:root {
  --blue-900: #0e2a5c;
  --blue-800: #143a86;
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;
  --ink: #12203f;
  --muted: #5b6b8c;
  --white: #ffffff;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(29, 78, 216, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'SN Pro', system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
}

.container { width: min(1120px, 92%); margin: 0 auto; }

h1, h2, h3 { font-weight: 800; line-height: 1.15; margin: 0 0 0.5em; }
a { color: var(--blue-700); }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--blue-100);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; text-decoration: none; color: var(--blue-800); }
.logo__mark {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: #fff; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; font-weight: 600;
}
.nav__links { display: flex; align-items: center; gap: 26px; }
.nav__links a { text-decoration: none; color: var(--ink); font-weight: 700; font-size: 0.95rem; transition: color 0.2s; }
.nav__links a:hover { color: var(--blue-600); }
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 8px; cursor: pointer; }
.burger span { width: 24px; height: 3px; border-radius: 3px; background: var(--blue-800); transition: 0.25s; }

/* Buttons */
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 999px; border: 0;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
  color: #fff; font-weight: 700; font-size: 1rem; text-decoration: none; cursor: pointer;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(37, 99, 235, 0.45); }
.btn--ghost { background: #fff; color: var(--blue-700); border: 2px solid var(--blue-600); box-shadow: none; }
.btn--sm { padding: 9px 20px; font-size: 0.9rem; }
.btn--white { background: #fff; color: var(--blue-800); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18); }

/* Hero */
.hero {
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(59, 130, 246, 0.25), transparent 60%),
    linear-gradient(180deg, var(--blue-50), #fff 75%);
  padding: 70px 0 80px;
  overflow: hidden;
}
.hero__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.badge {
  display: inline-block; padding: 7px 16px; border-radius: 999px;
  background: var(--blue-100); color: var(--blue-800); font-weight: 700; font-size: 0.85rem;
}
.hero h1 { font-size: clamp(2rem, 4.5vw, 3.3rem); margin-top: 18px; color: var(--blue-900); }
.hero h1 em { font-style: normal; color: var(--blue-600); }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 34rem; }
.lead--light { color: #cfe0ff; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.stats { display: flex; gap: 34px; margin-top: 36px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat strong { font-size: 2rem; font-weight: 800; color: var(--blue-700); }
.stat span { font-size: 0.88rem; color: var(--muted); }

.hero__card { position: relative; }
.code-window {
  background: var(--blue-900); border-radius: var(--radius); box-shadow: var(--shadow);
  overflow: hidden; transform: rotate(1.5deg);
}
.code-window__bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; background: var(--blue-800); }
.code-window__bar i { width: 11px; height: 11px; border-radius: 50%; background: #7ea6ff; }
.code-window__bar span { margin-left: 10px; color: #a9c3ff; font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; }
.code-window__body { margin: 0; padding: 20px; color: #dbeafe; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; line-height: 1.7; overflow-x: auto; }
.c-kw { color: #7dd3fc; } .c-cls { color: #fbbf24; } .c-fn { color: #93c5fd; }
.c-num { color: #f0abfc; } .c-str { color: #86efac; } .c-cm { color: #6f8ccb; }
.hero__avatar {
  position: absolute; right: -14px; bottom: -24px; width: 96px; height: 96px;
  border-radius: 50%; overflow: hidden; box-shadow: var(--shadow); background: #fff;
}

/* Sections */
.section { padding: 76px 0; }
.section--tint { background: var(--blue-50); }
.section__title { font-size: clamp(1.6rem, 3vw, 2.3rem); color: var(--blue-900); text-align: center; }
.section__title--light { color: #fff; text-align: left; }
.section__sub { text-align: center; color: var(--muted); max-width: 40rem; margin: -6px auto 28px; }

/* About */
.about__grid { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 28px; margin-top: 30px; }
.about__card { background: #fff; border: 2px solid var(--blue-100); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.about__card p { margin-top: 0; color: var(--muted); }
.about__list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.about__list li { background: var(--blue-50); border-radius: 12px; padding: 11px 15px; font-weight: 600; }
.about__side { display: grid; gap: 18px; align-content: start; }
.mini-card {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-800)); color: #fff;
  border-radius: var(--radius); padding: 22px 24px; display: grid; gap: 4px;
}
.mini-card__num { font-size: 2rem; font-weight: 800; }
.mini-card span:last-child { font-size: 0.92rem; opacity: 0.9; }

/* Skills */
.skills__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 34px; }
.skill {
  background: #fff; border-radius: var(--radius); padding: 26px; border: 1px solid var(--blue-100);
  transition: transform 0.25s, box-shadow 0.25s;
}
.skill:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.skill__icon {
  width: 54px; height: 54px; display: grid; place-items: center; font-size: 1.6rem;
  background: var(--blue-100); border-radius: 14px; margin-bottom: 14px;
}
.skill h3 { font-size: 1.1rem; color: var(--blue-800); }
.skill p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.bars { margin-top: 36px; display: grid; gap: 16px; max-width: 720px; margin-inline: auto; }
.bar { display: grid; grid-template-columns: 190px 1fr; align-items: center; gap: 14px; font-weight: 700; font-size: 0.92rem; }
.bar__track { height: 12px; background: #fff; border: 1px solid var(--blue-100); border-radius: 999px; overflow: hidden; }
.bar__track i {
  display: block; height: 100%; width: 0; border-radius: 999px;
  background: linear-gradient(90deg, var(--blue-500), var(--blue-800));
  transition: width 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.bars.is-visible .bar__track i { width: var(--v); }

