/* ==========================================================================
   Kohinoor Mukherjee — portfolio
   One stylesheet. Tokens first, then layout, then components.
   ========================================================================== */

:root {
  /* ---- colour ---- */
  --bg:            #070D18;
  --bg-deep:       #060B14;
  --surface:       #0B1422;
  --surface-2:     #0C1524;
  --surface-3:     #0E1A2C;

  --line-soft:     rgba(140, 170, 215, 0.12);
  --line:          rgba(140, 170, 215, 0.16);
  --line-strong:   rgba(140, 170, 215, 0.24);

  --text:          #F4F8FD;
  --text-body:     #A9BDD8;
  --text-muted:    #98ACC6;
  --text-dim:      #8FA3BF;
  --text-faint:    #6E829E;
  --text-ghost:    #5D7A9E;
  --text-quiet:    #4E6483;

  --blue:          #4C9AFF;
  --blue-bright:   #8CC0FF;
  --blue-solid:    #2F7CE0;
  --blue-ink:      #A9CBFA;
  --blue-wash:     rgba(47, 124, 224, 0.16);
  --blue-line:     rgba(76, 154, 255, 0.45);
  --blue-glow:     rgba(76, 154, 255, 0.16);

  --mint:          #46D6A8;
  --mint-wash:     rgba(70, 214, 168, 0.14);
  --mint-line:     rgba(70, 214, 168, 0.28);

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

  /* ---- shape & rhythm ---- */
  --r-sm: 8px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 20px;
  --gutter: clamp(20px, 6.6vw, 96px);
  --page-max: 1440px;
  --section: clamp(52px, 7vw, 86px);

  --shadow-tile: 0 18px 40px rgba(3, 8, 18, 0.6);
  --shadow-btn:  0 8px 24px rgba(47, 124, 224, 0.28);
  --shadow-modal: 0 40px 100px rgba(2, 5, 12, 0.75);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ==========================================================================
   Reset & base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.028em;
  line-height: 1.14;
  text-wrap: pretty;
}

p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}
a:hover { color: var(--blue-bright); }

::selection { background: #1E3A66; color: #fff; }

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

/* ==========================================================================
   Utilities
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.mono--accent { color: var(--blue); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--surface-2);
  border: 1px solid var(--blue-line);
  border-radius: var(--r-sm);
  color: var(--text);
}
.skip-link:focus { left: 12px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ambient blue depth — decorative only */
.glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.glow--hero {
  top: -340px; right: -220px;
  width: 900px; height: 900px;
  background: radial-gradient(circle, var(--blue-glow) 0%, rgba(76,154,255,0) 62%);
}
.glow--mint {
  top: 120px; left: -260px;
  width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(70,214,168,0.07) 0%, rgba(70,214,168,0) 65%);
}

/* ==========================================================================
   Site header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(7, 13, 24, 0.82);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 16px;
}
@media (min-width: 900px) {
  .site-header__inner { padding-block: 22px; }
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
}
.brand:hover { color: var(--text); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  flex: 0 0 auto;
  border: 1px solid rgba(140, 170, 215, 0.28);
  border-radius: 9px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--blue);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}
.brand:hover .brand__mark {
  border-color: var(--blue-line);
  background: rgba(76, 154, 255, 0.10);
}
.brand__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
@media (min-width: 900px) {
  .brand__name { font-size: 16px; }
}

/* --- nav --- */

.nav__toggle {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  padding: 0;
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
}
.nav__toggle:hover { color: var(--text); }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
}

.nav__link {
  font-size: 14.5px;
  color: var(--text-dim);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}
.nav__link:hover { color: var(--text); }
.nav__link[aria-current="page"] {
  color: var(--text);
  border-bottom-color: var(--blue);
}

.nav__cv {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 17px;
  border: 1px solid var(--blue-line);
  border-radius: var(--r-sm);
  background: rgba(76, 154, 255, 0.10);
  font-size: 14px;
  font-weight: 500;
  color: #BFD9FF;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.nav__cv:hover {
  background: rgba(76, 154, 255, 0.18);
  border-color: var(--blue);
  color: #DCE9FF;
}

@media (max-width: 899px) {
  .nav__toggle { display: grid; }
  .nav {
    position: fixed;
    inset: 61px 0 auto 0;
    padding: 10px var(--gutter) 26px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
  }
  .nav[data-open="true"] {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav__link {
    padding: 15px 2px;
    border-bottom: 1px solid var(--line-soft);
    font-size: 16.5px;
  }
  .nav__link[aria-current="page"] { color: var(--blue); }
  .nav__cv {
    margin-top: 14px;
    justify-content: center;
    height: 50px;
    font-size: 15.5px;
  }
}
@media (min-width: 900px) {
  .nav__toggle { display: none; }
  .nav { display: block !important; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background 0.18s var(--ease),
              border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn svg { flex: 0 0 auto; }

