/* =====================================================
   SingerLand — hlavný stylesheet
   Dark mode (default) + Light mode ([data-theme="light"])
   ===================================================== */

:root {
  --bg: #0a0a0a;
  --bg2: #111111;
  --bg3: #1a1a1a;
  --border: rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.15);
  --text: #f0ece4;
  --muted: #888880;
  --accent: #c8f542;
  --accent2: #a0e020;
  --accent-dim: rgba(200, 245, 66, 0.12);
  --accent-dim2: rgba(200, 245, 66, 0.06);
  --red: #ff5a3c;
  --blue: #4a9eff;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

[data-theme="light"] {
  --bg: #f5f4f0;
  --bg2: #eeede8;
  --bg3: #e4e3de;
  --border: rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.15);
  --text: #1a1a18;
  --muted: #6b6b65;
  --accent: #5a9a00;
  --accent2: #4a8200;
  --accent-dim: rgba(90, 154, 0, 0.10);
  --accent-dim2: rgba(90, 154, 0, 0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: 0.4;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1001;
  padding: 1.25rem max((100vw - 1200px) / 2, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px);
}

[data-theme="light"] nav {
  background: rgba(245,244,240,0.88);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

.nav-right { display: flex; align-items: center; gap: 1rem; }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--bg);
  background: var(--accent);
  text-decoration: none;
  padding: 0.5rem 1.25rem;
  border-radius: 2px;
  font-weight: 500;
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--accent2); transform: translateY(-1px); }

/* THEME + LANG TOGGLE */
.nav-toggle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border2);
  padding: 0.35rem 0.65rem;
  border-radius: 2px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  text-decoration: none;
}
.nav-toggle:hover { color: var(--text); border-color: var(--text); }

/* HERO */
.hero { min-height: 100vh; padding-top: 80px; position: relative; overflow: hidden; }

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1200px;
  margin: 0 auto;
  min-height: calc(100vh - 80px);
}

.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

.hero-left {
  padding: 5rem 2.5rem;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; z-index: 2;
}

.hero-tag {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 2rem;
}
.hero-tag::before { content: ''; display: block; width: 24px; height: 1px; background: var(--accent); }

h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 800; line-height: 0.95;
  letter-spacing: -0.04em; margin-bottom: 1.5rem;
}
h1 .line2 { display: block; color: var(--accent); }
.hero-name-row { display: flex; flex-direction: row; align-items: stretch; gap: 1rem; }
.hero-name-block { display: block; }
h1 .hero-nick { writing-mode: vertical-rl; transform: rotate(180deg); font-family: var(--font-display); font-size: 0.32em; font-weight: 800; color: var(--muted); letter-spacing: 0.15em; display: flex; align-items: center; }
h1 .line3 { display: block; font-weight: 400; font-style: italic; color: var(--muted); font-size: 0.7em; }

.hero-desc { font-size: 1rem; color: var(--muted); max-width: 420px; margin-bottom: 2.5rem; line-height: 1.8; font-weight: 300; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.06em;
  color: var(--bg); background: var(--accent);
  text-decoration: none; padding: 0.875rem 1.75rem; border-radius: 2px;
  font-weight: 500; transition: all 0.2s;
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-2px); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.06em;
  color: var(--muted); background: transparent;
  text-decoration: none; padding: 0.875rem 1.75rem;
  border: 1px solid var(--border2); border-radius: 2px; transition: all 0.2s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text); }

.hero-right {
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 2; padding: 4rem 2.5rem;
}

.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 4px;
  overflow: hidden; width: 100%; max-width: 400px;
}

.stat-box { background: var(--bg2); padding: 2rem 1.75rem; transition: background 0.2s; }
.stat-box:hover { background: var(--bg3); }
.stat-box.accent-box { background: var(--accent-dim); grid-column: span 2; border-top: 1px solid rgba(200,245,66,0.2); }

.stat-num { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; letter-spacing: -0.04em; color: var(--text); line-height: 1; margin-bottom: 0.375rem; }
.stat-num.green { color: var(--accent); }
.stat-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }

.open-source-badge { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent); letter-spacing: 0.05em; margin-top: 0.75rem; }

/* MARQUEE */
.marquee-wrap { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg2); overflow: hidden; padding: 1rem 0; }
.marquee-inner { display: flex; gap: 3rem; animation: marquee 20s linear infinite; white-space: nowrap; }
.marquee-item { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); flex-shrink: 0; }
.marquee-item strong { color: var(--accent); font-weight: 500; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* SECTIONS */
section { padding: 6rem 2.5rem; max-width: 1200px; margin: 0 auto; }

