:root {
    --bg-base: #0f1012;
    --bg-surface: #16171a;
    --bg-elevated: #1e1f24;
    --bg-hover: #26272e;

    --border: #292a30;
    --border-light: #383942;

    --text-main: #f3f1ec;
    --text-muted: #a3a099;
    --text-dim: #706e68;

    --accent-beige: #e8ded1;
    --accent-beige-hover: #f5eee4;
    --accent-contrast: #121315;
    --accent-blue: #38bdf8;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    --transition: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:
        'Plus Jakarta Sans',
        -apple-system,
        BlinkMacSystemFont,
        sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 24px 16px 40px;
    line-height: 1.5;
    overflow-x: hidden;
}

.app-container {
    width: 100%;
    max-width: 780px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

/* Header e navegação */
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
}

.brand-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Seletor de idiomas */
.lang-wrapper {
    position: relative;
}

.lang-button {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
}

.lang-button:hover {
    color: var(--text-main);
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    width: 175px;
    max-height: 260px;
    overflow-y: auto;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    padding: 4px;
    z-index: 1000;
}

.lang-item {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.lang-item:hover {
    background: var(--bg-hover);
    color: var(--text-main);
}

.lang-item.active {
    background: var(--bg-elevated);
    color: var(--accent-beige);
    font-weight: 600;
}

/* Seção Hero e Formulário */
.content-flow {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.hero-block {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 8px 0;
}

.hero-block h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.hero-block p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

.input-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 12px;
}

.input-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field-box {
    display: flex;
    align-items: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0 12px;
    transition: var(--transition);
}

.field-box:focus-within {
    border-color: var(--border-light);
}

.field-icon {
    font-size: 1.15rem;
    color: var(--text-dim);
}

.field-box input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 0.92rem;
    padding: 13px 10px;
}

.field-box input::placeholder {
    color: var(--text-dim);
}

.btn-clear {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

.btn-clear:hover {
    color: var(--text-main);
}

.btn-paste {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.btn-paste:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.08);
}

.btn-primary-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent-beige);
    color: var(--accent-contrast);
    border: none;
    border-radius: var(--radius-md);
    padding: 13px 20px;
    font-size: 0.94rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary-action:hover {
    background: var(--accent-beige-hover);
    transform: translateY(-1px);
}

/* Status e Carregamento */
.status-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    animation: fadeIn 0.2s ease-out;
}

.spinner {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border-light);
    border-top-color: var(--accent-beige);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.status-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.status-text strong {
    font-size: 0.88rem;
    color: var(--text-main);
}

.status-text span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.status-box.error {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.04);
}

.error-icon {
    font-size: 1.3rem;
    color: #ef4444;
}

/* Card de Resultado */
.result-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    animation: fadeIn 0.25s ease-out;
}

.result-cover-box {
    width: 100%;
    max-height: 240px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.result-cover-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.author-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.76rem;
    font-weight: 500;
    color: var(--text-muted);
    width: fit-content;
}

.video-desc {
    font-size: 0.88rem;
    color: var(--text-main);
    line-height: 1.4;
    word-break: break-word;
}

.download-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dl-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    background: var(--bg-elevated);
    color: var(--text-main);
}

.dl-button i {
    font-size: 1.25rem;
    color: var(--accent-beige);
}

.dl-button-text strong {
    font-size: 0.86rem;
    font-weight: 600;
    display: block;
}

.dl-button-text small {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.dl-button:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

/* ====================================================
   Estrutura do Carrossel com Mesclagem de Áudio
   ==================================================== */
.carousel-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.carousel-top-bar {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
}

.carousel-actions-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

.btn-download-all {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    padding: 12px 16px;
    background: var(--accent-beige);
    color: var(--accent-contrast);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-download-all:hover {
    background: var(--accent-beige-hover);
    transform: translateY(-1px);
}

.btn-download-all i {
    font-size: 1.15rem;
}

.btn-download-music {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-main);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-download-music:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
    color: var(--accent-beige);
}

.btn-download-music i {
    font-size: 1.15rem;
    color: var(--accent-beige);
}

