/* ==========================================================================
   Harsh Agarwal — portfolio
   Design system: "control plane" dark theme.
   Sections: tokens · base · layout · components · sections · utilities · motion
   ========================================================================== */

/* ---------- Fonts (self-hosted, OFL-1.1) ---------- */
@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  color-scheme: dark;

  --bg: #070b14;
  --bg-elev: #0b111d;
  --surface: #0d1422;
  --raised: #121b2c;
  --line: #1e2a3f;
  --line-strong: #2a3a55;
  --line-faint: rgba(125, 216, 255, 0.045);

  --text: #e6edf7;
  --text-2: #b4c0d3;
  --text-3: #8b9bb4;

  --accent: #5ad1ff;
  --accent-hover: #8fe0ff;
  --accent-ink: #04121c;
  --accent-soft: rgba(90, 209, 255, 0.1);
  --accent-line: rgba(90, 209, 255, 0.45);
  --violet: #a78bfa;
  --violet-text: #cdbeff;
  --violet-soft: rgba(167, 139, 250, 0.1);
  --ok: #34d399;
  --ok-text: #6ee7b7;
  --warn: #fbbf24;
  --danger: #f87171;
  --danger-text: #fca5a5;

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

  --fs-xs: 0.8125rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.0625rem;
  --fs-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  --fs-h3: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
  --fs-h2: clamp(1.75rem, 1.25rem + 2vw, 2.625rem);
  --fs-h1: clamp(2.25rem, 1.3rem + 4vw, 4rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --section-y: clamp(3.5rem, 2.5rem + 3.5vw, 5.5rem);
  --gutter: clamp(1rem, 0.6rem + 2vw, 2rem);
  --container: 1200px;

  --r-sm: 7px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;

  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 24px 48px -32px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 40px 100px -50px rgba(90, 209, 255, 0.45);

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 180ms;
  --header-h: 68px;
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(90, 209, 255, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(167, 139, 250, 0.06), transparent 60%),
    linear-gradient(var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  background-attachment: scroll;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked,
body:has(.dialog[open]) {
  overflow: hidden;
}

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

img {
  height: auto;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 650;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-hover);
}

code,
kbd,
pre,
samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

:not(pre) > code {
  padding: 0.1em 0.4em;
  border-radius: 5px;
  background: var(--raised);
  border: 1px solid var(--line);
  color: var(--text);
  white-space: nowrap;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

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

::selection {
  background: rgba(90, 209, 255, 0.3);
  color: #fff;
}

[hidden] {
  display: none !important;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
  position: relative;
}

.section + .section {
  border-top: 1px solid rgba(30, 42, 63, 0.6);
}

.section-head {
  display: grid;
  gap: var(--space-3);
  margin-bottom: clamp(2rem, 1.5rem + 2vw, 3rem);
  max-width: 760px;
}

.section-head--split {
  max-width: none;
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-5);
}

.section-head--split > div:first-child {
  display: grid;
  gap: var(--space-3);
  max-width: 680px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.02em;
}

.section-title {
  font-size: var(--fs-h2);
}

.lede {
  color: var(--text-2);
  font-size: var(--fs-lg);
  line-height: 1.65;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-3);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 1.375rem;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--fs-base);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: var(--accent-ink);
}

.btn--secondary {
  border-color: var(--line-strong);
  background: rgba(13, 20, 34, 0.6);
  color: var(--text);
}

.btn--secondary:hover {
  border-color: var(--accent-line);
  color: var(--text);
  background: var(--surface);
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
  padding-inline: var(--space-3);
}

.btn--ghost:hover {
  color: var(--accent-hover);
  background: var(--accent-soft);
}

.btn--sm {
  min-height: 44px;
  padding: 0 1rem;
  font-size: var(--fs-sm);
}

.btn:active {
  transform: translateY(1px);
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(13, 20, 34, 0.6);
  color: var(--text-2);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.icon-btn:hover {
  color: var(--text);
  border-color: var(--accent-line);
  background: var(--surface);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

