/* =============================================================
   Robert Burdsall — Controls Engineering Portfolio
   Theme: black / electric yellow / white
   Structure:
     1.  Tokens
     2.  Reset & base
     3.  Layout primitives
     4.  Buttons, chips, tags, cards
     5.  Nav
     6.  Hero
     7.  Timeline + year rail (the "bus bar")
     8.  Skills / facts / contact
     9.  Resume page
     10. Projects page
     11. Footer
     12. Reveal animations
     13. Responsive
     14. Print & reduced motion
   ============================================================= */

/* ---------- 1. TOKENS ---------- */
:root {
  /* surfaces */
  --bg:            #060709;
  --bg-2:          #0a0b0f;
  --surface:       #101218;
  --surface-2:     #16191f;
  --border:        rgba(255, 214, 10, 0.12);
  --border-strong: rgba(255, 214, 10, 0.34);

  /* electric yellows */
  --volt:          #ffd60a;   /* primary — live conductor */
  --volt-bright:   #fde047;
  --volt-soft:     #fbbf24;
  --amber:         #f59e0b;
  --amber-deep:    #b45309;

  /* text */
  --text:          #f0f1f4;
  --text-2:        #b7bcc6;
  --muted:         #7f8593;

  /* timeline node colors — loosely follows wire-color convention */
  --c-work:        #ffd60a;   /* live */
  --c-education:   #f59e0b;   /* amber */
  --c-project:     #a3e635;   /* ground */
  --c-award:       #ffffff;   /* neutral */
  --c-future:      #ffffff;

  /* type */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* geometry */
  --radius:    14px;
  --radius-lg: 22px;
  --container: 1180px;
  --nav-h:     72px;

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* shadows */
  --shadow:      0 18px 50px -20px rgba(0, 0, 0, 0.9);
  --shadow-volt: 0 20px 60px -25px rgba(255, 214, 10, 0.5);
}

/* ---------- 2. RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ambient energy field */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 82% -10%, rgba(255, 214, 10, 0.13), transparent 62%),
    radial-gradient(700px 500px at 4% 18%, rgba(245, 158, 11, 0.09), transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 55%, var(--bg) 100%);
}

/* circuit-trace overlay: fine grid + a few "traces" with via dots */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    /* via dots */
    radial-gradient(circle, rgba(255, 214, 10, 0.16) 1.2px, transparent 1.6px),
    /* fine trace grid */
    linear-gradient(rgba(255, 214, 10, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 214, 10, 0.045) 1px, transparent 1px);
  background-size: 128px 128px, 64px 64px, 64px 64px;
  mask-image: radial-gradient(ellipse 92% 62% at 50% 0%, #000 18%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 92% 62% at 50% 0%, #000 18%, transparent 76%);
}

img { max-width: 100%; display: block; }
a   { color: var(--volt); text-decoration: none; transition: color 0.2s var(--ease); }
a:hover { color: var(--volt-bright); }

h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.025em; font-weight: 700; }
p { margin: 0 0 1rem; }
/* `ol` must be reset alongside `ul` — the year rail is an ordered list, and
   without this its <li>s keep display:list-item and render decimal markers. */
ul, ol { margin: 0; padding: 0; list-style: none; }

svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

::selection { background: rgba(255, 214, 10, 0.32); color: #fff; }

:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: 6px;
}

::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--volt), var(--amber-deep));
  border-radius: 99px;
  border: 3px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--volt); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--volt); color: #000; font-weight: 600;
  padding: 12px 20px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

/* scroll progress — reads as a charging bus */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 200;
  background: transparent; pointer-events: none;
}
.scroll-progress span {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--amber-deep), var(--volt), #fff);
  box-shadow: 0 0 14px rgba(255, 214, 10, 0.85);
  transition: width 0.08s linear;
}

/* ---------- 3. LAYOUT PRIMITIVES ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section-head { max-width: 760px; margin-bottom: 56px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--volt); margin-bottom: 14px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--volt));
}

.section-title { font-size: clamp(2rem, 4.4vw, 3.1rem); font-weight: 800; margin-bottom: 16px; }
.section-sub   { color: var(--text-2); font-size: 1.05rem; max-width: 62ch; }

