/* Scrollytelling personal site — D.L. Narasimhan */

:root {
  --navy: #0a2540;
  --navy-mid: #123352;
  --navy-soft: #1a4468;
  --orange: #ff6b35;
  --orange-deep: #e55a2b;
  --sand: #e8eef4;
  --ink: #142033;
  --muted: #5c6b7a;
  --white: #ffffff;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--sand);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.display {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

/* Nav */
.navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.navbar.is-solid {
  background: rgba(10, 37, 64, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(10, 37, 64, 0.18);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 2.5rem));
}

.nav-brand {
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.2rem;
  color: var(--white);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: 1.35rem;
  list-style: none;
}

.nav-link {
  color: rgba(255, 255, 255, 0.86);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--orange);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.4rem;
}

.mobile-menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--white);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--orange);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--orange-deep);
}

.btn-ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  color: var(--white);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-dark {
  background: var(--navy);
  color: var(--white);
}

.btn-outline {
  border: 1.5px solid var(--navy);
  color: var(--navy);
}

/* Hero — full bleed */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  transform: scale(1.04);
  transition: transform 1.4s var(--ease);
}

.hero.is-ready .hero-media img {
  transform: scale(1);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 37, 64, 0.35) 0%, rgba(10, 37, 64, 0.55) 42%, rgba(10, 37, 64, 0.92) 100%),
    radial-gradient(ellipse at 70% 20%, rgba(255, 107, 53, 0.18), transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-h) + 3rem) 0 4.5rem;
  max-width: 40rem;
}

.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  margin: 0.35rem 0 0.75rem;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.hero.is-ready .hero-name {
  opacity: 1;
  transform: none;
}

.hero-claim {
  font-size: clamp(1.2rem, 2.4vw, 1.65rem);
  font-weight: 600;
  max-width: 28ch;
  margin-bottom: 0.85rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease) 0.12s, transform 0.8s var(--ease) 0.12s;
}

.hero.is-ready .hero-claim {
  opacity: 1;
  transform: none;
}

.hero-support {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.05rem;
  max-width: 38ch;
  margin-bottom: 1.75rem;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s var(--ease) 0.22s, transform 0.8s var(--ease) 0.22s;
}

.hero.is-ready .hero-support {
  opacity: 1;
  transform: none;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transition: opacity 0.8s var(--ease) 0.32s;
}

.hero.is-ready .hero-cta {
  opacity: 1;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 1;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Scrolly chapters */
.story {
  background: var(--sand);
}

.chapter {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) 1.4fr;
  gap: 2rem;
  min-height: 100vh;
  padding: 4rem 0;
  align-items: start;
}

.chapter-sticky {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
  align-self: start;
  padding-right: 1rem;
}

.chapter-year {
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--navy);
  line-height: 1;
  margin: 0.4rem 0 0.75rem;
}

.chapter-title {
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--navy);
  margin-bottom: 0.75rem;
}

.chapter-lede {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 28ch;
}

.chapter-body {
  padding-top: 0.5rem;
}

.chapter-copy {
  font-size: 1.15rem;
  max-width: 42ch;
  margin-bottom: 1.5rem;
}

.chapter-copy strong {
  color: var(--navy);
}

.chapter-visual {
  border-radius: 0;
  overflow: hidden;
  min-height: 280px;
  background: var(--navy);
}

.chapter-visual img,
.chapter-visual object {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

.chapter-visual--diagram {
  background: var(--navy);
  padding: 0;
}

.chapter-visual--diagram img {
  object-fit: contain;
  min-height: 280px;
  padding: 1rem;
}

.chapter.is-active .chapter-sticky {
  color: var(--navy);
}

.chapter.is-active .chapter-year {
  color: var(--orange);
}

.rail {
  position: relative;
}

.rail::before {
  content: "";
  position: absolute;
  left: -1.25rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 2px;
  background: rgba(10, 37, 64, 0.15);
}

.chapter.is-active .rail::before {
  background: var(--orange);
}

/* Focus triad — not card dashboard; stacked bands */
.focus-band {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(10, 37, 64, 0.12);
}

.focus-band h3 {
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.5rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.focus-band p {
  color: var(--muted);
  max-width: 40ch;
}

/* Proof */
.proof {
  background: var(--navy);
  color: var(--white);
  padding: 5rem 0;
}

.proof .section-kicker {
  color: var(--orange);
}

.proof-title {
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0.5rem 0 2.5rem;
  max-width: 18ch;
}

.proof-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.proof-stat strong {
  display: block;
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  color: var(--orange);
  line-height: 1;
}

.proof-stat span {
  display: block;
  margin-top: 0.5rem;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
}

.awards-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.award-link {
  display: block;
  text-decoration: none;
  color: var(--white);
  padding: 1.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  transition: color 0.25s var(--ease);
}

.award-link:hover {
  color: var(--orange);
}

.award-link h3 {
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
}

.award-link p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.award-link .meta {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 0.4rem;
}

/* Philosophy */
.philosophy {
  padding: 5rem 0;
  background: var(--white);
}

.philosophy-title {
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--navy);
  margin: 0.5rem 0 2.5rem;
}

.phil-list {
  list-style: none;
  display: grid;
  gap: 2rem;
}

.phil-list li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.25rem;
  align-items: start;
  max-width: 52rem;
}

.phil-num {
  font-family: "Fraunces", Georgia, serif;
  font-size: 2rem;
  color: var(--orange);
  line-height: 1;
}

.phil-list h3 {
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.4rem;
  color: var(--navy);
  margin-bottom: 0.35rem;
}

.phil-list p {
  color: var(--muted);
  max-width: 48ch;
}

/* FAQ */
.faq {
  padding: 4rem 0 5rem;
  background: var(--sand);
}

.faq-title {
  font-family: "Fraunces", Georgia, serif;
  font-size: 2rem;
  color: var(--navy);
  margin: 0.5rem 0 2rem;
}

.faq details {
  border-top: 1px solid rgba(10, 37, 64, 0.15);
  padding: 1.1rem 0;
}

.faq details:last-child {
  border-bottom: 1px solid rgba(10, 37, 64, 0.15);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--navy);
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq details p {
  margin-top: 0.75rem;
  color: var(--muted);
  max-width: 60ch;
}

/* Connect */
.connect {
  padding: 5rem 0;
  background: var(--navy);
  color: var(--white);
}

.connect-title {
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0.5rem 0 1rem;
}

.connect-text {
  color: rgba(255, 255, 255, 0.78);
  max-width: 40ch;
  margin-bottom: 2rem;
}

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 2rem;
}

.social-row a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid transparent;
}

.social-row a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.connect-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.footer {
  background: #071828;
  color: rgba(255, 255, 255, 0.55);
  padding: 1.5rem 0;
  font-size: 0.9rem;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@media (max-width: 900px) {
  .chapter {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 3rem 0;
  }

  .chapter-sticky {
    position: static;
  }

  .rail::before {
    display: none;
  }

  .proof-stats,
  .awards-row,
  .focus-band {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    display: none;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 37, 64, 0.97);
    padding: 1rem 1.25rem 1.5rem;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .proof-stats,
  .awards-row,
  .focus-band {
    grid-template-columns: 1fr;
  }

  .phil-list li {
    grid-template-columns: 2.5rem 1fr;
  }

  .hero-content {
    padding-bottom: 5rem;
  }
}