/* DuoLearn — alinhado ao visual da app Unity (DuoTheme + DuoLearnApp) */
:root {
    --duo-green: #58cc02;
    --duo-green-dark: #46a302;
    --duo-green-light: #89e219;
    --duo-blue: #1cb0f6;
    --duo-blue-dark: #1899d6;
    --duo-red: #ff4b4b;
    --duo-red-dark: #ea2b2b;
    --duo-orange: #ff9600;
    --duo-bg: #235390;
    --duo-bg-deep: #1e4a7a;
    --duo-bg-soft: #f7f7f7;
    --duo-card: #ffffff;
    --duo-border: #e5e5e5;
    --duo-text: #3c3c3c;
    --duo-text-muted: #616971;
    --duo-radius: 16px;
    --duo-radius-btn: 16px;
    --duo-radius-pill: 22px;
    --duo-font: "Nunito", system-ui, -apple-system, sans-serif;
}

.duo-body {
    font-family: var(--duo-font);
    color: var(--duo-text);
    min-height: 100vh;
}

/* === Home: fundo claro + painel azul central (layout de referência) === */
.duo-page-home {
    background: #d4e3f2;
}

.duo-page-lesson {
    background: #f7f7f7;
}

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

.duo-lesson-page.duo-app {
    min-height: 100vh;
}

/* Topbar: branca, risco azul fino */
.duo-topbar {
    background: #fff;
    position: relative;
}

.duo-topbar-home {
    box-shadow: none;
}

.duo-topbar-inner {
    display: flex;
    align-items: center;
}

.duo-topbar-rule {
    height: 3px;
    background: var(--duo-blue);
    width: 100%;
}

.duo-topbar-rule-thin {
    height: 1px;
    background: rgba(28, 176, 246, 0.5);
    width: 100%;
}

.duo-topbar-row {
    min-height: 54px;
    width: 100%;
}

.duo-topbar-center {
    min-width: 0;
}

.duo-brand-text {
    font-weight: 800;
    font-size: clamp(1.2rem, 3.2vw, 1.45rem);
    color: var(--duo-green);
    letter-spacing: -0.02em;
}

/* Streak: pill laranja claro ao centro */
.duo-streak-pill-home {
    background: #fff0dc;
    border-radius: 999px;
    padding: 0.38rem 1.15rem;
    min-width: 3rem;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.duo-streak-pill-home .duo-streak-num {
    color: #d96d00;
    font-size: 1.05rem;
}

/* XP: mini barra + texto */
.duo-xp-row {
    min-width: 0;
}

.duo-xp-mini-track {
    width: 76px;
    height: 11px;
    border-radius: 6px;
    background: #b8e3f7;
    overflow: hidden;
    flex-shrink: 0;
}

@media (min-width: 420px) {
    .duo-xp-mini-track {
        width: 96px;
    }
}

.duo-xp-mini-fill {
    height: 100%;
    border-radius: 6px;
    background: var(--duo-blue-dark);
    transition: width 0.35s ease;
}

.duo-xp-label-row {
    font-size: 0.92rem;
    line-height: 1;
}

.duo-xp-word {
    font-weight: 700;
    color: #5a6570;
    margin-right: 0.15rem;
}

.duo-xp-label-row .duo-xp-num {
    color: var(--duo-blue-dark);
}

/* Painel principal azul com borda céu */
.duo-home-outer {
    display: flex;
    justify-content: center;
}

.duo-main-home {
    width: 100%;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.duo-home-shell {
    background: var(--duo-bg);
    border: 2px solid #7ec8ef;
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 10px 32px rgba(25, 60, 110, 0.28);
}

/* Faixa do hero: azul um pouco mais claro */
.duo-hero-band {
    background: #2f6faf;
    padding: 1.65rem 1.2rem 1.45rem;
}

.duo-hero-title {
    font-weight: 800;
    color: #fff;
    font-size: clamp(1.45rem, 4vw, 1.9rem);
    line-height: 1.2;
}

.duo-hero-sub {
    color: rgba(255, 255, 255, 0.96) !important;
    font-size: clamp(0.88rem, 2.3vw, 1.02rem);
    font-weight: 500;
    line-height: 1.45;
}

.duo-path-shell {
    padding: 0.85rem 0.85rem 1.2rem;
    background: var(--duo-bg);
}

