/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 50px;
    color: white;
    position: relative;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ffffff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.95;
    font-weight: 400;
    margin-bottom: 20px;
}

/* Add floating elements for visual interest */
header::after {
    content: '';
    position: absolute;
    top: -20px;
    right: 20%;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

/* Input Section */
.input-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 
                0 8px 25px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.input-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

.input-group {
    margin-bottom: 30px;
}

.input-group label {
    display: block;
    margin-bottom: 12px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.input-group input {
    width: 100%;
    padding: 18px 20px;
    border: 2px solid rgba(102, 126, 234, 0.1);
    border-radius: 16px;
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(10px);
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1),
                0 8px 25px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.input-group input::placeholder {
    color: #94a3b8;
    font-weight: 400;
}

.character-counter {
    text-align: right;
    margin-top: 8px;
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 500;
}

/* Button Styles */
.button-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 32px;
    border: none;
    border-radius: 16px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 160px;
    justify-content: center;
    text-transform: none;
    letter-spacing: -0.02em;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #5a6268 0%, #495057 100%);
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(108, 117, 125, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838 0%, #1e9b7e 100%);
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(40, 167, 69, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Loading Animation */
.loading-spinner {
    width: 22px;
    height: 22px;
    border: 2.5px solid rgba(255, 255, 255, 0.2);
    border-top: 2.5px solid white;
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    display: none;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .loading-spinner {
    display: block;
}

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

/* Output Section */
.output-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 
                0 8px 25px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    text-align: center;
    display: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.output-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(40, 167, 69, 0.5), transparent);
}

.output-section.show {
    display: block;
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

#qrCanvas {
    border: 2px solid rgba(102, 126, 234, 0.1);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1),
                0 5px 15px rgba(0, 0, 0, 0.05);
    max-width: 100%;
    height: auto;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#qrCanvas:hover {
    transform: scale(1.02);
}

.qr-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Info Section */
.info-section {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    padding: 35px;
    border-radius: 24px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
    margin-bottom: 40px;
}

.info-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.3), transparent);
}

.info-section h3 {
    color: #1e293b;
    margin-bottom: 20px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section li {
    padding: 12px 0;
    position: relative;
    padding-left: 35px;
    font-weight: 500;
    color: #334155;
    transition: all 0.3s ease;
}

.info-section li::before {
    content: "✨";
    position: absolute;
    left: 0;
    top: 12px;
    font-size: 1.1rem;
    animation: sparkle 2s ease-in-out infinite;
}

.info-section li:hover {
    color: #667eea;
    transform: translateX(5px);
}

@keyframes sparkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

/* Donate Section */
.donate-section {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(15px);
    padding: 35px;
    border-radius: 24px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
    margin-bottom: 40px;
    text-align: center;
}

.donate-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 193, 7, 0.5), transparent);
}

.donate-content h3 {
    color: #1e293b;
    margin-bottom: 15px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.donate-content p {
    color: #64748b;
    margin-bottom: 25px;
    font-size: 1rem;
    line-height: 1.6;
}

.donate-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-donate {
    padding: 14px 24px;
    border: none;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 160px;
    justify-content: center;
    text-decoration: none;
    letter-spacing: -0.02em;
    overflow: hidden;
}

.btn-donate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-donate:hover::before {
    left: 100%;
}

.btn-donate.paypal {
    background: linear-gradient(135deg, #0070ba 0%, #003087 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(0, 112, 186, 0.3);
}

.btn-donate.paypal:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 112, 186, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-donate.kofi {
    background: linear-gradient(135deg, #ff5f5f 0%, #ff4757 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(255, 95, 95, 0.3);
}

.btn-donate.kofi:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(255, 95, 95, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-donate.crypto {
    background: linear-gradient(135deg, #f7931a 0%, #ff9500 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(247, 147, 26, 0.3);
}

.btn-donate.crypto:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(247, 147, 26, 0.4),
                0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Crypto Modal */
.crypto-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease-out;
}

