/* Variabili e reset */
:root {
    --primary-color: #3a6ea5;
    --primary-light: #4d83bc;
    --primary-dark: #315d8c;
    --text-color: #333;
    --light-gray: #f5f7fa;
    --medium-gray: #e0e4e9;
    --dark-gray: #6c757d;
    --danger: #dc3545;
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --white: #ffffff;
    --sidebar-width: 250px;
    --header-height: 60px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

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

body {
    background-color: var(--light-gray);
    color: var(--text-color);
    min-height: 100vh;
}

/* Admin layout */
.admin-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--white);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--medium-gray);
}

.sidebar-header h3 {
    color: var(--primary-color);
}

.sidebar-nav {
    flex-grow: 1;
    padding: 20px 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 5px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-nav a i {
    margin-right: 12px;
    color: var(--dark-gray);
    width: 20px;
    text-align: center;
}

.sidebar-nav li.active a {
    background-color: rgba(58, 110, 165, 0.1);
    color: var(--primary-color);
    border-left: 3px solid var(--primary-color);
}

.sidebar-nav li.active a i {
    color: var(--primary-color);
}

.sidebar-nav a:hover {
    background-color: rgba(58, 110, 165, 0.05);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--medium-gray);
}

.logout-btn {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background-color: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.logout-btn i {
    margin-right: 10px;
}

.logout-btn:hover {
    background-color: var(--danger);
    color: var(--white);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
}

.content-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    border-bottom: 1px solid var(--medium-gray);
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.content-header h2 {
    color: var(--primary-color);
}

.user-info {
    display: flex;
    align-items: center;
}

.user-info span {
    margin-right: 10px;
    font-weight: 500;
}

.user-info i {
    font-size: 20px;
    color: var(--primary-color);
}

.content-area {
    padding: 30px;
}

/* Page content */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Card Components */
.card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--medium-gray);
}

.card-header h3 {
    margin-bottom: 8px;
    color: var(--text-color);
}

.card-header p {
    color: var(--dark-gray);
    font-size: 14px;
}

.card-body {
    padding: 25px;
}

/* Form elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group textarea {
    width: 100%;
    min-height: 200px;
    padding: 12px 15px;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    line-height: 1.5;
    resize: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(58, 110, 165, 0.15);
    outline: none;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
}

.primary-btn {
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.primary-btn:disabled {
    background-color: var(--medium-gray);
    cursor: not-allowed;
}

/* Messages */
.message {
    margin-top: 15px;
    padding: 10px 0;
    font-size: 14px;
    min-height: 20px;
}

.message.success {
    color: var(--success);
}

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

.message.info {
    color: var(--info);
}

.message.warning {
    color: var(--warning);
}

/* Responsive design */
@media (max-width: 992px) {
    .sidebar {
        width: 70px;
        overflow: hidden;
    }

    .sidebar-header h3 {
        display: none;
    }

    .sidebar-nav a span {
        display: none;
    }

    .sidebar-nav a i {
        margin-right: 0;
        font-size: 18px;
    }

    .logout-btn span {
        display: none;
    }

    .logout-btn i {
        margin-right: 0;
    }

    .main-content {
        margin-left: 70px;
        width: calc(100% - 70px);
    }
}

@media (max-width: 768px) {
    .content-header {
        padding: 0 15px;
    }

    .content-area {
        padding: 15px;
    }

    .card-header, .card-body {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 0;
        display: none;
    }

    .main-content {
        margin-left: 0;
        width: 100%;
    }
}