/* =====================================================================
   ProAprova Redação — Frontend (base)
   Reproduz os estilos do plugin original e moderniza o que é seguro.
   ATENÇÃO: o bloco "FOLHA PAUTADA" mantém medidas IDÊNTICAS ao original
   (line-height 38px, 1140px, grid 36.5px/38px, fonte 19px). Não alterar.
   ===================================================================== */

:root {
    /* Tokens originais (mantidos para compatibilidade com var() inline) */
    --pa-blue: #0073e6;
    --pa-dark: #1f2937;
    --pa-text-gray: #4b5563;
    --pa-bg: #f8fafc;
    --pa-line: #cbd5e1;
    --pa-red-margin: #ef4444;

    /* Tokens novos (apenas para o refino visual) */
    --pa-blue-600: #005bb5;
    --pa-border: #e5e7eb;
    --pa-muted: #64748b;
    --pa-success: #10b981;
    --pa-success-600: #059669;
    --pa-success-bg: #dcfce7;
    --pa-warning: #f59e0b;

    --pa-radius: 14px;
    --pa-radius-sm: 10px;
    --pa-radius-pill: 999px;

    --pa-shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);
    --pa-shadow-md: 0 4px 12px rgba(15, 23, 42, .06), 0 2px 4px rgba(15, 23, 42, .04);
    --pa-shadow-lg: 0 12px 30px rgba(15, 23, 42, .10);

    --pa-ease: cubic-bezier(.2, .7, .3, 1);
    --pa-t: .22s var(--pa-ease);

    /* --- Superfícies e tinta --- */
    --pa-surface: #ffffff;
    --pa-surface-2: #f3f4f6;
    --pa-divider: #f1f5f9;
    --pa-ink: #111827;

    /* --- Folha pautada ---
       Só as CORES da folha vivem aqui. As medidas (38px de pauta, 1140px
       de altura, grid 36.5px) continuam fixas no bloco da folha: mexer
       nelas desalinha o texto das linhas. */
    --pa-paper-bg: #fafafa;
    --pa-paper-border: #d1d5db;
    --pa-paper-num: #9ca3af;

    /* --- Estados --- */
    --pa-success-text: #166534;
    --pa-warning-bg: #fef3c7;
    --pa-warning-text: #d97706;
    --pa-info-bg: #e0f2fe;

    color-scheme: light;
}

/* =====================================================================
   MODO ESCURO
   ---------------------------------------------------------------------
   Só as cores mudam: nenhuma medida da folha pautada é tocada.

   A classe vai em <html>, aplicada pelo JavaScript, para alcançar também
   o fundo da página — sem isso a plataforma ficaria como uma ilha escura
   cercada pelo branco do tema.
   ===================================================================== */

html.pa-tema-dark {
    /* Azul clareado: o original perde contraste sobre fundo escuro */
    --pa-blue: #4d9aff;
    --pa-blue-600: #7ab5ff;

    --pa-dark: #e8ebf0;
    --pa-text-gray: #b4bdcc;
    --pa-muted: #9aa5b8;

    --pa-surface: #1d2432;
    --pa-surface-2: #232b3b;
    --pa-divider: #262f3f;
    --pa-bg: #161b26;
    --pa-border: #2c3547;
    --pa-ink: #e8ebf0;

    /* A folha acompanha o tema: uma página branca acesa num editor escuro
       cansa a vista justamente na tela em que o aluno passa mais tempo. */
    --pa-paper-bg: #1a2130;
    --pa-paper-border: #313b4e;
    --pa-paper-num: #6b7688;
    --pa-line: #39435a;          /* Pauta */
    --pa-red-margin: #c25555;    /* Margem: vermelho suavizado */

    --pa-success: #34d399;
    --pa-success-600: #5ceac6;
    --pa-success-bg: #10312a;
    --pa-success-text: #6ee7b7;
    --pa-warning: #fbbf24;
    --pa-warning-bg: #33270f;
    --pa-warning-text: #f5d98a;
    --pa-info-bg: #12303f;