/* The sweep runs `alternate`, not `infinite` on its own: a one-way sweep has to
   snap back to the start position each cycle, which reads as a hard flicker
   every few seconds. Alternating reverses direction instead, and ease-in-out
   decelerates into each turn — so it sweeps back and forth indefinitely with no
   seam, however long someone watches it. */
.grad {
  background: linear-gradient(100deg, var(--amber) 0%, var(--volt) 35%, #fff 70%, var(--volt-soft) 100%);
  background-size: 250% auto;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  animation: gradShift 11s ease-in-out infinite alternate;
}
@keyframes gradShift {
  from { background-position: 0% center; }
  to   { background-position: 250% center; }
}

.muted { color: var(--muted); }
.sep   { color: var(--muted); margin-inline: 8px; }

/* Oscilloscope-style divider — a scrolling trace.
   The path is drawn 16 periods wide inside a viewBox only 8 periods wide, and
   shifts by exactly ONE period (60 user units) per cycle. Because the waveform
   is exactly periodic, the frame after the shift is pixel-identical to the
   frame before it, so the restart is invisible and it scrolls forever with no
   seam. Never animate this by a non-integer number of periods. */
.wave {
  display: block; width: 100%; height: 46px;
  color: rgba(255, 214, 10, 0.30);
  overflow: hidden;
}
.wave svg { width: 100%; height: 100%; display: block; }
.wave path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  animation: waveScroll 4s linear infinite;
}
@keyframes waveScroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-60px); }
}

/* ---------- 4. BUTTONS / CHIPS / TAGS / CARDS ---------- */
.btn {
  --btn-bg: transparent;
  position: relative;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.94rem; font-weight: 600; letter-spacing: 0.01em;
  border: 1px solid var(--border-strong);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
              border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn:hover { transform: translateY(-2px); }

.btn--primary {
  --btn-bg: linear-gradient(120deg, var(--amber) 0%, var(--volt) 55%, var(--volt-bright) 130%);
  border-color: transparent;
  color: #14100a;
  box-shadow: var(--shadow-volt);
}
.btn--primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,0.55) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform 0.75s var(--ease);
}
.btn--primary:hover::after { transform: translateX(120%); }
.btn--primary:hover { box-shadow: 0 24px 70px -22px rgba(255, 214, 10, 0.85); color: #14100a; }

.btn--ghost { background: rgba(255, 214, 10, 0.04); }
.btn--ghost:hover {
  border-color: var(--volt);
  background: rgba(255, 214, 10, 0.12);
  color: #fff;
}
.btn--sm { padding: 10px 18px; font-size: 0.86rem; }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.02em;
  padding: 5px 11px; border-radius: 7px;
  color: var(--text-2);
  background: rgba(255, 214, 10, 0.05);
  border: 1px solid var(--border);
  transition: all 0.25s var(--ease);
}
.chips li:hover {
  color: #fff;
  border-color: var(--volt);
  background: rgba(255, 214, 10, 0.15);
  transform: translateY(-2px);
}
.chips--lg li { font-size: 0.8rem; padding: 7px 13px; }

/* tags */
.tag {
  font-family: var(--mono); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.11em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 6px; white-space: nowrap;
  border: 1px solid currentColor;
}
.tag--work      { color: var(--c-work);      background: rgba(255, 214, 10, 0.10); }
.tag--education { color: var(--c-education); background: rgba(245, 158, 11, 0.10); }
.tag--project   { color: var(--c-project);   background: rgba(163, 230, 53, 0.10); }
.tag--award     { color: var(--c-award);     background: rgba(255, 255, 255, 0.08); }
.tag--future    { color: #fff;               background: rgba(255, 255, 255, 0.08); }

/* cards */
.card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--surface) 0%, rgba(10, 11, 15, 0.7) 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
  overflow: hidden;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow), 0 0 0 1px rgba(255, 214, 10, 0.16);
}
.card h3 { font-size: 1.14rem; margin-bottom: 16px; }

/* cursor spotlight — driven by --mx/--my set in main.js */
.card--spot::before,
[data-spotlight]::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%),
              rgba(255, 214, 10, 0.12), transparent 42%);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.card--spot:hover::before,
[data-spotlight]:hover::before { opacity: 1; }

