:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --text-main: #202124;
    --text-subtle: #5f6368;
}

body {
    font-family: 'Inter', 'Apple SD Gothic Neo', Arial, sans-serif;
    background: var(--gray-50);
    margin: 0;
    padding: 0;
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
}

.header {
    background: #fff;
    padding: 1.5rem 2.5rem 1.5rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: none;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -1px;
}

.logo i {
    font-size: 1.75rem;
}

.header nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.header nav a {
    color: var(--text-subtle);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    transition: background 0.2s, color 0.2s;
}

.header nav a:hover, .header nav a.active {
    background: var(--gray-100);
    color: var(--primary);
}

.main-content {
    padding: 0;
    width: 100%;
    max-width: 100%;
    margin: 0 0 3rem 0;
    background: none;
    border-radius: 0;
    box-shadow: none;
    overflow-x: hidden;
}

.footer {
    background: #fff;
    text-align: center;
    padding: 1.5rem 0 1rem 0;
    color: var(--gray-700);
    font-size: 0.9rem;
    border-top: 1px solid var(--gray-200);
    margin-top: 3.5rem;
    box-shadow: none;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    margin: 0 0 0.5rem 0;
}

.social-links a {
    color: #b0b3b8;
    font-size: 1.3rem;
    transition: color 0.2s;
}

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

.footer-tagline {
    color: var(--gray-700);
    margin-top: 0.5rem;
}

.card {
    background: #fff;
    border-radius: 1.25rem;
    padding: 2.5rem 2rem;
    box-shadow: 0 2px 8px 0 rgb(60 64 67 / 8%);
    transition: box-shadow 0.2s, transform 0.2s;
    border: 1px solid var(--gray-200);
}

.card:hover {
    box-shadow: 0 4px 16px 0 rgb(60 64 67 / 12%);
    transform: translateY(-2px);
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    box-shadow: none;
}

.button:hover {
    background: var(--primary-dark);
}

.button-outline {
    background: #fff;
    border: 1.5px solid var(--primary);
    color: var(--primary);
}

.button-outline:hover {
    background: var(--primary);
    color: #fff;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    margin-left: auto;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    z-index: 1100;
}

@media (max-width: 900px) {
    .header {
        padding: 1rem 1.2rem;
    }
    .card {
        padding: 1.5rem 1rem;
    }
    .grid {
        gap: 1rem;
    }
    .menu-toggle {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        left: 0;
        height: 100vh;
        padding-top: 4.5rem;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        box-shadow: 0 2px 8px 0 rgb(60 64 67 / 8%);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
        z-index: 99;
        overflow-y: auto;
    }
    body.menu-open .main-nav {
        opacity: 1;
        pointer-events: auto;
    }
    .main-nav a {
        width: 100%;
        box-sizing: border-box;
        padding: 1rem 2rem;
        border-radius: 0;
        font-size: 1.1rem;
        border-bottom: 1px solid #f1f3f4;
        min-height: 3.5rem;
        display: flex;
        align-items: center;
    }
    .header {
        flex-direction: row;
        align-items: center;
        padding: 1rem 1rem 1rem 1rem;
        position: relative;
    }
}

@media (max-width: 600px) {
    .header {
        padding: 0.5rem 0.5rem 0.5rem 0.5rem;
    }
    .main-nav a {
        padding: 0.85rem 1.2rem;
        font-size: 1rem;
    }
}

body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
}