/* ===== MaxZ portfolio — minimal light ===== */
:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --border: #e6e8ec;
  --text: #14171f;
  --muted: #6b7280;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --radius: 14px;
  --maxw: 1080px;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 8px 24px rgba(16,24,40,.06);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 96px 0; }

/* ===== Nav ===== */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em; }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--muted); font-size: .93rem; font-weight: 500; transition: color .15s; }
.nav-links a:hover { color: var(--text); }

.lang { display: flex; gap: 2px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang button {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: .8rem; font-weight: 600; color: var(--muted);
  padding: 5px 11px; border-radius: 999px; transition: all .15s;
}
.lang button.active { background: var(--bg); color: var(--accent); box-shadow: var(--shadow); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; font-size: 1.5rem; color: var(--text); }

/* ===== Hero ===== */
.hero { padding-top: 120px; padding-bottom: 90px; }
.hero-greet { color: var(--accent); font-weight: 600; font-size: 1rem; margin-bottom: 14px; }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.05; letter-spacing: -.035em; font-weight: 800; }
.hero h1 .name { color: #3730a3; }
.hero h1 .aka { color: var(--muted); font-size: .4em; font-weight: 700; letter-spacing: -.01em; vertical-align: middle; margin-left: .18em; white-space: nowrap; }
.hero-role { font-size: clamp(1.15rem, 3vw, 1.6rem); color: var(--text); font-weight: 600; margin-top: 10px; letter-spacing: -.02em; }
.hero-tag { color: var(--muted); font-size: 1.1rem; max-width: 620px; margin-top: 20px; }
.hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: .95rem;
  transition: transform .12s, box-shadow .15s, background .15s; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(79,70,229,.28); }
.btn-ghost { background: var(--bg); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-soft); transform: translateY(-2px); }
.hero-socials { display: flex; gap: 18px; margin-top: 34px; }
.hero-socials a { color: var(--muted); font-size: .9rem; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; transition: color .15s; }
.hero-socials a:hover { color: var(--accent); }

/* ===== Section heading ===== */
.sec-head { margin-bottom: 48px; }
.sec-kicker { color: var(--accent); font-weight: 600; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; }
.sec-head h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); letter-spacing: -.03em; font-weight: 800; margin-top: 10px; }
.sec-head p { color: var(--muted); margin-top: 12px; max-width: 640px; }

/* ===== About ===== */
.about { background: var(--bg-soft); }
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: start; }
.about-text p { color: var(--muted); margin-bottom: 18px; font-size: 1.05rem; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.stat .num { font-size: 2rem; font-weight: 800; color: var(--accent); letter-spacing: -.03em; }
.stat .lbl { color: var(--muted); font-size: .88rem; margin-top: 4px; }

/* ===== Skills ===== */
.chips { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  background: var(--bg); border: 1px solid var(--border); border-radius: 999px;
  padding: 9px 18px; font-size: .92rem; font-weight: 500; color: var(--text);
  transition: all .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ===== Projects ===== */
.proj-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; transition: transform .18s, box-shadow .2s, border-color .2s; display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d5d8e0; }
.card-badge { display: inline-block; font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: 5px 12px; border-radius: 999px; align-self: flex-start; }
.card h3 { font-size: 1.4rem; letter-spacing: -.02em; margin-top: 16px; font-weight: 700; }
.card p { color: var(--muted); margin-top: 12px; flex-grow: 1; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.card-tags span { font-size: .78rem; color: var(--muted); background: var(--bg-soft); border: 1px solid var(--border); padding: 4px 10px; border-radius: 6px; }
.card-links { display: flex; gap: 18px; margin-top: 22px; }
.card-links a { font-size: .9rem; font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 5px; }
.card-links a:hover { text-decoration: underline; }

/* ===== Contact ===== */
.contact { background: var(--bg-soft); text-align: center; }
.contact .sec-head { margin-bottom: 32px; }
.contact-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
footer { border-top: 1px solid var(--border); padding: 32px 0; text-align: center; color: var(--muted); font-size: .88rem; }

/* ===== i18n visibility ===== */
[data-lang-block] { display: none; }
[data-lang-block].on { display: block; }

/* ===== Responsive ===== */
@media (max-width: 820px) {
  .about-grid, .proj-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 66px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 20px 24px; gap: 18px;
  }
  section { padding: 72px 0; }
  .hero { padding-top: 80px; }
}