body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #ffffff;
    background: #f5f7fa;
    color: #333;
    transition: background-color 0.4s, color 0.4s;
}

body.dark-theme {
    background-color: #121212;
    color: #e0e0e0;
}

header {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: background-color 0.4s, color 0.4s;
}

header.dark-theme {
    background-color: #1e1e1e;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: white;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #0056b3;
}

.slogan {
    font-family: 'Quicksand', sans-serif;
    font-size: 100%;
    color: lightgreen;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-style: italic;
}

.logo {
    width: 30%;
    position: right;
    height: 100px; 
    width: 100px;
}

.background_clowers {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.clowers_container {
    width: 200vw;
    height: 200vw;
    position: relative;
}

.clower {
    position: absolute;
    background-image: url(/static/image/clower.png);
    background-size: contain;
    background-repeat: no-repeat;
    transform-origin: center center;
    will-change: transform, opacity;
    animation-fill-mode: none;
    transform: translateY(0) translateX(0) rotate(var(--start-rotate, 0deg));
}

.clower:nth-child(1),
.clower:nth-child(4),
.clower:nth-child(7),
.clower:nth-child(10),
.clower:nth-child(13) {
    animation: float-slow 30s cubic-bezier(0.2, 0.8, 0.3, 1) infinite;
}

.clower:nth-child(2),
.clower:nth-child(5),
.clower:nth-child(8),
.clower:nth-child(11),
.clower:nth-child(14) {
    animation: float-medium 25s cubic-bezier(0.1, 0.7, 0.4, 1) infinite;
}

.clower:nth-child(3),
.clower:nth-child(6),
.clower:nth-child(9),
.clower:nth-child(12),
.clower:nth-child(15) {
    animation: float-fast 20s cubic-bezier(0, 0.5, 0.5, 1) infinite;
}

.clower:nth-child(16) {
    animation: float-very-slow 35s ease-in-out infinite;
}

.clower:nth-child(1) { width: 10vw; height: 10vw; top: 100vh; left: -20vw; animation-delay: 0s; --start-rotate: 45deg; }
.clower:nth-child(2) { width: 10vw; height: 10vw; top: 100vh; left: 5vw; animation-delay: -7s; --start-rotate: -30deg; }
.clower:nth-child(3) { width: 15vw; height: 15vw; top: 100vh; left: 25vw; animation-delay: -3s; --start-rotate: 60deg; }
.clower:nth-child(4) { width: 8vw; height: 8vw; top: 100vh; left: 45vw; animation-delay: -12s; --start-rotate: -15deg; }
.clower:nth-child(5) { width: 10vw; height: 10vw; top: 100vh; left: 65vw; animation-delay: -5s; --start-rotate: 75deg; }
.clower:nth-child(6) { width: 12vw; height: 12vw; top: 100vh; left: 85vw; animation-delay: -18s; --start-rotate: -45deg; }
.clower:nth-child(7) { width: 8vw; height: 8vw; top: 100vh; left: 105vw; animation-delay: -2s; --start-rotate: 30deg; }
.clower:nth-child(8) { width: 15vw; height: 15vw; top: 100vh; left: 125vw; animation-delay: -25s; --start-rotate: -60deg; }
.clower:nth-child(9) { width: 12vw; height: 12vw; top: 100vh; left: 145vw; animation-delay: -8s; --start-rotate: 15deg; }
.clower:nth-child(10) { width: 8vw; height: 8vw; top: 100vh; left: 165vw; animation-delay: -15s; --start-rotate: -75deg; }
.clower:nth-child(11) { width: 10vw; height: 12vw; top: 100vh; left: 15vw; animation-delay: -22s; --start-rotate: 90deg; }
.clower:nth-child(12) { width: 9vw; height: 9vw; top: 100vh; left: 35vw; animation-delay: -1s; --start-rotate: -90deg; }
.clower:nth-child(13) { width: 18vw; height: 18vw; top: 100vh; left: 55vw; animation-delay: -28s; --start-rotate: 0deg; }
.clower:nth-child(14) { width: 18vw; height: 18vw; top: 100vh; left: 90vw; animation-delay: -11s; --start-rotate: 120deg; }
.clower:nth-child(15) { width: 18vw; height: 18vw; top: 100vh; left: 95vw; animation-delay: -19s; --start-rotate: -120deg; }
.clower:nth-child(16) { width: 30vw; height: 30vw; top: 100vh; left: 115vw; animation-delay: -26s; --start-rotate: 180deg; }