.duo-path {
    padding-left: 0;
}

.duo-path-line {
    display: none;
}

/* Cartões brancos, borda azul clara */
.duo-lesson-btn {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    width: 100%;
    min-height: 84px;
    padding: 0.8rem 1rem;
    background: #fff;
    border-radius: var(--duo-radius) !important;
    border: 1px solid #8ed4f5;
    box-shadow: 0 2px 6px rgba(0, 35, 70, 0.1);
    color: var(--duo-text) !important;
    transition: transform 0.08s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.duo-lesson-btn:hover {
    filter: brightness(1.02);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 35, 70, 0.14);
}

.duo-lesson-btn:active {
    transform: translateY(0);
}

.duo-lesson-icon-wrap {
    flex: 0 0 54px;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: #d6effc;
    border: 1px solid rgba(28, 176, 246, 0.35);
}

.duo-lesson-icon {
    font-size: 1.65rem;
    line-height: 1;
}

.duo-lesson-texts {
    min-width: 0;
}

.duo-lesson-title {
    font-weight: 800;
    font-size: 1.02rem;
    line-height: 1.25;
}

.duo-lesson-sub {
    font-size: 0.875rem;
    color: var(--duo-text-muted);
    margin-top: 0.15rem;
    line-height: 1.3;
}

.duo-lesson-chevron-wrap {
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: #d6effc;
    border: 1px solid rgba(28, 176, 246, 0.35);
}

.duo-chevron {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--duo-blue-dark);
    line-height: 1;
}

/* Chips antigos (outras páginas, se existirem) */
.duo-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border-radius: var(--duo-radius-pill);
    padding: 0.35rem 0.65rem;
    font-size: 0.95rem;
    line-height: 1;
}

.duo-chip-streak {
    background: #fff7eb;
}

.duo-chip-streak .duo-streak-num {
    color: var(--duo-orange);
}

.duo-chip-xp .duo-xp-num {
    color: var(--duo-blue-dark);
}

/* === Cabeçalho da lição (como Unity LessonHeader) === */
.duo-lesson-header {
    background: linear-gradient(180deg, #feffff 0%, #f5f8fc 100%);
    box-shadow: 0 4px 14px rgba(15, 40, 72, 0.1);
    z-index: 1020;
}

.duo-lesson-header-inner {
    padding-top: 0.75rem;
    padding-bottom: 0.5rem;
}

.duo-lesson-toolbar {
    min-height: 52px;
}

.duo-back-pill {
    flex: 0 0 52px;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: #e8f0fa;
    color: #475056 !important;
    font-size: 1.15rem;
    font-weight: 800;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset;
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: background 0.12s ease, transform 0.08s ease;
}

.duo-back-pill:hover {
    background: #dce8f4;
    color: #2c3338 !important;
}

.duo-back-pill:active {
    transform: scale(0.96);
}

.duo-lesson-title-header {
    font-weight: 800;
    font-size: clamp(1rem, 3vw, 1.15rem);
    color: var(--duo-text);
    min-width: 0;
}

.duo-counter-pill {
    flex: 0 0 auto;
    padding: 0.45rem 0.65rem;
    min-width: 5.5rem;
    text-align: center;
    border-radius: var(--duo-radius-pill);
    background: rgba(28, 176, 246, 0.14);
    color: var(--duo-blue-dark);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 4px rgba(28, 176, 246, 0.15);
}

.duo-progress-track-wrap {
    width: 100%;
}

.duo-progress.duo-progress-lesson {
    height: 18px;
    border-radius: 9px;
    background: #e1e8ee;
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
}

.duo-progress-lesson .duo-progress-bar {
    height: 100%;
    border-radius: 9px;
    background: var(--duo-green);
    box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.08);
    transition: width 0.35s ease, background 0.25s ease;
}

.duo-progress-lesson .duo-progress-bar.duo-progress-bar--inactive {
    background: #aeb8c2;
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.06);
}

.duo-lesson-header-rule {
    height: 3px;
    background: var(--duo-blue);
    width: 100%;
}

.duo-lesson-main {
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    min-height: calc(100vh - 200px);
}

/* Cartão pergunta — estilo “jogo” (Unity / Duolingo) */
.duo-question-card {
    border-radius: 18px !important;
    background: var(--duo-card);
    border: 2px solid var(--duo-border) !important;
    box-shadow: 0 4px 0 #d1d1d1, 0 8px 24px rgba(15, 40, 72, 0.08);
    overflow: hidden;
}

.duo-question-card-body {
    padding: 1.75rem 1.35rem 2rem;
}

@media (min-width: 576px) {
    .duo-question-card-body {
        padding: 2rem 1.75rem 2.25rem;
    }
}

.duo-prompt-label {
    letter-spacing: 0.08em;
    font-size: 0.72rem !important;
    color: #777 !important;
}

