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

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #1c2330;
  --border: #30363d;
  --accent: #58a6ff;
  --accent-purple: #a371f7;
  --accent2: #3d8bcd;
  --green: #3fb950;
  --teal: #2dd4bf;
  --text: #e6edf3;
  --text2: #8b949e;
  --text3: #c9d1d9;
  --tag-bg: #1f2937;
  --tag-text: #60a5fa;
  --grad: linear-gradient(135deg, var(--accent), var(--accent-purple));
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 15% 0%, rgba(88,166,255,0.07) 0%, transparent 65%),
    radial-gradient(ellipse 55% 40% at 85% 0%, rgba(163,113,247,0.07) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

nav, .hero, .section, footer { position: relative; z-index: 1; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 56px;
  gap: 1.5rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: 0.5px;
}

.nav-logo span { color: var(--accent); }

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav ul a {
  color: var(--text2);
  font-size: 0.875rem;
  transition: color 0.2s;
}

nav ul a:hover { color: var(--accent); text-decoration: none; }

/* ── HERO ── */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: 0.3px;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text3);
  max-width: 560px;
  font-size: 1.0rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0d1117;
}

.btn-primary:hover { background: #79b8ff; text-decoration: none; }

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text3);
  background: transparent;
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.hero-photo {
  position: relative;
}

.photo-circle {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: 0 0 0 6px rgba(88,166,255,0.08);
  flex-shrink: 0;
}

.photo-circle img {
  width: 116%;
  height: auto;
  display: block;
  margin-left: -8%;
  margin-top: 3%;
}

/* ── SECTIONS ── */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  white-space: nowrap;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
  margin-left: 0.5rem;
}

.section-title .icon {
  font-size: 1.1rem;
}

/* ── O MNIE ── */
.about-text {
  color: var(--text3);
  max-width: 800px;
  font-size: 1.0rem;
  line-height: 1.8;
}

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

.about-text strong { color: var(--text); }

/* ── SKILLS GRID ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.25rem;
}

.skill-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4rem;
  transition: border-color 0.2s, transform 0.2s;
}

.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.skill-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-card h3 .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.skill-card ul {
  list-style: none;
  margin-bottom: 1rem;
}

.skill-card ul li {
  color: var(--text2);
  font-size: 0.875rem;
  padding: 0.2rem 0;
  padding-left: 1rem;
  position: relative;
}

.skill-card ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  background: rgba(88,166,255,0.1);
  color: var(--accent);
  border: 1px solid rgba(88,166,255,0.2);
  border-radius: 4px;
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  font-weight: 500;
}

/* ── REALIZACJE ── */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: border-color 0.2s;
  position: relative;
  overflow: hidden;
}

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

.project-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.project-card p {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.project-card ul {
  list-style: none;
  margin-bottom: 1rem;
}

.project-card ul li {
  color: var(--text3);
  font-size: 0.875rem;
  padding: 0.2rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.project-card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}

.effect-box {
  background: rgba(63,185,80,0.06);
  border: 1px solid rgba(63,185,80,0.2);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-top: 0.75rem;
}

.effect-box .effect-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.3rem;
}

.effect-box p {
  font-size: 0.875rem;
  color: var(--text3);
  margin: 0;
}

/* ── WSPÓŁPRACA ── */
.collab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.collab-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  font-size: 0.9rem;
  color: var(--text3);
  transition: border-color 0.2s;
}

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

.collab-card strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
}

.collab-note {
  color: var(--text2);
  font-size: 0.9rem;
  font-style: italic;
}

.tags-mt { margin-top: 1rem; }
.tag-link { cursor: pointer; }

/* ── CONTACT ── */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.contact-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: border-color 0.2s;
}

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

.contact-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.contact-label {
  font-size: 0.7rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.1rem;
}

.contact-value {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
  overflow-wrap: break-word;
  word-break: break-all;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  text-align: center;
  color: var(--text2);
  font-size: 0.8rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 3rem 1.5rem 2.5rem;
  }

  .hero-photo {
    order: -1;
    display: flex;
    justify-content: center;
  }

  .photo-circle { width: 160px; height: 160px; }

  .hero-desc { max-width: 100%; }

  .hero-cta { justify-content: center; }

  nav { padding: 0 1rem; gap: 0.25rem; }
  nav ul { gap: 0.4rem; flex-shrink: 1; min-width: 0; }
  nav ul a { font-size: 0.75rem; white-space: nowrap; }

  .section { padding: 2.5rem 1.5rem; }

  .skills-grid { grid-template-columns: 1fr; }
}