:root {
  --bg0: #0a0a1f;
  --bg1: #141235;
  --panel: rgba(24, 20, 55, 0.72);
  --pink: #ff4fd8;
  --cyan: #39e6ff;
  --lime: #a3ff3c;
  --ink: #ece9ff;
  --muted: #8f8ac0;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: "Bricolage Grotesque", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(255,79,216,0.25), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(57,230,255,0.20), transparent 55%),
    linear-gradient(160deg, var(--bg0), var(--bg1));
  background-attachment: fixed;
  min-height: 100vh;
}

.sprk-root { min-height: 100vh; display: flex; flex-direction: column; }

/* Header */
.sprk-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  background: linear-gradient(90deg, #7a1fff, var(--pink) 45%, var(--cyan));
  background-size: 200% 100%;
  animation: shimmer 8s linear infinite;
  box-shadow: 0 4px 30px rgba(255,79,216,0.35);
  position: sticky; top: 0; z-index: 30;
}
@keyframes shimmer { to { background-position: 200% 0; } }
.sprk-title {
  font-weight: 800; font-size: clamp(18px, 3vw, 28px);
  color: #fff; text-shadow: 0 2px 0 rgba(0,0,0,0.25); letter-spacing: -0.5px; margin: 0;
}
.sprk-online {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 14px;
  background: rgba(0,0,0,0.28); padding: 6px 12px; border-radius: 999px; color: #fff;
}
.sprk-dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--lime);
  box-shadow: 0 0 0 0 rgba(163,255,60,0.7); animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(163,255,60,0.6); }
  70% { box-shadow: 0 0 0 10px rgba(163,255,60,0); }
  100% { box-shadow: 0 0 0 0 rgba(163,255,60,0); }
}

/* Main layout */
.sprk-main {
  flex: 1; display: flex; gap: 18px; padding: 18px;
  max-width: 1200px; width: 100%; margin: 0 auto;
}
.sprk-game-panel { flex: 1.5; display: flex; align-items: flex-start; justify-content: center; }

/* Arcade cabinet */
.sprk-cabinet {
  background: linear-gradient(180deg, #1c1748, #120f30);
  border: 2px solid rgba(255,79,216,0.4);
  border-radius: 22px; padding: 16px;
  box-shadow: 0 0 40px rgba(57,230,255,0.18), inset 0 0 20px rgba(0,0,0,0.4);
  max-width: 400px; width: 100%;
}
.sprk-cabinet-top {
  display: flex; justify-content: space-between; align-items: center;
  color: var(--cyan); font-family: "JetBrains Mono", monospace; font-size: 11px;
  letter-spacing: 3px; margin-bottom: 10px; opacity: 0.7;
}
.sprk-cab-label { color: var(--lime); font-weight: 700; }
.sprk-screen {
  background: #000; border-radius: 12px; padding: 8px;
  display: flex; justify-content: center;
  border: 1px solid rgba(255,255,255,0.08);
}
.sprk-screen iframe { border-radius: 6px; display: block; max-width: 100%; }
.sprk-caption {
  text-align: center; margin-top: 12px; color: var(--muted);
  font-size: 13px; font-weight: 700;
}

/* Chat panel */
.sprk-chat-panel {
  flex: 1; display: flex; flex-direction: column;
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px; overflow: hidden;
  min-height: 460px; max-height: 78vh;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}
.sprk-chat-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; font-weight: 800; font-size: 15px;
  background: rgba(255,79,216,0.14);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sprk-notice {
  font-size: 12px; padding: 8px 14px; background: rgba(57,230,255,0.1);
  color: var(--cyan); border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sprk-messages {
  flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 12px;
  scrollbar-width: thin; scrollbar-color: var(--pink) transparent;
}
.sprk-messages::-webkit-scrollbar { width: 6px; }
.sprk-messages::-webkit-scrollbar-thumb { background: var(--pink); border-radius: 3px; }

.sprk-empty { margin: auto; color: var(--muted); text-align: center; font-size: 14px; padding: 20px; }

