/* ============================================================
   Steven Tsvik — portfolio
   warm earthy, two themes: espresso/amber dark · cream/clay light
   ============================================================ */

:root {
  --font-display: "Syne", sans-serif;
  --font-body: "Instrument Sans", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --frame-x: clamp(1.25rem, 4vw, 3.5rem);
  --content-x: clamp(1.5rem, 12vw, 16rem);

  /* warm dark (default when JS is off) */
  --bg: #1a1410;
  --bg-raise: #251c15;
  --ink: #f3ece1;
  --ink-dim: #a5968a;
  --ink-faint: #6b5d51;
  --accent: #e8a34c;
  --dot: #d97f54;
  --accent-soft: color-mix(in srgb, var(--accent) 14%, transparent);
  --rule: rgba(243, 236, 225, 0.09);
  --pill: rgba(243, 236, 225, 0.07);
  --glow-hi: rgba(232, 163, 76, 0.45);
  --glow-lo: rgba(232, 163, 76, 0.22);
  --card-bg: #251c15;
  --card-ink: #f3ece1;
  --card-dim: #a5968a;
  --card-faint: #6b5d51;
  --card-rule: rgba(243, 236, 225, 0.09);
  --grain-o: 0.5;
  --tile-1: #1f1813; --tile-1-h: #2a2018;
  --tile-2: #271d14; --tile-2-h: #342718;
  --tile-3: #302115; --tile-3-h: #3f2c1a;
  --tile-4: #3a2a16; --tile-4-h: #4c3719;
}

:root[data-theme="light"] {
  --bg: #f2ecdf;
  --bg-raise: #e9dfc9;
  --ink: #43362e;
  --ink-dim: #8a7a6b;
  --ink-faint: #bdaf9c;
  --accent: #b17f24;
  --dot: #c96f43;
  --accent-soft: color-mix(in srgb, var(--accent) 16%, transparent);
  --rule: rgba(67, 54, 46, 0.13);
  --pill: rgba(67, 54, 46, 0.07);
  --glow-hi: rgba(177, 127, 36, 0.16);
  --glow-lo: rgba(177, 127, 36, 0.08);
  --card-bg: #453b34;
  --card-ink: #f3ece1;
  --card-dim: #cbbdae;
  --card-faint: #8f8175;
  --card-rule: rgba(243, 236, 225, 0.14);
  --grain-o: 0.3;
  --tile-1: #e9dfc9; --tile-1-h: #efe6d2;
  --tile-2: #e3d3ad; --tile-2-h: #ecdcb8;
  --tile-3: #dcc178; --tile-3-h: #e6cd88;
  --tile-4: #4b3e35; --tile-4-h: #5a4b40;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  transition: background 0.45s ease, color 0.45s ease;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--bg); }

/* ---------- ambient layers ---------- */

.grain {
  position: fixed; inset: 0; z-index: 40; pointer-events: none;
  opacity: var(--grain-o); mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
}

/* fade content out as it passes under the fixed header */
body::before {
  content: ""; position: fixed; top: 0; left: 0; right: 0; height: 8rem;
  z-index: 20; pointer-events: none;
  background: linear-gradient(180deg, var(--bg) 20%, transparent);
}

/* ---------- custom cursor follower ---------- */

/* the circle replaces the native cursor entirely (only where it can run) */
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  *, *::before, *::after { cursor: none !important; }
}

.cursor {
  position: fixed; top: 0; left: 0; z-index: 60;
  width: 10px; height: 10px; border-radius: 50%;
  /* neutral ink dot (like the reference) — difference-blend inversions stay warm-neutral */
  background: var(--ink);
  pointer-events: none; opacity: 0;
  transform: translate(-50%, -50%);
  /* invert whatever is underneath so text stays readable through the dot */
  mix-blend-mode: difference;
  transition: width 0.25s ease, height 0.25s ease, opacity 0.35s ease,
              background 0.25s ease, border-color 0.25s ease;
}
.cursor.is-on { opacity: 1; }
.cursor.is-hover {
  width: 42px; height: 42px;
  background: var(--ink);
}
@media (hover: none), (prefers-reduced-motion: reduce) {
  .cursor { display: none; }
}

