/* Chawla Labs — design tokens & layout */

:root {
  --ink: #12151a;
  --ink-soft: #2a3038;
  --paper: #f3efe6;
  --paper-muted: #e4ddd0;
  --foam: #faf8f4;
  --accent: #1f6b5c;
  --accent-deep: #134a40;
  --accent-glow: rgba(31, 107, 92, 0.35);
  --line: rgba(255, 255, 255, 0.55);
  --line-dark: rgba(18, 21, 26, 0.12);
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(12, 16, 22, 0.28);

  --font-display: "Cormorant Garamond", "Times New Roman", serif;
  --font-sans: "DM Sans", "Segoe UI", sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 4.5rem;
  --max: 68rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--foam);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1,
h2,
h3,
p {
  margin: 0;
}

.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: -3rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--white);
  color: var(--ink);
  border-radius: 0.4rem;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: var(--header-h);
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  color: var(--white);
  transition: background 0.35s var(--ease), color 0.35s var(--ease),
    box-shadow 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}

.site-header.is-solid {
  background: rgba(250, 248, 244, 0.92);
  color: var(--ink);
  box-shadow: 0 1px 0 var(--line-dark);
  backdrop-filter: blur(12px);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.nav {
  display: none;
  gap: 1.75rem;
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a {
  opacity: 0.85;
  transition: opacity 0.2s var(--ease);
}

.nav a:hover,
.nav a:focus-visible {
  opacity: 1;
}

.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  opacity: 0.95;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.site-header.is-solid .nav-cta:hover,
.nav-cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}

/* Left social rail — hidden */

.social-rail {
  display: none !important;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }
}

/* Hero */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  color: var(--white);
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  transform: scale(1.04);
  animation: hero-drift 28s var(--ease) infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      rgba(10, 14, 20, 0.55) 0%,
      rgba(10, 14, 20, 0.35) 38%,
      rgba(10, 14, 20, 0.72) 72%,
      rgba(10, 14, 20, 0.9) 100%
    ),
    radial-gradient(
      ellipse 80% 55% at 50% 20%,
      rgba(20, 40, 50, 0.15),
      transparent 70%
    );
}

.hero-content {
  width: min(100% - 2.5rem, 42rem);
  text-align: center;
  padding: calc(var(--header-h) + 2rem) 0 5rem;
}

.brand {
  font-family: var(--font-sans);
  font-size: clamp(2.8rem, 9vw, 5.5rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
  padding: 0.45rem 0 0.95rem;
}

.brand::before,
.brand::after {
  content: "";
  position: absolute;
  left: 50%;
  width: min(100%, 22rem);
  height: 1px;
  border-top: 1px dashed var(--line);
  transform: translateX(-50%);
}

.brand::before {
  top: 0;
}

.brand::after {
  bottom: 0;
}

.lede {
  max-width: 32rem;
  margin: 0 auto 2rem;
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.88);
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.85rem;
  padding: 0.7rem 1.35rem;
  border-radius: 0.35rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
    border-color 0.25s var(--ease), color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 10px 30px var(--accent-glow);
}

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

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.8);
}

.btn-ghost-ink {
  color: var(--ink);
  border-color: var(--line-dark);
}

.btn-ghost-ink:hover {
  background: rgba(18, 21, 26, 0.05);
  border-color: var(--ink);
}

.btn-wide {
  width: 100%;
}

.scroll-cue {
  position: absolute;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  width: 1.4rem;
  height: 2.2rem;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
}

.scroll-cue span {
  display: block;
  width: 0.28rem;
  height: 0.28rem;
  margin: 0.4rem auto 0;
  border-radius: 50%;
  background: var(--white);
  animation: cue-fall 1.8s var(--ease) infinite;
}

/* Sections */

.section {
  padding: clamp(4.5rem, 10vw, 7.5rem) 0;
  position: relative;
}

.section-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.section-head {
  max-width: 36rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.section-head.light {
  color: var(--white);
  text-align: center;
  margin-inline: auto;
}

.eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin-bottom: 0.85rem;
}

.section-head p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-head.light p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.1rem;
}

/* Apps */

.apps {
  background:
    linear-gradient(180deg, #ebe4d6 0%, var(--paper) 45%, var(--foam) 100%);
  padding-bottom: clamp(2rem, 4vw, 3rem);
}

.work-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-dark);
}

.work-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.5rem;
  align-items: start;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line-dark);
  transition: background 0.3s var(--ease);
}

a.work-item-link {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  border-radius: 0.35rem;
  margin: 0 -0.75rem;
  padding-inline: 0.75rem;
}

a.work-item-link:hover,
a.work-item-link:focus-visible {
  background: rgba(255, 255, 255, 0.45);
}

a.work-item-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a.work-item-link:hover h3,
a.work-item-link:focus-visible h3 {
  color: var(--accent-deep);
}

.work-item:hover {
  background: rgba(255, 255, 255, 0.35);
}

a.work-item-link:hover {
  background: rgba(255, 255, 255, 0.45);
}

.work-index {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--accent);
  line-height: 1.4;
  min-width: 2rem;
}

.work-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
  transition: color 0.2s var(--ease);
}

.work-body p {
  color: var(--ink-soft);
  max-width: 38rem;
}

.work-meta {
  grid-column: 2;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
  opacity: 0.75;
}

.work-meta-link {
  opacity: 1;
  transition: color 0.2s var(--ease), opacity 0.2s var(--ease);
}

.work-meta-link:hover,
.work-meta-link:focus-visible {
  color: var(--accent);
}

@media (min-width: 720px) {
  .work-item {
    grid-template-columns: auto 1fr auto;
    align-items: center;
  }

  .work-meta {
    grid-column: auto;
  }
}

/* Open source */

.open-source {
  background:
    radial-gradient(ellipse 70% 50% at 100% 0%, rgba(31, 107, 92, 0.08), transparent),
    var(--foam);
  padding-top: clamp(2rem, 4vw, 3rem);
}

.oss-list {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 800px) {
  .oss-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.oss-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.6rem 0 0.25rem;
  border-top: 2px solid var(--ink);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.oss-link:hover,
.oss-link:focus-visible {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.oss-link h3 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.oss-link p {
  color: var(--ink-soft);
  flex: 1;
  margin-bottom: 1.25rem;
  font-size: 0.98rem;
}

.oss-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Contact */

.contact {
  padding: 0;
  min-height: 100svh;
  display: grid;
  place-items: center;
  color: var(--white);
  overflow: hidden;
}

.contact-backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.contact-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  filter: saturate(0.9);
}

.contact-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(8, 12, 18, 0.78) 0%,
    rgba(8, 12, 18, 0.82) 50%,
    rgba(8, 12, 18, 0.9) 100%
  );
}

.contact-inner {
  width: min(100% - 2.5rem, 58rem);
  padding: clamp(5rem, 12vw, 7rem) 0;
  display: grid;
  gap: 2.5rem 3.5rem;
  align-items: center;
}

@media (min-width: 800px) {
  .contact-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

.contact-copy {
  justify-self: stretch;
}

.contact-copy .section-head {
  text-align: left;
  margin-inline: 0;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-social {
  justify-self: stretch;
  align-self: center;
  margin: 0.5rem 0 0.5rem 0.75rem;
  padding: 1.35rem 1.35rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 0.65rem;
  background: rgba(8, 12, 18, 0.28);
}

.contact-social-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1.25rem;
}

.contact-social-list {
  display: grid;
  gap: 0.85rem;
}

.contact-social-list a {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 0.5rem;
  background: rgba(8, 12, 18, 0.3);
  color: var(--white);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.contact-social-list a:hover,
.contact-social-list a:focus-visible {
  background: rgba(8, 12, 18, 0.5);
  border-color: rgba(255, 255, 255, 0.75);
  transform: translateY(-2px);
}

.social-icon {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  flex-shrink: 0;
  border-radius: 0.4rem;
  background: rgba(255, 255, 255, 0.1);
}

