:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --border: #334155;
  --pixel: #1e293b;
  --pixel-hover: #334155;
  --text: #f8fafc;
  --accent: #0ea5e9;
  --win: #39ff14;
  --gold: #fbbf24;
  --azure: #38bdf8;
  --violet: #a78bfa;
}

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

body {
  background-color: var(--bg);
  background-image: radial-gradient(circle at 50% 0%, rgba(14, 165, 233, 0.08), transparent 60%);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  padding: 10px 16px;
}

/* Page layout: side ads + central game content */
.page-layout {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
  width: 100%;
  max-width: 1200px;
}

.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  max-width: 720px;
  width: 100%;
}

.game-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}

/* Sidebar ad banners (desktop) */
.ad-banner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 160px;
  flex-shrink: 0;
  padding: 16px 12px;
  background-color: rgba(30, 41, 59, 0.6);
  border: 2px dashed var(--border);
  border-radius: 12px;
  text-align: center;
}

.ad-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(248, 250, 252, 0.45);
}

.ad-space {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(14, 165, 233, 0.7);
  letter-spacing: 1px;
}

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 600px;
  background-color: rgba(15, 23, 42, 0.8);
  border: 1px dashed rgba(51, 65, 85, 0.8);
  border-radius: 8px;
}

.ad-placeholder-wide {
  min-height: 50px;
  width: 100%;
  max-width: 320px;
}

.ad-placeholder-text {
  font-size: 0.75rem;
  color: rgba(248, 250, 252, 0.25);
  letter-spacing: 1px;
}

.ad-banner-mobile {
  display: none;
  width: 100%;
  max-width: 360px;
  margin-top: 8px;
}

@media (max-width: 900px) {
  .ad-banner-left,
  .ad-banner-right {
    display: none;
  }

  .ad-banner-mobile {
    display: flex;
  }

  .page-layout {
    flex-direction: column;
    align-items: center;
  }

  .main-content {
    max-width: 100%;
  }

  #grid-wrapper {
    max-width: min(96vw, 680px);
    padding: 10px;
  }

  body {
    padding: 12px 10px;
    gap: 8px;
  }
}

h1 {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(14, 165, 233, 0.7), 0 0 40px rgba(14, 165, 233, 0.3);
  margin-bottom: 28px;
  line-height: 1.2;
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.5rem;
    margin-bottom: 20px;
  }
}

/* Daily Enigma box */
#enigma-box {
  width: 100%;
  max-width: 560px;
  background-color: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 6px 12px;
  text-align: center;
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.3), inset 0 0 12px rgba(14, 165, 233, 0.06);
  animation: glow 3s ease-in-out infinite;
  margin-bottom: 4px;
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 15px rgba(14, 165, 233, 0.35), inset 0 0 15px rgba(14, 165, 233, 0.08); }
  50% { box-shadow: 0 0 25px rgba(14, 165, 233, 0.6), inset 0 0 20px rgba(14, 165, 233, 0.12); }
}

#enigma-box h2 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 4px;
}

#enigma-text {
  font-size: 0.82rem;
  font-style: italic;
  color: var(--text);
  opacity: 0.9;
  line-height: 1.4;
}

/* PRO Sponsor box — unified compact layout */
#sponsor-pro-box {
  width: 100%;
  max-width: 560px;
  background-color: var(--panel);
  border-radius: 10px;
  padding: 6px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sponsor-content {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sponsor-text {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text);
  flex: 1;
  text-align: left;
}

.sponsor-cta {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 4px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.sponsor-cta-text {
  font-size: 0.75rem;
  line-height: 1.3;
  color: var(--text);
  opacity: 0.75;
  flex: 1;
  text-align: left;
}

#sponsor-pro-box.sponsor-active {
  border: 1px solid #f59e0b;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.4), inset 0 0 15px rgba(245, 158, 11, 0.08);
  animation: sponsor-glow 3s ease-in-out infinite;
}

@keyframes sponsor-glow {
  0%, 100% { box-shadow: 0 0 15px rgba(245, 158, 11, 0.4), inset 0 0 15px rgba(245, 158, 11, 0.08); }
  50% { box-shadow: 0 0 25px rgba(245, 158, 11, 0.65), inset 0 0 20px rgba(245, 158, 11, 0.12); }
}

#sponsor-pro-box.sponsor-active strong {
  color: #f59e0b;
}

#sponsor-pro-box.sponsor-free {
  border: 1px dashed #a855f7;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.3);
}

.btn-sponsor {
  font-weight: 600;
  font-size: 0.72rem;
  padding: 4px 10px;
  white-space: nowrap;
}

.sponsor-active .btn-sponsor-visit {
  background-color: #f59e0b;
  color: #0f172a;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
}

.sponsor-active .btn-sponsor-promote,
.sponsor-free .btn-sponsor-promote {
  background-color: #a855f7;
  color: #f8fafc;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.5);
}

