:root {
    --primary-color: #00C26F;
    --secondary-color: #2B2B35;
    --dark-bg: #1a1a24;
    --darker-bg: #0f0f18;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --gradient-start: #00C26F;
    --gradient-end: #00ff9d;
    --card-bg: #232330;
    --border-color: #3a3a4a;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--darker-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 15, 24, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.logo a {
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    font-size: 15px;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 100px 0 60px;
    text-align: center;
    background: radial-gradient(ellipse at top, rgba(0, 194, 111, 0.1) 0%, transparent 60%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    display: block;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

/* Exchange Widget Section */
.exchange-section {
    padding: 40px 0 80px;
}

.widget-container {
    max-width: 500px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 24px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--dark-bg);
}

.section-title {
    text-align: center;
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--card-bg);
    padding: 36px 28px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 194, 111, 0.15);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 194, 111, 0.1), rgba(0, 255, 157, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary-color);
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
    text-align: center;
    background: var(--card-bg);
    padding: 40px 28px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.step-number {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 24px;
}

.step-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-description {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.step-arrow {
    font-size: 36px;
    color: var(--primary-color);
    font-weight: 300;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.footer-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========== MOBILE SUPPORT: detect mobile and adjust proportions ========== */
@media (max-width: 968px) {
    .hero-title {
        font-size: 48px;
    }

    .section-title {
        font-size: 36px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .header-content {
        flex-wrap: wrap;
        gap: 16px;
    }

    .nav {
        gap: 20px;
    }

    .nav-link {
        font-size: 15px;
    }

    .hero {
        padding: 60px 0 48px;
    }

    .hero-title {
        font-size: 48px;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 18px;
        margin-bottom: 32px;
    }

    .section-title {
        font-size: 36px;
        margin-bottom: 40px;
    }

    .widget-container {
        padding: 16px;
        border-radius: 16px;
    }

    .exchange-section {
        padding: 32px 0 60px;
    }

    .features {
        padding: 60px 0;
    }

    .features-grid {
        gap: 24px;
    }

    .feature-card {
        padding: 28px 22px;
    }

    .how-it-works {
        padding: 60px 0;
    }

    .steps {
        margin-top: 40px;
        gap: 24px;
    }

    .step {
        min-width: 100%;
        max-width: 100%;
    }

    .footer {
        padding: 48px 0 24px;
        margin-top: 60px;
    }

    .footer-content {
        gap: 36px;
        margin-bottom: 36px;
    }
}

@media (max-width: 640px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
        padding: 16px 0;
    }

    .nav {
        gap: 20px;
    }

    .container {
        padding: 0 16px;
    }

    .logo-text {
        font-size: 24px;
    }

    .hero {
        padding: 48px 0 40px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 32px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .feature-card {
        padding: 24px 20px;
    }

    .feature-title {
        font-size: 20px;
    }
}

html {
    scroll-behavior: smooth;
}