/* ---------- Chips & badges ---------- */
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  border: 1px solid #22314a;
  background: var(--raised);
  color: #c8d3e3;
  font-size: var(--fs-xs);
  line-height: 1.4;
}

.chip--mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--text-2);
  white-space: nowrap;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge--ok {
  border-color: rgba(52, 211, 153, 0.4);
  color: var(--ok-text);
}

.badge--planned {
  border-style: dashed;
  border-color: rgba(167, 139, 250, 0.6);
  color: var(--violet-text);
}

.badge--info {
  border-color: var(--accent-line);
  color: #b5e9ff;
}

.badge--muted {
  color: var(--text-3);
}

/* ---------- Cards ---------- */
.card {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 27, 44, 0.55), rgba(11, 17, 29, 0.9));
  box-shadow: var(--shadow-card);
}

.card--pad {
  padding: clamp(1.25rem, 1rem + 1vw, 1.75rem);
}

/* ---------- Header / navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid transparent;
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: rgba(30, 42, 63, 0.9);
  background: rgba(7, 11, 20, 0.9);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  min-height: 44px;
}

.brand:hover {
  color: var(--text);
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 0;
  list-style: none;
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.75rem;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: var(--fs-sm);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav__link:hover {
  color: var(--text);
  background: rgba(18, 27, 44, 0.7);
}

.nav__link[aria-current="true"] {
  color: var(--text);
}

.nav__link[aria-current="true"]::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.nav__cta {
  margin-left: var(--space-2);
}

.nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.nav__toggle-bars {
  position: relative;
  width: 18px;
  height: 12px;
}

.nav__toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
}

.nav__toggle-bars span:nth-child(1) { top: 0; }
.nav__toggle-bars span:nth-child(2) { top: 5px; }
.nav__toggle-bars span:nth-child(3) { top: 10px; }

.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(1) { top: 5px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(3) { top: 5px; transform: rotate(-45deg); }

@media (max-width: 1023.98px) {
  .nav__toggle {
    display: inline-flex;
  }

  .nav__menu {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    padding: var(--space-4) var(--gutter) var(--space-6);
    background: rgba(7, 11, 20, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.8);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  }

  .nav__menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s;
  }

  .nav__links {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav__link {
    min-height: 48px;
    padding: 0 var(--space-4);
    font-size: var(--fs-base);
  }

  .nav__link[aria-current="true"] {
    background: var(--accent-soft);
  }

  .nav__link[aria-current="true"]::after {
    left: 0;
    right: auto;
    top: 12px;
    bottom: 12px;
    width: 2px;
    height: auto;
  }

  .nav__cta {
    margin: var(--space-4) 0 0;
    width: 100%;
  }
}

/* ---------- Hero ---------- */
.hero {
  padding-block: clamp(3.5rem, 2rem + 6vw, 7rem) clamp(3.5rem, 2.5rem + 4vw, 6rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 1.5rem + 3vw, 4.5rem);
  align-items: center;
}

.hero__copy {
  display: grid;
  gap: var(--space-5);
  justify-items: start;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(13, 20, 34, 0.7);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.status-pill__dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
}

.hero__title {
  font-size: var(--fs-h1);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 700;
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__intro {
  max-width: 36rem;
  color: var(--text-2);
  font-size: var(--fs-lg);
  line-height: 1.65;
}

.hero__intro strong {
  color: var(--text);
  font-weight: 600;
}

.role-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5ch;
  min-height: 1.6em;
  font-family: var(--font-mono);
  font-size: clamp(0.875rem, 0.82rem + 0.25vw, 1rem);
  color: var(--text-3);
}

.role-line__value {
  color: var(--text);
}

.role-line__caret {
  display: inline-block;
  width: 0.55em;
  height: 1.1em;
  translate: 0 0.18em;
  background: var(--accent);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.hero__social {
  display: flex;
  gap: var(--space-2);
}

/* ---------- Terminal ---------- */
.terminal {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: #0a0f1a;
  box-shadow: var(--shadow-glow), var(--shadow-card);
  overflow: hidden;
  min-width: 0;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid #172236;
  background: var(--surface);
}

