint);
}

/* ============================================================
   TOAST
   ============================================================ */
.toast{
  position: fixed; bottom: 28px; left:50%; transform: translateX(-50%) translateY(20px);
  background: var(--teal); color: #0a0e14; font-family: var(--font-mono); font-size:0.85rem;
  padding: 12px 20px; border-radius: 8px; z-index: 300;
  opacity:0; pointer-events:none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.toast.show{ opacity:1; transform: translateX(-50%) translateY(0); }