/* ─────────────────────────────────────────────
   PRODUCT.SRAVISY.COM — main.css
   Ultra-minimal · White · Editorial · DM Sans
───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,200;0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,200;1,9..40,300&display=swap');

/* ── TOKENS ─────────────────────────────────── */
:root {
  --black:   #0a0a0a;
  --white:   #ffffff;
  --off:     #f4f4f2;
  --ink-60:  rgba(10,10,10,.60);
  --ink-35:  rgba(10,10,10,.35);
  --ink-15:  rgba(10,10,10,.15);
  --ink-07:  rgba(10,10,10,.07);

  --f:       'DM Sans', system-ui, sans-serif;

  --nav-h:   56px;
  --g:       clamp(24px, 5vw, 80px);
  --max:     1280px;
  --ease:    cubic-bezier(.16,1,.3,1);
}

/* ── RESET ───────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--f);
  background:var(--white);
  color:var(--ink-60);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{border:none;background:none;cursor:pointer;font:inherit}

/* ── UTILITIES ───────────────────────────────── */
.label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-35);
}
.tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-35);
  border: 1px solid var(--ink-15);
  padding: 4px 10px;
  border-radius: 2px;
}
.link-arrow {
  font-size: 13px;
  font-weight: 400;
  color: var(--black);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--ink-15);
  padding-bottom: 1px;
  transition: border-color .2s;
}
.link-arrow:hover { border-color: var(--black); }

/* ── NAV ─────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ink-07);
  z-index: 100;
  transition: border-color .3s;
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--g);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav__logo {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--black);
  flex-shrink: 0;
}
.nav__logo-dot { color: var(--ink-35); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
}
.nav__link {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--ink-60);
  transition: color .15s;
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--black);
  transition: width .2s var(--ease);
}
.nav__link:hover { color: var(--black); }
.nav__link:hover::after { width: 100%; }
.nav__link.is-active { color: var(--black); }
.nav__link.is-active::after { width: 100%; }
.nav__back {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-35);
  margin-left: auto;
  letter-spacing: .04em;
  transition: color .2s;
}
.nav__back:hover { color: var(--black); }
@media(max-width:600px){
  .nav__back { display: none; }
  .nav__links { gap: 20px; }
}

/* ── HERO ─────────────────────────────────────── */
.hero {
  min-height: 100svh;
  padding-top: var(--nav-h);
  display: flex;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--ink-07);
}
.hero__inner {
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 80px var(--g) 80px;
  position: relative;
  z-index: 2;
}
.hero__meta {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}
.hero__title {
  font-size: clamp(3.6rem, 9vw, 9rem);
  font-weight: 200;
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--black);
  margin-bottom: 40px;
}
.hero__title-line { display: block; overflow: hidden; }
.hero__title-line span {
  display: block;
  transform: translateY(105%);
  transition: transform .9s var(--ease);
}
.hero__title-line--indent { padding-left: clamp(40px, 8vw, 120px); }
.hero__title-line:nth-child(1) span { transition-delay: .05s; }
.hero__title-line:nth-child(2) span { transition-delay: .12s; }
.hero__title-line:nth-child(3) span { transition-delay: .19s; }
.hero.loaded .hero__title-line span { transform: translateY(0); }

.hero__sub {
  font-size: clamp(14px, 1.6vw, 17px);
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-60);
  max-width: 480px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .8s .5s, transform .8s var(--ease) .5s;
}
.hero.loaded .hero__sub { opacity: 1; transform: translateY(0); }

.hero__scroll {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 64px;
  opacity: 0;
  transition: opacity .6s 1s;
}
.hero.loaded .hero__scroll { opacity: 1; }
.hero__scroll-line {
  width: 40px; height: 1px;
  background: var(--ink-15);
  flex-shrink: 0;
}
.hero__scroll-label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-35);
}

/* Large background number */
.hero__num {
  position: absolute;
  right: -0.02em; bottom: -0.1em;
  font-size: clamp(10rem, 28vw, 28rem);
  font-weight: 200;
  letter-spacing: -.06em;
  color: var(--ink-07);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

