/* =============================================================
   Shashank Adepu — Portfolio
   Design: "Data-Pipeline / Blueprint Schematic" (dark)
   ============================================================= */

/* ---------- Tokens ---------- */
:root {
  --ink: #0B0F14;
  --ink-2: #10161E;
  --ink-3: #161E28;
  --line: #223041;
  --line-bright: #2E4256;
  --text: #E7EEF5;
  --muted: #93A4B7;
  --faint: #7C90A4;
  --signal: #FFB454;
  --signal-dim: rgba(255, 180, 84, .14);
  --wire: #3C566B;

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1400px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --spine-x: 2rem;              /* left position of the bus-line on desktop */
  --radius: 4px;
  --nav-h: 60px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, canvas { max-width: 100%; display: block; }

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
}

p { margin: 0; }

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

/* ---------- Utilities ---------- */
.mono {
  font-family: var(--font-mono);
  font-weight: 400;
  letter-spacing: .02em;
}

.eyebrow {
  color: var(--faint);
  font-size: .78rem;
  text-transform: lowercase;
  letter-spacing: .08em;
  margin: 0 0 .9rem;
}

/* Accessible focus ring on everything interactive */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =============================================================
   NAV
   ============================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(11, 15, 20, .72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  height: var(--nav-h);
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  color: var(--text);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .01em;
}
.nav-brand::before {
  content: "\25C7 ";
  color: var(--signal);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--muted);
  padding: .25rem 0;
  position: relative;
  transition: color .2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 1px;
  background: var(--signal);
  transition: right .25s ease;
}
.nav-link:hover,
.nav-link.active { color: var(--text); }
.nav-link:hover::after,
.nav-link.active::after { right: 0; }

/* hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle-bar {
  width: 20px;
  height: 1.5px;
  background: var(--text);
  margin: 0 auto;
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* =============================================================
   MAIN + SPINE
   ============================================================= */
.main {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* the schematic bus-line — hidden on mobile, shown >=1024 */
.spine { display: none; }

.section {
  position: relative;
  padding: clamp(2.5rem, 5vw, 4.25rem) 0;
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}
.section:first-of-type { padding-top: calc(var(--nav-h) + clamp(2rem, 6vw, 4rem)); }

/* per-section spine node dot (positioned on the bus-line, desktop only) */
.spine-node { display: none; }

/* ---------- Section title ---------- */
.section-title {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  color: var(--text);
  text-align: left;
  letter-spacing: -.01em;
  margin-bottom: 2rem;
}

/* =============================================================
   HERO
   ============================================================= */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.hero-greeting {
  color: var(--muted);
  font-size: .9rem;
  margin: 0 0 .6rem;
}

.hero-name {
  font-size: clamp(2.6rem, 7vw, 5rem);
  color: var(--text);
  letter-spacing: -.02em;
  margin: 0 0 .75rem;
}

.hero-role {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  margin: 0 0 1.25rem;
}

.hero-tagline {
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  max-width: 46ch;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.hero-social {
  display: flex;
  gap: .75rem;
}

/* ---------- Hero terminal ---------- */
.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.terminal--hero {
  margin: 0 0 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
  box-shadow: 0 24px 60px -34px rgba(0, 0, 0, .85);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem .9rem;
  background: var(--ink-3);
  border-bottom: 1px solid var(--line);
}
.terminal-bar .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--wire);
}
.terminal-label {
  margin-left: .6rem;
  color: var(--faint);
  font-size: .74rem;
}
.terminal-body {
  padding: 1.15rem 1.25rem 1.3rem;
  font-size: .92rem;
  line-height: 1.5;
  color: var(--muted);
  min-height: 15.5rem;   /* reserve height so typing doesn't shift the CTA */
}
.t-line { white-space: pre-wrap; word-break: break-word; }
.t-line + .t-line { margin-top: .18rem; }
.t-prompt { color: var(--signal); }
.t-cmd { color: var(--text); }
.t-name {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3.15rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.04;
  letter-spacing: -.015em;
  margin: .25rem 0 .55rem;
}
.t-role { color: var(--text); margin-bottom: .4rem; }
.t-stats {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .95rem;
  margin: .15rem 0 .3rem;
}
.t-stat { color: var(--faint); font-size: .82rem; }
.t-stat b { color: var(--signal); font-weight: 500; }
.t-pitch { color: var(--muted); max-width: 54ch; margin-top: .1rem; }
.t-cursor { color: var(--signal); }
.t-blink { animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .88rem;
  font-weight: 500;
  padding: .7rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn-primary {
  background: var(--signal);
  color: var(--ink);
  border-color: var(--signal);
}
.btn-primary:hover { transform: translateY(-2px); background: #ffc373; }
.btn-ghost,
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line-bright);
}
.btn-ghost:hover,
.btn-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--signal);
  color: var(--signal);
}