.btn--primary {
  background: var(--blue-solid);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn--primary:hover { background: #3B8AF0; color: #fff; }

.btn--ghost {
  border-color: var(--line-strong);
  background: rgba(12, 21, 36, 0.7);
  color: #D3E1F3;
}
.btn--ghost:hover {
  border-color: var(--blue-line);
  background: rgba(76, 154, 255, 0.08);
  color: var(--text);
}

.btn--quiet {
  background: var(--blue-wash);
  color: var(--blue-ink);
}
.btn--quiet:hover { background: rgba(47, 124, 224, 0.26); color: #C9DFFF; }

.btn--sm { min-height: 42px; font-size: 13.5px; padding: 0 15px; border-radius: 9px; }
.btn--block { width: 100%; }

.btn--primary .btn__tag,
.btn--ghost .btn__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

/* ==========================================================================
   Hero (landing)
   ========================================================================== */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 6vw, 92px) clamp(40px, 5vw, 76px);
}
.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 72px);
  align-items: start;
}
@media (min-width: 1000px) {
  .hero__grid { grid-template-columns: 1.45fr 1fr; }
}

.hero__text {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 2.4vw, 30px);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  flex: 0 0 auto;
  background: var(--blue);
}
.eyebrow span {
  font-family: var(--font-mono);
  font-size: clamp(10.5px, 1vw, 12px);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6E9BD6;
}

.hero__name {
  font-size: clamp(42px, 7.4vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.hero__creds {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  max-width: 640px;
  font-family: var(--font-mono);
  font-size: clamp(13.5px, 1.2vw, 17px);
  line-height: 1.5;
  color: #9FB3CE;
}
.hero__creds-dot {
  width: 4px; height: 4px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--blue);
}
@media (max-width: 599px) {
  .hero__creds { flex-direction: column; align-items: flex-start; gap: 6px; }
  .hero__creds-dot { display: none; }
}

.hero__lede {
  max-width: 620px;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.55;
  color: var(--text-body);
}
.hero__lede strong { color: var(--text); font-weight: 500; }
.hero__lede .metric { color: var(--mint); font-weight: 500; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 599px) {
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; min-height: 54px; font-size: 16px; }
}

.hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
}
.hero__links a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14.5px;
  color: var(--text-dim);
}
.hero__links a:hover { color: var(--blue-bright); }

.hero__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.portrait {
  position: relative;
  aspect-ratio: 4 / 5;
  max-height: 452px;
  overflow: hidden;
  border: 1px solid rgba(140, 170, 215, 0.20);
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface-3) 0%, #0A1220 100%);
}
.portrait img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 22%;
}
.portrait__empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 20px;
}
.portrait__empty span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--text-ghost);
}
.portrait__empty small { font-size: 12.5px; color: var(--text-quiet); }

.status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border: 1px solid var(--mint-line);
  border-radius: var(--r-md);
  background: rgba(70, 214, 168, 0.06);
  font-size: 13.5px;
  color: #A9C9BE;
}
.status::before {
  content: "";
  width: 7px; height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(70, 214, 168, 0.16);
}

/* ==========================================================================
   Proof strip
   ========================================================================== */

.proof {
  border-block: 1px solid var(--line-soft);
  background: var(--bg);
}
.proof__grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
}
@media (min-width: 800px) {
  .proof__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.proof__item {
  background: var(--bg);
  padding: 18px var(--gutter);
}
@media (min-width: 800px) {
  .proof__item {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 34px 48px;
  }
  .proof__item:first-child { padding-left: var(--gutter); }
}
@media (max-width: 799px) {
  .proof__item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
  }
}
.proof__value {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  white-space: nowrap;
}
.proof__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-faint);
}
@media (min-width: 800px) { .proof__label { font-size: 11.5px; } }

/* ==========================================================================
   Sections
   ========================================================================== */

.section { position: relative; padding-block: var(--section); }
.section--flush-top { padding-top: 0; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 28px;
}
.section__head-text { display: flex; flex-direction: column; gap: 14px; }
.section__title {
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: -0.025em;
}
.section__more {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
}

