:root {
  /* Default: Light mode variables */
  --bg-page: #f4f5f8;
  --bg-ambient: radial-gradient(circle at 50% 30%, rgba(176, 96, 104, 0.08) 0%, rgba(244, 245, 248, 0) 70%);
  --bg-card: #ffffff;
  --border-card: #e2e5ec;
  --card-shadow: 0 20px 50px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.03);
  
  --text-title: #111827;
  --text-title-accent: #9e323e;
  --text-tagline: #64748b;
  
  --badge-bg: #fdf2f2;
  --badge-border: #f8b4b4;
  --badge-text: #9a2331;
  --badge-dot: #b06068;
  
  --msg-bg: #fcf6f7;
  --msg-border: #edd2d6;
  --msg-border-accent: #b06068;
  --msg-text: #1f2937;
  --msg-text-strong: #0f172a;
  
  --feature-bg: #f8fafc;
  --feature-bg-hover: #f1f5f9;
  --feature-border: #e2e8f0;
  --feature-border-hover: rgba(176, 96, 104, 0.4);
  --feature-title: #0f172a;
  --feature-desc: #475569;
  
  --btn-bg: #b06068;
  --btn-hover: #9a4c54;
  --btn-text: #ffffff;
  --btn-shadow: 0 8px 24px rgba(176, 96, 104, 0.35);
  --btn-shadow-hover: 0 12px 30px rgba(176, 96, 104, 0.5);
  
  --hint-text: #64748b;
  
  --logo-pill-bg: transparent;
  --logo-pill-border: transparent;
  --logo-pill-shadow: none;
  --logo-pill-padding: 0;
  
  --toggle-btn-bg: #f1f3f7;
  --toggle-btn-text: #475569;
  --toggle-btn-border: #dbe0ea;
  --toggle-btn-hover: #e2e6ee;
  
  --font-family: 'Fira Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 24px;
}

/* System Dark Mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-page: #121118;
    --bg-ambient: radial-gradient(circle at 50% 30%, rgba(176, 96, 104, 0.16) 0%, rgba(18, 17, 24, 0) 70%);
    --bg-card: #1c1a24;
    --border-card: #2e2b3c;
    --card-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 2px 8px rgba(0, 0, 0, 0.4);
    
    --text-title: #ffffff;
    --text-title-accent: #f48c97;
    --text-tagline: #9ca3af;
    
    --badge-bg: rgba(176, 96, 104, 0.2);
    --badge-border: rgba(176, 96, 104, 0.45);
    --badge-text: #ff9da6;
    --badge-dot: #ff7584;
    
    --msg-bg: #23202e;
    --msg-border: #383348;
    --msg-border-accent: #b06068;
    --msg-text: #f3f4f6;
    --msg-text-strong: #ffffff;
    
    --feature-bg: #22202c;
    --feature-bg-hover: #292637;
    --feature-border: #302c40;
    --feature-border-hover: rgba(176, 96, 104, 0.5);
    --feature-title: #f9fafb;
    --feature-desc: #a3a7b4;
    
    --btn-bg: #b06068;
    --btn-hover: #c46d76;
    --btn-text: #ffffff;
    --btn-shadow: 0 8px 24px rgba(176, 96, 104, 0.45);
    --btn-shadow-hover: 0 12px 30px rgba(176, 96, 104, 0.65);
    
    --hint-text: #8e8c9c;
    
    --logo-pill-bg: #fff6f2;
    --logo-pill-border: rgba(255, 246, 242, 0.3);
    --logo-pill-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
    --logo-pill-padding: 8px 22px;
    
    --toggle-btn-bg: #282535;
    --toggle-btn-text: #d1d5db;
    --toggle-btn-border: #3b374d;
    --toggle-btn-hover: #332f44;
  }
}

/* Explicit theme overrides */
[data-theme="dark"] {
  --bg-page: #121118;
  --bg-ambient: radial-gradient(circle at 50% 30%, rgba(176, 96, 104, 0.16) 0%, rgba(18, 17, 24, 0) 70%);
  --bg-card: #1c1a24;
  --border-card: #2e2b3c;
  --card-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 2px 8px rgba(0, 0, 0, 0.4);
  
  --text-title: #ffffff;
  --text-title-accent: #f48c97;
  --text-tagline: #9ca3af;
  
