:root {
    --tinta: #123B5D;
    --tinta-claro: #2A3270;
    --papel: #FBFAF7;
    --grafite: #31373D;
    --cinza: #6B7280;
    --linha: #DDD8CE;
    --ouro: #CD0862;
    --ouro-claro: #FFF8DC;
    --verde: #2F7D4F;
    --vermelho: #B3402E;
    --branco: #FFFFFF;
    --ciano: #3EC6D0;
}

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

html {
    scroll-behavior: smooth
}

body {
    font-family: 'IBM Plex Sans', sans-serif;
    background: var(--papel);
    color: var(--grafite);
    line-height: 1.6;
    font-size: 16px
}

h1,
h2,
h3 {
    font-family: 'IBM Plex Serif', serif;
    color: var(--tinta)
}

.mono {
    font-family: 'IBM Plex Mono', monospace
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px
}

/* ---------- CABEÇALHO PADRONIZADO ---------- */
header {
    background: var(--tinta);
    color: var(--branco);
    padding: 64px 0 56px;
    position: relative;
    overflow: hidden
}

header::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 5px;
    background: var(--ouro)
}

header h1 {
    color: var(--branco);
    font-size: clamp(30px, 5vw, 46px);
    line-height: 1.15;
    font-weight: 700;
    max-width: 720px
}

header .sub {
    margin-top: 12px;
    font-size: 17px;
    color: #C9D4E2;
    max-width: 640px
}

.issn {
    display: inline-block;
    margin-top: 16px;
    border: 2px solid var(--ouro);
    color: var(--ouro);
    padding: 4px 14px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    letter-spacing: .08em;
    border-radius: 4px
}

.datas-topo {
    margin-top: 28px;
    display: flex;
    gap: 28px;
    flex-wrap: wrap
}

.datas-topo div {
    border-left: 3px solid var(--ouro);
    padding-left: 12px
}

.datas-topo .rotulo {
    font-size: 12px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: #9DB0C6
}

.datas-topo .valor {
    font-family: 'IBM Plex Serif', serif;
    font-size: 19px;
    font-weight: 600;
    color: var(--branco)
}

/* ---------- NAVEGAÇÃO PADRONIZADA ---------- */
nav {
    background: var(--branco);
    border-bottom: 1px solid var(--linha);
    position: sticky;
    top: 0;
    z-index: 50
}

nav .container {
    display: flex;
    gap: 4px;
    overflow-x: auto
}

nav a {
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--grafite);
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 2px solid transparent
}

nav a:hover,
nav a:focus-visible {
    color: var(--tinta);
    border-bottom-color: var(--ouro);
    outline: none
}

/* ---------- SEÇÕES ---------- */
section {
    padding: 56px 0
}

section+section {
    border-top: 1px solid var(--linha)
}

h2 {
    font-size: 27px;
    margin-bottom: 8px
}

.h2-sub {
    color: var(--cinza);
    margin-bottom: 28px;
    max-width: 640px
}

/* ---------- CATEGORIAS ---------- */
.cat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    max-width: 640px
}

.cat-card {
    border: 2px solid var(--ouro);
    border-radius: 8px;
    padding: 18px
}

.cat-card h3 {
    color: var(--ouro);
    font-size: 18px;
    margin-bottom: 6px
}

.cat-card p {
    font-size: 14px;
    color: var(--cinza)
}
.cronograma {
    list-style:none;max-width:640px
}
.cronograma li {
    display:flex;gap:18px;padding:13px 0;border-bottom:1px dashed var(--linha);align-items:baseline
}
.cronograma .data {
    font-family:'IBM Plex Mono',monospace;font-size:14px;font-weight:500;color:var(--tinta);min-width:150px
}
.cronograma .destaque .data,.cronograma .destaque .etapa{
    color:var(--ouro);font-weight:600
}
/* ---------- ÁREAS TEMÁTICAS ---------- */
.areas-list {
    list-style: none;
    max-width: 640px
}

.areas-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--linha);
    display: flex;
    gap: 12px;
    align-items: baseline
}

.areas-list .num {
    font-family: 'IBM Plex Serif', serif;
    font-size: 22px;
    font-weight: 600;
    color: var(--ouro);
    min-width: 32px
}

/* ---------- FORMULÁRIOS ---------- */
.card {
    background: var(--branco);
    border: 1px solid var(--linha);
    border-radius: 8px;
    padding: 32px;
    max-width: 720px
}

label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--tinta);
    margin: 18px 0 6px
}

input[type=text],
input[type=email],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--linha);
    border-radius: 6px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 15px;
    background: var(--papel);
    color: var(--grafite)
}

input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--tinta-claro);
    outline-offset: 1px;
    border-color: var(--tinta-claro)
}

textarea {
    min-height: 120px;
    resize: vertical
}

.hint {
    font-size: 13px;
    color: var(--cinza);
    margin-top: 4px
}

.autor-bloco {
    border: 1px dashed var(--linha);
    border-radius: 6px;
    padding: 14px 16px 18px;
    margin-top: 10px;
    position: relative
}

.autor-bloco .tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--ouro);
    text-transform: uppercase;
    letter-spacing: .08em
}

.remover-autor {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    color: var(--vermelho);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit
}

.botao {
    display: inline-block;
    background: var(--tinta);
    color: var(--branco);
    border: none;
    border-radius: 6px;
    padding: 13px 26px;
    font-size: 15px;
    font-weight: 600;
    font-family: 'IBM Plex Sans', sans-serif;
    cursor: pointer;
    margin-top: 24px
}

.botao:hover {
    background: var(--tinta-claro)
}

.botao:focus-visible {
    outline: 3px solid var(--ouro);
    outline-offset: 2px
}

.botao[disabled] {
    opacity: .55;
    cursor: wait
}

.botao-sec {
    background: none;
    border: 1px solid var(--tinta);
    color: var(--tinta);
    border-radius: 6px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    margin-top: 12px
}

.botao-sec:hover {
    background: var(--ouro-claro)
}

.msg-ok {
    background: #E8F3EC;
    border-left: 3px solid var(--verde);
    padding: 16px;
    border-radius: 0 6px 6px 0;
    margin-top: 20px
}

.msg-erro {
    background: #FBEAE6;
    border-left: 3px solid var(--vermelho);
    padding: 16px;
    border-radius: 0 6px 6px 0;
    margin-top: 20px;
    font-size: 14px
}

.msg-ok .id {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 22px;
    font-weight: 600;
    color: var(--tinta);
    display: block;
    margin: 6px 0
}

.check-linha {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-top: 18px;
    font-size: 14px
}

.check-linha input {
    margin-top: 4px
}

.download-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--tinta);
    color: var(--branco);
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    margin-top: 12px
}

.download-link:hover {
    opacity: .9
}

/* ---------- RODAPÉ PADRONIZADO ---------- */
footer {
    background: var(--tinta);
    color: #9DB0C6;
    padding: 36px 0;
    font-size: 14px;
    margin-top: 40px
}

footer strong {
    color: var(--branco)
}

@media(max-width:640px) {
    .cat-grid {
        grid-template-columns: 1fr
    }

    .card {
        padding: 22px
    }
}

@media(prefers-reduced-motion:reduce) {
    html {
        scroll-behavior: auto
    }
}