/* =========================================================
   FAIT — 3D Galaxy Portfolio
   styles.css
   ========================================================= */

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

:root {
  /* Palette */
  --bg:              #020814;
  --panel-bg:        rgba(5, 9, 22, 0.93);
  --panel-border:    rgba(0, 229, 255, 0.10);
  --text-primary:    #ddeef5;
  --text-secondary:  rgba(170, 205, 220, 0.62);
  --accent-cyan:     #00e5ff;
  --accent-magenta:  #e040fb;
  --accent-amber:    #ffab40;

  /* Layout */
  --panel-w:         380px;
  --font:            -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui,
                     'Helvetica Neue', Arial, sans-serif;
}

/* ── Reset & base ─────────────────────────────────────────────────────── */

html, body {
  width:    100%;
  height:   100%;
  overflow: hidden;
  background: var(--bg);
  color:    var(--text-primary);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Scene container ──────────────────────────────────────────────────── */

#scene-container {
  position: fixed;
  inset:    0;
  z-index:  0;
}

#scene-container canvas {
  display: block;
  width:   100% !important;
  height:  100% !important;
}

/* Pointer cursor when hovering a clickable star */
#scene-container.hovering-star {
  cursor: pointer;
}

/* ── Site header ──────────────────────────────────────────────────────── */

#site-header {
  position:       fixed;
  top:            0;
  left:           0;
  right:          var(--panel-w);
  z-index:        10;
  padding:        22px 28px 0;
  pointer-events: none;           /* click-through to canvas */
}

.brand {
  font-size:   2.15rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color:       #ffffff;
  line-height: 1;
  text-shadow:
    0 0 24px rgba(0, 229, 255, 0.55),
    0 0 60px rgba(0, 229, 255, 0.20);
}

.subtitle {
  margin-top:     7px;
  font-size:      0.735rem;
  font-weight:    400;
  letter-spacing: 0.04em;
  color:          var(--text-secondary);
  max-width:      300px;
  line-height:    1.4;
}

/* ── Sound toggle ─────────────────────────────────────────────────────── */

#sound-toggle {
  position:      fixed;
  top:           20px;
  right:         calc(var(--panel-w) + 14px);
  z-index:       20;
  background:    rgba(0, 229, 255, 0.06);
  border:        1px solid rgba(0, 229, 255, 0.18);
  border-radius: 8px;
  color:         var(--text-secondary);
  cursor:        pointer;
  padding:       8px 9px;
  display:       flex;
  align-items:   center;
  justify-content: center;
  line-height:   0;
  transition:    background 0.2s, color 0.2s, border-color 0.2s;
}

#sound-toggle:hover {
  background:    rgba(0, 229, 255, 0.12);
  border-color:  rgba(0, 229, 255, 0.38);
  color:         var(--accent-cyan);
}

#sound-toggle:focus-visible {
  outline:       2px solid var(--accent-cyan);
  outline-offset: 2px;
}

#sound-toggle[aria-pressed="true"] {
  color:         var(--accent-cyan);
  background:    rgba(0, 229, 255, 0.10);
  border-color:  rgba(0, 229, 255, 0.32);
}

/* Icon state switching */
#sound-toggle .icon-sound              { display: none; }
#sound-toggle[aria-pressed="true"]  .icon-muted { display: none; }
#sound-toggle[aria-pressed="true"]  .icon-sound { display: flex; }

/* ── Project panel ────────────────────────────────────────────────────── */

#project-panel {
  position:   fixed;
  top:        0;
  right:      0;
  width:      var(--panel-w);
  height:     100%;
  z-index:    5;
  background: var(--panel-bg);
  border-left: 1px solid var(--panel-border);
  backdrop-filter:         blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display:        flex;
  flex-direction: column;
  overflow:       hidden;
}

/* ── Panel scrollable body ────────────────────────────────────────────── */

.panel-content {
  flex:       1;
  overflow-y: auto;
  padding:    34px 28px 16px;

  /* Custom scrollbar */
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 229, 255, 0.18) transparent;
}

.panel-content::-webkit-scrollbar       { width: 3px; }
.panel-content::-webkit-scrollbar-track { background: transparent; }
.panel-content::-webkit-scrollbar-thumb {
  background:    rgba(0, 229, 255, 0.20);
  border-radius: 2px;
}

/* Fade transition helper (applied via JS) */
.panel-content {
  transition: opacity 0.28s ease, transform 0.28s ease;
}

