/* ============================================================
   Field Notebook - Atish Ojha
   Warm paper, ink serif, contour lines, a trail down the margin.
   ============================================================ */

/* ---- tokens ------------------------------------------------ */

:root {
  --paper:    #F3EBDC;
  --paper-2:  #EDE3D1;
  --ink:      #1F1C18;
  --faded:    #5F594C;
  --forest:   #3E5641;
  --clay:     #9C4F2A;
  --brass:    #C49A4A;  /* decorative only - fails contrast as text on paper */
  --focus:    #96701F;
  --rule:     rgba(31, 28, 24, 0.14);
  --shadow:   0 1px 2px rgba(31,28,24,.06), 0 10px 28px rgba(31,28,24,.07);
  --grain-opacity: .32;

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body:    'Karla', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --measure:   68ch;
  --rail:      clamp(28px, 5vw, 76px);
  --section-y: clamp(4.5rem, 10vw, 9rem);
  --gap:       clamp(1rem, 2.5vw, 2rem);
}

[data-theme="night"] {
  --paper:    #14120F;
  --paper-2:  #1D1A16;
  --ink:      #EDE3D1;
  --faded:    #928779;
  --forest:   #7E9481;
  --clay:     #D98E4A;
  --brass:    #C49A4A;
  --focus:    #C49A4A;
  --rule:     rgba(237, 227, 209, 0.16);
  --shadow:   0 1px 2px rgba(0,0,0,.45), 0 10px 28px rgba(0,0,0,.38);
  --grain-opacity: .20;
}

/* ---- reset and base ---------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  font-weight: 400;
  overflow-x: hidden;
  transition: background-color .4s ease, color .4s ease;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 .5em;
  font-variation-settings: 'SOFT' 40, 'WONK' 1;
}

h1 { font-size: clamp(2.75rem, 1.6rem + 5.4vw, 6rem); }
h2 { font-size: clamp(1.9rem, 1.4rem + 2.2vw, 3.1rem); }
h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem); letter-spacing: -0.01em; }

p { margin: 0 0 1.1em; max-width: var(--measure); }

a { color: var(--forest); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { color: var(--clay); }

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

/* ---- layout utilities -------------------------------------- */

.wrap {
  width: min(100% - 2.5rem, 1120px);
  margin-inline: auto;
  padding-left: var(--rail);
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--faded);
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1.4rem;
}

/* the waypoint dot that sits on each section header */
.eyebrow::before {
  content: "";
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--brass);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brass) 22%, transparent);
  flex: none;
}

.lede {
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.28rem);
  color: var(--faded);
  max-width: 56ch;
}

.card {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  box-shadow: var(--shadow);
}

/* ---- texture ------------------------------------------------ */

.texture-contours {
  position: fixed;
  inset: -10vh 0 -10vh 0;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  color: var(--forest);
  will-change: transform;
}
.texture-contours svg { width: 100%; height: 100%; display: block; }
.texture-contours path { fill: none; stroke: currentColor; stroke-width: 1; opacity: .13; }

.texture-grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.34'/%3E%3C/svg%3E");
}
[data-theme="night"] .texture-grain { mix-blend-mode: screen; opacity: .12; }

/* Coffee rings. A real one is thin, uneven, and darker where the cup sat
   longest - so: a squashed ellipse, rotated, with a heavier arc on one side. */
.stain {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  aspect-ratio: 1;
  opacity: .72;
  background:
    radial-gradient(closest-side ellipse at 50% 50%,
      transparent 0 87%,
      color-mix(in srgb, var(--clay) 15%, transparent) 88% 93%,
      color-mix(in srgb, var(--clay) 5%, transparent) 93% 97%,
      transparent 98%),
    radial-gradient(closest-side ellipse at 62% 66%,
      transparent 0 89%,
      color-mix(in srgb, var(--clay) 9%, transparent) 90% 95%,
      transparent 96%);
}
[data-theme="night"] .stain { opacity: .5; }

.page { position: relative; z-index: 2; }

/* ---- reveal contract ---------------------------------------- */
/* Visible by default. Only JS + a motion-tolerant user hides it. */

[data-reveal] { opacity: 1; transform: none; }

@media (prefers-reduced-motion: no-preference) {
  .js [data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .7s ease, transform .7s cubic-bezier(.22,.61,.36,1);
  }
  .js [data-reveal].is-revealed { opacity: 1; transform: none; }
}