/* ── CASES LIST ───────────────────────────────── */
.cases { border-bottom: 1px solid var(--ink-07); }

.case {
  border-top: 1px solid var(--ink-07);
  transition: background .25s;
}
.case:hover { background: var(--off); }

.case__link {
  display: block;
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px var(--g);
}

.case__header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.case__num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--ink-35);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.case__tags { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.case__year {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-35);
  margin-left: auto;
}

.case__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
@media(max-width:768px){
  .case__body { grid-template-columns: 1fr; }
  .case__visual { order: -1; }
}

.case__title {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 300;
  letter-spacing: -.03em;
  color: var(--black);
  line-height: 1.1;
  margin-bottom: 8px;
}
.case__client {
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-35);
  letter-spacing: .04em;
  margin-bottom: 20px;
}
.case__desc {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--ink-60);
  margin-bottom: 28px;
  max-width: 440px;
}
.case__cta {
  font-size: 12px;
  font-weight: 400;
  color: var(--black);
  letter-spacing: .06em;
  border-bottom: 1px solid var(--ink-15);
  padding-bottom: 1px;
  transition: border-color .2s;
}
.case:hover .case__cta { border-color: var(--black); }

.case__visual {
  position: relative;
}
.case__img-wrap {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--off);
}
.case__img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(.15);
  transition: transform .7s var(--ease), filter .4s;
}
.case:hover .case__img-wrap img {
  transform: scale(1.03);
  filter: grayscale(0);
}

/* ── ABOUT STRIP ──────────────────────────────── */
.strip {
  border-top: 1px solid var(--ink-07);
  background: var(--black);
}
.strip__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 80px var(--g);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
@media(max-width:768px){
  .strip__inner { grid-template-columns: 1fr; gap: 40px; }
}
.strip__left .label { color: rgba(255,255,255,.3); margin-bottom: 24px; display: block; }
.strip__title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 200;
  letter-spacing: -.03em;
  color: #fff;
  line-height: 1.15;
}
.strip__body {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.8;
  color: rgba(255,255,255,.45);
  margin-bottom: 16px;
}
.strip__right .link-arrow {
  color: rgba(255,255,255,.55);
  border-color: rgba(255,255,255,.2);
  margin-top: 24px;
}
.strip__right .link-arrow:hover {
  color: #fff;
  border-color: rgba(255,255,255,.5);
}

/* ── PAGE HERO (inner pages) ──────────────────── */
.page-hero {
  padding-top: calc(var(--nav-h) + 80px);
  padding-bottom: 72px;
  border-bottom: 1px solid var(--ink-07);
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--g);
  padding-right: var(--g);
}
.page-hero .label { display: block; margin-bottom: 20px; }
.page-hero__title {
  font-size: clamp(2.4rem, 6vw, 6rem);
  font-weight: 200;
  letter-spacing: -.04em;
  color: var(--black);
  line-height: 1.0;
}

/* ── ABOUT PAGE ────────────────────────────────── */
.about-page { padding-bottom: 100px; }
.about-page__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--g);
}
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 80px;
  padding-top: 72px;
  align-items: start;
}
@media(max-width:900px){
  .about-grid { grid-template-columns: 1fr; }
}
.about-bio p {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-60);
  margin-bottom: 20px;
}
.about-bio strong { font-weight: 500; color: var(--black); }
.about-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 40px;
}

.about-sidebar { position: sticky; top: calc(var(--nav-h) + 32px); }
.about-block { margin-bottom: 36px; }
.about-block__label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-35);
  margin-bottom: 8px;
}
.about-block__val {
  font-size: 14px;
  font-weight: 400;
  color: var(--black);
  line-height: 1.4;
}
.about-block__sub {
  font-size: 12px;
  font-weight: 300;
  color: var(--ink-60);
  margin-top: 2px;
}
.skill-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.skill {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-60);
  background: var(--off);
  padding: 4px 10px;
  border-radius: 2px;
}

/* ── CASE STUDY PAGE ──────────────────────────── */
.cs-page { min-height: 100vh; }

