/* ============================================================
   base.css — Shared design tokens, reset, utilities, nav
   Barbara Virsik Portfolio · barbaravirsik.com
   ============================================================ */

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

/* ── Design Tokens ── */
:root {
  --bg:           #F5F2ED;
  --surface:      #FFFFFF;
  --accent:       #0F6674;
  --accent-light: #E5F3F5;
  --accent-mid:   #0D5563;
  --ink:          #1C1C1A;
  --ink-mid:      #444440;
  --ink-muted:    #777770;
  --ink-faint:    #AAAAAA;
  --border:       #E2DED8;
  --dark-bg:      #111F22;
  --dark-surface: #1E3238;
  --serif: 'Playfair Display', Georgia, serif;
  --sans:  'Inter', system-ui, sans-serif;
  --wide:  1240px;
}

/* ── Base ── */
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ── */
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 3rem; }

/* ── Typography Utilities ── */
.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}
.section-num {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 0.5rem;
}
.section-heading {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 0.5rem;
  margin-bottom: 3rem;
}

/* ── Divider ── */
hr.divider { border: none; border-top: 1px solid var(--border); }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--sans);
}
.btn--primary { background: var(--accent); color: white; }
.btn--primary:hover { background: var(--accent-mid); }
.btn--ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--border); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--dark-ghost { background: transparent; color: white; border: 1.5px solid rgba(255,255,255,0.2); }
.btn--dark-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero CTA buttons — larger variant used in hero section */
.btn--cta {
  padding: 0.95rem 2.4rem;
  font-size: 1rem;
  letter-spacing: 0.03em;
}
.btn--cta.btn--primary {
  box-shadow: 0 4px 18px rgba(15,102,116,0.28);
}
.btn--cta.btn--ghost {
  text-align: center;
}

/* ── Scroll Fade-in ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible { opacity: 1; transform: none; }

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,242,237,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 3rem;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); font-style: italic; }
.nav-links { display: flex; gap: 2.2rem; list-style: none; }
.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }