@import url("global.css");
main {
    flex: 1 0 auto;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2dvh 4dvw 4rem;
    min-height: 80dvh;

    .intro-title {
        h1 {
            text-align: center;
            margin: 1.25rem 0 0.25rem;
            font-weight: var(--font-weight-bold, 700);
            animation: fadeInUp 0.6s ease-out both;
        }

        p {
            text-align: center;
            margin: 0 0 1.25rem;
            color: color-mix(in oklab, var(--text-color, #222) 80%, white);
            animation: fadeInUp 0.6s ease-out both 0.12s;
        }
    }
}

#contact-form {
    display: grid;
    place-items: center;
    margin-top: 0.75rem;

    .contact-card {
        width: min(720px, 92dvw);
        background: color-mix(in oklab, var(--body-background-color) 90%, #ffffff);
        border: 1px solid color-mix(in oklab, var(--text-color) 12%, #e5e9ef);
        border-radius: 12px;
        box-shadow: 0 1px 0 rgba(0,0,0,0.06);
        padding: 1.25rem 1.25rem 1.5rem;
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.75rem;

        opacity: 0;
        animation: fadeInUp 0.55s ease-out forwards;

        & > legend {
            text-align: center;
            font-weight: var(--font-weight-bold, 700);
            font-size: clamp(1.1rem, 1.6vw, 1.25rem);
            margin-bottom: 0.25rem;
        }

        input, textarea {
            font: inherit;
            color: var(--text-color, #222);
            background: color-mix(in oklab, var(--body-background-color) 94%, #ffffff);
            border: 1.5px solid color-mix(in oklab, var(--text-color) 18%, #dfe5eb);
            border-radius: 8px;
            padding: 0.7rem 0.85rem;
            outline: none;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
    }

    button {
        margin-top: 0.5rem;
        justify-self: center;
        font-family: var(--font-theme);
        font-weight: 600;
        letter-spacing: .02em;
        padding: .65em 1.25em;
        border: 2px solid var(--button-color, #333);
        border-radius: 8px;
        background: transparent;
        color: var(--button-color, #333);
        transition: background-color .25s ease, color .25s ease, transform .15s ease, opacity .2s ease;
        cursor: pointer;
    }
    
    &:has(:invalid) button {
        opacity: .45;
        cursor: not-allowed;
        pointer-events: none;
        user-select: none;
    }

    &:has(:valid:not(:placeholder-shown)) button:hover {    
        background-color: var(--button-color);
        color: var(--body-background-color);
        transform: translateY(-2px);
    }

    &:has(:valid:not(:placeholder-shown)) button:active {
        transform: translateY(0);
    }

    /* Focus border */
    & :is(input, textarea):focus-visible {
        border-color: var(--accent-color, #0077cc);
        box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent-color, #0077cc) 40%, #ffffff);
    }

    & :is(input, textarea) {
        
        /* Valid input border (green) */
        &:user-valid, &:valid:not(:placeholder-shown) {
            border-color: green;
            box-shadow: 0 0 0 3px rgba(46,125,50,0.12);
        }

        /* Invalid input border (red) */
        &:user-invalid, &:invalid:not(:focus):not(:placeholder-shown) {
            border-color: red;
            box-shadow: 0 0 0 3px rgba(220,77,65,0.12);
        }
    }
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        
        
        nav ul {
            flex-direction: column;
            gap: 0.6rem;
            width: 100%;
            
            a {
                font-size: 1.05rem;
                display: block;
                
                &.active::after {
                    width: 100%;
                    opacity: 1;
                }
            }
        }
    }

    .contact-card { 
        padding: 1rem; 
    }

    *, *::before, *::after { 
        box-sizing: border-box; 
    }
}