/* IM Nirmaan Foundation — design system
   Locked per Creative Direction Document v2.
   Palette: white / warm off-white / ink / warm grey / orange #ED4804 (accent only). */

:root {
  --ink: #1A1A1A;
  --grey: #6B655E;
  --grey-soft: #A39C92;
  --hairline: #E8E3DC;
  --cream: #FAF8F4;
  --shell: #F5F2ED;
  --orange: #ED4804;
  --orange-deep: #D13F02;
  --warm-white: #FFF8F3;
  --hero-ink: #2A2622;
  --max: 1240px;
  --pad: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  background: #FFFFFF;
  color: var(--ink);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--orange); }

.wrap { max-width: var(--max); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

h1, h2, h3, .serif { font-family: 'Newsreader', Georgia, serif; font-weight: 500; margin: 0; }
p { margin: 0; max-width: 65ch; }

.eyebrow {
  font-size: 12.5px; font-weight: 500; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--grey); margin: 0 0 clamp(40px, 6vw, 64px);
}

/* ---------- header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: #FFFFFF; border-bottom: 1px solid transparent;
  transition: border-color 240ms ease;
}
.site-header.scrolled { border-bottom-color: var(--hairline); }
.site-header .bar {
  height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand img { height: 34px; width: auto; }
.brand span {
  font-size: 10px; font-weight: 500; letter-spacing: 0.22em;
  color: var(--grey); text-transform: uppercase; padding-top: 12px;
}
nav.primary { display: flex; align-items: center; gap: clamp(20px, 3vw, 36px); }
nav.primary a {
  font-size: 14.5px; padding: 4px 0; border-bottom: 2px solid transparent; white-space: nowrap;
}
nav.primary a[aria-current="page"] {
  color: var(--orange); font-weight: 500; border-bottom-color: var(--orange);
}
.btn {
  display: inline-block; font-family: 'Inter', sans-serif; font-size: 16px; font-weight: 500;
  padding: 15px 32px; border-radius: 4px; white-space: nowrap; cursor: pointer; border: none;
}
.btn-primary { background: var(--orange); color: var(--warm-white); }
.btn-primary:hover { background: var(--orange-deep); color: var(--warm-white); }
.btn-ghost { border: 1px solid var(--ink); color: var(--ink); padding: 14px 32px; }
.btn-ghost:hover { background: rgba(26,26,26,0.05); color: var(--ink); }
.btn-ghost-light { border: 1px solid rgba(255,248,243,0.75); color: var(--warm-white); padding: 14px 32px; }
.btn-ghost-light:hover { background: rgba(255,248,243,0.12); color: var(--warm-white); }
nav.primary .btn { font-size: 14.5px; padding: 10px 22px; margin-left: 8px; }

.menu-toggle {
  display: none; background: none; border: none; padding: 12px; margin: -12px; cursor: pointer;
  flex-direction: column; gap: 5px; align-items: flex-end;
}
.menu-toggle span { display: block; width: 22px; height: 1.5px; background: var(--ink); }

.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 1000; background: #FFFFFF;
  flex-direction: column; padding: 0 var(--pad);
}
.mobile-menu.open { display: flex; }
.mobile-menu .bar { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.mobile-menu .close {
  background: none; border: none; padding: 12px; margin: -12px; cursor: pointer;
  font-size: 14px; font-weight: 500; letter-spacing: 0.08em; color: var(--ink);
}
.mobile-menu nav { display: flex; flex-direction: column; gap: 4px; margin-top: 48px; }
.mobile-menu nav a {
  font-family: 'Newsreader', Georgia, serif; font-size: 34px; font-weight: 400;
  padding: 14px 0; border-bottom: 1px solid #EDE8E1;
}
.mobile-menu nav a[aria-current="page"] { color: var(--orange); }
.mobile-menu .btn { margin-top: 40px; text-align: center; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: clamp(520px, 78vh, 820px);
  background: var(--hero-ink); display: flex; align-items: flex-end; overflow: hidden;
}
.hero .photo-slot { position: absolute; inset: 0; }
.hero .scrim {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(100deg, rgba(20,15,10,0.72) 0%, rgba(20,15,10,0.38) 42%, rgba(20,15,10,0.05) 68%),
              linear-gradient(to top, rgba(20,15,10,0.45) 0%, rgba(20,15,10,0) 32%);
}
.hero .content { position: relative; width: 100%; padding-top: clamp(120px, 16vw, 180px); padding-bottom: clamp(56px, 8vw, 104px); }
.hero .kicker {
  font-size: 12px; font-weight: 500; letter-spacing: 0.22em; text-transform: uppercase;
  color: rgba(255,248,243,0.72); margin: 0 0 24px;
}
.hero h1 {
  font-size: clamp(38px, 5vw, 66px); line-height: 1.08; color: var(--warm-white);
  max-width: 14ch; letter-spacing: -0.005em;
}
.hero h1 em { font-style: normal; color: #FF6A2B; }
.hero .sub { font-size: 18px; color: rgba(255,248,243,0.92); margin-top: 28px; max-width: 48ch; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

/* interior page hero (short, light) */
.page-head { background: var(--cream); padding: calc(64px + clamp(56px, 9vw, 112px)) 0 clamp(56px, 9vw, 112px); }
.page-head h1 { font-size: clamp(36px, 4.6vw, 58px); line-height: 1.1; max-width: 16ch; }
.page-head .lede { font-size: 19px; color: var(--grey); margin-top: 24px; max-width: 56ch; }

/* ---------- photo placeholders (until real documentary photography) ---------- */
.photo-slot {
  background: var(--shell); display: flex; align-items: center; justify-content: center;
  color: var(--grey-soft); font-size: 13.5px; letter-spacing: 0.04em; text-align: center; padding: 24px;
  border: 1px dashed #D8D2C9;
}
.photo-slot.dark { background: #363029; border-color: #4A443C; color: #8A847C; }

/* real photograph filling a slot — same box, same aspect ratio, no chrome */
.photo-slot.has-image { padding: 0; border: none; background: none; overflow: hidden; }
.photo-slot.has-image img { width: 100%; height: 100%; object-fit: cover; }
/* hero photograph, when set — fills the hero beneath the scrim */
.hero .hero-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* ---------- photo strip (auto-fed from assets/strip/, homepage) ---------- */
.strip { overflow: hidden; }
.strip-track {
  display: flex; width: max-content;
  animation: strip-scroll 36s linear infinite;
}
.strip:hover .strip-track { animation-play-state: paused; }
.strip-seq { display: flex; gap: 16px; padding-left: 16px; }
.strip-seq img { height: 300px; width: auto; object-fit: cover; flex: none; }
@keyframes strip-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .strip { overflow-x: auto; }
  .strip-track { animation: none; }
  .strip-track .strip-seq[aria-hidden="true"] { display: none; }
}

/* ---------- sections ---------- */
section.band { padding: clamp(72px, 10vw, 136px) 0; }
section.band.cream { background: var(--cream); }

/* evidence */
.evidence { display: flex; flex-wrap: wrap; gap: clamp(40px, 5vw, 72px) clamp(48px, 6vw, 96px); }
.evidence .stat { display: flex; flex-direction: column; gap: 10px; min-width: 150px; }
.evidence .stat .rule { width: 28px; height: 2px; background: var(--orange); }
.evidence .num { font-family: 'Newsreader', Georgia, serif; font-weight: 500; font-size: clamp(40px, 4vw, 56px); line-height: 1; }
.evidence .label { font-size: 14.5px; color: var(--grey); }
.evidence .note { font-size: 12.5px; color: var(--grey-soft); }
.fineprint { font-size: 12.5px; color: var(--grey-soft); margin-top: 28px; }

/* initiative / cards */
.cards { display: flex; flex-wrap: wrap; gap: clamp(24px, 3vw, 40px); align-items: stretch; }
.card {
  flex: 1 1 420px; min-width: 300px; background: #FFFFFF; display: flex; flex-direction: column;
  border: 1px solid var(--hairline); transition: transform 200ms ease;
}
.card:hover { transform: translateY(-2px); }
.card .photo-slot { aspect-ratio: 3 / 2; width: 100%; }
.card .body { padding: clamp(28px, 3vw, 40px); display: flex; flex-direction: column; gap: 16px; flex: 1; }
.card h3 { font-size: clamp(26px, 2.4vw, 32px); line-height: 1.2; }
.card p { font-size: 17px; }
.card .go {
  align-self: flex-start; font-size: 15px; font-weight: 500; margin-top: auto;
  border-bottom: 1px solid var(--ink); padding-bottom: 3px;
}
.card .go:hover { color: var(--orange); border-bottom-color: var(--orange); }

