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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Login Page */
.container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: #333;
    margin-bottom: 10px;
    text-align: center;
}

.subtitle {
    color: #666;
    text-align: center;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.error-message {
    color: #e74c3c;
    font-size: 14px;
    margin-bottom: 15px;
    min-height: 20px;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-success, .btn-small, .btn-danger {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.btn-success:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
    background: #3498db;
    color: white;
}

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

.btn-danger {
    background: #e74c3c;
}

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

/* Dashboard */
.dashboard {
    min-height: 100vh;
    background: #f5f6fa;
}

.dashboard-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
}

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

.header-content h1 {
    color: #333;
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    color: #666;
    font-weight: 500;
}

.dashboard-main {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.upload-section, .files-section {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.upload-section h2, .files-section h2 {
    color: #333;
    margin-bottom: 20px;
}

.upload-area {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

#fileName {
    color: #666;
    flex: 1;
    min-width: 200px;
}

.status-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 5px;
    font-weight: 500;
}

.status-message.success {
    background: #d4edda;
    color: #155724;
}

.status-message.error {
    background: #f8d7da;
    color: #721c24;
}

/* Files List */
.files-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    border: 1px solid #e9ecef;
}

.file-info {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #333;
    min-width: 200px;
}

.file-size, .file-date {
    color: #666;
    font-size: 14px;
}

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

.loading, .no-files, .error {
    text-align: center;
    padding: 40px;
    color: #666;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .file-actions {
        width: 100%;
    }

    .file-actions button {
        flex: 1;
    }

    .upload-area {
        flex-direction: column;
        align-items: stretch;
    }

    #fileName {
        min-width: auto;
    }
}