/* ─────────────────────────────────────────
   CELESTIA — Constellation Mood Board
   Dreamy · Ethereal · Prism Glass
───────────────────────────────────────── */

:root {
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shine: rgba(255, 255, 255, 0.35);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.5);
  --accent-lavender: #c9b8ff;
  --accent-rose: #ffb8d9;
  --accent-sky: #b8e8ff;
  --star-glow: rgba(220, 200, 255, 0.9);
  --line-color: rgba(200, 180, 255, 0.4);
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #04010f;
  font-family: 'Cormorant Garamond', Georgia, serif;
  cursor: crosshair;
  user-select: none;
}

/* ── PRISM CANVAS BACKGROUND ── */
#prismCanvas {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  opacity: 0.85;
}

/* ── PARTICLES ── */
#particles {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: white;
  opacity: 0;
  animation: floatParticle var(--dur, 8s) ease-in-out var(--delay, 0s) infinite;
}

@keyframes floatParticle {
  0%   { opacity: 0; transform: translateY(0) scale(1); }
  20%  { opacity: var(--max-op, 0.6); }
  80%  { opacity: var(--max-op, 0.6); }
  100% { opacity: 0; transform: translateY(-120px) scale(0.3); }
}

/* ── HEADER ── */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  text-align: center;
  padding: 28px 20px 16px;
  background: linear-gradient(to bottom, rgba(4,1,15,0.7) 0%, transparent 100%);
  pointer-events: none;
}

.title {
  font-family: 'Cinzel', serif;
  font-weight: 300;
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  letter-spacing: 0.25em;
  color: var(--text-primary);
  text-shadow: 0 0 40px rgba(180, 150, 255, 0.6), 0 0 80px rgba(180, 150, 255, 0.2);
  animation: titleGlow 4s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  from { text-shadow: 0 0 30px rgba(180,150,255,0.5), 0 0 60px rgba(180,150,255,0.15); }
  to   { text-shadow: 0 0 50px rgba(200,170,255,0.8), 0 0 100px rgba(200,170,255,0.3); }
}

.subtitle {
  font-size: clamp(0.75rem, 1.5vw, 0.95rem);
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  margin-top: 6px;
  font-style: italic;
  font-weight: 300;
}

/* ── GLASS BUTTON ── */
.glass-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--glass-border);
  border-radius: 40px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  color: var(--text-primary);
  font-family: 'Cinzel', serif;
  font-size: 0.72rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  box-shadow:
    0 4px 24px var(--glass-shadow),
    inset 0 1px 0 var(--glass-shine),
    0 0 0 0 rgba(200, 170, 255, 0);
  white-space: nowrap;
}

.glass-btn:hover {
  background: rgba(255,255,255,0.13);
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-2px);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.5),
    0 0 20px rgba(200,170,255,0.2);
}

.glass-btn.active {
  background: rgba(180,150,255,0.18);
  border-color: rgba(200,170,255,0.5);
  box-shadow:
    0 4px 24px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.5),
    0 0 20px rgba(180,150,255,0.35),
    0 0 40px rgba(180,150,255,0.1);
}

.glass-btn.active .btn-icon {
  color: var(--accent-lavender);
  text-shadow: 0 0 12px rgba(180,150,255,0.8);
}

.glass-btn.small {
  padding: 8px 16px;
  font-size: 0.68rem;
}

.glass-btn.secondary {
  background: rgba(255,255,255,0.04);
}

.btn-icon {
  font-size: 1rem;
  line-height: 1;
  transition: all 0.3s ease;
}

.btn-label {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

/* Glass shine sweep on hover */
.shine {
  position: absolute;
  top: -50%;
  left: -75%;
  width: 50%;
  height: 200%;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255,255,255,0.25) 50%,
    transparent 60%
  );
  transform: skewX(-15deg);
  transition: none;
  pointer-events: none;
}

.glass-btn:hover .shine {
  animation: shineSweep 0.6s ease forwards;
}

@keyframes shineSweep {
  0%   { left: -75%; }
  100% { left: 125%; }
}

/* ── TOOLBAR ── */
.toolbar {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--glass-border);
  border-radius: 60px;
  background: rgba(10, 5, 30, 0.55);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  box-shadow:
    0 8px 48px rgba(0,0,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.12),
    inset 0 -1px 0 rgba(0,0,0,0.3);
  animation: toolbarAppear 1s cubic-bezier(0.23,1,0.32,1) 0.5s both;
}

@keyframes toolbarAppear {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.divider {
  width: 1px;
  height: 28px;
  background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.2), transparent);
  margin: 0 4px;
}

