html {
    font-size: 14px;
    position: relative;
    min-height: 100%;
}

body {
    font-family: Arial, sans-serif;
    background-color: #ffffff;
    margin-bottom: 60px;
    /* margin-top: 72px; ajuste para header fixo */
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

a:focus {
    outline: 2px solid #007BFF;
    outline-offset: 2px;
}

.navbar {
    border-bottom: 3px solid #007BFF;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255,255,255,.5) !important;
}

.btn-link.text-white:hover {
    color: #007BFF !important;
}

.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
}

@media (min-width: 992px) {
    .navbar {
        padding-left: 20px;
        padding-right: 20px;
    }
}

section.container, section.text-center {
    padding: 60px 0;
}

img.img-fluid {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.btn {
    border-radius: 50px;
    font-weight: 500;
    padding: 10px 24px;
}

.btn-primary {
    background-color: #007BFF;
    border: none;
}

.btn-outline-primary {
    color: #007BFF;
    border-color: #007BFF;
}

.btn-primary:hover, .btn-outline-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.scoreboard {
    border: 2px solid #007BFF;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    border-radius: 5px;
    background-color: #f8f9fa;
}

.scoreboard h5 {
    margin-bottom: 10px;
}

.btn.selected, .guessNote.selected, .guessQuality.selected {
    border-color: blue !important;
    background-color: rgba(0, 0, 255, 0.1) !important;
}

.exercise-link {
    display: block;
    padding: 15px 0;
    font-size: 1.2em;
    transition: background-color 0.2s, color 0.2s;
    color: #007BFF;
}

.exercise-link:hover, .exercise-link:focus {
    background-color: #f8f9fa;
    color: #0056b3;
    text-decoration: none;
}

.dl-language {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.8);
    white-space: nowrap;
    background: transparent;
}

.dl-language option {
    color: black;
}

.dl-language img.flag-icon {
    margin-right: 8px;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    padding: 8px 16px;
}

.dropdown-menu a img.flag-icon {
    margin-right: 8px;
}

.hidden {
    display: none !important;
}

/* Estilo para cards modernos */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    transition: 0.2s ease-in-out;
}

.card-title {
    font-weight: bold;
}


/* Estilo base para gráficos */
canvas {
    background-color: #fff;
    border-radius: 12px;
    padding: 10px;
}

/* Botões de acesso rápido no dashboard */
.quick-access-btn {
    font-size: 1rem;
    border-radius: 30px;
    padding: 10px 24px;
    transition: all 0.2s ease;
    color: #007BFF;
    border: 2px solid #007BFF;
    background-color: #fff;
}

.quick-access-btn:hover {
    background-color: #007BFF;
    color: #fff;
}

/* Modo claro/escuro (opcional futuro) */
body.light-mode {
    background-color: #ffffff;
    color: #000000;
}

body.dark-mode {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark-mode .card {
    background-color: #1e1e1e;
    color: #e0e0e0;
}

/* Animações nos botões de resposta */
.guessNote, .guessQuality {
    transition: all 0.15s ease;
}

.guessNote:hover, .guessQuality:hover {
    background-color: rgba(0, 0, 255, 0.05);
    cursor: pointer;
}


/* NOVA AREA DE CSS */
/* Layout da tela de exercício */
.exercise-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.exercise-title {
    font-size: 1.8rem;
    font-weight: bold;
}

.exercise-instruction {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: #333;
}

/* Botões de áudio (play/pause/replay) */
.audio-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.audio-controls .btn {
    width: 60px;
    height: 60px;
    font-size: 1.2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Container dos botões de resposta */
.answer-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.answer-buttons .btn {
    min-width: 70px;
    font-size: 1rem;
    padding: 10px 18px;
}

/* Waveform */
#waveform {
    width: 100%;
    height: 100px;
    background-color: #f2f2f2;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

/* Feedback visual */
.feedback-success {
    border-left: 5px solid #28a745;
    background-color: #eaf8ef;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1.5rem;
}

.feedback-error {
    border-left: 5px solid #dc3545;
    background-color: #fdeaea;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1.5rem;
}

/* Área de ajuda */
#helpAccordion {
    margin-top: 2rem;
}

/* Sidebar badges */
.badge-group .badge {
    margin-right: 0.4rem;
    margin-bottom: 0.4rem;
}

.answer-buttons .btn {
    padding: 12px 24px;
    font-size: 1.1rem;
    border-radius: 12px;
    min-width: 150px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: all 0.2s ease;
}

.answer-buttons .btn:hover {
    background-color: #f8f9fa;
    transform: translateY(-1px);
}

.btn.rounded-circle {
    width: 60px;
    height: 60px;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flag-icon {
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    object-fit: cover;
}