/* ==========================================================================
   Jinesh Dutt Joshi portfolio
   Tokens -> base -> layout -> components -> motion -> print
   ========================================================================== */

:root {
  --bg: #f4f6fa;
  --bg-alt: #eaeef5;
  --surface: #ffffff;
  --ink: #0f1729;
  --muted: #55627a;
  --line: #d9dfea;
  --accent: #3438c9;
  --accent-ink: #ffffff;
  --accent-soft: #e6e7fb;
  --ok: #0e8a5f;
  --chip: #edf0f7;

  --font-display: "Bricolage Grotesque", "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", Consolas, monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --wrap: 1120px;
  --header-h: 64px;
}

/* Dark: follows the OS unless the visitor picks a theme */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1020;
    --bg-alt: #0f1630;
    --surface: #121a30;
    --ink: #e9edf7;
    --muted: #9aa7c0;
    --line: #243050;
    --accent: #9da2ff;
    --accent-ink: #0b1020;
    --accent-soft: #1d2447;
    --ok: #4fd1a1;
    --chip: #1a2440;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1020;
  --bg-alt: #0f1630;
  --surface: #121a30;
  --ink: #e9edf7;
  --muted: #9aa7c0;
  --line: #243050;
  --accent: #9da2ff;
  --accent-ink: #0b1020;
  --accent-soft: #1d2447;
  --ok: #4fd1a1;
  --chip: #1a2440;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 100;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: var(--radius-sm); transition: top .15s;
}
.skip-link:focus { top: 1rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); text-decoration: none; margin-right: auto; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px;
  border-radius: 9px; background: var(--accent); color: var(--accent-ink);
  font-family: var(--font-display); font-weight: 700; font-size: .95rem; letter-spacing: -0.03em;
}
.brand-name { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.01em; }

.nav-list { display: flex; gap: .25rem; }
.nav-list a {
  display: block; padding: .5rem .8rem; border-radius: var(--radius-sm);
  color: var(--muted); text-decoration: none; font-weight: 500; font-size: .97rem;
}
.nav-list a:hover { color: var(--ink); background: var(--chip); }
.nav-list a.is-active { color: var(--accent); background: var(--accent-soft); }

.nav-toggle, .theme-toggle {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--surface);
  color: var(--ink); cursor: pointer;
}
.nav-toggle:hover, .theme-toggle:hover { border-color: var(--accent); }
.nav-toggle { display: none; }
.nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after {
  display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; transition: transform .2s, opacity .2s;
}
.nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* ---------- Buttons ---------- */
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; }
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .8rem 1.25rem; border-radius: 10px; border: 1px solid transparent;
  font: 500 1rem var(--font-body); text-decoration: none; cursor: pointer;
  transition: transform .15s, background-color .15s, border-color .15s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 86%, var(--ink)); }
.btn-secondary { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--accent); }

/* ---------- Hero ---------- */
.hero { padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 5rem); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero h1 { font-size: clamp(2.8rem, 7.2vw, 5.2rem); font-weight: 700; letter-spacing: -0.035em; }
.hero-role { margin-top: .9rem; font-family: var(--font-display); font-size: clamp(1.25rem, 2.6vw, 1.6rem); font-weight: 500; color: var(--accent); }
.hero-lead { margin-top: 1.25rem; max-width: 34rem; font-size: 1.15rem; color: var(--muted); }
.hero .cta-row { margin-top: 2rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin-top: 1.5rem; font-size: .98rem; }