/* ── COLOR PALETTE ── */
.color-palette {
  position: fixed;
  left: 28px;
  bottom: 36px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  background: rgba(10, 5, 30, 0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
  animation: toolbarAppear 1s cubic-bezier(0.23,1,0.32,1) 0.7s both;
}

.palette-label {
  font-family: 'Cinzel', serif;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  text-align: center;
  text-transform: uppercase;
}

.color-swatches {
  display: flex;
  flex-direction: column;
  gap: 7px;
  align-items: center;
}

.swatch {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.2);
  background: var(--c);
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 0 8px rgba(0,0,0,0.3);
  position: relative;
  overflow: visible;
}

.swatch::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1.5px solid transparent;
  transition: border-color 0.25s ease;
}

.swatch:hover { transform: scale(1.2); }
.swatch.active::after { border-color: rgba(255,255,255,0.6); }

/* ── SVG CONSTELLATION LAYER ── */
#constellationSVG {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 3;
  pointer-events: none;
}

/* ── STAR FIELD (HTML stars) ── */
#starField {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.star-node {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
  pointer-events: all;
  transition: transform 0.2s ease;
}

.star-node::before {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
}

.star-core {
  border-radius: 50%;
  position: relative;
  z-index: 2;
  animation: starPulse var(--pulse-dur, 3s) ease-in-out infinite alternate;
}

@keyframes starPulse {
  from { box-shadow: 0 0 6px 2px var(--star-color), 0 0 20px 4px var(--star-glow-color); transform: scale(1); }
  to   { box-shadow: 0 0 12px 4px var(--star-color), 0 0 40px 10px var(--star-glow-color); transform: scale(1.15); }
}

.star-halo {
  position: absolute;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--star-color);
  opacity: 0.3;
  animation: haloExpand var(--pulse-dur, 3s) ease-in-out infinite alternate;
}

@keyframes haloExpand {
  from { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
  to   { transform: translate(-50%, -50%) scale(1.8); opacity: 0; }
}

.star-sparkle {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 0.9rem;
  pointer-events: none;
  animation: sparkleAnim 0.6s cubic-bezier(0.23,1,0.32,1) forwards;
  z-index: 10;
  text-shadow: 0 0 10px rgba(255,255,255,0.8);
}

@keyframes sparkleAnim {
  from { opacity: 1; transform: translate(-50%,-50%) scale(0.3); }
  60%  { opacity: 1; transform: translate(-50%,-50%) scale(1.4); }
  to   { opacity: 0; transform: translate(-50%,-50%) scale(0.8); }
}

.star-erase-hint {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px dashed rgba(255,100,100,0.6);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.star-node.erase-mode:hover .star-erase-hint { opacity: 1; }

/* ── CONSTELLATION LINE ── */
.constellation-line {
  stroke: var(--line-color);
  stroke-width: 1;
  stroke-linecap: round;
  filter: drop-shadow(0 0 4px rgba(180,150,255,0.5));
  opacity: 0;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  animation: drawLine 0.8s cubic-bezier(0.23,1,0.32,1) forwards;
}

@keyframes drawLine {
  to { stroke-dashoffset: 0; opacity: 1; }
}

/* ── NAMING MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4,1,15,0.6);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.modal-glass {
  position: relative;
  padding: 40px 48px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 24px;
  background: rgba(20,10,50,0.7);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  box-shadow:
    0 24px 80px rgba(0,0,0,0.6),
    inset 0 1px 0 rgba(255,255,255,0.2),
    0 0 60px rgba(150,100,255,0.1);
  overflow: hidden;
  animation: modalAppear 0.4s cubic-bezier(0.23,1,0.32,1) both;
  max-width: 440px;
  width: 90%;
  text-align: center;
}

@keyframes modalAppear {
  from { transform: scale(0.9) translateY(10px); }
  to   { transform: scale(1) translateY(0); }
}

.modal-shine {
  position: absolute;
  top: 0; left: -40%;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(200,170,255,0.8), transparent);
  border-radius: 50%;
  filter: blur(1px);
}

.modal-title {
  font-family: 'Cinzel', serif;
  font-weight: 300;
  font-size: 1.4rem;
  color: var(--text-primary);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.modal-hint {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.modal-input {
  width: 100%;
  padding: 14px 20px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 40px;
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(8px);
  color: var(--text-primary);
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  font-style: italic;
  text-align: center;
  letter-spacing: 0.05em;
  outline: none;
  transition: all 0.3s ease;
  margin-bottom: 24px;
}