.social-text {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}

.social-text strong {
  font-size: 1rem;
  font-weight: 600;
}

.social-text span {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  font: inherit;
  color: var(--white);
  background: rgba(8, 12, 18, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 0.45rem;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(255, 255, 255, 0.65);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--white);
  background: rgba(8, 12, 18, 0.5);
}

.field textarea {
  resize: vertical;
  min-height: 7rem;
}

.form-status {
  text-align: center;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
}

.form-status.is-visible {
  display: block;
}

/* Footer */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 1.5rem clamp(1.25rem, 4vw, 3rem);
  background: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 3.25rem;
}

.social-links a {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.2s var(--ease);
}

.social-links a:hover,
.social-links a:focus-visible {
  color: var(--white);
}

.footer-note {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 600;
  opacity: 0.7;
}

/* Motion */

[data-reveal] {
  opacity: 0;
  transform: translateY(1.1rem);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

.hero [data-reveal]:nth-child(1) {
  transition-delay: 0.05s;
}
.hero [data-reveal]:nth-child(2) {
  transition-delay: 0.18s;
}
.hero [data-reveal]:nth-child(3) {
  transition-delay: 0.3s;
}
.hero [data-reveal]:nth-child(4) {
  transition-delay: 0.42s;
}

.work-list > li[data-reveal].is-visible:nth-child(1) {
  transition-delay: 0.05s;
}
.work-list > li[data-reveal].is-visible:nth-child(2) {
  transition-delay: 0.12s;
}
.work-list > li[data-reveal].is-visible:nth-child(3) {
  transition-delay: 0.2s;
}
.work-list > li[data-reveal].is-visible:nth-child(4) {
  transition-delay: 0.28s;
}

.oss-list li[data-reveal].is-visible:nth-child(1) {
  transition-delay: 0.05s;
}
.oss-list li[data-reveal].is-visible:nth-child(2) {
  transition-delay: 0.12s;
}
.oss-list li[data-reveal].is-visible:nth-child(3) {
  transition-delay: 0.2s;
}

@keyframes hero-drift {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.1) translate3d(0, -1.5%, 0);
  }
}

@keyframes cue-fall {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  70% {
    opacity: 0;
    transform: translateY(0.85rem);
  }
  100% {
    opacity: 0;
    transform: translateY(0.85rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .hero-media img {
    transform: none;
  }
}

/* App detail pages */

body.page-app {
  background: var(--foam);
}

body.page-app .site-header {
  background: rgba(250, 248, 244, 0.94);
  color: var(--ink);
  box-shadow: 0 1px 0 var(--line-dark);
  backdrop-filter: blur(12px);
}

.app-page {
  padding: calc(var(--header-h) + 3rem) 0 5rem;
}

.app-page-inner {
  width: min(100% - 2.5rem, 44rem);
  margin-inline: auto;
}

.app-crumb {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
}

.app-crumb a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  text-decoration-color: transparent;
  transition: text-decoration-color 0.2s var(--ease);
}

.app-crumb a:hover,
.app-crumb a:focus-visible {
  text-decoration-color: currentColor;
}

.app-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.app-page h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.app-lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 36rem;
  margin-bottom: 1.75rem;
}

.app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.app-page .btn-primary:focus-visible {
  outline-color: var(--accent);
}

.app-block {
  margin-bottom: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line-dark);
}

.app-block h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.app-block p {
  color: var(--ink-soft);
  margin-bottom: 0.85rem;
}

.app-features {
  display: grid;
  gap: 0.85rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.app-features li {
  padding-left: 1.15rem;
  position: relative;
  color: var(--ink-soft);
}

.app-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--accent);
}

.app-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

.app-table th,
.app-table td {
  text-align: left;
  padding: 0.7rem 0.65rem;
  border-bottom: 1px solid var(--line-dark);
}

.app-table th {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.app-table td {
  color: var(--ink-soft);
}

.app-back {
  margin-top: 1rem;
}