:root {
    --primary-yellow: #F6DC4B;
    --primary-blue: #226C9F;
    --primary-dark: #12170E;
    --secondary-blue: #2A86C9;
    --light-gray: #F8F9FA;
    --medium-gray: #E9ECEF;
    --dark-gray: #6C757D;
    --success-color: #28A745;
    --error-color: #DC3545;
    --shadow-light: rgba(0, 0, 0, 0.08);
    --shadow-medium: rgba(0, 0, 0, 0.12);
    --shadow-heavy: rgba(0, 0, 0, 0.15);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius: 12px;
    --border-radius-small: 8px;
    --border-radius-large: 20px;
}

.wcds-donation-container {
    max-width: 580px;
    margin: 0 auto;
    padding: 40px;
    background: linear-gradient(145deg, #ffffff, var(--light-gray));
    border: none;
    border-radius: var(--border-radius-large);
    box-shadow: 0 20px 40px var(--shadow-medium),
                0 8px 16px var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.wcds-donation-container:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: #226C9F;
    z-index: 2;
}

.wcds-donation-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 25px;
    border-bottom: 2px solid #287fbe;
    position: relative;
}

.wcds-donation-header:after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-yellow);
    border-radius: 2px;
}

.wcds-donation-header h3 {
    color: #226C9F;
    margin: 0 0 15px 0;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.wcds-donation-header p {
    color: var(--dark-gray);
    margin: 0;
    font-size: 17px;
    line-height: 1.6;
    max-width: 90%;
    margin: 0 auto;
    font-weight: 400;
}

.wcds-donation-amounts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 35px;
}

.wcds-donation-amount-btn {
    display: block;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-normal);
}

.wcds-donation-radio {
    display: none;
}

.wcds-amount-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 25px 15px;
    background: white;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-dark);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-height: 90px;
}

.wcds-amount-display:before {
    content: '$';
    font-size: 18px;
    color: var(--dark-gray);
    margin-bottom: 5px;
    font-weight: 600;
}

.wcds-amount-display:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-yellow);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.wcds-donation-radio:checked + .wcds-amount-display {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(34, 108, 159, 0.25);
}

.wcds-donation-radio:checked + .wcds-amount-display:before {
    color: white;
}

.wcds-donation-radio:checked + .wcds-amount-display:after {
    transform: scaleX(1);
    background: var(--primary-yellow);
}

.wcds-donation-radio:checked + .wcds-amount-display .amount-value {
    font-size: 24px;
    font-weight: 800;
}

.wcds-amount-display:hover {
    border-color: var(--primary-blue);
    background: var(--light-gray);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--shadow-light);
}

.wcds-amount-display:hover:before {
    color: var(--primary-blue);
}

.wcds-donation-amount-btn.hover .wcds-amount-display {
    border-color: var(--primary-blue);
    background: var(--light-gray);
}

.wcds-donation-amount-btn.active .wcds-amount-display {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(34, 108, 159, 0.25);
}

.wcds-donation-amount-btn.active .wcds-amount-display:before {
    color: white;
}

.wcds-custom-amount {
    margin-bottom: 30px;
    padding: 0;
    background: transparent;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.wcds-custom-amount:focus-within {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(34, 108, 159, 0.1);
}

.wcds-custom-amount label {
    display: block;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--primary-dark);
    font-size: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.wcds-custom-amount label:before {
    content: '💰';
    font-size: 18px;
}

.wcds-custom-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: white;
    border-radius: var(--border-radius-small);
    overflow: hidden;
    border: 2px solid var(--medium-gray);
    transition: all var(--transition-normal);
}

.wcds-custom-input-wrapper:focus-within {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(34, 108, 159, 0.1);
}

.wcds-custom-input-wrapper:before {
    content: '$';
    position: absolute;
    left: 20px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    z-index: 1;
    transition: all var(--transition-normal);
}

.wcds-custom-input {
    width: 100%;
    padding: 18px 20px 18px 45px;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    background: transparent;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.wcds-custom-input::-webkit-outer-spin-button,
.wcds-custom-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.wcds-custom-input:focus {
    outline: none;
    background: white;
}

.wcds-custom-input:focus + .wcds-custom-input-wrapper:before {
    color: var(--primary-blue);
    transform: scale(1.1);
}

.wcds-custom-input.filled {
    color: var(--primary-blue);
}

.wcds-custom-input::placeholder {
    color: var(--dark-gray);
    font-weight: 500;
    opacity: 0.6;
}

.wcds-donation-submit {
    text-align: center;
    margin-top: 35px;
}

.wcds-donate-now-btn {
    background: linear-gradient(135deg, #226da0 0%, #2982c2 100%);
    color: var(--primary-dark);
    border: none;
    padding: 20px 50px;
    font-size: 20px;
    font-weight: 800;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(246, 220, 75, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    min-height: 68px;
}

.wcds-donate-now-btn:before {
    content: '❤️';
    font-size: 18px;
    transition: transform var(--transition-normal);
}

.wcds-donate-now-btn:hover {
    background: linear-gradient(135deg, #226c9f 0%, #2880bf 100%);
    color: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(246, 220, 75, 0.4);
    letter-spacing: 2px;
}

