/* ================================================
   yongjoon.xyz — Styles
   Colors:
     --midnight:  #1a1a3e
     --sapphire:  #12122e
     --gold:      #d4a843  (X-axis)
     --silver:    #b8c4d0  (Y-axis)
     --rose:      #c87070  (Z-axis)
     --star:      #e8e8f0  (text)
     --gridline:  rgba(232,232,240,0.08)
   ================================================ */

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

:root {
  --midnight: #1a1a3e;
  --sapphire: #12122e;
  --gold:     #d4a843;
  --silver:   #b8c4d0;
  --rose:     #c87070;
  --star:     #e8e8f0;
  --gridline: rgba(232,232,240,0.08);

  --font-display: 'Crimson Pro', Georgia, serif;
  --font-body:    'Outfit', system-ui, sans-serif;
  --font-mono:    'Fira Code', 'Courier New', monospace;
}

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

body {
  background-color: var(--midnight);
  color: var(--star);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---- Typography helpers ---- */
.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

/* ---- Grid Overlay SVG ---- */
.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: visible;
}

/* ---- Crosshair ---- */
.crosshair {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  pointer-events: none;
  z-index: 100;
  opacity: 0.5;
  transition: top 0.1s linear;
}

.ch-h,
.ch-v {
  position: absolute;
  background: var(--star);
}

.ch-h {
  width: 20px;
  height: 1px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.ch-v {
  width: 1px;
  height: 20px;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

/* ---- Stagger animation ---- */
@keyframes stagger-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stagger-item {
  opacity: 0;
  animation: stagger-in 0.6s ease forwards;
  animation-play-state: paused;
}

.stagger-item.visible {
  animation-play-state: running;
  animation-delay: calc(var(--stagger-index, 0) * 100ms);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 1;
}

.hero-inner {
  text-align: center;
  position: relative;
  z-index: 2;
}

.hero-coords {
  color: var(--silver);
  margin-bottom: 1.5rem;
  letter-spacing: 0.1em;
  opacity: 0;
  animation: stagger-in 0.6s ease 0s forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
  opacity: 0;
  animation: stagger-in 0.6s ease 0.2s forwards;
}

.axis-x { color: var(--gold); }
.axis-y { color: var(--silver); }
.axis-z { color: var(--rose); }

.hero-sub {
  font-family: var(--font-body);
  font-size: 1.1rem;
  color: var(--silver);
  margin-bottom: 2.5rem;
  letter-spacing: 0.05em;
}

.hero-nav {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  padding: 0.5rem 1.2rem;
  border: 1px solid;
  transition: background 0.25s, color 0.25s;
}

.nav-x {
  border-color: var(--gold);
  color: var(--gold);
}

.nav-x:hover {
  background: var(--gold);
  color: var(--midnight);
}

.nav-y {
  border-color: var(--silver);
  color: var(--silver);
}

.nav-y:hover {
  background: var(--silver);
  color: var(--midnight);
}

.nav-z {
  border-color: var(--rose);
  color: var(--rose);
}

.nav-z:hover {
  background: var(--rose);
  color: var(--midnight);
}

/* ---- Dimension Sections ---- */
.dim-section {
  position: relative;
  padding: 6rem 2rem;
  z-index: 1;
  overflow: hidden;
}

.section-label {
  position: absolute;
  top: 2rem;
  right: 2rem;
  color: var(--gridline);
  font-size: 4rem;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: 0.05em;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--silver);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ---- X Section: Skills ---- */
.dim-x {
  background: var(--sapphire);
  border-top: 1px solid rgba(212,168,67,0.15);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-label {
  color: var(--star);
  font-size: 0.85rem;
}

.skill-bar {
  height: 3px;
  background: rgba(232,232,240,0.1);
  width: 100%;
}

.skill-fill {
  height: 100%;
  background: var(--gold);
  transition: width 1s ease;
}

/* ---- Y Section: Portfolio Grid ---- */
.dim-y {
  background: var(--midnight);
  border-top: 1px solid rgba(184,196,208,0.15);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--sapphire);
  padding: 2rem;
  border-bottom: 4px solid var(--card-accent, var(--gold));
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.card-featured {
  grid-column: span 2;
}

