/* ===== Instarank — Design System ===== */
:root {
  --ink: #0a0c0a;
  --ink-2: #141714;
  --paper: #f6f7f4;
  --white: #ffffff;
  --green: #47e38b;
  --green-dim: #2bb365;
  --gray: #8b8f8a;
  --border: rgba(0,0,0,.08);
  --border-light: rgba(255,255,255,.12);
  --font-h: 'Space Grotesk', sans-serif;
  --font-b: 'Inter', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 100px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #187a46; outline-offset: 5px; }

body {
  font-family: var(--font-b);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-h); font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; }

a { color: inherit; text-decoration: none; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-h); font-weight: 600; font-size: 15px;
  padding: 12px 24px; border-radius: 100px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .25s, background .25s, color .25s, border-color .25s;
}
.btn .btn-arrow { transition: transform .25s; }
.btn:hover .btn-arrow { transform: translateX(5px); }
.btn-primary { background: var(--green); color: var(--ink); }
.btn-primary:hover { background: var(--ink); color: var(--green); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-lg { padding: 16px 32px; font-size: 16px; }

/* ===== Header ===== */
.header .logo, .header .nav a { color: #fff; }
.header .nav-toggle span { background: #fff; }
body .header, body .header.scrolled { background: rgba(10,12,10,.96); }
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  padding: 18px 0; transition: background .3s, box-shadow .3s, padding .3s;
}
.header.scrolled {
  background: rgba(246,247,244,.9); backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border); padding: 12px 0;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo {
  font-family: var(--font-h); font-weight: 700; font-size: 20px; letter-spacing: 0.02em;
  display: inline-flex; align-items: center; gap: 8px;
}
.logo span:last-child { color: var(--green-dim); }
.logo-mark {
  width: 22px; height: 22px; background: var(--green);
  clip-path: polygon(0 0, 100% 0, 100% 65%, 35% 100%, 0 100%);
  position: relative;
}
.nav { display: flex; gap: 32px; }
.nav a {
  font-size: 14px; font-weight: 500; color: var(--ink);
  opacity: .75; transition: opacity .2s;
}
.nav a:hover { opacity: 1; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; }

/* ===== Sections ===== */
.section { padding: 110px 0; }
.section-dark { background: var(--ink); color: var(--paper); }
.section-alt { background: var(--white); }
.kicker {
  display: block; font-family: var(--font-h); font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .18em; color: var(--green-dim); margin-bottom: 16px;
}
.kicker-green { color: var(--green); }
.section-head h2 { font-size: clamp(40px, 5.5vw, 64px); margin-bottom: 64px; }

/* ===== Services ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  background: var(--paper); border: 1px solid var(--border); border-radius: 24px;
  padding: 44px 36px; transition: transform .3s, box-shadow .3s;
}
.section-alt .service-card, .service-card { background: var(--white); }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px -20px rgba(0,0,0,.2); }
.service-card--dark { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.service-card--dark ul li { color: #b7bbb6; }
.service-num {
  font-family: var(--font-h); font-size: 14px; font-weight: 700; color: var(--green-dim);
  margin-bottom: 28px; letter-spacing: .1em;
}
.service-card h3 { font-size: 28px; margin-bottom: 14px; }
.service-card p { color: #4a4e49; margin-bottom: 22px; font-size: 15px; }
.service-card--dark p { color: #b7bbb6; }
.service-card ul { list-style: none; margin-bottom: 28px; }
.service-card li { padding: 8px 0 8px 22px; position: relative; font-size: 14px; color: #4a4e49; }
.service-card li::before { content: '✦'; position: absolute; left: 0; color: var(--green-dim); }
.service-card--dark li { color: #b7bbb6; }
.service-link { font-family: var(--font-h); font-weight: 600; font-size: 14px; color: var(--green-dim); }
.service-card--dark .service-link { color: var(--green); }

/* ===== Big statement ===== */
.big-statement { max-width: 860px; margin-bottom: 80px; }
.big-statement h2 { font-size: clamp(36px, 5vw, 60px); margin: 16px 0 24px; }
.green { color: var(--green); }
.big-statement p { font-size: 18px; color: #b7bbb6; max-width: 640px; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.value { border-top: 1px solid var(--border-light); padding-top: 20px; }
.value h4 { font-size: 18px; margin-bottom: 10px; color: var(--paper); }
.value p { font-size: 14px; color: #8b8f8a; }

