/* ===================================================================
   Krupal Tandel — Portfolio
   Design tokens (colors, fonts) follow the final state of the
   Claude Design handoff: primary blue reconciled to #1e5fd6.
   =================================================================== */

@font-face { font-family:"Avenir LT Std"; src:url("../assets/fonts/AvenirLTStd-Light.otf") format("opentype"); font-weight:300; font-style:normal; font-display:swap; }
@font-face { font-family:"Avenir LT Std"; src:url("../assets/fonts/AvenirLTStd-Roman.otf") format("opentype"); font-weight:400; font-style:normal; font-display:swap; }
@font-face { font-family:"Avenir LT Std"; src:url("../assets/fonts/AvenirLTStd-Medium.otf") format("opentype"); font-weight:500; font-style:normal; font-display:swap; }
@font-face { font-family:"Avenir LT Std"; src:url("../assets/fonts/AvenirLTStd-Heavy.otf") format("opentype"); font-weight:700; font-style:normal; font-display:swap; }
@font-face { font-family:"Avenir LT Std"; src:url("../assets/fonts/AvenirLTStd-Black.otf") format("opentype"); font-weight:800 900; font-style:normal; font-display:swap; }

:root {
  /* Slate neutrals */
  --slate-0:  #ffffff;
  --slate-1:  #f7f9fb;
  --slate-2:  #eef2f6;
  --slate-3:  #e1e7ee;
  --slate-4:  #cdd6e0;
  --slate-5:  #aab6c4;
  --slate-6:  #7d8a9a;
  --slate-7:  #56636f;
  --slate-8:  #38424c;
  --slate-9:  #232b33;
  --ink:      #0d1216;

  /* Primary blue (reconciled brand blue) */
  --blue:        #1e5fd6;
  --blue-hover:  #184fb5;
  --blue-deep:   #2358a6;
  --blue-soft:   #eaf1fb;
  --blue-soft-border: #c5dbf6;

  /* Teal accent */
  --teal-1: #e3f4f1;
  --teal-2: #b6e4dc;
  --teal-4: #3fa898;
  --teal-5: #2b8779;
  --teal-6: #1f6960;

  /* Status */
  --green: #2f9e5e;
  --amber: #d6a525;
  --amber-text: #9a7a1f;

  /* Surfaces */
  --bg-page: var(--slate-1);
  --card-bg: var(--slate-0);
  --card-border: var(--slate-3);
  --shadow-sm: 0 1px 3px rgba(20,26,31,0.06), 0 1px 2px rgba(20,26,31,0.04);
  --shadow-md: 0 4px 12px rgba(20,26,31,0.07), 0 2px 4px rgba(20,26,31,0.04);
  --shadow-lg: 0 12px 28px rgba(20,26,31,0.10), 0 4px 8px rgba(20,26,31,0.05);

  /* Dark section */
  --dark-bg: #0d1216;
  --dark-card: #1b232b;
  --dark-border: #2a333d;

  --ease: cubic-bezier(0.32,0.72,0,1);

  --container-w: 1080px;
  --container-pad: 40px;
}

/* ---------- Reset / base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-page);
  color: var(--slate-9);
  font-family: "Avenir LT Std", "Avenir Next", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
img, svg { display: block; max-width: 100%; }
.mono { font-family: "IBM Plex Mono", monospace; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 100;
  background: var(--blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  transition: top 150ms var(--ease);
}
.skip-link:focus { top: 12px; }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section { padding: 96px 0; border-top: 1px solid var(--slate-3); }
.section--dark { background: var(--dark-bg); color: var(--slate-3); padding: 104px 0; border-top: none; }
.section--tight { padding: 96px 0; }

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 48px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate-6);
}
.section__index { font-size: 12px; color: var(--slate-5); }
.section--dark .eyebrow { color: var(--teal-4); }
.section--dark .section__index { color: var(--slate-7); }

/* ---------- Nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247,249,251,0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-3);
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.wordmark { display: inline-flex; align-items: center; gap: 12px; }
.wordmark__text { font-size: 18px; letter-spacing: -0.01em; }
.wordmark__first { font-weight: 600; color: var(--ink); }
.wordmark__last { font-weight: 400; color: var(--blue); }