.modal-input::placeholder { color: rgba(255,255,255,0.3); }
.modal-input:focus {
  border-color: rgba(180,150,255,0.5);
  box-shadow: 0 0 20px rgba(150,100,255,0.15), inset 0 1px 0 rgba(255,255,255,0.1);
}

.modal-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ── CONSTELLATION NAME DISPLAY ── */
.constellation-name {
  position: fixed;
  top: 110px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  font-family: 'Cinzel', serif;
  font-weight: 300;
  font-size: clamp(0.8rem, 2vw, 1.1rem);
  letter-spacing: 0.25em;
  color: rgba(200,180,255,0.7);
  text-shadow: 0 0 20px rgba(180,150,255,0.5);
  pointer-events: none;
  transition: all 0.5s ease;
  text-align: center;
  opacity: 0;
}

.constellation-name.visible {
  opacity: 1;
}

/* ── GALLERY ── */
.gallery-toggle {
  position: fixed;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  z-index: 10;
  padding: 14px 16px;
  background: rgba(10,5,30,0.6);
  border: 1px solid var(--glass-border);
  border-right: none;
  border-radius: 16px 0 0 16px;
  color: var(--text-secondary);
  font-family: 'Cinzel', serif;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  cursor: pointer;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all 0.3s ease;
  overflow: hidden;
}

.gallery-toggle:hover {
  color: var(--text-primary);
  background: rgba(20,10,50,0.7);
  box-shadow: -4px 0 20px rgba(0,0,0,0.3);
}

.gallery-panel {
  position: fixed;
  top: 0; right: 0;
  width: 280px; height: 100%;
  z-index: 9;
  background: rgba(8,4,22,0.8);
  border-left: 1px solid var(--glass-border);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.23,1,0.32,1);
  display: flex;
  flex-direction: column;
  padding: 80px 20px 30px;
  box-shadow: -8px 0 48px rgba(0,0,0,0.4);
}

.gallery-panel.open {
  transform: translateX(0);
}

.gallery-header {
  font-family: 'Cinzel', serif;
  font-weight: 300;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: rgba(200,180,255,0.6);
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.gallery-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.gallery-list::-webkit-scrollbar { width: 2px; }
.gallery-list::-webkit-scrollbar-thumb { background: rgba(180,150,255,0.3); border-radius: 2px; }

.gallery-empty {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.85rem;
  text-align: center;
  line-height: 1.8;
  margin-top: 30px;
}

.gallery-item {
  padding: 14px 16px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  transition: all 0.25s ease;
}

.gallery-item:hover {
  background: rgba(180,150,255,0.1);
  border-color: rgba(180,150,255,0.3);
  transform: translateX(-3px);
}

.gallery-item-name {
  font-family: 'Cinzel', serif;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.gallery-item-meta {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 110px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  z-index: 200;
  padding: 10px 24px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 40px;
  background: rgba(20,10,50,0.85);
  backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-family: 'Cinzel', serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.23,1,0.32,1);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── MODE INDICATOR ── */
.mode-indicator {
  position: fixed;
  top: 50%;
  left: 28px;
  transform: translateY(-50%);
  z-index: 8;
  font-family: 'Cinzel', serif;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: rgba(180,150,255,0.5);
  writing-mode: vertical-rl;
  text-transform: uppercase;
  pointer-events: none;
  transition: color 0.3s ease;
}

/* ── RIPPLE EFFECT ── */
.ripple {
  position: fixed;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,170,255,0.3) 0%, transparent 70%);
  pointer-events: none;
  z-index: 5;
  transform: scale(0);
  animation: rippleExpand 0.8s cubic-bezier(0.23,1,0.32,1) forwards;
}

@keyframes rippleExpand {
  to { transform: scale(1); opacity: 0; }
}

/* ── SELECTION RING (connect mode) ── */
.selection-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid var(--accent-lavender);
  transform: translate(-50%,-50%) scale(1.4);
  pointer-events: none;
  animation: ringPulse 1s ease-in-out infinite alternate;
}

@keyframes ringPulse {
  from { box-shadow: 0 0 8px rgba(180,150,255,0.5); }
  to   { box-shadow: 0 0 20px rgba(180,150,255,0.9); }
}

/* ── RESPONSIVENESS ── */
@media (max-width: 600px) {
  .color-palette { display: none; }
  .toolbar { gap: 4px; padding: 10px 12px; bottom: 20px; }
  .glass-btn { padding: 8px 12px; }
  .btn-label { display: none; }
  .gallery-panel { width: 240px; }
}