:root {
  --aqua: #00B4D8;
  --deep: #0077B6;
  --abyss: #023E8A;
  --sun: #FFD60A;
  --cream: #FFF3CD;
  --coral: #FF6B6B;
}

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

body {
  font-family: 'Fredoka', sans-serif;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(255,214,10,0.18) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 90%, rgba(255,107,107,0.15) 0%, transparent 45%),
    linear-gradient(160deg, #00B4D8 0%, #0077B6 55%, #023E8A 100%);
  min-height: 100vh;
  color: var(--abyss);
  overflow-x: hidden;
}

/* subtle wavy grid overlay for underwater depth */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 60px, rgba(255,255,255,0.03) 60px, rgba(255,255,255,0.03) 61px),
    repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(255,255,255,0.03) 60px, rgba(255,255,255,0.03) 61px);
  pointer-events: none;
  z-index: 0;
}

#root { position: relative; z-index: 2; }

/* ===== BUBBLES ===== */
.bubbles { position: fixed; inset: 0; z-index: 1; pointer-events: none; overflow: hidden; }
.bubble {
  position: absolute;
  bottom: -50px;
  border-radius: 50%;
  background: rgba(255,255,255,0.22);
  border: 1px solid rgba(255,255,255,0.4);
  animation: rise linear infinite;
}
@keyframes rise {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  10%  { opacity: 0.8; }
  90%  { opacity: 0.5; }
  100% { transform: translateY(-112vh) translateX(30px); opacity: 0; }
}

/* ===== HERO ===== */
.shark-logo {
  display: inline-block;
  animation: swim 3s ease-in-out infinite;
  filter: drop-shadow(0 6px 10px rgba(0,0,0,0.3));
}
@keyframes swim {
  0%, 100% { transform: translateX(-16px) rotate(-7deg); }
  50%      { transform: translateX(16px) rotate(7deg); }
}
.title-splash {
  text-shadow: 0 4px 0 var(--deep), 0 0 26px rgba(255,214,10,0.55), 0 8px 24px rgba(0,0,0,0.25);
  letter-spacing: 0.5px;
}
.tagline { text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.section-title {
  font-family: 'Baloo 2', cursive;
  color: white;
  text-shadow: 0 3px 0 var(--deep), 0 6px 16px rgba(0,0,0,0.25);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease-out forwards; }
.fade-in-delay-1 { animation-delay: 0.1s; opacity: 0; }
.fade-in-delay-2 { animation-delay: 0.2s; opacity: 0; }
.fade-in-delay-3 { animation-delay: 0.3s; opacity: 0; }
.fade-in-delay-4 { animation-delay: 0.4s; opacity: 0; }
.fade-in-delay-5 { animation-delay: 0.5s; opacity: 0; }

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.spinner { animation: spin 1s linear infinite; }

@keyframes chomp { 0%,100% { transform: scale(1); } 50% { transform: scale(1.07); } }

/* ===== PORTHOLE CARDS ===== */
.porthole {
  background: rgba(255,243,205,0.94);
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.22), inset 0 0 0 3px rgba(255,255,255,0.5);
}

/* ===== DROP ZONE ===== */
.drop-zone {
  border: 4px dashed var(--deep);
  background: rgba(255,243,205,0.6);
  transition: all 0.25s ease;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--sun);
  background: rgba(255,214,10,0.28);
  transform: scale(1.01);
}
.sun-btn {
  background: var(--sun);
  color: var(--abyss);
  box-shadow: 0 4px 0 #d4a800;
  transition: all 0.15s ease;
}
.drop-zone:hover .sun-btn { transform: translateY(-2px); box-shadow: 0 6px 0 #d4a800; }

.rm-btn {
  background: var(--coral);
  color: white;
  box-shadow: 0 4px 0 #c94a4a;
  transition: all 0.15s ease;
}
.rm-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #c94a4a; }
.rm-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 #c94a4a; }

/* ===== EFFECT CARDS ===== */
.fx-card {
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}
.fx-card:hover { transform: translateY(-4px); }
.fx-card.selected {
  animation: chomp 0.35s ease;
  box-shadow: 0 0 22px rgba(255,214,10,0.6), 0 8px 20px rgba(0,0,0,0.2);
}

/* ===== POWER BUTTONS ===== */
.pow-btn {
  background: var(--cream);
  color: var(--deep);
  border: 3px solid var(--deep);
  font-family: 'Baloo 2', cursive;
  cursor: pointer;
}
.pow-btn:hover { transform: translateY(-3px); }
.pow-btn.on {
  background: var(--deep);
  color: var(--sun);
  box-shadow: 0 0 20px rgba(0,119,182,0.7);
}

/* ===== GENERATE BUTTON ===== */
.gen-btn {
  background: linear-gradient(135deg, var(--coral), #ff4d4d);
  color: white;
  font-family: 'Baloo 2', cursive;
  box-shadow: 0 7px 0 #c94a4a, 0 0 30px rgba(255,107,107,0.4);
  cursor: pointer;
  transition: all 0.18s ease;
}
.gen-btn:hover:not(.disabled) { transform: translateY(-3px) scale(1.03); box-shadow: 0 10px 0 #c94a4a, 0 0 44px rgba(255,107,107,0.55); }
.gen-btn:active:not(.disabled) { transform: translateY(3px); box-shadow: 0 3px 0 #c94a4a; }
.gen-btn.disabled {
  background: #9db4c0;
  box-shadow: 0 7px 0 #7a929e;
  cursor: not-allowed;
  color: rgba(255,255,255,0.6);
}

/* ===== PROGRESS ===== */
.prog-track {
  background: rgba(0,119,182,0.2);
  border-radius: 40px;
  height: 36px;
  position: relative;
  overflow: hidden;
}
.prog-fill {
  background: linear-gradient(90deg, var(--sun), var(--coral));
  height: 100%;
  border-radius: 40px;
  transition: width 0.3s ease;
}
.prog-shark {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 26px;
  transition: left 0.3s ease;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.3));
}

/* ===== RESULT ===== */
.aquarium {
  border: 8px solid white;
  border-radius: 20px;
  background: #001220;
  overflow: hidden;
  box-shadow: 0 0 0 4px var(--deep), 0 10px 26px rgba(0,0,0,0.3);
}
.aquarium video { width: 100%; display: block; }
.stat-chip {
  background: rgba(0,180,216,0.16);
  border-radius: 16px;
  padding: 12px 8px;
}
.dl-btn {
  background: linear-gradient(135deg, #2ecc71, #27ae60);
  color: white;
  box-shadow: 0 5px 0 #1e8449;
  transition: all 0.15s ease;
}
.dl-btn:hover { transform: translateY(-2px); box-shadow: 0 7px 0 #1e8449; }
.dl-btn:active { transform: translateY(2px); box-shadow: 0 3px 0 #1e8449; }
.reset-btn {
  background: rgba(0,119,182,0.15);
  color: var(--deep);
  border: 3px solid var(--deep);
  cursor: pointer;
  transition: all 0.15s ease;
}
.reset-btn:hover { background: rgba(0,119,182,0.3); transform: translateY(-2px); }

/* ===== ERROR ===== */
.err-box {
  background: var(--coral);
  color: white;
  padding: 14px 18px;
  border-radius: 16px;
  font-weight: 600;
  text-align: center;
  box-shadow: 0 4px 0 #c94a4a;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: rgba(0,60,110,0.2); }
::-webkit-scrollbar-thumb { background: var(--sun); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: #e6c009; }