/* ---------- fixed frame ---------- */

.frame { position: fixed; z-index: 30; }

.frame--identity {
  top: 2rem; left: var(--frame-x); line-height: 1.25;
  display: block; text-decoration: none; color: inherit;
}
.hand {
  display: block;
  font-family: "Caveat", cursive; font-weight: 500;
  font-size: 1.25rem; letter-spacing: 0.01em;
  color: var(--ink-dim);
  transform: rotate(-3deg); transform-origin: left bottom;
  margin-bottom: -0.15rem;
}

/* name <-> role flip on hover (like the reference's logo swap) */
.identity-swap, .status-swap { display: grid; }
.identity-swap > *, .status-swap > * { grid-area: 1 / 1; }

.identity-name {
  display: block;
  font-family: var(--font-display); font-weight: 800; font-size: 1.35rem;
  letter-spacing: -0.01em;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.identity-name .dim { color: var(--ink-dim); }
.identity-name--alt { opacity: 0; transform: translateY(8px); color: var(--accent); }
.identity-name--alt .dim { color: var(--accent); opacity: 0.55; }

.status {
  font-family: var(--font-mono); font-size: 0.68rem; color: var(--ink-dim);
  margin-top: 0.3rem; display: flex; align-items: center; gap: 0.45rem;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.status--alt { opacity: 0; transform: translateY(8px); color: var(--accent); }

@media (hover: hover) {
  .frame--identity:hover .identity-name:not(.identity-name--alt),
  .frame--identity:hover .status:not(.status--alt) { opacity: 0; transform: translateY(-8px); }
  .frame--identity:hover .identity-name--alt,
  .frame--identity:hover .status--alt { opacity: 1; transform: translateY(0); }
}

.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--dot);
  box-shadow: 0 0 8px var(--dot);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }

.frame--nav {
  top: 2rem; right: var(--frame-x);
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.35rem;
}
.frame--nav a {
  color: var(--ink-dim); text-decoration: none;
  font-family: var(--font-mono); font-size: 0.75rem;
  letter-spacing: 0.22em; text-transform: uppercase;
  transition: color 0.25s;
}

/* clip-path text wipe (reference: .nav-link-text--hover) */
.nav-inner { position: relative; display: inline-block; }
.nav-t { display: inline-block; transition: opacity 0.3s; }
.nav-t--hover {
  position: absolute; inset: 0; color: var(--accent);
  text-shadow: 0 0 14px var(--accent-soft);
  clip-path: inset(100% 0 0 0);
  transition: clip-path 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.frame--nav a:hover .nav-t--hover { clip-path: inset(0 0 0 0); }

/* scrollspy: current section stays lit */
.frame--nav a.is-active { color: var(--ink); }
.frame--nav a.is-active .nav-inner::after {
  content: ""; position: absolute; left: -1rem; top: 50%;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
  transform: translateY(-50%);
}

.frame--rail {
  right: calc(var(--frame-x) - 0.6rem); bottom: 3rem;
  display: flex; flex-direction: column; gap: 0.35rem;
}
.frame--rail a {
  color: var(--ink-faint); padding: 0.6rem; border-radius: 50%;
  transition: color 0.25s, background 0.25s, transform 0.25s;
}
.frame--rail a:hover {
  color: var(--accent); background: var(--pill);
  transform: translateY(-2px);
}
.frame--rail svg { width: 17px; height: 17px; display: block; }

/* theme toggle — side rail, like the reference's little side controls */
.frame--theme {
  left: calc(var(--frame-x) - 0.6rem); bottom: 8.5rem;
  width: 2.7rem; height: 2.7rem; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--rule);
  color: var(--ink-dim); cursor: pointer;
  transition: color 0.25s, border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.frame--theme:hover {
  color: var(--accent); border-color: var(--accent);
  background: var(--pill); box-shadow: 0 0 18px var(--glow-lo);
}
.frame--theme svg { width: 16px; height: 16px; display: block; }
.frame--theme .icon-moon { display: none; }
:root[data-theme="light"] .frame--theme .icon-sun { display: none; }
:root[data-theme="light"] .frame--theme .icon-moon { display: block; }

.frame--hint {
  left: 50%; bottom: 1.4rem; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-faint); text-decoration: none;
  transition: color 0.25s, opacity 0.4s;
}
.frame--hint:hover { color: var(--accent); }
.frame--hint span { display: inline-block; animation: bob 1.8s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(4px); } }
body.scrolled .frame--hint { opacity: 0; pointer-events: none; }

/* ---------- hero ---------- */

main { position: relative; z-index: 1; }

section { padding-left: var(--content-x); padding-right: var(--frame-x); }

.hero {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding-bottom: clamp(4rem, 12vh, 8rem);
  position: relative;
}