.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line-strong);
}

.terminal__title {
  margin-left: 8px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
}

.terminal__replay {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.terminal__replay:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.terminal__replay svg {
  width: 12px;
  height: 12px;
}

.terminal__body {
  margin: 0;
  padding: clamp(1rem, 0.8rem + 1vw, 1.375rem);
  min-height: 21.5em;
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 0.7rem + 0.25vw, 0.84rem);
  line-height: 1.75;
  color: #c8d3e3;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.terminal__body .t-prompt { color: var(--accent); }
.terminal__body .t-muted { color: var(--text-3); }
.terminal__body .t-ok { color: var(--ok-text); }
.terminal__body .t-warn { color: var(--warn); }
.terminal__body .t-key { color: var(--violet-text); }

.terminal__caption {
  padding: 10px 16px;
  border-top: 1px solid #172236;
  font-size: 0.75rem;
  color: var(--text-3);
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  grid-template-areas:
    "intro photo"
    "body  photo";
  column-gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  row-gap: 0;
  align-items: start;
}

.about__intro { grid-area: intro; }
.about__photo { grid-area: photo; }
.about__body { grid-area: body; }

.about__intro {
  display: grid;
  gap: var(--space-5);
}

.about__photo {
  margin: 0;
  width: 100%;
  max-width: 420px;
  border-radius: var(--r-xl);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

/* ---------- Photo carousel ---------- */
.carousel {
  position: relative;
}

.carousel__track {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  aspect-ratio: 3 / 4;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  background: var(--raised);
}

.carousel__track::-webkit-scrollbar {
  display: none;
}

.carousel__track:focus-visible {
  outline-offset: -3px;
  border-radius: 0;
}

.carousel__slide {
  flex: 0 0 100%;
  height: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.carousel__slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Pause control: hidden until a keyboard user tabs to it (hover already pauses). */
.carousel__pause {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(7, 11, 20, 0.75);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}

.carousel__pause:focus-visible {
  opacity: 1;
  pointer-events: auto;
}

.carousel__pause svg {
  width: 18px;
  height: 18px;
}

.about__photo figcaption {
  display: grid;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--line);
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.5;
}

.about__photo strong {
  color: var(--text);
  font-size: var(--fs-base);
}

.about__body {
  display: grid;
  gap: var(--space-4);
  color: var(--text-2);
  font-size: var(--fs-md);
  line-height: 1.75;
}

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.fact {
  padding: var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(11, 17, 29, 0.8);
}

.fact dt {
  font-size: var(--fs-xs);
  color: var(--text-3);
}

.fact dd {
  margin-top: 2px;
  color: var(--text);
  font-weight: 600;
  line-height: 1.4;
}

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: var(--space-3);
  margin-top: var(--space-7);
  padding: 0;
  list-style: none;
}

.principle {
  display: grid;
  gap: 6px;
  padding: var(--space-5);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(11, 17, 29, 0.6);
}

.principle svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.principle h3 {
  font-size: var(--fs-base);
}

.principle p {
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

/* ---------- Skills ---------- */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr));
  gap: var(--space-4);
}

.skill-group {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.skill-group:hover {
  border-color: var(--line-strong);
}

.skill-group__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.skill-group__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--accent);
  flex: none;
}

.skill-group__icon svg {
  width: 20px;
  height: 20px;
}

.skill-group h3 {
  font-size: var(--fs-base);
}

.skill-group__note {
  color: var(--text-3);
  font-size: var(--fs-sm);
  line-height: 1.55;
}

/* ---------- Experience timeline ---------- */
.timeline {
  position: relative;
  display: grid;
  gap: var(--space-5);
  padding: 0;
  list-style: none;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 1px;
  background: linear-gradient(var(--line-strong), var(--line) 80%, transparent);
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: var(--space-5);
}

.timeline__marker {
  position: relative;
  z-index: 1;
  width: 23px;
  height: 23px;
  margin-top: 24px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--bg);
  display: grid;
  place-items: center;
}

.timeline__marker::after {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-3);
}

.timeline__item--current .timeline__marker {
  border-color: var(--accent-line);
}

