:root {
    --primary-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 600;
    --line-height: 1.5;
    --letter-spacing: 0.2px;
}

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

body {
    font-family: var(--primary-font);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
    background-color: #f0f2f5;
    color: #333;
    overflow-x: auto;
    min-width: 800px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.container {
    display: flex;
    height: 100vh;
    min-width: 800px;
}

.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    transition: width 0.3s ease, transform 0.3s ease;
    overflow: visible;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #34495e;
    padding: 18px 15px;
    border-bottom: 1px solid #34495e;
    height: 60px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    transition: all 0.3s ease;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #3498db, #2ecc71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
}

.sidebar-toggle {
    width: 28px;
    height: 28px;
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.3s ease;
}

.sidebar-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.nav-menu {
    flex: 1;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
}

.nav-item {
    padding: 10px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    font-family: var(--primary-font);
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
    display: block;
    position: relative;
}

.nav-item-content {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 40px;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 18px;
}

.nav-item:hover {
    background-color: #34495e;
    border-left-color: #3498db;
}

.nav-item.active {
    background-color: #34495e;
    border-left-color: #3498db;
}

.sub-menu {
    background-color: #34495e;
    padding-left: 24px;
    display: none;
}

.sub-menu.show {
    display: block;
}

.sub-item {
    padding: 10px 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--primary-font);
    font-size: 15px;
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height);
    letter-spacing: var(--letter-spacing);
    display: flex;
    align-items: center;
    gap: 12px;
    height: 45px;
}

.sub-item i {
    width: 20px;
    text-align: center;
    font-size: 17px;
}

.sub-item:hover {
    background-color: #4a637b;
}

.main-content {
            flex: 1;
            padding: 20px;
            overflow-y: auto;
            transition: padding-left 0.3s ease;
        }

.sidebar.collapsed ~ .main-content {
    padding-left: 20px;
}

@media (min-width: 769px) {
    .sidebar.collapsed {
        width: 60px;
    }
    
    .sidebar.collapsed .sidebar-header {
        padding: 18px 15px;
        justify-content: center;
    }
    
    .sidebar.collapsed .logo {
        opacity: 0;
        width: 0;
        overflow: hidden;
    }
    
    .sidebar.collapsed .sidebar-toggle i {
        transform: rotate(180deg);
    }
    
    .sidebar.collapsed .nav-menu {
        padding: 5px 0;
        flex: none;
    }
    
    .sidebar.collapsed .nav-item {
        padding: 10px 0;
        margin: 0;
        width: 100%;
        box-sizing: border-box;
        text-align: center;
    }
    
    .sidebar.collapsed .nav-item-content {
        overflow: visible;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
    }
    
    .sidebar.collapsed .nav-item-content span {
        opacity: 0;
        width: 0;
        overflow: hidden;
        transition: all 0.3s ease;
    }
    
    .sidebar.collapsed .nav-item {
        position: relative;
        height: 45px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .sidebar.collapsed .nav-item.hidden {
        display: none !important;
    }
    
    .sidebar.collapsed .sub-menu {
        display: none;
        position: fixed;
        left: 60px;
        top: 0;
        background-color: #34495e;
        border-radius: 0 5px 5px 0;
        box-shadow: 2px 0 10px rgba(0,0,0,0.3);
        z-index: 9999;
        min-width: 180px;
        margin-top: 0;
        padding: 10px 0;
        overflow: visible;
    }
    
    .sidebar.collapsed .sub-menu.show {
        display: block !important;
    }
    
    .sidebar.collapsed .sub-item {
        padding: 10px 20px;
        white-space: nowrap;
    }
    
    .sidebar.collapsed .sub-item:hover {
        background-color: #2c3e50;
    }
    
    .sidebar.collapsed .sub-item span {
        opacity: 1;
        width: auto;
        display: inline-block;
        margin-left: 10px;
    }
}

@media (max-width: 768px) {
    body {
        min-width: auto;
        overflow-x: hidden;
    }
    
    .container {
        min-width: auto;
        flex-direction: row;
        position: relative;
    }
    
    .sidebar {
        width: 200px;
        height: 100vh;
        position: fixed;
        left: 0;
        top: 0;
        z-index: 1000;
        overflow-y: auto;
        overflow-x: visible;
        transition: width 0.3s ease;
    }
    
