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

:root {
  --bg:      #0d0d0d;
  --surface: #161616;
  --border:  #282828;
  --orange:  #FF6B35;
  --yellow:  #FFD166;
  --text:    #f0f0f0;
  --muted:   #666;
  --font-sans: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

* {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

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


/* ── Layout helpers ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}
.section { padding: 120px 0; }

/* ── Nav ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.4rem 2.5rem;
  transition: background .4s, backdrop-filter .4s;
}
.nav.scrolled {
  background: rgba(13,13,13,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: .95rem;
  color: var(--text);
  letter-spacing: .08em;
}
.nav-links {
  list-style: none;
  display: flex; gap: 2.5rem;
}
.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative;
  padding: 0 2rem;
  overflow: hidden;
}
.hero-noise {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 256px;
  pointer-events: none;
  opacity: .5;
}
/* Gradient blob */
.hero::before {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(255,107,53,.18) 0%, transparent 70%);
  top: -200px; right: -200px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(255,209,102,.10) 0%, transparent 70%);
  bottom: -100px; left: 0;
  pointer-events: none;
}

.hero-content {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding-top: 6rem;
  position: relative; z-index: 1;
}
.hero-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 1.5rem;
}
.hero-name {
  font-family: var(--font-sans);
  font-size: clamp(4rem, 11vw, 9rem);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.03em;
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 3rem;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem; left: 2rem;
  display: flex; align-items: center; gap: .75rem;
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-scroll-line {
  width: 40px; height: 1px;
  background: var(--border);
  position: relative; overflow: hidden;
}
.hero-scroll-line::after {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--orange);
  animation: slide-line 1.8s ease-in-out infinite;
}
@keyframes slide-line {
  0%   { left: -100%; }
  100% { left: 100%; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center;
  padding: .75rem 1.75rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .04em;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s;
  cursor: none;
}
.btn-primary {
  background: var(--orange);
  color: #000;
}
.btn-primary:hover {
  background: var(--yellow);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,107,53,.3);
}
.btn-ghost {
  border: 1.5px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--orange);
  color: var(--orange);
  transform: translateY(-2px);
}
.btn-large { padding: 1rem 2.5rem; font-size: 1rem; }

/* ── Accent ── */
.accent {
  background: linear-gradient(90deg, var(--orange), var(--yellow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Section label ── */
.section-label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 2rem;
}
.section-title {
  font-family: var(--font-sans);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  margin-bottom: 2.5rem;
}

/* ── About ── */
.about { position: relative; }
.about::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 1px; height: 100%;
  background: linear-gradient(to bottom, transparent, var(--border), transparent);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.about-text p {
  color: #aaa;
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}
.about-text .section-title { margin-bottom: 2rem; }

.skills-group { margin-bottom: 2rem; }
.skills-group h4 {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  display: inline-block;
  padding: .35rem .85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 500;
  transition: border-color .2s, color .2s;
}
.tag:hover { border-color: var(--orange); color: var(--orange); }
.tag-outline {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}
.tag-outline:hover { border-color: var(--border); color: var(--text); }

/* ── Inline link ── */
.inline-link {
  color: var(--orange);
  border-bottom: 1px solid rgba(255,107,53,.3);
  transition: border-color .2s;
}
.inline-link:hover { border-color: var(--orange); }

/* ── Education strip ── */
.edu-strip {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 4rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.edu-item {
  flex: 1;
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  transition: background .2s;
}
.edu-item:hover { background: #1e1e1e; }
.edu-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}
.edu-year {
  display: block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: .5rem;
}
.edu-info { display: flex; flex-direction: column; gap: .25rem; }
.edu-info strong { font-size: .95rem; font-weight: 600; }
.edu-info span { font-size: .82rem; color: var(--muted); }

@media (max-width: 768px) {
  .edu-strip { flex-direction: column; }
  .edu-divider { width: 100%; height: 1px; }
}

/* ── Portfolio ── */
.portfolio { background: var(--surface); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 3rem;
}
.project-card {
  background: var(--bg);
  transition: background .3s;
}
.project-card:hover { background: #111; }
.project-card-inner {
  padding: 2.5rem;
  height: 100%;
  display: flex; flex-direction: column;
  border-right: 1.5px solid var(--border);
  border-bottom: 1.5px solid var(--border);
  position: relative;
  overflow: hidden;
}
.project-card-inner::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,107,53,.04), transparent);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.project-card:hover .project-card-inner::before { opacity: 1; }

.project-number {
  font-family: var(--font-sans);
  font-size: 4rem;
  font-weight: 700;
  color: var(--border);
  line-height: 1;
  margin-bottom: 1.5rem;
  transition: color .3s;
}
.project-card:hover .project-number { color: var(--orange); }

.project-content { flex: 1; display: flex; flex-direction: column; }
.project-tags {
  display: flex; gap: .5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.project-tags span {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
.project-title {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: .75rem;
}
.project-desc {
  color: #888;
  font-size: .95rem;
  flex: 1;
  margin-bottom: 1.5rem;
}
.project-link {
  font-size: .875rem;
  font-weight: 600;
  color: var(--orange);
  display: inline-flex; align-items: center; gap: .4rem;
  transition: gap .2s;
}
.project-link:hover .arrow { transform: translateX(4px); }
.arrow { transition: transform .2s; display: inline-block; }
.project-link.muted { color: var(--muted); }