.timeline__item--current .timeline__marker::after {
  background: var(--accent);
}

.timeline__item--project .timeline__marker::after {
  background: var(--violet);
}

.timeline__card {
  display: grid;
  gap: var(--space-3);
}

.timeline__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-3);
}

.timeline__title {
  font-size: var(--fs-h3);
}

.timeline__org {
  color: var(--text-2);
  font-weight: 500;
}

.timeline__card > p {
  color: var(--text-2);
  line-height: 1.7;
}

.list {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
  color: var(--text-2);
  line-height: 1.6;
}

.list li {
  position: relative;
  padding-left: 1.25rem;
}

.list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--accent);
  opacity: 0.8;
}

/* ---------- Projects ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter {
  min-height: 44px;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid #22314a;
  background: transparent;
  color: var(--text-2);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: all var(--dur) var(--ease);
}

.filter:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.filter[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

.filter__count {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-4);
}

.project {
  grid-column: span 3;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.project:hover {
  border-color: var(--line-strong);
}

.project--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 0;
  padding: 0;
  overflow: hidden;
  border-color: #24344f;
}

.project--compact {
  grid-column: span 2;
}

.project__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: clamp(1.25rem, 1rem + 1.2vw, 2rem);
  min-width: 0;
}

.project__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.project__kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--violet-text);
}

.project__title {
  font-size: var(--fs-h3);
}

.project--featured .project__title {
  font-size: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
}

.project__desc {
  color: var(--text-2);
  line-height: 1.65;
}

.project__problem {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  background: rgba(18, 27, 44, 0.6);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.project__problem strong {
  color: var(--text);
  font-weight: 600;
}

.project__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-2);
}

.proof {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 120px), 1fr));
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

.proof li {
  padding: var(--space-3);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.5);
}

.proof strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.proof span {
  font-size: 0.75rem;
  color: var(--text-3);
  line-height: 1.4;
}

.project__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-2);
  padding: clamp(1.25rem, 1rem + 1.2vw, 2rem);
  border-left: 1px solid #172236;
  background:
    linear-gradient(var(--line-faint) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px) 0 0 / 24px 24px,
    #090e18;
  min-width: 0;
}

.project__visual-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  margin-bottom: var(--space-2);
}

.flow {
  display: grid;
  gap: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.flow__step {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 10px 12px;
  border-radius: var(--r-md);
  border: 1px solid #22314a;
  background: var(--surface);
  color: #c8d3e3;
}

.flow__step + .flow__step {
  margin-top: 22px;
}

.flow__step + .flow__step::before {
  content: "";
  position: absolute;
  left: 20px;
  top: -22px;
  height: 22px;
  width: 1px;
  background: linear-gradient(var(--line-strong), var(--accent-line));
}

.flow__step--key {
  border-color: var(--accent-line);
  background: rgba(90, 209, 255, 0.07);
}

.flow__step small {
  color: var(--text-3);
  font-size: 0.68rem;
  white-space: nowrap;
}

.flow__fan {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: 22px;
  position: relative;
}

.flow__fan::before {
  content: "";
  position: absolute;
  left: 20px;
  top: -22px;
  height: 22px;
  width: 1px;
  background: linear-gradient(var(--line-strong), var(--accent-line));
}

.flow__fan span {
  padding: 9px 6px;
  border-radius: var(--r-md);
  border: 1px solid #22314a;
  background: var(--surface);
  text-align: center;
  color: #c8d3e3;
}

.flow__fan span.is-planned {
  border-style: dashed;
  border-color: rgba(167, 139, 250, 0.6);
  color: var(--violet-text);
  background: transparent;
}

.project__module-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.project__module-grid li {
  padding: 8px 6px;
  border-radius: var(--r-sm);
  border: 1px solid #22314a;
  background: var(--surface);
  color: #c8d3e3;
  text-align: center;
  overflow-wrap: anywhere;
}

.projects__empty {
  grid-column: 1 / -1;
  padding: var(--space-6);
  border-radius: var(--r-lg);
  border: 1px dashed var(--line-strong);
  color: var(--text-2);
  text-align: center;
}