/* Анимация очень медленного подъёма */
@keyframes float-very-slow {
    0% {
        transform: translateY(0) translateX(0) rotate(var(--start-rotate, 0deg));
        opacity: 0;
    }
    25% {
        opacity: 1;
        transform: translateY(-10vh) translateX(1vw) rotate(calc(var(--start-rotate, 0deg) + 5deg));
    }
    50% { transform: translateY(-30vh) translateX(-2vw) rotate(calc(var(--start-rotate, 0deg) + 20deg)); opacity: 1; }
    75% { transform: translateY(-60vh) translateX(2vw) rotate(calc(var(--start-rotate, 0deg) + 40deg)); opacity: 0.6; }
    90% { transform: translateY(-80vh) translateX(-1vw) rotate(calc(var(--start-rotate, 0deg) + 60deg)); opacity: 0.2; }
    100% {
        transform: translateY(-100vh) translateX(0) rotate(calc(var(--start-rotate, 0deg) + 90deg));
        opacity: 0;
    }
}

/* Анимация медленного подъёма */
@keyframes float-slow {
    0% {
        transform: translateY(0) translateX(0) rotate(var(--start-rotate, 0deg));
        opacity: 0;
    }
    20% {
        opacity: 1;
        transform: translateY(-15vh) translateX(2vw) rotate(calc(var(--start -rotate, 0deg) + 10deg));
    }
    40% { transform: translateY(-25vh) translateX(-3vw) rotate(calc(var(--start-rotate, 0deg) + 25deg)); opacity: 1; }
    60% { transform: translateY(-45vh) translateX(4vw) rotate(calc(var(--start-rotate, 0deg) + 40deg)); opacity: 0.7; }
    80% { transform: translateY(-70vh) translateX(-2vw) rotate(calc(var(--start-rotate, 0deg) + 55deg)); opacity: 0.3; }
    100% {
        transform: translateY(-100vh) translateX(0) rotate(calc(var(--start-rotate, 0deg) + 90deg));
        opacity: 0;
    }
}

/* Анимация среднего подъёма */
@keyframes float-medium {
    0% {
        transform: translateY(0) translateX(0) rotate(var(--start-rotate, 0deg));
        opacity: 0;
    }
    15% {
        opacity: 1;
        transform: translateY(-20vh) translateX(3vw) rotate(calc(var(--start-rotate, 0deg) + 15deg));
    }
    35% { transform: translateY(-35vh) translateX(-4vw) rotate(calc(var(--start-rotate, 0deg) + 30deg)); opacity: 1; }
    55% { transform: translateY(-55vh) translateX(5vw) rotate(calc(var(--start-rotate, 0deg) + 45deg)); opacity: 0.7; }
    75% { transform: translateY(-80vh) translateX(-3vw) rotate(calc(var(--start-rotate, 0deg) + 70deg)); opacity: 0.3; }
    100% {
        transform: translateY(-100vh) translateX(0) rotate(calc(var(--start-rotate, 0deg) + 90deg));
        opacity: 0;
    }
}

/* Анимация быстрого подъёма */
@keyframes float-fast {
    0% {
        transform: translateY(0) translateX(0) rotate(var(--start-rotate, 0deg));
        opacity: 0;
    }
    10% {
        opacity: 1;
        transform: translateY(-25vh) translateX(4vw) rotate(calc(var(--start-rotate, 0deg) + 20deg));
    }
    30% { transform: translateY(-40vh) translateX(-5vw) rotate(calc(var(--start-rotate, 0deg) + 35deg)); opacity: 1; }
    50% { transform: translateY(-60vh) translateX(6vw) rotate(calc(var(--start-rotate, 0deg) + 50deg)); opacity: 0.7; }
    70% { transform: translateY(-85vh) translateX(-4vw) rotate(calc(var(--start-rotate, 0deg) + 80deg)); opacity: 0.3; }
    100% {
        transform: translateY(-100vh) translateX(0) rotate(calc(var(--start-rotate, 0deg) + 120deg));
        opacity: 0;
    }
}

/* Эффект свечения для тёмной темы */
body.dark-theme .clower {
    filter:
        drop-shadow(0 0 20px rgba(153, 255, 204, 0.6))
        drop-shadow(0 0 40px rgba(153, 255, 204, 0.4))
        drop-shadow(0 0 60px rgba(153, 255, 204, 0.2));
}

/* Анимация свечения */
@keyframes pulse-glow {
    0% {
        filter:
            drop-shadow(0 0 15px rgba(153, 255, 204, 0.5))
            drop-shadow(0 0 30px rgba(153, 255, 204, 0.3))
            drop-shadow(0 0 45px rgba(153, 255, 204, 0.1));
    }
    50% {
        filter:
            drop-shadow(0 0 25px rgba(153, 255, 204, 0.7))
            drop-shadow(0 0 50px rgba(153, 255, 204, 0.5))
            drop-shadow(0 0 75px rgba(153, 255, 204, 0.3));
    }
    100% {
        filter:
            drop-shadow(0 0 15px rgba(153, 255, 204, 0.5))
            drop-shadow(0 0 30px rgba(153, 255, 204, 0.3))
            drop-shadow(0 0 45px rgba(153, 255, 204, 0.1));
    }
}

