/* =========================================================
   Dr. Rakesh Kumar — Design System
   "Chart paper" concept: the visual language of a clinical
   observation chart — grid lines, tab numbers, plotted trace —
   applied to a personal/portfolio site for a trauma surgeon
   who builds clinical data systems.
   ========================================================= */

:root {
  --paper: #EDF1EE;
  --paper-raised: #F6F8F6;
  --ink: #14212A;
  --ink-muted: #4B5B57;
  --teal: #1D6F5C;
  --teal-dim: #2F7A68;
  --line: #C7D3CC;
  --line-strong: #9FB0A8;
  --flag: #9C3B2E;
  --flag-soft: #FBEAE7;

  --serif: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --measure: 54rem;
  --edge: clamp(1.5rem, 5vw, 5rem);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--flag); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ---------- grid-paper background ---------- */
.chart-ground {
  background-image:
    repeating-linear-gradient(to bottom, transparent, transparent 39px, var(--line) 40px),
    repeating-linear-gradient(to right, transparent, transparent 39px, rgba(199,211,204,0.5) 40px);
  background-position: 0 0;
}

/* ---------- nav ---------- */
.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.5rem var(--edge) 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.nav__mark {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.nav__mark:hover { color: var(--teal); }
.nav__links {
  display: flex;
  gap: 1.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav__links a { color: var(--ink-muted); text-decoration: none; }
.nav__links a:hover { color: var(--flag); }

/* ---------- hero ---------- */
.hero {
  padding: 3.5rem var(--edge) 2.5rem;
  border-bottom: 1px solid var(--line);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2.5rem;
  align-items: start;
}
.hero__photo img {
  width: 200px;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--paper-raised);
}
.hero__photo.illustration img {
  width: 340px;
  border: none;
  background: transparent;
}
@media (max-width: 800px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__photo { order: -1; }
  .hero__photo img { width: 140px; }
  .hero__photo.illustration img { width: 220px; }
  .hero__photo--wide img { width: 100%; }
}

.hero__photo--wide {
  align-self: center;
}
.hero__photo--wide img {
  width: 420px;
  max-width: 100%;
  border: none;
  border-radius: 6px;
  background: transparent;
  box-shadow: 0 20px 45px -20px rgba(20,33,42,0.35);
}
.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1.25rem;
}
.hero__eyebrow .badge {
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--teal);
  border-radius: 3px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--teal);
  background: var(--paper-raised);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}
.hero__role {
  font-family: var(--mono);
  font-size: 0.92rem;
  color: var(--ink-muted);
  max-width: 38rem;
  margin: 0 0 1.75rem;
  line-height: 1.7;
}
.motto {
  margin: 0.9rem 0;
  padding: 0 0 0 1rem;
  border-left: 3px solid var(--teal);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--teal);
}
.motto.hindi {
  font-family: "Noto Serif Devanagari", var(--serif);
  font-style: normal;
}
.hero__role strong { color: var(--ink); font-weight: 600; }
.hero p.bio {
  max-width: var(--measure);
  font-size: 1.05rem;
  color: var(--ink);
}
.hero p.bio em {
  font-style: normal;
  color: var(--teal-dim);
  font-weight: 600;
}
.hero p.bio strong { color: var(--flag); }
.credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--line-strong);
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
}
.credentials span::after {
  content: "·";
  margin-left: 0.9rem;
  color: var(--line-strong);
}
.credentials span:last-child::after { content: ""; }
.connect {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.connect a {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--teal);
  text-decoration: none;
  border: 1px solid var(--teal);
  border-radius: 2px;
  padding: 0.3rem 0.75rem;
}
.connect a:hover { background: var(--teal); color: #fff; }
.visit {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  line-height: 1.7;
}

/* ---------- trace divider (signature element) ---------- */
.trace {
  width: 100%;
  height: 46px;
  display: block;
}
.trace path {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  animation: draw 1.6s ease-out forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ---------- projects (register / log) ---------- */
.projects {
  padding: 2.5rem var(--edge) 4rem;
}
.projects__eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 2rem;
}
.log {
  border-top: 1px solid var(--ink);
}
.log__row {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  gap: 1.25rem;
  align-items: baseline;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: padding-left 0.25s ease, background 0.25s ease;
}
.log__row:hover, .log__row:focus-visible {
  padding-left: 0.6rem;
  background: var(--paper-raised);
}
.log__tab {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--teal);
}
.log__body h3 {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  color: var(--ink);
}
.log__body p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.98rem;
  max-width: 40rem;
}
.log__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  white-space: nowrap;
}
.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--teal);
  color: var(--teal);
  border-radius: 2px;
  padding: 0.2rem 0.55rem;
}
.log__go {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}
.log__row:hover .log__go, .log__row:focus-visible .log__go { color: var(--flag); }