.card-wide {
  grid-column: span 2;
}

/* Abstract art areas */
.card-art {
  width: 100%;
  height: 140px;
  border-radius: 0;
  flex-shrink: 0;
}

.card-art-1 {
  background:
    radial-gradient(circle at 30% 40%, rgba(212,168,67,0.45) 0%, transparent 55%),
    radial-gradient(circle at 75% 60%, rgba(184,196,208,0.3) 0%, transparent 45%),
    linear-gradient(135deg, rgba(200,112,112,0.2) 0%, transparent 60%),
    var(--midnight);
}

.card-art-2 {
  background:
    radial-gradient(circle at 65% 30%, rgba(184,196,208,0.5) 0%, transparent 50%),
    linear-gradient(220deg, rgba(212,168,67,0.15) 0%, transparent 50%),
    radial-gradient(circle at 20% 70%, rgba(200,112,112,0.35) 0%, transparent 40%),
    var(--midnight);
}

.card-art-3 {
  background:
    linear-gradient(45deg, rgba(200,112,112,0.4) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212,168,67,0.3) 0%, transparent 45%),
    linear-gradient(200deg, rgba(184,196,208,0.25) 0%, transparent 55%),
    var(--midnight);
}

.card-art-4 {
  background:
    radial-gradient(ellipse at 50% 80%, rgba(212,168,67,0.5) 0%, transparent 60%),
    linear-gradient(90deg, rgba(200,112,112,0.2) 0%, transparent 40%),
    radial-gradient(circle at 15% 30%, rgba(184,196,208,0.35) 0%, transparent 45%),
    var(--midnight);
}

.card-art-5 {
  background:
    linear-gradient(135deg, rgba(184,196,208,0.4) 0%, transparent 45%),
    radial-gradient(circle at 70% 50%, rgba(200,112,112,0.35) 0%, transparent 50%),
    radial-gradient(circle at 25% 60%, rgba(212,168,67,0.3) 0%, transparent 45%),
    linear-gradient(300deg, rgba(184,196,208,0.15) 0%, transparent 50%),
    var(--midnight);
}

.card-art-6 {
  background:
    radial-gradient(circle at 40% 30%, rgba(200,112,112,0.5) 0%, transparent 50%),
    linear-gradient(180deg, rgba(212,168,67,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 75%, rgba(184,196,208,0.3) 0%, transparent 40%),
    var(--midnight);
}

.card-content {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card-axis {
  color: var(--card-accent, var(--gold));
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.2;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--silver);
  line-height: 1.6;
}

.card-tag {
  font-size: 0.72rem;
  color: rgba(232,232,240,0.5);
  letter-spacing: 0.06em;
}

/* ---- Z Section: Contact ---- */
.dim-z {
  background: var(--sapphire);
  border-top: 1px solid rgba(200,112,112,0.15);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.5rem;
  border-left: 2px solid var(--rose);
}

.contact-label {
  color: var(--rose);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.contact-link {
  font-size: 0.95rem;
  color: var(--star);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  word-break: break-word;
}

.contact-link:hover {
  color: var(--rose);
  border-color: var(--rose);
}

.contact-message {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-style: italic;
  color: var(--silver);
  max-width: 500px;
}

/* ---- Footer ---- */
.footer {
  position: relative;
  padding: 4rem 2rem 2rem;
  background: var(--midnight);
  border-top: 1px solid var(--gridline);
  overflow: hidden;
  z-index: 1;
}

.footer-axes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.footer-axis-x {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(184,196,208,0.12) 30%, rgba(184,196,208,0.12) 70%, transparent);
}

.footer-axis-y {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(184,196,208,0.12) 30%, rgba(184,196,208,0.12) 70%, transparent);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  margin-bottom: 1rem;
  position: relative;
  z-index: 2;
}

.footer-name {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
}

.footer-coords {
  color: var(--silver);
  font-size: 0.8rem;
}

.footer-copy {
  text-align: center;
  font-size: 0.75rem;
  color: rgba(232,232,240,0.3);
  position: relative;
  z-index: 2;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-featured,
  .card-wide {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .card-featured,
  .card-wide {
    grid-column: span 1;
  }

  .hero-nav {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .section-label {
    font-size: 2.5rem;
    top: 1rem;
    right: 1rem;
  }
}