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

:root {
    --aula-primary: #0056b3;
    --aula-primary-dark: #004494;
    --aula-accent: #007bff;
    --aula-bg: #eef4fb;
    --aula-card: #ffffff;
    --aula-text: #1a2b4a;
    --aula-muted: #5f6b7a;
    --aula-border: #d8e2ef;
    --aula-footer-bg: #e8f2ff;
    --aula-success: #15803d;
    --aula-success-bg: #ecfdf3;
    --aula-error: #b91c1c;
    --aula-error-bg: #fef2f2;
    --aula-shadow: 0 16px 40px rgba(0, 86, 179, 0.12);
    --aula-radius: 18px;
    --aula-gold: #d4a017;
    --aula-silver: #9ca3af;
    --aula-bronze: #b87333;
    --aula-container-max: 1440px;
    --aula-ranking-width: 300px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--aula-text);
    background: var(--aula-bg);
    line-height: 1.5;
}

.aula-app {
    min-height: 100vh;
}

.aula-app--play {
    padding-top: 12px;
}

.aula-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 32px;
    background: linear-gradient(135deg, var(--aula-primary), var(--aula-accent));
    color: #fff;
}

.aula-topbar__brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.aula-topbar__wheel {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    font-size: 1.2rem;
}

.aula-topbar__brand h1 {
    font-size: 1.35rem;
    font-weight: 700;
}

.aula-topbar__brand p {
    font-size: 0.9rem;
    opacity: 0.92;
}

.aula-progress-wrap {
    max-width: var(--aula-container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.aula-progress-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--aula-primary-dark);
    font-size: 0.92rem;
}

.aula-progress-label {
    white-space: nowrap;
}

.aula-progress-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.aula-timer {
    background: #fff;
    border: 1px solid var(--aula-border);
    border-radius: 999px;
    padding: 5px 12px;
    font-variant-numeric: tabular-nums;
    font-size: 0.85rem;
}

.aula-timer--total {
    color: var(--aula-primary);
}

.aula-progress-bar {
    height: 8px;
    background: #dbe7f5;
    border-radius: 999px;
    overflow: hidden;
}

.aula-progress-bar span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--aula-primary), var(--aula-accent));
    border-radius: inherit;
    transition: width 0.3s ease;
}

.aula-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--aula-ranking-width);
    gap: 16px;
    max-width: var(--aula-container-max);
    margin: 12px auto 20px;
    padding: 0 20px;
    align-items: start;
}

.aula-layout--full {
    grid-template-columns: 1fr;
    max-width: var(--aula-container-max);
}

.aula-question-card,
.aula-ranking-card,
.aula-config-card {
    background: var(--aula-card);
    border: 1px solid var(--aula-border);
    border-radius: var(--aula-radius);
    box-shadow: var(--aula-shadow);
}

.aula-question-card {
    overflow: hidden;
}

.aula-category {
    display: inline-block;
    margin: 14px 18px 0;
    color: var(--aula-accent);
    font-size: 0.82rem;
    font-weight: 700;
}

.aula-question {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: center;
    padding: 10px 18px 0;
}

.aula-question__text {
    font-size: clamp(1.05rem, 1.8vw, 1.35rem);
    line-height: 1.3;
    font-weight: 700;
    color: var(--aula-text);
}

.aula-question__figure {
    width: 220px;
    height: 180px;
    flex-shrink: 0;
    margin: 0;
    padding: 0;
    border-radius: 12px;
    border: 1px solid var(--aula-border);
    background: #fff;
    overflow: hidden;
    position: relative;
}

.aula-question__figure-media {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
}

.aula-question__figure-media img {
    display: block;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    object-fit: contain;
    object-position: center center;
}

.aula-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px 18px;
}

.aula-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border: 1px solid var(--aula-border);
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.aula-option:hover {
    border-color: var(--aula-accent);
    box-shadow: 0 4px 14px rgba(0, 123, 255, 0.08);
}

