body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
}

.settings-container {
    max-width: 900px;
    margin: 0 auto;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.settings-header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.back-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(-5px);
}

.settings-title {
    margin: 0;
    font-size: 1.8em;
    flex: 1;
}

.result-message {
    margin: 20px 30px 0;
    padding: 15px 20px;
    border-radius: 8px;
    display: none;
    font-weight: 500;
}

.result-message.show {
    display: block;
}

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

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

.settings-content {
    padding: 30px;
}

.loading-state {
    text-align: center;
    padding: 50px 20px;
    color: #666;
    font-size: 16px;
}

.loading-state.hidden {
    display: none;
}

.loading-state i {
    margin-left: 10px;
    font-size: 20px;
    color: #007bff;
}

.settings-form.hidden {
    display: none;
}

.settings-section {
    margin-bottom: 35px;
    padding-bottom: 30px;
    border-bottom: 2px solid #f0f2f5;
}

.settings-section:last-of-type {
    border-bottom: none;
}

.section-title {
    font-size: 1.4em;
    color: #007bff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    font-size: 1.2em;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 15px center;
    padding-left: 40px;
}

.settings-actions {
    margin-top: 40px;
    text-align: center;
}

.save-btn {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border: none;
    padding: 15px 50px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.save-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.save-btn:active:not(:disabled) {
    transform: translateY(0);
}

.save-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Logo Upload Styles */
.logo-upload-container {
    border: 2px dashed #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    background-color: #fafafa;
}

.logo-preview {
    margin-bottom: 15px;
    text-align: center;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: #999;
    padding: 20px;
}

.logo-placeholder.hidden {
    display: none;
}

.logo-placeholder i {
    font-size: 48px;
    color: #ccc;
}

.logo-preview img {
    border: 2px solid #e0e0e0;
    padding: 5px;
    background: white;
}

.logo-upload-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.upload-logo-btn,
.remove-logo-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.upload-logo-btn {
    background: #007bff;
    color: white;
}

.upload-logo-btn:hover {
    background: #0056b3;
    transform: translateY(-2px);
}

.remove-logo-btn {
    background: #dc3545;
    color: white;
}

.remove-logo-btn:hover {
    background: #c82333;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .settings-header {
        padding: 20px;
        flex-direction: column;
        align-items: flex-start;
    }

    .settings-title {
        font-size: 1.4em;
    }

    .settings-content {
        padding: 20px;
    }

    .section-title {
        font-size: 1.2em;
    }

    .save-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .settings-container {
        border-radius: 0;
    }

    .settings-header {
        padding: 15px;
    }

    .settings-title {
        font-size: 1.2em;
    }

    .settings-content {
        padding: 15px;
    }
}