/* ---------- Design tokens ---------- */
:root {
  --brand: #1f4cff;
  --brand-dark: #0f2fb8;
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --bg-dark: #0e1530;
  --surface: #ffffff;
  --text: #0e1530;
  --text-muted: #5b6178;
  --text-on-dark: #e7ebf7;
  --text-on-dark-muted: #9aa3c2;
  --border: #e6e8ef;
  --shadow-sm: 0 4px 14px rgba(15, 24, 60, 0.06);
  --shadow: 0 8px 30px rgba(15, 24, 60, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 24, 60, 0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --container: 1180px;

  font-family: 'Figtree', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

/* ---------- Typography ---------- */
h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.15;
}
h3 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
p { color: var(--text-muted); }

/* ---------- Layout primitives ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.section {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  position: relative;
}
.section--soft { background: var(--bg-soft); }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 0.85rem;
}

.section-head { text-align: center; margin-bottom: 2rem; max-width: 720px; margin-inline: auto; }
.section-head p { margin-top: 0.75rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, color 160ms ease;
}
.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 6px 18px rgba(31, 76, 255, 0.25);
}
.btn--primary:hover { background: var(--brand-dark); transform: translateY(-1px); box-shadow: 0 10px 24px rgba(31, 76, 255, 0.32); }
.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn--ghost:hover { border-color: var(--text); transform: translateY(-1px); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}
.site-header .logo { display: flex; align-items: center; }
.site-header .logo img { height: 52px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 160ms ease;
}
.nav-links a:hover { color: var(--brand); }
.nav-cta { margin-left: 0.5rem; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 22px; height: 22px; }

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60%;
  aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(31, 76, 255, 0.18), rgba(31, 76, 255, 0));
  pointer-events: none;
  z-index: 0;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-text p.lede {
  font-size: 1.15rem;
  margin-top: 1.25rem;
  max-width: 36ch;
}
.hero-text h1 { margin-top: 0.5rem; }
.hero-actions {
  display: flex;
  gap: 0.85rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

/* Hero collage: 2×2 phone tiles, lightly rotated */
.collage {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  padding: 1rem;
  max-width: 320px;
  margin: 0 auto;
}
.collage img {
  width: 100%;
  aspect-ratio: 9 / 19;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  background: #fff;
  transition: transform 300ms ease;
}
.collage img:nth-child(1) { transform: rotate(-3deg) translateY(6px); }
.collage img:nth-child(2) { transform: rotate(2deg) translateY(-8px); }
.collage img:nth-child(3) { transform: rotate(2deg) translateY(-4px); }
.collage img:nth-child(4) { transform: rotate(-3deg) translateY(6px); }

/* ---------- About ---------- */
.about-card {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.about-card .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.85rem 0.4rem 0.45rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.about-card .badge img { width: 22px; height: 22px; border-radius: 999px; }
.about-card p { font-size: 1.1rem; margin-top: 1rem; }

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: transparent;
}
.service-card .icon-wrap {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(31, 76, 255, 0.08);
  color: var(--brand);
  margin-bottom: 1.25rem;
}
.service-card .icon-wrap svg { width: 24px; height: 24px; }
.service-card h3 { margin-bottom: 0.5rem; }

/* ---------- Projects (Personal Projects) ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 200ms ease, box-shadow 200ms ease;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
.project-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.project-card .image-wrap {
  background: var(--bg-soft);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  width: 100%;
}
.project-card .image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-card .body {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.project-card h3 { margin-bottom: 0.5rem; }

/* ---------- Games (Personal games) ---------- */
.personal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.personal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 200ms ease, box-shadow 200ms ease;
  text-decoration: none;
  color: inherit;
}
.personal-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.personal-card .image-wrap {
  background: var(--bg-soft);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  width: 100%;
}
.personal-card .image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.personal-card .body {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.personal-card h3 { margin-bottom: 0.5rem; }

/* ---------- App store buttons ---------- */
.store-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--bg-dark);
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.store-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.store-btn svg { width: 22px; height: 22px; flex-shrink: 0; }
.store-btn__label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  color: #fff;
}
.store-btn__label small {
  font-size: 0.62rem;
  font-weight: 400;
  opacity: 0.65;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- YouTube embed ---------- */
.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  margin-top: 2.5rem;
  box-shadow: var(--shadow-lg);
}
.video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- Project subpages ---------- */
.project-page {
  padding: clamp(3rem, 6vw, 5rem) 0 clamp(4rem, 8vw, 7rem);
}
.project-page .personal-card {
  max-width: 800px;
  margin-inline: auto;
}
.project-page .video-wrap {
  max-width: 800px;
  margin-inline: auto;
}

/* ---------- Past projects ---------- */
.past-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.past-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.past-tile {
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: #fff;
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.past-tile img {
  width: 100%;
  height: auto;
  display: block;
}
.past-tile:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow);
}

/* ---------- Contact ---------- */
.contact {
  text-align: center;
}
.contact .container { max-width: 720px; }
.contact p { margin-top: 1rem; font-size: 1.1rem; }
.contact-actions {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}
.socials {
  display: flex;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.socials a {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--text);
  transition: transform 160ms ease, color 160ms ease, border-color 160ms ease;
}
.socials a:hover { color: var(--brand); border-color: var(--brand); transform: translateY(-2px); }
.socials svg { width: 20px; height: 20px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-on-dark-muted);
  padding-block: 2.5rem;
  font-size: 0.9rem;
}
.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.site-footer .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-footer .socials a { border-color: rgba(255,255,255,0.12); color: var(--text-on-dark); }
.site-footer .socials a:hover { color: #fff; border-color: #fff; }
.site-footer .tagline { color: var(--text-on-dark-muted); }

/* ---------- Focus styles ---------- */
:where(a, button, .btn, input, .nav-toggle):focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; gap: 2.5rem; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .personal-grid { grid-template-columns: repeat(2, 1fr); }
  .past-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 720px) {
  .projects-grid { grid-template-columns: 1fr; }
  .personal-grid { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { padding: 0.65rem 0; border-bottom: 1px solid var(--border); }
  .nav-links li:last-child { border-bottom: none; }
  .nav-cta { margin-left: 0; margin-top: 0.5rem; }
  .nav-toggle { display: inline-flex; }
  .site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(10px); }

  .services-grid { grid-template-columns: 1fr; }
  .past-grid { grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
  .past-col { gap: 0.75rem; }

  .collage { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; padding: 0.5rem; }
  .collage img { aspect-ratio: 9 / 18; }

  .site-footer .row { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .past-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .collage img { transform: none !important; }
}