.aula-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.aula-option__letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--aula-primary);
    color: #fff;
    font-weight: 700;
    flex-shrink: 0;
}

.aula-option__text {
    color: var(--aula-muted);
    font-size: 0.98rem;
    flex: 1;
}

.aula-option__check {
    color: var(--aula-accent);
    font-weight: 700;
    font-size: 1.1rem;
}

.aula-option.is-correct {
    border-color: var(--aula-success);
    background: var(--aula-success-bg);
}

.aula-option.is-correct .aula-option__letter {
    background: var(--aula-success);
}

.aula-option.is-correct .aula-option__check {
    color: var(--aula-success);
}

.aula-option.is-wrong {
    border-color: var(--aula-error);
    background: var(--aula-error-bg);
}

.aula-option.is-wrong .aula-option__letter {
    background: var(--aula-error);
}

.aula-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 2px;
}

.aula-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 18px;
    background: var(--aula-footer-bg);
    border-top: 1px solid var(--aula-border);
}

.aula-card-footer__tip {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--aula-primary-dark);
    font-size: 0.86rem;
}

.aula-ranking-card {
    padding: 14px;
}

.aula-ranking-card__header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.aula-ranking-card__header h3 {
    font-size: 0.92rem;
    color: var(--aula-primary-dark);
}

.aula-ranking-table-wrap {
    overflow-x: auto;
}

.aula-ranking-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}

.aula-ranking-table th,
.aula-ranking-table td {
    padding: 7px 6px;
    text-align: left;
    border-bottom: 1px solid var(--aula-border);
}

.aula-ranking-table th {
    color: var(--aula-muted);
    font-weight: 600;
}

.rank-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    border-radius: 50%;
    font-weight: 700;
}

.rank-medal--1 {
    background: var(--aula-gold);
    color: #fff;
}

.rank-medal--2 {
    background: var(--aula-silver);
    color: #fff;
}

.rank-medal--3 {
    background: var(--aula-bronze);
    color: #fff;
}

.rank-score {
    color: var(--aula-success);
    font-weight: 700;
}

.aula-ranking-empty {
    text-align: center;
    color: var(--aula-muted);
    padding: 24px 8px !important;
}

.aula-ranking-card__footer {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    color: var(--aula-muted);
    font-size: 0.82rem;
}

.aula-config-page {
    max-width: 820px;
    margin: 0 auto;
    padding: 12px 16px 16px;
    flex: 1;
    display: flex;
    align-items: center;
}

.aula-app--config {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

.aula-body--config {
    overflow-x: hidden;
}

.aula-topbar--compact {
    padding: 10px 20px;
    justify-content: space-between;
}

.aula-topbar__actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.aula-topbar__user {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
}

.aula-topbar--compact .aula-topbar__brand h1 {
    font-size: 1.3rem;
    margin: 0;
}

.aula-topbar--compact .aula-topbar__wheel {
    width: 34px;
    height: 34px;
    font-size: 1rem;
}

.aula-config-card {
    padding: 16px 18px;
    width: 100%;
}

.aula-config-card__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.aula-config-card h2 {
    font-size: 1.4rem;
    margin: 0;
    color: var(--aula-primary-dark);
}

.aula-config-card__subtitle {
    color: var(--aula-muted);
    margin: 0;
    font-size: 0.95rem;
}

.aula-config-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.aula-config-grid {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 10px;
    align-items: stretch;
}

.aula-config-grid > .aula-fieldset {
    flex: 1 1 0;
    min-width: 0;
    margin: 0;
}

.aula-config-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 4px;
}

.aula-fieldset {
    border: 1px solid var(--aula-border);
    border-radius: 10px;
    padding: 10px 12px;
    min-width: 0;
    background: #fff;
}

.aula-fieldset--niveis {
    padding-bottom: 8px;
}

.aula-fieldset legend {
    padding: 0 4px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--aula-primary);
}