/* ---- skip link ---------------------------------------------- */

.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper);
  padding: .6rem 1rem; font-family: var(--font-mono); font-size: .8rem;
}
.skip:focus { left: 0; }

/* ---- trail rail --------------------------------------------- */

.trail {
  position: fixed;
  left: clamp(10px, 2vw, 30px);
  top: 0;
  width: 24px;
  height: 100vh;
  z-index: 3;
  pointer-events: none;
}
.trail path { fill: none; stroke-linecap: round; }
.trail__base   { stroke: var(--rule); stroke-width: 1.5; stroke-dasharray: 5 7; }
.trail__walked { stroke: var(--brass); stroke-width: 1.75; stroke-dasharray: 1; stroke-dashoffset: 1; }

/* ---- nav ----------------------------------------------------- */

.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(9px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.nav.is-stuck { border-bottom-color: var(--rule); }
.nav__inner {
  display: flex; align-items: center; gap: var(--gap);
  min-height: 68px;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.06rem; letter-spacing: .01em;
  color: var(--ink); text-decoration: none; font-weight: 600;
}
.nav__links { display: flex; gap: 1.5rem; margin-left: auto; }
.nav__links a {
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--faded); text-decoration: none;
}
.nav__links a:hover { color: var(--ink); }
.nav__tools { display: flex; align-items: center; gap: .6rem; margin-left: var(--gap); }

/* ---- buttons -------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .06em;
  padding: .62rem 1.05rem; border-radius: 2px; cursor: pointer;
  text-decoration: none; border: 1px solid var(--rule);
  background: transparent; color: var(--ink);
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--ink); }
.btn--solid { background: var(--forest); border-color: var(--forest); color: var(--paper); }
.btn--solid:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn--quiet { border-color: transparent; color: var(--faded); padding-inline: .5rem; }
.btn--quiet:hover { color: var(--ink); }
.btn__key {
  font-size: .72rem; line-height: 1;
  border: 1px solid var(--rule); border-radius: 2px;
  padding: .16rem .34rem; color: var(--faded);
}
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid var(--rule); border-radius: 50%;
  background: transparent; color: var(--ink); cursor: pointer; font-size: 1rem;
  transition: border-color .2s ease, transform .3s ease;
  flex: none;
}
.icon-btn:hover { border-color: var(--ink); transform: rotate(-14deg); }

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

.hero { padding-block: clamp(4rem, 11vw, 9rem) clamp(3rem, 8vw, 6rem); position: relative; }
.stain--hero {
  width: clamp(120px, 17vw, 215px);
  right: 7%; top: 16%;
  transform: rotate(-13deg) scaleY(.9);
}
.hero__kicker {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--faded); margin-bottom: 1.4rem;
}
.hero__name { margin-bottom: .1em; }
.hero__role {
  font-family: var(--font-mono); font-size: clamp(.85rem, .8rem + .3vw, 1rem);
  letter-spacing: .2em; text-transform: uppercase; color: var(--clay);
  margin-bottom: 2rem;
}
.hero__blurb { margin-bottom: 1rem; }
.hero__aside {
  font-family: var(--font-display); font-style: italic;
  font-size: clamp(1rem, .95rem + .3vw, 1.15rem);
  color: var(--faded); max-width: 46ch; margin-bottom: 2.4rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: .7rem; align-items: center; }

/* ---- stats ---------------------------------------------------- */

.stats {
  display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 2.6rem 0 3.4rem;
}
.stat { background: var(--paper); padding: 1.1rem 1.2rem; }
.stat b {
  display: block; font-family: var(--font-display); font-weight: 500;
  font-size: clamp(1.7rem, 1.4rem + 1.4vw, 2.4rem); line-height: 1;
  color: var(--clay); margin-bottom: .3rem;
}
.stat span { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .07em; color: var(--faded); }

/* ---- timeline ------------------------------------------------- */

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline__item {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: clamp(1rem, 3vw, 2.6rem);
  padding: 2.2rem 0;
  border-top: 1px solid var(--rule);
  position: relative;
}
.timeline__item::before {
  content: ""; position: absolute; left: -1px; top: -5px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--paper); border: 1.5px solid var(--brass);
}
.timeline__when {
  font-family: var(--font-mono); font-size: .76rem; letter-spacing: .06em;
  color: var(--faded); padding-top: .45rem;
}
.timeline__org {
  font-family: var(--font-mono); font-size: .78rem; color: var(--clay);
  letter-spacing: .04em; margin-bottom: 1rem;
}
.timeline__what ul { margin: 0; padding-left: 1.1rem; }
.timeline__what li { margin-bottom: .5rem; max-width: var(--measure); }
.timeline__what li::marker { color: var(--brass); }