/* Request-flow panel: the one signature element */
.trace {
  margin: 0; padding: 1.25rem 1.4rem 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
}
.trace-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-bottom: .9rem; border-bottom: 1px solid var(--line); }
.trace-title { font: 500 .85rem var(--font-mono); color: var(--muted); }
.trace-replay {
  font: 500 .8rem var(--font-mono); color: var(--accent); background: var(--accent-soft);
  border: 0; border-radius: 6px; padding: .3rem .65rem; cursor: pointer;
}
.trace-replay:hover { text-decoration: underline; }
.trace-steps { padding: .9rem 0 .4rem; }
.trace-steps li { position: relative; display: grid; grid-template-columns: 14px 1fr; gap: .95rem; padding: .55rem 0; }
.trace-steps li:not(:last-child)::after {
  content: ""; position: absolute; left: 6px; top: 1.65rem; bottom: -.4rem; width: 2px; background: var(--line);
}
.trace-dot { width: 14px; height: 14px; margin-top: .3rem; border-radius: 50%; background: var(--surface); border: 2px solid var(--line); transition: background-color .3s, border-color .3s; }
.trace-label { display: block; font: 500 .82rem var(--font-mono); color: var(--accent); }
.trace-text { display: block; font-size: .98rem; line-height: 1.45; }
.trace figcaption { margin-top: .6rem; padding-top: .8rem; border-top: 1px solid var(--line); font-size: .85rem; color: var(--muted); }

/* JS-enhanced sequence: content stays visible without JS */
.js .trace-steps li { opacity: .35; transition: opacity .35s; }
.js .trace-steps li.on { opacity: 1; }
.js .trace-steps li.on .trace-dot { background: var(--ok); border-color: var(--ok); }
.js .trace-steps li.on:not(:last-child)::after { background: var(--ok); }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(2rem, 4.5vw, 2.9rem); margin-bottom: 2rem; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.prose { max-width: 38rem; display: grid; gap: 1.1rem; }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.facts > div { background: var(--surface); padding: 1.15rem 1.25rem; }
.facts dt { font-size: .92rem; color: var(--muted); line-height: 1.35; order: 2; }
.facts dd { font: 700 2rem/1.1 var(--font-display); letter-spacing: -0.02em; }
.facts > div { display: flex; flex-direction: column; gap: .35rem; }
.facts .facts-note { font: 400 .8rem var(--font-body); color: var(--muted); letter-spacing: 0; order: 3; }

/* Experience */
.role { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2.2rem); }
.role-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; }
.role h3 { font-size: 1.6rem; }
.role-org { color: var(--muted); margin-top: .2rem; }
.role-date { font: 500 .92rem var(--font-mono); color: var(--accent); }
.role-scope { margin-top: 1rem; padding: .7rem 1rem; background: var(--accent-soft); border-radius: var(--radius-sm); font-size: .98rem; }
.role-list { margin-top: 1.25rem; display: grid; gap: .85rem; }
.role-list li { position: relative; padding-left: 1.4rem; max-width: 62rem; }
.role-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.role-list strong, .project-points strong { font-weight: 500; background: var(--accent-soft); padding: 0 .3em; border-radius: 4px; }

/* Projects */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.project {
  display: flex; flex-direction: column; gap: 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.25rem, 2.5vw, 1.8rem); transition: border-color .2s, transform .2s;
}
.project:hover { border-color: var(--accent); transform: translateY(-3px); }
.project-featured { grid-column: 1 / -1; border-left: 5px solid var(--accent); }
.project-featured .project-points { columns: 1; }
.project-tag { display: inline-block; font: 500 .82rem var(--font-mono); color: var(--accent); background: var(--accent-soft); padding: .15rem .55rem; border-radius: 6px; margin-bottom: .6rem; }
.project h3 { font-size: 1.5rem; }
.project-featured h3 { font-size: 2rem; }
.project-sub { color: var(--muted); margin-top: .25rem; font-size: .98rem; }
.project-points { display: grid; gap: .65rem; font-size: 1rem; }
.project-points li { position: relative; padding-left: 1.2rem; }
.project-points li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
.project .chips { margin-top: auto; padding-top: .4rem; }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.chips li { font: 500 .85rem var(--font-mono); background: var(--chip); border: 1px solid var(--line); padding: .25rem .65rem; border-radius: 6px; }