/* icon links (social) */
.icon-link,
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 1rem;
  background: var(--ink-2);
  transition: color .2s ease, border-color .2s ease, transform .18s ease;
}
.icon-link:hover,
.social-link:hover {
  color: var(--signal);
  border-color: var(--signal);
  transform: translateY(-2px);
}

/* hero canvas */
.hero-canvas-wrap {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(var(--ink-2), var(--ink-2)) padding-box,
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(34, 48, 65, .35) 23px 24px),
    repeating-linear-gradient(90deg, transparent 0 23px, rgba(34, 48, 65, .35) 23px 24px);
  min-height: 320px;
  overflow: hidden;
}
#dataflow {
  width: 100%;
  height: 100%;
  min-height: 320px;
  display: block;
}

/* telemetry strip */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: clamp(2rem, 5vw, 3rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
}
.stat,
.stat-item {
  flex: 1 1 140px;
  padding: 1.1rem 1.35rem;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.stat:first-child,
.stat-item:first-child { border-left: 0; }
.stat-num,
.stat-number {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--signal);
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  line-height: 1;
}
.stat-label {
  font-family: var(--font-mono);
  color: var(--faint);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* =============================================================
   ABOUT
   ============================================================= */
.about-content {
  max-width: 68ch;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}
.about-content p { color: var(--muted); }
.about-content strong { color: var(--text); font-weight: 500; }

/* About: text + framed portrait */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3.25rem);
  align-items: start;
}
.about-content { max-width: 60ch; }

.about-portrait {
  position: relative;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 3 / 4;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}
.about-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 18%;
  display: block;
  filter: contrast(1.03) saturate(.9);
}
/* vignette blends the studio-grey background into the dark theme */
.about-portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(118% 82% at 50% 34%, transparent 46%, rgba(11, 15, 20, .6) 100%),
    linear-gradient(to top, var(--ink) 1%, rgba(11, 15, 20, 0) 30%);
}
/* amber corner accent — ties the portrait to the schematic system */
.about-portrait::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  width: 22px;
  height: 22px;
  z-index: 2;
  border-left: 2px solid var(--signal);
  border-top: 2px solid var(--signal);
}
.about-portrait figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: .7rem .9rem;
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--muted);
}

@media (min-width: 860px) {
  .about-grid {
    grid-template-columns: minmax(0, 58ch) 300px;
    justify-content: start;
    gap: clamp(2.5rem, 4vw, 4rem);
  }
  .about-portrait { max-width: 300px; justify-self: start; }

  /* Experience: fixed meta column + bullets fill the remaining width */
  .xp { display: grid; grid-template-columns: 240px 1fr; column-gap: 3rem; align-items: start; }
  .xp-head { margin-bottom: 0; }
  .xp-points { max-width: 74ch; }
}

/* =============================================================
   EXPERIENCE — timeline
   ============================================================= */
.experience-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  padding-left: 1.75rem;
}
/* the vertical rail */
.experience-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: .4rem;
  bottom: .4rem;
  width: 1px;
  background: var(--line);
}

.xp {
  position: relative;
  padding-left: 0;
}
.xp-dot {
  position: absolute;
  left: -1.75rem;
  top: .45rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--wire);
  z-index: 1;
  transition: border-color .2s ease, background .2s ease;
}
.xp:hover .xp-dot,
.xp.in .xp-dot {
  border-color: var(--signal);
  background: var(--signal-dim);
}

.xp-head {
  margin-bottom: .85rem;
}
/* company badge on the company line: a real logo on a light chip, or a monogram fallback */
.company-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  min-width: 26px;
  padding: 0 6px;
  flex-shrink: 0;
  border: 1px solid var(--line-bright);
  border-radius: 6px;
  background: var(--ink-3);
  color: var(--signal);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .02em;
  line-height: 1;
  user-select: none;
}
.company-logo.has-logo {
  background: #fff;
  border-color: #fff;
  padding: 3px 7px;
}
.company-logo img {
  height: 18px;
  width: auto;
  max-width: 120px;
  display: block;
}
.xp-period {
  display: inline-block;
  color: var(--signal);
  font-size: .76rem;
  letter-spacing: .04em;
  margin-bottom: .35rem;
}
.xp-title {
  font-size: 1.2rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: .2rem;
}
.xp-company {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: .85rem;
}

