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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 100px;
    background-color: #f0f0f0;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    gap: 40px;
}

.logo {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1a1a4d 0%, #2d2d8f 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    font-weight: bold;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    text-decoration: none;
    color: #666;
    transition: all 0.3s ease;
    padding: 10px;
    border-radius: 8px;
}

.nav-item:hover {
    background-color: #e8e8f0;
    color: #333;
}

.nav-item.active {
    background-color: #d0d0e8;
    color: #1a1a4d;
}

.nav-icon {
    font-size: 28px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-label {
    font-size: 12px;
    text-align: center;
    font-weight: 500;
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
}

.header {
    padding: 20px 30px;
    border-bottom: 1px solid #e0e0e0;
    background-color: #fafafa;
}

.header-title {
    font-size: 20px;
    font-weight: 600;
    color: #666;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-title::before {
    content: '◀';
    color: #999;
    font-size: 16px;
}

.content-area {
    flex: 1;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.input-section {
    width: 100%;
    max-width: 600px;
}

.input-label {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
    display: block;
}

.input-box {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background-color: #f9f9f9;
    color: #999;
    transition: all 0.3s ease;
}

.input-box:hover {
    background-color: #ffffff;
    border-color: #ccc;
}

.input-box:focus {
    outline: none;
    border-color: #1a1a4d;
    background-color: #ffffff;
}

.divider {
    width: 100%;
    max-width: 600px;
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 20px 0;
}

.divider-line {
    flex: 1;
    height: 1px;
    background-color: #ddd;
}

.divider-text {
    color: #999;
    font-size: 14px;
    font-weight: 500;
}

.upload-section {
    width: 100%;
    max-width: 600px;
    border: 2px dashed #ddd;
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    background-color: #fafafa;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-section:hover {
    border-color: #1a1a4d;
    background-color: #f0f0f8;
}

.upload-label {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    display: block;
}

.upload-sublabel {
    font-size: 12px;
    color: #999;
}

#uploadInput {
    display: none;
}

.upload-icon {
    font-size: 32px;
    margin-bottom: 10px;
    color: #1a1a4d;
}