:root {
    --bg-color: #050505;
    --accent-color: #8b5cf6;
    --accent-glow: rgba(139, 92, 246, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    transition: --accent-color 1s ease, --accent-glow 1s ease;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Language Controls */
.lang-tr .en {
    display: none;
}

.lang-en .tr {
    display: none;
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.lang-switch button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.25rem 0.5rem;
}

.lang-switch button.active {
    color: var(--accent-color);
}

.lang-switch .separator {
    opacity: 0.3;
}

.about-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.about-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--accent-glow);
}

/* Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at center, #0f0f1d 0%, #050505 100%);
}

.bg-glow {
    position: fixed;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: -1;
    filter: blur(120px);
    opacity: 0.6;
    transition: background 1s ease;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 2.5rem;
    display: flex;
    justify-content: center;
    perspective: 1500px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 3.5rem 4rem;
    text-align: center;
    max-width: 700px;
    box-shadow: 0 40px 100px -20px rgba(0, 0, 0, 0.8),
        inset 0 0 20px rgba(255, 255, 255, 0.02);
    transition: transform 0.1s ease-out;
    transform-style: preserve-3d;
}

.logo-wrapper {
    margin-bottom: 2rem;
    animation: float 6s ease-in-out infinite;
    transform: translateZ(50px);
}

.logo {
    max-width: 160px;
    height: auto;
    filter: drop-shadow(0 0 20px var(--accent-glow));
    transition: filter 1s ease;
}

.title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
    transform: translateZ(30px);
}

.highlight {
    background: var(--accent-color);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 50%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    transition: all 1s ease;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2.5rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    transform: translateZ(20px);
}

/* Countdown */
.countdown {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    transform: translateZ(40px);
}

.countdown-item {
    display: flex;
    flex-direction: column;
    min-width: 70px;
}

.countdown-item span {
    font-family: 'Outfit', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.countdown-item label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    margin-top: 0.25rem;
}

/* Progress */
.progress-container {
    max-width: 320px;
    margin: 0 auto 2.5rem;
    transform: translateZ(25px);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-fill {
    height: 100%;
    width: 85%;
    background: linear-gradient(90deg, var(--accent-color), #d946ef);
    border-radius: 10px;
    box-shadow: 0 0 20px var(--accent-glow);
    animation: progressPulse 3s infinite;
    transition: background 1s ease, box-shadow 1s ease;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    transform: translateZ(45px);
}

.social-icon {
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.social-icon:hover {
    color: var(--accent-color);
    transform: scale(1.2) translateY(-3px);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.footer {
    border-top: 1px solid var(--glass-border);
    padding-top: 2rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.2);
    transform: translateZ(10px);
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    position: relative;
    max-width: 500px;
    width: 90%;
    padding: 3rem;
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Animations */
@keyframes float {

    0%,
    100% {
        transform: translateZ(50px) translateY(0);
    }

    50% {
        transform: translateZ(50px) translateY(-15px);
    }
}

@keyframes progressPulse {

    0%,
    100% {
        filter: brightness(1);
    }

    50% {
        filter: brightness(1.4);
    }
}

@media (max-width: 640px) {
    .top-nav {
        padding: 1.5rem;
    }

    .glass-card {
        padding: 3rem 1.5rem;
        margin: 1rem;
    }

    .title {
        font-size: 2rem;
    }

    .countdown {
        gap: 0.75rem;
    }

    .countdown-item span {
        font-size: 1.75rem;
    }
}