* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f0f2f5;
    min-height: 100vh;
    padding: 0;
}

.header {
    background-color: #2c3e50;
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 180px;
    height: auto;
    margin-right: 20px;
}

.nav-menu {
    display: flex;
    gap: 15px;
}

.nav-btn {
    background-color: transparent;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
    text-decoration: none;
    display: inline-block;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-btn.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #2c3e50;
    min-width: 180px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1000;
    border-radius: 4px;
    margin-top: 2px;
}

.dropdown-content a {
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    font-size: 14px;
    transition: background-color 0.3s;
}

.dropdown-content a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown .nav-btn:after {
    content: ' ▼';
    font-size: 10px;
    vertical-align: middle;
}

.logout-option {
    background-color: #e53e3e;
    color: white;
    border-radius: 0 0 4px 4px;
}

.logout-option:hover {
    background-color: #c53030 !important;
}

.main-content {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

h1, h2 {
    text-align: center;
    color: #1a1a1a;
    margin-bottom: 30px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: #2563eb;
}

.instruction-text {
    text-align: center;
    margin-bottom: 20px;
    color: #4b5563;
    font-size: 16px;
}

.document-type-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.type-btn {
    background-color: #2563eb;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 20px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
    text-align: center;
    margin-bottom: 15px;
    width: 100%;
}

.type-btn:hover {
    background-color: #1d4ed8;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    background-color: #f9fafb;
}

select {
    cursor: pointer;
}

select:disabled {
    background-color: #e5e7eb;
    cursor: not-allowed;
}



.submit-btn {
    background-color: #10b981;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 15px 30px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #059669;
}

.back-btn {
    background-color: #6b7280;
    margin-top: 15px;
}

.success-message {
    background-color: #dcfce7;
    color: #166534;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.error-message {
    background-color: #fee2e2;
    color: #b91c1c;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.qrcode {
    width: 150px;
    height: 150px;
    margin: 0 auto;
}

.preview-container {
    margin: 30px auto;
    border: 1px solid #ddd;
    padding: 20px;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 800px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.preview-logo {
    max-width: 300px;
}

.preview-title {
    text-align: center;
    font-size: 24px;
    margin: 40px 0;
}

.preview-info {
    margin: 20px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.preview-info-label {
    font-weight: bold;
}

.document-info {
    margin-top: 30px;
    padding: 20px;
    background-color: #f9fafb;
    border-radius: 8px;
}

.download-btn {
    background-color: #ef4444;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 15px 30px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
    margin-top: 20px;
}

.download-btn:hover {
    background-color: #dc2626;
}

#uploadedPdf {
    width: 100%;
    height: 500px;
    border: 1px solid #ddd;
    margin-top: 20px;
}

.loading-indicator {
    display: none;
    text-align: center;
    margin: 20px 0;
}

.loading-spinner {
    border: 6px solid #f3f3f3;
    border-top: 6px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
    margin: 0 auto 15px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.history-table th, .history-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}

.history-table th {
    background-color: #f0f2f5;
    font-weight: 600;
}

.history-table tr:nth-child(even) {
    background-color: #f9fafb;
}

.history-table tr:hover {
    background-color: #e6f7ff;
}

.revision-actions {
    display: flex;
    gap: 10px;
}

.view-btn, .download-btn-small {
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    border: none;
}

.view-btn {
    background-color: #2563eb;
    color: white;
}

.download-btn-small {
    background-color: #10b981;
    color: white;
}

.filter-container {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    align-items: center;
}

.filter-label {
    font-weight: bold;
    min-width: 80px;
}

.filter-input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.new-revision-btn {
    background-color: #ef4444;
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-left: auto;
}

.footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

#partForm, #asmForm, #isoForm, #documentPreview {
    display: none;
}