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

html,
body {
    width: 100%;
    min-height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #0d0d0d;
    color: #ffffff;
}

.age-gate {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(circle at top, rgba(255, 193, 7, 0.12), transparent 35%),
        #0d0d0d;
}

.card {
    width: 100%;
    max-width: 460px;
    padding: 42px 32px;
    text-align: center;
    background: #171717;
    border: 1px solid #303030;
    border-radius: 18px;
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
}

.icon {
    width: 78px;
    height: 78px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #f5c400;
    border-radius: 50%;
    color: #f5c400;
    font-size: 25px;
    font-weight: 800;
}

h1 {
    margin-bottom: 14px;
    font-size: clamp(28px, 6vw, 38px);
    line-height: 1.1;
}

.message {
    margin-bottom: 28px;
    color: #c7c7c7;
    font-size: 16px;
    line-height: 1.5;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 22px;
    padding: 15px;
    text-align: left;
    color: #eeeeee;
    font-size: 15px;
    line-height: 1.4;
    cursor: pointer;
    border: 1px solid #383838;
    border-radius: 10px;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.checkbox-container:hover {
    background: #202020;
    border-color: #555555;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkmark {
    flex: 0 0 21px;
    width: 21px;
    height: 21px;
    margin-top: 1px;
    border: 2px solid #777777;
    border-radius: 5px;
    position: relative;
    transition: all 0.2s ease;
}

.checkbox-container input:checked + .checkmark {
    background: #f5c400;
    border-color: #f5c400;
}

.checkbox-container input:checked + .checkmark::after {
    content: "";
    position: absolute;
    width: 5px;
    height: 10px;
    left: 6px;
    top: 2px;
    border: solid #111111;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:focus-visible + .checkmark {
    outline: 3px solid rgba(245, 196, 0, 0.35);
    outline-offset: 3px;
}

button {
    width: 100%;
    min-height: 52px;
    border: 0;
    border-radius: 10px;
    background: #f5c400;
    color: #111111;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.2s ease;
}

button:not(:disabled):hover {
    transform: translateY(-1px);
}

button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.error {
    min-height: 20px;
    margin-top: 14px;
    color: #ff7272;
    font-size: 14px;
}

@media (max-width: 480px) {
    .age-gate {
        padding: 16px;
    }

    .card {
        padding: 34px 22px;
    }
}