/* ════════════════════════════════
   INSTITUTO SOMOS ÁGUA — style.css
   Clean, minimal, photo-forward
════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink:       #111111;
  --ink-soft:  #555555;
  --ink-muted: #999999;
  --water:     #2E8B9A;
  --water-lt:  #E6F4F7;
  --sand:      #F5EFE6;
  --white:     #FFFFFF;
  --off-white: #FAFAF8;
  --border:    #E5E5E5;
  --nav-h:     64px;
  --max-w:     1060px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.72;
  padding-top: var(--nav-h);
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 300;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2.5rem;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: .01em;
}
.nav-logo span { color: var(--water); }
.nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .83rem;
  font-weight: 500;
  letter-spacing: .02em;
  transition: color .18s;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-cta {
  color: var(--water) !important;
  border-bottom: 1px solid var(--water);
  padding-bottom: 1px;
}
.hamburger {
  display: none; background: none; border: none;
  cursor: pointer; padding: .4rem; gap: 4px;
  flex-direction: column; align-items: flex-end;
}
.hamburger span {
  display: block; height: 1.5px; background: var(--ink);
  transition: all .25s;
}
.hamburger span:nth-child(1) { width: 22px; }
.hamburger span:nth-child(2) { width: 16px; }
.hamburger span:nth-child(3) { width: 22px; }

/* ── LAYOUT ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
section { padding: 5.5rem 0; }
section.tight { padding: 3.5rem 0; }

/* ── TYPOGRAPHY ── */
.eyebrow {
  display: inline-block;
  font-size: .7rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--water);
  margin-bottom: .75rem;
}
h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  line-height: 1.1; font-weight: 700;
  letter-spacing: -.01em;
}
h2 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.2; font-weight: 700;
  color: var(--ink);
  margin-bottom: 1rem;
}
h3 {
  font-size: 1rem; font-weight: 600;
  color: var(--ink);
  margin-bottom: .5rem;
}
p { color: var(--ink-soft); margin-bottom: .9rem; font-size: .97rem; }
p:last-child { margin-bottom: 0; }
strong { color: var(--ink); font-weight: 600; }

/* ── BUTTONS ── */
.btn {
  display: inline-block;
  padding: .75rem 1.75rem;
  font-size: .85rem; font-weight: 600; letter-spacing: .04em;
  text-decoration: none; border-radius: 2px;
  transition: all .18s;
}
.btn-dark {
  background: var(--ink); color: var(--white);
}
.btn-dark:hover { background: #333; }
.btn-outline {
  border: 1px solid rgba(255,255,255,.5);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,.1); border-color: white; }
.btn-water { background: var(--water); color: white; }
.btn-water:hover { background: #266f7d; }

/* ── DIVIDER ── */
.divider { height: 1px; background: var(--border); margin: 0; }

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  padding: 5rem 0 4.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--off-white);
}
.page-hero .eyebrow { }
.page-hero h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); margin-bottom: .75rem; }
.page-hero p { max-width: 520px; font-size: 1.05rem; }

/* ── FULL-BLEED PHOTO ── */
.photo-full {
  width: 100%;
  aspect-ratio: 16/7;
  object-fit: cover;
  display: block;
}
.photo-full.tall { aspect-ratio: 16/9; }

.photo-caption {
  font-size: .75rem; color: var(--ink-muted);
  letter-spacing: .04em; text-align: right;
  padding: .5rem 2rem 0;
}

/* ── 2-COL GRID ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.grid-2.center { align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }

/* ── STAT ── */
.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 3.5rem; font-weight: 700; line-height: 1;
  color: var(--ink); margin-bottom: .25rem;
}
.stat-num sup { font-size: 1.5rem; vertical-align: super; }
.stat-label { font-size: .8rem; color: var(--ink-muted); letter-spacing: .06em; text-transform: uppercase; }

/* ── CARD ── */
.card {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}
.card h3 { margin-bottom: .4rem; }