/* ===== Work ===== */
.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.work-card { border-radius: 24px; overflow: hidden; border: 1px solid var(--border); background: var(--white); transition: transform .3s; }
.work-card:hover { transform: translateY(-6px); }
.work-visual {
  height: 280px; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-h); font-weight: 700; font-size: 15px; letter-spacing: .35em;
  color: rgba(255,255,255,.85); position: relative; overflow: hidden;
}
.work-visual::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 20%, rgba(255,255,255,.25), transparent 55%);
}
.work-visual-1 { background: linear-gradient(135deg, #0a2e1d, #14532d); }
.work-visual-2 { background: linear-gradient(135deg, #111, #3b3b3b); }
.work-visual-3 { background: linear-gradient(135deg, #1a3c2b, #47e38b); }
.work-visual-4 { background: linear-gradient(135deg, #0d1f16, #2bb365); }
.work-meta { padding: 28px; }
.work-meta h3 { font-size: 22px; margin-bottom: 4px; }
.work-meta p { color: var(--gray); font-size: 14px; margin-bottom: 16px; }
.work-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.work-tags span {
  font-family: var(--font-h); font-size: 12px; font-weight: 600;
  border: 1px solid var(--border); border-radius: 100px; padding: 5px 14px; color: #4a4e49;
}

/* ===== Process ===== */
.process-list { display: flex; flex-direction: column; }
.process-step {
  display: grid; grid-template-columns: 120px 1fr; gap: 32px;
  padding: 40px 0; border-bottom: 1px solid var(--border); align-items: start;
}
.process-step:last-child { border-bottom: 0; }
.process-num { font-family: var(--font-h); font-size: 48px; font-weight: 700; color: var(--green-dim); opacity: .9; }
.process-step h3 { font-size: 26px; margin-bottom: 10px; }
.process-step p { color: #4a4e49; max-width: 620px; }

/* ===== Testimonials ===== */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testi {
  border: 1px solid var(--border-light); border-radius: 24px; padding: 36px;
  background: var(--ink-2);
}
.testi p { font-size: 16px; line-height: 1.7; margin-bottom: 20px; color: var(--paper); }
.content-note { margin: -24px 0 32px; font-size: 14px; line-height: 1.6; }
.testi footer { font-size: 13px; color: #8b8f8a; }

/* ===== CTA ===== */
.cta { background: var(--green); color: var(--ink); padding: 120px 0; }
.cta-inner { max-width: 720px; margin: 0 auto; text-align: center; }
.cta h2 { font-size: clamp(44px, 6vw, 76px); margin-bottom: 20px; }
.cta h2 em { font-style: normal; text-decoration: underline; text-decoration-thickness: 6px; text-underline-offset: 10px; }
.cta p { font-size: 18px; margin-bottom: 40px; color: rgba(10,12,10,.75); }
.cta-form { display: flex; flex-direction: column; gap: 12px; max-width: 460px; margin: 0 auto; }
.cta-form .field { display: block; text-align: left; }
.cta-form .field-label {
  display: block; margin: 0 0 6px 8px;
  font-family: var(--font-h); font-size: 11px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: rgba(10,12,10,.7);
}
.cta-form .field-label em { font-style: normal; opacity: .6; text-transform: none; letter-spacing: 0; }
.cta-form input {
  padding: 16px 22px; border-radius: 100px; border: 2px solid var(--ink);
  background: transparent; font-family: var(--font-b); font-size: 15px; color: var(--ink);
  width: 100%;
}
.cta-form input:focus { outline: none; background: var(--paper); }
.cta-form .btn { justify-content: center; margin-top: 8px; border: 2px solid var(--ink); background: var(--ink); color: var(--green); }
.cta-form .btn:hover { background: transparent; color: var(--ink); }
.cta-note { margin-top: 20px; font-size: 13px; color: rgba(10,12,10,.6); }

/* ===== Footer ===== */
.footer { background: var(--ink); color: var(--paper); padding: 80px 0 32px; }
.footer .logo { color: var(--paper); }
.footer .logo span:last-child { color: var(--green); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 64px; }
.footer-brand p { color: #8b8f8a; font-size: 14px; margin-top: 16px; max-width: 300px; }
.footer-col h5 { font-family: var(--font-h); font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: #8b8f8a; margin-bottom: 18px; }
.footer-col a { display: block; font-size: 14px; color: var(--paper); opacity: .75; padding: 5px 0; }
.footer-col a:hover { opacity: 1; color: var(--green); }
.footer-bottom {
  display: flex; justify-content: space-between; padding-top: 28px;
  border-top: 1px solid var(--border-light); font-size: 13px; color: #8b8f8a;
}

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .services-grid, .values-grid, .testi-grid { grid-template-columns: 1fr 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .js .nav, .header-cta { display: none; }
  html:not(.js) .header-inner { flex-wrap: wrap; gap: 12px; }
  html:not(.js) .nav { display: flex; flex-wrap: wrap; gap: 16px; }
  .header .nav.open a { color: var(--ink); }
  .nav-toggle { display: none; min-width: 44px; min-height: 44px; }
  .js .nav-toggle { display: block; }
  .nav.open {
    display: flex; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; background: var(--paper); padding: 24px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .services-grid, .values-grid, .testi-grid { grid-template-columns: 1fr; }
  .process-step { grid-template-columns: 1fr; gap: 8px; }
  .footer-inner { grid-template-columns: 1fr; }
  .work-visual { font-size: 12px; letter-spacing: .2em; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}