.card__icon {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 11px; margin-bottom: 18px;
  color: var(--volt);
  background: rgba(255, 214, 10, 0.10);
  border: 1px solid rgba(255, 214, 10, 0.24);
}
.card__icon svg { width: 21px; height: 21px; }

/* ---------- 5. NAV ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 150;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: height 0.35s var(--ease), background 0.35s var(--ease),
              border-color 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  height: 62px;
  background: rgba(6, 7, 9, 0.84);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom-color: var(--border);
}
.nav__inner {
  width: 100%; max-width: var(--container); margin-inline: auto;
  padding-inline: 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav__brand { display: flex; align-items: center; gap: 12px; color: var(--text); font-weight: 700; }
.nav__brand:hover { color: #fff; }
.nav__mark {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  color: #14100a;
  background: linear-gradient(135deg, var(--amber), var(--volt));
  box-shadow: 0 6px 20px -8px rgba(255, 214, 10, 0.95);
  transition: transform 0.4s var(--ease);
}
.nav__mark svg { width: 19px; height: 19px; fill: currentColor; stroke: none; }
.nav__brand:hover .nav__mark { transform: rotate(-8deg) scale(1.06); }
.nav__name { font-size: 0.98rem; letter-spacing: -0.01em; }

.nav__links { display: flex; align-items: center; gap: 6px; }
.nav__links a {
  position: relative;
  padding: 9px 15px; border-radius: 9px;
  font-size: 0.92rem; font-weight: 500; color: var(--text-2);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.nav__links a:hover { color: #fff; background: rgba(255, 214, 10, 0.07); }
.nav__links a::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 4px; height: 1.5px;
  background: linear-gradient(90deg, var(--amber), var(--volt));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__links a.is-active { color: #fff; }

.nav__cta {
  margin-left: 8px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 214, 10, 0.10);
  color: #fff !important;
}
.nav__cta::after { display: none; }
.nav__cta:hover { border-color: var(--volt); background: rgba(255, 214, 10, 0.22) !important; }

.nav__toggle {
  display: none;
  width: 42px; height: 42px; border-radius: 10px;
  background: rgba(255, 214, 10, 0.06); border: 1px solid var(--border);
  cursor: pointer; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav__toggle span {
  display: block; width: 18px; height: 1.8px; border-radius: 2px; background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* ---------- 6. HERO ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: calc(var(--nav-h) + 60px) 0 110px;
  overflow: hidden;
}
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.62; }
.hero__glow {
  position: absolute; top: -10%; right: -5%;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 214, 10, 0.18), transparent 66%);
  filter: blur(40px);
  animation: float 14s ease-in-out infinite;
  pointer-events: none;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(-40px, 40px) scale(1.08); }
}

.hero__inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 64px; align-items: center;
}
.hero__inner > * { min-width: 0; }

.portrait {
  position: relative;
  width: 100%; max-width: 360px; aspect-ratio: 1;
  border-radius: 28px;
  padding: 6px;
  background: linear-gradient(140deg, rgba(255,214,10,0.75), rgba(245,158,11,0.2) 45%, rgba(255,255,255,0.35));
}
.portrait img {
  width: 100%; height: 100%; object-fit: cover;
  border-radius: 23px;
  background: var(--surface);
  filter: grayscale(0.25) contrast(1.05);
  transition: filter 0.6s var(--ease), transform 0.6s var(--ease);
}
.portrait:hover img { filter: grayscale(0) contrast(1.06); transform: scale(1.015); }
.portrait__ring {
  position: absolute; inset: -18px;
  border-radius: 40px;
  border: 1px solid rgba(255, 214, 10, 0.22);
  animation: pulseRing 4.5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes pulseRing {
  0%, 100% { transform: scale(1);    opacity: 0.6; }
  50%      { transform: scale(1.03); opacity: 0.2; }
}

.portrait__badge {
  display: inline-flex; align-items: center; gap: 9px;
  margin-top: 22px; padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.83rem; font-weight: 500; color: var(--text);
  background: rgba(16, 18, 24, 0.88);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(8px);
}
.portrait__badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--volt); flex: none;
  animation: ping 2.2s ease-out infinite;
}
@keyframes ping {
  0%   { box-shadow: 0 0 0 0 rgba(255, 214, 10, 0.7); }
  70%  { box-shadow: 0 0 0 9px rgba(255, 214, 10, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 214, 10, 0); }
}

