/* ==========================================================
   YARIA GROUP — Design System (Dark / Light themes)
   Base palette: charcoal #171918 / ivory #F3F1EB / off-white #FAF9F6
   sage #59695B / bronze #B79C72 / graphite #252725 / gray #747774
   Type: Manrope (sans) + Instrument Serif (editorial)

   Theme switch: <html data-theme="dark"> ya <html data-theme="light">
   ========================================================== */

:root,
html[data-theme="dark"] {
  --bronze: #B79C72;
  --sage: #59695B;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --sans: 'Manrope', -apple-system, sans-serif;
  --serif: 'Instrument Serif', Georgia, serif;

  /* Dark theme tokens */
  --bg-a: #171918;              /* main section bg */
  --bg-b: #1d201e;              /* alternate section bg */
  --bg-em: #101211;             /* emphasis sections (philosophy / tech / contact) */
  --bg-footer: #0b0d0c;
  --heading: #F3F1EB;
  --text-strong: #F3F1EB;
  --text-body: rgba(243, 241, 235, 0.62);
  --line-c: rgba(243, 241, 235, 0.14);
  --eyebrow-c: #B79C72;
  --btn-solid-bg: #F3F1EB;
  --btn-solid-text: #171918;
  --btn-solid-hover: #B79C72;
  --header-bg: rgba(23, 25, 24, 0.94);
  --menu-bg: #171918;
  --node-shadow: rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] {
  --bg-a: #FAF9F6;
  --bg-b: #F3F1EB;
  --bg-em: #ECEAE2;
  --bg-footer: #E7E5DC;
  --heading: #171918;
  --text-strong: #252725;
  --text-body: #747774;
  --line-c: rgba(23, 25, 24, 0.13);
  --eyebrow-c: #59695B;
  --btn-solid-bg: #171918;
  --btn-solid-text: #F3F1EB;
  --btn-solid-hover: #59695B;
  --header-bg: rgba(250, 249, 246, 0.96);
  --menu-bg: #F3F1EB;
  --node-shadow: rgba(23, 25, 24, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg-a);
  color: var(--text-strong);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; background: none; border: none; cursor: pointer; color: inherit; }

.container { width: min(1240px, 92%); margin: 0 auto; }
.section {
  padding: clamp(90px, 12vw, 160px) 0;
  transition: background 0.5s var(--ease);
}
.section-dark { background: var(--bg-em); }

/* ---------- Typography ---------- */
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--eyebrow-c);
  font-weight: 600;
  margin-bottom: 22px;
}
.eyebrow-bronze { color: var(--bronze); }

.section-title {
  font-size: clamp(34px, 4.6vw, 60px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--heading);
  max-width: 18ch;
}
.statement {
  font-family: var(--serif);
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--heading);
}
.statement-serif {
  font-family: var(--serif);
  font-size: clamp(42px, 6vw, 84px);
  font-weight: 400;
  line-height: 1.08;
  color: var(--heading);
}
.body-copy {
  font-size: 17px;
  color: var(--text-body);
  max-width: 58ch;
  margin-top: 24px;
}
.body-on-dark { color: var(--text-body); }
.section-head { margin-bottom: clamp(48px, 6vw, 80px); }
.section-head-center { text-align: center; }
.section-head-center .section-title { margin: 0 auto; }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 16px 34px;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), border-color 0.4s var(--ease), transform 0.4s var(--ease);
}
.btn:hover { transform: translateY(-2px); }

/* Solid themed button (theme ke saath flip hota hai) */
.btn-solid { background: var(--btn-solid-bg); color: var(--btn-solid-text); }
.btn-solid:hover { background: var(--btn-solid-hover); color: #F3F1EB; }
html[data-theme="dark"] .btn-solid:hover { color: #171918; }

/* Ivory button — SIRF image-overlay sections ke liye (hero, partnership).
   Ye hamesha ivory rehta hai kyunki image pe dark overlay dono themes mein hai */
.btn-light { background: #F3F1EB; color: #171918; }
.btn-light:hover { background: var(--bronze); color: #171918; }
.btn-outline-light { border: 1px solid rgba(243, 241, 235, 0.55); color: #F3F1EB; }
.btn-outline-light:hover { border-color: #F3F1EB; background: rgba(243, 241, 235, 0.1); }

