:root {
    /* Color palette */
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --secondary-color: #2196F3;
    --secondary-dark: #1976D2;
    --accent-color: #FF4081;
    --background-color: #f4f4f4;
    --surface-color: #ffffff;
    --error-color: #f44336;
    --error-dark: #d32f2f;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --warning-dark: #e68a00;
    --sidebar-bg: #333;
    --sidebar-hover: #555;
    
    /* Text colors */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.1);
}

/* Base styles */
body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 10px;
    background-color: var(--background-color);
    color: var(--text-primary);
}

/* Header styles */
header {
    background-color: var(--surface-color);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
    transition: margin-left .5s;
    margin-left: 60px;
}

header .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    justify-content: space-between;
}

header h1 {
    position: static;
    transform: none;
    margin: 0;
    width: max-content;
    font-weight: 700;
    font-size: 3rem;
    letter-spacing: 1px;
    color: var(--text-primary);
    text-align: center;
}

.logo {
    max-width: 155px;
    height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    margin-left: var(--spacing-sm);
}

h1 {
    margin-left: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Flash messages */
.flash-messages {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-lg);
}

.flash-message {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background-color: var(--warning-color);
    color: var(--text-light);
    animation: fadeinout 9.5s linear forwards;
}
  
@keyframes fadeinout {
    0%,100% { opacity: 0; }
    15%,80% { opacity: 1; }
}

.error {
    background-color: var(--error-color);
    color: var(--text-light);
}

.success {
    background-color: var(--success-color);
    color: var(--text-light);
}

.warning {
    background-color: var(--warning-color);
    color: var(--text-light);
}

.container {
    max-width: 90%;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.main-container {
    width: 60%;
    margin: 0 auto;
}

.flex-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.flex-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: 10px auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    align-items: space-between;
    width: 100%;
}

.form-item {
    /* width: 100%; */
    display: flex;
    flex-direction: column;
    /* align-items: flex-start; */
    margin: 10px 0;
}

.form-item input {
    flex: 1 0 auto;
    box-sizing: border-box;
}

form select {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
}

form input {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
}

.data-table {
    border-collapse: collapse;
    max-width: 100%;
    margin: 20px auto;
    overflow: scroll;
}
.data-table th, .data-table td {
    border: 1px solid #ddd;
    padding: 8px;
}
.data-table th {
    background-color: var(--primary-color);
    color: var(--text-light);
    text-align: center;
    font-size: 16px;
}

.data-table td {
    font-size: 14px;
    text-align: left;
}

.data-table tr:nth-child(even) {
    background-color: #f9f9f9;
}
.data-table tr:hover {
    background-color: #ddd;
}

.data-table table {
    margin: 0 auto;
}

.data-table tr.selected-row {
    background-color: #ffabab;
}

.buttons-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.buttons-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.buttons-row .btn, .buttons-column .btn {
    flex: 1 0 auto;
    box-sizing: border-box;
}

.buttons-column .btn {
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 1rem;
    text-align: center;
    /* width: 90%; */
}

.btn:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
}

.btn-danger {
    background-color: var(--error-color);
}

.btn-danger:hover {
    background-color: var(--error-dark);
}

.btn-warning {
    background-color: var(--warning-color);
}

.btn-warning:hover {
    background-color: var(--warning-dark);
}


/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

/* Card Grid */
/* .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, 300px);
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
} */

.card-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.secondary-card {
    flex: 0 0 300px;
    background-color: #f5f5f5;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-sm);
    /* min-height: 350px; */
    width: 100%;
    overflow: auto;
}

.secondary-card:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.secondary-card h5 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.secondary-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.secondary-card small {
    font-size: 0.8rem;
    margin-bottom: var(--spacing-sm);
}

.secondary-card .btn {
    width: 85%;
    margin-top: auto;
    margin-bottom: var(--spacing-sm);
}

/* Grid system */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* Sidebar */
.sidebar {
    height: 100%;
    width: 60px; /* Default collapsed width */
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: var(--sidebar-bg);
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 20px;
}

.sidebar.expanded {
    width: 250px; /* Width when expanded */
}

.sidebar a {
    padding: 8px 8px 8px 20px; /* Adjusted padding */
    text-decoration: none;
    font-size: 18px;
    color: var(--text-light);
    display: block;
    transition: 0.3s;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar p {
    padding: 8px 8px 8px 20px;
    text-decoration: none;
    font-size: 18px;
    color: var(--text-light);
    display: block;
    transition: 0.3s;
    overflow: hidden;
    white-space: nowrap;
    margin: 0
}

.sidebar a:hover {
    background-color: var(--sidebar-hover);
}

.sidebar i {
    width: 20px;
    text-align: center;
    margin-right: 10px;
}

.sidebar span {
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar.expanded span {
    opacity: 1;
}

.sidebar a#toggle_btn i {
    transition: transform 0.3s;
}


.sidebar a#contato {
    position: absolute;  
    bottom: 36px;
    width: 100%;
    left: 0; 
}

.openbtn {
    left: 65px; /* Adjust position to account for always-visible sidebar */
}

main {
    transition: margin-left .5s;
    padding: 20px;
    margin-left: 60px;
}

footer {
    transition: margin .5s;
    /* max-width: 80%; */
    padding: 15px;
    text-align: center;
    margin-left: 60px;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    header, main, footer {
        margin-left: 50px;
    }

    .logo {
        max-width: 90px;
    }

    header h1 {
        font-size: 1.5rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }

    .sidebar a, .sidebar p, .sidebar button {
        font-size: 14px;
        white-space: wrap;
    }

    .openbtn {
        font-size: 16px;
    }

    .sidebar .closebtn {
        right: 12px;
        padding: 6px 12px;
    }

    input[type="file"] {
        max-width: 90%;
    }

    .sidebar {
        width: 50px;
    }
    
    .sidebar.expanded {
        width: 150px;
    }

    footer {
        margin: 0 auto; /* Adjust for smaller sidebar on mobile */
    }

    .card-grid {
        grid-template-columns: repeat(auto-fill, 250px);
        gap: var(--spacing-md);
    }

    .secondary-card {
        flex: 0 0 250px;
    }

    .secondary-card p {
        font-size: 0.8rem;
    }

    .secondary-card small {
        font-size: 0.75rem;
    }
}