.site-nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--slate-7);
  transition: color 150ms var(--ease);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: 11px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease), color 150ms var(--ease);
}
.btn--primary {
  background: var(--blue);
  color: #fff;
  padding: 13px 20px;
  font-size: 15px;
  border-radius: 11px;
}
.btn--primary:hover, .btn--primary:focus-visible { background: var(--blue-hover); }
.btn--secondary {
  background: #fff;
  border: 1px solid var(--slate-4);
  color: var(--ink);
  padding: 13px 20px;
  font-size: 15px;
}
.btn--secondary:hover, .btn--secondary:focus-visible { border-color: var(--blue); color: var(--blue-deep); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  transition: background-color 150ms var(--ease);
}
.nav-cta:hover, .nav-cta:focus-visible { background: var(--blue-hover); }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--slate-3);
  background: #fff;
  cursor: pointer;
}
.nav-toggle__bars { position: relative; width: 18px; height: 12px; }
.nav-toggle__bars span {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 200ms var(--ease), opacity 200ms var(--ease), top 200ms var(--ease);
}
.nav-toggle__bars span:nth-child(1) { top: 0; }
.nav-toggle__bars span:nth-child(2) { top: 5px; }
.nav-toggle__bars span:nth-child(3) { top: 10px; }
.site-nav.is-open .nav-toggle__bars span:nth-child(1) { top: 5px; transform: rotate(45deg); }
.site-nav.is-open .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-nav.is-open .nav-toggle__bars span:nth-child(3) { top: 5px; transform: rotate(-45deg); }

.nav-panel { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 84px 0 96px; scroll-margin-top: 84px; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.32fr 0.68fr;
  gap: 56px;
  align-items: center;
}
.hero__eyebrow-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.hero__role {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate-6);
}
.hero__title {
  font-size: clamp(32px, 12px + 5.6vw, 60px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
  text-wrap: balance;
}
.hero__subtext {
  margin-top: 24px;
  font-size: clamp(17px, 15px + 0.6vw, 20px);
  line-height: 1.6;
  color: var(--slate-7);
  max-width: 560px;
}
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--slate-3);
  align-items: flex-end;
}
.hero__stat { display: flex; flex-direction: column; gap: 5px; }
.hero__stat-label { font-size: 10px; letter-spacing: 0.06em; color: var(--slate-5); }
.hero__stat-value { font-size: 15px; font-weight: 600; color: var(--slate-9); }
.hero__pill {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border-radius: 999px;
  background: var(--teal-1);
  border: 1px solid var(--teal-2);
}
.hero__pill-dot { width: 7px; height: 7px; border-radius: 999px; background: var(--teal-5); }
.hero__pill-text { font-size: 13px; font-weight: 600; color: var(--teal-6); }

.status-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 24px;
}
.status-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--slate-2);
}
.status-card__label { font-size: 11px; letter-spacing: 0.06em; color: var(--slate-6); }
.status-card__live { display: inline-flex; align-items: center; gap: 6px; }
.status-card__live-dot { width: 7px; height: 7px; border-radius: 999px; background: var(--green); }
.status-card__live-text { font-size: 11px; color: var(--green); }
.status-card__rows { display: flex; flex-direction: column; gap: 14px; padding-top: 18px; }
.status-card__row { display: flex; align-items: center; justify-content: space-between; }
.status-card__row-label { font-size: 12px; color: var(--slate-6); }
.status-card__row-value { font-size: 15px; font-weight: 700; color: var(--ink); }
.status-card__row-value--teal { color: var(--teal-5); }

/* ---------- About / Story ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
}
.about__heading {
  font-size: clamp(24px, 17px + 2vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
  position: sticky;
  top: 100px;
}
.about__body { display: flex; flex-direction: column; gap: 20px; max-width: 620px; }
.about__body p { font-size: clamp(16px, 15px + 0.4vw, 18px); line-height: 1.7; color: var(--slate-8); }

