@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700;900&family=Noto+Sans+SC:wght@400;700;900&display=swap');

:root {
    --brand-primary: #0ea5e9;
    --brand-dark: #075985;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: #020617;
}

.cover-container {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 10;
}

/* Background Animation */
.bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, #0f172a 0%, #020617 100%);
    z-index: 1;
    overflow: hidden;
}

.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(50px);
    animation: moveGlow 20s infinite alternate;
}

@keyframes moveGlow {
    0% { transform: translate(-20%, -20%); }
    100% { transform: translate(20%, 20%); }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: clamp(1rem, 2vh, 2.5rem) clamp(1.5rem, 5vw, 5rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 1vw, 1.25rem);
    text-decoration: none;
    color: white;
}

.logo-img {
    height: clamp(2rem, 4vh, 3.5rem);
    width: auto;
}

.logo-text {
    font-size: clamp(1.25rem, 2.5vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: clamp(1rem, 3vw, 3.5rem);
    align-items: center;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .header {
        justify-content: center;
        padding: 1.5rem;
    }
}

.nav-link {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 600;
    font-size: clamp(0.875rem, 1.2vw, 1.125rem);
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
}

.nav-link:hover {
    color: white;
    transform: translateY(-2px);
    text-shadow: 0 0 20px rgba(14, 165, 233, 0.8);
}

.lang-toggle {
    padding: clamp(0.4rem, 1vh, 0.6rem) clamp(0.8rem, 1.5vw, 1.25rem);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.05);
    color: white;
    cursor: pointer;
    font-size: clamp(0.75rem, 1vw, 1rem);
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lang-toggle:hover {
    background: rgba(14, 165, 233, 0.2);
    border-color: rgba(14, 165, 233, 0.5);
    box-shadow: 0 0 15px rgba(14, 165, 233, 0.3);
}

/* Explore Button */
.explore-btn {
    margin-top: clamp(1.5rem, 5vh, 3rem);
    padding: clamp(0.75rem, 1.5vh, 1rem) clamp(2rem, 4vw, 3.5rem);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    border: none;
    border-radius: 99px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 25px -5px rgba(14, 165, 233, 0.4);
    animation: fadeInUp 1.8s ease-out;
}

.explore-btn:hover {
    transform: scale(1.05) translateY(-3px);
    box-shadow: 0 20px 35px -5px rgba(14, 165, 233, 0.6);
    background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 100%);
}

.explore-btn i {
    transition: transform 0.3s ease;
}

.explore-btn:hover i {
    transform: translateX(5px);
}

/* Enhanced Background */
.bg-grid-overlay {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(14, 165, 233, 0.1) 1px, transparent 1px);
    background-size: clamp(30px, 5vw, 50px) clamp(30px, 5vw, 50px);
    z-index: 2;
    opacity: 0.5;
}

/* Main Slogan */
.slogan-box {
    text-align: center;
    max-width: 90%;
    z-index: 20;
}

.slogan-title {
    font-size: clamp(2rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: clamp(1rem, 3vh, 2rem);
    background: linear-gradient(135deg, #fff 30%, #0ea5e9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.5));
    animation: fadeInUp 1.2s ease-out;
}

.slogan-subtitle {
    font-size: clamp(0.875rem, 2vw, 1.5rem);
    color: #94a3b8;
    font-weight: 300;
    letter-spacing: clamp(0.2rem, 0.5vw, 0.5rem);
    text-transform: uppercase;
    animation: fadeInUp 1.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: #64748b;
    animation: fadeIn 2s ease-in;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid #64748b;
    border-radius: 13px;
    position: relative;
}

.wheel {
    width: 2px;
    height: 6px;
    background-color: #64748b;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0% { opacity: 0; transform: translate(-50%, 0); }
    30% { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, 15px); }
}

.scroll-text {
    font-size: 0.75rem;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Transition Overlay */
.transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}

.transition-overlay.active {
    transform: translateY(0);
}

/* Particles Canvas */
#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
}