.duo-phrase {
    color: var(--duo-text);
    min-height: 3rem;
    line-height: 1.25;
    font-size: clamp(1.65rem, 5vw, 2.35rem) !important;
    font-weight: 800 !important;
}

/* Lista de opções: coluna única, largura total do cartão */
.duo-choices.d-grid {
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
}

/* Bootstrap .btn: não sobrescrever bordas do .duo-choice */
.duo-choice.btn {
    --bs-btn-border-width: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

/* Botões de opção — relevo como no jogo */
.duo-choice {
    border-radius: var(--duo-radius-btn) !important;
    border: 2px solid var(--duo-border) !important;
    border-bottom-width: 4px !important;
    font-weight: 700 !important;
    font-size: 1.08rem !important;
    padding: 1rem 1.15rem !important;
    min-height: 58px;
    background: #fff !important;
    color: var(--duo-text) !important;
    text-align: left !important;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
}

.duo-choice:hover:not(:disabled) {
    background: #f4f7fa !important;
}

.duo-choice:active:not(:disabled) {
    transform: translateY(2px);
    border-bottom-width: 2px !important;
}

.duo-choice.is-selected {
    border-color: var(--duo-blue) !important;
    background: #ddf4ff !important;
}

.duo-choice.is-correct {
    border-color: var(--duo-green-dark) !important;
    background: #d7ffb8 !important;
    color: var(--duo-green-dark) !important;
}

.duo-choice.is-wrong {
    border-color: var(--duo-red-dark) !important;
    background: #ffdfe0 !important;
    color: var(--duo-red-dark) !important;
}

.duo-choice:disabled {
    opacity: 1;
    cursor: default;
}

/* Compat: .duo-card genérico */
.duo-card.card {
    border: none;
}

/* Rodapé feedback */
.duo-feedback-footer {
    background: #fff;
    border-top: 3px solid var(--duo-border);
    box-shadow: 0 -8px 28px rgba(15, 40, 72, 0.12);
    z-index: 1040;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.duo-feedback-footer.is-correct {
    background: #d7ffb8;
    border-top-color: var(--duo-green);
}

.duo-feedback-footer.is-wrong {
    background: #ffdfe0;
    border-top-color: var(--duo-red);
}

.duo-feedback-row {
    align-items: center;
}

.duo-feedback-msg {
    min-width: 0;
}

#feedback-msg.is-correct-text {
    color: var(--duo-green-dark);
    font-size: 1.1rem;
}

#feedback-msg.is-wrong-text {
    color: var(--duo-red-dark);
    font-size: 1.1rem;
}

.duo-btn-primary.duo-btn-next {
    background: var(--duo-green) !important;
    border: none !important;
    border-bottom: 4px solid var(--duo-green-dark) !important;
    color: #fff !important;
    font-weight: 800 !important;
    border-radius: var(--duo-radius-btn) !important;
    padding: 0.75rem 1.5rem !important;
    font-size: 1rem !important;
    min-width: 268px;
    max-width: 100%;
    white-space: nowrap;
    flex-shrink: 0;
    text-transform: none;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
}

.duo-btn-primary.duo-btn-next:hover {
    filter: brightness(1.05);
    color: #fff !important;
}

.duo-btn-primary.duo-btn-next:active {
    border-bottom-width: 2px !important;
    transform: translateY(2px);
}

.pb-140 {
    padding-bottom: 140px !important;
}

/* Barra de progresso legada (se usada noutros sítios) */
.duo-progress:not(.duo-progress-lesson) {
    height: 14px;
    background: #e5e5e5;
    overflow: hidden;
}

.duo-progress:not(.duo-progress-lesson) .duo-progress-bar {
    height: 100%;
    background: var(--duo-green);
    transition: width 0.35s ease;
    box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.08);
}

.duo-back {
    font-size: 1.25rem;
    font-weight: 800;
    color: #afafaf !important;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 576px) {
    .duo-lesson-btn {
        min-height: 80px;
        gap: 0.75rem;
        padding: 0.75rem 0.85rem;
    }

    .duo-lesson-icon-wrap {
        flex-basis: 52px;
        width: 52px;
        height: 52px;
    }

    .duo-btn-primary.duo-btn-next {
        min-width: 0;
        width: 100%;
    }

    .duo-feedback-row {
        flex-direction: column;
        align-items: stretch !important;
    }

    .duo-xp-mini-track {
        width: 64px;
    }

    .duo-streak-pill-home {
        padding: 0.32rem 0.75rem;
    }
}

@media (max-width: 380px) {
    .duo-brand-text {
        font-size: 1.05rem;
    }

    .duo-xp-label-row {
        font-size: 0.82rem;
    }
}