/* Применение пульсации к некоторым клеверам */
.clower:nth-child(odd) {
    animation: float-slow 30s cubic-bezier(0.2, 0.8, 0.3, 1) infinite,
              pulse-glow 5s ease-in-out infinite alternate;
}

.clower:nth-child(even) {
    animation: float-medium 25s cubic-bezier(0.1, 0.7, 0.4, 1) infinite;
}

.language-switcher {
    display: flex;
    gap: 10px;
    margin: 10px;
}

.lang-btn {
    padding: 8px 16px;
    text-decoration: none;
    color: #333;
    background: #f0f0f0;
    border-radius: 4px;
    transition: background 0.3s;
}

.lang-btn:hover {
    background: #ddd;
}

.lang-btn.active {
    background: #007bff;
    color: white;
}

.btn_donate,
.lang-btn {
    text-decoration: none;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease, box-shadow 0.2s ease;
    display: inline-block;
    
    color: #333;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}


.btn_donate:hover
 {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgb(108, 229, 116);
}

.lang-btn:hover {
    transform: translateY(-2px);
}

.lang-btn.active {
    background: linear-gradient(145deg, #007bff, #0056b3);
    color: white;
}

body.dark-theme .menu,
body.dark-theme .lang-btn {
    background: linear-gradient(145deg, #2a2a2a, #1e1e1e);
    color: #e0e0e0;
}

body.dark-theme .btn_donate {
    background: linear-gradient(145deg, #00aaff, #007acc);
}

body.dark-theme .menu:hover,
body.dark-theme .btn_donate:hover,
body.dark-theme .lang-btn:hover {
    box-shadow: 0 6px 12px rgba(255,255,255,0.1);
}

body.dark-theme header {
    background: linear-gradient(135deg, rgba(28, 30, 28, 0.9), rgba(42, 42, 42, 0.9));
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

.menu {
    background: #99ff99;
    display: inline-block;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    color: inherit;
    position: relative;
    padding: 8px 0;
}

.menu::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    background: #007bff;
    transition: width 0.3s ease, left 0.3s ease;
}

.menu:hover::after {
    width: 100%;
    left: 0;
}

body.dark-theme .menu {
    color: inherit;
}
body.dark-theme .menu::after {
    background: #00aaff;
}

/* Кнопки */
.btn_donate,
.lang-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease, box-shadow 0.2s ease;
}

.btn_donate {
    background: linear-gradient(145deg, #ff6b6b, #ff8e53);
    color: white;
    box-shadow: 0 4px 12px rgba(255,107,107,0.2);
}

.btn_donate:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255,107,107,0.3);
}

/* Кнопки языка */
.lang-btn {
    background: linear-gradient(145deg, #f0f4f8, #d9d9d9);
    color: #333;
}

.lang-btn.active {
    background: linear-gradient(145deg, #6a11cb, #2575fc);
    color: white !important;
}

.lang-btn.active::after {
    content: '';
    position: absolute;
}

/* Тёмная тема для кнопок */
body.dark-theme .btn_donate {
    background: linear-gradient(145deg, #ff9f43, #ff6b6b);
}
body.dark-theme .lang-btn {
    background: linear-gradient(145deg, #2a2a2a, #1e1e1e);
}

/* Футер */
.site-footer {
    background-color: #f8f9fa;
    color: #333;
    padding-top: 2rem;
    padding-bottom: 2rem;
    padding-left: 1rem;
    padding-right: 1rem;
}

body.dark-theme .site-footer {
    background-color: #2a2a2a;
    color: #e0e0e0;
}

.footer-content {
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.site-footer h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    padding-bottom: 0.25rem;
}

body.dark-theme .site-footer h3 {
    border-color: #555;
}

.site-footer ul {
    list-style: none;
    padding-left: 0;
}

.site-footer li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.copyright {
    text-align: center;
    font-size: 0.85rem;
    margin-top: 1rem;
    padding-bottom: 1rem;
    border-top: 1px solid #dee2e6;
    width: 100%;
}

body.dark-theme .copyright {
    border-color: #444;
}

nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.menu, .btn_donate {
    text-decoration: none;
    color: inherit;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 40px;
    transition: background-color 0.2s;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #fff;
}

#menu-toggle {
    display: none;
}

nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav .theme-toggle-desktop {
    background-color: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.5rem 0.75rem;
}

#theme-toggle-desktop {
    display: inline-block; 
    background: none;
    border: none;
    color: inherit;
    font-size: 1.2rem;
    padding: 0;
    cursor: pointer;
}

#theme-toggle-mobile {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: #007bff;
    color: white;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