/* ── Contact ── */
.contact { text-align: center; position: relative; overflow: hidden; }
.contact::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,107,53,.12) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.contact-inner { position: relative; z-index: 1; }
.contact-sub {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 400px;
  margin: 0 auto 2.5rem;
}
.contact-btns {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 0;
}

.social-links {
  display: flex; justify-content: center; gap: 2rem;
  margin-top: 2.5rem;
}
.social-link {
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color .2s, border-color .2s;
}
.social-link:hover { color: var(--orange); border-color: var(--orange); }

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 0;
}
.footer .container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.footer span { font-size: .82rem; color: var(--muted); }
.footer-storage {
  font-size: .75rem;
  color: var(--muted);
  opacity: 0;
  transition: opacity .6s ease;
}
.footer-storage.visible { opacity: 1; }

/* ── Drawing layer ── */
#draw-canvas {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 50;
}
body.draw-mode,
body.draw-mode * { cursor: crosshair !important; }
body.draw-erase-mode,
body.draw-erase-mode * { cursor: cell !important; }
body.draw-mode .cursor,
body.draw-mode .cursor-follower { display: none; }

/* Draw UI */
.draw-ui {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: .65rem;
}

.draw-toggle {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--surface);
  border: 1.5px solid var(--border);
  color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .2s, color .2s, box-shadow .2s, background .2s;
  flex-shrink: 0;
}
.draw-toggle:hover { border-color: var(--orange); color: var(--orange); }
.draw-toggle.active {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255,107,53,.1);
  box-shadow: 0 0 0 5px rgba(255,107,53,.12);
}

.draw-tools {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: .75rem .6rem;
}
.draw-tools.visible { display: flex; }


.draw-sizes {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
}
.draw-size {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: transparent;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s;
}
.draw-size:hover, .draw-size.active { border-color: var(--orange); }
.draw-size-dot {
  border-radius: 50%;
  background: var(--text);
  display: block;
  transition: background .15s;
}
.draw-size.active .draw-size-dot,
.draw-size:hover .draw-size-dot { background: var(--orange); }

.draw-tool-btn {
  width: 28px; height: 28px;
  border-radius: 5px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s, color .15s, background .15s;
}
.draw-tool-btn:hover { border-color: var(--orange); color: var(--orange); }
.draw-tool-btn.active { border-color: var(--yellow); color: var(--yellow); background: rgba(255,209,102,.08); }
.draw-tool-btn.draw-tool-danger:hover { border-color: #ff4455; color: #ff4455; }

/* Draw mode hint */
.draw-hint {
  position: fixed;
  top: 5rem; left: 50%;
  transform: translateX(-50%);
  background: rgba(13,13,13,.85);
  border: 1px solid rgba(255,107,53,.35);
  color: var(--orange);
  padding: .4rem 1.1rem;
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .06em;
  pointer-events: none;
  z-index: 300;
  white-space: nowrap;
  opacity: 0;
  transition: opacity .3s;
  backdrop-filter: blur(8px);
}
.draw-hint.visible { opacity: 1; }

/* ── 3D tilt na kartách ── */
.project-card-inner {
  will-change: transform;
}

/* ── Easter egg toast ── */
.easter-egg-toast {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  background: var(--surface);
  border: 1.5px solid var(--orange);
  color: var(--text);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  font-size: .9rem;
  line-height: 1.5;
  z-index: 500;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .35s, transform .35s;
  pointer-events: none;
  max-width: 280px;
}
.easter-egg-toast.visible {
  opacity: 1;
  transform: translateY(0);
}
.easter-egg-toast small {
  display: block;
  margin-top: .3rem;
  color: var(--muted);
  font-size: .78rem;
}

/* ── Reveal animation ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav { padding: 1.2rem 1.5rem; }
  .nav-links { gap: 1.5rem; }
  .hero { padding: 0 1.5rem; }
  .container { padding: 0 1.5rem; }
  .section { padding: 80px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer .container { flex-direction: column; align-items: flex-start; }

  /* ── Mobile accordion ── */
  .projects-grid {
    grid-template-columns: 1fr;
    border-radius: 6px;
  }
  .project-card-inner {
    cursor: pointer;
    padding: 1.25rem 1.5rem;
    border-right: none;
  }
  .project-number { display: none; }

  /* Collapsed header row */
  .project-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.15rem;
    margin-bottom: 0;
  }
  .project-title::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--orange);
    line-height: 1;
    flex-shrink: 0;
    margin-left: 1rem;
    transition: transform .3s ease;
  }
  .project-card.open .project-title::after {
    transform: rotate(45deg);
  }

  /* Collapsible body */
  .project-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height .38s ease, padding .38s ease;
  }
  .project-card.open .project-body {
    max-height: 500px;
    padding-top: 1rem;
  }
}