/* about */
.about {
  display: grid;
  gap: clamp(24px, 4vw, 72px);
}
@media (min-width: 1000px) {
  .about { grid-template-columns: 0.62fr 1fr; }
}
.about__head { display: flex; flex-direction: column; gap: 18px; }
.about__body { display: flex; flex-direction: column; gap: 24px; }
.about__body p {
  font-size: clamp(16px, 1.3vw, 17.5px);
  line-height: 1.7;
  color: var(--text-body);
}

.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
  padding: 8px 14px;
  border: 1px solid rgba(140, 170, 215, 0.20);
  border-radius: 999px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
}

/* product screenshot band */
.showcase {
  margin: clamp(30px, 4vw, 48px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
}
.showcase img { width: 100%; height: auto; }
.showcase figcaption {
  padding: 14px 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

/* ==========================================================================
   Tiles (projects, posts, links)
   ========================================================================== */

.grid-3 {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
}
@media (min-width: 1050px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.grid-2 {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 820px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
}
.grid-2 .tile { padding: clamp(24px, 2.4vw, 34px); }
.grid-2 .tile__title { font-size: clamp(22px, 2.2vw, 27px); }
.grid-2 .tile__desc { font-size: clamp(15px, 1.4vw, 16.5px); }

.tile {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(22px, 2vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
              background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.tile:hover,
.tile:focus-within {
  transform: translateY(-3px);
  border-color: rgba(76, 154, 255, 0.55);
  background: var(--surface-3);
  box-shadow: var(--shadow-tile);
}

.tile__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.tile__kicker {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.tile__title {
  font-size: clamp(20px, 1.8vw, 23px);
  line-height: 1.22;
  letter-spacing: -0.022em;
}
.tile__title a { color: inherit; }
.tile:hover .tile__title a { color: var(--blue-bright); }
.tile__desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}
.tile__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}
@media (max-width: 480px) {
  .tile__foot .btn { flex: 1 1 auto; }
}

.badge {
  flex: 0 0 auto;
  padding: 4px 9px;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
}
.badge--live { background: var(--mint-wash); color: var(--mint); }
.badge--writeup { background: rgba(76, 154, 255, 0.14); color: #7FB4FF; }
.badge--latest {
  background: rgba(76, 154, 255, 0.16);
  color: var(--blue-bright);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 5px 10px;
}

.stack-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.stack-tags li {
  padding: 5px 10px;
  border-radius: 5px;
  background: rgba(140, 170, 215, 0.10);
  font-family: var(--font-mono);
  font-size: 11px;
  color: #7F93AF;
}

/* link cards (Elsewhere) */
.link-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--text);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.link-card:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 154, 255, 0.45);
  background: var(--surface-3);
  color: var(--text);
}
.link-card--accent {
  border-color: rgba(76, 154, 255, 0.34);
  background: rgba(47, 124, 224, 0.10);
}
.link-card__icon { color: var(--blue); }
.link-card h3 {
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.015em;
}
.link-card p { font-size: 14.5px; line-height: 1.6; color: var(--text-muted); }

/* ==========================================================================
   Page head (interior pages)
   ========================================================================== */

.page-head {
  position: relative;
  overflow: hidden;
  padding-block: clamp(38px, 5vw, 76px) clamp(28px, 3vw, 44px);
}
.page-head__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}
.page-head__text {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.4vw, 20px);
  max-width: 720px;
}
.page-head h1 {
  font-size: clamp(31px, 4.2vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}
.page-head p {
  font-size: clamp(15.5px, 1.4vw, 17px);
  line-height: 1.65;
  color: var(--text-dim);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border: 1px solid rgba(140, 170, 215, 0.18);
  border-radius: 999px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.pill::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mint);
}

/* ==========================================================================
   Writing page
   ========================================================================== */

.featured {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
  padding: clamp(22px, 2.4vw, 34px);
  border: 1px solid rgba(76, 154, 255, 0.30);
  border-radius: 18px;
  background: linear-gradient(120deg, #0D1B2E 0%, #0A1220 62%);
  color: var(--text);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.featured:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 154, 255, 0.55);
  color: var(--text);
}
@media (min-width: 900px) {
  .featured { grid-template-columns: 1.35fr 1fr; }
}
.featured__text { display: flex; flex-direction: column; gap: 16px; }
.featured__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.featured h2 {
  font-size: clamp(24px, 2.8vw, 34px);
  line-height: 1.16;
}
.featured p {
  max-width: 620px;
  font-size: clamp(15.5px, 1.4vw, 16.5px);
  line-height: 1.68;
  color: #A0B5D1;
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14.5px;
  color: #7FB4FF;
}