/* Skills */
.skills { display: grid; gap: 0; border-top: 1px solid var(--line); }
.skill-row { display: grid; grid-template-columns: 15rem 1fr; gap: 1rem 2rem; padding: 1.15rem 0; border-bottom: 1px solid var(--line); }
.skill-row dt { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.01em; }
.skill-row-core .chips li { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* Education */
.edu { display: grid; gap: 1rem; max-width: 46rem; }
.edu li { display: grid; grid-template-columns: 5rem 1fr; gap: 1rem; padding: 1.2rem 1.4rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.edu-year { font: 500 1rem var(--font-mono); color: var(--accent); }
.edu h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
.edu p:not(.edu-year) { color: var(--muted); margin-top: .2rem; }

/* Contact */
.contact { background: var(--bg-alt); }
.contact-lead { max-width: 34rem; color: var(--muted); font-size: 1.15rem; margin-bottom: 1.75rem; }
.contact-list { margin-top: 2.5rem; display: grid; gap: .6rem; }
.contact-list li { display: grid; grid-template-columns: 6rem 1fr; gap: 1rem; padding-top: .6rem; border-top: 1px solid var(--line); }
.contact-list li span { color: var(--muted); }

/* Footer */
.site-footer { padding: 1.75rem 0; border-top: 1px solid var(--line); font-size: .95rem; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- Scroll reveal (light touch, projects only) ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease, border-color .2s; }
.js [data-reveal].in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .about-grid { grid-template-columns: 1fr; }
  .skill-row { grid-template-columns: 1fr; gap: .6rem; }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-grid; }
  .nav { order: 3; }
  .nav-list {
    display: none; position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; gap: .15rem; padding: .75rem 1.25rem 1rem;
    background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .nav-list.open { display: flex; }
  .nav-list a { padding: .75rem .8rem; }
  .projects { grid-template-columns: 1fr; }
  .brand-name { font-size: .95rem; }
}
@media (max-width: 480px) {
  .facts { grid-template-columns: 1fr; }
  .edu li, .contact-list li { grid-template-columns: 1fr; gap: .2rem; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .js .trace-steps li { opacity: 1; }
  .btn:hover, .project:hover { transform: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .theme-toggle, .trace-replay, .skip-link, .site-footer a { display: none !important; }
  body { background: #fff; color: #000; }
  .section, .hero { padding: 1.5rem 0; }
  .project, .role { break-inside: avoid; }
}

/* ==========================================================================
   Skills tree
   ========================================================================== */
[hidden] { display: none !important; }
.skills-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.skills-head h2 { margin-bottom: 0; }
.view-toggle { display: none; padding: .55rem 1rem; }
.js .view-toggle { display: inline-flex; }

.tree-tools { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-bottom: 1rem; }
.tree-search input {
  width: 15rem; max-width: 100%; padding: .6rem .9rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink); font: inherit; font-size: .95rem;
}
.tree-search input::placeholder { color: var(--muted); }
.tree-chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.tree-chip {
  font: 500 .85rem var(--font-mono); cursor: pointer; padding: .35rem .8rem; border-radius: 999px;
  color: var(--ink); background: var(--surface); border: 2px solid var(--c);
}
.tree-chip:hover { background: color-mix(in srgb, var(--c) 18%, var(--surface)); }
.tree-chip[aria-pressed="true"] { background: var(--c); color: #0b1020; }

/* The canvas is always dark so the branch colors keep their contrast in both themes */
.tree-panel {
  position: relative; overflow: hidden; border-radius: 18px; border: 1px solid #243050;
  background: radial-gradient(ellipse at 50% 35%, #1a2350 0%, #0b1020 72%);
  aspect-ratio: 1400 / 990; max-height: 88vh; width: 100%;
}
.tree-svg { display: block; width: 100%; height: 100%; cursor: grab; }
.tree-svg.panning { cursor: grabbing; }
.tree-svg text { font-family: var(--font-body); font-size: 14px; fill: #d5ddf2; paint-order: stroke; stroke: #0b1020; stroke-width: 3px; stroke-linejoin: round; user-select: none; }
.tree-svg .name { font-family: var(--font-display); font-size: 24px; font-weight: 700; fill: #f2f5fc; }
.tree-svg .subname { font-size: 14px; fill: #9aa7c0; }
.tree-svg .plbl { font-style: italic; fill: #ffe082; }

