/* ===========================================================
   TOKENS
=========================================================== */
:root{
  --bg: #0a0a0b;
  --bg-elevated: #111113;
  --bg-card: #151517;
  --border: #26262b;
  --border-strong: #3a3a40;
  --text: #f4f3ef;
  --text-dim: #9b9ba1;
  --text-faint: #5c5c63;
  --accent: #ffb020;
  --accent-soft: rgba(255,176,32,0.14);
  --accent-line: rgba(255,176,32,0.35);

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

  --container: 1180px;
  --radius: 2px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

a{ color: inherit; text-decoration: none; }
ul{ list-style:none; margin:0; padding:0; }
.mono{ font-family: var(--font-mono); }
strong{ font-weight:600; color: var(--text); }
.accent{ color: var(--accent); }

::selection{ background: var(--accent); color:#0a0a0b; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* subtle grain/scanline overlay for texture */
.grain{
  position: fixed;
  inset:0;
  pointer-events:none;
  z-index: 999;
  opacity: 0.035;
  background-image: repeating-linear-gradient(0deg, #fff 0px, transparent 1px, transparent 2px);
  mix-blend-mode: overlay;
}

.section-inner, .nav-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===========================================================
   NAV
=========================================================== */
.nav{
  position: fixed;
  top:0; left:0; right:0;
  z-index: 100;
  background: rgba(10,10,11,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 64px;
}
.logo{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.04em;
}
.logo span.logo-dot{ color: var(--accent); }
.nav-links{
  display:flex;
  gap: 32px;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.nav-links a{ color: var(--text-dim); transition: color .15s; }
.nav-links a:hover{ color: var(--text); }
.nav-cta{
  border:1px solid var(--border-strong);
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--text) !important;
}
.nav-cta:hover{ border-color: var(--accent); color: var(--accent) !important; }
.uptime{ font-size:11px; color: var(--text-faint); letter-spacing: 0.05em; }
.nav-toggle{ display:none; }

@media (max-width: 820px){
  .nav-meta{ display:none; }
  .nav-toggle{
    display:flex; 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; }
  .nav-links{
    position:absolute; top:64px; left:0; right:0;
    background: var(--bg-elevated);
    border-bottom:1px solid var(--border);
    flex-direction:column; gap:0;
    max-height:0; overflow:hidden; transition: max-height .25s ease;
  }
  .nav-links.open{ max-height: 260px; }
  .nav-links a{ padding: 16px 28px; border-bottom:1px solid var(--border); }
}

/* ===========================================================
   HERO
=========================================================== */
.hero{
  position:relative;
  min-height: 100vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding: 120px 28px 60px;
  overflow:hidden;
}
.hero-grid{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
}
.hero-tree{
  position:absolute;
  right: -120px;
  top: 50%;
  transform: translateY(-50%);
  width: 720px;
  height: 720px;
  opacity: 0.16;
  pointer-events:none;
}
.tree-edges path{ stroke: var(--accent); }
.tree-nodes circle{ fill: var(--accent); }

.hero-inner{
  position:relative;
  z-index:2;
  max-width: var(--container);
  width:100%;
  margin: 0 auto;
}
.eyebrow{
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 18px;
}
.hero-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
  max-width: 820px;
}
.hero-sub{
  max-width: 620px;
  color: var(--text-dim);
  font-size: 17px;
  margin: 0 0 36px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 13px 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all .15s ease;
}
.btn-primary{ background: var(--accent); color: #0a0a0b; }
.btn-primary:hover{ background:#ffc34d; transform: translateY(-1px); }
.btn-ghost{ border: 1px solid var(--border-strong); color: var(--text); }
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

/* Terminal */
.terminal{
  position: relative;
  z-index:2;
  max-width: 640px;
  margin: 56px auto 0;
  width:100%;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,176,32,0.04);
  overflow:hidden;
}
.terminal-bar{
  display:flex; align-items:center; gap:8px;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.dot{ width:10px; height:10px; border-radius:50%; display:inline-block; }
.dot-r{ background:#ff5f57; } .dot-y{ background:#febc2e; } .dot-g{ background:#28c840; }
.terminal-title{ margin-left: 10px; font-size:12px; color: var(--text-faint); }
.terminal-body{
  padding: 16px 18px 0;
  min-height: 170px;
  max-height: 260px;
  overflow-y:auto;
  font-size: 13.5px;
  color: var(--text-dim);
}
.terminal-body .line{ margin: 0 0 8px; white-space: pre-wrap; }
.terminal-body .echo{ color: var(--text); }
.terminal-body .echo::before{ content:"sushanth@portfolio:~$ "; color: var(--accent); }
.terminal-body .accent-text{ color: var(--accent); }
.terminal-input-row{
  display:flex; align-items:center; gap:8px;
  padding: 12px 18px 16px;
  font-size: 13.5px;
}
.prompt{ color: var(--accent); flex-shrink:0; }
#termInput{
  flex:1;
  background: transparent;
  border:none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13.5px;
  outline:none;
}
.cursor{ color: var(--accent); animation: blink 1s steps(1) infinite; }
@keyframes blink{ 50%{ opacity:0; } }

.scroll-cue{
  position:absolute;
  bottom: 28px;
  left:50%;
  transform: translateX(-50%);
  background:none; border:none; cursor:pointer;
  color: var(--text-faint);
  font-size: 11px;
  letter-spacing: 0.15em;
  display:flex; align-items:center; gap:6px;
  z-index:2;
}
.scroll-cue span{ display:inline-block; animation: bob 1.6s ease-in-out infinite; }
@keyframes bob{ 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(4px); } }