.section-tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.75rem; }
.section-tag::after { content: ''; flex: 1; height: 1px; background: var(--border2); }

h2 { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1; margin-bottom: 1.5rem; }

/* ABOUT */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; margin-top: 3rem; }
.about-text p { color: var(--muted); margin-bottom: 1.25rem; font-weight: 300; font-size: 1.05rem; }
.about-text p strong { color: var(--text); font-weight: 500; }

.timeline { border-left: 1px solid var(--border2); padding-left: 1.5rem; margin-top: 0.5rem; }
.timeline-item { position: relative; margin-bottom: 1.5rem; }
.timeline-item::before { content: ''; position: absolute; left: -1.625rem; top: 0.45rem; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.timeline-year { font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.08em; margin-bottom: 0.2rem; }
.timeline-desc { font-size: 0.9rem; color: var(--muted); }

/* CARDS */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; margin-top: 3rem; }
.card { background: var(--bg2); padding: 2rem; transition: background 0.25s; position: relative; }
.card:hover { background: var(--bg3); }
.card-num { font-family: var(--font-display); font-size: 4rem; font-weight: 800; color: var(--border2); line-height: 1; margin-bottom: 1rem; letter-spacing: -0.06em; }
.card h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.75rem; }
.card p { font-size: 0.9rem; color: var(--muted); line-height: 1.7; font-weight: 300; }
.card-tag { display: inline-block; font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.25rem 0.6rem; background: var(--accent-dim); color: var(--accent); border-radius: 2px; margin-bottom: 1rem; }

/* PROJECTS */
.projects-list { margin-top: 3rem; display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.project-row { display: grid; grid-template-columns: auto 1fr auto; align-items: start; gap: 2rem; padding: 1.5rem 2rem; background: var(--bg2); transition: background 0.2s; }
.project-row:hover { background: var(--bg3); }
.project-row:hover .proj-arrow { color: var(--accent); transform: translate(2px, -2px); }
.proj-index { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); width: 1.5rem; padding-top: 0.2rem; }
.proj-name { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; }
.proj-tags { display: flex; gap: 0.5rem; margin-top: 0.25rem; flex-wrap: wrap; }
.proj-tag { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.06em; color: var(--muted); background: rgba(255,255,255,0.04); padding: 0.15rem 0.5rem; border-radius: 2px; border: 1px solid var(--border); }
.proj-desc { font-size: 0.85rem; color: var(--muted); font-weight: 300; line-height: 1.6; margin-top: 0.5rem; }
.proj-github { display: inline-flex; align-items: center; gap: 0.35rem; font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.05em; margin-top: 0.6rem; text-decoration: none; opacity: 0.8; transition: opacity 0.2s; }
.proj-github:hover { opacity: 1; }
.proj-arrow { font-size: 1.1rem; color: var(--border2); transition: all 0.2s; padding-top: 0.2rem; }

/* BLOG */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; margin-top: 3rem; }
.blog-card { background: var(--bg2); padding: 2rem; transition: background 0.2s; text-decoration: none; color: inherit; display: block; }
.blog-card:hover { background: var(--bg3); }
.blog-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.06em; margin-bottom: 0.75rem; }
.blog-card h3 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.75rem; line-height: 1.2; }
.blog-card p { font-size: 0.875rem; color: var(--muted); line-height: 1.7; font-weight: 300; }
.blog-older { display: inline-flex; align-items: center; margin-top: 2rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); text-decoration: none; letter-spacing: 0.05em; opacity: 0.8; transition: opacity 0.2s; }
.blog-older:hover { opacity: 1; }

/* BLOG DETAIL */
.blog-detail { max-width: 760px; margin: 0 auto; padding: 7rem 2.5rem 5rem; }
.blog-detail-meta { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.blog-detail-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.06em; }
.blog-detail h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 0; line-height: 1.1; }
.blog-detail-content { margin-top: 3rem; font-size: 1.05rem; line-height: 1.85; color: var(--muted); font-weight: 300; }
.blog-detail-content h2, .blog-detail-content h3 { color: var(--text); margin: 2.5rem 0 1rem; }
.blog-detail-content p { margin-bottom: 1.5rem; }
.blog-detail-content a { color: var(--accent); }
.blog-detail-content strong { color: var(--text); font-weight: 500; }
.blog-detail-content ul, .blog-detail-content ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
.blog-detail-content li { margin-bottom: 0.4rem; }
.blog-detail-content pre { margin: 1.5rem 0; border-radius: 4px; overflow-x: auto; border: 1px solid var(--border2); }
.blog-detail-content code:not(pre code) { font-family: var(--font-mono); font-size: 0.875em; background: var(--bg3); padding: 0.15em 0.4em; border-radius: 2px; color: var(--accent); }
.blog-detail-content blockquote { border-left: 3px solid var(--accent); padding-left: 1.25rem; margin: 1.5rem 0; color: var(--muted); }

