/* ════════════════════════════════════════════════════════════════
   main.css — sharlena.me AI consulting landing page
════════════════════════════════════════════════════════════════ */

:root {
  --bg:       #07070f;
  --surface:  #0e0e1e;
  --surface2: #16162a;
  --peri:     #7c82e8;
  --peri-l:   #abb0f5;
  --peri-d:   #5056c0;
  --cream:    #eceaf8;
  --dim:      rgba(236,234,248,0.62);
  --dim2:     rgba(236,234,248,0.38);
  --line:     #23233f;
  --f-sans:   'DM Sans', sans-serif;
  --f-mono:   'DM Mono', monospace;
  --f-serif:  'Cormorant Garamond', serif;
  --maxw:     1140px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
img { max-width: 100%; display: block; }

body {
  background: var(--bg);
  color: var(--cream);
  font-family: var(--f-sans);
  font-weight: 300;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
em { font-family: var(--f-serif); font-style: italic; font-weight: 500; color: var(--peri-l); }

.eyebrow {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--peri-l); margin-bottom: 14px; display: block;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px; border-radius: 8px; font-family: var(--f-sans);
  font-size: 15px; font-weight: 500; letter-spacing: 0.01em;
  border: 1px solid transparent; transition: transform 0.15s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-p { background: var(--peri); color: #07070f; }
.btn-p:hover { background: var(--peri-l); }
.btn-g { background: transparent; border-color: var(--line); color: var(--cream); }
.btn-g:hover { border-color: var(--peri); }
.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-block { width: 100%; }

/* ── Header ─────────────────────────────────────────────────── */
#site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 500;
  background: rgba(7,7,15,0.7); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
#site-header.scrolled { border-color: var(--line); background: rgba(7,7,15,0.92); }
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 18px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { font-family: var(--f-mono); font-size: 15px; letter-spacing: 0.04em; color: var(--cream); white-space: nowrap; }
.brand span { color: var(--peri-l); }
#nav-links { display: flex; align-items: center; gap: 30px; }
#nav-links a:not(.btn) {
  font-size: 14px; color: var(--dim); transition: color 0.2s;
}
#nav-links a:not(.btn):hover { color: var(--cream); }
#nav-toggle {
  display: none; background: none; border: none; padding: 4px;
  width: 28px; height: 28px; flex-direction: column; justify-content: space-between;
}
#nav-toggle span {
  display: block; height: 2px; width: 100%;
  background: var(--cream); border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ── Hero ───────────────────────────────────────────────────── */
#hero {
  padding: 180px 0 100px; position: relative; overflow: hidden;
}
#hero::before {
  content: ''; position: absolute; top: -200px; right: -200px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,130,232,0.18), transparent 70%);
  pointer-events: none;
}
.hero-inner { max-width: 760px; }
.hero-h {
  font-size: clamp(36px, 5.4vw, 60px); font-weight: 400; line-height: 1.12;
  letter-spacing: -0.01em; margin-bottom: 22px;
}
.hero-sub {
  font-size: 18px; color: var(--dim); max-width: 600px; margin-bottom: 36px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-cred {
  font-family: var(--f-mono); font-size: 12.5px; color: var(--dim2);
  letter-spacing: 0.02em; border-top: 1px solid var(--line); padding-top: 20px; max-width: 600px;
}

/* ── Section scaffolding ────────────────────────────────────── */
section { padding: 100px 0; border-top: 1px solid var(--line); }
#hero { border-top: none; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-h { font-size: clamp(28px, 3.6vw, 38px); font-weight: 400; line-height: 1.2; margin-bottom: 16px; }
.section-sub { color: var(--dim); font-size: 16px; }
.note {
  font-family: var(--f-mono); font-size: 12.5px; color: var(--dim2);
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 16px; max-width: 640px; margin-top: 18px; line-height: 1.6;
}

/* ── Grids / cards ──────────────────────────────────────────── */
.grid { display: grid; gap: 22px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 28px 26px; transition: border-color 0.25s, transform 0.25s;
}
.card:hover { border-color: var(--peri-d); transform: translateY(-3px); }
.card-icon { font-size: 22px; margin-bottom: 16px; }
.card-title { font-size: 18px; font-weight: 500; margin-bottom: 10px; }
.card-body { font-size: 14.5px; color: var(--dim); line-height: 1.6; }

/* ── Case studies ───────────────────────────────────────────── */
.case-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 30px 28px; }
.case-tag {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--peri-l); margin-bottom: 12px; display: block;
}
.case-title { font-size: 19px; font-weight: 500; margin-bottom: 16px; }
.case-row { margin-bottom: 12px; }
.case-row .lbl { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--dim2); display: block; margin-bottom: 4px; }
.case-row p { font-size: 14px; color: var(--dim); line-height: 1.55; }

/* ── Pricing ────────────────────────────────────────────────── */
.price-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 32px 26px; display: flex; flex-direction: column;
}
.price-card.featured { border-color: var(--peri); background: var(--surface2); }
.price-name { font-size: 16px; font-weight: 500; margin-bottom: 6px; }
.price-amt { font-family: var(--f-mono); font-size: 30px; color: var(--peri-l); margin-bottom: 4px; }
.price-period { font-size: 12.5px; color: var(--dim2); margin-bottom: 20px; }
.price-list { list-style: none; font-size: 14px; color: var(--dim); margin-bottom: 26px; flex-grow: 1; }
.price-list li { padding: 7px 0; border-top: 1px solid var(--line); }
.price-list li:first-child { border-top: none; }

/* ── Final CTA ──────────────────────────────────────────────── */
#final-cta { text-align: center; }
#final-cta .section-head { margin: 0 auto 32px; }
#final-cta .section-sub { margin: 0 auto; }
.final-cta-btns { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ── Footer ─────────────────────────────────────────────────── */
#site-footer { border-top: 1px solid var(--line); padding: 56px 0 40px; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; margin-bottom: 36px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; color: var(--dim); }
.footer-links a:hover { color: var(--cream); }
.footer-bottom {
  font-family: var(--f-mono); font-size: 12px; color: var(--dim2);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  border-top: 1px solid var(--line); padding-top: 24px;
}

/* ── Reveal-on-scroll ───────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 880px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  #nav-links { position: fixed; top: 60px; left: 0; right: 0; background: rgba(7,7,15,0.97);
    flex-direction: column; align-items: flex-start; padding: 20px 28px 26px; gap: 18px;
    border-bottom: 1px solid var(--line); transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity 0.2s, transform 0.2s; }
  #nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  #nav-toggle { display: flex; flex-shrink: 0; }
  .brand span { display: none; }
  .grid-4 { grid-template-columns: 1fr; }
  #hero { padding: 140px 0 70px; }
  .footer-top { flex-direction: column; }
}
@media (max-width: 420px) {
  .brand { font-size: 12px; }
}