    .sidebar.collapsed {
        width: 60px;
        overflow-y: auto;
        overflow-x: visible;
    }
    
    .nav-menu {
        max-height: none;
        overflow: visible;
        transition: none;
    }
    
    .sidebar.collapsed .nav-menu {
        max-height: none;
        overflow: visible;
    }
    
    .sidebar.collapsed .logo {
        opacity: 0;
        width: 0;
        overflow: hidden;
    }
    
    .sidebar.collapsed .sidebar-toggle i {
        transform: rotate(180deg);
    }
    
    .sidebar.collapsed .nav-menu {
        padding: 5px 0;
        flex: none;
    }
    
    .sidebar.collapsed .nav-item {
        padding: 10px 0;
        margin: 0;
        width: 100%;
        box-sizing: border-box;
        text-align: center;
        position: relative;
        height: 45px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .sidebar.collapsed .nav-item.hidden {
        display: none !important;
    }
    
    .sidebar.collapsed .nav-item-content {
        overflow: visible;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
    }
    
    .sidebar.collapsed .nav-item-content span,
    .sidebar.collapsed .sub-item span {
        opacity: 0;
        width: 0;
        overflow: hidden;
        transition: all 0.3s ease;
        display: inline-block;
        margin-left: 0;
    }
    
    .sidebar.collapsed .sub-menu {
        display: none;
        position: fixed;
        left: 60px;
        top: 0;
        background-color: #34495e;
        border-radius: 0 5px 5px 0;
        box-shadow: 2px 0 10px rgba(0,0,0,0.3);
        z-index: 9999;
        min-width: 180px;
        margin-top: 0;
        padding: 10px 0;
        overflow: visible;
    }
    
    .sidebar.collapsed .sub-menu.show {
        display: block !important;
    }
    
    .sidebar.collapsed .sub-item {
        padding: 10px 20px;
        white-space: nowrap;
    }
    
    .sidebar.collapsed .sub-item:hover {
        background-color: #2c3e50;
    }
    
    .sidebar.collapsed .sub-item span {
        opacity: 1;
        width: auto;
        display: inline-block;
        margin-left: 10px;
    }
    
    .main-content {
        padding: 10px;
        margin-left: 200px;
        transition: margin-left 0.3s ease;
        width: calc(100% - 200px);
    }
    
    .sidebar.collapsed ~ .main-content {
        margin-left: 60px;
        width: calc(100% - 60px);
    }
    
    .nav-item {
        padding: 12px 15px;
    }
    
    .sub-item {
        padding: 10px 25px;
    }
}

.content-body {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.hidden {
    display: none;
}

.popup-message {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translate(-50%, 0);
    padding: 20px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.popup-message.show {
    opacity: 1;
}

.popup-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.popup-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.form-group {
    display: flex;
    flex-direction: row;
    gap: 10px;
    align-items: center;
    justify-content: flex-start;
    flex-grow: 1;
    flex-shrink: 1;
    margin: 0;
    max-width: 100%;
}

.form-group label {
    font-weight: 600;
    color: #444;
    min-width: 60px;
    white-space: nowrap;
    font-size: 14px;
    line-height: 36px;
    vertical-align: middle;
    margin: 0;
}

.form-group input,
.form-group select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 14px;
    width: 100%;
    max-width: 200px;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
    height: 36px;
    line-height: 18px;
    vertical-align: middle;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
}

.form-group button {
    padding: 0 20px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    width: auto;
    max-width: 100%;
    box-sizing: border-box;
    transition: background-color 0.3s ease;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-group button:hover {
    background-color: #2980b9;
}

@media (max-width: 1024px) {
    .form-group {
        gap: 8px;
    }
}

.form-group:has(button) label {
    display: none;
}

.form-group:has(button) {
    flex-grow: 0;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .form-group {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        margin-bottom: 10px;
    }
    
    .form-group label {
        min-width: auto;
        width: 100%;
    }
    
    .form-group input,
    .form-group select {
        width: 100%;
        max-width: 100%;
    }
    
    .form-group button {
        width: auto;
        max-width: auto;
    }
    
    .form-group:has(button) {
        margin-bottom: 0;
    }
}