.cs-hero {
  border-bottom: 1px solid var(--ink-07);
  background: var(--white);
}
.cs-hero__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: calc(var(--nav-h) + 60px) var(--g) 60px;
}
.cs-back {
  display: inline-block;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .08em;
  color: var(--ink-35);
  margin-bottom: 40px;
  transition: color .2s;
}
.cs-back:hover { color: var(--black); }
.cs-hero__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.cs-hero__num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--ink-35);
}
.cs-hero__tags { display: flex; gap: 6px; flex-wrap: wrap; }
.cs-hero__title {
  font-size: clamp(2.4rem, 6vw, 6rem);
  font-weight: 200;
  letter-spacing: -.04em;
  color: var(--black);
  line-height: 1.0;
  margin-bottom: 12px;
}
.cs-hero__client {
  font-size: 13px;
  font-weight: 300;
  color: var(--ink-35);
}

.cs-cover {
  width: 100%;
  max-height: 60vh;
  overflow: hidden;
  background: var(--off);
}
.cs-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-height: 60vh;
}
.cs-cover--placeholder {
  height: 40vh;
  background: var(--off);
}

.cs-body {
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--ink-07);
}
.cs-body__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--g);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 72px;
  align-items: start;
}
@media(max-width:768px){
  .cs-body__inner { grid-template-columns: 1fr; }
  .cs-sidebar { display: none; }
}

.cs-sidebar { position: sticky; top: calc(var(--nav-h) + 32px); }
.cs-meta-block { margin-bottom: 28px; }
.cs-meta-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-35);
  margin-bottom: 5px;
}
.cs-meta-val {
  font-size: 13px;
  font-weight: 300;
  color: var(--black);
  line-height: 1.6;
}

.cs-section { margin-bottom: 64px; }
.cs-section__label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-35);
  display: block;
  margin-bottom: 12px;
}
.cs-section__title {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 300;
  letter-spacing: -.025em;
  color: var(--black);
  line-height: 1.2;
  margin-bottom: 20px;
}
.cs-content p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-60);
  margin-bottom: 16px;
  max-width: 640px;
}

.cs-img-full {
  margin: 48px 0;
  max-width: var(--max);
  margin-left: auto; margin-right: auto;
}
.cs-img-full img {
  width: 100%;
  height: auto;
  background: var(--off);
}
.cs-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  margin: 48px 0;
}
@media(max-width:600px){ .cs-img-grid { grid-template-columns: 1fr; } }
.cs-img-grid__item img { width: 100%; background: var(--off); }
.cs-img-caption {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-35);
  letter-spacing: .04em;
  margin-top: 8px;
}

.cs-outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--ink-07);
  margin-top: 48px;
}
@media(max-width:600px){ .cs-outcomes { grid-template-columns: 1fr; } }
.cs-outcome {
  padding: 36px 28px;
  background: var(--off);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cs-outcome__num {
  font-size: 2.8rem;
  font-weight: 200;
  letter-spacing: -.04em;
  color: var(--black);
  line-height: 1;
}
.cs-outcome__label {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-35);
}

.cs-nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px var(--g);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.cs-nav__all {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-35);
  transition: color .2s;
}
.cs-nav__all:hover { color: var(--black); }
.cs-nav__next {
  font-size: 14px;
  font-weight: 300;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--ink-15);
  padding-bottom: 2px;
  transition: border-color .2s;
}
.cs-nav__next:hover { border-color: var(--black); }

/* ── FOOTER ───────────────────────────────────── */
.footer {
  border-top: 1px solid var(--ink-07);
  padding: 28px 0;
}
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--g);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer__copy {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-35);
  letter-spacing: .06em;
}
.footer__links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__links a {
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-35);
  letter-spacing: .06em;
  transition: color .2s;
}
.footer__links a:hover { color: var(--black); }

/* ── SCROLL REVEAL ────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .1s; }
.reveal-d2 { transition-delay: .2s; }
.reveal-d3 { transition-delay: .3s; }

/* ── MISC ─────────────────────────────────────── */
::selection { background: var(--black); color: var(--white); }
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-thumb { background: var(--ink-15); }