.tree-svg .trunk { fill: none; stroke: #8593bd; stroke-width: 15; stroke-linecap: round; opacity: .85; }
.tree-svg .branch { fill: none; stroke-width: 6; stroke-linecap: round; opacity: .75; transition: opacity .25s; }
.tree-svg .twig { fill: none; stroke-width: 1.6; opacity: .6; }
.tree-svg .plink { fill: none; stroke: #ffd54f; stroke-width: 1.4; opacity: .5; }
.tree-svg .tip { filter: drop-shadow(0 0 6px currentColor); transition: opacity .25s; }
.tree-svg .hit { fill: transparent; }
.tree-svg .dot { transition: transform .2s; transform-box: fill-box; transform-origin: center; }

.tree-svg .leaf, .tree-svg .proj { cursor: pointer; outline: none; transition: opacity .25s; }
.tree-svg .leaf:hover .dot, .tree-svg .proj:hover .dot,
.tree-svg .leaf:focus-visible .dot, .tree-svg .proj:focus-visible .dot,
.tree-svg .leaf[aria-pressed="true"] .dot, .tree-svg .proj[aria-pressed="true"] .dot { transform: scale(1.7); }
.tree-svg .leaf:hover .lbl, .tree-svg .proj:hover .lbl,
.tree-svg .leaf:focus-visible .lbl, .tree-svg .proj:focus-visible .lbl,
.tree-svg .leaf.lit .lbl, .tree-svg .proj.lit .lbl { fill: #fff; font-weight: 500; }
.tree-svg .leaf:focus-visible .hit, .tree-svg .proj:focus-visible .hit { stroke: #fff; stroke-width: 2; stroke-dasharray: 3 3; }
.tree-svg .dim { opacity: .2; }

/* Grow-in (only when motion is allowed) */
.tree-svg.grow .leaf .dot, .tree-svg.grow .leaf .lbl,
.tree-svg.grow .proj .dot, .tree-svg.grow .proj .lbl { opacity: 0; }
.tree-svg.grow.in .leaf .dot, .tree-svg.grow.in .leaf .lbl,
.tree-svg.grow.in .proj .dot, .tree-svg.grow.in .proj .lbl { animation: tree-fade .6s ease-out both; animation-delay: var(--d, 0s); }
@keyframes tree-fade { from { opacity: 0; } to { opacity: 1; } }

.tree-zoom { position: absolute; right: .75rem; bottom: .75rem; display: flex; gap: .35rem; }
.tree-zoom button {
  min-width: 36px; height: 36px; padding: 0 .6rem; border-radius: 9px; cursor: pointer;
  border: 1px solid #33426b; background: #121a30; color: #e9edf7; font: 500 1rem var(--font-body);
}
.tree-zoom button:hover { border-color: #9da2ff; }

.tree-tip {
  position: absolute; z-index: 5; max-width: 18rem; pointer-events: none;
  display: grid; gap: .15rem; padding: .55rem .75rem; border-radius: 10px;
  background: #121a30; color: #e9edf7; border: 1px solid #33426b; font-size: .85rem; line-height: 1.4;
}
.tree-tip strong { font-weight: 500; color: #fff; }
.tree-tip span { color: #b4bfd8; }
.tree-hint { margin-top: .75rem; font-size: .9rem; color: var(--muted); max-width: 46rem; }

@media (max-width: 900px) { .tree-panel { max-height: none; } }
@media (prefers-reduced-motion: reduce) {
  .tree-svg .branch, .tree-svg .leaf, .tree-svg .proj, .tree-svg .dot { transition: none !important; }
  .tree-svg.grow .leaf .dot, .tree-svg.grow .leaf .lbl, .tree-svg.grow .proj .dot, .tree-svg.grow .proj .lbl { opacity: 1; animation: none !important; }
}