/* =========================================================
   Sahan Advisory
   Plain CSS, no build step. Edit the tokens below to re-theme.
   ========================================================= */

:root {
  /* Color tokens */
  --bg: #0b1220;
  --bg-raised: #111a2e;
  --bg-hover: #17223a;
  --line: #22304d;
  --text: #c3cbdb;
  --text-dim: #8592ab;
  --heading: #eef2f8;
  --accent: #f5b84a;
  --accent-soft: rgba(245, 184, 74, 0.12);
  --accent-line: rgba(245, 184, 74, 0.45);
  --shadow: 0 18px 40px -20px rgba(2, 6, 18, 0.8);

  /* Type */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --fs-xs: 0.78rem;
  --fs-sm: 0.875rem;
  --fs-md: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-heading: clamp(1.5rem, 4vw, 2rem);

  /* Layout */
  --nav-h: 76px;
  --nav-h-scrolled: 64px;
  --gutter: clamp(16px, 6vw, 120px);
  --radius: 8px;
  --ease: cubic-bezier(0.645, 0.045, 0.355, 1);
  --t: 0.25s var(--ease);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-lg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.menu-open { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0 0 10px;
  color: var(--heading);
  font-weight: 650;
  line-height: 1.15;
}

p { margin: 0 0 15px; }

strong { color: var(--heading); font-weight: 600; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t);
}

a:hover,
a:focus-visible { color: var(--accent); }

:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 3px;
}

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

ul, ol { margin: 0; padding: 0; list-style: none; }

.mono { font-family: var(--font-mono); }

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 100;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
}
.skip-link:focus { left: 12px; color: var(--bg); }

.inline-link {
  color: var(--accent);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size var(--t);
}
.inline-link:hover,
.inline-link:focus-visible { background-size: 100% 1px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 24px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1;
  cursor: pointer;
  transition: transform var(--t), box-shadow var(--t), background var(--t);
}
.btn:hover,
.btn:focus-visible {
  color: var(--accent);
  background: var(--accent-soft);
  transform: translate(-3px, -3px);
  box-shadow: 3px 3px 0 0 var(--accent);
}
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover,
.btn-ghost:focus-visible { border-color: var(--accent); }
.btn-small { padding: 10px 16px; font-size: var(--fs-xs); }
.btn-large { padding: 20px 30px; font-size: var(--fs-md); }

/* ---------- Header / nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: var(--nav-h);
  padding: 0 clamp(16px, 4vw, 48px);
  background: rgba(11, 18, 32, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: height var(--t), transform var(--t), box-shadow var(--t);
}
.site-header.scrolled {
  height: var(--nav-h-scrolled);
  box-shadow: var(--shadow);
}
.site-header.hidden { transform: translateY(-100%); }

.nav {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo svg { width: 42px; height: 42px; flex-shrink: 0; }
.logo rect {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  transition: fill var(--t);
}
.logo-path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 3 4;
}
.logo-dot { fill: var(--accent); }
.logo:hover rect,
.logo:focus-visible rect { fill: var(--accent-soft); }

.logo-word {
  display: flex;
  flex-direction: column;
  color: var(--heading);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.05;
  letter-spacing: 0.01em;
}
.logo-sub {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.menu-links {
  display: flex;
  gap: 4px;
  counter-reset: nav;
}
.menu-links li { counter-increment: nav; }
.menu-links a {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--heading);
}
.menu-links a::before {
  content: "0" counter(nav) ".";
  margin-right: 6px;
  color: var(--accent);
}
.menu-links a.active { color: var(--accent); }

.menu-toggle {
  display: none;
  position: relative;
  z-index: 30;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.menu-toggle span {
  position: absolute;
  left: 6px;
  right: 6px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: transform var(--t), opacity var(--t), top var(--t);
}
.menu-toggle span:nth-child(1) { top: 12px; }
.menu-toggle span:nth-child(2) { top: 19px; right: 12px; }
.menu-toggle span:nth-child(3) { top: 26px; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* ---------- Side rails ---------- */
.rail {
  position: fixed;
  bottom: 0;
  z-index: 10;
  width: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.rail::after {
  content: "";
  display: block;
  width: 1px;
  height: 90px;
  margin-top: 20px;
  background: var(--text-dim);
}
.rail-left { left: 40px; }
.rail-right { right: 40px; }

.rail ul { display: flex; flex-direction: column; gap: 6px; }
.rail ul a {
  display: block;
  padding: 10px;
  color: var(--text-dim);
  transition: color var(--t), transform var(--t);
}
.rail ul a:hover,
.rail ul a:focus-visible { color: var(--accent); transform: translateY(-3px); }
.rail svg { width: 20px; height: 20px; }

.rail-email {
  writing-mode: vertical-rl;
  padding: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--text-dim);
  transition: color var(--t), transform var(--t);
}
.rail-email:hover,
.rail-email:focus-visible { transform: translateY(-3px); }