.btn-cta { background: var(--btn-solid-bg); color: var(--btn-solid-text); padding: 12px 26px; }
.btn-cta:hover { background: var(--btn-solid-hover); }

.link-arrow {
  display: inline-block;
  margin-top: 30px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-strong);
  position: relative;
  padding-bottom: 6px;
}
.link-arrow::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--bronze);
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.link-arrow:hover::after { transform: scaleX(1); }

/* ---------- Theme toggle (corner) ---------- */
.theme-toggle {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 150;
  display: flex;
  gap: 2px;
  padding: 4px;
  background: var(--bg-b);
  border: 1px solid var(--line-c);
  border-radius: 999px;
  box-shadow: 0 6px 24px var(--node-shadow);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease);
}
.theme-toggle button {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 18px;
  border-radius: 999px;
  color: var(--text-body);
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
.theme-toggle button.is-active {
  background: var(--btn-solid-bg);
  color: var(--btn-solid-text);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 26px 0;
  transition: background 0.5s var(--ease), padding 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.site-header.is-solid {
  background: var(--header-bg);
  padding: 14px 0;
  box-shadow: 0 1px 0 var(--line-c);
  backdrop-filter: blur(8px);
}
.header-inner {
  width: min(1360px, 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
}
.logo {
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 17px;
  color: #F3F1EB;
  transition: color 0.4s var(--ease);
}
.logo span { font-weight: 300; }
.site-header.is-solid .logo { color: var(--heading); }
.main-nav { margin-left: auto; display: flex; gap: 30px; }
.main-nav a {
  font-size: 14px;
  font-weight: 500;
  color: rgba(243, 241, 235, 0.85);
  position: relative;
  transition: color 0.4s var(--ease);
}

.logo img {
    width: 150px;
    height: auto;
    transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.site-header.is-solid .logo img {
    width: 80px;
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.main-nav a:hover::after { transform: scaleX(1); }
.site-header.is-solid .main-nav a { color: var(--text-strong); }
.header-cta { flex-shrink: 0; }
.site-header:not(.is-solid) .header-cta {
  background: rgba(243, 241, 235, 0.14);
  color: #F3F1EB;
  border: 1px solid rgba(243, 241, 235, 0.35);
}
.site-header:not(.is-solid) .header-cta:hover { background: #F3F1EB; color: #171918; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 7px;
  padding: 8px;
  margin-left: auto;
  z-index: 210;
}
.menu-toggle span {
  display: block;
  width: 28px; height: 2px;
  background: #F3F1EB;
  transition: transform 0.4s var(--ease), background 0.4s var(--ease);
}
.site-header.is-solid .menu-toggle span,
.menu-open .menu-toggle span { background: var(--heading); }
.menu-open .menu-toggle span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.menu-open .menu-toggle span:nth-child(2) { transform: translateY(-4.5px) rotate(-45deg); }