.xp-points {
  display: flex;
  flex-direction: column;
  gap: .55rem;
  max-width: 72ch;
}
.xp-points li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--muted);
  font-size: .96rem;
}
.xp-points li::before {
  content: "\25B8";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--wire);
  font-size: .8rem;
}
/* JS-emphasised metrics inside bullets */
.xp-points strong {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--signal);
}

/* =============================================================
   PROJECTS
   ============================================================= */
.work-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-bottom: 2rem;
}
.filter {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .45rem .95rem;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.filter:hover { border-color: var(--line-bright); color: var(--text); }
.filter.is-active {
  color: var(--signal);
  border-color: var(--signal);
  background: var(--signal-dim);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 1.25rem;
}

.proj {
  display: flex;
  flex-direction: column;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s ease, border-color .2s ease;
}
.proj:hover {
  transform: translateY(-4px);
  border-color: var(--signal);
}

/* generated schematic tile (no images) */
.proj-tile {
  position: relative;
  aspect-ratio: 16 / 8;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background:
    repeating-linear-gradient(0deg, transparent 0 15px, rgba(34, 48, 65, .5) 15px 16px),
    repeating-linear-gradient(90deg, transparent 0 15px, rgba(34, 48, 65, .5) 15px 16px),
    var(--ink-3);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
/* JS-injected category cover image (first child of .proj-tile).
   Removes itself on error -> schematic pattern above shows as fallback. */
.proj-img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: .92;
  transition: transform .3s ease, opacity .2s ease;
}
.proj:hover .proj-img {
  transform: scale(1.04);
  opacity: 1;
}
/* bottom-to-top scrim so the .proj-mono tag stays legible over the image */
.proj-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    to top,
    rgba(11, 15, 20, .82) 0%,
    rgba(11, 15, 20, .35) 40%,
    rgba(11, 15, 20, 0) 70%
  );
}
/* deterministic accent bar */
.proj-tile::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  z-index: 3;
  height: 3px;
  width: 100%;
  background: var(--wire);
}
.proj:hover .proj-tile::after { background: var(--signal); }
.proj-mono {
  position: relative;
  z-index: 2;
  align-self: flex-end;
  margin-right: auto;        /* small tag pinned to bottom-left */
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .02em;
  text-align: left;
  word-break: break-word;
  background: rgba(11, 15, 20, .55);
  padding: .25rem .5rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  backdrop-filter: blur(2px);
}

.proj-body {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.15rem 1.25rem 1.35rem;
  flex: 1;
}
.proj-cat {
  color: var(--faint);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.proj-title {
  font-size: 1.1rem;
  color: var(--text);
  font-weight: 600;
}
.proj-desc {
  color: var(--muted);
  font-size: .92rem;
  flex: 1;
}

.proj-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .25rem 0 .5rem;
}

/* shared chip style */
.chip {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--muted);
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: .2rem .55rem;
}

.proj-links { margin-top: auto; }
.proj-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .82rem;
  color: var(--muted);
  transition: color .2s ease;
}
.proj-link i { color: var(--signal); }
.proj-link:hover { color: var(--signal); }

/* =============================================================
   SKILLS
   ============================================================= */
.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
@media (min-width: 720px) {
  /* each category is a full-width row: label on the left, chips filling the right */
  .skillcat { display: grid; grid-template-columns: 200px 1fr; align-items: start; gap: 1.75rem; }
  .skillcat-head { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
}
.skillcat {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.35rem;
  transition: border-color .2s ease;
}
.skillcat:hover { border-color: var(--line-bright); }
.skillcat-head {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line);
}
.skillcat-head i {
  color: var(--signal);
  font-size: 1.05rem;
  width: 1.4rem;
  text-align: center;
}
.skillcat-name {
  font-size: 1.02rem;
  color: var(--text);
  font-weight: 600;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