/* ---------- Timeline / Path ---------- */
.timeline { display: grid; grid-template-columns: 150px 1fr; gap: 0; }
.timeline__date { font-size: 13px; color: var(--slate-6); padding-top: 2px; }
.timeline__date--current { color: var(--teal-5); }
.timeline__item {
  border-left: 1px solid var(--slate-3);
  padding: 0 0 48px 36px;
  position: relative;
}
.timeline__item--current { border-left: none; padding-bottom: 0; }
.timeline__dot {
  position: absolute;
  left: -5px; top: 6px;
  width: 9px; height: 9px;
  border-radius: 999px;
  background: var(--blue);
  border: 2px solid var(--bg-page);
}
.timeline__dot--current {
  width: 11px; height: 11px;
  background: var(--teal-5);
  box-shadow: 0 0 0 4px var(--teal-1);
}
.timeline__org { font-size: 11px; letter-spacing: 0.06em; color: var(--slate-5); margin-bottom: 6px; }
.timeline__org--current { color: var(--teal-5); }
.timeline__role { font-size: clamp(19px, 17px + 0.6vw, 22px); font-weight: 700; letter-spacing: -0.01em; color: var(--ink); margin-bottom: 8px; }
.timeline__desc { font-size: 16px; line-height: 1.6; color: var(--slate-7); max-width: 640px; }

/* ---------- Selected work ---------- */
.work-featured {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 36px 40px;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  transition: box-shadow 200ms var(--ease), transform 200ms var(--ease);
}
.work-featured:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.work-featured__eyebrow { font-size: 11px; letter-spacing: 0.06em; color: var(--teal-5); margin-bottom: 14px; }
.work-featured__title { font-size: clamp(22px, 18px + 1.2vw, 28px); font-weight: 800; letter-spacing: -0.02em; color: var(--ink); line-height: 1.15; margin-bottom: 12px; }
.work-featured__desc { font-size: 16px; line-height: 1.6; color: var(--slate-7); max-width: 580px; margin-bottom: 20px; }
.work-featured__metric {
  text-align: right;
  padding-left: 48px;
  border-left: 1px solid var(--slate-2);
}
.work-featured__metric-value { font-size: clamp(38px, 22px + 4.4vw, 60px); font-weight: 800; letter-spacing: -0.03em; color: var(--ink); line-height: 1; white-space: nowrap; }
.work-featured__metric-label { font-size: 11px; letter-spacing: 0.06em; color: var(--slate-6); margin-top: 10px; }

.work-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.work-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  padding: 28px;
  transition: box-shadow 200ms var(--ease), transform 200ms var(--ease);
}
.work-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.work-card__eyebrow { font-size: 11px; letter-spacing: 0.06em; color: var(--slate-5); margin-bottom: 14px; }
.work-card__eyebrow--accent { color: var(--teal-5); }
.work-card__title { font-size: clamp(18px, 16px + 0.6vw, 21px); font-weight: 700; letter-spacing: -0.01em; color: var(--ink); line-height: 1.2; margin-bottom: 10px; }
.work-card__desc { font-size: 15px; line-height: 1.6; color: var(--slate-7); margin-bottom: 18px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--slate-2);
  border: 1px solid var(--slate-3);
  color: var(--slate-7);
  font-size: 11px;
}
.tag--accent { background: var(--teal-1); border-color: var(--teal-2); color: var(--teal-6); }
.tag--blue { background: var(--blue-soft); border-color: var(--blue-soft-border); color: var(--blue-deep); }

/* ---------- Skills ---------- */
.skills__grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px 48px; }
.skills__group-title { font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 16px; }
.skill-pill { padding: 5px 11px; border-radius: 999px; background: #fff; border: 1px solid var(--slate-3); color: var(--slate-8); font-size: 13px; }

/* ---------- Where I'm heading (dark) ---------- */
.roadmap__intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 56px;
}
.roadmap__heading { font-size: clamp(28px, 15px + 3.6vw, 46px); font-weight: 800; line-height: 1.08; letter-spacing: -0.025em; color: #fff; text-wrap: balance; }
.roadmap__lead { font-size: 18px; line-height: 1.7; color: var(--slate-5); }
.roadmap__cards { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.roadmap-card { background: var(--dark-card); border: 1px solid var(--dark-border); border-radius: 14px; padding: 26px; }
.roadmap-card__eyebrow { font-size: 11px; letter-spacing: 0.06em; color: var(--teal-4); margin-bottom: 16px; }
.roadmap-card__title { font-size: clamp(17px, 16px + 0.4vw, 19px); font-weight: 700; color: #fff; margin-bottom: 10px; }
.roadmap-card__desc { font-size: 14px; line-height: 1.6; color: var(--slate-6); }
.roadmap__footer { margin: 32px 0 0; font-size: 15px; line-height: 1.7; color: var(--slate-7); max-width: 720px; }