.projects__more {
  margin-top: var(--space-5);
  color: var(--text-3);
  font-size: var(--fs-sm);
}

/* ---------- Project dialog ---------- */
.dialog {
  width: min(860px, calc(100vw - 2rem));
  max-height: min(88vh, 900px);
  max-height: min(88dvh, 900px);
  padding: 0;
  border-radius: var(--r-xl);
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  color: var(--text);
  box-shadow: 0 50px 120px -40px rgba(0, 0, 0, 0.9);
  overflow: hidden;
}

.dialog[open] {
  display: flex;
  flex-direction: column;
}

.dialog::backdrop {
  background: rgba(3, 6, 12, 0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.dialog__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--line);
}

.dialog__head h2 {
  font-size: clamp(1.25rem, 1.1rem + 0.8vw, 1.625rem);
}

.dialog__head p {
  margin-top: 6px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.dialog__close {
  flex: none;
}

.dialog__body {
  padding: var(--space-5);
  overflow-y: auto;
  overscroll-behavior: contain;
  display: grid;
  gap: var(--space-6);
}

.dialog__section {
  display: grid;
  gap: var(--space-3);
}

.dialog__section h3 {
  font-size: var(--fs-sm);
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.dialog__section > p {
  color: var(--text-2);
  line-height: 1.7;
}

.dialog__foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.6);
}

.decision-list {
  display: grid;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

.decision-list li {
  display: grid;
  gap: 4px;
  padding: var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(18, 27, 44, 0.4);
}

.decision-list strong {
  font-size: var(--fs-sm);
  color: var(--text);
}

.decision-list span {
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

/* ---------- Architecture ---------- */
.arch {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.arch__canvas {
  position: relative;
  padding: clamp(1rem, 0.6rem + 1.6vw, 2rem);
  overflow: hidden;
}

.arch__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--bg);
}

.segmented button {
  min-height: 40px;
  padding: 0 0.875rem;
  border-radius: 7px;
  border: 0;
  background: transparent;
  color: var(--text-2);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.segmented button[aria-pressed="true"] {
  background: var(--raised);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  padding: 0;
  list-style: none;
  font-size: 0.75rem;
  color: var(--text-3);
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend__swatch {
  width: 22px;
  height: 12px;
  border-radius: 4px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.legend__swatch--key { border-color: var(--accent); background: var(--accent-soft); }
.legend__swatch--planned { border: 1px dashed var(--violet); background: transparent; }
.legend__swatch--support { border-color: #3a4c6b; border-style: dotted; background: transparent; }

.diagram {
  display: grid;
  gap: var(--space-5);
}

.diagram__lane {
  display: grid;
  gap: var(--space-2);
}

.diagram__lane-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
}

.diagram__row {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0;
  list-style: none;
}

.diagram__row > li {
  display: flex;
  align-items: stretch;
  flex: 1 1 0;
  min-width: 0;
}

.diagram__row > li + li::before {
  content: "";
  flex: 0 0 26px;
  align-self: center;
  height: 10px;
  background:
    linear-gradient(var(--line-strong), var(--line-strong)) left center / calc(100% - 7px) 1px no-repeat,
    conic-gradient(from 225deg at 100% 50%, var(--accent-line) 0 90deg, transparent 0) right center / 8px 10px no-repeat;
}

.node {
  position: relative;
  flex: 1 1 auto;
  display: grid;
  align-content: start;
  gap: 6px;
  width: 100%;
  min-height: 92px;
  padding: 12px;
  border-radius: var(--r-md);
  border: 1px solid #22314a;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.node:hover {
  border-color: var(--line-strong);
  background: var(--raised);
}

.node__icon {
  width: 18px;
  height: 18px;
  color: var(--text-3);
}

.node__name {
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.3;
}

.node__sub {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-3);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.node--key .node__icon { color: var(--accent); }

.node--planned {
  border-style: dashed;
  border-color: rgba(167, 139, 250, 0.65);
  background: transparent;
}

.node--planned .node__icon { color: var(--violet); }

.node--support {
  border-style: dotted;
  border-color: #3a4c6b;
  background: rgba(13, 20, 34, 0.5);
}

