:root {
    --rddl-primary: #00763C; /* Typical corporate green default, easily overridden */
    --rddl-primary-hover: #005c2f;
    --rddl-text-dark: #1a1a1a;
    --rddl-text-light: #555555;
    --rddl-bg-light: #ffffff;
    --rddl-bg-subtle: #f8f9fa;
    --rddl-border-color: #e0e0e0;
    --rddl-error: #dc3545;
    --rddl-success: #28a745;
    --rddl-border-radius: 8px;
    --rddl-transition: all 0.3s ease;
    --rddl-font-family: inherit;
}

.rddl-collaboration-wrapper {
    font-family: var(--rddl-font-family);
    color: var(--rddl-text-dark);
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Selector */
.rddl-selector-title {
    text-align: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
    font-weight: 600;
}

.rddl-selector-cards {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    justify-content: center;
}

.rddl-selector-card {
    color: var(--rddl-primary);
    flex: 1;
    background: var(--rddl-bg-light);
    border: 2px solid var(--rddl-border-color);
    border-radius: var(--rddl-border-radius);
    padding: 24px 16px;
    cursor: pointer;
    text-align: center;
    transition: var(--rddl-transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    outline: none;
}

.rddl-selector-card:hover, .rddl-selector-card:focus {
    border-color: var(--rddl-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.rddl-selector-card.active {
    border-color: var(--rddl-primary);
    background: var(--rddl-bg-subtle);
    box-shadow: 0 0 0 1px var(--rddl-primary);
}

.rddl-card-icon {
    color: var(--rddl-primary);
    display: flex;
    transition: var(--rddl-transition);
}

.rddl-card-text {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--rddl-primary);
}

/* Forms */
.rddl-form-view {
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.rddl-form-section {
    background: var(--rddl-bg-light);
    border: 1px solid var(--rddl-border-color);
    border-radius: var(--rddl-border-radius);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.02);
}

.rddl-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--rddl-border-color);
}

.rddl-section-num {
    background: var(--rddl-primary);
    color: #fff;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.9rem;
}

/* Grid */
.rddl-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.rddl-grid-1 {
    display: grid;
    grid-template-columns: 1fr;
}

/* Fields */
.rddl-field-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.rddl-field-group label {
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--rddl-text-dark);
}

.rddl-req {
    color: var(--rddl-error);
}

.rddl-input,
.rddl-select,
.rddl-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--rddl-border-color);
    border-radius: var(--rddl-border-radius);
    background: var(--rddl-bg-light);
    font-family: inherit;
    font-size: 1rem;
    color: var(--rddl-text-dark);
    transition: var(--rddl-transition);
    box-sizing: border-box;
}

.rddl-input:focus,
.rddl-select:focus,
.rddl-textarea:focus {
    outline: none;
    border-color: var(--rddl-primary);
    box-shadow: 0 0 0 3px rgba(0, 118, 60, 0.1);
}

.rddl-textarea {
    resize: vertical;
}

/* Checkboxes */
.rddl-checkbox-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.rddl-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 400 !important;
    cursor: pointer;
}

/* Radio Cards */
.rddl-radio-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.rddl-radio-card {
    position: relative;
    border: 1px solid var(--rddl-border-color);
    border-radius: var(--rddl-border-radius);
    padding: 16px;
    cursor: pointer;
    transition: var(--rddl-transition);
    font-weight: 500 !important;
}

.rddl-radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.rddl-radio-card:hover {
    border-color: var(--rddl-primary);
}

.rddl-radio-card:has(input:checked) {
    border-color: var(--rddl-primary);
    background: var(--rddl-bg-subtle);
    box-shadow: 0 0 0 1px var(--rddl-primary);
}

/* Submit */
.rddl-submit-wrapper {
    text-align: right;
    margin-top: 32px;
}

.rddl-submit-btn {
    background: var(--rddl-primary);
    color: #fff;
    border: none;
    border-radius: var(--rddl-border-radius);
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--rddl-transition);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.rddl-submit-btn:hover, .rddl-submit-btn:focus {
    background: var(--rddl-primary-hover);
    transform: translateY(-1px);
}

.rddl-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Loader */
.rddl-loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: rddl-spin 1s ease-in-out infinite;
}

@keyframes rddl-spin {
    to { transform: rotate(360deg); }
}

/* Messages */
.rddl-form-message {
    padding: 20px;
    border-radius: var(--rddl-border-radius);
    margin-top: 24px;
    font-weight: 500;
}

.rddl-msg-success {
    background: #e8f5e9;
    color: var(--rddl-success);
    border: 1px solid #c8e6c9;
}

.rddl-msg-error {
    background: #ffebee;
    color: var(--rddl-error);
    border: 1px solid #ffcdd2;
}

/* Responsive */
@media (max-width: 768px) {
    .rddl-grid-2 {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .rddl-selector-cards {
        flex-direction: column;
    }
    
    .rddl-submit-btn {
        width: 100%;
        justify-content: center;
    }
}