.hero-spark {
  position: absolute; inset: auto 0 0 0; height: 62vh; width: 100%;
  pointer-events: none; opacity: 0.55;
}
.spark-line {
  fill: none; stroke: var(--accent); stroke-width: 1.6;
  filter: drop-shadow(0 0 6px var(--glow-hi));
  stroke-dasharray: 2400; stroke-dashoffset: 2400;
  animation: draw 3.2s cubic-bezier(0.6, 0, 0.2, 1) 0.5s forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }
.spark-fill {
  fill: color-mix(in srgb, var(--accent) 6%, transparent); stroke: none;
  opacity: 0; animation: fadein 1.6s ease 2.2s forwards;
}
@keyframes fadein { to { opacity: 1; } }

.kicker {
  font-family: var(--font-mono); font-size: clamp(0.62rem, 1.4vw, 0.8rem);
  letter-spacing: 0.28em; text-transform: uppercase; color: var(--ink-dim);
  margin-bottom: 1.6rem;
}

.hero h1 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(3.2rem, 11.5vw, 9.5rem);
  line-height: 0.98; letter-spacing: -0.03em;
  text-transform: uppercase;
}
.hero h1 .line { display: block; }

.cycle-word {
  color: var(--accent);
  text-shadow: 0 0 30px var(--glow-hi), 0 0 90px var(--glow-lo);
  display: inline-block; min-width: 4ch;
  /* it's a <button>: strip chrome, inherit the giant display type */
  font: inherit; letter-spacing: inherit; text-transform: inherit;
  background: none; border: none; padding: 0; cursor: pointer;
  text-align: left; transition: text-shadow 0.3s;
}
.cycle-word:hover {
  text-shadow: 0 0 40px var(--glow-hi), 0 0 120px var(--glow-lo);
}
.cycle-word:focus-visible { outline: 2px dashed var(--accent); outline-offset: 8px; }
.cycle-word.is-out { animation: word-out 0.35s ease forwards; }
.cycle-word.is-in  { animation: word-in 0.45s cubic-bezier(0.2, 0.9, 0.3, 1) forwards; }
@keyframes word-out { to { opacity: 0; transform: translateY(-0.35em) skewY(-3deg); filter: blur(6px); } }
@keyframes word-in  { from { opacity: 0; transform: translateY(0.35em) skewY(3deg); filter: blur(6px); } }

.hero-rule {
  margin-top: 2.4rem; height: 1px; width: min(38rem, 60%);
  background: linear-gradient(90deg, var(--accent), transparent 85%);
  position: relative; overflow: visible;
}
.hero-rule::after {
  content: ""; position: absolute; top: -2px; left: 0; width: 5px; height: 5px;
  border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: slide 4.5s ease-in-out infinite;
}
@keyframes slide { 0%, 100% { left: 0; } 50% { left: calc(100% - 5px); } }

/* load-in stagger */
.reveal-load { opacity: 0; transform: translateY(28px); animation: rise 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards; animation-delay: calc(var(--i) * 0.14s + 0.2s); }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ---------- shared ---------- */

.label {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.3em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1.8rem;
}
.label::before { content: "// "; color: var(--ink-faint); }

.section-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 3rem); line-height: 1.15; letter-spacing: -0.02em;
  max-width: 24ch; margin-bottom: clamp(3rem, 8vh, 5.5rem);
}

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- about ---------- */

.about { padding-top: clamp(6rem, 16vh, 11rem); padding-bottom: clamp(5rem, 12vh, 9rem); position: relative; }

.orb { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(70px); }
.orb--a {
  width: 44vw; height: 44vw; max-width: 620px; max-height: 620px;
  top: -6%; right: -8%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 13%, transparent), transparent 65%);
  animation: drift 14s ease-in-out infinite alternate;
}
.orb--b {
  width: 30vw; height: 30vw; max-width: 430px; max-height: 430px;
  bottom: 0; left: 4%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 7%, transparent), transparent 65%);
  animation: drift 18s ease-in-out infinite alternate-reverse;
}
@keyframes drift { to { transform: translate(-4vw, 5vh) scale(1.12); } }

