/* ═══════════════════════════════════════════
   alexidec.pl — Design System & Styles
   Dark theme · #2952FF accent · Premium
   ═══════════════════════════════════════════ */

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

:root {
  --bg: #0a0a0c;
  --bg-2: #111114;
  --bg-3: #16161a;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);
  --accent: #2952FF;
  --accent-light: #4d6fff;
  --accent-dim: rgba(41,82,255,0.12);
  --text-primary: #f0f0f0;
  --text-secondary: #888897;
  --text-muted: #555562;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --nav-h: 72px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.6s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }

/* ─── SELECTION ─── */
::selection { background: var(--accent); color: #fff; }

/* ─── TYPOGRAPHY SCALE ─── */
h1, h2, h3, h4 {
  font-family: 'Syne', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5.5vw, 5rem); color: var(--white); }
h2 { font-size: clamp(2rem, 3.5vw, 3rem); color: var(--white); }
h3 { font-size: 1.25rem; color: var(--white); font-family: 'Plus Jakarta Sans', sans-serif; }
h4 { font-size: 1rem; }
p { color: var(--text-secondary); line-height: 1.7; }
a { text-decoration: none; color: inherit; }

/* ─── CONTAINER ─── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 100px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(41,82,255,0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-hover);
}
.btn-ghost:hover {
  border-color: var(--text-primary);
  color: var(--white);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

.btn-large {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ─── SECTION TAGS ─── */
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  margin-top: 8px;
}

/* ─── SECTIONS ─── */
.section {
  padding: 120px 0;
}

.section-alt {
  background: var(--bg-2);
}

/* ═══════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
}

#navbar.scrolled {
  background: rgba(10,10,12,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo:hover { color: var(--accent-light); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: 24px;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: var(--white);
  background: rgba(255,255,255,0.06);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 6px 14px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-secondary);
}

.lang-toggle:hover {
  border-color: var(--border-hover);
  color: var(--white);
}

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

/* Active language */
body.lang-pl .lang-pl-label { color: var(--white); }
body.lang-en .lang-en-label { color: var(--white); }

.nav-cta { display: inline-flex; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: rgba(10,10,12,0.98);
  backdrop-filter: blur(24px);
  border-top: 1px solid var(--border);
  padding: 24px;
}

.mobile-menu.open { display: block; }

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu ul a {
  display: block;
  padding: 12px 16px;
  color: var(--text-secondary);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.mobile-menu ul a:hover { color: var(--white); background: rgba(255,255,255,0.05); }
.mobile-menu .btn-primary { margin-top: 16px; justify-content: center; }

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

/* Background grid of project images */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  height: 100%;
  gap: 2px;
}

.grid-item {
  overflow: hidden;
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: grayscale(60%);
  transform: scale(1.05);
  transition: all 8s ease;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 40% 50%,
    rgba(10,10,12,0.2) 0%,
    rgba(10,10,12,0.75) 50%,
    rgba(10,10,12,0.97) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  padding-bottom: 80px;
  width: 100%;
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 32px;
  backdrop-filter: blur(8px);
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,0.2);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 3px rgba(34,197,94,0.2); }
  50%       { box-shadow: 0 0 0 6px rgba(34,197,94,0.05); }
}

#hero h1 {
  max-width: 14ch;
  margin-bottom: 24px;
}

.hero-sub {
  max-width: 52ch;
  font-size: 1.1rem;
  margin-bottom: 40px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-meta {
  display: flex;
  gap: 48px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2.5s ease-in-out infinite;
  z-index: 1;
  transition: color var(--transition);
}

.scroll-indicator:hover { color: var(--text-secondary); }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ═══════════════════════════════════════════
   SERVICES
   ═══════════════════════════════════════════ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  background: var(--bg);
  padding: 40px 36px;
  position: relative;
  transition: background var(--transition);
  cursor: default;
}

.service-card:hover {
  background: var(--bg-3);
}

.section-alt .service-card {
  background: var(--bg-2);
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--accent-light);
  margin-bottom: 20px;
}

.service-icon svg { width: 100%; height: 100%; }

.service-card h3 {
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.service-card p {
  font-size: 0.88rem;
  line-height: 1.65;
}