/* ---- toolkit -------------------------------------------------- */

.stain--kit {
  width: clamp(100px, 13vw, 165px);
  left: 62%; bottom: 6%;
  transform: rotate(9deg) scaleY(.93);
}
.kit {
  display: grid; gap: 2rem clamp(1.5rem, 4vw, 3.5rem);
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  margin-top: 2.6rem;
}
.kit__group h3 {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase; color: var(--faded);
  padding-bottom: .6rem; margin-bottom: .9rem; border-bottom: 1px solid var(--rule);
}
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.tags li {
  font-family: var(--font-mono); font-size: .76rem;
  border: 1px solid var(--rule); border-radius: 2px;
  padding: .26rem .6rem; color: var(--ink);
  background: color-mix(in srgb, var(--paper-2) 70%, transparent);
}
.tags--sm li { font-size: .68rem; padding: .18rem .45rem; color: var(--faded); }

/* ---- credentials ---------------------------------------------- */

.creds {
  display: grid; gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  margin-top: 3.4rem;
}
.cred__label {
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--clay); margin-bottom: .8rem;
}
.cred h3 { font-size: 1.12rem; margin-bottom: .3rem; }
.cred__second { margin-top: 1rem; }
.cred__meta { font-size: .9rem; color: var(--faded); margin: 0; }
.cred__link {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .04em;
  color: var(--forest); white-space: nowrap;
}

/* ---- projects -------------------------------------------------- */

.group-label {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase; color: var(--faded);
  margin: 2.8rem 0 1.2rem;
}
.grid {
  display: grid; gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
}
.proj {
  display: flex; flex-direction: column; gap: .55rem;
  text-decoration: none; color: inherit;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
a.proj:hover { transform: translateY(-3px); border-color: var(--brass); }
.proj h3 { margin: 0; }
.proj p { font-size: .93rem; color: var(--faded); margin: 0; }
.proj .tags { margin-top: .3rem; }
.proj__go {
  margin-top: auto; padding-top: .8rem;
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .06em; color: var(--forest);
}
.proj__go--muted { color: var(--faded); }
.proj--closed { border-style: dashed; }

/* ---- scroll lock (used by the terminal overlay) -------------------- */

body.is-locked { overflow: hidden; }

/* ---- off the clock ------------------------------------------------ */

.section--tinted { background: color-mix(in srgb, var(--paper-2) 60%, transparent); }
.stain--off {
  width: clamp(105px, 14vw, 180px);
  right: 9%; top: 16%;
  transform: rotate(-6deg) scaleY(.92);
}
.grid--four { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); margin-top: 2.6rem; }
.hobby__art { width: 46px; height: 46px; color: var(--clay); margin-bottom: 1rem; display: block; }
.hobby h3 { font-size: 1.2rem; margin-bottom: .45rem; }
.hobby p { font-size: .93rem; color: var(--faded); margin: 0; }

/* ---- postcard ------------------------------------------------------ */

.postcard {
  display: grid; gap: clamp(1.5rem, 4vw, 3.5rem);
  grid-template-columns: 1.1fr 1fr;
  padding: clamp(1.6rem, 4vw, 3rem);
  margin-top: 1.5rem;
  position: relative;
}
.postcard::after {
  content: ""; position: absolute; inset: 8px;
  border: 1px dashed var(--rule); pointer-events: none;
}
.postcard__left h2 { margin-bottom: .5rem; }
.postcard__left p { color: var(--faded); margin-bottom: 1.6rem; }
.postcard__right { display: flex; flex-direction: column; gap: 1.4rem; }
.postcard__stamp {
  align-self: flex-end;
  width: 74px; height: 88px;
  border: 2px dashed var(--brass); border-radius: 2px;
  display: grid; place-content: center; text-align: center;
  font-family: var(--font-mono); color: var(--clay);
  transform: rotate(4deg);
}
.postcard__stamp span { font-size: 1.05rem; letter-spacing: .08em; display: block; }
.postcard__stamp small { font-size: .6rem; color: var(--faded); }
.postcard__lines { list-style: none; margin: 0; padding: 0; }
.postcard__lines li {
  display: flex; gap: .9rem; align-items: baseline;
  padding: .6rem 0; border-bottom: 1px solid var(--rule);
  font-size: .92rem;
}
.postcard__lines span {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--faded); min-width: 74px;
}