.crypto-modal-content {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    margin: 20px;
    padding: 0;
    border-radius: 20px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.3s ease-out;
}

.crypto-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.crypto-modal-header h3 {
    margin: 0;
    color: #1e293b;
    font-size: 1.3rem;
    font-weight: 700;
}

.crypto-close {
    background: none;
    border: none;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #64748b;
    transition: color 0.3s ease;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.crypto-close:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.crypto-modal-body {
    padding: 30px;
}

.crypto-modal-body p {
    margin-bottom: 25px;
    color: #64748b;
    text-align: center;
    font-size: 1rem;
}

.crypto-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    background: rgba(248, 250, 252, 0.8);
    border-radius: 16px;
    margin-bottom: 15px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.crypto-option:hover {
    background: rgba(248, 250, 252, 1);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.crypto-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.crypto-info img {
    border-radius: 50%;
    flex-shrink: 0;
}

.crypto-info div {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.crypto-info strong {
    color: #1e293b;
    font-size: 1rem;
    font-weight: 600;
}

.crypto-address {
    color: #64748b;
    font-size: 0.85rem;
    font-family: 'Monaco', 'Consolas', monospace;
    word-break: break-all;
    line-height: 1.4;
}

.crypto-copy-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.crypto-copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.crypto-note {
    margin-top: 25px;
    padding: 20px;
    background: rgba(255, 193, 7, 0.1);
    border-radius: 12px;
    border-left: 4px solid #ffc107;
}

.crypto-note p {
    margin: 0;
    color: #856404;
    font-size: 0.9rem;
    text-align: left;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* FAQ Section */
.faq-section {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(15px);
    padding: 35px;
    border-radius: 24px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.3);
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.faq-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

.faq-section h2 {
    color: #1e293b;
    margin-bottom: 30px;
    font-size: 1.6rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
}

.faq-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h3 {
    color: #1e293b;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.faq-item p {
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Support This Project Section */
.support-actions {
    display: flex;
    flex-direction: column;
    gap: 30px;
    text-align: left;
    margin-top: 20px;
}

.support-actions h4 {
    color: #1e293b;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.support-actions h4::before {
    content: '🔗';
    font-size: 1.1rem;
}

.developer-credit h4::before {
    content: '👨‍💻';
}

.support-actions p {
    color: #64748b;
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.share-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.btn-social {
    padding: 12px 20px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 140px;
    justify-content: center;
    text-decoration: none;
    letter-spacing: -0.02em;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.btn-social::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-social:hover::before {
    left: 100%;
}

.btn-social:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.4),
                0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-social:nth-child(1) {
    background: linear-gradient(135deg, #1da1f2 0%, #0d8bd9 100%);
    box-shadow: 0 6px 20px rgba(29, 161, 242, 0.3);
}

.btn-social:nth-child(1):hover {
    box-shadow: 0 12px 30px rgba(29, 161, 242, 0.4),
                0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-social:nth-child(2) {
    background: linear-gradient(135deg, #4267b2 0%, #365899 100%);
    box-shadow: 0 6px 20px rgba(66, 103, 178, 0.3);
}

.btn-social:nth-child(2):hover {
    box-shadow: 0 12px 30px rgba(66, 103, 178, 0.4),
                0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-social:nth-child(3) {
    background: linear-gradient(135deg, #0077b5 0%, #005885 100%);
    box-shadow: 0 6px 20px rgba(0, 119, 181, 0.3);
}

.btn-social:nth-child(3):hover {
    box-shadow: 0 12px 30px rgba(0, 119, 181, 0.4),
                0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-social:nth-child(4) {
    background: linear-gradient(135deg, #6b46c1 0%, #553c9a 100%);
    box-shadow: 0 6px 20px rgba(107, 70, 193, 0.3);
}

.btn-social:nth-child(4):hover {
    box-shadow: 0 12px 30px rgba(107, 70, 193, 0.4),
                0 4px 12px rgba(0, 0, 0, 0.1);
}

