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

:root {
  --text: #1a1a1a;
  --text-light: #555;
  --text-muted: #888;
  --border: #e0e0e0;
  --bg: #fff;
  --bg-subtle: #f8f8f8;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.2s;
}

a:hover {
  border-color: var(--text);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ─── Reveal Animations ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  animation: fadeIn 1.2s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Hero ─── */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, rgba(0,0,0,0.02) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  will-change: transform, opacity;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-bold {
  font-weight: 500;
}

.hero-tagline {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  font-style: italic;
  margin-top: 1rem;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  font-size: 1.5rem;
  color: var(--text-muted);
  transition: opacity 0.3s;
  animation: float 2s ease-in-out infinite;
}

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

/* ─── Section Labels ─── */
.section-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

/* ─── About ─── */
.about {
  padding: 6rem 0 4rem;
}

.about-lead {
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.about-text {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ─── Parallax Sections ─── */
.parallax-section {
  position: relative;
  overflow: hidden;
}

.parallax-section .container {
  will-change: transform;
}

/* ─── Services ─── */
.services {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.service:nth-child(2) { transition-delay: 0.1s; }
.service:nth-child(3) { transition-delay: 0.2s; }

.service h3 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.service p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ─── Open Source ─── */
.opensource {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.project {
  display: block;
  padding: 1.25rem;
  background: var(--bg);
  border: none;
  transition: background 0.2s;
}

.project:nth-child(2) { transition-delay: 0.05s; }
.project:nth-child(3) { transition-delay: 0.1s; }
.project:nth-child(4) { transition-delay: 0.15s; }
.project:nth-child(5) { transition-delay: 0.2s; }
.project:nth-child(6) { transition-delay: 0.25s; }
.project:nth-child(7) { transition-delay: 0.3s; }
.project:nth-child(8) { transition-delay: 0.35s; }

.project:hover {
  background: var(--bg-subtle);
}

.project h3 {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}

.project p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── CTA ─── */
.cta {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  text-align: center;
}

.cta-heading {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}

.cta-sub {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 2.2rem;
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.2s, color 0.2s;
}

.btn:hover {
  background: var(--bg);
  color: var(--text);
}

.cta-link {
  font-size: 0.9rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
}

.cta-link:hover {
  color: var(--text);
  border-color: var(--text);
}

/* ─── Connect ─── */
.connect {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.connect-links {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
}

.connect-links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  border-bottom: none;
  transition: color 0.2s;
}

.connect-links a:hover {
  color: var(--text);
}

.connect-links svg {
  flex-shrink: 0;
}

/* ─── Footer ─── */
footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

footer nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

footer a {
  color: var(--text-muted);
}

/* ─── Contact Form (kontakt.html) ─── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-row {
  display: flex;
  gap: 0.75rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 0;
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s;
  -webkit-appearance: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--text);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.form-bottom {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-form button {
  padding: 0.65rem 2rem;
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  font-family: inherit;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  flex-shrink: 0;
}

.contact-form button:hover {
  background: var(--bg);
  color: var(--text);
}

.contact-form button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-status {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ─── Legal pages ─── */
.legal {
  padding: 4rem 0;
}

.legal h1 {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
}

.legal h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text);
}

.legal p,
.legal ul {
  margin-bottom: 1rem;
  color: var(--text-light);
  font-size: 0.95rem;
}

.legal ul {
  padding-left: 1.25rem;
}

.legal a {
  color: var(--text-light);
}

.back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ─── Responsive ─── */
@media (max-width: 560px) {
  .about-lead {
    font-size: 1.2rem;
  }

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

  .cta-actions {
    flex-direction: column;
    gap: 1rem;
  }

  .form-row {
    flex-direction: column;
  }

  .form-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-form button {
    width: 100%;
    text-align: center;
  }

  .connect-links {
    gap: 1.5rem;
  }
}