/* Timeline */
.timeline { max-width: 780px; margin: 34px auto 0; display: grid; gap: 22px; position: relative; }
.timeline::before {
  content: ''; position: absolute; left: 118px; top: 6px; bottom: 6px; width: 3px;
  background: linear-gradient(180deg, var(--blue-600), var(--blue-100));
}
.tl { display: grid; grid-template-columns: 105px 1fr; gap: 34px; position: relative; }
.tl__year { text-align: right; font-weight: 800; color: var(--blue-700); font-size: 0.9rem; padding-top: 4px; }
.tl__body {
  background: #fff; border: 1px solid var(--blue-100); border-radius: var(--radius);
  padding: 22px 26px; box-shadow: var(--shadow); position: relative;
}
.tl__body::before {
  content: ''; position: absolute; left: -43px; top: 24px; width: 15px; height: 15px;
  border-radius: 50%; background: #fff; border: 4px solid var(--blue-600);
}
.tl__body h3 { font-size: 1.08rem; color: var(--blue-900); margin-bottom: 2px; }
.tl__place { color: var(--blue-600); font-weight: 700; margin: 0 0 8px; font-size: 0.92rem; }
.tl__body p:last-child { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Gallery */
.filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 28px; }
.chip {
  padding: 9px 20px; border-radius: 999px; border: 2px solid var(--blue-600);
  background: #fff; color: var(--blue-700); font-weight: 700; font-size: 0.9rem; cursor: pointer;
  transition: 0.2s;
}
.chip:hover { background: var(--blue-100); }
.chip.is-active { background: var(--blue-600); color: #fff; }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.gallery__item {
  margin: 0; background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--blue-100); box-shadow: var(--shadow); cursor: zoom-in;
  transition: transform 0.25s;
}
.gallery__item:hover { transform: translateY(-5px); }
.gallery__item.is-hidden { display: none; }
.gallery__item img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--blue-50); }
.gallery__item figcaption { padding: 13px 16px; font-weight: 700; font-size: 0.92rem; color: var(--blue-900); }

/* Reviews */
.reviews__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 34px; }
.review {
  margin: 0; background: #fff; border: 1px solid var(--blue-100); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.stars { color: #f8b500; letter-spacing: 3px; font-size: 1.1rem; }
.review p { color: var(--muted); font-size: 0.97rem; }
.review footer { font-weight: 700; color: var(--blue-800); font-size: 0.9rem; }

/* Contact */
.section--cta {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  color: #fff;
}
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.contact__list { list-style: none; padding: 0; display: grid; gap: 12px; margin-top: 24px; font-size: 1.02rem; }
.contact__list a { color: #fff; font-weight: 700; }
.form { background: #fff; border-radius: var(--radius); padding: 28px; display: grid; gap: 16px; box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2); }
.form label { display: grid; gap: 6px; font-weight: 700; font-size: 0.9rem; color: var(--blue-900); }
.form input, .form textarea {
  padding: 12px 14px; border: 2px solid var(--blue-100); border-radius: 12px;
  font: inherit; color: var(--ink); background: var(--blue-50); resize: vertical;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--blue-600); background: #fff; }
.form__ok { margin: 0; font-weight: 700; color: var(--blue-700); }

/* Footer */
.footer { background: var(--blue-900); color: #b9ccf5; padding: 22px 0; font-size: 0.9rem; }
.footer__row { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.footer a { color: #fff; text-decoration: none; font-weight: 700; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(10, 24, 55, 0.92);
  display: flex; align-items: center; justify-content: center; gap: 18px; padding: 24px;
}
.lightbox[hidden] { display: none; }
.lightbox figure { margin: 0; max-width: min(900px, 100%); text-align: center; }
.lightbox img { max-width: 100%; max-height: 74vh; border-radius: 14px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5); }
.lightbox figcaption { color: #dbeafe; margin-top: 14px; font-weight: 700; }
.lightbox button {
  background: rgba(255, 255, 255, 0.12); border: 0; color: #fff; cursor: pointer;
  width: 48px; height: 48px; border-radius: 50%; font-size: 1.5rem; line-height: 1;
  transition: background 0.2s;
}
.lightbox button:hover { background: var(--blue-600); }
.lightbox__close { position: absolute; top: 20px; right: 20px; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 900px) {
  .hero__grid, .about__grid, .contact__grid { grid-template-columns: 1fr; }
  .skills__grid, .gallery, .reviews__grid { grid-template-columns: repeat(2, 1fr); }
  .hero__card { max-width: 520px; }
  .timeline::before { left: 8px; }
  .tl { grid-template-columns: 1fr; gap: 8px; padding-left: 34px; }
  .tl__year { text-align: left; }
  .tl__body::before { left: -34px; }
}
@media (max-width: 640px) {
  .skills__grid, .gallery, .reviews__grid { grid-template-columns: 1fr; }
  .bar { grid-template-columns: 1fr; gap: 6px; }
  .burger { display: flex; }
  .nav__links {
    position: absolute; top: 66px; left: 0; right: 0; flex-direction: column;
    background: #fff; padding: 18px 6vw 24px; gap: 16px; border-bottom: 2px solid var(--blue-100);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .stats { gap: 22px; }
}