:root {
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --accent-green: #52d824;
    --accent-green-hover: #45c01d;
    --text-main: #f5f5f5;
    --text-muted: #999999;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Background Glow Effects */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(82,216,36,0.15) 0%, rgba(10,10,10,0) 70%);
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
}

.glow-1 {
    top: -200px;
    left: -200px;
}

.glow-2 {
    bottom: 20%;
    right: -200px;
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent-green);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background-color: var(--accent-green-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

.btn-outline:hover {
    background-color: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.2);
}

.btn-block {
    display: block;
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    border-radius: var(--radius-md);
}

.btn-glow {
    box-shadow: 0 0 15px rgba(82,216,36,0.4);
}

.btn-glow:hover {
    box-shadow: 0 0 25px rgba(82,216,36,0.6);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    padding: 16px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-main);
}

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

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

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
}

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

.nav-auth {
    display: flex;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 160px 0 60px;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 24px;
}

.hero-content h1 span {
    color: var(--accent-green);
}

.hero-content p {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Order Section & Glass Card */
.order-section {
    position: relative;
    z-index: 10;
    margin-top: 20px;
    margin-bottom: 80px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.tabs-container {
    display: flex;
    overflow-x: auto;
    background: rgba(0,0,0,0.3);
    border-bottom: 1px solid var(--glass-border);
    padding: 0 12px;
}

.tabs-container::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--accent-green);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--accent-green);
    border-radius: 3px 3px 0 0;
    box-shadow: 0 -2px 10px rgba(82,216,36,0.5);
}

.form-container {
    padding: 32px;
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}

/* Inputs */
.input-wrapper {
    position: relative;
}

input[type="text"], select {
    width: 100%;
    background: rgba(0,0,0,0.4);
    border: 1px solid var(--glass-border);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 16px;
    transition: var(--transition);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

select {
    cursor: pointer;
}

input[type="text"]:focus, select:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(82,216,36,0.1);
}

.provider-icon {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Nominal Grid */
.nominal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}

.nominal-card {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.nominal-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-main);
}

.nominal-card p {
    font-size: 13px;
    color: var(--text-muted);
}

.nominal-card:hover {
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
    background: rgba(255,255,255,0.05);
}

.nominal-card.selected {
    border-color: var(--accent-green);
    background: rgba(82,216,36,0.05);
}

.nominal-card.selected h4 {
    color: var(--accent-green);
}

/* Checkout Footer */
.checkout-footer {
    display: flex;
    gap: 24px;
    align-items: flex-end;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px dashed var(--glass-border);
}

.payment-group {
    flex: 1;
    margin-bottom: 0;
}

.total-group {
    width: 300px;
}

.total-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.total-price {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 16px;
}

/* Promo Section */
.promo-section {
    padding: 60px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
}

.view-all {
    color: var(--accent-green);
    font-size: 14px;
    font-weight: 500;
}

.promo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.promo-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
}

.promo-image {
    height: 180px;
    padding: 24px;
    display: flex;
    align-items: flex-end;
}

.promo-image h3 {
    font-size: 20px;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.bg-grad-1 { background: linear-gradient(135deg, #11998e, #38ef7d); }
.bg-grad-2 { background: linear-gradient(135deg, #8E2DE2, #4A00E0); }
.bg-grad-3 { background: linear-gradient(135deg, #FF416C, #FF4B2B); }

/* Benefits Section */
.benefits-section {
    padding: 60px 0 100px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: center;
}

.benefit-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 40px 24px;
    border-radius: var(--radius-lg);
}

.icon-box {
    width: 64px;
    height: 64px;
    background: rgba(82,216,36,0.1);
    color: var(--accent-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin: 0 auto 20px;
}

.benefit-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.benefit-item p {
    color: var(--text-muted);
    font-size: 14px;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 60px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand h2 {
    font-size: 24px;
    margin-bottom: 16px;
}

.footer-brand span {
    color: var(--accent-green);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--accent-green);
    color: var(--bg-dark);
}

.footer-links {
    display: flex;
    gap: 80px;
}

.link-group h3 {
    font-size: 16px;
    margin-bottom: 20px;
}

.link-group a {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 12px;
    transition: var(--transition);
}

.link-group a:hover {
    color: var(--accent-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.05);
    color: var(--text-muted);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .checkout-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .total-group {
        width: 100%;
    }
    
    .promo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-links {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-auth {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .form-container {
        padding: 24px 16px;
    }
    
    .promo-grid, .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
}