/* ---- footer --------------------------------------------------------- */

.foot { border-top: 1px solid var(--rule); padding-block: 2rem 2.6rem; }
.foot__inner {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: .74rem; color: var(--faded);
}
.foot kbd {
  font-family: var(--font-mono); border: 1px solid var(--rule);
  border-radius: 2px; padding: .1rem .32rem; font-size: .72rem;
}

/* ---- terminal overlay ------------------------------------------------ */

.term { position: fixed; inset: 0; z-index: 80; display: grid; place-items: end center; }
.term[hidden] { display: none; }
.term__scrim {
  position: absolute; inset: 0;
  background: rgba(20,18,15,.62); backdrop-filter: blur(4px);
  opacity: 0; transition: opacity .35s ease;
}
.term.is-open .term__scrim { opacity: 1; }
.term__window {
  position: relative;
  width: min(100%, 1060px);
  height: min(88vh, 760px);
  margin: 0 auto;
  background: #000;
  border: 1px solid var(--brass);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  box-shadow: 0 -20px 70px rgba(0,0,0,.5);
  display: flex; flex-direction: column; overflow: hidden;
  transform: translateY(100%);
}
@media (prefers-reduced-motion: no-preference) {
  .term__window { transition: transform .42s cubic-bezier(.22,.61,.36,1); }
}
.term.is-open .term__window { transform: translateY(0); }
.term__bar {
  display: flex; align-items: center; gap: .8rem;
  padding: .6rem .9rem;
  background: #14120F; border-bottom: 1px solid rgba(196,154,74,.35);
  font-family: var(--font-mono); font-size: .74rem; color: #928779;
}
.term__dots { display: flex; gap: .35rem; }
.term__dots i { width: 9px; height: 9px; border-radius: 50%; background: #3a352c; }
.term__title { letter-spacing: .06em; }
.term__close {
  margin-left: auto; background: transparent;
  border: 1px solid rgba(196,154,74,.35); border-radius: 2px;
  color: #C49A4A; cursor: pointer;
  font-family: var(--font-mono); font-size: .72rem; padding: .28rem .6rem;
}
.term__close:hover { background: rgba(196,154,74,.14); }
.term__close kbd { font: inherit; opacity: .75; }
.term__body { flex: 1; min-height: 0; }
.term__frame { width: 100%; height: 100%; border: 0; display: block; background: #000; }
.term__fallback { color: #EDE3D1; font-family: var(--font-mono); font-size: .85rem; padding: 2rem; }
.term__fallback a { color: #C49A4A; }

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

@media (max-width: 900px) {
  .postcard { grid-template-columns: 1fr; }
  .postcard__stamp { align-self: flex-start; }
  .timeline__item { grid-template-columns: 1fr; gap: .8rem; }
  .timeline__when { padding-top: 0; }
}

@media (max-width: 720px) {
  :root { --rail: 26px; }
  .nav__links { display: none; }
  .nav__tools { margin-left: auto; }
  .trail { left: 6px; width: 16px; }
  .hero__actions { gap: .5rem; }
  .btn { padding: .55rem .8rem; font-size: .75rem; }
  .term { place-items: stretch; }
  .term__window { height: 100dvh; border-radius: 0; border: none; }
}

/* no keyboard: drop the backtick affordances */
@media (hover: none) and (pointer: coarse) {
  .btn__key { display: none; }
  .foot__hint { display: none; }
}

/* ---- open-source call-out ---------------------------------------------- */

.repo-cta {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.2rem);
  text-decoration: none;
  color: inherit;
  margin-bottom: .5rem;
  transition: transform .25s ease, border-color .25s ease;
}
.repo-cta:hover { transform: translateY(-3px); border-color: var(--brass); }
.repo-cta__art { width: 44px; height: 44px; color: var(--clay); flex: none; }
.repo-cta__text h3 { margin: 0 0 .3rem; }
.repo-cta__text p { margin: 0; font-size: .93rem; color: var(--faded); }
.repo-cta__go {
  font-family: var(--font-mono); font-size: .76rem; letter-spacing: .04em;
  color: var(--forest); white-space: nowrap;
}

@media (max-width: 720px) {
  .repo-cta { grid-template-columns: 1fr; gap: .9rem; }
  .repo-cta__go { white-space: normal; }
}