@media (max-width: 600px) {
  .sponsor-content,
  .sponsor-cta {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .sponsor-text,
  .sponsor-cta-text {
    text-align: center;
    width: 100%;
  }
  .btn-sponsor {
    align-self: center;
  }
}

/* Counter + user bar */
#status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

#counter {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 0.82rem;
}

#counter strong {
  color: var(--accent);
}

#user-info {
  font-size: 0.75rem;
  opacity: 0.8;
}

#user-info a {
  color: var(--accent);
  text-decoration: none;
}

#user-info a:hover {
  text-decoration: underline;
}

#message {
  min-height: 1.2em;
  font-size: 0.85rem;
  transition: color 0.3s;
  margin: 0 0 4px 0;
}

#message.win {
  color: var(--win);
}

#message.lose {
  color: var(--accent);
}

/* Sponsor LED frame around the grid — hero element */
#grid-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: min(680px, 92vw);
  padding: 12px;
  background-color: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border);
  border-radius: 14px;
  flex-shrink: 0;
}

#middle-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
  width: 100%;
}

.led-row {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 100%;
  min-height: 12px;
}

.led-col {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  min-width: 12px;
}

.led {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: transform 0.15s;
  flex-shrink: 0;
}

.led:hover {
  transform: scale(1.5);
}

.led.free {
  background-color: #2a3a50;
  opacity: 0.55;
  box-shadow: none;
  border: 1px solid rgba(255,255,255,0.08);
}

.led.gold {
  background-color: var(--gold);
  box-shadow: 0 0 8px var(--gold);
}

.led.azure {
  background-color: var(--azure);
  box-shadow: 0 0 8px var(--azure);
}

.led.violet {
  background-color: var(--violet);
  box-shadow: 0 0 8px var(--violet);
}

/* Responsive centered grid (size driven by GRID_SIZE from Python) */
#grid {
  display: grid;
  flex: 1;
  min-width: 0;
  aspect-ratio: 1 / 1;
  gap: 1px;
}

.pixel {
  background-color: var(--pixel);
  cursor: pointer;
  transition: background-color 0.15s;
}

.pixel:hover {
  background-color: var(--pixel-hover);
}

.pixel.wrong {
  background-color: var(--accent);
}

.pixel.winner {
  background-color: var(--win);
  box-shadow: 0 0 8px var(--win);
}

/* Floating tooltip (grid + sponsor LEDs) */
#tooltip {
  position: fixed;
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.8rem;
  pointer-events: none;
  display: none;
  z-index: 10;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* Modal overlays (blurred dark backdrop) */
.overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(2, 6, 23, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.overlay.visible {
  display: flex;
}

.modal {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal h2 {
  font-size: 1.2rem;
  font-weight: 600;
}

.modal p {
  font-size: 0.95rem;
  line-height: 1.5;
}

#ref-link {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--accent);
  word-break: break-all;
  user-select: all;
}

.popup-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: opacity 0.2s;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  opacity: 0.85;
}

.btn-copy {
  background-color: var(--accent);
  color: #0f172a;
}

.btn-whatsapp {
  background-color: #25d366;
  color: #0f172a;
}

.btn-google {
  background-color: #f8fafc;
  color: #0f172a;
  font-weight: 600;
  box-shadow: 0 0 14px rgba(14, 165, 233, 0.45);
}

.btn-close {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

/* Login error message inside the modal */
.login-error {
  display: none;
  color: #f87171;
  background-color: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.35);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.88rem;
  line-height: 1.4;
}

.login-error.visible {
  display: block;
}

/* Sponsor checkout modal */
.modal-sponsor {
  max-width: 440px;
  text-align: left;
}

.sponsor-modal-desc {
  font-size: 0.88rem;
  opacity: 0.75;
  text-align: center;
}

.sponsor-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: rgba(248, 250, 252, 0.75);
}

.form-field input[type="text"],
.form-field input[type="url"] {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.9rem;
}

.form-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.25);
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-picker-row input[type="color"] {
  width: 44px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  cursor: pointer;
}

.color-picker-row input[type="text"] {
  flex: 1;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: monospace;
}

.sponsor-locked {
  justify-content: center !important;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 4px;
}

.sponsor-locked .sponsor-cta-text {
  text-align: center;
  opacity: 0.5;
  font-size: 0.78rem;
}

.sponsor-form-error {
  color: #f87171;
  font-size: 0.85rem;
  min-height: 1.2em;
  text-align: center;
}

.payment-notice {
  background-color: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.35);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--win);
  text-align: center;
  max-width: 560px;
  margin: 0;
}

.led.owned {
  opacity: 1;
}

.led.owned.gold,
.led.owned.azure,
.led.owned.violet {
  border: 1px solid rgba(255,255,255,0.15);
}