:root {
    --primary-blue: #2E3192;
    --secondary-blue: #1E5A9E;
    --cyan: #00B8D4;
    --light-cyan: #4DD0E1;
    --gradient: linear-gradient(135deg, #2E3192 0%, #1E5A9E 50%, #00B8D4 100%);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.2);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    width: 300px;
    height: auto;
    max-width: 80vw;
    animation: pulse 2s ease-in-out infinite;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.loading-spinner {
    margin-top: 30px;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: auto;
    margin-right: auto;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Main Content */
.main-content {
    opacity: 0;
    transition: opacity 0.5s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content.visible {
    opacity: 1;
}

.header {
    padding: 40px 20px;
    text-align: center;
}

.logo {
    width: 200px;
    height: auto;
    max-width: 80vw;
    filter: drop-shadow(0 5px 20px rgba(0, 0, 0, 0.2));
    animation: fadeInDown 0.8s ease;
}

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

.main {
    flex: 1;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.subtitle {
    font-size: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

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

.gateway-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.gateway-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    animation: fadeInScale 0.6s ease both;
}

.gateway-card:nth-child(1) {
    animation-delay: 0.4s;
}

.gateway-card:nth-child(2) {
    animation-delay: 0.5s;
}

.gateway-card:nth-child(3) {
    animation-delay: 0.6s;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.gateway-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.gateway-card:hover::before {
    left: 100%;
}

.gateway-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.card-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--light-cyan);
    transition: all 0.3s ease;
}

.gateway-card:hover .card-icon {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(10deg) scale(1.1);
}

.gateway-card:hover .card-icon svg {
    stroke: var(--text-primary);
}

.card-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-description {
    font-size: 1rem;
    color: var(--text-secondary);
}

.footer {
    padding: 30px 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1.2rem;
        margin-bottom: 40px;
    }

    .gateway-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .logo {
        width: 150px;
    }

    .loading-logo {
        width: 200px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .card-title {
        font-size: 1.5rem;
    }

    .gateway-card {
        padding: 30px 20px;
    }
}