/* =============================================================
   EDUCATION
   ============================================================= */
.education-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 1.25rem;
}
.edu {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 2px solid var(--wire);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  transition: border-left-color .2s ease;
}
.edu:hover { border-left-color: var(--signal); }
.edu-period {
  display: block;
  color: var(--signal);
  font-size: .76rem;
  letter-spacing: .04em;
  margin-bottom: .5rem;
}
.edu-degree {
  font-size: 1.1rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: .3rem;
}
.edu-school { color: var(--muted); font-size: .9rem; }

/* =============================================================
   CONTACT
   ============================================================= */
.contact-subtitle {
  color: var(--muted);
  max-width: 52ch;
  margin-bottom: 2rem;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}
.contact-lead .contact-social { margin-top: 1.5rem; }
@media (min-width: 860px) {
  .contact-grid { grid-template-columns: 1fr 1fr; gap: clamp(2rem, 4vw, 3.5rem); }
}
.contact-terminal {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
}
.contact-terminal-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--ink-3);
}
.contact-terminal-bar .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--wire);
}
.contact-terminal-label {
  margin-left: .6rem;
  color: var(--faint);
  font-size: .74rem;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  padding: 1.35rem;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: .7rem;
  color: var(--muted);
  font-size: .9rem;
}
.contact-item i { color: var(--signal); width: 1.1rem; text-align: center; }
.contact-item a { color: var(--text); border-bottom: 1px solid transparent; transition: border-color .2s ease; }
.contact-item a:hover { border-color: var(--signal); }
.contact-social {
  display: flex;
  gap: .75rem;
  padding: 1.35rem;
}

/* =============================================================
   FOOTER
   ============================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--ink-2);
  margin-top: 2rem;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-text { color: var(--muted); font-size: .82rem; }
.footer-copyright { color: var(--faint); font-size: .78rem; }
.footer-links { display: flex; gap: 1rem; }
.footer-links a {
  color: var(--muted);
  font-size: .82rem;
  transition: color .2s ease;
}
.footer-links a:hover { color: var(--signal); }

/* =============================================================
   BACK TO TOP
   ============================================================= */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: none;              /* JS toggles to flex */
  align-items: center;
  justify-content: center;
  background: var(--signal);
  color: var(--ink);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .18s ease;
}
.back-to-top.is-visible { display: flex; }
.back-to-top:hover { transform: translateY(-3px); }

/* =============================================================
   SCROLL REVEAL
   ============================================================= */
.section {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s ease, transform .5s ease;
}
.section.in,
.section.visible { opacity: 1; transform: none; }

/* =============================================================
   RESPONSIVE
   ============================================================= */

/* Mobile nav (<= 860px) */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(11, 15, 20, .96);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    padding: .5rem var(--gutter) 1rem;
    transform: translateY(-120%);
    transition: transform .3s ease;
    visibility: hidden;
  }
  .nav-menu.is-open {
    transform: translateY(0);
    visibility: visible;
  }
  .nav-menu li { width: 100%; }
  .nav-link {
    display: block;
    width: 100%;
    padding: .85rem 0;
    border-bottom: 1px solid var(--line);
  }
}

/* Desktop hero two-col + spine (>=1024px) */
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.05fr .95fr;
  }

  /* content aligns with the nav; the spine sits inside the left gutter */

  .spine {
    display: block;
    position: absolute;
    left: calc(var(--gutter) - 1.25rem);
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--line);
  }

  .spine-node {
    display: block;
    position: absolute;
    left: calc(-1.25rem - 5px);
    top: calc(var(--nav-h) + clamp(3.5rem, 8vw, 6rem));
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--ink);
    border: 2px solid var(--wire);
    transition: border-color .25s ease, background .25s ease;
  }
  .section:first-of-type .spine-node {
    top: calc(var(--nav-h) + clamp(2rem, 6vw, 4rem));
  }
  .spine-node.active {
    border-color: var(--signal);
    background: var(--signal);
    box-shadow: 0 0 0 4px var(--signal-dim);
  }
}

/* Stacked telemetry strip on very small screens */
@media (max-width: 520px) {
  .stat,
  .stat-item { flex: 1 1 100%; border-left: 0; border-top: 1px solid var(--line); }
  .stat:first-child,
  .stat-item:first-child { border-top: 0; }
}

/* =============================================================
   REDUCED MOTION
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .section {
    opacity: 1 !important;
    transform: none !important;
  }
  .btn:hover,
  .proj:hover,
  .proj:hover .proj-img,
  .icon-link:hover,
  .social-link:hover,
  .back-to-top:hover { transform: none; }
}