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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.thank-you-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    animation: slideUp 0.6s ease-out;
}

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

/* Checkmark Animation */
.checkmark-container {
    margin-bottom: 30px;
}

.checkmark {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    display: block;
}

.checkmark-circle {
    stroke: #e74c3c;
    stroke-width: 2;
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.checkmark-check {
    stroke: #e74c3c;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.4s forwards;
}

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

/* Typography */
.title {
    font-size: 32px;
    color: #333;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 16px;
    color: #e74c3c;
    margin-bottom: 25px;
    font-weight: 500;
}

.message {
    background: #fff5f5;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    border-left: 4px solid #e74c3c;
}

.message p {
    color: #c0392b;
    font-size: 14px;
    line-height: 1.6;
    font-weight: 600;
}

/* Button */
.continue-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
}

.continue-btn:active {
    transform: scale(0.98);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

.continue-btn:hover {
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.5);
}

/* Mobile Optimization */
@media (max-width: 480px) {
    .thank-you-card {
        padding: 30px 20px;
        border-radius: 16px;
    }

    .title {
        font-size: 28px;
    }

    .subtitle {
        font-size: 14px;
    }

    .checkmark {
        width: 70px;
        height: 70px;
    }

    .continue-btn {
        padding: 14px;
        font-size: 15px;
    }
}