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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(99, 102, 241, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

.container {
    width: 100%;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.content-wrapper {
    background: var(--white);
    border-radius: 24px;
    padding: 60px 40px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

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

.logo-section {
    margin-bottom: 40px;
    animation: fadeIn 0.8s ease-out 0.2s both;
}

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

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    margin: 0 auto;
    border-radius: 2px;
}

.message-section {
    margin-bottom: 40px;
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.icon-wrapper {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    animation: scaleIn 0.5s ease-out 0.6s both;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.success-icon-circle {
    stroke: var(--secondary-color);
    stroke-width: 2;
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) 0.8s forwards;
}

@keyframes stroke {
    100% {
        stroke-dashoffset: 0;
    }
}

.success-icon-check {
    stroke: var(--secondary-color);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 1.2s forwards;
}

.thank-you {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 600;
}

.instruction {
    font-size: 1.2rem;
    color: var(--text-light);
    line-height: 1.6;
}

.amount {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.4rem;
}

.cta-section {
    margin-bottom: 30px;
    animation: fadeIn 0.8s ease-out 0.6s both;
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    border: none;
    padding: 18px 48px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.cta-button:active {
    transform: translateY(0);
}

.arrow-icon {
    transition: transform 0.3s ease;
}

.cta-button:hover .arrow-icon {
    transform: translateX(5px);
}

.footer-note {
    animation: fadeIn 0.8s ease-out 0.8s both;
}

.footer-note p {
    color: var(--text-light);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.footer-note p::before {
    content: '🔒';
    font-size: 1rem;
}

.background-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    right: -50px;
    animation-delay: 7s;
}

.circle-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    right: -75px;
    animation-delay: 14s;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .content-wrapper {
        padding: 40px 30px;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .thank-you {
        font-size: 1.5rem;
    }
    
    .instruction {
        font-size: 1rem;
    }
    
    .amount {
        font-size: 1.2rem;
    }
    
    .cta-button {
        padding: 16px 40px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .content-wrapper {
        padding: 30px 20px;
    }
    
    .logo {
        font-size: 1.75rem;
    }
    
    .thank-you {
        font-size: 1.25rem;
    }
    
    .success-icon {
        width: 60px;
        height: 60px;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: 16px;
    padding: 0;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
    overflow: hidden;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px) scale(0.9);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.modal-header {
    padding: 24px 30px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-light);
    cursor: pointer;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s ease;
    line-height: 1;
}

.close-btn:hover {
    background: #f3f4f6;
    color: var(--text-dark);
}

.modal-body {
    padding: 30px;
}

.modal-body label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.modal-body input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.modal-body input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.modal-hint {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 12px;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.modal-hint::before {
    content: '💡';
    font-size: 1rem;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    background: #f9fafb;
}

.modal-btn {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cancel-btn {
    background: #ffffff;
    color: var(--text-dark);
    border: 2px solid #e5e7eb;
}

.cancel-btn:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
}

.save-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.save-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.save-btn:active {
    transform: translateY(0);
}

/* Modal Responsive */
@media (max-width: 600px) {
    .modal-content {
        width: 95%;
    }
    
    .modal-header {
        padding: 20px 24px;
    }
    
    .modal-header h3 {
        font-size: 1.25rem;
    }
    
    .modal-body {
        padding: 24px;
    }
    
    .modal-footer {
        padding: 16px 24px;
        flex-direction: column;
    }
    
    .modal-btn {
        width: 100%;
    }
}