.aula-chip-group--flat {
    margin-top: 6px;
    gap: 6px;
}

.aula-config-grid .aula-chip-group--flat {
    flex-wrap: wrap;
}

.aula-config-grid .aula-chip--sm span {
    padding: 7px 11px;
    font-size: 0.9rem;
}

.aula-pct-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 6px;
}

.aula-pct-col {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.aula-pct-col__label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--aula-muted);
    text-align: center;
}

.aula-pct-col .aula-chip-group--compact {
    justify-content: center;
    gap: 3px;
}

.aula-chip--xs span {
    min-width: 0;
    padding: 5px 8px;
    font-size: 0.82rem;
    border-radius: 6px;
    line-height: 1.2;
}

.aula-toggle--inline {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--aula-primary-dark);
}

.aula-toggle--inline span {
    white-space: nowrap;
}

.aula-config-footer .aula-btn--primary {
    min-width: 150px;
    padding: 11px 26px;
    font-size: 1rem;
}

.aula-app--config .aula-alert {
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.aula-pct-total {
    margin-top: 6px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--aula-primary-dark);
    text-align: right;
}

.aula-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.aula-chip-group--compact {
    margin-top: 0;
    gap: 5px;
    flex: 1;
}

.aula-chip input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.aula-chip span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    padding: 7px 12px;
    border: 1px solid var(--aula-border);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all 0.2s ease;
}

.aula-chip--sm span {
    min-width: 0;
    padding: 5px 7px;
    font-size: 0.75rem;
    border-radius: 6px;
    line-height: 1.2;
}

.aula-chip input:checked + span {
    background: var(--aula-primary);
    border-color: var(--aula-primary);
    color: #fff;
}

.aula-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    cursor: pointer;
}

.aula-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
    font-weight: 600;
}

.aula-field input {
    padding: 12px 14px;
    border: 1px solid var(--aula-border);
    border-radius: 10px;
    font: inherit;
}

.aula-field__hint {
    color: var(--aula-muted);
    font-size: 0.85rem;
}

.aula-pct-table {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.aula-pct-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.aula-pct-row__label {
    width: 88px;
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--aula-muted);
}

.aula-pct-total {
    margin-top: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--aula-primary-dark);
}

.aula-pct-status {
    margin-left: 8px;
    font-size: 0.88rem;
    font-weight: 600;
}

.aula-pct-status--ok {
    color: var(--aula-success);
}

.aula-pct-status--error {
    color: var(--aula-error);
}

.aula-alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 18px;
}

.aula-alert--error {
    background: var(--aula-error-bg);
    color: var(--aula-error);
    border: 1px solid #fecaca;
}

.aula-alert--success {
    background: var(--aula-success-bg);
    color: var(--aula-success);
    border: 1px solid #bbf7d0;
}

.aula-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.15s ease;
    white-space: nowrap;
}

.aula-btn:hover {
    transform: translateY(-1px);
}

.aula-btn--primary {
    background: var(--aula-primary);
    color: #fff;
}

.aula-btn--secondary {
    background: #fff;
    color: var(--aula-primary);
    border: 1px solid var(--aula-border);
}

.aula-btn--ghost {
    background: transparent;
    color: var(--aula-primary);
    border: 1px dashed var(--aula-border);
}

.aula-btn--outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.85);
}

.aula-btn--encerrar {
    background: #fff;
    color: var(--aula-primary);
    border: 1px solid var(--aula-border);
    padding: 5px 12px;
    font-size: 0.82rem;
}

.aula-btn--next {
    background: #fff;
    color: var(--aula-primary);
    border: 1px solid var(--aula-border);
}

.aula-btn--large {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
}

.aula-error {
    color: var(--aula-error);
    margin-bottom: 20px;
    font-weight: 600;
}

@media (max-width: 960px) {
    .aula-layout {
        grid-template-columns: 1fr;
    }

    .aula-progress-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .aula-progress-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

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

    .aula-question__figure {
        width: 100%;
        max-width: 320px;
        height: 200px;
        justify-self: center;
    }

