/* ==========================================================================
   Dr. Richard Saldanha — personal site
   Clinical precision: crisp white, near-black ink, one arterial crimson.
   Archivo (expanded) for display, STIX Two Text — the typeface of
   scientific publishing — for prose, Fragment Mono for annotation.
   The hero sits on a whisper-faint ECG graph-paper grid.
   ========================================================================== */

:root {
  --bg: #fcfcfa;
  --ink: #14161a;
  --ink-soft: #4c5157;
  --crimson: #9e1b2e;
  --crimson-deep: #821526;
  --rule: rgba(20, 22, 26, 0.16);
  --rule-faint: rgba(20, 22, 26, 0.09);
  --grid-line: rgba(158, 27, 46, 0.04);
  --grid-line-major: rgba(158, 27, 46, 0.075);
  --white-on-ink: #f4f4f2;
  --display: "Archivo", "Helvetica Neue", sans-serif;
  --body: "STIX Two Text", "Georgia", serif;
  --mono: "Fragment Mono", "Courier New", monospace;
  --measure: 64ch;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(1.06rem, 0.95rem + 0.3vw, 1.16rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--crimson); color: #fff; }

a { color: inherit; }

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

.footer :focus-visible,
.stats :focus-visible {
  outline-color: #d4737f;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 40;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.5rem;
}

/* ==========================================================================
   Masthead
   ========================================================================== */

.masthead {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem var(--gutter);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-faint);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 600;
  font-stretch: 110%;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pulse-mark {
  width: 2rem;
  height: auto;
  color: var(--crimson);
  flex: none;
}

.masthead-nav {
  display: flex;
  gap: clamp(0.9rem, 2.5vw, 2rem);
}

.masthead-nav a {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.masthead-nav a:hover {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}

/* ==========================================================================
   Hero — set on faint ECG graph paper
   ========================================================================== */

.hero {
  padding: clamp(3rem, 8vh, 6rem) var(--gutter) 0;
  background:
    radial-gradient(circle at 100% 0%, transparent 12%, var(--bg) 46%),
    linear-gradient(var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:
    100% 100%,
    45px 45px,
    45px 45px,
    9px 9px,
    9px 9px;
  border-bottom: 1px solid var(--rule-faint);
}

.hero-inner {
  max-width: 74rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--crimson);
  line-height: 2;
}

.hero-text .kicker { margin-bottom: clamp(1.75rem, 4vh, 3rem); }

.hero-name {
  font-family: var(--display);
  font-weight: 640;
  font-stretch: 122%;
  text-transform: uppercase;
  font-size: clamp(2.6rem, 7.2vw, 5.9rem);
  line-height: 0.96;
  letter-spacing: -0.012em;
}

.hero-name-line { display: block; }

.hero-role {
  margin-top: clamp(1.5rem, 3.5vh, 2.25rem);
  font-family: var(--display);
  font-weight: 600;
  font-stretch: 108%;
  font-size: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
  line-height: 1.35;
}

.hero-role-org {
  color: var(--crimson);
  text-decoration: underline;
  text-decoration-color: rgba(158, 27, 46, 0.35);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

.hero-role-org:hover { text-decoration-color: var(--crimson); }

.hero-dek {
  margin-top: clamp(1rem, 2.5vh, 1.6rem);
  font-size: clamp(1.2rem, 1rem + 0.7vw, 1.5rem);
  font-style: italic;
  color: var(--ink-soft);
  max-width: 36ch;
  line-height: 1.55;
  text-wrap: pretty;
}

/* Portrait */

.hero-portrait {
  position: relative;
  width: 100%;
  max-width: min(100%, 22rem);
  justify-self: end;
}

.hero-portrait img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: #eef0ec;
}

.hero-portrait::after {
  content: "";
  position: absolute;
  inset: 0.8rem -0.8rem auto 0.8rem;
  height: calc(100% - 0.8rem + 0.8rem);
  border: 1px solid var(--crimson);
  opacity: 0.4;
  z-index: -1;
  pointer-events: none;
}

.portrait-caption {
  margin-top: 0.85rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ECG trace */

.ecg-band {
  max-width: 78rem;
  margin: clamp(2rem, 6vh, 4rem) auto 0;
  color: var(--crimson);
}

