main {
    display: flex;
    justify-content: center;
    padding: var(--space-lg);
}

.heading {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-md);
    width: 100%;
    max-width: 720px;

    background:
        linear-gradient(160deg, rgba(25, 25, 35, 0.92), rgba(42, 42, 49, 0.78)),
        radial-gradient(120% 120% at 0% 0%, rgba(79, 70, 229, 0.08), transparent);

    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--main-radius);

    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
}

/* Title refinement */
.heading h1 {
    font-size: var(--font-size-xl);
    color: var(--main-text);
    margin: 0;
    letter-spacing: 0.015em;
    line-height: 1.2;
}

form {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: var(--space-md) var(--space-lg);
    align-items: center;
}

/* Label refinement */
form label {
    grid-column: 1;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-sm);
}

form input,
form textarea,
form select {
    background:
        linear-gradient(180deg, rgba(50, 50, 62, 0.95), rgba(50, 50, 62, 0.85));

    border: 1px solid var(--input-border);
    border-radius: var(--main-radius);

    color: var(--main-text);
    padding: var(--space-sm) var(--space-md);

    font-family: var(--font-main);
    font-size: var(--font-size-base);

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.08s ease;

    grid-column: 2;
    width: 100%;
}

/* hover = subtle affordance */
form input:hover,
form textarea:hover,
form select:hover {
    border-color: var(--secondary-text);
}

/* focus = strong but clean */
form input:focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: var(--link-color);

    box-shadow:
        0 0 0 2px rgba(63, 167, 214, 0.18),
        0 2px 8px rgba(0, 0, 0, 0.25);

    transform: translateY(-1px);
}

form select {
    appearance: none;

    background-image:
        linear-gradient(45deg, transparent 50%, var(--secondary-text) 50%),
        linear-gradient(135deg, var(--secondary-text) 50%, transparent 50%);

    background-position:
        calc(100% - 18px) calc(50% - 2px),
        calc(100% - 12px) calc(50% - 2px);

    background-size: 6px 6px;
    background-repeat: no-repeat;

    padding-right: 40px;
}

form textarea {
    resize: none;
    min-height: 200px;
    line-height: 1.5;
}

.message-counter {
    margin: 0;
    grid-column: 2;
    color: var(--secondary-text);
    font-size: 13px;
    justify-self: end;

    transition: color 0.2s ease;
}

/* Checkbox styles */
form input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--link-color);
}

form input[type="checkbox"]:hover {
    border-color: var(--secondary-text);
}

form input[type="checkbox"]:focus {
    outline: none;
    box-shadow:
        0 0 0 2px rgba(63, 167, 214, 0.18),
        0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Checkbox label styling */
form label:has(input[type="checkbox"]) {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    gap: 0;
}

form label:has(input[type="checkbox"]) a {
    margin-left: 5px;
}

form button {
    background:
        linear-gradient(180deg, var(--button-background), #4338ca);

    color: var(--main-text);
    border: none;
    border-radius: var(--main-radius);

    padding: var(--space-sm) var(--space-md);

    font-size: var(--font-size-base);
    font-weight: 600;

    cursor: pointer;

    transition:
        background 0.2s ease,
        transform 0.12s ease,
        box-shadow 0.2s ease;

    grid-column: 1 / -1;
    justify-content: start;
    min-width: 140px;

    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
}

/* hover = lift */
form button:hover {
    background: var(--hover-background);
    transform: translateY(-1px);
}

/* focus-visible = accessibility */
form button:focus-visible {
    outline: none;
    box-shadow:
        0 0 0 2px rgba(63, 167, 214, 0.28),
        0 4px 14px rgba(79, 70, 229, 0.3);
}

/* active = press */
form button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

/* disabled */
form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
}

@media (max-width: 768px) {
    form {
        grid-template-columns: 1fr;
    }

    form label,
    form input,
    form select,
    form textarea,
    .message-counter,
    form button {
        grid-column: 1;
    }

    form label {
        flex-direction: column;
        align-items: flex-start;
    }

    form button {
        width: 100%;
    }
}