/* ==========================================================================
   Luigi Dalcanale — personal site
   Light theme default, dark theme via [data-theme="dark"]
   ========================================================================== */

:root {
  /* palette — light */
  --bg: #fbfcfe;
  --bg-tint: #f1f5fb;
  --surface: #ffffff;
  --ink: #12263f;
  --ink-soft: #44586f;
  --ink-faint: #7a8ba0;
  --navy: #0b2545;
  --accent: #1a66d6;
  --accent-soft: #e3edfb;
  --line: #dde6f0;
  --shadow: 0 10px 30px -12px rgba(11, 37, 69, 0.14);
  --shadow-lift: 0 18px 44px -14px rgba(11, 37, 69, 0.22);

  /* type */
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Instrument Sans", "Helvetica Neue", sans-serif;
  --font-mono: "Spline Sans Mono", ui-monospace, monospace;

  --radius: 14px;
  --container: 1080px;
}

[data-theme="dark"] {
  --bg: #0a1626;
  --bg-tint: #0e1d31;
  --surface: #12233a;
  --ink: #e8eef7;
  --ink-soft: #b3c2d6;
  --ink-faint: #7d90a9;
  --navy: #dce7f6;
  --accent: #6fa8ff;
  --accent-soft: #1b3355;
  --line: #22375433;
  --line: #223754;
  --shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.5);
  --shadow-lift: 0 18px 44px -14px rgba(0, 0, 0, 0.65);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 1.0625rem;
  transition: background 0.35s ease, color 0.35s ease;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }

::selection { background: var(--accent); color: #fff; }

/* ---------- typography ---------- */

h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.15; color: var(--navy); }

h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); letter-spacing: -0.01em; margin-bottom: 1.4rem; }
h3 { font-size: 1.18rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.mono { font-family: var(--font-mono); }

a { color: var(--accent); text-decoration: none; }

/* ---------- header / nav ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 600; color: var(--navy);
}
.brand-dot { color: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 1.6rem; }

.nav-links > a {
  color: var(--ink-soft); font-size: 0.95rem; font-weight: 500;
  position: relative; transition: color 0.2s;
}
.nav-links > a::after {
  content: ""; position: absolute; left: 0; bottom: -5px; height: 2px; width: 0;
  background: var(--accent); transition: width 0.25s ease;
}
.nav-links > a:hover { color: var(--accent); }
.nav-links > a:hover::after { width: 100%; }

.nav-cta { color: var(--accent) !important; }

.lang-switch {
  display: flex; align-items: center; gap: 0.15rem;
  font-family: var(--font-mono); font-size: 0.78rem;
  border: 1px solid var(--line); border-radius: 999px; padding: 0.2rem 0.45rem;
  background: var(--surface);
}
.lang-switch a {
  color: var(--ink-faint); padding: 0.1rem 0.42rem; border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}
.lang-switch a:hover { color: var(--accent); }
.lang-switch a.active { color: #fff; background: var(--accent); }

.theme-toggle {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
  cursor: pointer; transition: transform 0.25s ease, color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: rotate(15deg); }
[data-theme="dark"] .icon-moon { display: none; }
.icon-sun { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

.nav-burger { display: none; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-burger span {
  display: block; width: 22px; height: 2px; margin: 5px 0;
  background: var(--ink); border-radius: 2px; transition: transform 0.25s, opacity 0.25s;
}

/* ---------- hero ---------- */

.hero { position: relative; overflow: hidden; padding: 5.5rem 0 6rem; }

.hero-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 55% 60% at 85% 10%, var(--accent-soft) 0%, transparent 65%),
    radial-gradient(ellipse 40% 45% at 8% 90%, var(--accent-soft) 0%, transparent 70%),
    repeating-linear-gradient(90deg, transparent 0 119px, color-mix(in srgb, var(--line) 55%, transparent) 119px 120px);
  mask-image: linear-gradient(to bottom, black 60%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent);
}

.hero-grid {
  position: relative;
  display: grid; grid-template-columns: 1.25fr 0.75fr;
  gap: 3.5rem; align-items: center;
}

.hero-sub {
  font-family: var(--font-display); font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  color: var(--ink-soft); margin: 1.2rem 0 1rem; line-height: 1.45;
}
.hero-sub em { color: var(--accent); font-style: italic; }

.hero-body { color: var(--ink-soft); max-width: 46ch; margin-bottom: 1.8rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }

.hero-langs {
  display: flex; gap: 0.6rem; list-style: none; margin-top: 1.8rem;
}
.hero-langs li {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em;
  padding: 0.28rem 0.75rem; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-faint); background: var(--surface);
}

