/* ============================================================
   Nirvana Carbon Solutions — site styles
   Palette derived from the brand mark (teal / leaf-green / sky-blue)
   ============================================================ */

:root {
  /* Brand */
  --ink:        #10353d;   /* deep teal — text, dark sections */
  --ink-2:      #0b262c;
  --green:      #57b23a;   /* leaf green */
  --green-deep: #3f8f2c;
  --sky:        #3a9bb5;   /* sky / water blue */
  --sky-deep:   #2b7f97;

  /* Neutrals */
  --paper:      #faf8f3;   /* warm off-white page bg */
  --paper-2:    #f2eee5;
  --card:       #ffffff;
  --line:       #e6e0d4;
  --muted:      #5c6b6b;
  --white:      #ffffff;

  --grad: linear-gradient(120deg, var(--green) 0%, var(--sky) 100%);
  --grad-ink: linear-gradient(160deg, #16414a 0%, #0b262c 100%);

  --maxw: 1120px;
  --radius: 18px;
  --shadow: 0 18px 50px -24px rgba(16, 53, 61, .35);
  --shadow-sm: 0 8px 24px -14px rgba(16, 53, 61, .35);

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.1; color: var(--ink); letter-spacing: -.01em; }
h1 { font-size: clamp(2.4rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); margin: 0 0 .4em; }
h3 { font-size: 1.28rem; margin: 0 0 .35em; }
p { margin: 0 0 1.1em; }

a { color: var(--sky-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

.eyebrow {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .76rem;
  font-weight: 600;
  color: var(--green-deep);
  margin: 0 0 1rem;
}
.eyebrow.on-dark { color: #9fe0c9; }

.lead { font-size: 1.18rem; color: #35484a; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  font-family: var(--sans); font-weight: 600; font-size: .98rem;
  padding: .85em 1.5em; border-radius: 999px;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { box-shadow: 0 14px 30px -12px rgba(58,155,181,.6); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost.on-dark { color: #fff; border-color: rgba(255,255,255,.35); }
.btn-ghost:hover { border-color: var(--green); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 243, .82);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
.brand img { width: 38px; height: 38px; }
.brand b { font-family: var(--serif); font-size: 1.12rem; color: var(--ink); font-weight: 600; letter-spacing: -.01em; }
.brand b span { display:block; font-family: var(--sans); font-size: .58rem; letter-spacing: .22em; font-weight: 600; color: var(--green-deep); text-transform: uppercase; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { color: var(--ink); font-weight: 500; font-size: .96rem; }
.nav-links a:hover { color: var(--green-deep); text-decoration: none; }
.nav-links .btn { padding: .6em 1.2em; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display:block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .2s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--grad-ink); color: #eaf3f1;
}
.hero .wrap { position: relative; z-index: 2; padding-top: 92px; padding-bottom: 120px; }
.hero h1 { color: #fff; max-width: 15ch; }
.hero p { color: #bcd6d3; font-size: 1.22rem; max-width: 52ch; }
.hero .cta-row { display: flex; gap: .9rem; flex-wrap: wrap; margin-top: 2rem; }
.hero-waves { position: absolute; left: 0; right: 0; bottom: -1px; z-index: 1; width: 100%; }
.hero-stars { position: absolute; inset: 0; z-index: 0; opacity: .5; }

/* ---------- Sections ---------- */
section { padding: 84px 0; }
.section-head { max-width: 640px; margin-bottom: 3rem; }
.bg-paper2 { background: var(--paper-2); }
.bg-ink { background: var(--grad-ink); color: #dcebe8; }
.bg-ink h2, .bg-ink h3 { color: #fff; }
.bg-ink .lead { color: #b7d2ce; }

/* ---------- Grid / cards ---------- */
.grid { display: grid; gap: 26px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px;
  box-shadow: var(--shadow-sm);
}
.card .ic {
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 16px;
  display: grid; place-items: center; background: var(--grad); color: #fff;
}
.card h3 { margin-bottom: .25em; }
.card p { color: var(--muted); margin: 0; font-size: .98rem; }