/* ---------- footer ---------- */
.site-footer {
  padding: 2rem var(--edge) 2.5rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---------- project detail pages ---------- */
.doc {
  padding: 2.5rem var(--edge) 1rem;
  border-bottom: 1px solid var(--line);
}
.doc__tab {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--teal);
  margin-bottom: 1.1rem;
}
.doc h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2rem, 4.2vw, 2.9rem);
  line-height: 1.1;
  margin: 0 0 0.75rem;
  max-width: 34rem;
}
.doc__summary {
  max-width: var(--measure);
  font-size: 1.08rem;
  color: var(--ink-muted);
  margin: 0 0 1.75rem;
}
.doc__meta {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.content {
  padding: 2.5rem var(--edge) 4rem;
  max-width: 64rem;
}
.content section {
  margin-bottom: 2.75rem;
}
.content h2 {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}
.content h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.3rem 0 0.5rem;
}
.content p {
  max-width: var(--measure);
  margin: 0 0 1rem;
}
.content ul {
  padding-left: 1.15rem;
  max-width: var(--measure);
}
.content li { margin-bottom: 0.5rem; }

.flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
}
.flow__col {
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1.25rem 1.35rem;
  background: var(--paper-raised);
}
.flow__col h4 {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--flag);
  margin: 0 0 0.9rem;
}
.flow__col ol {
  margin: 0;
  padding-left: 1.1rem;
}
.flow__col li { margin-bottom: 0.6rem; font-size: 0.95rem; }

.back-link {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-decoration: none;
}

/* ---------- template link grid ---------- */
.tpl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 1rem;
}
.tpl-card {
  background: var(--paper-raised);
  padding: 1.1rem 1.2rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background 0.2s ease;
}
.tpl-card:hover, .tpl-card:focus-visible {
  background: var(--paper);
}
.tpl-card__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--teal);
}
.tpl-card__name {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}
.tpl-card__go {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
}
.tpl-card:hover .tpl-card__go, .tpl-card:focus-visible .tpl-card__go { color: var(--flag); }

/* ---------- sample dataset page: tabs + data tables ---------- */
.dept-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0 1.5rem;
}
.dept-tab {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--paper-raised);
  color: var(--ink-muted);
  cursor: pointer;
}
.dept-tab:hover { border-color: var(--teal); color: var(--teal); }
.dept-tab.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}
.dataset-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  margin: 0.75rem 0 1.5rem;
}
.dataset-legend span { display: inline-flex; align-items: center; gap: 0.4rem; }
.swatch { width: 0.8rem; height: 0.8rem; border-radius: 2px; display: inline-block; }
.swatch.kiosk { background: #1B4F6E; }
.swatch.lab { background: #6E4A9E; }
.swatch.desk { background: #1D6F5C; }
.swatch.target { background: #9C3B2E; }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 3px;
  max-height: 70vh;
  overflow-y: auto;
}
table.data-table {
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}
table.data-table th, table.data-table td {
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  text-align: left;
}
table.data-table thead th {
  position: sticky;
  top: 0;
  color: #fff;
  font-weight: 600;
  z-index: 2;
}
table.data-table th.col-kiosk, table.data-table td.col-kiosk { background: rgba(27,79,110,0.07); }
table.data-table th.col-lab, table.data-table td.col-lab { background: rgba(110,74,158,0.07); }
table.data-table th.col-desk, table.data-table td.col-desk { background: transparent; }
table.data-table th.col-target, table.data-table td.col-target { background: rgba(156,59,46,0.08); font-weight: 600; color: #9C3B2E; }
table.data-table thead th.col-kiosk { background: #1B4F6E; }
table.data-table thead th.col-lab { background: #6E4A9E; }
table.data-table thead th.col-desk { background: var(--teal); }
table.data-table thead th.col-target { background: #9C3B2E; color: #fff; }
table.data-table td.sticky, table.data-table th.sticky {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--paper-raised);
  font-weight: 600;
}
table.data-table thead th.sticky { z-index: 3; background: var(--ink); }