  --badge-bg: rgba(176, 96, 104, 0.2);
  --badge-border: rgba(176, 96, 104, 0.45);
  --badge-text: #ff9da6;
  --badge-dot: #ff7584;
  
  --msg-bg: #23202e;
  --msg-border: #383348;
  --msg-border-accent: #b06068;
  --msg-text: #f3f4f6;
  --msg-text-strong: #ffffff;
  
  --feature-bg: #22202c;
  --feature-bg-hover: #292637;
  --feature-border: #302c40;
  --feature-border-hover: rgba(176, 96, 104, 0.5);
  --feature-title: #f9fafb;
  --feature-desc: #a3a7b4;
  
  --btn-bg: #b06068;
  --btn-hover: #c46d76;
  --btn-text: #ffffff;
  --btn-shadow: 0 8px 24px rgba(176, 96, 104, 0.45);
  --btn-shadow-hover: 0 12px 30px rgba(176, 96, 104, 0.65);
  
  --hint-text: #8e8c9c;
  
  --logo-pill-bg: #fff6f2;
  --logo-pill-border: rgba(255, 246, 242, 0.3);
  --logo-pill-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  --logo-pill-padding: 8px 22px;
  
  --toggle-btn-bg: #282535;
  --toggle-btn-text: #d1d5db;
  --toggle-btn-border: #3b374d;
  --toggle-btn-hover: #332f44;
}

[data-theme="light"] {
  --bg-page: #f4f5f8;
  --bg-ambient: radial-gradient(circle at 50% 30%, rgba(176, 96, 104, 0.08) 0%, rgba(244, 245, 248, 0) 70%);
  --bg-card: #ffffff;
  --border-card: #e2e5ec;
  --card-shadow: 0 20px 50px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.03);
  
  --text-title: #111827;
  --text-title-accent: #9e323e;
  --text-tagline: #64748b;
  
  --badge-bg: #fdf2f2;
  --badge-border: #f8b4b4;
  --badge-text: #9a2331;
  --badge-dot: #b06068;
  
  --msg-bg: #fcf6f7;
  --msg-border: #edd2d6;
  --msg-border-accent: #b06068;
  --msg-text: #1f2937;
  --msg-text-strong: #0f172a;
  
  --feature-bg: #f8fafc;
  --feature-bg-hover: #f1f5f9;
  --feature-border: #e2e8f0;
  --feature-border-hover: rgba(176, 96, 104, 0.4);
  --feature-title: #0f172a;
  --feature-desc: #475569;
  
  --btn-bg: #b06068;
  --btn-hover: #9a4c54;
  --btn-text: #ffffff;
  --btn-shadow: 0 8px 24px rgba(176, 96, 104, 0.35);
  --btn-shadow-hover: 0 12px 30px rgba(176, 96, 104, 0.5);
  
  --hint-text: #64748b;
  
  --logo-pill-bg: transparent;
  --logo-pill-border: transparent;
  --logo-pill-shadow: none;
  --logo-pill-padding: 0;
  
  --toggle-btn-bg: #f1f3f7;
  --toggle-btn-text: #475569;
  --toggle-btn-border: #dbe0ea;
  --toggle-btn-hover: #e2e6ee;
}

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

html {
  color-scheme: light dark;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-family);
  background-color: var(--bg-page);
  background-image: var(--bg-ambient);
  background-attachment: fixed;
  color: var(--msg-text);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 32px 16px;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Centered Notice Card */
.notice-card {
  position: relative;
  width: 100%;
  max-width: 650px;
  margin: auto;
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: 42px 38px;
  text-align: center;
  overflow: hidden;
  box-sizing: border-box;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  animation: cardFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Top accent bar on card */
.card-top-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #944b53, #b06068, #d4828b, #b06068);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  position: absolute;
  top: 18px;
  right: 20px;
  background: var(--toggle-btn-bg);
  border: 1px solid var(--toggle-btn-border);
  color: var(--toggle-btn-text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.theme-toggle-btn:hover {
  background: var(--toggle-btn-hover);
  transform: scale(1.06);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
}

/* Theme icon toggling via CSS */
.icon-sun {
  display: none;
}
.icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun {
    display: block;
  }
  :root:not([data-theme="light"]) .icon-moon {
    display: none;
  }
}