.cover {
  display: grid;
  place-items: center;
  gap: 9px;
  min-height: 128px;
  overflow: hidden;
  border: 1px solid rgba(140, 170, 215, 0.18);
  border-radius: 12px;
  background: rgba(7, 13, 24, 0.6);
  text-align: center;
}
.cover--tall { min-height: 228px; }
.cover img { width: 100%; height: 100%; object-fit: cover; }
.cover span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-quiet);
}

/* a real image in a cover slot */
img.cover {
  display: block;
  width: 100%;
  height: auto;
  min-height: 0;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  padding: 0;
}

/* ==========================================================================
   Article (a single blog post)
   ========================================================================== */

.article { position: relative; padding-block: clamp(28px, 4vw, 52px) var(--section); }
.article .wrap { max-width: 860px; }

.article__back {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: clamp(26px, 4vw, 44px);
}
.article__back:hover { color: var(--blue-bright); }

.article__head { display: flex; flex-direction: column; gap: 16px; }
.article__title {
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 20ch;
}
.article__dek {
  font-size: clamp(16.5px, 1.6vw, 19px);
  line-height: 1.6;
  color: var(--text-dim);
  max-width: 60ch;
}

.article__cover {
  width: 100%;
  height: auto;
  margin: clamp(28px, 4vw, 44px) 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
}

.article__body { display: flex; flex-direction: column; gap: 22px; }
.article__body p {
  font-size: clamp(16.5px, 1.5vw, 18.5px);
  line-height: 1.75;
  color: var(--text-body);
  max-width: 68ch;
}

.article__foot {
  margin-top: clamp(38px, 5vw, 56px);
  padding-top: 26px;
  border-top: 1px solid var(--line-soft);
}
.article__next {
  display: block;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.3;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}
.article__next:hover {
  transform: translateY(-2px);
  border-color: rgba(76, 154, 255, 0.45);
  background: var(--surface-3);
  color: var(--text);
}
.article__next .mono { display: block; color: var(--blue); margin-bottom: 8px; }
.article__next svg { color: var(--blue); display: inline; vertical-align: -2px; margin-left: 9px; }

/* ==========================================================================
   CV page
   ========================================================================== */

.cv-sheet {
  margin-top: clamp(22px, 3vw, 34px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
}
.cv-sheet img { width: 100%; height: auto; }

.cv-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}
.cv-cta__status { min-height: 18px; font-size: 11.5px; letter-spacing: 0.08em; color: var(--text-faint); }
.btn--lg { min-height: 56px; padding: 0 28px; font-size: 16.5px; border-radius: 12px; }
.btn--primary .btn__tag { color: rgba(255, 255, 255, 0.72); }

.post-card { gap: 15px; }
.post-card .cover { width: 100%; }
.post-card__title {
  font-size: 20px;
  line-height: 1.28;
  letter-spacing: -0.02em;
}
.post-card__desc {
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--text-muted);
}
.post-card .read-more {
  margin-top: auto;
  padding-top: 14px;
  font-size: 13.5px;
}

/* ==========================================================================
   L2 project modal
   ========================================================================== */

.modal {
  width: min(968px, calc(100vw - 2 * clamp(12px, 4vw, 48px)));
  max-height: min(900px, calc(100vh - 2 * clamp(12px, 4vw, 48px)));
  padding: 0;
  border: 1px solid rgba(140, 170, 215, 0.20);
  border-radius: var(--r-xl);
  background: #0A121F;
  box-shadow: var(--shadow-modal);
  color: var(--text-body);
  overflow: hidden;
}
.modal::backdrop {
  background: rgba(3, 7, 14, 0.76);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.modal[open] { display: flex; flex-direction: column; }

.modal__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(20px, 2.4vw, 30px) clamp(20px, 2.6vw, 34px) clamp(18px, 2vw, 24px);
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.modal__heading { display: flex; flex-direction: column; gap: 12px; }
.modal__kickers {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.modal__kickers .mono { font-size: 11px; }
.modal__kickers .dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: #3E5878;
}
.modal__title {
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.modal__lede {
  max-width: 640px;
  font-size: clamp(15px, 1.3vw, 16px);
  line-height: 1.6;
  color: var(--text-muted);
}

.modal__close {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  flex: 0 0 auto;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: rgba(7, 13, 24, 0.8);
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.modal__close:hover { color: var(--text); border-color: var(--blue-line); }

.modal__body {
  flex: 1 1 auto;
  overflow-y: auto;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 26px clamp(20px, 2.6vw, 34px) 34px;
  scrollbar-width: thin;
  scrollbar-color: rgba(140, 170, 215, 0.26) transparent;
}
/* a scrolling flex column shrinks its children by default — it must not */
.modal__body > * { flex-shrink: 0; }