    .aula-card-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .aula-actions {
        flex-direction: column;
    }

    .aula-btn {
        width: 100%;
    }

    .aula-config-card {
        padding: 14px;
    }

    .aula-pct-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .aula-pct-col .aula-chip-group--compact {
        justify-content: flex-start;
    }

    .aula-pct-col__label {
        text-align: left;
    }

    .aula-config-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .aula-config-footer .aula-btn--primary {
        width: 100%;
    }

    .aula-toggle--inline span {
        white-space: normal;
    }

    .aula-pct-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .aula-pct-row__label {
        width: auto;
    }
}

.aula-btn--sm {
    padding: 6px 12px;
    font-size: 0.82rem;
}

.aula-historico-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 16px 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.aula-historico-filtros {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    align-items: end;
    margin-top: 12px;
}

.aula-historico-filtros label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--aula-muted);
}

.aula-historico-filtros input,
.aula-historico-filtros select {
    padding: 8px 10px;
    border: 1px solid var(--aula-border);
    border-radius: 8px;
    font: inherit;
    font-size: 0.9rem;
}

.aula-historico-table-wrap {
    overflow-x: auto;
    margin-top: 12px;
}

.aula-historico-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.aula-historico-table th,
.aula-historico-table td {
    padding: 10px 8px;
    text-align: left;
    border-bottom: 1px solid var(--aula-border);
    vertical-align: top;
}

.aula-historico-table th {
    color: var(--aula-muted);
    font-weight: 700;
    font-size: 0.8rem;
}

.aula-historico-table td:last-child {
    white-space: nowrap;
}

.aula-historico-empty {
    color: var(--aula-muted);
    margin-top: 12px;
    font-size: 0.92rem;
}

.aula-historico-status {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
}

.aula-historico-status--finalizado {
    background: var(--aula-success-bg);
    color: var(--aula-success);
}

.aula-historico-status--encerrado {
    background: #fef3c7;
    color: #92400e;
}

.aula-historico-status--em_andamento {
    background: var(--aula-footer-bg);
    color: var(--aula-primary);
}

.aula-historico-dl {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.aula-historico-dl dt {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--aula-muted);
    margin-bottom: 2px;
}

.aula-historico-dl dd {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--aula-text);
    margin: 0;
}

.aula-body--auth {
    min-height: 100vh;
    min-height: 100dvh;
    background: linear-gradient(135deg, rgba(0, 86, 179, 0.92), rgba(0, 123, 255, 0.88));
}

.aula-auth-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.aula-auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--aula-card);
    border-radius: var(--aula-radius);
    box-shadow: var(--aula-shadow);
    border: 1px solid var(--aula-border);
    padding: 24px;
}

.aula-auth-card__head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.aula-auth-card__head h1 {
    font-size: 1.35rem;
    margin: 0;
    color: var(--aula-primary-dark);
}

.aula-auth-card__head p {
    margin: 4px 0 0;
    color: var(--aula-muted);
    font-size: 0.92rem;
}

.aula-auth-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.aula-conta-card {
    max-width: 520px;
}

.aula-perfil-form--page {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.aula-perfil-form--page .aula-btn {
    align-self: flex-start;
    margin-top: 4px;
}

@media (max-width: 640px) {
    .aula-topbar__actions {
        flex-wrap: wrap;
        justify-content: flex-end;
    }
}

.aula-modal-open {
    overflow: hidden;
}

.aula-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.aula-modal[hidden] {
    display: none;
}

.aula-form-hidden {
    display: none !important;
}

.aula-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
}

.aula-modal__dialog {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--aula-card);
    border-radius: 14px;
    border: 1px solid var(--aula-border);
    box-shadow: var(--aula-shadow);
    padding: 22px;
}

.aula-modal__title {
    margin: 0 0 10px;
    font-size: 1.15rem;
    color: var(--aula-primary-dark);
}

.aula-modal__message {
    margin: 0 0 20px;
    color: var(--aula-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.aula-modal__actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}