/* Botão especial de Gerar Vídeo Mesclado */
.btn-create-video {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1.2;
    padding: 12px 16px;
    background: #1f2228;
    border: 1px solid rgba(232, 222, 209, 0.4);
    color: var(--accent-beige);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-create-video:hover {
    background: #282b34;
    border-color: var(--accent-beige);
}

.btn-create-video i {
    font-size: 1.15rem;
    color: #ffd166;
}

.btn-create-video:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Barra de progresso de renderização do vídeo */
.render-progress-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: fadeIn 0.2s ease-out;
}

.render-progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.render-progress-track {
    width: 100%;
    height: 6px;
    background: var(--bg-surface);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.render-progress-bar {
    height: 100%;
    width: 0%;
    background: #22c55e;
    transition: width 0.1s linear;
}

/* Header de seleção rápida no carrossel */
.carousel-select-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    padding: 2px 2px;
}

.btn-text-action {
    background: transparent;
    border: none;
    color: var(--accent-blue);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}

.btn-text-action:hover {
    text-decoration: underline;
}

/* Grid com Miniaturas e Checkboxes */
.carousel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    width: 100%;
}

.carousel-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: var(--transition);
}

.carousel-card.is-selected {
    border-color: var(--accent-beige);
}

.carousel-card:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.carousel-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #000;
    cursor: pointer;
}

.carousel-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition:
        opacity 0.2s ease,
        transform 0.2s ease;
}

.carousel-card:not(.is-selected) .carousel-preview img {
    opacity: 0.35;
    filter: grayscale(60%);
}

.carousel-card:hover .carousel-preview img {
    transform: scale(1.02);
}

.photo-check {
    position: absolute;
    top: 6px;
    left: 6px;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-beige);
    cursor: pointer;
    z-index: 2;
}

.carousel-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    color: var(--text-main);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.carousel-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.carousel-btn i {
    font-size: 0.95rem;
    color: var(--accent-beige);
}

.carousel-btn:hover {
    background: var(--accent-beige);
    color: var(--accent-contrast);
    border-color: var(--accent-beige);
}

.carousel-btn:hover i {
    color: var(--accent-contrast);
}

/* Cards informativos de SEO */
.info-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.info-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-tag {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-beige);
    text-transform: uppercase;
}

.info-card strong {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.info-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Seção de FAQ */
.faq-container {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.faq-header i {
    font-size: 1.25rem;
    color: var(--accent-beige);
}

.faq-container h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.faq-question strong {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-main);
}

.faq-answer p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.45;
}

/* Rodapé com Link do GitHub */
.footer-bar {
    padding-top: 16px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-dim);
}

.footer-github {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--accent-beige);
    text-decoration: none;
    font-weight: 600;
    margin-left: 4px;
    transition: var(--transition);
    vertical-align: middle;
}

.footer-github i {
    font-size: 1.05rem;
}

.footer-github:hover {
    color: var(--accent-beige-hover);
    text-decoration: underline;
}

/* Toast de notificação */
.toast-box {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #1e1f24;
    border: 1px solid var(--border-light);
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
    z-index: 999;
}

.toast-box.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-box i {
    color: #4ade80;
    font-size: 1.1rem;
}

.toast-box span {
    font-size: 0.82rem;
    font-weight: 500;
}

.hidden {
    display: none !important;
}

/* Responsividade Desktop */
@media (min-width: 640px) {
    body {
        padding: 36px 20px 40px;
    }

    .hero-block h1 {
        font-size: 2.1rem;
    }

    .input-form {
        flex-direction: row;
    }

    .field-box {
        flex: 1;
    }

    .btn-primary-action {
        min-width: 130px;
    }

    .result-box:not(.is-carousel) {
        flex-direction: row;
        align-items: center;
        padding: 18px;
    }

    .result-box:not(.is-carousel) .result-cover-box {
        width: 150px;
        aspect-ratio: 9 / 12;
        max-height: 200px;
        flex-shrink: 0;
    }

    .result-box:not(.is-carousel) .download-actions {
        flex-direction: row;
    }

    .result-box:not(.is-carousel) .dl-button {
        flex: 1;
    }

    .result-box.is-carousel {
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
    }

    .carousel-actions-row {
        flex-direction: row;
    }

    .carousel-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }

    .info-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}