/* Для мобильных устройств */
@media (max-width: 768px) {
    body {
        background-color: #f0f8ff;
        background-image: none;
        animation: none;
        overflow-x: hidden;
    }

    header {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        padding: 1.25rem 0.75rem;
        position: relative;
    }

    /* Кнопка бургера */
    #menu-toggle {
        display: block;
        background-color: #007bff;
        color: white;
        border: none;
        width: 100%;
        text-align: left;
        padding: 0.625rem 0.75rem;
        font-size: 1rem;
        cursor: pointer;
        border-radius: 4px;
        box-shadow: none;
        transform: translateZ(0);
    }

    /* Логотип и заголовок */
    .slogan {
        width: 100%;
        justify-content: flex-start;
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    .logo {
        width: 44px;
        height: auto;
        image-rendering: crisp-edges;
    }

    .slogan h1 {
        font-size: 1.5rem;
        margin: 0;
        line-height: 1.2;
    }

    /* Меню */
    nav ul {
        display: none;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.95);
        border-radius: 8px;
        margin-top: 8px;
        box-shadow: none;
    }

    nav li {
        border-bottom: none;
    }

    nav a {
        display: block;
        width: 85%;
        max-width: 240px;
        padding: 0.875rem 1.25rem;
        text-align: center;
        text-decoration: none;
        font-size: 1rem;
        font-weight: 600;
        color: #333;
        border-radius: 9999px;
        background-color: transparent;
        border: 1px solid #63ea61;
        transition: background-color 0.15s ease;
    }

    nav a:hover {
        background-color: #f8f9fa;
    }

    nav.active ul { 
        display: block; 
    }

    /* Переключатели темы */
    .theme-toggle-desktop {
        display: none;
    }

    #theme-toggle {
        position: fixed;
        top: 0.75rem;
        right: 0.75rem;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background-color: #007bff;
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
        border: none;
        font-size: 1.1rem;
        z-index: 1050;
        cursor: pointer;
        transform: translateZ(0);
    }

    #theme-toggle-desktop {
        display: none;
    }

    #theme-toggle-mobile {
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 0.75rem;
        right: 0.75rem;
        z-index: 1050;
    }

    body {
        background-color: #f0f8ff;
        background-image: none;
        animation: none;
        overflow-x: hidden;
        margin: 0;
        padding: 0;
    }

    /* Фон клеверов */
    .background_clowers {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        z-index: -1;
        pointer-events: none;
        overflow: hidden;
    }

    .clowers_container {
        width: 100%;
        height: 100%;
        position: relative;
    }

    .clower {
        position: absolute;
        background-image: url('/static/image/clower.png');
        background-size: contain;
        background-repeat: no-repeat;
        will-change: transform, opacity;
        filter: none;
        animation-fill-mode: forwards;
        border-radius: 50%;
        box-shadow: none;
        pointer-events: none;
        min-height: 20px;
    }

    @keyframes float-mobile {
        0% {
            opacity: 0;
            transform: translateY(110vh) scale(0.8);
        }
        10% {
            opacity: 1;
        }
        100% {
            opacity: 0;
            transform: translateY(-120vh) scale(0.7);
        }
    }

    .clower:nth-child(1) {
        width: clamp(80px, 18vw, 160px);
        height: clamp(80px, 18vw, 160px);
        top: -80px;
        left: 25vw;
        animation: float-mobile 18s ease-out infinite -3s forwards;
    }

    .clower:nth-child(2) {
        width: clamp(60px, 14vw, 120px);
        height: clamp(60px, 14vw, 120px);
        top: -90px;
        left: 75vw;
        animation: float-mobile 22s ease-out infinite -8s forwards;
    }

    .clower:nth-child(3) {
        width: clamp(90px, 20vw, 180px);
        height: clamp(90px, 20vw, 180px);
        top: -70px;
        left: 50vw;
        animation: float-mobile 20s ease-out infinite -5s forwards;
    }

    .clower:nth-child(4) {
        width: clamp(100px, 24vw, 220px);
        height: clamp(100px, 24vw, 220px);
        top: -100px;
        left: 30vw;
        animation: float-mobile 25s ease-in-out infinite -1s forwards;
    }

    .clower:nth-child(5) {
        width: clamp(70px, 16vw, 140px);
        height: clamp(70px, 16vw, 140px);
        top: -110px;
        left: 60vw;
        animation: float-mobile 24s ease-out infinite -7s forwards;
    }

    .clower:nth-child(6) {
        width: clamp(85px, 19vw, 170px);
        height: clamp(85px, 19vw, 170px);
        top: -120px;
        left: 40vw;
        animation: float-mobile 21s ease-out infinite -4s forwards;
    }

    .clower:nth-child(n+7) {
        display: none;
    }

    body.dark-theme .clower {
        filter: none;
    }
}