/* VARIAVEIS GLOBAIS */
:root {
    --bg-dark: #121212;
    --bg-surface: #1e1e1e;
    --bg-surface-hover: #2a2a2a;
    --border-color: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --primary-accent: #00bcd4;
    --primary-accent-hover: #00dcf4;
    --success: #4caf50;
    --warning: #ffc107;
    --danger: #f44336;
    --font-main: 'Inter', sans-serif;
    --font-code: 'Source Code Pro', monospace;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

/* LAYOUT PRINCIPAL */
.view {
    display: none;
    width: 100%;
    min-height: 100vh;
}

.view--active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.main-view {
    display: none;
    width: 100%;
}

.main-view--active {
    display: block;
}

/* TELA DE AUTENTICAÇÃO */
#auth-view {
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    background-color: var(--bg-surface);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.auth-container__title {
    text-align: center;
    color: var(--primary-accent);
    margin-bottom: 0.5rem;
}

.auth-container__subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.auth-container__switch {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.auth-container__switch a {
    color: var(--primary-accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s, text-decoration 0.2s;
}

.auth-container__switch a:hover {
    color: var(--primary-accent-hover);
    text-decoration: underline;
}

.auth-container__guest-link {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.6rem 1rem;
    background-color: var(--bg-surface-hover);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

/* COMPONENTES GERAIS */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group--center {
    text-align: center;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.2);
}

.form-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn--primary { background-color: var(--primary-accent); color: var(--bg-dark); }
.btn--primary:hover { background-color: var(--primary-accent-hover); }
.btn--secondary { background-color: var(--bg-surface-hover); color: var(--text-primary); }
.btn--secondary:hover { background-color: var(--border-color); }
.btn--success { background-color: var(--success); color: white; }
.btn--warning { background-color: var(--warning); color: var(--bg-dark); }
.btn--danger { background-color: var(--danger); color: white; }

.message {
    padding: 0.75rem;
    margin-top: 1.5rem;
    border-radius: 4px;
    text-align: center;
    transition: opacity 0.3s ease;
}

.message--error {
    color: var(--danger);
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--danger);
}

/* APLICAÇÃO PRINCIPAL */
.app-header {
    width: 100%;
    padding: 1rem 2rem;
    background-color: var(--bg-surface);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.app-header__title {
    font-size: 1.5rem;
    color: var(--primary-accent);
}

#main-content {
    width: 100%;
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.view-header__actions {
    display: flex;
    gap: 1rem;
}

/* TELA DE LISTA DE BARALHOS */
.deck-list__item {
    background-color: var(--bg-surface);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.deck-list__study-link {
    cursor: pointer;
    transition: color 0.2s;
}
.deck-list__study-link:hover {
    color: var(--primary-accent);
}

.deck-list__item-stats {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.deck-list__config-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}
.deck-list__config-btn:hover {
    color: var(--text-primary);
}


/* TELA DE LISTA DE CARDS */
.card-list-item {
    background-color: var(--bg-surface);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1rem;
    align-items: center;
}

.card-list-item__content {
    border-right: 1px solid var(--border-color);
    padding-right: 1rem;
    overflow: hidden;
}
.card-list-item__content:last-of-type {
    border-right: none;
    padding-right: 0;
}

.card-list-item__actions {
    display: flex;
    gap: 0.5rem;
}

.card-list-item__actions .btn {
    padding: 0.4rem 0.8rem;
}

/* TELA DE ESTUDO */
.study-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    margin-bottom: 2rem;
}

.study-card__face {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.study-card__label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.study-card__content {
    font-size: 1.5rem;
}

.study-card__separator {
    width: 100%;
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1rem 0;
}

.study-actions {
    display: flex;
    justify-content: center;
    align-items: center;
}

#grade-buttons {
    display: flex;
    gap: 1rem;
}

/* TELA DE ADICIONAR CARD */
.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-nav__button {
    padding: 1rem 1.5rem;
    cursor: pointer;
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1rem;
}

.tab-nav__button--active {
    color: var(--primary-accent);
    border-bottom-color: var(--primary-accent);
}

.tab-content { display: none; }
.tab-content--active { display: block; }

/* BANNER DE VISITANTE */
.guest-banner {
    background-color: var(--warning);
    color: var(--bg-dark);
    text-align: center;
    padding: 0.5rem;
    font-weight: 500;
}

.guest-banner a {
    color: var(--bg-dark);
    font-weight: 700;
}

/* CONTEÚDO MARKDOWN */
.study-card__content code, .card-list-item__content code {
    font-family: var(--font-code);
    background-color: var(--bg-dark);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.study-card__content pre, .card-list-item__content pre {
    background-color: var(--bg-dark);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    text-align: left;
}

/* MODAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-surface);
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border-color);
}