/* ============================================================
   EMILIA — PREMIUM ICE THEME  |  core.css
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Raleway:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ── */
:root {
  --ice-0:   #f0f8ff;
  --ice-1:   #c8e8ff;
  --ice-2:   #8fd3ff;
  --ice-3:   #4db8ff;
  --ice-4:   #1f8fff;
  --ice-5:   #0066cc;
  --deep:    #020c1b;
  --deep-2:  #051428;
  --deep-3:  #071e35;
  --glass:   rgba(143,211,255,0.06);
  --glass-2: rgba(143,211,255,0.12);
  --glass-3: rgba(143,211,255,0.18);
  --border:  rgba(143,211,255,0.18);
  --border-2:rgba(143,211,255,0.35);
  --glow:    rgba(79,195,255,0.55);
  --text:    #e8f4ff;
  --muted:   rgba(200,232,255,0.6);
  --shadow:  0 24px 80px rgba(0,10,30,0.8);
  --r-sm:    10px;
  --r-md:    18px;
  --r-lg:    28px;
  --font-display: 'Cinzel', serif;
  --font-body:    'Raleway', sans-serif;
  --transition:   all 0.35s cubic-bezier(.25,.46,.45,.94);
}

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

body {
  font-family: var(--font-body);
  background: var(--deep);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: none; /* custom cursor */
}

/* ── Background Layers ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -3;
  /* deep base */
  background: #010913;
}

/* aurora layer */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    /* top-left aurora bloom */
    radial-gradient(ellipse 70% 55% at 15% 8%,  rgba(20, 100, 220, 0.28) 0%, transparent 65%),
    /* top-right cold mist */
    radial-gradient(ellipse 55% 45% at 88% 5%,  rgba(80, 180, 255, 0.14) 0%, transparent 60%),
    /* centre deep glow */
    radial-gradient(ellipse 90% 60% at 50% 40%,  rgba(10,  55, 160, 0.18) 0%, transparent 70%),
    /* bottom aurora */
    radial-gradient(ellipse 80% 45% at 30% 100%, rgba(30, 120, 240, 0.22) 0%, transparent 60%),
    /* bottom-right accent */
    radial-gradient(ellipse 50% 40% at 90% 95%,  rgba(60, 150, 255, 0.12) 0%, transparent 55%);
  animation: auroraDrift 18s ease-in-out infinite alternate;
}

@keyframes auroraDrift {
  0%   { opacity: 1;    filter: hue-rotate(0deg); }
  50%  { opacity: 0.82; filter: hue-rotate(12deg); }
  100% { opacity: 1;    filter: hue-rotate(-8deg); }
}

/* subtle perspective grid */
body .bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(79, 180, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 180, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 85% 80% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 80% at 50% 50%, black 30%, transparent 100%);
}

/* time-based overlay tints */
body.day::before  { background: #010c1e; }
body.night::before{ background: #010913; }

/* ── Snow Canvas ── */
#fxCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Custom Cursor ── */
#cursor-dot, #cursor-ring {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%,-50%);
  transition: opacity 0.3s;
}
#cursor-dot {
  width: 6px;
  height: 6px;
  background: var(--ice-2);
  box-shadow: 0 0 10px var(--ice-3), 0 0 25px var(--ice-4);
  transition: width 0.15s, height 0.15s, background 0.15s;
}
#cursor-ring {
  width: 30px;
  height: 30px;
  border: 1.5px solid rgba(143,211,255,0.55);
  backdrop-filter: none;
  transition: width 0.25s cubic-bezier(.25,.46,.45,.94),
              height 0.25s cubic-bezier(.25,.46,.45,.94),
              border-color 0.25s,
              transform 0.08s linear;
}
body:has(a:hover) #cursor-ring,
body:has(button:hover) #cursor-ring { width: 50px; height: 50px; border-color: var(--ice-3); }