.card-box {
  padding: 2rem;
  border: 1px solid var(--border);
  background: var(--white);
}

/* ── QUOTE ── */
.pull-quote {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-style: italic; line-height: 1.45;
  color: var(--ink);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}
.pull-cite {
  display: block; margin-top: 1.25rem;
  font-family: 'Inter', sans-serif;
  font-size: .78rem; font-style: normal;
  color: var(--ink-muted); letter-spacing: .08em; text-transform: uppercase;
}

/* ── INLINE QUOTE ── */
.inline-quote {
  border-left: 2px solid var(--water);
  padding: .75rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic; color: var(--ink-soft);
}

/* ── PROGRESS ── */
.prog-row { margin-bottom: 1rem; }
.prog-meta { display: flex; justify-content: space-between; font-size: .8rem; color: var(--ink-muted); margin-bottom: .35rem; }
.prog-track { height: 3px; background: var(--border); }
.prog-fill { height: 100%; background: var(--water); transition: width 1s ease; }
.prog-fill.good { background: #2D8A5A; }

/* ── STEP ── */
.step {
  display: flex; gap: 1.5rem; align-items: flex-start;
  padding: 1.5rem 0; border-top: 1px solid var(--border);
}
.step:last-child { border-bottom: 1px solid var(--border); }
.step-n {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem; color: var(--water);
  font-weight: 700; flex-shrink: 0; line-height: 1; padding-top: .1rem;
  min-width: 2rem;
}
.step-body h3 { font-size: .97rem; margin-bottom: .3rem; }

/* ── CHECKLIST ── */
.check-list { list-style: none; }
.check-list li {
  display: flex; gap: .75rem; padding: .65rem 0;
  border-top: 1px solid var(--border);
  font-size: .9rem; color: var(--ink-soft);
}
.check-list li:last-child { border-bottom: 1px solid var(--border); }
.check-list li::before { content: '—'; color: var(--water); flex-shrink: 0; }

/* ── PARTNER ── */
.partner {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
}
.partner:last-child { border-bottom: 1px solid var(--border); }
.partner h3 { font-size: .97rem; color: var(--water); margin-bottom: .3rem; }

/* ── PHOTO+TEXT SPLIT ── */
.split { display: grid; grid-template-columns: 1fr 1fr; }
.split-img { overflow: hidden; }
.split-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.split-text { padding: 4rem 3rem; display: flex; flex-direction: column; justify-content: center; }

/* ── FOOTER ── */
footer {
  background: var(--ink); color: rgba(255,255,255,.45);
  padding: 3.5rem 0 2.5rem;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.footer-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem; color: white;
  margin-bottom: .4rem;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem; padding: 2.5rem 0;
  border-top: 1px solid rgba(255,255,255,.1);
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin: 2rem 0 1.5rem;
}
.footer-col h4 { color: rgba(255,255,255,.7); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 1rem; }
.footer-col p { font-size: .83rem; color: rgba(255,255,255,.4); margin-bottom: .3rem; }
.footer-col a { display: block; color: rgba(255,255,255,.45); text-decoration: none; font-size: .83rem; margin-bottom: .4rem; transition: color .15s; }
.footer-col a:hover { color: white; }
.footer-bottom { font-size: .75rem; color: rgba(255,255,255,.25); }

/* ── RESPONSIVE ── */
@media (max-width: 860px) {
  nav { padding: 0 1.25rem; }
  .nav-links { display: none; flex-direction: column; align-items: flex-start; position: absolute; top: var(--nav-h); left: 0; right: 0; background: white; padding: 1.5rem 2rem; gap: 1.2rem; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,.08); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split-img { height: 260px; }
  .split-text { padding: 2.5rem 1.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  section { padding: 3.5rem 0; }
}
@media (max-width: 500px) {
  section { padding: 2.75rem 0; }
  .photo-full { aspect-ratio: 4/3; }
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding: 0 1.25rem; }
}