.hero__eyebrow {
  font-family: var(--mono); font-size: 0.85rem; color: var(--volt);
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 10px;
}
.hero__title {
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 800; letter-spacing: -0.04em; line-height: 1.02;
  margin-bottom: 14px;
}
.hero__role {
  font-size: clamp(1.05rem, 2.2vw, 1.5rem);
  font-weight: 500; color: var(--text-2); margin-bottom: 22px;
  display: flex; flex-wrap: wrap; gap: 10px; align-items: baseline;
}
.hero__role-rotate { color: #fff; display: inline-flex; align-items: baseline; }
.hero__role-word { font-weight: 600; }
.caret {
  display: inline-block; width: 2px; height: 1.05em; margin-left: 3px;
  background: var(--volt); transform: translateY(2px);
  box-shadow: 0 0 8px var(--volt);
  animation: blink 1.05s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__bio { color: var(--text-2); font-size: 1.06rem; max-width: 60ch; margin-bottom: 30px; }
.hero__bio strong { color: #fff; font-weight: 600; }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }

.hero__socials { display: flex; flex-wrap: wrap; gap: 10px; }
.hero__socials a {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 15px; border-radius: 10px;
  font-size: 0.87rem; color: var(--text-2);
  border: 1px solid var(--border);
  background: rgba(255, 214, 10, 0.03);
  transition: all 0.3s var(--ease);
}
.hero__socials a svg { width: 16px; height: 16px; }
.hero__socials a:hover {
  color: #fff; border-color: var(--volt);
  background: rgba(255, 214, 10, 0.12);
  transform: translateY(-2px);
}

.hero__scroll {
  position: relative; z-index: 2;
  margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--muted); font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.16em; text-transform: uppercase;
}
.hero__scroll:hover { color: var(--volt); }
.hero__scroll-line {
  width: 1px; height: 52px; overflow: hidden;
  background: rgba(255, 214, 10, 0.16); position: relative;
}
.hero__scroll-line::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent, var(--volt));
  animation: scrollCue 2.1s var(--ease) infinite;
}
@keyframes scrollCue {
  0%   { transform: translateY(-100%); }
  60%  { transform: translateY(100%); }
  100% { transform: translateY(100%); }
}

/* ---------- 7. TIMELINE ---------- */
.timeline { position: relative; padding: 120px 0 130px; }

.timeline__layout {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 48px;
  align-items: start;
}
/* Grid/flex items default to min-width:auto, which lets a wide child (the
   horizontally-scrolling year list on mobile) push the track past the
   container. min-width:0 lets them shrink so the scroller can do its job. */
.timeline__layout > * { min-width: 0; }

/* --- sticky year rail: reads as an energized bus bar --- */
.rail { position: sticky; top: 0; height: 100svh; display: flex; align-items: center; }
/* Capped to the viewport and column-flexed so a long timeline (this one spans
   11 distinct years) can't push the last year off-screen on a short laptop
   window. The year list scrolls internally if it ever runs out of room. */
.rail__inner {
  width: 100%; min-width: 0;
  max-height: calc(100svh - 24px);
  display: flex; flex-direction: column;
}

.rail__now { margin-bottom: 26px; flex: none; }
.rail__now-label {
  display: block; font-family: var(--mono); font-size: 0.66rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-bottom: 2px;
}
.rail__now-year {
  display: block;
  font-size: 3.4rem; font-weight: 800; line-height: 1; letter-spacing: -0.04em;
  background: linear-gradient(140deg, #fff, var(--volt) 55%, var(--amber));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  transition: opacity 0.3s var(--ease), transform 0.35s var(--ease);
  /* background-clip:text paints only inside the element box, and the negative
     letter-spacing applies after the final character too — pulling the box in
     past the last glyph's ink and shaving the right edge of the last digit
     (e.g. the "5" in 2025). The padding restores that slack; the matching
     negative margin keeps the glyphs in the same visual position. */
  padding-right: 0.16em;
  margin-right: -0.16em;
}
.rail__now-year.is-swapping { opacity: 0; transform: translateY(-10px); }

