:root {
    --color-primary: #1C244B;
    --color-primary-light: #2A3A6B;

    --color-white: #ffffff;
    --color-black: #1a1a1a;
    --color-dark: #1C244B;
    --color-gray-900: #2d3748;
    --color-gray-700: #4a5568;
    --color-gray-600: #718096;
    --color-gray-400: #a0aec0;
    --color-gray-200: #e2e8f0;
    --color-gray-100: #f8f9fa;

    --color-white-95: rgba(255, 255, 255, 0.95);
    --color-white-90: rgba(255, 255, 255, 0.9);
    --color-white-85: rgba(255, 255, 255, 0.85);
    --color-white-80: rgba(255, 255, 255, 0.8);
    --color-white-60: rgba(255, 255, 255, 0.6);
    --color-white-10: rgba(255, 255, 255, 0.1);
    --color-white-05: rgba(255, 255, 255, 0.05);
    --color-black-08: rgba(0, 0, 0, 0.08);
    --color-black-05: rgba(0, 0, 0, 0.05);
    --color-primary-30: rgba(28, 36, 75, 0.3);

    --gradient-primary: linear-gradient(135deg, #1C244B 0%, #2A3A6B 100%);
    --gradient-primary-90: linear-gradient(90deg, #1C244B, #2A3A6B);
    --gradient-bg: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    --gradient-bg-reverse: linear-gradient(90deg, #f8f9fa 0%, #ffffff 100%);
}

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

body {
    background: var(--color-gray-100);
    color: var(--color-dark);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

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

h1, h2, h3 {
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* NAVIGATION */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: transparent;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    box-shadow: none;
    transition: all 0.3s ease;
}

nav.scrolled {
    background: var(--color-white-95);
    border-bottom: 1px solid var(--color-black-08);
    box-shadow: 0 2px 10px var(--color-black-05);
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    width: auto;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    transition: all 0.3s ease;
}

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--color-gray-900);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    gap: 40px;
    list-style: none;
}

nav a {
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    color: var(--color-gray-900);
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary-90);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

.portal-link {
    font-size: 28px;
    color: var(--color-gray-900);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    margin-left: 20px;
}

.portal-link:hover {
    color: var(--color-primary);
    transform: scale(1.1);
}

.portal-link::after {
    display: none;
}

/* FOOTER */
footer {
    padding: 60px 60px 40px;
    background: var(--color-dark);
    border-top: none;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 18px;
    color: var(--color-white);
}

.footer-section p, .footer-section a {
    color: var(--color-gray-400);
    margin-bottom: 10px;
    display: block;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-white-10);
    color: var(--color-gray-400);
    font-size: 14px;
}

/* ANIMATIONS */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    nav {
        padding: 15px 30px;
    }

    /* Show hamburger menu on mobile */
    .menu-toggle {
        display: flex;
    }

    /* Mobile Navigation Menu */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 30px;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        opacity: 0;
        transform: translateX(30px);
        animation: none;
    }

    .nav-menu.active li {
        animation: slideInRight 0.5s ease forwards;
    }

    .nav-menu.active li:nth-child(1) {
        animation-delay: 0.1s;
    }

    .nav-menu.active li:nth-child(2) {
        animation-delay: 0.2s;
    }

    .nav-menu.active li:nth-child(3) {
        animation-delay: 0.3s;
    }

    .nav-menu.active li:nth-child(4) {
        animation-delay: 0.4s;
    }

    .nav-menu a {
        font-size: 20px;
        font-weight: 600;
        color: var(--color-dark);
        display: block;
        padding: 10px 0;
    }

    .nav-menu a::after {
        display: none;
    }

    .portal-link {
        position: fixed;
        top: 20px;
        right: 80px;
        font-size: 32px;
        z-index: 1001;
    }

    /* Overlay when menu is open */
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0);
        backdrop-filter: blur(0px);
        opacity: 0;
        pointer-events: none;
        transition: all 0.4s ease;
        z-index: 999;
    }

    body.menu-open::before {
        opacity: 1;
        backdrop-filter: blur(5px);
        background: rgba(0, 0, 0, 0.3);
        pointer-events: all;
    }

    body.menu-open {
        overflow: hidden;
    }
}