/* ── Loading Screen ── */
#loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--deep);
  gap: 20px;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
#loader .loader-logo {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: 0.25em;
  background: linear-gradient(135deg, var(--ice-1), var(--ice-3), var(--ice-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200%;
  animation: shimmer 2s linear infinite;
}
#loader .loader-bar-wrap {
  width: 200px;
  height: 2px;
  background: rgba(143,211,255,0.15);
  border-radius: 99px;
  overflow: hidden;
}
#loader .loader-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ice-3), var(--ice-4));
  border-radius: 99px;
  animation: loadBar 1.8s ease forwards;
  box-shadow: 0 0 12px var(--glow);
}
#loader .loader-flakes { font-size: 1.4rem; opacity: 0.6; letter-spacing: 0.5em; animation: pulse 1.5s ease infinite; }

/* ── Container ── */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 5;
}

/* ── Navigation Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(2,12,27,0.55);
  backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(2,12,27,0.82);
  border-bottom-color: var(--border-2);
}

.logo-wrap { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-wrap img {
  width: 44px; height: 44px;
  border-radius: 12px;
  object-fit: cover;
  border: 1.5px solid var(--border-2);
  box-shadow: 0 0 18px rgba(79,180,255,0.3);
}
.logo-wrap .logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  background: linear-gradient(135deg, var(--ice-1), var(--ice-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-nav { display: flex; align-items: center; gap: 8px; }
.site-nav a {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: var(--transition);
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--ice-2);
  border-color: var(--border);
  background: var(--glass-2);
  text-shadow: 0 0 12px var(--glow);
}
.site-nav a.active { border-color: var(--border-2); }

/* nav right controls */
.nav-controls { display: flex; align-items: center; gap: 10px; }
.nav-btn {
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--ice-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}
.nav-btn:hover { background: var(--glass-3); border-color: var(--border-2); box-shadow: 0 0 14px rgba(79,180,255,0.25); }

/* ── Glass Card ── */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  backdrop-filter: blur(14px) saturate(1.2);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.glass-card:hover {
  border-color: var(--border-2);
  box-shadow: 0 28px 90px rgba(0,10,30,0.9), 0 0 30px rgba(79,180,255,0.12);
  transform: translateY(-4px);
}

/* ── Text Utilities ── */
.gradient-text {
  background: linear-gradient(135deg, var(--ice-0) 0%, var(--ice-2) 50%, var(--ice-4) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200%;
  animation: shimmer 4s linear infinite;
}

/* ── Footer ── */
.site-footer {
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 5;
  margin-top: 80px;
}
.site-footer .footer-brand {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.25em;
  display: block;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--ice-1), var(--ice-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Emilia Mascot ── */
.emilia-sprite {
  position: fixed;
  /* initial position set by JS — no bottom/right here */
  width: 130px;
  height: 130px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 500;
  cursor: grab;
  user-select: none;
  touch-action: none;
  filter: drop-shadow(0 0 16px rgba(79,180,255,0.4));
  transition: filter 0.3s;
}
.emilia-sprite:hover { filter: drop-shadow(0 0 22px rgba(79,180,255,0.7)); }
.emilia-sprite.idle    { background-image: url('../assets/images/emilia/idle_emilia.png');    animation: spriteAnim 1s   steps(6) infinite; }
.emilia-sprite.welcome { background-image: url('../assets/images/emilia/welcome_emilia.png'); animation: spriteAnim 1s   steps(6) 1; }
.emilia-sprite.walk    { background-image: url('../assets/images/emilia/walk_emilia.png');    animation: spriteAnim 0.9s steps(8) infinite; }
.emilia-sprite.sleep   { background-image: url('../assets/images/emilia/sleep_emilia.png');   animation: spriteAnim 1s   steps(4) infinite; }
.emilia-sprite.eat     { background-image: url('../assets/images/emilia/eat_emilia.png');     animation: spriteAnim 1s   steps(6) 1; }
.emilia-sprite.angry   { background-image: url('../assets/images/emilia/angry_emilia.png');   animation: spriteAnim 1s   steps(6) 1; }
.emilia-sprite.run     { background-image: url('../assets/images/emilia/speed_emilia.png');   animation: spriteAnim 0.8s steps(8) infinite; }
.emilia-sprite.laugh   { background-image: url('../assets/images/emilia/happy_emilia.png');   animation: spriteAnim 1s   steps(6) 1; }