.rail__track { position: relative; display: flex; gap: 20px; min-width: 0; min-height: 0; flex: 0 1 auto; }
.rail__line {
  position: relative; width: 2px; border-radius: 2px; flex: none;
  background: rgba(255, 214, 10, 0.14);
  overflow: hidden;
}
.rail__fill {
  position: absolute; left: 0; top: 0; width: 100%; height: 0%;
  background: linear-gradient(180deg, var(--amber-deep), var(--volt), #fff);
  box-shadow: 0 0 16px rgba(255, 214, 10, 0.85);
  transition: height 0.15s linear;
}

.rail__years {
  display: flex; flex-direction: column; gap: 16px;
  min-width: 0; min-height: 0;
  overflow-y: auto;
  scrollbar-width: none;
  /* `overflow-y: auto` forces overflow-x to compute to `auto` too — CSS has no
     way to scroll one axis while leaving the other truly visible. That turns
     this into a clipping box, and the active row paints outside its text box:
     it shifts 4px right, its label gets bolder, and its dot carries a glow
     ring. Without room, the last digit of the active year gets cut off.
     The padding creates that room inside the scroll box; the matching negative
     margin cancels it for layout so the list doesn't visually move. */
  padding: 8px 18px;
  margin: -8px -18px;
}
.rail__years::-webkit-scrollbar { display: none; }
.rail__year {
  display: flex; align-items: center; gap: 11px;
  font-family: var(--mono); font-size: 0.9rem; font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.3s var(--ease), transform 0.35s var(--ease);
  background: none; border: 0; padding: 0; text-align: left;
}
.rail__year::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; flex: none;
  background: rgba(255, 214, 10, 0.25);
  transition: all 0.35s var(--ease);
}
.rail__year:hover { color: var(--text-2); }
.rail__year.is-active {
  color: #fff; font-weight: 600;
  transform: translateX(4px);
}
.rail__year.is-active::before {
  background: var(--volt);
  box-shadow: 0 0 0 4px rgba(255, 214, 10, 0.16), 0 0 14px rgba(255, 214, 10, 0.95);
  transform: scale(1.25);
}
.rail__year.is-past { color: var(--text-2); }
.rail__year.is-past::before { background: rgba(255, 214, 10, 0.55); }

/* --- entries --- */
.timeline__entries { position: relative; padding-left: 34px; }
.timeline__entries::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg,
    transparent, rgba(255, 214, 10, 0.22) 8%, rgba(255, 214, 10, 0.22) 92%, transparent);
}

.tl-item { position: relative; padding-bottom: 68px; }
.tl-item:last-child { padding-bottom: 0; }

/* node styled like a PCB via */
.tl-item__node {
  position: absolute; left: -34px; top: 26px;
  width: 15px; height: 15px; margin-left: -7px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  z-index: 2;
  transition: all 0.5s var(--ease);
}
.tl-item__node span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--muted);
  transition: all 0.5s var(--ease);
}
.tl-item.is-inview .tl-item__node { border-color: transparent; transform: scale(1.15); }
.tl-item.is-inview .tl-item__node span { transform: scale(1.2); }

.tl-item[data-type="work"].is-inview      .tl-item__node span { background: var(--c-work);      box-shadow: 0 0 0 4px rgba(255,214,10,0.16), 0 0 16px var(--c-work); }
.tl-item[data-type="education"].is-inview .tl-item__node span { background: var(--c-education); box-shadow: 0 0 0 4px rgba(245,158,11,0.16), 0 0 16px var(--c-education); }
.tl-item[data-type="project"].is-inview   .tl-item__node span { background: var(--c-project);   box-shadow: 0 0 0 4px rgba(163,230,53,0.16), 0 0 16px var(--c-project); }
.tl-item[data-type="award"].is-inview     .tl-item__node span { background: #fff;               box-shadow: 0 0 0 4px rgba(255,255,255,0.14), 0 0 16px #fff; }
.tl-item[data-type="future"].is-inview    .tl-item__node span { background: #fff;               box-shadow: 0 0 0 4px rgba(255,255,255,0.14), 0 0 16px #fff; }

.tl-item__body {
  position: relative;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(16, 18, 24, 0.92) 0%, rgba(10, 11, 15, 0.55) 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.45s var(--ease), border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.tl-item__body::after {
  content: ""; position: absolute; left: 0; top: 24px; bottom: 24px; width: 2px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, transparent, var(--volt), transparent);
  opacity: 0; transition: opacity 0.45s var(--ease);
}
.tl-item:hover .tl-item__body {
  transform: translateX(6px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow), 0 0 0 1px rgba(255, 214, 10, 0.16);
}
.tl-item:hover .tl-item__body::after { opacity: 1; }

.tl-item__head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 12px; }
.tl-item__date {
  font-family: var(--mono); font-size: 0.78rem; color: var(--volt); letter-spacing: 0.02em;
}
.tl-item__title { font-size: 1.42rem; font-weight: 700; margin-bottom: 5px; }
.tl-item__org   { color: var(--text-2); font-size: 0.95rem; font-weight: 500; margin-bottom: 14px; }
.tl-item__desc  { color: var(--text-2); font-size: 0.98rem; margin-bottom: 14px; }

.tl-item__points { margin-bottom: 18px; display: grid; gap: 8px; }
.tl-item__points li {
  position: relative; padding-left: 22px;
  color: var(--text-2); font-size: 0.94rem;
}
.tl-item__points li::before {
  content: ""; position: absolute; left: 2px; top: 0.68em;
  width: 6px; height: 6px; border-radius: 2px;
  background: var(--volt);
  transform: rotate(45deg);
}

.tl-item--future .tl-item__body {
  background: linear-gradient(160deg, rgba(255, 214, 10, 0.10), rgba(10, 11, 15, 0.6));
  border-color: rgba(255, 214, 10, 0.34);
  border-style: dashed;
}

/* ---------- 8. SKILLS / FACTS / CONTACT ---------- */
.skills { padding: 100px 0; }
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 22px;
}

.facts { padding: 40px 0 100px; }
.facts__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(16, 18, 24, 0.92), rgba(10, 11, 15, 0.4));
  border: 1px solid var(--border);
}
.fact { text-align: center; }
.fact__num {
  display: block;
  font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 800; letter-spacing: -0.03em;
  background: linear-gradient(140deg, #fff, var(--volt) 60%, var(--amber));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  font-variant-numeric: tabular-nums;
}
.fact__label {
  display: block; font-size: 0.84rem; color: var(--muted);
  letter-spacing: 0.04em; margin-top: 4px;
}

.contact { padding: 40px 0 120px; }
.contact__panel {
  position: relative; overflow: hidden;
  text-align: center;
  padding: clamp(40px, 7vw, 76px) clamp(24px, 5vw, 60px);
  border-radius: 28px;
  background: linear-gradient(150deg, rgba(16, 18, 24, 0.96), rgba(6, 7, 9, 0.9));
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
}
.contact__glow {
  position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 214, 10, 0.16), transparent 62%);
  filter: blur(30px); pointer-events: none;
}
.contact__panel > * { position: relative; z-index: 1; }
.contact__panel .section-sub { margin-inline: auto; margin-bottom: 30px; }
.contact__actions {
  display: flex; flex-wrap: wrap; gap: 13px; justify-content: center; margin-bottom: 26px;
}
.contact__meta {
  display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
  font-size: 0.88rem; color: var(--text-2); margin: 0;
}

/* ---------- 9. RESUME PAGE ---------- */
.page-head {
  padding: calc(var(--nav-h) + 90px) 0 60px;
  position: relative;
}
.page-head__inner { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 28px; }
.page-head .section-sub { margin-bottom: 0; }
.page-head__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.resume { padding-bottom: 110px; }
.resume__grid {
  display: grid; grid-template-columns: 300px 1fr; gap: 34px; align-items: start;
}
.resume__grid > * { min-width: 0; }
.resume__aside { position: sticky; top: calc(var(--nav-h) + 24px); display: grid; gap: 20px; }

.rblock { margin-bottom: 52px; }
.rblock__title {
  display: flex; align-items: center; gap: 14px;
  font-size: 1.25rem; font-weight: 700; margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.rblock__title::before {
  content: ""; width: 4px; height: 20px; border-radius: 3px; flex: none;
  background: linear-gradient(180deg, var(--volt), var(--amber));
}

