/* Base Styles & Variables */
:root {
    --bg-color: #0F0A1E;
    --primary-color: #8B5CF6;
    --primary-dark: #6D28D9;
    --primary-light: #A78BFA;
    --secondary-color: #F472B6;
    --text-color: #E2E8F0;
    --text-muted: #94A3B8;
    --glass-bg: rgba(15, 10, 30, 0.7);
    --glass-border: rgba(139, 92, 246, 0.2);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --border-radius: 12px;
    --border-color: rgba(148, 163, 184, 0.2);
    --box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --gradient: linear-gradient(135deg, #6366F1 0%, #A855F7 100%);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.main-container {
    position: relative;
    z-index: 1;
}

/* Snowfall Effects */
.snowfall-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.main-snow {
    position: fixed;
    z-index: 1;
}

.section-snow {
    z-index: 0;
    height: 100%;
}

.modal-snow {
    z-index: 1001;
    opacity: 0.5;
}

.footer-snow {
    height: 100%;
    opacity: 0.7;
}

.snowflake {
    position: absolute;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    opacity: 0.2;
    pointer-events: none;
    animation: snowfall linear infinite;
}

.section-snow .snowflake {
    opacity: 0.15;
}

.modal-snow .snowflake {
    opacity: 0.1;
}

.footer-snow .snowflake {
    opacity: 0.15;
}

@keyframes snowfall {
    0% {
        transform: translateY(-10vh) rotate(0deg);
        opacity: 0;
    }
    20% {
        opacity: 0.2;
    }
    90% {
        opacity: 0.2;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 10%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-medium);
}

header.scrolled {
    padding: 1rem 10%;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.logo-icon {
    margin-right: 0.5rem;
    font-size: 1.8rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu {
    display: flex;
    gap: 1.5rem;
}

.menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.menu a:hover {
    color: var(--primary-light);
    background: rgba(139, 92, 246, 0.1);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10% 5%;
    background: radial-gradient(circle at center, var(--bg-color) 0%, rgba(15, 10, 30, 0.95) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, rgba(247, 114, 182, 0.05) 50%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    padding: 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--card-shadow);
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.hero-buttons .btn {
    min-width: 180px;
    padding: 1rem 1.8rem;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.hero-buttons .btn i {
    font-size: 1.2rem;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-medium);
    text-align: center;
    border: none;
    font-size: 1rem;
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.btn.primary:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
    transform: translateY(-2px);
}

.btn.secondary {
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary-light);
    border: 1px solid var(--primary-color);
}

.btn.secondary:hover {
    background: rgba(139, 92, 246, 0.2);
}

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

.btn.outline:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
    background: rgba(139, 92, 246, 0.1);
}

/* Pricing Section */
.pricing-section {
    position: relative;
    overflow: hidden;
    padding: 6rem 5%;
}

.section-header {
    position: relative;
    z-index: 2;
    text-align: center;
    margin-bottom: 3rem;
    background: var(--glass-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.section-header h2 {
    color: var(--primary-light);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.card-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 2rem;
    width: 300px;
    transition: var(--transition-medium);
    position: relative;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(247, 114, 182, 0.05) 100%);
    z-index: -1;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

.card.featured {
    border: 1px solid var(--primary-light);
    background: var(--glass-bg);
    transform: scale(1.05);
}

.card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.card-highlight {
    position: absolute;
    top: 10px;
    right: 10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 600;
}

.card-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 0.25rem;
}

.duration {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.card-body {
    flex: 1;
    margin-bottom: 1.5rem;
}

.card-body ul {
    list-style: none;
}

.card-body li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
}

.card-body li i {
    color: var(--primary-light);
    margin-right: 0.5rem;
}

.card-footer {
    text-align: center;
}

.other-payment {
    text-align: center;
    margin-top: 2rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 10, 30, 0.9);
    z-index: 1000;
    overflow: auto;
    animation: fadeIn 0.3s;
}

.modal-content {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 500px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--glass-border);
    animation: slideIn 0.3s;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--primary-light);
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.qr-wrapper {
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(15, 10, 30, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#qrPlaceholder {
    color: var(--text-muted);
    padding: 2rem;
}

.loader {
    display: none;
    border: 4px solid rgba(139, 92, 246, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#timer {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.confirmation-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1100;
    min-width: 300px;
    max-width: 400px;
}

.notification-content {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--card-shadow);
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
}

.notification-content i {
    color: var(--primary-light);
    margin-right: 0.75rem;
    font-size: 1.2rem;
}

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

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s;
}

/* Footer */
footer {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 3rem 5% 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 1rem 5%;
        flex-direction: column;
        gap: 1rem;
    }
    
    header.scrolled {
        padding: 0.75rem 5%;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .modal-content {
        margin: 20% auto;
        padding: 1.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .card-container {
        gap: 1.5rem;
    }
    
    .card.featured {
        transform: none;
        border-color: var(--primary-light);
    }
    
    .card.featured:hover {
        transform: translateY(-10px);
    }
    
    .footer-social a {
        background: rgba(139, 92, 246, 0.1);
        color: var(--primary-light);
    }
    
    .footer-social a:hover {
        background: rgba(139, 92, 246, 0.2);
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        padding: 0 1rem;
    }
    
    .hero-buttons .btn {
        width: 100%;
        margin: 0;
    }
}

/* Shine Animation */
.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to right,
        rgba(139, 92, 246, 0) 0%,
        rgba(139, 92, 246, 0.05) 50%,
        rgba(139, 92, 246, 0) 100%
    );
    transform: rotate(30deg);
    animation: shine 6s infinite;
    pointer-events: none;
}

@keyframes shine {
    0% { transform: translateX(-100%) rotate(30deg); }
    100% { transform: translateX(100%) rotate(30deg); }
}

/* Amount Display */
.amount-display {
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary-light);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    font-weight: 600;
    border: 1px solid var(--glass-border);
}

/* QR Code Styles */
#qrCode {
    margin: 1rem auto;
    background: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    display: inline-block;
    box-shadow: var(--card-shadow);
}

#qrCode img {
    display: block;
}

#downloadQR {
    margin-top: 1rem;
}