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

:root {
  --bg:          #0d0d0d;
  --surface:     rgba(26, 20, 21, 0.85);
  --border:      rgba(183, 110, 121, 0.22);
  --accent:      #b76e79;
  --accent-dim:  rgba(183, 110, 121, 0.38);
  --gray:        #3a3a3a;
  --text:        #d4b8bc;
  --text-muted:  rgba(183, 150, 155, 0.5);
  --glow:        0 0 18px rgba(183, 110, 121, 0.38);
  --radius:      10px;
  --font-mono:   'Share Tech Mono', monospace;
  --font-display:'Syne', sans-serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  overflow-x: hidden;
}

/* ── Canvas ── */
#spaceCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── Folder wrapper (top-left) ── */
.folder-wrapper {
  position: fixed;
  top: 28px;
  left: 32px;
  z-index: 100;
}

/* Folder button */
.folder-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 18px 10px 14px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.folder-btn:hover,
.folder-btn[aria-expanded="true"] {
  border-color: var(--accent);
  box-shadow: var(--glow);
  background: rgba(183, 110, 121, 0.08);
}

.folder-icon {
  width: 26px;
  height: 26px;
  transition: transform 0.3s cubic-bezier(.34,1.56,.64,1);
  flex-shrink: 0;
}
.folder-btn[aria-expanded="true"] .folder-icon {
  transform: translateY(-2px) scale(1.1);
  filter: drop-shadow(0 0 6px var(--accent));
}

.folder-label {
  user-select: none;
}

/* ── Dropdown ── */
.folder-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 260px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  /* closed state */
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition:
    max-height 0.38s cubic-bezier(.4,0,.2,1),
    opacity    0.28s ease,
    transform  0.28s cubic-bezier(.4,0,.2,1);
}
.folder-dropdown.open {
  max-height: 420px;
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
  box-shadow: var(--glow), 0 8px 40px rgba(0,0,0,0.6);
}

.dropdown-inner {
  padding: 16px 0 12px;
}

.dropdown-header {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 0 18px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

/* Project list */
.project-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.project-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  transition: background 0.18s, color 0.18s, padding-left 0.18s;
  position: relative;
}
.project-list li a::before {
  content: '→';
  color: var(--accent-dim);
  font-size: 0.75rem;
  transition: color 0.18s, transform 0.18s;
}
.project-list li a:hover {
  background: rgba(183, 110, 121, 0.07);
  color: var(--accent);
  padding-left: 22px;
}
.project-list li a:hover::before {
  color: var(--accent);
  transform: translateX(3px);
}

.project-tag {
  margin-left: auto;
  font-size: 0.65rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ── Back button (top-right) ── */
.back-btn {
  position: fixed;
  top: 28px;
  right: 32px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: color 0.22s, border-color 0.22s, box-shadow 0.22s;
}
.back-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.22s;
}
.back-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--glow);
}
.back-btn:hover svg {
  transform: translateX(-3px);
}

/* ── Hero ── */
.hero {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 0 24px;
  gap: 14px;
  animation: heroIn 0.9s ease both;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.14em;
  opacity: 0.7;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
  text-shadow: 0 0 60px rgba(183, 110, 121, 0.25);
}

.hero-sub {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 6px;
}
.hero-sub strong {
  color: var(--accent);
  font-weight: 400;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ── Responsive ── */
@media (max-width: 480px) {
  .folder-wrapper { top: 18px; left: 16px; }
  .back-btn       { top: 18px; right: 16px; }
}