:root {
    --primary-color: #2ecc71; /* Verde */
    --secondary-color: #3498db; /* Azul */
    --dark-color: #2c3e50; /* Preto/Cinza Escuro */
    --light-color: #ecf0f1;
    --danger-color: #e74c3c;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light-color);
    color: var(--dark-color);
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* Auth Card */
.auth-card {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 5px;
}

.logo span {
    color: var(--primary-color);
}

.subtitle {
    color: #7f8c8d;
    margin-bottom: 30px;
}

.tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--light-color);
}

.tabs button {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 600;
    color: #7f8c8d;
    transition: 0.3s;
}

.tabs button.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.form-group {
    text-align: left;
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    outline: none;
    transition: 0.3s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--primary-color);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

.btn-primary:hover {
    background-color: #27ae60;
}

.btn-secondary {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 15px;
}

.hidden {
    display: none;
}

.message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.9rem;
}

.message.error {
    background-color: #fdeaea;
    color: var(--danger-color);
}

.message.success {
    background-color: #eafaf1;
    color: var(--primary-color);
}

/* Dashboard */
.navbar {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-container .logo {
    color: var(--white);
    font-size: 1.8rem;
}

.btn-logout {
    background: none;
    border: 1px solid var(--white);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 15px;
}

.dashboard-container {
    max-width: 1200px;
    margin: 30px auto;
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    padding: 0 20px;
}

.sidebar {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    height: fit-content;
}

.nav-item {
    display: block;
    width: 100%;
    text-align: left;
    padding: 12px 15px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 6px;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--dark-color);
}

.nav-item.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.content {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    min-height: 500px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    background: var(--light-color);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    border-left: 5px solid var(--primary-color);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 10px 0;
}

.stat-label {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.recompensas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.recompensa-card {
    border: 1px solid #ddd;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    transition: 0.3s;
}

.recompensa-card:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.recompensa-card h3 {
    margin-bottom: 10px;
}

.recompensa-card p {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.recompensa-card .pontos {
    display: block;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: var(--light-color);
}

.item-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 10px;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 6px;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    background: var(--dark-color);
    color: var(--white);
    border-radius: 6px;
    display: none;
    z-index: 1000;
}
/* --- AJUSTES PARA CELULAR (MOBILE) --- */
@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
        gap: 10px;
        margin: 0;
        padding: 10px;
    }

    /* Estilização da Sidebar como Menu Superior */
    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr); /* 2 botões por linha */
        gap: 8px;
        padding: 10px;
        background: #f8f9fa;
        border-radius: 12px;
        margin-bottom: 15px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .nav-item {
        margin-bottom: 0;
        padding: 12px 8px;
        font-size: 0.85rem;
        text-align: center; /* Centraliza o texto no botão */
        border: 1px solid #eee;
        background: white;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: 0.2s;
    }

    .nav-item.active {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        box-shadow: 0 4px 8px rgba(46, 204, 113, 0.2);
    }

    /* Ajustes de Conteúdo */
    .content {
        padding: 20px 15px;
        border-radius: 12px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-value {
        font-size: 2.2rem;
    }

    /* Ajuste do Formulário de Descarte */
    .item-row {
        grid-template-columns: 1fr;
        padding: 15px;
        border: 1px solid #eee;
    }

    /* Ajuste das Recompensas */
    .recompensas-grid {
        grid-template-columns: 1fr;
    }

    /* Ajuste da Tabela de Histórico */
    .table-container {
        margin-top: 15px;
        border-radius: 8px;
        overflow: hidden;
    }

    table {
        font-size: 0.75rem;
    }

    th, td {
        padding: 10px 5px;
    }
}