:root {
    --bg: #EDF2F0;
    --neu-1: #ecf0f3;
    --neu-2: #d1d9e6;
    --white: #f9f9f9;
    --gray: #a0a5a8;
    --black: #181818;
    --purple: #4B70E2;
    --transition: 0.3s;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--gray);
    background-color: var(--neu-1);
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    background-color: var(--neu-1);
    box-shadow: 6px 6px 12px var(--neu-2), -6px -6px 12px var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    margin: -20px -20px 30px -20px;
    border-radius: 0 0 20px 20px;
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 2rem;
}

.nav-brand {
    color: var(--purple);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px var(--neu-2), -2px -2px 4px var(--white);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    color: var(--black);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 50px;
    transition: all 0.3s ease;
    display: block;
    background-color: var(--neu-1);
    box-shadow: 
        5px 5px 10px var(--neu-2), 
        -5px -5px 10px var(--white);
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.nav-menu a:hover {
    color: var(--purple);
    transform: translateY(-2px);
    box-shadow: 
        7px 7px 14px var(--neu-2), 
        -7px -7px 14px var(--white);
}

.nav-menu a:active {
    color: var(--purple);
    transform: translateY(1px);
    box-shadow: 
        inset 3px 3px 6px var(--neu-2), 
        inset -3px -3px 6px var(--white);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.5s;
}

.nav-menu a:hover::after {
    left: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    border-radius: 8px;
    box-shadow: 4px 4px 8px var(--neu-2), -4px -4px 8px var(--white);
}

.hamburger:active {
    box-shadow: inset 2px 2px 4px var(--neu-2), inset -2px -2px 4px var(--white);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--purple);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

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

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

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

header {
    background: var(--neu-1);
    color: var(--gray);
    text-align: center;
    padding: 3rem 2rem;
    margin-bottom: 2rem;
    border-radius: 20px;
    box-shadow: 10px 10px 20px var(--neu-2), -10px -10px 20px var(--white);
    border: none;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--black);
}

header p {
    font-size: 1.1rem;
    color: var(--gray);
    font-weight: 500;
}

.content-wrapper {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.sidebar {
    flex: 0 0 350px;
}

main {
    flex: 1;
}

.card {
    background: var(--neu-1);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 10px 10px 20px var(--neu-2), -10px -10px 20px var(--white);
    height: 100%;
    border: none;
}

.card h2 {
    color: var(--black);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    padding-bottom: 0.5rem;
    position: relative;
    border-bottom: none;
}

.card h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background-color: var(--purple);
    border-radius: 2px;
}

main ul {
    list-style: none;
}

main li {
    margin-bottom: 1rem;
}

main a {
    display: block;
    padding: 15px 20px 15px 60px;
    background-repeat: no-repeat;
    background-position: 15px center;
    background-size: 32px 32px;
    color: var(--black);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.2s ease;
    background-color: var(--neu-1);
    box-shadow: 6px 6px 12px var(--neu-2), -6px -6px 12px var(--white);
    font-weight: 600;
    border: none;
}

main li:nth-child(1) a {
    background-image: url("../images/icons8.gif");
}

main li:nth-child(2) a {
    background-image: url("../images/icons8.gif");
}

main li:nth-child(3) a {
    background-image: url("../images/icons8.gif");
}

main li:nth-child(4) a {
    background-image: url("../images/icons8.gif");
}

main a:hover {
    color: var(--purple);
    box-shadow: inset 4px 4px 8px var(--neu-2), inset -4px -4px 8px var(--white);
    transform: translateY(1px);
    background-color: var(--neu-1);
}

dl {
    margin-bottom: 1rem;
}

dt {
    font-weight: 700;
    color: var(--black);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    padding-left: 1rem;
    border-left: 4px solid var(--purple);
}

dd {
    margin-left: 0;
    margin-bottom: 0.8rem;
    color: color-mix(in srgb, var(--black), white 40%);
    font-family: 'Montserrat', monospace;
    background-color: var(--neu-1);
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    display: block;
    box-shadow: inset 3px 3px 6px var(--neu-2), inset -3px -3px 6px var(--white);
    font-weight: 500;
    border: none;
}

footer {
    background: var(--neu-1);
    color: var(--gray);
    text-align: center;
    padding: 2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    box-shadow: 10px 10px 20px var(--neu-2), -10px -10px 20px var(--white);
    margin-top: 2rem;
    border: none;
}

footer p {
    margin: 0;
    line-height: 1.6;
}

footer a {
    color: var(--purple);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--black);
    text-decoration: none;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .navbar {
        margin: -10px -10px 20px -10px;
        border-radius: 0 0 15px 15px;
    }

    .nav-container {
        padding: 0.5rem 1.5rem;
        flex-wrap: wrap;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-in-out;
        gap: 1rem;
        margin-top: 0;
        padding: 0 0.5rem;
    }

    .nav-menu.active {
        max-height: 500px;
        margin-top: 1.5rem;
        padding-bottom: 1rem;
    }

    .nav-menu li {
        width: 100%;
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }

    .nav-menu.active li {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-menu.active li:nth-child(1) { transition-delay: 0.1s; }
    .nav-menu.active li:nth-child(2) { transition-delay: 0.15s; }
    .nav-menu.active li:nth-child(3) { transition-delay: 0.2s; }
    .nav-menu.active li:nth-child(4) { transition-delay: 0.25s; }
    .nav-menu.active li:nth-child(5) { transition-delay: 0.3s; }

    .nav-menu a {
        padding: 1rem;
        width: 100%;
        text-align: center;
    }

    header {
        padding: 2rem 1rem;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .content-wrapper {
        flex-direction: column;
        gap: 1.5rem;
    }

    .sidebar {
        flex: 1;
    }

    .card {
        padding: 1.5rem;
    }

    footer {
        font-size: 0.8rem;
        padding: 1.5rem;
    }
}