.node[aria-pressed="true"] {
  border-color: var(--accent);
  background: rgba(90, 209, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(90, 209, 255, 0.12);
}

.node--planned[aria-pressed="true"] {
  border-color: var(--violet);
  background: var(--violet-soft);
  box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.14);
}

.diagram__support {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}

.diagram__lane--support {
  margin-top: var(--space-5);
}

.diagram__note {
  font-size: 0.75rem;
  color: var(--text-3);
  line-height: 1.55;
}

.arch__detail {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: var(--space-3) var(--space-6);
}

.arch__detail > * {
  max-width: 100%;
}

@media (min-width: 1100px) {
  .arch__detail {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr) minmax(0, 0.9fr);
    grid-template-areas:
      "status body where"
      "title  body where";
    align-items: start;
  }

  .arch__detail [data-arch-status] { grid-area: status; }
  .arch__detail [data-arch-title] { grid-area: title; }
  .arch__detail [data-arch-body] { grid-area: body; }
  .arch__detail .arch__where { grid-area: where; width: 100%; }
}

@media (min-width: 720px) and (max-width: 1099.98px) {
  .arch {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }

  .arch__detail {
    position: sticky;
    top: calc(var(--header-h) + 16px);
  }
}

/* On phones the detail panel is moved inline, directly under the selected node. */
.diagram__row > li > .arch__detail,
.diagram__support > li > .arch__detail {
  margin-top: var(--space-2);
  width: 100%;
  box-shadow: none;
  border-color: var(--line-strong);
}

.arch__detail h3 {
  font-size: var(--fs-h3);
}

.arch__detail p {
  color: var(--text-2);
  line-height: 1.65;
  font-size: var(--fs-sm);
}

.arch__where {
  display: grid;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.5);
  font-size: var(--fs-xs);
  color: var(--text-3);
}

.arch__where strong {
  color: var(--text);
  font-weight: 500;
  font-size: var(--fs-sm);
}

/* ---------- Pipeline explorer ---------- */
.explorer {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  overflow: hidden;
}

.explorer__aside {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  padding: var(--space-5);
  border-right: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.35);
}

.stage-list {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: stage;
}

.stage {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 48px;
  padding: 6px 10px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-2);
  text-align: left;
  font-size: var(--fs-sm);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.stage:hover {
  background: rgba(18, 27, 44, 0.7);
  color: var(--text);
}

.stage[aria-selected="true"] {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--text);
}

.stage__icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
}

.stage[data-state="passed"] .stage__icon {
  border-color: rgba(52, 211, 153, 0.5);
  color: var(--ok-text);
}

.stage[data-state="running"] .stage__icon {
  border-color: var(--accent);
  color: var(--accent);
}

.stage[data-state="gate"] .stage__icon {
  border-style: dashed;
  border-color: var(--violet);
  color: var(--violet-text);
}

.stage__name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage__tag {
  font-size: 0.68rem;
  color: var(--text-3);
}

.explorer__main {
  display: grid;
  grid-template-rows: auto auto 1fr;
  min-width: 0;
}

.explorer__head {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5) var(--space-4);
}

.explorer__head h3 {
  font-family: var(--font-mono);
  font-size: var(--fs-h3);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.explorer__head p {
  color: var(--text-2);
  line-height: 1.65;
  font-size: var(--fs-sm);
}

.explorer__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: var(--space-3);
  padding: 0 var(--space-5) var(--space-4);
}

.explorer__fact {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.45);
}

.explorer__fact dt {
  font-size: 0.72rem;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.explorer__fact dd {
  margin-top: 4px;
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.55;
}

.explorer__output {
  margin: 0 var(--space-5) var(--space-5);
  border-radius: var(--r-md);
  border: 1px solid #172236;
  background: #070b13;
  overflow: hidden;
  min-width: 0;
}

.explorer__output-bar {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 8px 12px;
  border-bottom: 1px solid #172236;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
}