/* ---------- Mobile menu ---------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--menu-bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 8%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease), visibility 0.5s, background 0.5s var(--ease);
}
.menu-open .mobile-menu { opacity: 1; visibility: visible; }
.mobile-nav { display: flex; flex-direction: column; gap: 6px; }
.mobile-nav a {
  font-family: var(--serif);
  font-size: clamp(30px, 8vw, 44px);
  color: var(--heading);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.menu-open .mobile-nav a { opacity: 1; transform: translateY(0); }
.menu-open .mobile-nav a:nth-child(2) { transition-delay: 0.05s; }
.menu-open .mobile-nav a:nth-child(3) { transition-delay: 0.1s; }
.menu-open .mobile-nav a:nth-child(4) { transition-delay: 0.15s; }
.menu-open .mobile-nav a:nth-child(5) { transition-delay: 0.2s; }
.menu-open .mobile-nav a:nth-child(6) { transition-delay: 0.25s; }
.menu-open .mobile-nav a:nth-child(7) { transition-delay: 0.3s; }
.menu-open .mobile-nav a:nth-child(8) { transition-delay: 0.35s; }
.mobile-cta {
  font-family: var(--sans) !important;
  font-size: 15px !important;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bronze) !important;
  margin-top: 24px;
}
.mobile-menu-footer { position: absolute; bottom: 40px; font-size: 13px; color: var(--text-body); letter-spacing: 0.1em; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #F3F1EB;
}
.hero-slider { position: absolute; inset: 0; }
.hero-slide {
  position: absolute;
  inset: -6% 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  z-index: 0;
  transition: opacity 2s ease-in-out;
  animation: heroZoom 22s ease-in-out infinite alternate;
  will-change: opacity;
}
.hero-slide.is-active { opacity: 1; z-index: 2; }
.hero-slide.is-prev { opacity: 1; z-index: 1; transition: none; }
@keyframes heroZoom {
  from { transform: scale(1); }
  to { transform: scale(1.06); }
}
/* Darker layered overlay — content saaf dikhe */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  background:
    linear-gradient(to right, rgba(15, 17, 16, 0.62) 0%, rgba(15, 17, 16, 0.3) 65%, rgba(15, 17, 16, 0.2) 100%),
    linear-gradient(to bottom, rgba(15, 17, 16, 0.6) 0%, rgba(15, 17, 16, 0.45) 45%, rgba(15, 17, 16, 0.85) 100%);
}
.hero-content {
  position: relative;
  z-index: 4;
  width: min(1240px, 92%);
  margin: 0 auto;
  padding-top: 60px;
}
.hero-eyebrow { color: var(--bronze); }
.hero-title {
  font-family: var(--serif);
  font-size: clamp(38px, 6.4vw, 92px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.35);
}
.hero-title span { display: block; }
.hero-sub {
  margin-top: 30px;
  font-size: 17px;
  max-width: 54ch;
  color: rgba(243, 241, 235, 0.85);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
}
.hero-actions { margin-top: 42px; display: flex; gap: 18px; flex-wrap: wrap; }
.hero-meta {
  position: absolute;
  z-index: 4;
  bottom: 40px;
  left: 0; right: 0;
  width: min(1240px, 92%);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.hero-location { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(243,241,235,0.75); }
.hero-dots { display: flex; gap: 10px; }
.hero-dots button {
  width: 34px; height: 2px;
  background: rgba(243, 241, 235, 0.3);
  transition: background 0.4s var(--ease);
}
.hero-dots button.is-active { background: var(--bronze); }
.hero-scroll-hint {
  position: absolute;
  z-index: 4;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 52px;
  overflow: hidden;
}
.hero-scroll-hint span {
  display: block;
  width: 1px; height: 100%;
  background: rgba(243,241,235,0.6);
  animation: scrollHint 2.4s var(--ease) infinite;
}
@keyframes scrollHint {
  0% { transform: translateY(-100%); }
  55% { transform: translateY(0); }
  100% { transform: translateY(100%); }
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay { transition-delay: 0.15s; }

/* ---------- Image frames ---------- */
.img-frame { overflow: hidden; position: relative; }
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.001);
  transition: transform 1.2s var(--ease);
}
.img-frame:hover img { transform: scale(1.03); }
.img-frame-wide { aspect-ratio: 16 / 9; }
.img-frame-portrait { aspect-ratio: 4 / 5; }

/* ---------- Intro ---------- */
.intro { background: var(--bg-a); }
.intro-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: center;
}
.intro-line { width: 1px; height: 70px; background: var(--bronze); margin: 40px 0 18px; }
.intro-coords { font-size: 12px; letter-spacing: 0.14em; color: var(--text-body); text-transform: uppercase; }
.intro-media .img-frame { aspect-ratio: 4 / 5; }

/* ---------- Capabilities ---------- */
.capabilities { background: var(--bg-b); }
.cap-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(40px, 5vw, 90px);
  align-items: start;
}
.cap-item {
  display: flex;
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line-c);
  cursor: pointer;
  transition: padding-left 0.5s var(--ease);
}
.cap-item:first-child { border-top: 1px solid var(--line-c); }
.cap-item:hover, .cap-item.is-active { padding-left: 12px; }
.cap-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--bronze);
  min-width: 34px;
  padding-top: 4px;
}
.cap-body h3 { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; color: var(--heading); }
.cap-body p {
  font-size: 15px;
  color: var(--text-body);
  margin-top: 8px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.6s var(--ease), opacity 0.6s var(--ease);
}
.cap-item.is-active .cap-body p { max-height: 120px; opacity: 1; }
.cap-media { position: sticky; top: 110px; }
.cap-images { position: relative; aspect-ratio: 4 / 5; overflow: hidden; }
.cap-images img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 0.8s var(--ease), transform 1.4s var(--ease);
}
.cap-images img.is-active { opacity: 1; transform: scale(1); }

