@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================================
   TOKENS
   ============================================================ */
:root {
  --bg:          #F7F6F3;
  --fg:          #111111;
  --fg-2:        #555555;
  --fg-3:        #999999;
  --border:      #E4E4DE;
  --white:       #FFFFFF;

  /* Project accent colours */
  --hdfc:        #1B3A6B;
  --hdfc-mid:    #4A7FDB;
  --hdfc-light:  #EEF2FA;

  --laf:         #9B7B3D;
  --laf-mid:     #C9A84C;
  --laf-light:   #FAF6EE;

  --bigul:       #007A5E;
  --bigul-mid:   #00C896;
  --bigul-light: #E6FAF5;

  --myt:         #8B6914;
  --myt-mid:     #D4A843;
  --myt-light:   #F5F0E6;

  /* Type */
  --serif: 'DM Serif Display', Georgia, serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Easing */
  --ease:    cubic-bezier(0.16, 1, 0.3, 1);

  /* Radii */
  --r:   12px;
  --r-lg: 20px;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 { font-family: var(--serif); font-size: clamp(52px, 7vw, 96px); line-height: 1.0; font-weight: 400; }
h2 { font-family: var(--serif); font-size: clamp(36px, 4.5vw, 60px); line-height: 1.1; font-weight: 400; }
h3 { font-family: var(--serif); font-size: clamp(22px, 2.5vw, 32px); line-height: 1.2; font-weight: 400; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 48px;
}
@media (max-width: 768px) { .container { padding: 0 24px; } }

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: rgba(247, 246, 243, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
nav.scrolled { border-bottom-color: var(--border); }

.nav-logo {
  font-family: var(--serif);
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--fg-2);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--fg); }

.nav-back {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--fg-2);
  transition: color 0.2s;
}
.nav-back:hover { color: var(--fg); }
.nav-back svg { transition: transform 0.2s var(--ease); }
.nav-back:hover svg { transform: translateX(-3px); }

@media (max-width: 768px) {
  nav { padding: 16px 24px; }
}

/* ============================================================
   HOME — HERO
   ============================================================ */
.home-hero {
  padding: 160px 0 80px;
}

.home-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 64px;
  align-items: end;
}

.hero-eyebrow {
  color: var(--fg-3);
  margin-bottom: 20px;
}

.home-hero h1 { margin-bottom: 24px; }
.home-hero h1 em { font-style: italic; }

.hero-tagline {
  font-size: 18px;
  color: var(--fg-2);
  line-height: 1.7;
  max-width: 400px;
}

.hero-aside {
  padding-bottom: 8px;
}

.hero-aside-label {
  color: var(--fg-3);
  margin-bottom: 8px;
}

.hero-aside p {
  font-size: 15px;
  color: var(--fg-2);
  line-height: 1.7;
  margin-bottom: 20px;
}

.hero-email-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
  border-bottom: 1.5px solid var(--border);
  padding-bottom: 4px;
  transition: border-color 0.2s;
}
.hero-email-link:hover { border-color: var(--fg); }

@media (max-width: 860px) {
  .home-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ============================================================
   HOME — PROJECT CARDS
   ============================================================ */
.work-section {
  padding: 64px 0 120px;
  border-top: 1px solid var(--border);
}

.section-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 64px;
}
.section-meta .label { color: var(--fg-3); }
.section-meta-divider { color: var(--border); }

.project-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: opacity 0.2s;
}
.project-card:first-of-type { border-top: 1px solid var(--border); }
.project-card:hover { opacity: 0.88; }

/* Alternate card direction */
.project-card.reverse { direction: rtl; }
.project-card.reverse > * { direction: ltr; }

.card-no {
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-3);
  margin-bottom: 16px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid;
}

/* Tag colours per project */
.tag-hdfc   { color: var(--hdfc);  border-color: color-mix(in srgb, var(--hdfc) 30%, transparent);  background: color-mix(in srgb, var(--hdfc) 7%, transparent); }
.tag-laf    { color: var(--laf);   border-color: color-mix(in srgb, var(--laf) 30%, transparent);   background: color-mix(in srgb, var(--laf) 7%, transparent); }
.tag-bigul  { color: var(--bigul); border-color: color-mix(in srgb, var(--bigul) 30%, transparent); background: color-mix(in srgb, var(--bigul) 7%, transparent); }
.tag-myt    { color: var(--myt);   border-color: color-mix(in srgb, var(--myt) 30%, transparent);   background: color-mix(in srgb, var(--myt) 7%, transparent); }

.card-title { margin-bottom: 16px; }

.card-desc {
  font-size: 16px;
  color: var(--fg-2);
  line-height: 1.75;
  max-width: 420px;
  margin-bottom: 28px;
}

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}
.card-cta svg { transition: transform 0.25s var(--ease); }
.project-card:hover .card-cta svg { transform: translate(3px, -3px); }

.cta-hdfc  { color: var(--hdfc); }
.cta-laf   { color: var(--laf); }
.cta-bigul { color: var(--bigul); }
.cta-myt   { color: var(--myt); }

/* Visual wrapper */
.card-visual {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-visual svg { width: 100%; height: 100%; }

.v-hdfc  { background: var(--hdfc-light); }
.v-laf   { background: var(--laf-light); }
.v-bigul { background: #0D1B2A; }
.v-myt   { background: #111009; }

@media (max-width: 900px) {
  .project-card,
  .project-card.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 32px;
  }
  .card-visual { aspect-ratio: 16/9; }
}

/* ============================================================
   CASE STUDY — HERO
   ============================================================ */
.cs-hero {
  padding: 140px 0 72px;
}