.developer-credit {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.developer-credit::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

.developer-credit p {
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: #475569;
}

.developer-credit p:last-child {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: #64748b;
    font-style: italic;
}

.developer-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 700;
    position: relative;
    transition: all 0.3s ease;
}

.developer-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transition: width 0.3s ease;
}

.developer-link:hover {
    color: #764ba2;
}

.developer-link:hover::after {
    width: 100%;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-top: auto;
    position: relative;
    z-index: 1;
}

footer p:first-child {
    font-size: 1rem;
    margin-bottom: 10px;
    font-weight: 500;
}

/* Watermark Styles */
.watermark {
    margin-top: 15px;
    font-size: 0.95rem;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.watermark a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: inline-block;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.watermark a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px) scale(1.05);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
}

.watermark a:active {
    transform: translateY(0) scale(1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    header h1 {
        font-size: 2.8rem;
    }
    
    .input-section,
    .output-section,
    .info-section,
    .donate-section,
    .faq-section {
        padding: 30px 25px;
        margin-bottom: 30px;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        padding: 18px 32px;
    }
    
    .qr-actions {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    #qrCanvas {
        max-width: 280px;
    }

    .donate-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .btn-donate {
        width: 100%;
        max-width: 250px;
    }

    .share-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .btn-social {
        width: 100%;
        max-width: 250px;
    }

    .support-actions {
        gap: 25px;
    }

    .developer-credit {
        padding: 20px;
    }

    .crypto-modal-content {
        margin: 15px;
        max-width: calc(100vw - 30px);
    }

    .crypto-modal-header,
    .crypto-modal-body {
        padding: 20px;
    }

    .crypto-option {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        text-align: left;
    }

    .crypto-copy-btn {
        align-self: stretch;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px 10px;
    }

    header h1 {
        font-size: 2.2rem;
    }
    
    header p {
        font-size: 1.1rem;
    }
    
    .input-section,
    .output-section,
    .info-section,
    .donate-section,
    .faq-section {
        padding: 25px 20px;
        border-radius: 20px;
    }
    
    .input-group input {
        padding: 16px 18px;
        border-radius: 14px;
        font-size: 16px;
    }

    .btn {
        padding: 16px 28px;
        font-size: 15px;
        border-radius: 14px;
    }

    .btn-donate {
        padding: 16px 24px;
        font-size: 14px;
        min-width: 140px;
    }

    .btn-social {
        padding: 14px 20px;
        font-size: 13px;
        min-width: 120px;
        border-radius: 10px;
    }

    .support-actions {
        gap: 20px;
    }

    .support-actions h4 {
        font-size: 1.1rem;
    }

    .developer-credit {
        padding: 18px;
    }

    #qrCanvas {
        max-width: 250px;
        border-radius: 16px;
    }

    .info-section li {
        padding: 10px 0;
        font-size: 0.95rem;
    }

    .crypto-modal-header h3 {
        font-size: 1.2rem;
    }

    .crypto-address {
        font-size: 0.8rem;
    }
}

@media (max-width: 360px) {
    header h1 {
        font-size: 2rem;
    }

    .input-section,
    .output-section,
    .info-section,
    .donate-section {
        padding: 20px 15px;
    }

    #qrCanvas {
        max-width: 220px;
    }

    .btn-donate {
        min-width: 120px;
        padding: 14px 20px;
        font-size: 13px;
    }
}

/* Enhanced focus styles for accessibility */
.btn:focus,
input:focus {
    outline: 3px solid rgba(102, 126, 234, 0.5);
    outline-offset: 2px;
}

/* Smooth transitions for all interactive elements */
* {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Improved selection styles */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: #1a1a1a;
}

/* Loading state improvements */
.btn.loading {
    cursor: wait;
    pointer-events: none;
}

/* Add subtle animations for better UX */
.input-section,
.output-section,
.info-section {
    animation: slideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.input-section {
    animation-delay: 0.1s;
}

.info-section {
    animation-delay: 0.2s;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}