/* ── Panel header ─────────────────────────────────────────────────────── */

.panel-header {
  margin-bottom: 26px;
}

.project-index-label {
  font-size:      0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color:          var(--text-secondary);
  margin-bottom:  8px;
  opacity:        0.7;
}

.project-name {
  font-size:      1.45rem;
  font-weight:    600;
  letter-spacing: 0.015em;
  color:          var(--text-primary);
  line-height:    1.2;
}

/* ── Project screenshot + link ────────────────────────────────────────── */

.project-screenshot-link {
  display:       block;
  position:      relative;
  margin-bottom: 22px;
  border-radius: 8px;
  overflow:      hidden;
  border:        1px solid rgba(255, 255, 255, 0.08);
  text-decoration: none;
  flex-shrink:   0;
}

.project-screenshot {
  display:    block;
  width:      100%;
  height:     175px;
  object-fit: cover;
  object-position: top center;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.35s ease;
}

.screenshot-overlay {
  position:   absolute;
  inset:      0;
  display:    flex;
  align-items: center;
  justify-content: center;
  font-size:  0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color:      #fff;
  background: rgba(2, 8, 20, 0.55);
  opacity:    0;
  transition: opacity 0.25s ease;
}

.project-screenshot-link:hover .screenshot-overlay { opacity: 1; }
.project-screenshot-link:hover .project-screenshot  { transform: scale(1.03); }

.project-screenshot-link:focus-visible {
  outline:        2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* ── Case-study sections ──────────────────────────────────────────────── */

.case-study {
  display:        flex;
  flex-direction: column;
}

.case-section {
  padding:     15px 0 16px;
  border-top:  1px solid rgba(255, 255, 255, 0.055);
}

.case-section:first-child {
  border-top: none;
  padding-top: 0;
}

.case-section h3 {
  font-size:      0.61rem;
  font-weight:    600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color:          var(--accent-cyan);
  margin-bottom:  8px;
}

.case-section p {
  font-size:   0.875rem;
  line-height: 1.68;
  color:       var(--text-secondary);
  font-weight: 400;
}

.stack-list {
  font-size:      0.82rem !important;
  letter-spacing: 0.01em;
  color:          rgba(160, 200, 215, 0.50) !important;
}

/* ── Project navigation ───────────────────────────────────────────────── */

.project-nav {
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  padding:         14px 28px;
  border-top:      1px solid var(--panel-border);
  flex-shrink:     0;
}

.nav-btn {
  background:    rgba(255, 255, 255, 0.04);
  border:        1px solid rgba(255, 255, 255, 0.09);
  border-radius: 9px;
  color:         var(--text-secondary);
  cursor:        pointer;
  font-size:     1.6rem;
  line-height:   1;
  width:         44px;
  height:        44px;
  display:       flex;
  align-items:   center;
  justify-content: center;
  transition:    background 0.18s, color 0.18s, border-color 0.18s, transform 0.12s;
  user-select:   none;
}

.nav-btn:hover {
  background:   rgba(0, 229, 255, 0.07);
  border-color: rgba(0, 229, 255, 0.28);
  color:        var(--accent-cyan);
  transform:    scale(1.06);
}

.nav-btn:active {
  transform: scale(0.93);
}

.nav-btn:focus-visible {
  outline:        2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.project-counter {
  font-size:      0.75rem;
  letter-spacing: 0.08em;
  color:          var(--text-secondary);
  opacity:        0.65;
}

/* ── Responsive — mobile ──────────────────────────────────────────────── */

@media (max-width: 768px) {
  :root {
    --panel-w: 0px;   /* header stretches full width */
  }

  #site-header {
    right:      0;
    padding:    14px 16px 0;
    background: rgba(2, 8, 20, 0.72);
    backdrop-filter:         blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .brand {
    font-size: 1.65rem;
  }

  .subtitle {
    display: none;
  }

  #sound-toggle {
    top:   12px;
    right: 12px;
  }

  #project-panel {
    top:           auto;
    right:         0;
    bottom:        0;
    left:          0;
    width:         100%;
    height:        50vh;
    border-left:   none;
    border-top:    1px solid var(--panel-border);
    border-radius: 14px 14px 0 0;
  }

  .panel-content {
    padding: 18px 18px 10px;
  }

  .project-name {
    font-size: 1.2rem;
  }

  .case-section p {
    font-size: 0.83rem;
  }

  .project-nav {
    padding: 10px 18px;
  }
}

/* ── Reduced-motion overrides ─────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .panel-content,
  .nav-btn,
  #sound-toggle {
    transition: none !important;
  }
}