/* ---------- Developments ---------- */
.developments { background: var(--bg-a); }
.project {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
  margin-bottom: clamp(70px, 8vw, 120px);
}
.project:last-child { margin-bottom: 0; }
.project-alt .project-media { order: 2; }
.project-alt .project-info { order: 1; text-align: right; }
.project-alt .project-tags { justify-content: flex-end; }
.project-status {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bronze);
  font-weight: 700;
  margin-bottom: 16px;
}
.project-name { font-family: var(--serif); font-size: clamp(32px, 3.6vw, 48px); font-weight: 400; line-height: 1.1; color: var(--heading); }
.project-loc { font-size: 15px; color: var(--text-body); margin-top: 8px; }
.project-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.project-tags li {
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  border: 1px solid var(--line-c);
  color: var(--text-strong);
}

/* ---------- Philosophy (emphasis) ---------- */
.philosophy .section-head { max-width: 700px; }
.principles { border-top: 1px solid var(--line-c); }
.principle {
  display: block;
  width: 100%;
  text-align: left;
  border-bottom: 1px solid var(--line-c);
  padding: 26px 0;
  color: var(--heading);
}
.principle-head { display: flex; align-items: center; gap: 26px; }
.principle-num { font-size: 14px; color: var(--bronze); font-weight: 700; min-width: 32px; }
.principle-name { font-size: clamp(22px, 2.6vw, 32px); font-weight: 500; letter-spacing: -0.01em; }
.principle-icon {
  margin-left: auto;
  width: 14px; height: 14px;
  position: relative;
}
.principle-icon::before, .principle-icon::after {
  content: '';
  position: absolute;
  background: var(--bronze);
  transition: transform 0.4s var(--ease);
}
.principle-icon::before { left: 0; top: 6px; width: 14px; height: 2px; }
.principle-icon::after { left: 6px; top: 0; width: 2px; height: 14px; }
.principle[aria-expanded="true"] .principle-icon::after { transform: scaleY(0); }
.principle-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.6s var(--ease);
}
.principle-detail > span {
  overflow: hidden;
  font-size: 15px;
  color: var(--text-body);
  padding-left: 58px;
  max-width: 60ch;
}
.principle[aria-expanded="true"] .principle-detail { grid-template-rows: 1fr; }
.principle[aria-expanded="true"] .principle-detail > span { padding-top: 14px; }

/* ---------- Sustainability ---------- */
.sustainability { background: var(--bg-a); }
.sust-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
.sust-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 32px;
}
.sust-list li {
  font-size: 15px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-c);
  position: relative;
  padding-left: 20px;
  color: var(--text-strong);
}
.sust-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 26px;
  width: 8px; height: 1px;
  background: var(--eyebrow-c);
}

/* ---------- Technology (emphasis) ---------- */
.technology { position: relative; overflow: hidden; }
.tech-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  position: relative;
  z-index: 2;
}
.tech-list { list-style: none; }
.tech-list li {
  font-size: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-c);
  color: var(--text-strong);
  display: flex;
  align-items: center;
  gap: 14px;
}
.tech-list li::before {
  content: '';
  width: 6px; height: 6px;
  border: 1px solid var(--bronze);
  flex-shrink: 0;
}
.tech-lines { position: absolute; inset: 0; pointer-events: none; opacity: 0.35; }
.tech-lines span {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(183, 156, 114, 0.3), transparent);
}
.tech-lines span:nth-child(1) { left: 12%; }
.tech-lines span:nth-child(2) { left: 32%; }
.tech-lines span:nth-child(3) { left: 55%; }
.tech-lines span:nth-child(4) { left: 74%; }
.tech-lines span:nth-child(5) { left: 91%; }

/* ---------- Why Yaria ---------- */
.why { background: var(--bg-b); }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line-c);
  border: 1px solid var(--line-c);
}
.why-block { background: var(--bg-b); padding: 44px 36px; transition: background 0.5s var(--ease); }
.why-block:hover { background: var(--bg-a); }
.why-num { font-size: 14px; font-weight: 700; color: var(--bronze); }
.why-block h3 { font-size: 20px; font-weight: 600; margin-top: 18px; color: var(--heading); }
.why-block p { font-size: 15px; color: var(--text-body); margin-top: 10px; }