.ecg { display: block; width: 100%; height: auto; }

.ecg-path {
  stroke-dasharray: 1600;
  stroke-dashoffset: 1600;
  animation: ecg-draw 2.6s cubic-bezier(0.45, 0, 0.2, 1) 0.35s forwards;
}

@keyframes ecg-draw {
  to { stroke-dashoffset: 0; }
}

/* ==========================================================================
   Stats — the one dark moment
   ========================================================================== */

.stats {
  background: var(--ink);
  color: var(--white-on-ink);
  padding: clamp(3.5rem, 9vh, 6rem) var(--gutter);
}

.stats-grid {
  max-width: 74rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.stat {
  border-top: 1px solid rgba(244, 244, 242, 0.28);
  padding-top: 1.4rem;
}

.stat-num {
  display: block;
  font-family: var(--display);
  font-weight: 560;
  font-stretch: 116%;
  font-size: clamp(2.5rem, 5.2vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.015em;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(244, 244, 242, 0.62);
  line-height: 1.8;
}

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

.section {
  padding: clamp(4rem, 11vh, 7.5rem) var(--gutter) 0;
  max-width: 74rem;
  margin: 0 auto;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1.1rem;
  margin-bottom: clamp(2.25rem, 6vh, 3.75rem);
}

.section-index {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--crimson);
}

.section-head h2 {
  font-family: var(--display);
  font-weight: 620;
  font-stretch: 116%;
  text-transform: uppercase;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: 0.005em;
}

/* Career prose */

.prose { max-width: var(--measure); }

.prose p + p { margin-top: 1.6em; }

.has-dropcap::first-letter {
  font-family: var(--display);
  font-weight: 620;
  font-stretch: 116%;
  font-size: 3.9em;
  line-height: 0.8;
  float: left;
  padding: 0.1em 0.14em 0 0;
  color: var(--crimson);
}

/* Feature band */

.feature-band {
  margin-top: clamp(4rem, 11vh, 7.5rem);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: clamp(3rem, 9vh, 5.5rem) var(--gutter);
}

.feature-inner {
  max-width: 74rem;
  margin: 0 auto;
}

.feature-line {
  font-family: var(--display);
  font-weight: 600;
  font-stretch: 118%;
  font-size: clamp(1.6rem, 3.6vw, 2.9rem);
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--crimson-deep);
  max-width: 24em;
  text-wrap: balance;
}

.feature-line em {
  font-style: normal;
  border-bottom: 3px solid currentColor;
}

.feature-note {
  margin-top: 1.4rem;
  font-family: var(--body);
  font-style: italic;
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 58ch;
}

/* Section intro (plain-language lead-in) */

.section-intro {
  max-width: var(--measure);
  color: var(--ink-soft);
  margin: -0.75rem 0 clamp(2rem, 5vh, 3rem);
}

/* Expertise */

.expertise-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.25rem) clamp(2.5rem, 5vw, 5rem);
}

.expertise-item {
  border-top: 1px solid var(--rule);
  padding-top: 1.3rem;
}

.expertise-item h3 {
  font-family: var(--display);
  font-weight: 600;
  font-stretch: 112%;
  font-size: 1.12rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.expertise-item p {
  color: var(--ink-soft);
  font-size: 1rem;
  max-width: 46ch;
}

/* Timeline */

.timeline {
  list-style: none;
  position: relative;
  max-width: 60rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.4rem;
  left: clamp(5.6rem, 12vw, 7.4rem);
  width: 1px;
  background: var(--rule);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: clamp(4.6rem, 10vw, 6.2rem) minmax(0, 1fr);
  gap: clamp(1.8rem, 4vw, 3rem);
  padding: 0 0 clamp(2.2rem, 5vh, 3rem) 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 0.6rem;
  left: clamp(5.6rem, 12vw, 7.4rem);
  width: 7px;
  height: 7px;
  transform: translateX(-3.5px);
  border-radius: 50%;
  background: var(--crimson);
}

.tl-year {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--crimson);
  padding-top: 0.4rem;
  text-align: right;
  white-space: nowrap;
}