.sprk-msg-row { display: flex; gap: 8px; align-items: flex-start; }
.sprk-msg-row.mine { flex-direction: row-reverse; }
.sprk-avatar {
  width: 30px; height: 30px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #0a0a1f; font-size: 14px;
}
.sprk-bubble-wrap { max-width: 78%; display: flex; flex-direction: column; }
.sprk-msg-row.mine .sprk-bubble-wrap { align-items: flex-end; }
.sprk-meta { display: flex; gap: 8px; align-items: baseline; margin-bottom: 3px; }
.sprk-uname { font-weight: 800; font-size: 12px; }
.sprk-time { font-size: 10px; color: var(--muted); font-family: "JetBrains Mono", monospace; }
.sprk-bubble {
  background: rgba(255,255,255,0.06); padding: 8px 12px; border-radius: 14px;
  border-top-left-radius: 4px; font-size: 14px; line-height: 1.4; word-break: break-word;
  border: 1px solid rgba(255,255,255,0.06);
}
.sprk-bubble.mine {
  background: linear-gradient(135deg, var(--pink), #ff7ee0);
  color: #0a0a1f; font-weight: 600; border: none;
  border-top-left-radius: 14px; border-top-right-radius: 4px;
}

/* Input */
.sprk-emoji-tray {
  display: flex; gap: 4px; padding: 6px 10px; flex-wrap: wrap;
  background: rgba(0,0,0,0.25); border-top: 1px solid rgba(255,255,255,0.06);
}
.sprk-emoji { background: none; border: none; font-size: 20px; cursor: pointer; padding: 2px 4px; border-radius: 6px; }
.sprk-emoji:hover { background: rgba(255,255,255,0.1); }
.sprk-input-row {
  display: flex; gap: 8px; padding: 10px; align-items: center;
  background: rgba(0,0,0,0.25); border-top: 1px solid rgba(255,255,255,0.08);
}
.sprk-input {
  flex: 1; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12);
  color: var(--ink); border-radius: 999px; padding: 10px 16px; font-size: 14px;
  font-family: inherit; outline: none;
}
.sprk-input:focus { border-color: var(--pink); box-shadow: 0 0 0 3px rgba(255,79,216,0.2); }
.sprk-input::placeholder { color: var(--muted); }
.sprk-send {
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  color: #0a0a1f; font-weight: 800; border: none; border-radius: 999px;
  padding: 10px 18px; cursor: pointer; font-family: inherit; transition: transform .1s;
}
.sprk-send:hover:not(:disabled) { transform: scale(1.05); }
.sprk-send:disabled { opacity: 0.4; cursor: not-allowed; }
.sprk-mini-btn {
  background: rgba(255,255,255,0.12); border: none; color: var(--ink);
  border-radius: 8px; width: 34px; height: 34px; cursor: pointer; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
}
.sprk-mini-btn:hover { background: rgba(255,255,255,0.22); }

/* Footer */
.sprk-footer {
  text-align: center; padding: 14px; color: var(--muted); font-size: 12px;
}
.sprk-link { color: var(--cyan); text-decoration: none; font-weight: 700; }
.sprk-link:hover { text-decoration: underline; }

/* FAB */
.sprk-fab {
  position: fixed; bottom: 20px; right: 20px; z-index: 40;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  color: #0a0a1f; font-weight: 800; border: none; border-radius: 999px;
  padding: 14px 22px; cursor: pointer; font-family: inherit; font-size: 15px;
  box-shadow: 0 6px 24px rgba(255,79,216,0.5);
}

/* Modal */
.sprk-modal-bg {
  position: fixed; inset: 0; z-index: 50; display: flex; align-items: center; justify-content: center;
  background: rgba(4,3,15,0.7); backdrop-filter: blur(6px); padding: 20px;
}
.sprk-modal {
  background: linear-gradient(180deg, #1c1748, #120f30);
  border: 1px solid rgba(255,79,216,0.4); border-radius: 20px;
  padding: 26px; width: 100%; max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.sprk-modal-title { font-weight: 800; font-size: 20px; margin: 0 0 16px; }
.sprk-color-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0; justify-content: center; }
.sprk-color-dot {
  width: 34px; height: 34px; border-radius: 50%; border: 2px solid transparent; cursor: pointer;
  transition: transform .1s;
}
.sprk-color-dot.sel { border-color: #fff; transform: scale(1.15); box-shadow: 0 0 12px currentColor; }
.sprk-cta {
  width: 100%; margin-top: 8px;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  color: #0a0a1f; font-weight: 800; border: none; border-radius: 12px;
  padding: 12px; cursor: pointer; font-family: inherit; font-size: 15px;
}
.sprk-cta:hover { filter: brightness(1.08); }

/* Mobile */
@media (max-width: 899px) {
  .sprk-main { flex-direction: column; padding: 12px; }
  .sprk-game-panel { flex: none; }
  .sprk-chat-panel { max-height: 60vh; min-height: 360px; }
  .sprk-chat-panel.collapsed { display: none; }
}