.service-arrow {
  position: absolute;
  top: 36px;
  right: 36px;
  font-size: 1.1rem;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(-6px);
  transition: all var(--transition);
}

.service-card:hover .service-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent-light);
}

/* ═══════════════════════════════════════════
   PORTFOLIO
   ═══════════════════════════════════════════ */
.portfolio-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 100px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--white);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.portfolio-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: opacity var(--transition), transform var(--transition);
}

.portfolio-item.hidden {
  display: none;
}

.portfolio-thumb {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-3);
}

.portfolio-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
  display: block;
}

.portfolio-item:hover .portfolio-thumb img {
  transform: scale(1.06);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,12,0.96) 0%, rgba(10,10,12,0.4) 50%, transparent 100%);
  display: flex;
  align-items: flex-end;
  padding: 24px;
  opacity: 0;
  transition: opacity var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-info { width: 100%; }

.portfolio-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 6px;
}

.portfolio-info h4 {
  color: var(--white);
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.portfolio-info p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ═══════════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════════ */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text .section-tag { margin-bottom: 8px; }

.about-text h2 {
  margin-bottom: 28px;
}

.about-text p {
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.about-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 36px;
}

/* Tools */
.about-tools h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}

.tool-chip {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  border: 1px solid var(--border);
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: border-color var(--transition), color var(--transition);
}

.tool-chip:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.highlight-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}

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

.highlight-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  width: 40px;
  text-align: center;
}

.highlight-card strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
}

.highlight-card small {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════
   EXPERIENCE TIMELINE
   ═══════════════════════════════════════════ */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-left: 56px;
  padding-bottom: 56px;
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: 8px;
  top: 6px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-2);
  transition: background var(--transition);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
}

.timeline-content {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  transition: border-color var(--transition), transform var(--transition);
}

.timeline-item:hover .timeline-content {
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}

.timeline-header h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.timeline-role {
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 600;
}

.timeline-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  padding-top: 4px;
}

.timeline-content p {
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════════ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-info .section-tag { margin-bottom: 8px; }

.contact-info h2 {
  margin-bottom: 16px;
  line-height: 1.15;
}

.contact-info > p {
  font-size: 1.05rem;
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--border-hover);
  color: var(--white);
  transform: translateX(4px);
}

.contact-link-icon { font-size: 1.1rem; }

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  background: var(--bg-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  color: var(--white);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(41,82,255,0.15);
}

.form-success {
  display: none;
  text-align: center;
  color: #22c55e;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 12px;
  background: rgba(34,197,94,0.08);
  border-radius: var(--radius-sm);
}

.form-success.visible { display: block; }

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer-inner p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* ═══════════════════════════════════════════
   REVEAL ANIMATIONS
   ═══════════════════════════════════════════ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4,0,0.2,1), transform 0.7s cubic-bezier(0.4,0,0.2,1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
[data-reveal]:nth-child(2) { transition-delay: 0.08s; }
[data-reveal]:nth-child(3) { transition-delay: 0.16s; }
[data-reveal]:nth-child(4) { transition-delay: 0.24s; }
[data-reveal]:nth-child(5) { transition-delay: 0.32s; }
[data-reveal]:nth-child(6) { transition-delay: 0.40s; }

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .about-layout { grid-template-columns: 1fr; gap: 56px; }
  .contact-layout { grid-template-columns: 1fr; gap: 56px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }

  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }

  .hero-grid { grid-template-columns: repeat(2, 1fr); }

  h1 { font-size: clamp(2rem, 8vw, 3.5rem); }
  .hero-meta { gap: 32px; }

  .services-grid {
    grid-template-columns: 1fr;
    border-radius: var(--radius-md);
  }

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

  .timeline::before { left: 12px; }
  .timeline-item { padding-left: 40px; }
  .timeline-dot { left: 4px; width: 15px; height: 15px; }
  .timeline-header { flex-direction: column; gap: 6px; }
  .timeline-content { padding: 20px 24px; }

  .footer-inner { flex-direction: column; text-align: center; }

  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .about-actions { flex-direction: column; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-grid { grid-template-columns: 1fr; }
  .portfolio-filters { gap: 6px; }
  .filter-btn { padding: 7px 14px; font-size: 0.8rem; }
}