:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #1abc9c;
    --bg-color: #f5f7fa;
    --text-color: #333;
    --card-bg: #ffffff;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
}

.user-info {
    position: absolute;
    right: 2rem;
    top: 2rem;
    font-size: 0.9rem;
}

.user-info a {
    color: #ff9999;
    text-decoration: none;
    margin-left: 10px;
    font-weight: bold;
}

header h1 { font-size: 1.8rem; margin-bottom: 0.3rem; }
header h2 { font-size: 1.2rem; font-weight: 300; opacity: 0.9; }

.container { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; }

.screen {
    display: none;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.screen.active { display: block; }

/* Login e Cadastro Cards */
.login-card { max-width: 400px; margin: 2rem auto; text-align: center; }
.login-card h3 { margin-bottom: 1.5rem; color: var(--primary-color); }

.alert-danger { color: var(--danger-color); background: #fde8e8; padding: 0.8rem; border-radius: 4px; margin-bottom: 1rem; font-size: 0.9rem; text-align: left;}
.alert-success { color: #27ae60; background: #e8f8f5; padding: 0.8rem; border-radius: 4px; margin-bottom: 1rem; font-size: 0.9rem; text-align: left;}
.alert-warning { color: #d35400; background: #fef5e7; padding: 0.8rem; border-radius: 4px; margin-bottom: 1rem; font-size: 0.9rem; text-align: left;}

.form-group { margin-bottom: 1.2rem; text-align: left; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; font-size: 0.9rem; }
.form-group input { width: 100%; padding: 0.8rem; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; }

/* Banner Rotativo */
.carousel-container {
    position: relative;
    width: 100%;
    height: 350px;
    margin-bottom: 2rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.carousel-slide { display: none; width: 100%; height: 100%; position: relative; }
.carousel-slide.active { display: block; }
.carousel-slide img { width: 100%; height: 100%; object-fit: cover; }
.carousel-caption { position: absolute; bottom: 0; background: rgba(0, 0, 0, 0.6); color: white; width: 100%; padding: 1rem; text-align: center; font-weight: bold; }

/* Botões */
.btn-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; margin: 2rem 0; }
.btn { background-color: var(--secondary-color); color: white; border: none; padding: 1rem 1.5rem; font-size: 1rem; font-weight: 600; border-radius: 6px; cursor: pointer; transition: background 0.2s, transform 0.1s; text-align: center; text-decoration: none; display: inline-block;}
.btn:hover { background-color: #2980b9; transform: translateY(-2px); }

.btn-secondary { background-color: #7f8c8d; margin-top: 10px; }
.btn-secondary:hover { background-color: #95a5a6; }
.btn-admin-panel { background-color: #8e44ad; }
.btn-admin-panel:hover { background-color: #9b59b6; }
.btn-nav-container { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; border-bottom: 2px solid #eee; padding-bottom: 1rem; }
.btn-back { background-color: var(--danger-color); }
.btn-back:hover { background-color: #c0392b; }
.btn-add { background-color: var(--accent-color); padding: 0.5rem 1rem; font-size: 0.9rem; margin-top: 0.5rem; }

/* Tabela Admin */
.admin-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
.admin-table th, .admin-table td { padding: 12px; border: 1px solid #ddd; text-align: left; }
.admin-table th { background-color: var(--primary-color); color: white; }
.badge { padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: bold; }
.badge-pendente { background-color: var(--warning-color); color: white; }
.badge-aprovado { background-color: var(--accent-color); color: white; }
.badge-recusado { background-color: var(--danger-color); color: white; }

.btn-action { padding: 4px 10px; font-size: 0.85rem; margin-right: 5px; border-radius: 4px; border: none; color: white; cursor: pointer; }
.btn-approve { background-color: #2ecc71; }
.btn-reject { background-color: var(--danger-color); }

/* Formulários de Bimestres */
.bimestre-section { background: #fdfdfd; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.5rem; margin-bottom: 1.5rem; }
.bimestre-title { color: var(--primary-color); border-left: 4px solid var(--secondary-color); padding-left: 0.5rem; margin-bottom: 1rem; font-size: 1.2rem; }
.entry-row { background: white; border: 1px solid #edf2f7; padding: 1rem; border-radius: 4px; margin-bottom: 0.8rem; }
.grid-inputs { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 0.5rem; }

@media (max-width: 600px) {
    .carousel-container { height: 200px; }
    .btn-nav-container { flex-direction: column; gap: 1rem; align-items: flex-start; }
    .user-info { position: static; text-align: center; margin-top: 1rem; }
}