/* Stat band */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; }
.stat b { display: block; font-family: var(--serif); font-size: 2.6rem; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { font-size: .92rem; color: var(--muted); }
.bg-ink .stat span { color: #a7c4c0; }

/* Split feature */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.split .media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--grad-ink); aspect-ratio: 4/3; display:grid; place-items:center; }
.split .media img { width: 58%; opacity: .96; }

/* Callout / CTA band */
.cta-band { background: var(--grad-ink); color: #fff; border-radius: 26px; padding: 60px; text-align: center; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #c5ddd9; max-width: 46ch; margin-left:auto; margin-right:auto; }

/* People (team) */
.people { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.person { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); }
.person .avatar { width: 60px; height: 60px; border-radius: 50%; background: var(--grad); color:#fff; display:grid; place-items:center; font-family: var(--serif); font-size: 1.4rem; margin-bottom: 16px; }
.person h3 { margin-bottom: .1em; }
.person .role { font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; color: var(--green-deep); font-weight: 600; margin-bottom: .8em; }
.person p { color: var(--muted); font-size: .96rem; }
.advisors { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.advisor { padding: 24px; border-left: 3px solid var(--green); background: var(--card); border-radius: 0 12px 12px 0; box-shadow: var(--shadow-sm); }
.advisor h3 { font-size: 1.08rem; }
.advisor p { color: var(--muted); font-size: .9rem; margin: 0; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery .tile { aspect-ratio: 1/1; border-radius: 14px; background: var(--grad-ink); position: relative; overflow: hidden; box-shadow: var(--shadow-sm); display:grid; place-items:center; color: #6f9c98; }
.gallery .tile.wide { grid-column: span 2; aspect-ratio: 2/1; }
.gallery .tile span { font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
form label { display:block; font-weight: 600; font-size: .9rem; margin: 0 0 .4em; }
form input, form textarea {
  width: 100%; padding: .8em 1em; border: 1.5px solid var(--line); border-radius: 12px;
  font: inherit; margin-bottom: 1.1em; background: #fff; color: var(--ink);
}
form input:focus, form textarea:focus { outline: none; border-color: var(--sky); box-shadow: 0 0 0 4px rgba(58,155,181,.12); }
.field-list { list-style: none; padding: 0; margin: 0; }
.field-list li { display:flex; gap: 14px; align-items:flex-start; margin-bottom: 22px; }
.field-list .ic { flex: none; width: 42px; height: 42px; border-radius: 12px; background: var(--grad); color:#fff; display:grid; place-items:center; }
.field-list b { display:block; }
.field-list a { color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink-2); color: #b7cdc9; padding: 64px 0 34px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.site-footer img.lock { width: 190px; margin-bottom: 18px; }
.site-footer h4 { color: #fff; font-family: var(--sans); font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #b7cdc9; font-size: .96rem; }
.site-footer a:hover { color: var(--green); text-decoration: none; }
.footer-bottom { display:flex; justify-content: space-between; align-items:center; padding-top: 26px; font-size: .84rem; color: #7f9c98; flex-wrap: wrap; gap: 10px; }
.footer-locations { font-size: .95rem; color: #9db8b4; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .g-3, .advisors, .gallery { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats { grid-template-columns: repeat(2,1fr); gap: 30px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .people { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  section { padding: 60px 0; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: flex-start; gap: 1rem;
    position: absolute; top: 72px; left: 0; right: 0; background: var(--paper);
    padding: 22px 24px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-sm);
  }
  .nav-toggle { display: block; }
  .g-2, .g-3, .advisors, .gallery, .stats { grid-template-columns: 1fr; }
  .gallery .tile.wide { grid-column: span 1; aspect-ratio: 1/1; }
  .cta-band { padding: 40px 26px; }
  .hero .wrap { padding-top: 64px; padding-bottom: 90px; }
}