/* ===========================================================
   MARQUEE
=========================================================== */
.marquee-wrap{
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  overflow:hidden;
}
.marquee{ overflow:hidden; }
.marquee-track{
  display:flex;
  gap: 14px;
  white-space:nowrap;
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  animation: scroll-left 32s linear infinite;
}
.marquee-track span:nth-child(odd){ color: var(--accent); }
@keyframes scroll-left{
  from{ transform: translateX(0); }
  to{ transform: translateX(-50%); }
}

/* ===========================================================
   SECTIONS — SHARED
=========================================================== */
.section{ padding: 110px 0; }
.section-alt{ background: var(--bg-elevated); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.section-tag{
  font-size: 12.5px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin: 0 0 14px;
}
.section-title{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.08;
  max-width: 760px;
  margin: 0 0 48px;
}

.reveal{ opacity:0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible{ opacity:1; transform: translateY(0); }

/* ===========================================================
   ABOUT
=========================================================== */
.about-grid{
  display:grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
}
.about-copy p{ color: var(--text-dim); margin: 0 0 18px; }
.about-copy p strong{ color: var(--text); }
.boot-log{ border-left: 1px solid var(--border-strong); padding-left: 24px; }
.boot-log li{ font-size: 13px; color: var(--text-dim); margin-bottom: 18px; line-height:1.6; }
.boot-log li:last-child{ margin-bottom:0; }
.log-tag{ color: var(--accent); margin-right: 6px; }
.log-badge{
  font-family: var(--font-mono);
  font-size: 10px;
  border: 1px solid var(--border-strong);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 6px;
  color: var(--text-dim);
}

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

/* ===========================================================
   PROJECTS
=========================================================== */
.project-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.project-card{
  background: var(--bg);
  padding: 36px;
  position: relative;
  transition: background .2s ease;
}
.project-card:hover{ background: var(--bg-card); }
.project-card::before{
  content:"";
  position:absolute; top:14px; left:14px; right:14px; bottom:14px;
  border: 1px solid transparent;
  transition: border-color .2s ease;
  pointer-events:none;
}
.project-card:hover::before{ border-color: var(--accent-line); }
.project-head{ display:flex; justify-content:space-between; margin-bottom: 18px; font-size: 11.5px; }
.project-index{ color: var(--accent); }
.project-stack{ color: var(--text-faint); }
.project-card h3{
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  margin: 0 0 6px;
}
.project-tagline{ color: var(--text); font-size: 15px; margin: 0 0 16px; font-weight:500; }
.project-desc{ color: var(--text-dim); font-size: 14px; margin: 0 0 22px; }
.project-metrics{
  display:flex;
  gap: 22px;
  margin-bottom: 22px;
  flex-wrap:wrap;
}
.project-metrics div{ display:flex; flex-direction:column; }
.project-metrics strong{ color: var(--accent); font-size: 16px; }
.project-metrics span{ color: var(--text-faint); font-size: 10.5px; letter-spacing: 0.03em; }
.tag-row{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom: 22px; }
.tag-row span{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  padding: 4px 9px;
  border-radius: 3px;
}
.project-link{
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
  transition: color .15s, border-color .15s;
}
.project-link:hover{ color: var(--accent); border-color: var(--accent); }

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

/* ===========================================================
   ARCHITECTURE DIAGRAM
=========================================================== */
.arch-diagram{ position:relative; }
.arch-label{
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin: 0 0 14px;
  text-transform: uppercase;
}
.arch-row{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.arch-row + .arch-connector{ }
.arch-connector{
  height: 32px;
  width: 1px;
  background: var(--border-strong);
  margin: 8px auto;
}
.arch-panel{
  border: 1px solid var(--border);
  background: var(--bg-card);
  padding: 24px;
}
.arch-panel h4{
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 16px;
}
.arch-panel .tag-row{ margin-bottom: 0; }
.arch-panel .tag-row span{ font-size: 10.5px; padding: 3px 8px; }
@media (max-width: 1024px){
  .arch-row{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px){
  .arch-row{ grid-template-columns: 1fr; gap: 16px; }
  .arch-connector{ display:none; }
}

/* ===========================================================
   EXPERIENCE LOG
=========================================================== */
.exp-list{ display:flex; flex-direction:column; gap: 40px; }
.exp-item{ display:grid; grid-template-columns: 180px 1fr; gap: 32px; }
.exp-time{ font-size: 12.5px; color: var(--text-faint); }
.exp-body h3{ font-size: 19px; margin: 0 0 14px; }
.exp-body ul{ display:flex; flex-direction:column; gap: 10px; }
.exp-body li{ color: var(--text-dim); font-size: 14px; padding-left: 16px; position:relative; }
.exp-body li::before{ content:"›"; position:absolute; left:0; color: var(--accent); }
@media (max-width: 700px){
  .exp-item{ grid-template-columns: 1fr; gap: 10px; }
}

/* ===========================================================
   CONTACT
=========================================================== */
.contact-section{ text-align:center; }
.contact-title{
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.05;
  max-width: 760px;
  margin: 0 auto 20px;
}
.contact-sub{ color: var(--text-dim); max-width: 480px; margin: 0 auto 40px; }
.contact-actions{ display:flex; gap: 16px; justify-content:center; flex-wrap:wrap; }

/* ===========================================================
   FOOTER
=========================================================== */
.footer{ border-top: 1px solid var(--border); padding: 28px; }
.footer-inner{
  max-width: var(--container);
  margin: 0 auto;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap: 10px;
  font-size: 11.5px;
  color: var(--text-faint);
}