.demo-request-container {
    padding: 3rem 1.25rem;
    min-height: calc(100vh - 12rem);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background-color: #f4f7fa;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
}

.demo-request-card {
    width: 100%;
    max-width: 50rem;
    background-color: #ffffff;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 2.5rem;
}

.demo-request-header h1 {
    color: var(--secondary-color);
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    letter-spacing: -0.5px;
}

.demo-request-subtitle {
    color: #5a6c7d;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 2rem;
}

.demo-request-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.demo-request-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.demo-request-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.demo-request-field label,
.demo-request-grades legend {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.demo-request-required {
    color: #d63031;
    margin-left: 0.25rem;
}

.demo-request-field input[type="text"],
.demo-request-field input[type="email"],
.demo-request-field select,
.demo-request-field textarea {
    padding: 0.75rem 1rem;
    border: 1px solid #d0d7de;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--secondary-color);
    background-color: #ffffff;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.demo-request-field input:focus,
.demo-request-field select:focus,
.demo-request-field textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.demo-request-field textarea {
    resize: vertical;
    min-height: 6rem;
}

.demo-request-hint {
    color: #6c757d;
    font-size: 0.85rem;
}

.demo-request-field-error {
    color: #d63031;
    font-size: 0.85rem;
    min-height: 1rem;
}

.demo-request-input-error {
    border-color: #d63031 !important;
}

.demo-request-grades {
    border: none;
    margin: 0;
    padding: 0;
}

.demo-request-grades legend {
    margin-bottom: 0.5rem;
    padding: 0;
}

.demo-request-grade-option {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    border: 1px solid #d0d7de;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 400;
    background-color: #ffffff;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.demo-request-grade-option:hover {
    background-color: #f1f4f7;
}

.demo-request-grade-option input[type="checkbox"] {
    accent-color: var(--primary-color);
}

.demo-request-captcha {
    align-items: flex-start;
}

.demo-request-captcha-error {
    color: #d63031;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.demo-request-submit-btn {
    align-self: flex-start;
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    padding: 0.875rem 2.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.25);
    transition: background-color 0.15s ease, transform 0.15s ease;
    text-decoration: none;
    text-align: center;
}

.demo-request-submit-btn:hover {
    background-color: var(--hover-color);
    transform: translateY(-1px);
}

.demo-request-submit-btn:disabled {
    cursor: not-allowed;
    opacity: 0.75;
    transform: none;
}

.demo-request-validation-summary {
    color: #d63031;
    background-color: #fff5f5;
    border-left: 4px solid #d63031;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.95rem;
}

.demo-request-validation-summary ul {
    margin: 0;
    padding-left: 1.25rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.demo-request-submitted {
    text-align: center;
}

.demo-request-submitted-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
}

.demo-request-submitted h1 {
    color: var(--secondary-color);
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

.demo-request-submitted-message {
    color: #5a6c7d;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 2rem;
}

/* Tablet / Chromebook */
@media (max-width: 1024px) {
    .demo-request-card {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .demo-request-container {
        padding: 1.5rem 1rem;
    }
    .demo-request-card {
        padding: 1.5rem;
    }
    .demo-request-header h1 {
        font-size: 1.5rem;
    }
    .demo-request-row {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .demo-request-card {
        padding: 1.25rem;
    }
    .demo-request-submit-btn {
        width: 100%;
    }
}