.cs-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.cs-eyebrow .label { color: var(--fg-3); }

.cs-hero h1 { margin-bottom: 20px; }

.cs-subtitle {
  font-size: 20px;
  color: var(--fg-2);
  line-height: 1.65;
  max-width: 620px;
  margin-bottom: 48px;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cs-meta-item { display: flex; flex-direction: column; gap: 4px; }
.cs-meta-item .label { color: var(--fg-3); }
.cs-meta-item .val { font-size: 15px; font-weight: 500; }

/* Full-width mockup visual */
.cs-visual-band {
  margin: 56px 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  width: 100%;
}
.cs-visual-band svg { width: 100%; display: block; }

/* ============================================================
   CASE STUDY — BODY
   ============================================================ */
.cs-body {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 0;
}

.cs-section { margin-bottom: 80px; }
.cs-section:last-child { margin-bottom: 0; }

.cs-section-label { margin-bottom: 16px; }

.cs-section h3 { margin-bottom: 16px; }

.cs-section p {
  font-size: 17px;
  line-height: 1.85;
  color: var(--fg-2);
  margin-bottom: 20px;
}
.cs-section p:last-child { margin-bottom: 0; }

/* Pull quote */
.cs-pullquote {
  border-left: 3px solid;
  padding: 20px 28px;
  margin: 32px 0;
  border-radius: 0 var(--r) var(--r) 0;
}
.cs-pullquote p {
  font-family: var(--serif);
  font-size: 21px !important;
  line-height: 1.5 !important;
  color: var(--fg) !important;
  margin: 0 !important;
}

/* Decision cards */
.cs-decisions { display: grid; gap: 24px; margin: 40px 0; }

.cs-decision {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  align-items: start;
  padding: 28px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  background: var(--white);
}

.dec-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 18px;
  flex-shrink: 0;
}

.dec-body h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}
.dec-body p {
  font-size: 15px !important;
  margin: 0 !important;
  line-height: 1.7 !important;
}

/* Decision number colours */
.dec-hdfc  { background: var(--hdfc-light); color: var(--hdfc); }
.dec-laf   { background: var(--laf-light);  color: var(--laf); }
.dec-bigul { background: var(--bigul-light); color: var(--bigul); }
.dec-myt   { background: var(--myt-light);  color: var(--myt); }

/* Outcome stats */
.cs-outcomes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 32px 0;
}

.outcome-card {
  border-radius: var(--r);
  padding: 28px 20px;
  text-align: center;
}
.outcome-num {
  font-family: var(--serif);
  font-size: 44px;
  line-height: 1;
  margin-bottom: 8px;
}
.outcome-desc {
  font-size: 13px;
  color: var(--fg-2);
  line-height: 1.5;
}

@media (max-width: 680px) {
  .cs-outcomes { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   IMPACT BAR
   ============================================================ */
.impact-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin: 48px 0;
  background: var(--white);
}

.impact-item {
  padding: 32px 24px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.impact-item:last-child { border-right: none; }

.impact-val {
  font-family: var(--serif);
  font-size: 36px;
  line-height: 1;
  color: var(--fg);
  margin-bottom: 8px;
}

.impact-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .impact-bar { grid-template-columns: 1fr 1fr; }
  .impact-item:nth-child(2) { border-right: none; }
  .impact-item:nth-child(1),
  .impact-item:nth-child(2) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 480px) {
  .impact-bar { grid-template-columns: 1fr 1fr; }
  .impact-val { font-size: 28px; }
}

/* ============================================================
   STICKY ANCHOR NAV
   ============================================================ */
.cs-anchor-nav {
  position: sticky;
  top: 64px;
  z-index: 90;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0;
  margin-bottom: 0;
}

.anchor-links {
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.anchor-links::-webkit-scrollbar { display: none; }

.anchor-link {
  flex-shrink: 0;
  padding: 16px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-3);
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.anchor-link:hover { color: var(--fg); }
.anchor-link.active {
  color: var(--fg);
  border-bottom-color: var(--project, var(--fg));
}

/* Wide visual insert (breaks out of body width) */
.cs-wide-visual {
  max-width: 1000px;
  margin: 0 auto 80px;
  border-radius: var(--r-lg);
  overflow: hidden;
}
.cs-wide-visual svg { width: 100%; display: block; }

/* ============================================================
   NDA / CTA BLOCK
   ============================================================ */
.nda-block {
  background: var(--fg);
  border-radius: var(--r-lg);
  padding: 80px 48px;
  text-align: center;
  margin: 80px 0 40px;
}

.nda-eyebrow { color: rgba(255,255,255,0.4); margin-bottom: 20px; }

.nda-block h3 { color: var(--white); margin-bottom: 16px; }

.nda-block p {
  color: rgba(255,255,255,0.6);
  font-size: 16px;
  line-height: 1.75;
  max-width: 460px;
  margin: 0 auto 36px;
}

.nda-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  background: var(--white);
  color: var(--fg);
  transition: transform 0.2s, background 0.2s;
}
.nda-cta:hover { background: var(--bg); transform: translateY(-2px); }

@media (max-width: 600px) {
  .nda-block { padding: 56px 28px; }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-text { font-size: 13px; color: var(--fg-3); }
.footer-links { display: flex; gap: 28px; }
.footer-links a {
  font-size: 13px;
  color: var(--fg-3);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--fg); }

@media (max-width: 600px) {
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.fade-up.visible { opacity: 1; transform: none; }
.d1 { transition-delay: 0.08s; }
.d2 { transition-delay: 0.16s; }
.d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; }