.tl-body { padding-left: clamp(0.5rem, 2vw, 1.5rem); }

.tl-body h3 {
  font-family: var(--display);
  font-weight: 600;
  font-stretch: 112%;
  font-size: 1.12rem;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.tl-body p {
  margin-top: 0.5rem;
  color: var(--ink-soft);
  font-size: 1rem;
  max-width: 58ch;
}

/* Scholarship */

.scholarship-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
}

.prose-lead {
  font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.45rem);
  font-style: italic;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: clamp(2rem, 5vh, 3rem);
  text-wrap: pretty;
}

.sub-head {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--crimson);
  margin-bottom: 1rem;
}

.pub-list { list-style: none; }

.pub-list li {
  border-top: 1px solid var(--rule-faint);
  padding: 0.9rem 0;
  font-size: 1rem;
  line-height: 1.6;
}

.pub-list li:last-child { border-bottom: 1px solid var(--rule-faint); }

.pub-year {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--crimson);
  margin-right: 0.7rem;
}

.pub-list em { color: var(--ink-soft); }

.pub-list a {
  text-decoration-color: rgba(158, 27, 46, 0.4);
  text-underline-offset: 0.18em;
}

.pub-list a:hover { text-decoration-color: var(--crimson); }

.pub-links {
  margin-top: 1.2rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pub-links a {
  color: var(--crimson);
  text-decoration-color: rgba(158, 27, 46, 0.4);
  text-underline-offset: 0.22em;
}

.scholarship-side {
  border-left: 1px solid var(--rule-faint);
  padding-left: clamp(1.5rem, 3vw, 2.75rem);
}

.side-block + .side-block { margin-top: 2.25rem; }

.side-block p {
  font-size: 0.98rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

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

.footer {
  margin-top: clamp(5rem, 13vh, 8.5rem);
  background: var(--ink);
  color: var(--white-on-ink);
  padding: clamp(4rem, 10vh, 6.5rem) var(--gutter) 2rem;
}

.footer-inner {
  max-width: 74rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 3rem;
}

.footer .kicker { color: #d4737f; margin-bottom: 1.75rem; }

.footer-name {
  font-family: var(--display);
  font-weight: 620;
  font-stretch: 120%;
  text-transform: uppercase;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  line-height: 1.02;
  letter-spacing: -0.005em;
  color: #fff;
}

.footer-role {
  margin-top: 0.8rem;
  font-style: italic;
  color: rgba(244, 244, 242, 0.75);
}

.contact-note {
  margin-top: 1.6rem;
  color: rgba(244, 244, 242, 0.85);
  max-width: 44ch;
}

.contact-note a {
  color: #fff;
  text-decoration-color: #d4737f;
  text-underline-offset: 0.22em;
}

.footer address {
  margin-top: 2rem;
  font-style: normal;
  line-height: 1.85;
  color: rgba(244, 244, 242, 0.8);
}

.footer address a {
  color: #fff;
  text-decoration-color: #d4737f;
  text-underline-offset: 0.22em;
}

.footer address a:hover { text-decoration-thickness: 2px; }

.footer-ecg {
  color: #d4737f;
  flex: none;
}

.footer-ecg svg { width: clamp(6rem, 12vw, 10rem); height: auto; }

.colophon {
  max-width: 74rem;
  margin: clamp(3rem, 8vh, 5rem) auto 0;
  padding-top: 1.4rem;
  border-top: 1px solid rgba(244, 244, 242, 0.2);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(244, 244, 242, 0.55);
}

/* ==========================================================================
   Reveal animation
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; align-items: start; }
  .hero-portrait { max-width: 20rem; justify-self: start; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .scholarship-grid { grid-template-columns: 1fr; }
  .scholarship-side {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--rule-faint);
    padding-top: 2.25rem;
  }
}

@media (max-width: 640px) {
  .masthead { flex-wrap: wrap; row-gap: 0.4rem; }
  .masthead-nav { flex-wrap: wrap; gap: 0.7rem 1.1rem; }
  .masthead-nav a { font-size: 0.62rem; }
  .expertise-list { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.35rem; }
  .timeline-item::before { display: none; }
  .tl-year { text-align: left; padding-top: 0; }
  .tl-body { padding-left: 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .ecg-path { animation: none; stroke-dashoffset: 0; }
}