/* ---------- Leadership ---------- */
.leadership { background: var(--bg-a); }
.leader-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: center;
}
.leader-media .img-frame img { filter: grayscale(1); }
.leader-name { font-size: 24px; font-weight: 700; margin-top: 34px; letter-spacing: -0.01em; color: var(--heading); }
.leader-title {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  font-weight: 700;
  margin-top: 6px;
}

/* ---------- Ecosystem ---------- */
.ecosystem { background: var(--bg-b); }
.eco-diagram {
  position: relative;
  width: min(680px, 100%);
  aspect-ratio: 1;
  margin: 0 auto;
}
.eco-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.eco-svg line { stroke: var(--bronze); stroke-opacity: 0.35; stroke-width: 0.35; stroke-dasharray: 2 1.6; }
.eco-ring {
  position: absolute;
  inset: 12%;
  border: 1px solid var(--line-c);
  border-radius: 50%;
}
.eco-ring-outer {
  position: absolute;
  inset: 5%;
  border: 1px dashed rgba(183, 156, 114, 0.4);
  border-radius: 50%;
  animation: ecoSpin 60s linear infinite;
}
@keyframes ecoSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.eco-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(120px, 24%, 170px);
  aspect-ratio: 1;
  background: var(--btn-solid-bg);
  color: var(--btn-solid-text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: clamp(13px, 2vw, 16px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  transition: background 0.5s var(--ease), color 0.5s var(--ease);
}
.eco-center::after {
  content: '';
  position: absolute;
  inset: -10px;
  border: 1px solid rgba(183, 156, 114, 0.5);
  border-radius: 50%;
}
.eco-node {
  position: absolute;
  background: var(--bg-a);
  border: 1px solid var(--line-c);
  padding: 12px 18px 12px 30px;
  font-size: clamp(11px, 1.6vw, 14px);
  font-weight: 600;
  color: var(--text-strong);
  white-space: nowrap;
  transform: translate(-50%, -50%);
  box-shadow: 0 2px 14px var(--node-shadow);
  transition: border-color 0.4s var(--ease), color 0.4s var(--ease), transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.5s var(--ease);
}
.eco-node::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 50%;
  margin-top: -3px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--bronze);
  transition: transform 0.4s var(--ease);
}
.eco-node:hover {
  border-color: var(--bronze);
  transform: translate(-50%, -50%) translateY(-4px);
  box-shadow: 0 10px 26px var(--node-shadow);
}
.eco-node:hover::before { transform: scale(1.4); }
.eco-n1 { top: 9%; left: 50%; }
.eco-n2 { top: 34%; left: 89%; }
.eco-n3 { top: 82%; left: 76%; }
.eco-n4 { top: 82%; left: 24%; }
.eco-n5 { top: 34%; left: 11%; }
.eco-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-body);
  margin-top: 40px;
  font-style: italic;
}

/* ---------- Growth timeline ---------- */
.growth { background: var(--bg-a); }
.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line-c);
}
.stage {
  text-align: left;
  padding: 36px 28px 36px 28px;
  border-right: 1px solid var(--line-c);
  color: var(--text-strong);
  position: relative;
  transition: background 0.5s var(--ease);
}
.stage:first-child { padding-left: 0; }
.stage:last-child { border-right: none; }
.stage::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--bronze);
  transition: width 0.6s var(--ease);
}
.stage:hover::before, .stage[aria-expanded="true"]::before { width: 100%; }
.stage-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.stage-num { font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 700; color: var(--bronze); }
.stage-period { font-size: 12px; color: var(--text-body); }
.stage-name { display: block; font-size: 21px; font-weight: 600; margin-top: 16px; letter-spacing: -0.01em; color: var(--heading); }
.stage-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.6s var(--ease);
}
.stage-detail > span { overflow: hidden; font-size: 14px; color: var(--text-body); }
.stage[aria-expanded="true"] .stage-detail { grid-template-rows: 1fr; }
.stage[aria-expanded="true"] .stage-detail > span { padding-top: 14px; }

/* ---------- Partnership (image section — hamesha dark overlay) ---------- */
.partnership {
  position: relative;
  padding: clamp(120px, 16vw, 220px) 0;
  color: #F3F1EB;
  overflow: hidden;
}
.partnership-bg {
  position: absolute;
  inset: -8% 0;
  background-size: cover;
  background-position: center;
  will-change: transform;
}
.partnership-overlay { position: absolute; inset: 0; background: rgba(15, 17, 16, 0.78); }
.partnership-content { position: relative; z-index: 2; max-width: 760px; }
.partnership-title { margin-bottom: 8px; color: #F3F1EB; }
.partnership-content .body-copy { color: rgba(243, 241, 235, 0.7); }
.partnership-content .btn { margin-top: 40px; }

