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

:root {
    --blue-dark: #1e3a5f;
    --blue: #2563eb;
    --blue-light: #dbeafe;
    --green: #16a34a;
    --red: #dc2626;
    --gray-50: #f8fafc;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-400: #9ca3af;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, .08);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* header  */
header {
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 100%);
    padding: 36px 24px 40px;
    text-align: center;
    color: #fff;
}

.header-logo {
    max-height: 52px;
    width: auto;
    margin-bottom: 16px;
    object-fit: contain;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -.3px;
}

header p {
    margin-top: 8px;
    color: rgba(255, 255, 255, .75);
    font-size: .95rem;
    max-width: 520px;
    margin-inline: auto;
    line-height: 1.6;
}

main {
    flex: 1;
    max-width: 680px;
    width: 100%;
    margin: -20px auto 48px;
    padding: 0 16px;
}

/* card */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 36px 40px;
}

@media (max-width: 600px) {
    .card {
        padding: 24px 20px;
    }

    header h1 {
        font-size: 1.5rem;
    }
}

/* info banner */
.info-banner {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 28px;
    font-size: .875rem;
    color: #1e40af;
    line-height: 1.5;
}

.info-banner .icon {
    font-size: 1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

/* formulario */
.form-group {
    margin-bottom: 22px;
}

label {
    display: block;
    font-size: .875rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 6px;
}

label .optional {
    font-weight: 400;
    color: var(--gray-400);
    font-size: .8rem;
    margin-left: 4px;
}

select,
textarea,
input[type="text"] {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-200);
    border-radius: 8px;
    font-size: .925rem;
    font-family: inherit;
    color: var(--gray-800);
    background: #fff;
    transition: border-color .2s, box-shadow .2s;
    outline: none;
}

select:focus,
textarea:focus,
input[type="text"]:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

.char-counter {
    text-align: right;
    font-size: .78rem;
    color: var(--gray-400);
    margin-top: 4px;
}

.char-counter.warn {
    color: #f59e0b;
}

.char-counter.over {
    color: var(--red);
}

.optional-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 480px) {
    .optional-grid {
        grid-template-columns: 1fr;
    }
}

.consent {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: var(--gray-50);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 24px;
    font-size: .85rem;
    color: var(--gray-600);
    line-height: 1.5;
    cursor: pointer;
}

.consent input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: var(--blue);
    flex-shrink: 0;
    margin-top: 1px;
    cursor: pointer;
}

/* botão */
.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--blue-dark), var(--blue));
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity .2s, transform .1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-submit:hover:not(:disabled) {
    opacity: .92;
}

.btn-submit:active:not(:disabled) {
    transform: scale(.99);
}

.btn-submit:disabled {
    opacity: .6;
    cursor: not-allowed;
}

/* toast */
.toast {
    display: none;
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 20px;
    font-size: .9rem;
    line-height: 1.5;
    align-items: flex-start;
    gap: 10px;
}

.toast.show {
    display: flex;
}

.toast.success {
    background: #f0fdf4;
    border: 1px solid #86efac;
    color: #15803d;
}

.toast.error {
    background: #fef2f2;
    border: 1px solid #fca5a5;
    color: var(--red);
}

/* tela de sucesso */
.success-screen {
    display: none;
    text-align: center;
    padding: 20px 0 8px;
}

.success-screen.show {
    display: block;
}

.success-icon {
    width: 72px;
    height: 72px;
    background: #f0fdf4;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 20px;
}

.success-screen h2 {
    font-size: 1.4rem;
    color: var(--green);
    margin-bottom: 10px;
}

.success-screen p {
    color: var(--gray-600);
    font-size: .9rem;
    line-height: 1.6;
    margin-bottom: 6px;
}

.protocol-box {
    display: inline-block;
    background: var(--gray-50);
    border: 1.5px dashed var(--gray-200);
    border-radius: 8px;
    padding: 10px 24px;
    margin: 16px 0 24px;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--blue-dark);
}

.btn-new {
    background: none;
    border: 1.5px solid var(--blue);
    color: var(--blue);
    padding: 10px 28px;
    border-radius: 8px;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s, color .2s;
}

.btn-new:hover {
    background: var(--blue);
    color: #fff;
}

/* footer */
footer {
    text-align: center;
    padding: 20px;
    font-size: .8rem;
    color: var(--gray-400);
}

footer strong {
    color: var(--gray-600);
}

/* spinner */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, .4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .7s linear infinite;
}