.modal__body::-webkit-scrollbar { width: 8px; }
.modal__body::-webkit-scrollbar-thumb {
  border-radius: 4px;
  background: rgba(140, 170, 215, 0.26);
}

.meta-row {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
}
@media (min-width: 700px) {
  .meta-row { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.meta-row div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 18px;
  background: var(--surface);
}
.meta-row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.meta-row dd {
  margin: 0;
  font-size: 14px;
  color: #E2EAF5;
}

.shot {
  display: grid;
  place-items: center;
  gap: 10px;
  min-height: 180px;
  overflow: hidden;
  border: 1px solid rgba(140, 170, 215, 0.18);
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface-3) 0%, #0A1220 100%);
  text-align: center;
  padding: 16px;
}
.shot img {
  width: auto;
  max-width: 100%;
  max-height: 300px;
  object-fit: contain;
  border-radius: 8px;
}
.shot span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--text-ghost);
}
.shot small { font-size: 12.5px; color: var(--text-quiet); }

.detail-block {
  display: grid;
  gap: 12px;
}
@media (min-width: 760px) {
  .detail-block { grid-template-columns: 168px 1fr; gap: 28px; }
}
.detail-block > h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  padding-top: 4px;
}
.detail-block p {
  font-size: clamp(15px, 1.3vw, 16px);
  line-height: 1.72;
  color: var(--text-body);
}
.detail-block ol {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.detail-block ol li {
  display: flex;
  gap: 14px;
  counter-increment: step;
}
.detail-block ol li::before {
  content: "0" counter(step);
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mint);
  padding-top: 4px;
}

.modal__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px clamp(20px, 2.6vw, 34px);
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}
.modal__footer-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.modal__next {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-dim);
}
.modal__next:hover { color: var(--blue-bright); }

body.is-locked { overflow: hidden; }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--bg-deep);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap-reverse;
  align-items: center;
  justify-content: space-between;
  gap: 14px 26px;
  padding-block: 30px;
}
.site-footer__credit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-ghost);
}
.site-footer__links { display: flex; flex-wrap: wrap; gap: 22px; }
.site-footer__links a { font-size: 13.5px; color: var(--text-dim); }
.site-footer__links a:hover { color: var(--blue-bright); }

/* ==========================================================================
   Motion
   ========================================================================== */

/* content is visible by default; only the JS build hides it to animate in,
   so a failed script never leaves a blank page */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .btn:hover, .tile:hover, .link-card:hover, .featured:hover { transform: none; }
}

@media print {
  .site-header, .site-footer, .glow, .modal { display: none !important; }
  body { background: #fff; color: #111; }
}

/* ==========================================================================
   Article — rich content written in markdown
   ========================================================================== */

.article__meta { color: var(--text-faint); }
.article__meta:empty { display: none; }

.article__body > * { max-width: 68ch; }
.article__body h2,
.article__body h3 { margin-top: 18px; scroll-margin-top: 96px; }
.article__body h2 { font-size: clamp(23px, 2.6vw, 29px); }
.article__body h3 { font-size: clamp(19px, 2vw, 22px); }
.article__body li,
.article__body blockquote p {
  font-size: clamp(16.5px, 1.5vw, 18.5px);
  line-height: 1.7;
  color: var(--text-body);
}
.article__body ul,
.article__body ol {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 24px;
}
.article__body ul { list-style: disc; }
.article__body ol { list-style: decimal; }
.article__body li::marker { color: var(--blue); }
.article__body li > ul,
.article__body li > ol { margin-top: 10px; }
.article__body strong { color: var(--text); font-weight: 600; }
.article__body a {
  text-decoration: underline;
  text-decoration-color: var(--blue-line);
  text-underline-offset: 3px;
}
.article__body blockquote {
  margin: 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--blue);
}
.article__body code {
  padding: 2px 6px;
  border-radius: 5px;
  background: var(--surface-3);
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--blue-ink);
}
.article__body pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
}
.article__body pre code { padding: 0; background: none; }
.article__body img {
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.article__body hr { width: 100%; border: 0; border-top: 1px solid var(--line-soft); }
.article__body .table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.article__body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.5;
}
.article__body th,
.article__body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}
.article__body th {
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}
.article__body tr:last-child td { border-bottom: 0; }
.article__body .footnote { font-size: 14.5px; color: var(--text-muted); }
.article__body .footnote p,
.article__body .footnote li { font-size: 14.5px; line-height: 1.6; color: var(--text-muted); }
.article__body sup { line-height: 0; }

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