    --pa-shadow-sm: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .3);
    --pa-shadow-md: 0 4px 12px rgba(0, 0, 0, .45), 0 2px 4px rgba(0, 0, 0, .3);
    --pa-shadow-lg: 0 12px 30px rgba(0, 0, 0, .55);

    color-scheme: dark;
}

/* Fundo da página no escuro. */
html.pa-tema-dark,
html.pa-tema-dark body {
    background-color: var(--pa-bg);
}

/* ------------------------------- Shell ------------------------------- */
.pa-app {
    font-family: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
    color: var(--pa-text-gray);
    max-width: 1200px;
    margin: 0 auto;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.pa-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 24px;
}
.pa-page-title {
    margin: 0;
    color: var(--pa-dark);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -.01em;
}

.pa-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--pa-surface);
    padding: 20px 25px;
    border: 1px solid var(--pa-border);
    border-radius: var(--pa-radius);
    box-shadow: var(--pa-shadow-md);
    margin-bottom: 25px;
    gap: 20px;
    position: relative;
    z-index: 10;
}
.pa-title-area { display: flex; align-items: center; gap: 15px; flex: 1; }
.pa-title-area h2 {
    margin: 0;
    font-size: 20px;
    color: var(--pa-dark);
    font-weight: 800;
    letter-spacing: -.01em;
}

/* ------------------------------ Botões ------------------------------ */
.pa-btn-back {
    background: var(--pa-surface-2);
    color: var(--pa-text-gray);
    padding: 9px 16px;
    border-radius: var(--pa-radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    border: 1px solid var(--pa-border);
    white-space: nowrap;
    transition: background var(--pa-t), transform var(--pa-t), box-shadow var(--pa-t);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.pa-btn-back:hover { background: var(--pa-border); transform: translateY(-1px); }
.pa-btn-back:active { transform: translateY(0); }
.pa-btn-back:focus-visible { outline: 3px solid rgba(0, 115, 230, .35); outline-offset: 2px; }

/* Modificador escuro (botão "Minhas Redações") */
.pa-btn-dark { background: var(--pa-dark); color: var(--pa-surface); border-color: var(--pa-dark); }
.pa-btn-dark:hover { background: var(--pa-ink); color: var(--pa-surface); }

.pa-btn-pdf {
    flex-shrink: 0;
    background: var(--pa-surface);
    color: var(--pa-blue);
    border: 2px solid var(--pa-blue);
    padding: 10px 20px;
    border-radius: var(--pa-radius-sm);
    text-decoration: none !important;
    font-weight: 700;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background var(--pa-t), color var(--pa-t), transform var(--pa-t), box-shadow var(--pa-t);
    cursor: pointer;
    z-index: 20;
    position: relative;
}
.pa-btn-pdf:hover { background: var(--pa-blue); color: var(--pa-surface); transform: translateY(-1px); box-shadow: var(--pa-shadow-md); }
.pa-btn-pdf:focus-visible { outline: 3px solid rgba(0, 115, 230, .35); outline-offset: 2px; }
.pa-btn-pdf.disabled { opacity: .55; cursor: not-allowed; }
.pa-btn-pdf.disabled:hover { background: var(--pa-surface); color: var(--pa-blue); transform: none; box-shadow: none; }

/* --------------------------- Workspace ------------------------------ */
.pa-workspace { display: flex; gap: 30px; align-items: flex-start; }
.pa-sidebar {
    width: 40%;
    background: var(--pa-surface);
    padding: 25px;
    border-radius: var(--pa-radius);
    border: 1px solid var(--pa-border);
    position: sticky;
    top: 20px;
    max-height: 85vh;
    overflow-y: auto;
    color: var(--pa-text-gray);
    font-size: 15px;
    box-shadow: var(--pa-shadow-sm);
}
.pa-sidebar.hidden { display: none; }
.pa-sidebar-title {
    margin-top: 0;
    font-size: 16px;
    color: var(--pa-blue);
    text-transform: uppercase;
    letter-spacing: .04em;
}
.pa-main { flex-grow: 1; overflow: hidden; padding-bottom: 40px; }
.pa-toggle-btn {
    background: var(--pa-dark);
    color: var(--pa-surface);
    border: none;
    padding: 10px 18px;
    border-radius: var(--pa-radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 15px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background var(--pa-t), transform var(--pa-t);
}
.pa-toggle-btn:hover { background: var(--pa-ink); transform: translateY(-1px); }

