/* ============================================================
   Benjamin DiBuono — Precision Motorsport Portfolio
   Dark technical base, sky-blue accent, Space Grotesk / Inter.
   ============================================================ */

:root {
  --bg: #070B12;
  --surface: #111827;
  --text: #F8FAFC;
  --text-soft: #94A3B8;
  --accent: #38BDF8;
  --accent-hover: #0EA5E9;
  --border: #1E293B;
  --heading: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --body: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", Consolas, monospace;
  --radius: 10px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--body);
  color: var(--text);
  background-color: var(--bg);
  /* faint technical grid */
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  line-height: 1.7;
  font-size: 16.5px;
}

h1, h2, h3, h4 { font-family: var(--heading); letter-spacing: -0.01em; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 28px; }

/* ---------- scroll progress bar ---------- */
#progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  z-index: 300;
  transition: width 0.08s linear;
}

/* ---------- sticky nav ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(7, 11, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav .brand {
  font-family: var(--heading);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  letter-spacing: 0.01em;
}
.nav .brand .dot { color: var(--accent); }
.nav .brand:hover { color: var(--accent); }

.nav ul { list-style: none; display: flex; gap: 6px; margin: 0; padding: 0; }

.nav ul a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-soft);
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav ul a:hover { color: var(--text); }
.nav ul a.active {
  color: var(--accent);
  border-color: var(--border);
  background: rgba(56, 189, 248, 0.08);
}

.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--text); font-size: 1.5rem; cursor: pointer;
  padding: 4px 8px;
}

.nav ul a.linkedin-link {
  display: flex;
  align-items: center;
  padding: 7px 10px;
  color: var(--text-soft);
}
.nav ul a.linkedin-link:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero {
  padding: 130px 0 110px;
  position: relative;
  overflow: hidden;
}
/* radial glow */
.hero::before {
  content: "";
  position: absolute;
  top: -240px; right: -160px;
  width: 720px; height: 720px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.13) 0%, transparent 62%);
  pointer-events: none;
}

.hero .kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 4.3rem);
  line-height: 1.05;
  margin: 0 0 22px;
  font-weight: 700;
}

.hero p.lead {
  font-size: 1.22rem;
  color: var(--text-soft);
  max-width: 640px;
  margin: 0 0 30px;
}

.pill-row { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 38px; }
.pill {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-soft);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.6);
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--heading);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #06121d; }
.btn-primary:hover { background: var(--accent-hover); color: #06121d; box-shadow: 0 6px 24px rgba(56, 189, 248, 0.35); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- section scaffolding ---------- */
section { padding: 96px 0; position: relative; }

.section-heading { margin-bottom: 56px; }
.section-heading .kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 14px;
}
.section-heading h2 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); margin: 0 0 12px; }
.section-heading p { color: var(--text-soft); max-width: 660px; margin: 0; font-size: 1.05rem; }

/* ---------- case studies ---------- */
.case-study {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.case-study:first-of-type { border-top: none; padding-top: 24px; }
.case-study.flip .case-text { order: 2; }
.case-study.flip .case-media { order: 1; }

.case-text .num {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.case-text h3 { font-size: 1.7rem; margin: 0 0 10px; }
.case-text .summary { color: var(--text-soft); font-size: 1.06rem; margin: 0 0 18px; }

.case-text .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-soft);
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.case-block { margin-bottom: 20px; }
.case-block h4 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 7px;
}
.case-block p { margin: 0; color: var(--text-soft); font-size: 0.97rem; }

.case-stat {
  display: inline-block;
  margin-top: 8px;
  padding: 12px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.case-stat .num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent);
  display: block;
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0;
}
.case-stat .desc {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}

/* media column: one main image + supporting images */
.case-media { display: flex; flex-direction: column; gap: 16px; }
.media-frame {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.media-frame:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 32px rgba(56, 189, 248, 0.12);
}
.media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
.media-frame.placeholder {
  min-height: 220px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
  font-family: var(--mono); font-size: 0.72rem;
  background:
    repeating-linear-gradient(-45deg, transparent, transparent 14px, rgba(148,163,184,0.04) 14px, rgba(148,163,184,0.04) 28px),
    var(--surface);
}
.media-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.media-row .media-frame.placeholder { min-height: 140px; }
.media-caption {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-soft);
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: rgba(7, 11, 18, 0.4);
}

/* sticky project indicator (desktop) */
.project-indicator {
  position: sticky;
  top: 40vh;
  float: left;
  margin-left: -72px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 50;
}
.project-indicator a {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-soft);
  border-left: 2px solid var(--border);
  padding-left: 10px;
  line-height: 1.4;
}
.project-indicator a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}

/* ---------- about ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  align-items: start;
}

.about-photo {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  position: relative;
}
.about-photo img { display: block; width: 100%; }
.about-photo.placeholder {
  min-height: 340px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-soft); font-family: var(--mono); font-size: 0.72rem;
}

.about-text p { color: var(--text-soft); margin: 0 0 18px; }
.about-text p strong { color: var(--text); font-weight: 600; }

/* documents row inside about */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 40px;
}
.doc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex; flex-direction: column; gap: 8px;
  color: var(--text);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
a.doc-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 28px rgba(56, 189, 248, 0.12);
  color: var(--text);
}
.doc-card .doc-type {
  font-family: var(--mono); font-size: 0.64rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent);
}
.doc-card h3 { margin: 0; font-size: 1rem; }
.doc-card p { margin: 0; color: var(--text-soft); font-size: 0.84rem; }

/* ---------- contact / footer ---------- */
.contact {
  text-align: center;
  padding: 110px 0 90px;
}
.contact h2 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin: 0 0 14px; }
.contact p { color: var(--text-soft); max-width: 520px; margin: 0 auto 34px; }
.contact .cta-row { justify-content: center; }

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 30px 0;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 14px;
  font-family: var(--mono); font-size: 0.76rem;
  color: var(--text-soft);
}
.footer-inner a { color: var(--text-soft); }
.footer-inner a:hover { color: var(--accent); }
.social-links { display: flex; gap: 22px; }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn:hover, .media-frame:hover, a.doc-card:hover { transform: none; }
  #progress-bar { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1240px) {
  .project-indicator { display: none; }
}

@media (max-width: 900px) {
  .case-study { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .case-study.flip .case-text { order: 1; }
  .case-study.flip .case-media { order: 2; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 320px; }
}

@media (max-width: 760px) {
  .nav ul {
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(7, 11, 18, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column; padding: 18px 28px; gap: 12px;
    display: none;
    border-bottom: 1px solid var(--border);
  }
  .nav ul.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { padding: 80px 0 64px; }
  section { padding: 64px 0; }
}