.rentry { position: relative; padding: 22px 24px; border-radius: var(--radius); margin-bottom: 16px;
  background: rgba(16, 18, 24, 0.6); border: 1px solid var(--border);
  transition: all 0.35s var(--ease); }
.rentry:hover { border-color: var(--border-strong); transform: translateX(4px); background: rgba(16, 18, 24, 0.95); }
.rentry__top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; align-items: baseline; margin-bottom: 4px; }
.rentry__role { font-size: 1.08rem; font-weight: 650; }
.rentry__when { font-family: var(--mono); font-size: 0.78rem; color: var(--volt); white-space: nowrap; }
.rentry__org  { color: var(--text-2); font-size: 0.93rem; margin-bottom: 12px; }
.rentry ul { display: grid; gap: 7px; margin-bottom: 14px; }
.rentry ul li { position: relative; padding-left: 20px; font-size: 0.93rem; color: var(--text-2); }
.rentry ul li::before {
  content: ""; position: absolute; left: 2px; top: 0.66em;
  width: 5px; height: 5px; border-radius: 2px; background: var(--volt); transform: rotate(45deg);
}

.skillbar { margin-bottom: 16px; }
.skillbar__top { display: flex; justify-content: space-between; font-size: 0.88rem; margin-bottom: 7px; }
.skillbar__top b { font-weight: 600; }
.skillbar__top span { font-family: var(--mono); font-size: 0.76rem; color: var(--muted); }
.skillbar__track { height: 5px; border-radius: 4px; background: rgba(255, 214, 10, 0.1); overflow: hidden; }
.skillbar__fill {
  display: block; height: 100%; width: 0;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--amber), var(--volt));
  box-shadow: 0 0 12px rgba(255, 214, 10, 0.6);
  transition: width 1.1s var(--ease-out);
}

.coursework { display: flex; flex-wrap: wrap; gap: 9px; }

.pdf-frame {
  width: 100%; height: 900px; border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--surface);
}

/* ---------- 10. PROJECTS PAGE ---------- */
.projects { padding-bottom: 110px; }

.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 38px; }
.filter {
  padding: 9px 17px; border-radius: 999px;
  font-size: 0.87rem; font-weight: 500; color: var(--text-2);
  background: rgba(255, 214, 10, 0.04);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.filter:hover { color: #fff; border-color: var(--border-strong); }
.filter.is-active {
  color: #14100a; border-color: transparent; font-weight: 600;
  background: linear-gradient(120deg, var(--amber), var(--volt));
  box-shadow: 0 10px 30px -12px rgba(255, 214, 10, 0.85);
}

.proj-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px;
}
.proj {
  display: flex; flex-direction: column;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.proj.is-hidden { display: none; }
.proj__thumb {
  position: relative; aspect-ratio: 16 / 9; overflow: hidden;
  border-radius: var(--radius); margin-bottom: 20px;
  background: linear-gradient(135deg, #17161016, #0a0b0f), var(--surface);
  border: 1px solid var(--border);
  display: grid; place-items: center;
}
.proj__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.proj:hover .proj__thumb img { transform: scale(1.05); }
.proj__thumb-placeholder {
  font-family: var(--mono); font-size: 0.76rem; color: var(--muted); letter-spacing: 0.1em;
}
.proj__featured {
  position: absolute; top: 12px; left: 12px;
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 10px; border-radius: 6px; color: #14100a; font-weight: 600;
  background: linear-gradient(120deg, var(--amber), var(--volt));
}
.proj__title { font-size: 1.2rem; margin-bottom: 8px; }
.proj__desc { color: var(--text-2); font-size: 0.94rem; margin-bottom: 14px; flex: 1; }
.proj__metrics {
  display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 16px;
  padding: 12px 0; border-block: 1px solid var(--border);
}
.proj__metric { display: flex; flex-direction: column; }
.proj__metric b { font-size: 1.05rem; color: #fff; font-weight: 700; }
.proj__metric span { font-size: 0.74rem; color: var(--muted); letter-spacing: 0.04em; }
.proj__links { display: flex; gap: 10px; margin-top: 16px; }
.proj__link {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.85rem; font-weight: 500; color: var(--text-2);
  padding: 8px 14px; border-radius: 9px;
  border: 1px solid var(--border); background: rgba(255, 214, 10, 0.03);
  transition: all 0.3s var(--ease);
}
.proj__link svg { width: 15px; height: 15px; }
.proj__link:hover { color: #fff; border-color: var(--volt); background: rgba(255, 214, 10, 0.12); }

