* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: Arial, Helvetica, sans-serif;
    color: #1f2937;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #f5f0ea url('bg.jpg') repeat center top;
    position: relative;
    overflow: hidden;
}

body::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.52);
    pointer-events: none;
}

.card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 560px;
    padding: 36px 28px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.10);
    text-align: center;
}

h1 {
    margin: 0 0 14px;
    font-size: clamp(30px, 5vw, 48px);
    line-height: 1.08;
    color: #111827;
    letter-spacing: -0.03em;
}

.subtitle {
    margin: 0 auto 28px;
    max-width: 430px;
    font-size: 17px;
    line-height: 1.6;
    color: #4b5563;
}

.cta-wrap {
    display: flex;
    justify-content: center;
}

.wa-btn {
    appearance: none;
    border: 0;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    min-width: 260px;
    padding: 18px 28px;
    border-radius: 18px;
    background: linear-gradient(180deg, #2ee16d 0%, #1fb959 100%);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    line-height: 1;
    box-shadow: 0 14px 30px rgba(37, 211, 102, 0.34);
    transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
    position: relative;
    overflow: hidden;
}

.wa-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(255, 255, 255, 0) 20%, rgba(255, 255, 255, 0.25) 50%, rgba(255, 255, 255, 0) 80%);
    transform: translateX(-130%);
}

.wa-btn:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 18px 34px rgba(37, 211, 102, 0.42);
    filter: brightness(1.02);
}

.wa-btn:active {
    transform: translateY(0) scale(0.99);
}

.wa-btn img {
    width: 32px;
    height: 32px;
    display: block;
    flex: 0 0 32px;
}

.note {
    margin-top: 18px;
    font-size: 13px;
    color: #6b7280;
}

@media (max-width: 640px) {
    body {
        padding: 16px;
    }

    .card {
        padding: 28px 18px;
        border-radius: 22px;
    }

    .subtitle {
        font-size: 16px;
    }

    .wa-btn {
        width: 100%;
        min-width: 0;
        padding: 17px 20px;
        font-size: 17px;
    }
}