/* logo row */
.logo-row { display: flex; flex-wrap: wrap; align-items: center; gap: clamp(32px, 5vw, 64px) clamp(40px, 6vw, 88px); }
.logo-row .name { font-size: 19px; font-weight: 500; color: #8A847C; letter-spacing: 0.01em; }
.logo-row .slot { font-size: 15px; color: #B5AFA6; border: 1px dashed #D8D2C9; padding: 10px 20px; border-radius: 4px; }
.logo-row .partner-logo {
  height: 36px; width: auto;
  filter: grayscale(1); opacity: 0.65;
  transition: filter 200ms ease, opacity 200ms ease;
}
.logo-row .partner-logo:hover { filter: grayscale(0); opacity: 1; }

/* invite */
.invite { text-align: center; }
.invite h2 { font-size: clamp(30px, 3.6vw, 48px); line-height: 1.15; max-width: 20ch; margin: 0 auto; }
.invite p { font-size: 17px; color: var(--grey); margin: 24px auto 0; max-width: 56ch; }
.invite .actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-top: 40px; }

/* prose blocks on interior pages */
.split { display: flex; flex-wrap: wrap; gap: clamp(32px, 5vw, 72px); align-items: flex-start; }
.split > .text { flex: 1 1 460px; min-width: 300px; }
.split > .media { flex: 1 1 380px; min-width: 280px; }
.split .photo-slot { aspect-ratio: 4 / 3; }
h2.title { font-size: clamp(28px, 3.2vw, 42px); line-height: 1.15; margin-bottom: 24px; }
.text p + p { margin-top: 18px; }
.text .sub { color: var(--grey); }

.facts { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--hairline); margin-top: 32px; }
.facts .row { display: flex; gap: 24px; padding: 14px 0; border-bottom: 1px solid var(--hairline); font-size: 15.5px; }
.facts .k { flex: 0 0 190px; color: var(--grey); }
.facts .v { color: var(--ink); }

/* forms */
form.enquiry { display: flex; flex-direction: column; gap: 20px; max-width: 560px; }
form.enquiry label { font-size: 14px; font-weight: 500; display: block; margin-bottom: 8px; }
form.enquiry input, form.enquiry textarea {
  width: 100%; font-family: 'Inter', sans-serif; font-size: 16px; color: var(--ink);
  background: #FFFFFF; border: 1px solid #D8D2C9; border-radius: 4px; padding: 13px 14px;
}
form.enquiry input:focus, form.enquiry textarea:focus { outline: 2px solid var(--orange); outline-offset: 1px; border-color: var(--orange); }
form.enquiry .hint { font-size: 13px; color: var(--grey-soft); margin-top: 6px; }

/* ---------- footer ---------- */
footer.site-footer { background: var(--hero-ink); color: #CFC8BF; padding: clamp(64px, 9vw, 104px) 0 40px; }
footer .cols { display: flex; flex-wrap: wrap; gap: clamp(40px, 6vw, 88px); }
footer .col { min-width: 180px; }
footer .col h4 {
  font-family: 'Inter', sans-serif; font-size: 12px; font-weight: 500; letter-spacing: 0.18em;
  text-transform: uppercase; color: #8A847C; margin: 0 0 18px;
}
footer .col a, footer .col p { display: block; font-size: 15px; color: #CFC8BF; margin: 0 0 10px; max-width: 38ch; }
footer .col a:hover { color: var(--warm-white); }
footer .legal {
  margin-top: clamp(48px, 6vw, 72px); padding-top: 28px; border-top: 1px solid #3E3830;
  font-size: 13px; color: #8A847C; display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between;
}
footer .legal p { max-width: none; }

/* reveal animation (JS adds .reveal; removed if reduced motion) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 380ms ease-out, transform 380ms ease-out; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* focus visibility */
a:focus-visible, button:focus-visible { outline: 2px solid var(--orange); outline-offset: 3px; }
.btn-primary:focus-visible { outline-color: var(--ink); }

/* ---------- responsive ---------- */
@media (max-width: 780px) {
  nav.primary { display: none; }
  .menu-toggle { display: flex; }
  .facts .k { flex-basis: 140px; }
}