/* ---------- Insights ---------- */
.insights { background: var(--bg-a); }
.insights-cats { font-size: 13px; color: var(--text-body); letter-spacing: 0.06em; margin-top: 18px; }
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(28px, 4vw, 56px);
}
.insight .img-frame { aspect-ratio: 4 / 3; }
.insight-meta { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--eyebrow-c); font-weight: 700; margin-top: 22px; }
.insight h3 { font-family: var(--serif); font-size: 25px; font-weight: 400; line-height: 1.25; margin-top: 10px; color: var(--heading); }

/* ---------- Contact CTA + Form ---------- */
.contact-cta { text-align: center; }
.contact-inner { max-width: 820px; }
.contact-inner .body-copy { margin-left: auto; margin-right: auto; }

.contact-form {
  margin: 56px auto 0;
  max-width: 640px;
  text-align: left;
  display: grid;
  gap: 26px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.form-field { display: flex; flex-direction: column; gap: 10px; }
.form-field label {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--bronze);
}
.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--sans);
  font-size: 16px;
  color: var(--heading);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-c);
  padding: 12px 2px;
  outline: none;
  border-radius: 0;
  transition: border-color 0.4s var(--ease), color 0.5s var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.form-field select { cursor: pointer; }
.form-field select option { background: var(--bg-em); color: var(--heading); }
.form-field textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-body); opacity: 0.6; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus { border-bottom-color: var(--bronze); }
.form-field.has-error input,
.form-field.has-error textarea { border-bottom-color: #c96a5a; }
.form-error { font-size: 13px; color: #c96a5a; display: none; }
.form-field.has-error .form-error { display: block; }
.form-submit { text-align: center; margin-top: 12px; }
.form-status { font-size: 14px; color: var(--bronze); text-align: center; margin-top: 16px; min-height: 20px; }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-footer);
  color: var(--text-strong);
  padding: clamp(70px, 8vw, 110px) 0 40px;
  transition: background 0.5s var(--ease);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: clamp(48px, 6vw, 100px);
  padding-bottom: 64px;
  border-bottom: 1px solid var(--line-c);
}
.footer-logo { font-size: 22px; font-weight: 700; letter-spacing: 0.18em; color: var(--heading); }
.footer-tagline { font-size: 15px; color: var(--text-body); margin-top: 20px; max-width: 36ch; }
.footer-loc { font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bronze); margin-top: 26px; }
.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 32px;
}
.footer-head {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-body);
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-body);
  padding: 5px 0;
  transition: color 0.3s var(--ease), padding-left 0.3s var(--ease);
}
.footer-col a:hover { color: var(--bronze); padding-left: 5px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 34px;
  font-size: 13px;
  color: var(--text-body);
}
.footer-legal { display: flex; gap: 26px; }
.footer-legal a { transition: color 0.3s var(--ease); }
.footer-legal a:hover { color: var(--bronze); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .main-nav, .header-cta { display: none; }
  .menu-toggle { display: flex; }
  .cap-grid, .intro-grid, .sust-grid, .tech-grid, .leader-grid { grid-template-columns: 1fr; }
  .cap-media { position: static; }
  .cap-images { aspect-ratio: 16 / 10; }
  .project, .project-alt { grid-template-columns: 1fr; }
  .project-alt .project-media { order: 1; }
  .project-alt .project-info { order: 2; text-align: left; }
  .project-alt .project-tags { justify-content: flex-start; }
  .timeline { border-top: none; }
  .stage { border-right: none; border-top: 1px solid var(--line-c); padding-left: 0; }
  .footer-top { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .hero { min-height: 560px; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .hero-scroll-hint { display: none; }
  .sust-list { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .eco-node { white-space: normal; text-align: center; max-width: 110px; padding: 8px 10px 8px 22px; }
  .theme-toggle { right: 14px; bottom: 14px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- Reduced motion ---------- */
@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;
  }
  .reveal { opacity: 1; transform: none; }
  .hero-slide { animation: none; }
}
