/* Robot WAF — base layout & look (matches the security-inspection screenshot) */
* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

.body-style {
    min-height: 100vh;
    background: #ffffff;
    color: #222226;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.main-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 48px 16px;
}

.main-content {
    width: 100%;
    max-width: 620px;
}

#challenge-stage {
    text-align: center;
}

/* Page title — orange, bold */
.title {
    color: #FC5431;
    font-size: 42px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: 2px;
    margin: 8px 0 28px;
}

/* Card */
.card.main {
    background: #ffffff;
    border: 1px solid #ececef;
    border-radius: 16px;
    padding: 30px 34px 40px;
    box-shadow: 0 12px 40px rgba(20, 20, 30, 0.04);
    text-align: left;
}

/* Welcome banner */
.card-title {
    display: flex;
    align-items: center;
    background: #fdf1e6;
    border-radius: 12px;
    padding: 22px 24px;
}

.card-title .icon-chart {
    width: 29px;
    height: 24px;
    margin-right: 16px;
    flex: 0 0 auto;
}

.card-title-text {
    color: #222226;
    font-size: 18px;
    font-weight: 600;
}

/* Footer */
.card-footer {
    margin-top: 26px;
    text-align: center;
}

.card-footer-title {
    color: #adadb6;
    font-size: 14px;
    line-height: 1.7;
    margin: 16px 0 22px;
}

/* Continue button — green gradient pill */
.btn {
    display: inline-block;
    border: none;
    outline: none;
    cursor: pointer;
    color: #ffffff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 16px 44px;
    border-radius: 999px;
    background: linear-gradient(180deg, #7ec24a 0%, #56a838 100%);
    box-shadow: 0 8px 22px rgba(96, 168, 61, 0.45);
    transition: transform 0.08s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn:hover { box-shadow: 0 10px 28px rgba(96, 168, 61, 0.6); }
.btn:active { transform: translateY(1px); }
.btn[disabled],
.btn.is-loading { opacity: 0.7; cursor: default; }

@media (max-width: 560px) {
    .title { font-size: 30px; letter-spacing: 1px; }
    .card.main { padding: 24px 18px 32px; }
    .card-title-text { font-size: 16px; }
}