/* photo */
.hero-photo { justify-self: center; }

.photo-frame {
  position: relative; width: min(320px, 72vw); aspect-ratio: 4 / 5;
  border-radius: var(--radius);
}
.photo-frame::before {
  content: ""; position: absolute; inset: 0;
  transform: translate(14px, 14px);
  border-radius: var(--radius);
  border: 2px solid var(--accent);
  opacity: 0.55;
}
.photo-frame img {
  position: relative; width: 100%; height: 100%; object-fit: cover;
  border-radius: var(--radius); box-shadow: var(--shadow-lift);
  display: block;
}
.photo-fallback {
  position: absolute; inset: 0; display: none; place-items: center;
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--navy), var(--accent));
  box-shadow: var(--shadow-lift);
}
[data-theme="dark"] .photo-fallback { background: linear-gradient(145deg, #16385f, var(--accent)); }
.photo-fallback span {
  font-family: var(--font-display); font-size: 4.5rem; color: #fff; letter-spacing: 0.04em;
}
.photo-frame.no-img img { display: none; }
.photo-frame.no-img .photo-fallback { display: grid; }

/* ---------- logo marquee ---------- */

.marquee-strip {
  padding: 2.6rem 0 2.9rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  transition: background 0.35s ease;
}

.marquee-label {
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 500;
  color: var(--ink-faint); text-align: center; margin-bottom: 1.8rem;
}

.marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
}

.marquee-track {
  display: flex; width: max-content;
  animation: marquee-scroll 38s linear infinite;
}

.marquee-set {
  display: flex; align-items: center;
  gap: 3.2rem; padding-right: 3.2rem;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }  /* track holds 2 identical sets → one-set shift loops seamlessly */
}

.brand-mark {
  display: flex; align-items: center;
  padding: 0.45rem 0.75rem; border-radius: 12px;
  cursor: default;
  transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.brand-mark img {
  height: 32px; width: auto; display: block;
  filter: grayscale(1) opacity(0.55);
  transition: filter 0.3s ease;
}
.brand-mark img.logo-mid { height: 38px; }   /* stacked / script marks: IU, Bread King, Chick-fil-A, Wawa */
.brand-mark img.logo-tall { height: 44px; }  /* round seal: IRS */

[data-theme="dark"] .brand-mark img { filter: grayscale(1) invert(1) brightness(1.75) opacity(0.5); }

/* text fallback if a logo file fails to load */
.brand-name {
  display: none;
  font-family: var(--font-display); font-size: 1.32rem; font-weight: 600;
  white-space: nowrap; color: var(--ink-faint); opacity: 0.6;
  transition: color 0.3s ease, opacity 0.3s ease;
}
.brand-mark.img-fail img { display: none; }
.brand-mark.img-fail .brand-name { display: block; }

@media (hover: hover) {
  .marquee:hover .marquee-track { animation-play-state: paused; }
  .brand-mark:hover { transform: scale(1.07); }
  .brand-mark:hover img { filter: none; }
  /* dark theme: light chip behind the logo so original brand colors stay readable */
  [data-theme="dark"] .brand-mark:hover { background: #f6f9fd; box-shadow: 0 6px 20px -8px rgba(0, 0, 0, 0.55); }
  .brand-mark.img-fail:hover .brand-name { color: var(--brand); opacity: 1; }
  [data-theme="dark"] .brand-mark.img-fail:hover .brand-name { color: var(--brand-dark, var(--brand)); }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.72rem 1.4rem; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem; font-family: var(--font-body);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s, color 0.18s, border-color 0.18s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { box-shadow: var(--shadow-lift); }

.btn-outline { border: 1.5px solid var(--accent); color: var(--accent); }
.btn-outline:hover { background: var(--accent-soft); }

.btn-ghost { color: var(--ink-soft); }
.btn-ghost:hover { color: var(--accent); }

.btn-lg { padding: 0.9rem 1.7rem; font-size: 1rem; }

/* ---------- sections ---------- */

.section { padding: 5.5rem 0; }
.section-tint { background: var(--bg-tint); transition: background 0.35s ease; }

/* ---------- about ---------- */

.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 3.5rem; align-items: start; }

.about-copy p { margin-bottom: 1.1rem; color: var(--ink-soft); }
.about-copy p:first-of-type { color: var(--ink); }

.about-facts {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.8rem; box-shadow: var(--shadow);
  display: grid; gap: 1.2rem;
}
.fact { display: grid; gap: 0.15rem; font-size: 0.95rem; color: var(--ink-soft); }
.fact-label {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--accent);
}

/* ---------- timeline ---------- */

.timeline { margin-top: 3rem; display: grid; gap: 2.2rem; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 148px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--accent) 0%, var(--line) 100%);
  opacity: 0.5;
}

.tl-item { display: grid; grid-template-columns: 120px 1fr; gap: 3.2rem; position: relative; }
.tl-item::before {
  content: ""; position: absolute; left: 143.5px; top: 8px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2.5px solid var(--accent);
}

.tl-when {
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.4rem;
  font-size: 0.8rem; color: var(--ink-faint); padding-top: 0.35rem; text-align: right;
}
.tl-badge {
  font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--accent); background: var(--accent-soft);
  padding: 0.15rem 0.6rem; border-radius: 999px;
}