.blog-share { display: flex; align-items: center; gap: 0.75rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); flex-wrap: wrap; }
.blog-share-label { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-right: 0.5rem; }
.share-btn { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); text-decoration: none; border: 1px solid var(--border2); border-radius: 3px; padding: 0.35rem 0.75rem; transition: color 0.2s, border-color 0.2s; }
.share-btn:hover { color: var(--accent); border-color: var(--accent); }

.blog-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--border); gap: 1rem; flex-wrap: wrap; }
.blog-nav a { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); text-decoration: none; letter-spacing: 0.04em; transition: color 0.2s; }
.blog-nav a:hover { color: var(--accent); }

/* ARCHIVE */
.archive-list { margin-top: 3rem; display: flex; flex-direction: column; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.archive-item { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1.5rem; padding: 1.25rem 2rem; background: var(--bg2); text-decoration: none; color: inherit; transition: background 0.2s; }
.archive-item:hover { background: var(--bg3); }
.archive-item-title { font-family: var(--font-display); font-size: 1rem; font-weight: 600; letter-spacing: -0.02em; }
.archive-item-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.05em; white-space: nowrap; }

.pagination { display: flex; gap: 0.5rem; margin-top: 2rem; justify-content: center; flex-wrap: wrap; }
.pagination a, .pagination span { font-family: var(--font-mono); font-size: 0.75rem; padding: 0.5rem 0.875rem; border: 1px solid var(--border2); border-radius: 2px; text-decoration: none; color: var(--muted); transition: all 0.2s; }
.pagination a:hover { color: var(--text); border-color: var(--text); }
.pagination span.active { color: var(--bg); background: var(--accent); border-color: var(--accent); }

/* CONTACT */
.contact-wrap { border: 1px solid var(--border); border-radius: 4px; overflow: hidden; margin-top: 3rem; }
.contact-left { background: var(--accent); padding: 3rem; display: flex; flex-direction: column; justify-content: space-between; }
.contact-left h3 { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--bg); letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 1rem; }
.contact-left p { color: rgba(10,10,10,0.65); font-size: 0.925rem; font-weight: 300; }
.contact-links { margin-top: 2rem; display: flex; flex-direction: column; gap: 0.75rem; }
.contact-link { display: flex; align-items: center; gap: 0.75rem; font-family: var(--font-mono); font-size: 0.8rem; color: rgba(10,10,10,0.7); text-decoration: none; transition: color 0.2s; }
.contact-link:hover { color: var(--bg); }
.contact-link-icon { width: 32px; height: 32px; background: rgba(10,10,10,0.1); border-radius: 2px; display: flex; align-items: center; justify-content: center; font-size: 0.75rem; }

/* FOOTER */
footer { border-top: 1px solid var(--border); padding: 2rem 2.5rem; display: flex; align-items: center; justify-content: space-between; max-width: 1200px; margin: 0 auto; }
.footer-logo { font-family: var(--font-display); font-weight: 800; font-size: 0.95rem; letter-spacing: -0.02em; color: var(--muted); }
.footer-logo span { color: var(--accent); }
.footer-copy { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.05em; }

/* DIVIDER */
.divider { width: 100%; max-width: 1200px; margin: 0 auto; height: 1px; background: var(--border); }

/* ANIMATE IN */
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.hero-left > * { animation: fadeUp 0.6s ease both; }
.hero-left > *:nth-child(1) { animation-delay: 0.1s; }
.hero-left > *:nth-child(2) { animation-delay: 0.2s; }
.hero-left > *:nth-child(3) { animation-delay: 0.3s; }
.hero-left > *:nth-child(4) { animation-delay: 0.4s; }
.hero-right { animation: fadeUp 0.6s 0.3s ease both; }

/* RESPONSIVE */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  section { padding: 4rem 1.5rem; }
  .blog-detail { padding: 6rem 1.5rem 4rem; }
  footer { flex-direction: column; gap: 0.75rem; text-align: center; }
}