/* ============================ FOLHA PAUTADA ==========================
   Valores IDÊNTICOS ao original — não alterar (alinhamento das linhas).
   ==================================================================== */
.pa-paper {
    background: var(--pa-paper-bg);
    border: 1px solid var(--pa-paper-border);
    border-radius: 4px;
    box-shadow: 2px 2px 15px rgba(0, 0, 0, 0.05);
    display: flex;
    max-width: 950px;
    margin: 0 auto;
    padding: 30px 40px;
    box-sizing: border-box;
}
.pa-margins { width: 40px; flex-shrink: 0; border-right: 2px solid var(--pa-red-margin); margin-right: 15px; }
.pa-line-num { height: 38px; line-height: 38px; font-size: 13px; color: var(--pa-paper-num); user-select: none; font-family: sans-serif; }
.pa-lines-container { flex-grow: 1; position: relative; height: 1140px; background-image: linear-gradient(transparent 36.5px, var(--pa-line) 36.5px); background-size: 100% 38px; }
.pa-textarea { width: 100%; height: 1140px; line-height: 38px !important; font-size: 19px !important; font-family: 'Georgia', serif; color: var(--pa-ink); background: transparent; border: none; outline: none; resize: none; padding: 0 10px 0 0 !important; margin: 0 !important; vertical-align: top; box-sizing: border-box; overflow: hidden; white-space: pre-wrap; word-break: break-all; display: block; }
/* ==================== FIM DA FOLHA PAUTADA (não alterar) ============= */

.pa-submit-btn {
    background: var(--pa-success);
    color: var(--pa-surface);
    border: none;
    width: 100%;
    max-width: 950px;
    display: block;
    margin: 30px auto 0 auto;
    padding: 20px;
    border-radius: var(--pa-radius);
    font-size: 18px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .02em;
    cursor: pointer;
    transition: background var(--pa-t), transform var(--pa-t), box-shadow var(--pa-t);
}
.pa-submit-btn:hover { background: var(--pa-success-600); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(16, 185, 129, .25); }
.pa-submit-btn:active { transform: translateY(0); }

/* ------------------------ Painel do aluno --------------------------- */
.pa-history-card {
    background: var(--pa-surface);
    border-radius: var(--pa-radius);
    border: 1px solid var(--pa-border);
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: var(--pa-shadow-sm);
    transition: box-shadow var(--pa-t), transform var(--pa-t);
}
.pa-history-card:hover { box-shadow: var(--pa-shadow-md); }
.pa-history-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--pa-divider);
    padding-bottom: 15px;
    gap: 12px;
}
.pa-history-date { color: var(--pa-muted); font-size: 13px; }
.pa-history-title { margin: 5px 0 0 0; color: var(--pa-dark); font-size: 18px; }
.pa-history-pending { color: var(--pa-muted); margin: 0; font-size: 14px; }

.pa-status-badge {
    padding: 6px 14px;
    border-radius: var(--pa-radius-pill);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .03em;
    white-space: nowrap;
}
.pa-badge-pendente { background: var(--pa-warning-bg); color: var(--pa-warning-text); }
.pa-badge-corrigida { background: var(--pa-success-bg); color: var(--pa-success-text); }

.pa-feedback-box {
    background: var(--pa-bg);
    border-left: 4px solid var(--pa-blue);
    padding: 20px;
    margin-top: 15px;
    border-radius: 0 var(--pa-radius-sm) var(--pa-radius-sm) 0;
}
.pa-feedback-head { margin: 0 0 10px 0; color: var(--pa-dark); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.pa-feedback-nota { color: var(--pa-blue); font-size: 22px; font-weight: 800; }
.pa-feedback-text { white-space: pre-wrap; }