[data-theme="dark"] .icon-sun {
  display: block !important;
}
[data-theme="dark"] .icon-moon {
  display: none !important;
}

[data-theme="light"] .icon-sun {
  display: none !important;
}
[data-theme="light"] .icon-moon {
  display: block !important;
}

/* Brand Logo */
.brand-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 22px;
}

.brand-logo-pill {
  background-color: var(--logo-pill-bg);
  border: 1px solid var(--logo-pill-border);
  box-shadow: var(--logo-pill-shadow);
  padding: var(--logo-pill-padding);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.brand-logo-pill img {
  height: 44px;
  width: auto;
  max-width: 100%;
  display: block;
  object-fit: contain;
}

.brand-tagline {
  margin-top: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-tagline);
}

/* Notice Badge */
.notice-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.notice-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--badge-dot);
  box-shadow: 0 0 8px var(--badge-dot);
  animation: badgePulse 2s infinite ease-in-out;
}

@keyframes badgePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* Title */
.notice-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
  word-break: break-word;
}

.notice-title span {
  color: var(--text-title-accent);
}

/* Message Box */
.message-box {
  background-color: var(--msg-bg);
  border: 1px solid var(--msg-border);
  border-left: 4px solid var(--msg-border-accent);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  margin-bottom: 26px;
  text-align: left;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--msg-text);
  word-break: break-word;
}

.message-box p {
  margin: 0;
}

.message-box p + p {
  margin-top: 14px;
}

.message-box strong {
  color: var(--msg-text-strong);
  font-weight: 600;
}

.message-box .heart {
  color: #ff4d67;
  display: inline-block;
  animation: heartPulse 1.5s infinite;
}

@keyframes heartPulse {
  0%, 100% { transform: scale(1); }
  14% { transform: scale(1.25); }
  28% { transform: scale(1); }
  42% { transform: scale(1.25); }
  70% { transform: scale(1); }
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.feature-item {
  background-color: var(--feature-bg);
  border: 1px solid var(--feature-border);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.feature-item:hover {
  transform: translateY(-2px);
  border-color: var(--feature-border-hover);
  background-color: var(--feature-bg-hover);
}

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.feature-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--feature-title);
  margin-bottom: 4px;
}

.feature-desc {
  font-size: 0.78rem;
  color: var(--feature-desc);
  line-height: 1.45;
}

/* Action Button */
.action-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  max-width: 420px;
  background-color: var(--btn-bg);
  color: var(--btn-text) !important;
  text-decoration: none;
  font-size: 1.12rem;
  font-weight: 600;
  padding: 16px 28px;
  border-radius: 50px;
  box-shadow: var(--btn-shadow);
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.primary-btn:hover {
  background-color: var(--btn-hover);
  transform: translateY(-2px);
  box-shadow: var(--btn-shadow-hover);
  color: #ffffff !important;
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.2s ease;
}

.primary-btn:hover svg {
  transform: translateX(4px);
}

.redirect-hint {
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--hint-text);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  body {
    padding: 16px 12px;
  }

  .notice-card {
    padding: 26px 16px;
    border-radius: 18px;
  }

  .theme-toggle-btn {
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
  }

  .brand-logo-pill img {
    height: 34px;
  }

  .brand-tagline {
    font-size: 0.72rem;
    margin-top: 4px;
  }

  .notice-badge {
    font-size: 0.72rem;
    padding: 4px 10px;
    margin-bottom: 12px;
  }

  .notice-title {
    font-size: 1.3rem;
    line-height: 1.35;
    margin-bottom: 16px;
  }

  .notice-title span {
    display: inline-block;
  }

  .message-box {
    font-size: 0.94rem;
    line-height: 1.6;
    padding: 14px 14px;
    margin-bottom: 18px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 18px;
  }

  .feature-item {
    padding: 10px 12px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .feature-icon {
    font-size: 1.25rem;
    margin-bottom: 0;
  }

  .feature-text {
    flex: 1;
  }

  .feature-title {
    font-size: 0.86rem;
    margin-bottom: 2px;
  }

  .feature-desc {
    font-size: 0.75rem;
  }

  .primary-btn {
    font-size: 1rem;
    padding: 13px 18px;
  }

  .redirect-hint {
    font-size: 0.75rem;
    margin-top: 10px;
  }
}