.tl-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem 1.8rem; box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
}
.tl-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }

.tl-co { color: var(--accent); }
.tl-loc { font-size: 0.85rem; color: var(--ink-faint); margin: 0.25rem 0 0.9rem; }
.tl-card ul { padding-left: 1.1rem; display: grid; gap: 0.45rem; color: var(--ink-soft); font-size: 0.97rem; }
.tl-card li::marker { color: var(--accent); }
.tl-prose { color: var(--ink-soft); font-size: 0.97rem; }
.tl-card-roots { background: linear-gradient(135deg, var(--surface) 60%, var(--accent-soft)); }

/* ---------- projects ---------- */

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem; margin-top: 3rem; }

.project-card {
  display: flex; flex-direction: column; gap: 0.8rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.8rem; box-shadow: var(--shadow); color: inherit;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
}
a.project-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); border-color: var(--accent); }
a.project-card:hover .project-arrow { transform: translate(3px, -3px); color: var(--accent); }

.project-top { display: flex; justify-content: space-between; align-items: center; }
.project-tag {
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--accent); background: var(--accent-soft); padding: 0.25rem 0.7rem; border-radius: 999px;
}
.project-arrow { font-size: 1.2rem; color: var(--ink-faint); transition: transform 0.2s ease, color 0.2s; }

.project-card p { color: var(--ink-soft); font-size: 0.95rem; flex-grow: 1; }
.project-link { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); }

/* ---------- service ---------- */

.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6rem; margin-top: 3rem; }

.service-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.8rem; box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.service-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }

.service-stat {
  display: inline-block; font-family: var(--font-display); font-size: 2rem;
  color: var(--accent); margin-bottom: 0.5rem;
}
.service-card h3 { margin-bottom: 0.5rem; }
.service-card p { color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- skills ---------- */

.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2.4rem 3rem; margin-top: 3rem; }

.skill-group h3 { margin-bottom: 1rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--line); }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 0.55rem; }
.chips li {
  font-size: 0.88rem; padding: 0.38rem 0.9rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
}
.chips li:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.chips-cert li { background: var(--accent-soft); border-color: transparent; color: var(--accent); font-weight: 500; }

/* ---------- contact ---------- */

.section-contact {
  background:
    radial-gradient(ellipse 60% 80% at 50% 120%, var(--accent-soft) 0%, transparent 70%),
    var(--bg-tint);
  transition: background 0.35s ease;
}
.contact-inner { text-align: center; max-width: 640px; }
.contact-inner .hero-actions { justify-content: center; margin-top: 2rem; }
.contact-copy { color: var(--ink-soft); }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--line); padding: 1.6rem 0; }
.footer-inner {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
  font-size: 0.85rem; color: var(--ink-faint);
}
.footer-note a { color: var(--ink-soft); }
.footer-note a:hover { color: var(--accent); }

/* ---------- animations ---------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal-load { opacity: 0; animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards; animation-delay: calc(var(--d, 0) * 110ms); }

/* scroll reveals only apply when JS is running (html.js set in <head>) */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.65s ease, transform 0.65s cubic-bezier(0.22, 1, 0.36, 1); }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-load { animation: none; opacity: 1; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .tl-card, .project-card, .service-card, .chips li { transition: none; }

  /* marquee becomes a static, wrapped logo row */
  .marquee { -webkit-mask-image: none; mask-image: none; }
  .marquee-track { animation: none; width: auto; }
  .marquee-set { flex-wrap: wrap; justify-content: center; padding: 0 1.5rem; row-gap: 1.1rem; }
  .marquee-set[aria-hidden="true"] { display: none; }
  .brand-mark { transform: none !important; }
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-photo { order: -1; justify-self: start; }
  .photo-frame { width: min(240px, 60vw); }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .project-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }

  .timeline::before { left: 5px; }
  .tl-item { grid-template-columns: 1fr; gap: 0.7rem; padding-left: 2rem; }
  .tl-item::before { left: 0.5px; }
  .tl-when { flex-direction: row; align-items: center; justify-content: flex-start; padding-top: 0; }
}

@media (max-width: 760px) {
  .nav-burger { display: block; }
  .nav-links {
    position: fixed; top: 66px; right: 0; left: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 0.5rem 1.5rem 1rem;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links > a { padding: 0.7rem 0; width: 100%; }
  .lang-switch { margin-top: 0.6rem; }
  .theme-toggle { margin-top: 0.6rem; }

  .nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero { padding: 3.5rem 0 4rem; }
  .section { padding: 4rem 0; }

  .marquee-strip { padding: 2rem 0 2.2rem; }
  .marquee-set { gap: 1.9rem; padding-right: 1.9rem; }
  .brand-mark img { height: 25px; }
  .brand-mark img.logo-mid { height: 30px; }
  .brand-mark img.logo-tall { height: 35px; }
  .brand-name { font-size: 1.1rem; }
  .marquee-track { animation-duration: 28s; }
}