/* ---------- Education & credentials ---------- */
.credentials__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.credential-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 18px 0;
  border-top: 1px solid var(--slate-3);
  gap: 16px;
}
.credential-row__title { font-size: 17px; font-weight: 700; color: var(--ink); }
.credential-row__sub { font-size: 14px; color: var(--slate-7); margin-top: 3px; }
.credential-row__meta { font-size: 13px; color: var(--slate-6); white-space: nowrap; }
.credential-row__meta--done { color: var(--teal-5); }
.credential-row__meta--progress { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--amber-text); }
.credential-row__progress-dot { width: 7px; height: 7px; border-radius: 999px; background: var(--amber); }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.contact__heading { font-size: clamp(32px, 18px + 4vw, 52px); font-weight: 800; line-height: 1.05; letter-spacing: -0.025em; color: var(--ink); }
.contact__lead { margin: 20px 0 32px; font-size: 19px; line-height: 1.6; color: var(--slate-7); max-width: 520px; }
.contact__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.contact-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-card__row { display: flex; flex-direction: column; gap: 4px; }
.contact-card__label { font-size: 10px; letter-spacing: 0.06em; color: var(--slate-5); }
.contact-card__value { font-size: 15px; font-weight: 600; color: var(--slate-9); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--slate-3); padding: 36px 0; }
.site-footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.site-footer__mark { font-weight: 800; font-size: 22px; letter-spacing: -0.06em; line-height: 1; }
.site-footer__mark-k { color: var(--ink); }
.site-footer__mark-t { color: var(--blue); }
.site-footer__copy { font-size: 12px; color: var(--slate-5); }

/* ===================================================================
   Responsive
   =================================================================== */
@media (max-width: 860px) {
  .container { --container-pad: 28px; }

  .site-nav__links { display: none; }
  .nav-toggle { display: flex; }
  .nav-panel {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px 0 20px;
    border-top: 1px solid var(--slate-3);
  }
  .site-nav.is-open .nav-panel { display: flex; }
  .nav-panel > .container { width: 100%; }
  .nav-panel .nav-link {
    padding: 12px 4px;
    border-bottom: 1px solid var(--slate-2);
    font-size: 16px;
  }
  .nav-panel .nav-cta { justify-content: center; margin-top: 12px; }

  .hero { padding: 56px 0 64px; }
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__pill { margin-left: 0; }

  .section { padding: 64px 0; }
  .section--dark { padding: 72px 0; }
  .section__head { margin-bottom: 36px; }

  .about__grid { grid-template-columns: 1fr; gap: 28px; }
  .about__heading { position: static; }

  .timeline { grid-template-columns: 1fr; }
  .timeline__date { padding-top: 0; margin-bottom: 6px; }
  .timeline__item { padding-bottom: 40px; }

  .work-featured { grid-template-columns: 1fr; padding: 28px; gap: 24px; }
  .work-featured__metric { text-align: left; padding-left: 0; padding-top: 20px; border-left: none; border-top: 1px solid var(--slate-2); }
  .work-grid { grid-template-columns: 1fr; }

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

  .roadmap__intro { grid-template-columns: 1fr; align-items: start; gap: 20px; margin-bottom: 40px; }
  .roadmap__cards { grid-template-columns: 1fr; }

  .credentials__grid { grid-template-columns: 1fr; gap: 8px; }

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

@media (max-width: 560px) {
  .container { --container-pad: 20px; }

  .section { padding: 48px 0; }
  .section--dark { padding: 56px 0; }

  .hero { padding: 44px 0 48px; }
  .hero__stats { gap: 24px; }

  .work-featured__title { line-height: 1.2; }

  .skills__grid { grid-template-columns: 1fr; gap: 28px; }

  .credential-row { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}