.about-lede {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.9rem); line-height: 1.28; letter-spacing: -0.015em;
  max-width: 26ch;
}
.about-lede em {
  font-style: normal; color: var(--accent);
  text-shadow: 0 0 24px var(--glow-lo);
}
.about-sub {
  margin-top: 2.2rem; max-width: 52ch;
  color: var(--ink-dim); font-size: clamp(0.95rem, 1.6vw, 1.1rem);
}

.stats {
  margin-top: clamp(3.5rem, 8vh, 5.5rem);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1px; background: var(--rule);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  max-width: 56rem;
}
.stat { background: var(--bg); padding: 1.6rem 1.4rem; transition: background 0.3s; }
.stat:hover { background: var(--bg-raise); }
.stat:hover .stat-num { text-shadow: 0 0 34px var(--glow-hi); }
.stat-num {
  display: block; font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem); color: var(--accent);
  letter-spacing: -0.02em; line-height: 1;
  text-shadow: 0 0 22px var(--glow-lo);
}
.stat-cap {
  display: block; margin-top: 0.55rem;
  font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-dim);
}

/* ---------- history ---------- */

.history { padding-top: clamp(5rem, 12vh, 9rem); }

.timeline { list-style: none; }

.entry {
  display: grid; grid-template-columns: minmax(4.5rem, 8rem) 1fr;
  gap: 0 clamp(1rem, 4vw, 3.5rem);
  padding: clamp(1.4rem, 3.2vh, 2.1rem) clamp(0.9rem, 2vw, 1.5rem);
  border-top: 1px solid var(--rule);
  position: relative;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.timeline > .entry:last-child { border-bottom: 1px solid var(--rule); }

.entry-year {
  font-family: var(--font-mono); font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  color: var(--ink-dim); padding-top: 0.35rem;
  transition: color 0.3s;
}

.entry h3 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 2.3rem); line-height: 1.1; letter-spacing: -0.02em;
  transition: color 0.3s, font-size 0.35s ease;
}
.entry-org {
  margin-top: 0.45rem; font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.06em; color: var(--ink-dim);
}
.entry-note { max-width: 52ch; color: var(--ink-dim); font-size: 0.92rem; }

/* --- experience rows: compact, expand on click (reference: history rows) --- */

.timeline--xp .entry { cursor: pointer; }
.timeline--xp .entry:hover .entry-year,
.timeline--xp .entry:hover h3 { color: var(--accent); }

.timeline--xp .entry-body {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 0 clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.entry-head { grid-column: 1; }
.entry-detail { grid-column: 2; grid-row: 1; }

.entry-title { display: block; }
.entry-toggle {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  width: 100%; padding: 0; background: none; border: none; cursor: pointer;
  font: inherit; color: inherit; letter-spacing: inherit; text-align: left;
}
.entry-toggle:focus-visible { outline: 2px dashed var(--accent); outline-offset: 6px; }

.entry-plus {
  font-family: var(--font-mono); font-weight: 400;
  font-size: 1rem; color: var(--ink-faint);
  transition: transform 0.35s ease, color 0.3s;
}
.timeline--xp .entry:hover .entry-plus { color: var(--accent); }
.entry.is-open .entry-plus { transform: rotate(45deg); color: var(--accent); }

/* collapsed: detail takes no height; open: it unfolds */
.entry-detail { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.45s cubic-bezier(0.4, 0, 0.2, 1); }
.entry-detail-inner { overflow: hidden; }
.entry-note {
  opacity: 0; transform: translateY(10px);
  transition: opacity 0.4s ease 0.05s, transform 0.4s ease 0.05s;
  padding-bottom: 0.2rem;
}

/* open state: row becomes a raised card, title condenses (like the reference invert) */
.entry.is-open {
  background: var(--bg-raise);
  box-shadow: inset 2px 0 0 var(--accent);
}
.entry.is-open h3 { font-size: clamp(1.1rem, 1.9vw, 1.45rem); }
.entry.is-open .entry-year { color: var(--accent); }
.entry.is-open .entry-detail { grid-template-rows: 1fr; }
.entry.is-open .entry-note { opacity: 1; transform: none; }

.label--edu { margin-top: clamp(4rem, 10vh, 7rem); }
.timeline--edu .entry h3 { font-size: clamp(1.05rem, 2vw, 1.45rem); }

