/* ═══════════════════════════════════════════
   BIO-TECH TERMINAL — patrykkurzeja.pl
   ═══════════════════════════════════════════ */

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-main:       #0A0F0D;
  --bg-secondary:  #0F1A17;
  --bg-card:       #111C18;
  --bg-card-hover: #152319;

  --text-main:   #E6F4EA;
  --text-muted:  #9FB3A8;

  --accent:       #22C55E;
  --accent-dark:  #15803D;
  --accent-glow:  #4ADE80;

  --accent-secondary: #60A5FA;

  --border:       #1F2937;
  --border-light: #243730;

  --font-head:     'Space Grotesk', system-ui, sans-serif;
  --font-body:     'Inter', system-ui, sans-serif;
  --font-mono:     'JetBrains Mono', 'Courier New', monospace;

  --radius:    6px;
  --radius-lg: 12px;

  --transition: 200ms ease;
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(34,197,94,.25); color: var(--text-main); }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Utility ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.accent { color: var(--accent); }
.muted  { color: var(--text-muted); }

.mono {
  font-family: var(--font-mono);
  font-size: .85em;
  letter-spacing: .02em;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #0A0F0D;
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent-glow);
  border-color: var(--accent-glow);
  box-shadow: 0 0 20px rgba(34,197,94,.35);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn--outline:hover {
  background: rgba(34,197,94,.08);
  box-shadow: 0 0 14px rgba(34,197,94,.25);
}

.btn--sm { padding: 8px 16px; font-size: .85rem; }

/* ── Section shared ── */
.section {
  padding: 96px 0;
  border-top: 1px solid var(--border);
}

.section__header {
  margin-bottom: 56px;
}

.section__label {
  display: block;
  color: var(--accent);
  margin-bottom: 12px;
  font-size: .8rem;
}

.section__header h2 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
}

/* ── Dot status ── */
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot--green {
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .4; }
}

/* ══════════════════════════════════════════
   NAV
══════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background var(--transition), border-bottom var(--transition);
}

.nav.scrolled {
  background: rgba(10,15,13,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav__logo {
  color: var(--accent);
  font-size: .9rem;
  white-space: nowrap;
  cursor: default;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  color: var(--text-muted);
  font-size: .9rem;
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--text-main); }

.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav__burger span {
  display: block;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav__burger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ══════════════════════════════════════════
   HERO
══════════════════════════════════════════ */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 96px 0 64px;
}

/* Background grid */
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(34,197,94,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34,197,94,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 80%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 64px;
  align-items: center;
}

.hero__terminal {
  color: var(--accent);
  font-size: .85rem;
  margin-bottom: 24px;
  min-height: 1.4em;
}

.hero__terminal::after {
  content: '▋';
  animation: blink 1s step-end infinite;
}

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

.hero__heading {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 20px;
}

.hero__sub {
  color: var(--text-muted);
  font-size: 1rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-size: .85rem;
  margin-bottom: 40px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Photo */
.hero__photo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero__photo-frame {
  position: relative;
  width: 280px;
}

.hero__photo-frame img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius-lg);
  filter: grayscale(20%) brightness(0.9) saturate(110%);
  display: block;
  position: relative;
  z-index: 1;
}

.hero__photo-border {
  position: absolute;
  inset: -3px;
  border-radius: calc(var(--radius-lg) + 3px);
  background: linear-gradient(135deg, var(--accent), transparent 60%, var(--accent-dark));
  z-index: -1;
  opacity: .7;
}

.hero__status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: .8rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  padding: 6px 14px;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: .75rem;
  animation: float 2.5s ease-in-out infinite;
  opacity: .5;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ══════════════════════════════════════════
   CARDS GRID (Co robię)
══════════════════════════════════════════ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition);
  cursor: default;
}

.card:hover {
  border-color: var(--accent-dark);
  background: var(--bg-card-hover);
  box-shadow: 0 0 24px rgba(34,197,94,.08);
  transform: translateY(-2px);
}