/* --------------------------- Empty states --------------------------- */
.pa-empty {
    background: var(--pa-surface);
    padding: 48px 30px;
    text-align: center;
    border-radius: var(--pa-radius);
    border: 1px solid var(--pa-border);
    box-shadow: var(--pa-shadow-sm);
    color: var(--pa-muted);
}
.pa-empty-icon { font-size: 40px; margin-bottom: 10px; }
.pa-empty h3 { color: var(--pa-paper-num); margin: 0 0 6px 0; font-weight: 700; }
.pa-empty p { margin: 0; color: var(--pa-muted); }

/* ------------------------- Sucesso de envio ------------------------- */
.pa-success-box {
    background: var(--pa-success-bg);
    padding: 34px;
    border-radius: var(--pa-radius);
    text-align: center;
    box-shadow: var(--pa-shadow-sm);
}
.pa-success-box h2 { color: var(--pa-success-text); margin: 0 0 8px 0; }
.pa-success-box p { color: var(--pa-success-text); margin: 0 0 6px 0; }
.pa-success-back { margin: 15px auto 0 auto; display: inline-flex; }

/* ---------------------------- Paginação ----------------------------- */
.pa-pagination { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 40px; }
.pa-page-link {
    padding: 8px 14px;
    background: var(--pa-surface);
    border: 1px solid var(--pa-border);
    border-radius: var(--pa-radius-sm);
    color: var(--pa-text-gray);
    text-decoration: none;
    font-weight: 600;
    transition: background var(--pa-t), color var(--pa-t), border-color var(--pa-t), transform var(--pa-t);
    font-size: 14px;
}
.pa-page-link:hover { background: var(--pa-surface-2); color: var(--pa-dark); border-color: var(--pa-paper-border); transform: translateY(-1px); }
.pa-page-active { background: var(--pa-blue); color: var(--pa-surface) !important; border-color: var(--pa-blue); }
.pa-page-active:hover { background: var(--pa-blue-600); color: var(--pa-surface); border-color: var(--pa-blue-600); }

/* --------------------- Acessibilidade / motion ---------------------- */
@media (prefers-reduced-motion: reduce) {
    * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

/* ---------------------------------------------------------------------
 * Botão "Voltar ao Painel"
 *
 * Fica FORA de .pa-app (é prefixado pelo controller, antes do wrapper de
 * cada tela), então repete o max-width de .pa-app para alinhar com o
 * conteúdo em vez de encostar na borda da página.
 * ------------------------------------------------------------------ */
/* Barra superior: agrupa o voltar e o alternador de tema. Repete o
   max-width de .pa-app porque é prefixada FORA do wrapper de cada tela. */
.pa-topo-barra {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    max-width: 1200px;
    margin: 0 auto 14px;
    font-family: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
}

.pa-tema-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    padding: 0;
    background: var(--pa-surface);
    border: 1px solid var(--pa-border);
    border-radius: var(--pa-radius-pill);
    color: var(--pa-text-gray);
    cursor: pointer;
    transition: color var(--pa-t), border-color var(--pa-t);
}

.pa-tema-btn:hover,
.pa-tema-btn:focus-visible {
    color: var(--pa-blue);
    border-color: var(--pa-blue);
}

.pa-tema-btn svg { display: block; }

/* Um ícone por estado: sol no escuro (a ação é clarear), lua no claro. */
.pa-tema-btn .pa-ico-sol { display: none; }
html.pa-tema-dark .pa-tema-btn .pa-ico-sol { display: block; }
html.pa-tema-dark .pa-tema-btn .pa-ico-lua { display: none; }

.pa-voltar-painel {
    margin: 0;
    font-family: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
}

.pa-voltar-painel__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px 7px 10px;
    border: 1px solid var(--pa-border);
    border-radius: 999px;
    background: var(--pa-surface);
    color: var(--pa-text-gray);
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    transition: color .15s ease, border-color .15s ease;
}

.pa-voltar-painel__link:hover,
.pa-voltar-painel__link:focus {
    color: var(--pa-blue);
    border-color: var(--pa-blue);
}
