.site-greeting {
    position: fixed;
    top: var(--spacing-lg, 20px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.65);
    color: var(--emotional-primary, #FFD700);
    padding: var(--spacing-sm, 8px) var(--spacing-md, 16px);
    border-radius: var(--radius-full, 25px);
    font-size: 1rem;
    z-index: 8500;
    animation: greetingFadeIn 0.4s ease forwards;
    backdrop-filter: blur(var(--backdrop-blur, 8px));
    border: 1px solid rgba(255, 255, 255, 0.15);
    pointer-events: none;
    white-space: nowrap;
}

.site-greeting.fade-out {
    animation: greetingFadeOut 0.6s ease forwards;
}

@keyframes greetingFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-15px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes greetingFadeOut {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(-15px);
    }
}

.theme-decoration-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 8000;
    overflow: hidden;
}

.theme-decoration {
    position: fixed;
    z-index: 8000;
    pointer-events: none;
    will-change: transform, opacity;
}

.anim-float {
    animation: decorationFloat 3s ease-in-out infinite;
}

.anim-fall {
    animation: decorationFall linear infinite;
}

.anim-float-up {
    animation: decorationFloatUp ease-in-out infinite;
}

.anim-sway {
    animation: decorationSway 3s ease-in-out infinite;
}

.anim-sparkle {
    animation: decorationSparkle 1.5s ease-in-out infinite;
}

.anim-flutter {
    animation: decorationFlutter 3s ease-in-out infinite;
}

.anim-hop {
    animation: decorationHop 2s ease-in-out infinite;
}

.anim-pulse {
    animation: decorationPulse 1.5s ease-in-out infinite;
}

@keyframes decorationFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes decorationFall {
    0% {
        transform: translateY(-30px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

@keyframes decorationFloatUp {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

@keyframes decorationSway {
    0%, 100% {
        transform: rotate(-5deg);
    }
    50% {
        transform: rotate(5deg);
    }
}

@keyframes decorationSparkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8) rotate(0deg);
    }
    50% {
        opacity: 1;
        transform: scale(1.3) rotate(180deg);
    }
}

@keyframes decorationFlutter {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(10px, -10px) rotate(5deg);
    }
    50% {
        transform: translate(0, -20px) rotate(0deg);
    }
    75% {
        transform: translate(-10px, -10px) rotate(-5deg);
    }
}

@keyframes decorationHop {
    0%, 100% {
        transform: translateY(0);
    }
    25% {
        transform: translateY(-15px);
    }
    50% {
        transform: translateY(0);
    }
    75% {
        transform: translateY(-10px);
    }
}

@keyframes decorationPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .theme-decoration,
    .site-greeting {
        animation: none !important;
        transition: none !important;
    }
}

@media (max-width: 768px) {
    .site-greeting {
        font-size: 0.9rem;
        padding: var(--spacing-xs, 6px) var(--spacing-sm, 12px);
    }
}

.theme-switcher {
    position: fixed;
    bottom: var(--spacing-lg, 20px);
    right: var(--spacing-lg, 20px);
    z-index: 10001;
}

.theme-toggle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(var(--backdrop-blur, 10px));
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    background: rgba(0, 0, 0, 0.8);
    border-color: var(--emotional-primary, #FFD700);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.theme-menu {
    position: absolute;
    bottom: 60px;
    right: 0;
    width: 320px;
    max-height: 500px;
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(var(--backdrop-blur, 15px));
    border-radius: var(--radius-lg, 15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.theme-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.theme-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md, 15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    font-weight: 700;
    color: #ffffff;
    font-size: 1.1rem;
}

.close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

.theme-options {
    padding: var(--spacing-md, 15px);
    max-height: 350px;
    overflow-y: auto;
}

.theme-options::-webkit-scrollbar {
    width: 6px;
}

.theme-options::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.theme-options::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.theme-options::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.theme-section {
    margin-bottom: var(--spacing-lg, 20px);
}

.theme-section:last-child {
    margin-bottom: 0;
}

.theme-section h4 {
    color: var(--emotional-primary, #FFD700);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm, 10px);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.theme-section button {
    width: 100%;
    padding: var(--spacing-sm, 10px) var(--spacing-md, 15px);
    margin-bottom: var(--spacing-xs, 5px);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md, 8px);
    color: #f0f0f0;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm, 8px);
}

.theme-section button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--emotional-primary, #FFD700);
    transform: translateX(5px);
}

.theme-footer {
    padding: var(--spacing-md, 15px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    gap: var(--spacing-md, 15px);
}

.auto-mode-toggle,
.sound-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs, 8px);
    color: #e8e8e8;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    flex: 1;
}

.auto-mode-toggle input[type="checkbox"],
.sound-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--emotional-primary, #FFD700);
}

@media (max-width: 768px) {
    .theme-switcher {
        bottom: var(--spacing-md, 15px);
        right: var(--spacing-md, 15px);
    }
    
    .theme-toggle {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
    }
    
    .theme-menu {
        width: 280px;
        max-height: 450px;
    }
}