/* ---------- module flowchart ---------- */
.flowchart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin: 2rem 0;
}
.fc-node {
  width: 100%;
  max-width: 30rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 4px;
  padding: 0.9rem 1.2rem;
  background: var(--paper-raised);
  text-align: center;
}
.fc-node .fc-tab {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  display: block;
  margin-bottom: 0.3rem;
}
.fc-node h4 {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.3rem;
  color: var(--ink);
}
.fc-node p { margin: 0; font-size: 0.82rem; color: var(--ink-muted); }
.fc-node .fc-status {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
}
.fc-node.built { border-color: var(--teal); }
.fc-node.built .fc-status { background: var(--teal); color: #fff; }
.fc-node.partial { border-color: var(--teal); border-style: dashed; }
.fc-node.partial .fc-status { background: var(--paper); color: var(--teal); border: 1px solid var(--teal); }
.fc-node.future { border-color: var(--line-strong); border-style: dashed; }
.fc-node.future .fc-status { background: var(--paper); color: var(--ink-muted); border: 1px solid var(--line-strong); }
.fc-node.decision { border-color: var(--flag); background: #FBEAE7; }
.fc-node.decision h4 { color: var(--flag); }
.fc-node.decision .fc-status { background: var(--flag); color: #fff; }

.fc-arrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  padding: 0.5rem 0;
  text-align: center;
  line-height: 1.3;
}
.fc-arrow::before { content: "↓"; display: block; font-size: 1.1rem; color: var(--line-strong); }

.fc-branch {
  display: flex;
  gap: 1.5rem;
  width: 100%;
  max-width: 40rem;
  justify-content: center;
  flex-wrap: wrap;
}
.fc-branch .fc-node { max-width: 18rem; }

/* ---------- publications ---------- */
.publications {
  padding: 0 var(--edge) 3rem;
  border-bottom: 1px solid var(--line);
}
.pub-list {
  border-top: 1px solid var(--ink);
}
.pub-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.25rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}
.pub-year {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--teal);
}
.pub-row p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink);
  line-height: 1.55;
}
.pub-row p em { color: var(--ink-muted); font-style: italic; }
.pub-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.pub-links a {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--teal);
  text-decoration: none;
  border: 1px solid var(--teal);
  border-radius: 2px;
  padding: 0.3rem 0.75rem;
}
.pub-links a:hover { background: var(--teal); color: #fff; }

.slip-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.25rem;
}
.slip-card {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper-raised);
  padding: 1rem;
}
.slip-card img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  display: block;
}
.slip-card figcaption {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  text-align: center;
}
.identity-badge {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 2rem;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--teal);
  border-radius: 3px;
  background: var(--paper-raised);
}
.identity-badge img {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
}
.identity-badge .identity-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}
.identity-badge .identity-role {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  margin-top: 0.2rem;
}

.sub-register {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 1rem;
}
.sub-card {
  background: var(--paper-raised);
  padding: 1.2rem 1.3rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.sub-card:hover, .sub-card:focus-visible { background: var(--paper); }
.sub-card__name {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
}
.sub-card p { margin: 0; font-size: 0.86rem; color: var(--ink-muted); }
.sub-card__go {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--teal);
  margin-top: auto;
}
.sub-card:hover .sub-card__go, .sub-card:focus-visible .sub-card__go { color: var(--flag); }

@media (max-width: 640px) {
  .sub-register { grid-template-columns: 1fr; }
}

.example-card {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper-raised);
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
}
.example-card dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 1rem;
  margin: 0 0 1rem;
  font-size: 0.92rem;
}
.example-card dt { font-family: var(--mono); font-size: 0.76rem; color: var(--ink-muted); }
.example-card dd { margin: 0; }
.caution-box {
  background: #FBEAE7;
  border-left: 3px solid var(--flag);
  border-radius: 0 3px 3px 0;
  padding: 0.85rem 1.1rem;
  font-size: 0.92rem;
  color: var(--ink);
}
.caution-box strong { color: var(--flag); }

.diagram-figure {
  margin: 1.25rem 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--paper-raised);
  padding: 1rem;
}
.diagram-figure img {
  width: 100%;
  height: auto;
  border-radius: 2px;
  display: block;
}
.diagram-figure figcaption {
  margin-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-muted);
  text-align: center;
}

@media (max-width: 640px) {
  .log__row { grid-template-columns: 2.6rem 1fr; }
  .log__meta { grid-column: 2; align-items: flex-start; flex-direction: row; }
  .flow { grid-template-columns: 1fr; }
  .tpl-grid { grid-template-columns: 1fr; }
  .fc-branch { flex-direction: column; align-items: center; }
  .pub-row { grid-template-columns: 2.6rem 1fr; }
  .slip-pair { grid-template-columns: 1fr; }
}