@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

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

:root {
  --bg: #0d0d0d;
  --surface: #161616;
  --border: #2a2a2a;
  --text: #e0e0e0;
  --muted: #666;
  --accent: #7fff7f;
  --accent-dim: #4db34d;
  --font: 'Space Mono', 'Courier New', monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.7;
  min-height: 100vh;
}

/* ── nav ───────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(6px);
  z-index: 100;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* ── hero ──────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 56px);
  padding: 3rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* subtle grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-screen {
  position: relative;
  width: 100%;
  max-width: 860px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  padding: 0;
  box-shadow: 0 0 80px rgba(127, 255, 127, 0.04), 0 0 0 1px var(--border);
  overflow: hidden;
}

/* browser-style title bar */
.screen-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: #111;
  border-bottom: 1px solid var(--border);
}

.screen-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.screen-dot.red   { background: #ff5f56; }
.screen-dot.yellow{ background: #ffbd2e; }
.screen-dot.green { background: #27c93f; }

.screen-url {
  flex: 1;
  margin-left: 0.75rem;
  padding: 0.2rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* terminal body */
.screen-body {
  padding: 3rem 2.5rem 3.5rem;
  text-align: left;
}

.prompt-line {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.prompt-prefix {
  color: var(--accent-dim);
  flex-shrink: 0;
}

.hero-heading {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero-heading .cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--accent);
  margin-left: 4px;
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-subtext {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-subtext svg {
  color: var(--accent-dim);
  flex-shrink: 0;
}

.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.2rem;
  font-family: var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #0d0d0d;
  border: 1px solid var(--accent);
  font-weight: 700;
}
.btn-primary:hover {
  background: #a0ffb0;
  border-color: #a0ffb0;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text);
}

/* ── kosice clock widget ──────────────────────────── */
.hero-clock {
  position: absolute;
  bottom: 1.25rem;
  right: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.hero-clock svg {
  color: var(--accent-dim);
  flex-shrink: 0;
}

.hero-clock a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero-clock a:hover {
  text-decoration: underline;
}

/* ── skills / icons strip ──────────────────────────── */
.icons-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}

.icon-item:hover {
  color: var(--accent);
}

.icon-item img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.icon-item[aria-label="Arduino"] img {
  width: auto;
  height: 28px;
}

.icon-item .icon-hover {
  display: none;
}

.icon-item:hover .icon-default {
  display: none;
}

.icon-item:hover .icon-hover {
  display: block;
}

/* ── sections ──────────────────────────────────────── */
section {
  max-width: 760px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--accent-dim);
  margin-bottom: 0.75rem;
  text-transform: none;
}

.section-title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.section-text {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.9;
  max-width: 560px;
}

.section-text + .section-text {
  margin-top: 1rem;
}

/* projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.project-card:hover {
  border-color: var(--accent-dim);
}

.project-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.project-card-header svg {
  color: var(--accent-dim);
}

.project-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
}

.project-desc {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.7;
}

.project-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.tag {
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* ── divider ───────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── footer ────────────────────────────────────────── */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ── responsive ────────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links { display: none; }
  .screen-body { padding: 2rem 1.25rem 2.5rem; }
  .hero-actions { flex-direction: column; }
  footer { flex-direction: column; align-items: flex-start; }
}