.empty-state {
  padding: 60px 20px; text-align: center; color: var(--muted);
  border: 1px dashed var(--border); border-radius: var(--radius-lg);
}

/* ---------- 11. FOOTER ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 34px 0;
  background: rgba(6, 7, 9, 0.6);
}
.footer__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px;
}
.footer p { margin: 0; font-size: 0.86rem; color: var(--muted); }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__links a { font-size: 0.86rem; color: var(--text-2); }
.footer__links a:hover { color: var(--volt); }

/* ---------- 12. REVEAL ANIMATIONS ----------
   Scoped to .js (set by an inline script in <head>) so that if JavaScript
   fails to load or errors out, content stays visible instead of the page
   rendering blank. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
  transition-delay: var(--delay, 0ms);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 13. RESPONSIVE ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 44px; }
  .hero__portrait { display: flex; flex-direction: column; align-items: flex-start; }
  .portrait { max-width: 260px; }
  .resume__grid { grid-template-columns: 1fr; }
  .resume__aside { position: static; }
}

@media (max-width: 900px) {
  .timeline__layout { grid-template-columns: 1fr; gap: 0; }

  /* rail becomes a compact sticky bar at the top on mobile */
  .rail {
    position: sticky; top: var(--nav-h); height: auto; z-index: 90;
    margin-bottom: 26px; padding: 12px 0;
    background: rgba(6, 7, 9, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }
  .rail__now { display: flex; align-items: baseline; gap: 12px; margin-bottom: 12px; }
  /* flex:none so the year is never shrunk below its own text width here */
  .rail__now-year { font-size: 2rem; flex: none; }
  .rail__track { flex-direction: column; gap: 10px; }
  .rail__line { width: 100%; height: 2px; }
  .rail__fill { width: 0; height: 100%; transition: width 0.15s linear; }
  .rail__years {
    flex-direction: row; gap: 16px;
    overflow-x: auto;
    scrollbar-width: none;
    /* Same room-for-artwork trick as desktop, sized for the horizontal strip. */
    padding: 6px 16px;
    margin: -6px -16px;
  }
  .rail__years::-webkit-scrollbar { display: none; }
  .rail__year { white-space: nowrap; font-size: 0.82rem; }
  .rail__year.is-active { transform: none; }
}

@media (max-width: 780px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed; inset: 0 0 auto; top: var(--nav-h);
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 18px 24px 26px;
    background: rgba(6, 7, 9, 0.98);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-14px);
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }
  .nav__links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav__links a { padding: 13px 14px; font-size: 1rem; }
  .nav__links a::after { display: none; }
  .nav__cta { margin-left: 0; margin-top: 8px; text-align: center; }
  .nav__name { display: none; }

  .timeline__entries { padding-left: 26px; }
  .tl-item__node { left: -26px; top: 24px; }
  .tl-item__body { padding: 24px 22px; }
  .tl-item { padding-bottom: 48px; }

  .page-head__inner { flex-direction: column; align-items: flex-start; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .pdf-frame { height: 620px; }
}

@media (max-width: 520px) {
  .hero__actions .btn { width: 100%; justify-content: center; }
  .contact__actions .btn { width: 100%; justify-content: center; }
  .proj-grid { grid-template-columns: 1fr; }
}

/* ---------- 14. PRINT & REDUCED MOTION ---------- */
@media print {
  body::before, body::after,
  .nav, .footer, .hero__canvas, .hero__glow, .hero__scroll,
  .rail, .scroll-progress, .filters, .wave { display: none !important; }
  body { background: #fff; color: #000; }
  .tl-item__body, .card, .rentry { border: 1px solid #ccc; background: #fff; box-shadow: none; }
  .grad, .fact__num, .rail__now-year { -webkit-text-fill-color: #000; color: #000; }
  a { color: #000; text-decoration: underline; }
  .timeline__layout, .resume__grid { grid-template-columns: 1fr; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
}

@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;
  }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hero__canvas { display: none; }
  .wave path { stroke-dashoffset: 0; }
}