.explorer__output pre {
  margin: 0;
  padding: var(--space-4);
  font-size: 0.78rem;
  line-height: 1.7;
  color: #c8d3e3;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 300px;
  overflow-y: auto;
}

.explorer__output .o-cmd { color: var(--accent); }
.explorer__output .o-add { color: var(--ok-text); }
.explorer__output .o-chg { color: var(--warn); }
.explorer__output .o-del { color: var(--danger-text); }
.explorer__output .o-dim { color: var(--text-3); }

.explorer__controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.disclaimer {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--text-3);
}

.disclaimer svg {
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 2px;
}

/* ---------- Learning ---------- */
.learning__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: var(--space-4);
}

.learn-card {
  display: grid;
  align-content: start;
  gap: var(--space-3);
}

.learn-card h3 {
  font-size: var(--fs-base);
}

.learn-card p {
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.learn-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.article-list {
  display: grid;
  gap: 2px;
  padding: 0;
  list-style: none;
}

.article-list a {
  display: grid;
  gap: 2px;
  padding: var(--space-3);
  margin-inline: calc(var(--space-3) * -1);
  border-radius: var(--r-md);
  color: var(--text);
  text-decoration: none;
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1.45;
}

.article-list a:hover {
  background: rgba(18, 27, 44, 0.7);
}

.article-list span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  font-weight: 400;
}

/* ---------- Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: start;
}

.contact__intro {
  display: grid;
  gap: var(--space-5);
}

.contact__channels {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  list-style: none;
}

.channel {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 56px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(11, 17, 29, 0.7);
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.channel:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: var(--surface);
}

.channel svg {
  flex: none;
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.channel span {
  display: grid;
  min-width: 0;
  font-size: var(--fs-sm);
  font-weight: 500;
}

.channel small {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: #c8d3e3;
}

.field label .req {
  color: var(--text-3);
  font-weight: 400;
}

.input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border-radius: var(--r-md);
  border: 1px solid #22314a;
  background: var(--bg);
  color: var(--text);
  font-size: var(--fs-base);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

textarea.input {
  min-height: 150px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.55;
}

.input::placeholder {
  color: #66768f;
}

.input:hover {
  border-color: var(--line-strong);
}

.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 209, 255, 0.18);
}

.input[aria-invalid="true"] {
  border-color: var(--danger);
}

.input[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}

.field__error {
  min-height: 1.2em;
  font-size: var(--fs-xs);
  color: var(--danger-text);
}

.field__hint {
  font-size: var(--fs-xs);
  color: var(--text-3);
}

.form__honeypot {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.form__foot {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.form__privacy {
  font-size: var(--fs-xs);
  color: var(--text-3);
  max-width: 34ch;
}

.form-status {
  grid-column: 1 / -1;
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-2);
  font-size: var(--fs-sm);
  line-height: 1.55;
}

.form-status:empty {
  display: none;
}

.form-status[data-tone="success"] {
  border-color: rgba(52, 211, 153, 0.45);
  background: rgba(52, 211, 153, 0.07);
  color: #c9f5e2;
}

.form-status[data-tone="error"] {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(248, 113, 113, 0.07);
  color: #fde2e2;
}

.form-status[data-tone="info"] {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: #d9f4ff;
}

.form-status a {
  color: inherit;
  font-weight: 600;
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(4, 18, 28, 0.3);
  border-top-color: var(--accent-ink);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--space-6);
  background: rgba(7, 11, 20, 0.6);
}

.footer__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer__copy {
  display: grid;
  gap: 2px;
  font-size: var(--fs-sm);
  color: var(--text-3);
}

.footer__copy strong {
  color: var(--text-2);
  font-weight: 500;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  padding: 0;
  list-style: none;
}

.footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-2);
  color: var(--text-2);
  font-size: var(--fs-sm);
  text-decoration: none;
}

.footer__links a:hover {
  color: var(--text);
}

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: max(var(--gutter), env(safe-area-inset-right));
  bottom: max(var(--space-5), env(safe-area-inset-bottom));
  z-index: 40;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  background: rgba(13, 20, 34, 0.92);
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s;
}