@keyframes spriteAnim { to { background-position: 100% 0; } }

/* ── Music Toggle ── */
#music-toggle {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 400;
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(2,12,27,0.7);
  backdrop-filter: blur(10px);
  color: var(--ice-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
#music-toggle:hover { background: var(--glass-3); border-color: var(--border-2); box-shadow: 0 0 18px rgba(79,180,255,0.3); }
#music-toggle .music-waves { display: flex; gap: 2px; align-items: flex-end; height: 16px; }
#music-toggle .wave-bar {
  width: 3px; border-radius: 2px; background: var(--ice-2);
  animation: waveAnim 0.8s ease infinite;
}
#music-toggle .wave-bar:nth-child(2) { animation-delay: 0.15s; }
#music-toggle .wave-bar:nth-child(3) { animation-delay: 0.3s; }
#music-toggle.muted .wave-bar { animation: none; height: 4px !important; opacity: 0.4; }
@keyframes waveAnim {
  0%,100% { height: 4px; }
  50%      { height: 14px; }
}

/* ── Touch Snow ── */
.touch-snow {
  position: fixed;
  width: 7px; height: 7px;
  background: rgba(200,232,255,0.9);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9000;
  animation: touchSnowFall 0.8s ease forwards;
}
@keyframes touchSnowFall {
  0%   { transform: translate(-50%,-50%) scale(1); opacity: 1; }
  100% { transform: translate(-50%, 20px) scale(0); opacity: 0; }
}

/* ── Scroll Reveal ── */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ── Keyframes ── */
@keyframes shimmer { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
@keyframes pulse { 0%,100% { opacity: 0.5; } 50% { opacity: 1; } }
@keyframes loadBar { 0% { width:0%; } 100% { width:100%; } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes rotateGlow { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* ── Selection ── */
::selection { background: rgba(79,180,255,0.3); color: var(--ice-0); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--deep-2); }
::-webkit-scrollbar-thumb { background: var(--ice-5); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--ice-4); }

/* ── Protect ── */
img { -webkit-user-drag: none; user-select: none; pointer-events: none; }
* { -webkit-user-select: none; user-select: none; }
input, textarea { user-select: text; -webkit-user-select: text; }

/* ══════════════════════════════════════════════
   HAMBURGER BUTTON  (mobile only)
══════════════════════════════════════════════ */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--glass);
  cursor: pointer;
  z-index: 210;
  flex-shrink: 0;
  transition: var(--transition);
}
.hamburger:hover { background: var(--glass-2); border-color: var(--border-2); }
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ice-2);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════════════
   MOBILE DRAWER
══════════════════════════════════════════════ */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  z-index: 190;
  background: rgba(2,10,24,0.97);
  backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--border-2);
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  transition: max-height 0.38s cubic-bezier(.25,.46,.45,.94), padding 0.38s cubic-bezier(.25,.46,.45,.94);
}
.mobile-drawer.open {
  max-height: 320px;
  padding: 16px 20px 24px;
}
.mobile-drawer a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 12px;
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: var(--transition);
  margin-bottom: 6px;
}
.mobile-drawer a:last-child { margin-bottom: 0; }
.mobile-drawer a:hover,
.mobile-drawer a.active {
  color: var(--ice-1);
  background: var(--glass-2);
  border-color: var(--border);
}
.mobile-drawer a.active {
  color: var(--ice-2);
  border-color: var(--border-2);
  text-shadow: 0 0 14px var(--glow);
}
.mobile-drawer a::before {
  content: attr(data-icon);
  font-size: 1.1rem;
  width: 28px;
  text-align: center;
}

/* dim overlay behind drawer */
.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 180;
  background: rgba(0,5,18,0.55);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.drawer-overlay.open { opacity: 1; }

/* ══════════════════════════════════════════════
   MOBILE BREAKPOINT
══════════════════════════════════════════════ */
@media (max-width: 768px) {
  .site-nav      { display: none; }
  .hamburger     { display: flex; }
  .mobile-drawer { display: block; }
  .drawer-overlay{ display: block; }
  .site-header   { padding: 12px 18px; }
  .emilia-sprite { width: 100px; height: 100px; }
}