.wcds-donate-now-btn:hover:before {
    transform: scale(1.2);
}

.wcds-donate-now-btn:active {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(246, 220, 75, 0.3);
}

.wcds-donate-now-btn:after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.7s;
}

.wcds-donate-now-btn:hover:after {
    left: 100%;
}

.wcds-messages {
    margin-top: 25px;
    text-align: center;
    min-height: auto;
    border: none;
    padding: 0;
    background: transparent;
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.wcds-messages.show {
    max-height: 200px;
    margin-top: 25px;
}

.wcds-messages .error,
.wcds-messages .success {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    margin: 0;
    text-transform: none;
    font-size: 16px;
    letter-spacing: 0;
    text-align: left;
    animation: slideIn 0.3s ease;
}

.wcds-messages .error {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, rgba(220, 53, 69, 0.05) 100%);
    color: var(--error-color);
    border: 2px solid rgba(220, 53, 69, 0.2);
}

.wcds-messages .error:before {
    content: '⚠️';
    font-size: 20px;
    flex-shrink: 0;
}

.wcds-messages .success {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.1) 0%, rgba(40, 167, 69, 0.05) 100%);
    color: var(--success-color);
    border: 2px solid rgba(40, 167, 69, 0.2);
}

.wcds-messages .success:before {
    content: '✅';
    font-size: 20px;
    flex-shrink: 0;
}

/* Loading state */
.wcds-donate-now-btn.loading {
    color: transparent !important;
    pointer-events: none;
    background: var(--medium-gray);
}

.wcds-donate-now-btn.loading:before {
    display: none;
}

.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--primary-yellow);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    flex-shrink: 0;
}

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

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes successPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.error-shake {
    animation: errorShake 0.5s ease;
}

.success-animation {
    animation: successPulse 0.8s ease;
}

.selected-pulse .wcds-amount-display {
    animation: successPulse 0.3s ease;
}

/* Focus states for accessibility */
.wcds-donation-radio:focus + .wcds-amount-display {
    outline: 3px solid var(--primary-yellow);
    outline-offset: 2px;
}

.wcds-custom-input:focus,
.wcds-custom-input-wrapper:focus-within {
    outline: none;
}

.wcds-donate-now-btn:focus {
    outline: 3px solid var(--primary-yellow);
    outline-offset: 3px;
}

/* Responsive styles */
@media (max-width: 768px) {
    .wcds-donation-container {
        padding: 30px 25px;
        margin: 0 15px;
        border-radius: var(--border-radius);
    }
    
    .wcds-donation-header h3 {
        font-size: 24px;
    }
    
    .wcds-donation-header p {
        font-size: 16px;
    }
    
    .wcds-donation-amounts {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .wcds-donation-amounts {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .wcds-amount-display {
        padding: 20px 10px;
        font-size: 20px;
        min-height: 80px;
    }
    
    .wcds-custom-amount {
        padding: 20px;
    }
    
    .wcds-custom-input {
        padding: 16px 15px 16px 40px;
        font-size: 18px;
    }
    
    .wcds-donate-now-btn {
        padding: 18px 30px;
        font-size: 18px;
        min-height: 60px;
    }
}

@media (max-width: 576px) {
    .wcds-donation-container {
        padding: 25px 20px;
        margin: 0 10px;
    }
    
    .wcds-donation-header h3 {
        font-size: 22px;
    }
    
    .wcds-donation-header p {
        font-size: 15px;
    }
    
    .wcds-donation-amounts {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .wcds-amount-display {
        padding: 18px 8px;
        font-size: 18px;
        min-height: 75px;
    }
    
    .wcds-custom-input {
        padding: 14px 12px 14px 35px;
        font-size: 16px;
    }
    
    .wcds-donate-now-btn {
        padding: 16px 20px;
        font-size: 16px;
        letter-spacing: 1px;
        min-height: 56px;
    }
    
    .wcds-messages .error,
    .wcds-messages .success {
        padding: 15px;
        font-size: 14px;
        gap: 12px;
    }
}

@media (max-width: 400px) {
    .wcds-donation-amounts {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .wcds-donation-amounts {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .wcds-amount-display {
        font-size: 16px;
        min-height: 70px;
        padding: 15px 5px;
    }
}

/* Print styles */
@media print {
    .wcds-donation-container {
        border: 1px solid #ddd;
        box-shadow: none;
        background: white;
    }
    
    .wcds-donate-now-btn {
        display: none;
    }
    
    .wcds-custom-input {
        border: 1px solid #ddd;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .wcds-donation-container {
        background: #f6dd50;
    }
    
    .wcds-donation-header h3 {
        background: #226da1;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    
    .wcds-donation-header p {
        color: #000000cf;
    }
    
       .wcds-amount-display {
        background: white;
        border-color: #287fbd;
        color: black;
    }
    
    .wcds-custom-input {
        background: #4a5568;
        color: #e2e8f0;
    }
    
    .wcds-custom-input-wrapper {
        background: #4a5568;
        border-color: #718096;
    }
    
    .wcds-custom-input-wrapper:before {
        color: #e2e8f0;
    }
}