/* ---------- skills marquee ---------- */

.skills {
  padding: clamp(4rem, 10vh, 7rem) 0;
  overflow: hidden;
}
.marquee {
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 1.4rem 0; overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex; align-items: center; gap: 2.5rem; width: max-content;
  animation: scroll 28s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.1rem, 2.4vw, 1.8rem); letter-spacing: 0.02em;
  text-transform: uppercase; color: var(--ink-dim); white-space: nowrap;
  transition: color 0.25s, text-shadow 0.25s;
}
.marquee-track span:hover { color: var(--accent); text-shadow: 0 0 20px var(--glow-lo); }
.marquee-track i { color: var(--accent); font-style: normal; font-size: 0.9rem; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- contact ---------- */

.contact {
  padding-top: clamp(4rem, 10vh, 7rem);
  padding-bottom: clamp(6rem, 14vh, 10rem);
  position: relative;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--card-rule);
  max-width: 34rem;
  padding: 0.4rem 2rem 1.6rem;
  position: relative;
}
.contact-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 2px;
  background: linear-gradient(180deg, var(--accent), transparent);
}
.contact-link {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: 1.3rem 0.4rem; text-decoration: none;
  border-bottom: 1px solid var(--card-rule);
  position: relative; overflow: hidden;
}
/* fill sweep on hover (reference: .btn::before clip-path wipe) */
.contact-link::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 10%, transparent), color-mix(in srgb, var(--accent) 2%, transparent));
  clip-path: inset(0 100% 0 0);
  transition: clip-path 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}
.contact-link:hover::before { clip-path: inset(0 0 0 0); }
.contact-link:hover .contact-value { color: var(--card-ink); }
.contact-link .contact-value { transition: color 0.3s; }
.contact-kind {
  font-family: var(--font-display); font-weight: 800; text-transform: uppercase;
  font-size: clamp(1.3rem, 3vw, 1.9rem); letter-spacing: -0.01em; color: var(--card-ink);
  transition: color 0.25s, text-shadow 0.25s;
}
.contact-value {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--card-dim);
  letter-spacing: 0.05em; text-align: right;
}
.contact-link:hover .contact-kind { color: var(--accent); text-shadow: 0 0 24px var(--glow-lo); }
.copyright {
  padding-top: 1.4rem;
  font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.14em;
  color: var(--card-faint); text-transform: uppercase;
}

.to-top {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: 2.5rem;
  width: 3rem; height: 3rem; border: 1px solid var(--rule); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-dim); text-decoration: none; font-size: 1.1rem;
  transition: color 0.25s, border-color 0.25s, box-shadow 0.25s, transform 0.25s, background 0.25s;
}
.to-top:hover {
  color: var(--bg); border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 26px var(--glow-hi);
  transform: translateX(-50%) translateY(-3px);
}

/* ---------- responsive ---------- */

@media (max-width: 760px) {
  :root { --content-x: 1.5rem; }
  .frame--identity { top: 1.1rem; }
  .identity-name { font-size: 1.1rem; }
  .frame--nav { top: 5.5rem; left: var(--frame-x); right: auto; flex-direction: row; gap: 1rem; }
  .frame--nav a { font-size: 0.62rem; letter-spacing: 0.14em; }
  .frame--rail { display: none; }
  .frame--theme { left: 0.9rem; bottom: 1.1rem; width: 2.4rem; height: 2.4rem; }
  .status { font-size: 0.6rem; }
  .hero { padding-bottom: 5.5rem; }
  .hero h1 { font-size: clamp(2rem, 9.5vw, 4.5rem); }
  .entry { grid-template-columns: 1fr; gap: 0.4rem; padding-inline: 0.8rem; }
  .entry-year { padding-top: 0; }
  .timeline--xp .entry-body { grid-template-columns: 1fr; }
  .entry-detail { grid-column: 1; grid-row: auto; }
  .entry.is-open .entry-note { margin-top: 0.8rem; }
  .to-top { bottom: 2rem; }
  .contact-card { padding: 0.2rem 1.2rem 1.2rem; }
  .contact-link { flex-wrap: wrap; gap: .4rem; }
  .contact-value { font-size: 0.62rem; overflow-wrap: anywhere; }
  .about { overflow: clip; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal-load { opacity: 1; transform: none; animation: none; transition: none; }
  .spark-line { animation: none; stroke-dashoffset: 0; }
  .spark-fill { animation: none; opacity: 1; }
  .marquee-track { animation: none; }
  .hero-rule::after, .status-dot, .frame--hint span { animation: none; }
  .orb--a, .orb--b { animation: none; }
  .entry, .entry h3, .entry-detail, .entry-note, .entry-plus { transition: none; }
  body { transition: none; }
}