:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent: #00a8ff;
    --accent-hover: #0090dd;
    --accent-glow: rgba(0, 168, 255, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    padding: 1.5rem 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(to bottom, var(--bg-primary), transparent);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent);
}

/* Language Switcher */
.lang {
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.lang select {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    font-size: 1rem;
    z-index: 2;
}

.lang svg {
    transition: all 0.3s ease;
}

.lang:hover svg path {
    fill: var(--accent);
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

/* Hero Section */
.hero {
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-primary svg {
    flex-shrink: 0;
}

/* Guarantee Section */
.guarantee {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 2rem 2.5rem;
    margin-bottom: 3rem;
    max-width: 800px;
}

.guarantee p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Tokens Section */
.tokens {
    margin-bottom: 2rem;
}

.tokens h2 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.payment-methods {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.payment-methods strong {
    color: var(--accent);
}

/* Footer */
.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1rem 1.5rem;
    }

    main {
        padding: 6rem 1.5rem 3rem;
    }

    .guarantee {
        padding: 1.5rem;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }

    .button-group {
        flex-direction: column;
        align-items: center;
    }

    .button-group .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

/* Subtle background effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 500px;
    background: radial-gradient(ellipse at center top, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}