.card__icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: 18px;
}
.card__icon svg { width: 100%; height: 100%; }

.card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.card ul li {
  color: var(--text-muted);
  font-size: .88rem;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.card ul li:last-child { border-bottom: none; }
.card ul li::before {
  content: '— ';
  color: var(--accent-dark);
}

.card-sublist {
  margin-top: 6px;
  padding-left: 18px;
}

.card-sublist li {
  font-size: .84rem;
  color: var(--text-muted);
  border-bottom: none;
  padding: 2px 0;
}

.card-sublist li::before {
  content: '• ';
  color: var(--accent-dark);
}

/* ══════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition);
}

.project-card:hover {
  border-color: var(--accent-dark);
  background: var(--bg-card-hover);
  box-shadow: 0 0 28px rgba(34,197,94,.08);
  transform: translateY(-2px);
}

.project-card__header {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.project-card__number {
  color: var(--accent-dark);
  font-size: .8rem;
}

.project-card__header h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -.01em;
}

.label {
  color: var(--accent);
  display: block;
  font-size: .75rem;
  margin-bottom: 4px;
}

.project-card__problem,
.project-card__solution {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.project-card__stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.project-card__link {
  display: inline-block;
  font-size: .75rem;
  color: var(--accent-dark);
  transition: color var(--transition);
  padding-top: 4px;
}
.project-card__link:hover { color: var(--accent); }

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(34,197,94,.08);
  border: 1px solid rgba(34,197,94,.18);
  color: var(--accent);
  font-size: .75rem;
}

/* ══════════════════════════════════════════
   STACK
══════════════════════════════════════════ */
.stack-section { background: var(--bg-secondary); }

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
}

.stack-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
}

.stack-group h4 {
  color: var(--accent);
  font-size: .8rem;
  font-weight: 500;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}

.stack-group ul li {
  color: var(--text-muted);
  font-size: .875rem;
  padding: 5px 0;
}
.stack-group ul li::before {
  content: '• ';
  color: var(--accent-dark);
}

/* ══════════════════════════════════════════
   ABOUT
══════════════════════════════════════════ */
.about__inner {}

.about__content {
  max-width: 700px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about__text {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.about__text:first-child {
  color: var(--text-main);
  font-size: 1.05rem;
}

.about__meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-size: .82rem;
}

/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
.contact { background: var(--bg-secondary); }

.contact__terminal {
  color: var(--accent);
  font-size: .85rem;
  margin-bottom: 28px;
  min-height: 1.4em;
}

.contact__terminal::after {
  content: '▋';
  animation: blink 1s step-end infinite;
}

.contact__desc {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: .9rem;
  color: var(--text-muted);
  transition: all var(--transition);
}

.contact-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact-link:hover {
  color: var(--accent);
  border-color: var(--accent-dark);
  background: var(--bg-card-hover);
  box-shadow: 0 0 16px rgba(34,197,94,.12);
}

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: .8rem;
}

/* ══════════════════════════════════════════
   SCROLL ANIMATIONS
══════════════════════════════════════════ */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  .hero__cta { justify-content: center; }
  .hero__text { order: 2; }
  .hero__photo { order: 1; }
  .hero__photo-frame { width: 220px; }
  .hero__photo-frame img { height: 270px; }
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section__header { margin-bottom: 36px; }

  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(10,15,13,.97);
    backdrop-filter: blur(12px);
    padding: 80px 24px 40px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
  }
  .nav__links.open a { font-size: 1.1rem; color: var(--text-main); }
  .nav__burger { display: flex; z-index: 101; }

  .hero__heading { font-size: clamp(1.7rem, 8vw, 2.6rem); }

  .cards-grid,
  .projects-grid,
  .stack-grid { grid-template-columns: 1fr; }

  .about__meta { font-size: .78rem; }
  .contact__links { flex-direction: column; }
  .footer__inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .hero__photo-frame { width: 180px; }
  .hero__photo-frame img { height: 220px; }
}