/* Merciven — site styles. One stylesheet, no framework. */

:root {
  --ink: #0b0d26;
  --text: #334155;
  --muted: #64748b;
  --brand: #3b2fd6;
  --brand-hover: #2f22b8;
  --brand-soft: #efedff;
  --accent: #6d28d9;
  --bg: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --radius: 10px;
  --max: 1120px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

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

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

a { color: var(--brand); text-underline-offset: 3px; }
a:hover { color: var(--brand-hover); }

h1, h2, h3 { color: var(--ink); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.25rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; margin: 0 0 1em; }
li { margin-bottom: 0.35em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 100;
}
.skip-link:focus { left: 8px; }

:focus-visible { outline: 3px solid #a5b4fc; outline-offset: 2px; border-radius: 4px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.16em; text-transform: uppercase; }
.brand img { width: 32px; height: 32px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--text); text-decoration: none; font-size: 0.95rem; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--brand); }
.nav .btn { color: #fff; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; cursor: pointer; color: var(--ink); font: inherit; font-size: 0.9rem;
}

@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--border); padding: 8px 24px 20px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav .btn { margin-top: 14px; text-align: center; border-bottom: 0; }
}

/* Buttons */
.btn {
  display: inline-block; background: var(--brand); color: #fff; text-decoration: none;
  font-weight: 600; font-size: 0.97rem; padding: 12px 22px; border-radius: 8px;
  border: 1px solid var(--brand); transition: background 0.15s;
}
.btn:hover { background: var(--brand-hover); color: #fff; }
.btn-secondary { background: #fff; color: var(--brand); border-color: var(--border); }
.btn-secondary:hover { background: var(--surface); color: var(--brand); }
.nav .btn { padding: 9px 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* Sections */
section { padding: 80px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.eyebrow { display: block; font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 12px; }
.lead { font-size: 1.2rem; color: var(--text); max-width: 680px; }
.section-head { max-width: 720px; margin-bottom: 44px; }

.hero { padding: 96px 0 72px; }
.hero h1 { max-width: 820px; }
.page-hero { padding: 72px 0 40px; }

/* Grids and cards */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } section { padding: 60px 0; } .hero { padding: 64px 0 48px; } }

.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card h3 { margin-bottom: 0.4em; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--border); }
.stat strong { display: block; font-size: 2rem; color: var(--ink); letter-spacing: -0.02em; line-height: 1.1; }
.stat span { font-size: 0.92rem; color: var(--muted); }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.tags li { margin: 0; font-size: 0.85rem; background: var(--brand-soft); color: var(--brand); padding: 4px 12px; border-radius: 999px; font-weight: 500; }

.check-list { list-style: none; padding: 0; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before {
  content: ""; position: absolute; left: 2px; top: 0.5em; width: 14px; height: 8px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
.steps li { counter-increment: step; margin: 0; }
.steps li::before { content: counter(step, decimal-leading-zero); display: block; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.steps strong { display: block; color: var(--ink); margin-bottom: 4px; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

/* Case studies */
.case { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; padding: 40px 0; border-top: 1px solid var(--border); }
.case:first-of-type { border-top: 0; padding-top: 0; }
.case-meta { font-size: 0.92rem; color: var(--muted); }
.case-meta dt { font-weight: 600; color: var(--ink); margin-top: 12px; }
.case-meta dd { margin: 0; }
.results { display: flex; flex-wrap: wrap; gap: 28px; margin: 20px 0; }
.results div strong { display: block; font-size: 1.6rem; color: var(--brand); line-height: 1.1; }
.results div span { font-size: 0.88rem; color: var(--muted); }
@media (max-width: 760px) { .case { grid-template-columns: 1fr; gap: 16px; } }

.card-link { text-decoration: none; color: inherit; display: block; transition: border-color 0.15s, box-shadow 0.15s; }
.card-link:hover { border-color: #c7c2fb; box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06); color: inherit; }
.card-link .more { color: var(--brand); font-weight: 600; font-size: 0.95rem; }

/* CTA band */
.cta { background: var(--ink); color: #cbd5e1; border-radius: 16px; padding: 56px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta h2 { color: #fff; margin-bottom: 8px; }
.cta p { margin: 0; max-width: 560px; }
.cta .btn { background: #fff; color: var(--ink); border-color: #fff; }
.cta .btn:hover { background: #e2e8f0; }
@media (max-width: 640px) { .cta { padding: 36px 24px; } }

/* FAQ */
details { border-bottom: 1px solid var(--border); padding: 18px 0; }
summary { cursor: pointer; font-weight: 600; color: var(--ink); list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 1.3rem; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { margin: 12px 0 0; }

/* Contact */
.contact-box { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 760px) { .contact-box { grid-template-columns: 1fr; } }
.contact-method { font-size: 1.05rem; }
.contact-method a { font-weight: 600; word-break: break-word; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0 32px; font-size: 0.92rem; color: var(--muted); }
.footer-grid { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-grid nav { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-grid a { color: var(--text); text-decoration: none; }
.footer-grid a:hover { color: var(--brand); }
.footer-bottom { margin-top: 32px; }

/* Illustrations on the Work page */
.shots { display: grid; gap: 40px; }
.shot { margin: 0; }
.shot img { width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); background: #fff; }
.shot figcaption { margin-top: 12px; font-size: 0.95rem; color: var(--muted); }
.shot figcaption strong { color: var(--ink); }