/* ============================================================
   Harshini Patani — portfolio
   Direction: "annotated spec". Main column + margin notes.
   ============================================================ */

/* Typefaces load from /fonts.css (self-hosted). Link it before this file. */

:root {
  --paper:   #F7F6F3;
  --ink:     #16181D;
  --slate:   #5C6373;
  --rule:    #DFDCD5;
  --signal:  #3B36D8;
  --ochre:   #B4762A;

  --measure: 62ch;
  --gutter:  clamp(20px, 5vw, 64px);

  --display: 'Bricolage Grotesque', 'Helvetica Neue', sans-serif;
  --body:    'Inter Tight', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

::selection { background: var(--signal); color: var(--paper); }

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

/* ---------- structural grid ---------- */

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* main column + annotation margin */
.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
}

.note {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--slate);
  padding-top: 6px;
  border-top: 1px solid var(--rule);
}

.note b {
  display: block;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 3px;
}

/* ---------- top bar ---------- */

.bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}

.bar-in {
  max-width: 1180px;
  margin: 0 auto;
  padding: 13px var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
}

.bar a { text-decoration: none; }

.brand {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 500;
}

.bar nav {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--slate);
}

.bar nav a:hover { color: var(--signal); }

/* ---------- type ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.eyebrow::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.6rem, 6.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  max-width: 20ch;
}

h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 24ch;
}

h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.lede {
  font-size: clamp(1.08rem, 1.9vw, 1.32rem);
  line-height: 1.5;
  color: var(--ink);
  max-width: 46ch;
  margin: 0 0 20px;
}

p { max-width: var(--measure); margin: 0 0 18px; }

.sub { color: var(--slate); }

section { padding: clamp(64px, 10vw, 128px) 0; }

.hr { height: 1px; background: var(--rule); border: 0; margin: 0; }

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

.hero { padding-top: clamp(72px, 14vw, 168px); }

.hero .accent { color: var(--signal); }

/* ---------- work rows ---------- */

.rows { border-top: 1px solid var(--rule); }

.row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) 168px;
  gap: clamp(18px, 4vw, 48px);
  padding: 34px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  align-items: start;
  transition: background 140ms ease, padding 140ms ease;
}

a.row:hover {
  background: color-mix(in srgb, var(--signal) 5%, transparent);
  padding-left: 14px;
  padding-right: 14px;
}

a.row:hover .row-name { color: var(--signal); }

.row-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate);
  padding-top: 7px;
}

.row-name {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 8px;
  transition: color 140ms ease;
}

.row-desc {
  color: var(--slate);
  font-size: 0.97rem;
  max-width: 52ch;
  margin: 0 0 12px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--slate);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 3px 7px;
}

.row-cta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--slate);
  padding-top: 8px;
  text-align: right;
}

.row-cta .lock { color: var(--ochre); }

/* ---------- facts block (case study header) ---------- */

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 24px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  margin: 40px 0 0;
}

.fact-k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 5px;
}

.fact-v { font-size: 0.97rem; font-weight: 500; }

/* ---------- case study body ---------- */

.block { margin-bottom: clamp(48px, 7vw, 88px); }

.callout {
  border-left: 2px solid var(--signal);
  padding: 4px 0 4px 20px;
  margin: 28px 0;
  font-size: 1.06rem;
  line-height: 1.5;
  max-width: 52ch;
}

ul.clean { padding-left: 0; list-style: none; max-width: var(--measure); margin: 0 0 18px; }

ul.clean li {
  padding-left: 26px;
  position: relative;
  margin-bottom: 13px;
}

ul.clean li::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 12px;
  width: 12px;
  height: 1px;
  background: var(--ochre);
}

.decision {
  border-top: 1px solid var(--rule);
  padding: 22px 0 4px;
}

.decision-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ochre);
  margin-bottom: 8px;
}

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

.contact-link {
  font-family: var(--display);
  font-size: clamp(1.5rem, 4.2vw, 2.9rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  text-decoration: none;
  display: inline-block;
  border-bottom: 2px solid var(--rule);
  padding-bottom: 3px;
  transition: color 140ms ease, border-color 140ms ease;
}

.contact-link:hover { color: var(--signal); border-color: var(--signal); }

.elsewhere {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  margin-top: 34px;
  color: var(--slate);
}

.elsewhere a:hover { color: var(--signal); }

footer {
  border-top: 1px solid var(--rule);
  padding: 26px 0 40px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--slate);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.back {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--slate);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 34px;
}

.back:hover { color: var(--signal); }

/* ---------- password gate ---------- */

.gate {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gutter);
}

.gate-card { max-width: 400px; width: 100%; }

.gate h2 { font-size: 1.9rem; margin-bottom: 12px; }

.gate p { font-size: 0.95rem; color: var(--slate); margin-bottom: 24px; }

.gate-row { display: flex; gap: 8px; }

.gate input {
  flex: 1;
  font-family: var(--mono);
  font-size: 14px;
  padding: 11px 13px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
}

.gate input:focus { outline: none; border-color: var(--signal); }

.gate button {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 11px 20px;
  border: 0;
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}

.gate button:hover { background: var(--signal); }

.gate-err {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ochre);
  margin-top: 12px;
  min-height: 16px;
}

body.locked { overflow: hidden; }

/* ---------- reveal ---------- */

.rise {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 620ms cubic-bezier(.2,.7,.3,1), transform 620ms cubic-bezier(.2,.7,.3,1);
}

.rise.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .rise { opacity: 1; transform: none; transition: none; }
  * { scroll-behavior: auto !important; }
}

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

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; gap: 26px; }
  .note { border-top: 1px solid var(--rule); max-width: 42ch; }
  .row { grid-template-columns: 1fr; gap: 12px; padding: 28px 0; }
  .row-meta { padding-top: 0; }
  .row-cta { text-align: left; padding-top: 0; }
  .bar nav { gap: 16px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .bar nav a.hide-sm { display: none; }
}