/* CSS Variables for theming */
:root {
    /* Telegram brand colors */
    --telegram-blue: #0088cc;
    --telegram-blue-light: #32a8e6;
    --telegram-blue-dark: #006699;

    /* Accent colors matching the loader */
    --accent-color: rgb(116, 204, 197);
    --accent-glow: rgba(116, 204, 197, 0.4);
}

/* Light theme (default) */
[data-theme="light"] {
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(0, 136, 204, 0.2);
    --glow-opacity: 0.15;
}

/* Dark theme */
[data-theme="dark"] {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0c0;
    --card-bg: rgba(30, 30, 50, 0.8);
    --card-border: rgba(116, 204, 197, 0.3);
    --glow-opacity: 0.25;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Snowfall canvas */
#snowfall {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    will-change: contents;
    contain: strict;
}

/* Container */
.layout-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    width: 100%;
    z-index: 1;
    gap: 0;
    /* Adjusted dynamically */
}

.container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 40px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--card-border);
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 100px var(--accent-glow);
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
    will-change: transform, opacity;
    transform: translateZ(0);
    /* Hardware acceleration */
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* TGS Animation container */
.tgs-container {
    position: relative;
    width: 180px;
    height: 180px;
    min-width: 180px;
    min-height: 180px;
    margin-bottom: 20px;
    z-index: 10;
    pointer-events: none;
    animation: fadeInUp 0.8s ease-out;
    filter: drop-shadow(0 0 30px rgba(100, 200, 255, 0.6));
    will-change: transform;
    transform: translateZ(0);
}

.tgs-container svg {
    width: 100% !important;
    height: 100% !important;
}

/* Title */
.title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    text-align: center;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.highlight {
    background: linear-gradient(135deg, var(--telegram-blue), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Subtitle */
.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 24px;
    text-align: center;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* Telegram Button */
.telegram-button {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--telegram-blue), var(--telegram-blue-light));
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow:
        0 10px 30px rgba(0, 136, 204, 0.4),
        0 0 0 0 rgba(0, 136, 204, 0);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.telegram-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow:
        0 15px 40px rgba(0, 136, 204, 0.5),
        0 0 30px rgba(116, 204, 197, 0.3);
}

.telegram-button:active {
    transform: translateY(-1px) scale(0.98);
}

.telegram-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.telegram-button:hover .telegram-icon {
    transform: scale(1.1) rotate(-5deg);
}

/* Ripple effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Decorative glows - Optimized with radial gradients instead of blur filter */
.glow {
    position: fixed;
    border-radius: 50%;
    /* filter: blur(100px); Removed for performance */
    pointer-events: none;
    z-index: 0;
    will-change: transform;
    /* Hint for compositor */
}

.glow-1 {
    width: 600px;
    /* Increased size to compensate for lack of blur spread */
    height: 600px;
    background: radial-gradient(circle, rgba(0, 136, 204, 0.4) 0%, rgba(0, 136, 204, 0) 70%);
    top: -150px;
    right: -150px;
    animation: float 8s ease-in-out infinite;
}

.glow-2 {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(116, 204, 197, 0.45) 0%, rgba(116, 204, 197, 0) 70%);
    bottom: -150px;
    left: -150px;
    animation: float 8s ease-in-out infinite 2s;
}

@keyframes float {

    0%,
    100% {
        transform: translate3d(0, 0, 0);
    }

    50% {
        transform: translate3d(30px, 30px, 0);
    }
}

/* Loader animation from Uiverse.io by vikramsinghnegi */
.loader-spanne-20 {
    position: relative;
    width: 100px;
    height: 30px;
    padding: 0;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.loader-spanne-20>span {
    position: absolute;
    right: 0;
    width: 3px;
    height: 30px;
    background-color: var(--accent-color);
    display: block;
    border-radius: 3px;
    transform-origin: 50% 100%;
    animation: move 2.8s linear infinite;
}

.loader-spanne-20>span:nth-child(1) {
    animation-delay: -0.4s;
}

.loader-spanne-20>span:nth-child(2) {
    animation-delay: -0.8s;
}

.loader-spanne-20>span:nth-child(3) {
    animation-delay: -1.2s;
}

.loader-spanne-20>span:nth-child(4) {
    animation-delay: -1.6s;
}

.loader-spanne-20>span:nth-child(5) {
    animation-delay: -2s;
}

.loader-spanne-20>span:nth-child(6) {
    animation-delay: -2.4s;
}

.loader-spanne-20>span:nth-child(7) {
    animation-delay: -2.8s;
}

@keyframes move {
    0% {
        opacity: 0;
        transform: translateX(0px) rotate(0deg);
    }

    20% {
        opacity: 1;
    }

    40% {
        transform: translateX(-40px) rotate(0deg);
    }

    50% {
        opacity: 1;
        transform: translateX(-50px) rotate(22deg);
    }

    85% {
        opacity: 1;
        transform: translateX(-85px) rotate(60deg);
    }

    100% {
        opacity: 0;
        transform: translateX(-100px) rotate(65deg);
    }
}

/* Reduce animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    #snowfall {
        display: none;
    }
    
    .glow-1, .glow-2 {
        animation: none;
    }
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 40px 24px;
        /* No fixed margins needed with flex wrapper, just some spacing */
        margin: 0 20px;
        border-radius: 20px;
    }

    .title {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .telegram-button {
        padding: 14px 24px;
        font-size: 1rem;
    }

    .glow-1,
    .glow-2 {
        width: 250px;
        height: 250px;
    }

    /* Adjust TGS position on mobile */
    .tgs-container {
        width: 150px;
        height: 150px;
        min-width: 150px;
        min-height: 150px;
        margin-bottom: 15px;
    }

    .layout-wrapper {
        padding-top: 20px;
        /* Slight offset if needed */
        padding-bottom: 40px;
    }
}