/* ---------- 404 ---------- */
.notfound {
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100dvh - var(--header-h));
  display: grid;
  place-items: center;
  padding-block: var(--space-8);
}

.notfound__inner {
  display: grid;
  gap: var(--space-5);
  justify-items: start;
  max-width: 640px;
}

.notfound__inner h1 {
  font-size: var(--fs-h2);
}

.notfound__inner > p {
  color: var(--text-2);
  font-size: var(--fs-lg);
}

.notfound .terminal {
  width: 100%;
}

.notfound .terminal__body {
  min-height: 0;
}

/* ---------- Utilities ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.mono {
  font-family: var(--font-mono);
}

.text-muted {
  color: var(--text-3);
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .project--compact {
    grid-column: span 3;
  }
}

@media (max-width: 1023.98px) {
  .hero__grid,
  .about__grid,
  .contact__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .about__grid {
    grid-template-areas:
      "intro"
      "photo"
      "body";
    row-gap: var(--space-6);
  }

  .about__intro .section-head {
    margin-bottom: 0;
  }

  .hero__terminal {
    max-width: 720px;
  }

  .project--featured {
    grid-template-columns: minmax(0, 1fr);
  }

  .project__visual {
    border-left: 0;
    border-top: 1px solid #172236;
  }

  .explorer {
    grid-template-columns: minmax(0, 1fr);
  }

  .explorer__aside {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stage-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(150px, 1fr);
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
  }

  .stage {
    scroll-snap-align: start;
  }
}

@media (max-width: 1099.98px) {
  .diagram__row {
    flex-direction: column;
  }

  .diagram__row > li {
    flex-direction: column;
  }

  .diagram__row > li + li::before {
    flex: 0 0 22px;
    width: 10px;
    height: auto;
    align-self: flex-start;
    margin-left: 22px;
    background:
      linear-gradient(var(--line-strong), var(--line-strong)) center top / 1px calc(100% - 7px) no-repeat,
      conic-gradient(from 135deg at 50% 100%, var(--accent-line) 0 90deg, transparent 0) center bottom / 10px 8px no-repeat;
  }

  .node {
    min-height: 0;
    grid-template-columns: 20px minmax(0, 1fr);
    column-gap: var(--space-3);
    align-items: center;
  }

  .node__icon {
    grid-row: span 2;
  }

  .diagram__support {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 719.98px) {
  .projects__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .project,
  .project--compact,
  .project--featured {
    grid-column: 1 / -1;
  }

  .form {
    grid-template-columns: minmax(0, 1fr);
  }

  .timeline__item {
    grid-template-columns: 18px minmax(0, 1fr);
    gap: var(--space-3);
  }

  .timeline::before {
    left: 8px;
  }

  .timeline__marker {
    width: 17px;
    height: 17px;
  }

  .timeline__marker::after {
    width: 7px;
    height: 7px;
  }

  .dialog__head,
  .dialog__body,
  .dialog__foot {
    padding-inline: var(--space-4);
  }
}

@media (max-width: 479.98px) {
  .hero__actions .btn {
    flex: 1 1 100%;
  }

  .hero__social {
    width: 100%;
  }

  .section-head--split .filters {
    width: 100%;
  }

  .project__module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .terminal__replay span {
    display: none;
  }

  .form__foot .btn {
    width: 100%;
  }
}

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  .status-pill__dot::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--ok);
    animation: ping 2.4s var(--ease) infinite;
  }

  .role-line__caret {
    animation: blink 1.1s steps(1) infinite;
  }

  .spinner {
    animation: spin 0.8s linear infinite;
  }

  .js .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 600ms var(--ease), transform 600ms var(--ease);
  }

  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
  }

  .stage[data-state="running"] .stage__icon {
    animation: pulse 1s ease-in-out infinite;
  }
}

@keyframes ping {
  0% { transform: scale(1); opacity: 0.6; }
  70%, 100% { transform: scale(2.6); opacity: 0; }
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  50% { box-shadow: 0 0 0 4px rgba(90, 209, 255, 0.15); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .site-header,
  .to-top,
  .explorer__controls,
  .form {
    display: none !important;
  }
}