/* ---------- Main layout ---------- */
main {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 calc(var(--gutter) + 40px);
}

.section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 110px 0;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  font-size: var(--fs-heading);
  white-space: nowrap;
}
.section-title .mono {
  font-size: 0.7em;
  font-weight: 400;
  color: var(--accent);
}
.section-title::after {
  content: "";
  flex: 0 1 300px;
  height: 1px;
  margin-left: 16px;
  background: var(--line);
}

.section-intro {
  max-width: 620px;
  margin: -16px 0 36px;
  color: var(--text-dim);
  font-size: var(--fs-md);
}

.subhead {
  margin: 80px 0 28px;
  font-size: var(--fs-xl);
}

/* ---------- Hero ---------- */
.hero {
  max-width: 1000px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: calc(var(--nav-h) + 40px) 0 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hero-kicker {
  margin-bottom: 24px;
  color: var(--accent);
  font-size: var(--fs-sm);
}

.hero-name {
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-tagline {
  margin-top: 6px;
  color: var(--text-dim);
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-copy {
  max-width: 600px;
  margin-top: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: 100%;
  max-width: 760px;
  margin: 64px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.hero-stats div {
  padding: 18px 20px;
  background: var(--bg);
}
.hero-stats dt {
  color: var(--heading);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
}
.hero-stats dd {
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
}

/* ---------- Why Sahan ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 50px;
  align-items: start;
}

.lead {
  color: var(--heading);
  font-size: var(--fs-xl);
  line-height: 1.5;
}
.lead em { color: var(--accent); font-style: normal; }

.principles {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  box-shadow: var(--shadow);
}
.principles-title {
  margin-bottom: 18px;
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: 500;
}
.principles .tick-list { font-size: var(--fs-md); }
.principles .tick-list li { margin-bottom: 14px; }
.principles .tick-list li:last-child { margin-bottom: 0; }

.tick-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}
.tick-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
  line-height: inherit;
}

/* ---------- Process ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: none;
}
.process-step {
  position: relative;
  padding: 26px 22px;
  border-top: 2px solid var(--accent-line);
  background: var(--bg-raised);
  border-radius: 0 0 var(--radius) var(--radius);
}
.process-num {
  display: block;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: var(--fs-sm);
}
.process-step h3 { font-size: var(--fs-xl); }
.process-step p { margin: 0; color: var(--text); font-size: var(--fs-md); }

/* ---------- Engagement tabs ---------- */
.jobs {
  display: flex;
  gap: 32px;
  max-width: 820px;
  min-height: 300px;
}

.job-tabs {
  position: relative;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  width: max-content;
  border-left: 2px solid var(--line);
}

.job-tab {
  display: block;
  height: 46px;
  padding: 0 22px 0 20px;
  border: 0;
  background: none;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--t), background var(--t);
}
.job-tab:hover,
.job-tab:focus-visible { background: var(--bg-hover); color: var(--accent); }
.job-tab[aria-selected="true"] { color: var(--accent); }

.job-tab-indicator {
  position: absolute;
  top: 0;
  left: -2px;
  width: 2px;
  height: 46px;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.3s var(--ease);
}

.job-panel { padding-top: 4px; }
.job-panel h3 { font-size: var(--fs-xl); font-weight: 600; }
.job-panel .at { color: var(--accent); font-weight: 500; }
.job-meta {
  margin-bottom: 24px;
  color: var(--text-dim);
  font-size: var(--fs-xs);
}
.job-panel .tick-list { font-size: var(--fs-md); }
.job-panel:not([hidden]) { animation: fadeUp 0.35s var(--ease); }

/* ---------- Track record features ---------- */
.feature-list { display: grid; gap: 100px; }

.feature {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  align-items: center;
}

.feature-visual {
  grid-column: 1 / 8;
  grid-row: 1;
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  overflow: hidden;
}
.feature-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent-soft);
  mix-blend-mode: screen;
  transition: opacity var(--t);
}
.feature:hover .feature-visual::after { opacity: 0; }
.feature-visual svg { width: 100%; height: 100%; }

.fv-grid line { stroke: var(--line); stroke-width: 1; }
.fv-bars rect { fill: var(--accent); opacity: 0.75; }
.fv-line { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.fv-dot { fill: var(--heading); stroke: var(--accent); stroke-width: 3; }
.fv-heat rect { fill: var(--accent); opacity: 0.18; rx: 4; }
.fv-heat rect.h2 { opacity: 0.45; }
.fv-heat rect.h3 { opacity: 0.85; }

.feature-body {
  grid-column: 7 / -1;
  grid-row: 1;
  position: relative;
  z-index: 2;
  text-align: right;
}
.feature-kicker {
  margin-bottom: 6px;
  color: var(--accent);
  font-size: var(--fs-xs);
}
.feature-body h3 { font-size: clamp(1.4rem, 3vw, 1.75rem); margin-bottom: 20px; }
.feature-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-raised);
  box-shadow: var(--shadow);
  font-size: var(--fs-md);
}
.feature-card p { margin: 0; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin-top: 22px;
  color: var(--text-dim);
  font-size: var(--fs-xs);
}
.feature-body .tags { justify-content: flex-end; }

.feature-flip .feature-visual { grid-column: 6 / -1; }
.feature-flip .feature-body { grid-column: 1 / 7; text-align: left; }
.feature-flip .feature-body .tags { justify-content: flex-start; }

/* ---------- Service cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 30px 28px;
  border-radius: var(--radius);
  background: var(--bg-raised);
  box-shadow: var(--shadow);
  transition: transform var(--t);
}
.card:hover { transform: translateY(-6px); }
.card:hover h3 { color: var(--accent); }
.card-top { margin-bottom: 26px; color: var(--accent); }
.card-top svg { width: 38px; height: 38px; }
.card h3 { font-size: var(--fs-xl); transition: color var(--t); }
.card p { flex: 1; color: var(--text); font-size: var(--fs-md); }
.card .tags { margin-top: 12px; gap: 4px 14px; }

/* ---------- Contact ---------- */
.contact {
  max-width: 640px;
  padding-bottom: 140px;
  text-align: center;
}
.contact-kicker { margin-bottom: 18px; color: var(--accent); font-size: var(--fs-md); }
.contact-title { font-size: clamp(2.2rem, 6vw, 3.4rem); font-weight: 750; }
.contact p { margin: 18px 0 44px; }
.contact .contact-alt { margin: 28px 0 0; color: var(--text-dim); font-size: var(--fs-sm); }

/* ---------- Footer ---------- */
.site-footer {
  padding: 24px 16px 32px;
  text-align: center;
  color: var(--text-dim);
  font-size: var(--fs-xs);
}
.site-footer p { margin: 0; }
.site-footer p a:hover { color: var(--accent); }
.footer-social {
  display: none;
  justify-content: center;
  gap: 24px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
}

/* ---------- Reveal on scroll ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  main { padding: 0 calc(var(--gutter) + 20px); }
  .rail-left { left: 20px; }
  .rail-right { right: 20px; }
  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  main { padding: 0 32px; }
  .rail { display: none; }
  .footer-social { display: flex; }

  .menu-toggle { display: block; }
  .menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 25;
    width: min(75vw, 400px);
    height: 100vh;
    height: 100dvh;
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    padding: 48px 24px;
    background: var(--bg-raised);
    box-shadow: -10px 0 30px -15px rgba(2, 6, 18, 0.9);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s var(--ease), visibility 0.3s var(--ease);
  }
  .menu.open { transform: none; visibility: visible; }
  .menu-links { flex-direction: column; align-items: center; gap: 8px; }
  .menu-links a { font-size: var(--fs-md); text-align: center; }
  .menu-links a::before { display: block; margin: 0 0 4px; }
  .menu .btn-small { padding: 16px 40px; font-size: var(--fs-sm); }

  .site-header.menu-shown::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    background: rgba(5, 9, 18, 0.6);
    backdrop-filter: blur(3px);
  }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }

  .feature-visual,
  .feature-flip .feature-visual {
    grid-column: 1 / -1;
    height: 100%;
    aspect-ratio: auto;
    opacity: 0.25;
  }
  .feature-body,
  .feature-flip .feature-body {
    grid-column: 1 / -1;
    padding: 40px 32px 30px;
    text-align: left;
  }
  .feature-body .tags,
  .feature-flip .feature-body .tags { justify-content: flex-start; }
  .feature-card { padding: 20px 0; background: none; box-shadow: none; }
  .feature-list { gap: 30px; }
  .feature { border-radius: var(--radius); background: var(--bg-raised); box-shadow: var(--shadow); overflow: hidden; }
}

@media (max-width: 600px) {
  body { font-size: var(--fs-md); }
  main { padding: 0 16px; }
  .section { padding: 80px 0; }
  .section-title { white-space: normal; }
  .section-title::after { flex-basis: 80px; }
  .lead { font-size: var(--fs-lg); }

  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 48px; }

  .process { grid-template-columns: 1fr; }

  .jobs { flex-direction: column; gap: 24px; min-height: 0; }
  .job-tabs {
    flex-direction: row;
    width: 100%;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 2px solid var(--line);
    scrollbar-width: none;
  }
  .job-tabs::-webkit-scrollbar { display: none; }
  .job-tab { padding: 0 16px; text-align: center; }
  .job-tab-indicator {
    top: auto;
    bottom: -2px;
    left: 0;
    width: 120px;
    height: 2px;
  }

  .feature-body,
  .feature-flip .feature-body { padding: 30px 22px 24px; }

  .card { padding: 26px 22px; }
  .principles { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}