.use-case-section {
    padding-top: 96px;
    padding-bottom: 96px;
    background: #ffffff;
}

.use-case-head {
    max-width: 760px;
}

.use-case-flow {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.use-case-simple,
.use-case-result {
    width: 100%;
}

.use-case-box-label {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    margin-bottom: 14px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.06);
    color: #0f172a;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.use-case-box-label-dark {
    background: rgba(249, 115, 22, 0.14);
    color: #fdba74;
}

.mail-demo-compact {
    width: 100%;
    max-width: none;
    background: #ffffff;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 24px;
    padding: 24px 26px;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.07);
}

.mail-demo-compact > div {
    display: grid;
    grid-template-columns: 78px 1fr;
    gap: 14px;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    font-size: 15px;
    color: #0f172a;
}

.mail-demo-compact > div:last-child {
    border-bottom: none;
}

.mail-demo-compact strong {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
}

.mail-demo-code {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 12px;
    background: rgba(249, 115, 22, 0.10);
    color: #c2410c;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px;
    font-weight: 700;
}

.mail-demo-message {
    display: block !important;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    border-bottom: none !important;
}

.mail-demo-message p {
    margin: 0 0 12px;
    color: #334155;
    font-size: 15px;
    line-height: 1.7;
}

.mail-demo-message p:last-child {
    margin-bottom: 0;
}

.use-case-flow-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #64748b;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.use-case-flow-divider::before,
.use-case-flow-divider::after {
    content: "";
    height: 1px;
    flex: 1;
    background: linear-gradient(
        to right,
        rgba(15, 23, 42, 0),
        rgba(15, 23, 42, 0.12),
        rgba(15, 23, 42, 0)
    );
}

.use-case-flow-divider span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0 12px;
    border-radius: 999px;
    background: #f8fafc;
    border: 1px solid rgba(15, 23, 42, 0.06);
    white-space: nowrap;
}

.use-case-result {
    width: 100%;
    padding: 32px;
    border-radius: 28px;
    background:
        radial-gradient(circle at 10% 12%, rgba(249, 115, 22, 0.18) 0%, rgba(249, 115, 22, 0.08) 24%, transparent 55%),
        radial-gradient(circle at 88% 18%, rgba(34, 211, 238, 0.14) 0%, rgba(34, 211, 238, 0.06) 26%, transparent 58%),
        linear-gradient(180deg, #0f172a 0%, #111827 100%);
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.16);
}

.use-case-result h3 {
    margin: 0 0 16px;
    font-size: 28px;
    line-height: 1.12;
    font-weight: 600;
    color: #ffffff;
    max-width: 820px;
}

.use-case-result-copy {
    margin: 0 0 18px;
    max-width: 820px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    line-height: 1.7;
}

.use-case-variants {
    display: grid;
    gap: 14px;
}

.variant {
    padding: 18px 20px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.14);
    backdrop-filter: blur(6px);
}

.variant strong {
    display: block;
    margin-bottom: 8px;
    font-size: 15px;
    line-height: 1.35;
    color: #ffffff;
}

.variant p {
    margin: 0;
    color: rgba(255, 255, 255, 0.84);
    font-size: 14.5px;
    line-height: 1.7;
}

.use-case-bottom-note {
    margin-top: 18px;
    text-align: center;
    font-size: 15px;
    line-height: 1.6;
    color: #64748b;
}

@media (max-width: 768px) {
    .use-case-section {
        padding-top: 72px;
        padding-bottom: 72px;
    }

    .use-case-flow {
        margin-top: 28px;
        gap: 16px;
    }

    .mail-demo-compact {
        padding: 18px;
        border-radius: 20px;
    }

    .mail-demo-compact > div {
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 9px 0;
        font-size: 14px;
    }

    .mail-demo-message {
        display: block !important;
    }

    .mail-demo-message p {
        font-size: 14px;
        line-height: 1.6;
    }

    .use-case-flow-divider {
        gap: 10px;
        font-size: 11px;
    }

    .use-case-flow-divider span {
        min-height: 28px;
        padding: 0 10px;
    }

    .use-case-result {
        padding: 22px 18px;
        border-radius: 22px;
    }

    .use-case-result h3 {
        font-size: 23px;
        margin-bottom: 14px;
    }

    .use-case-result-copy {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 14px;
    }

    .variant {
        padding: 15px 16px;
        border-radius: 16px;
    }

    .variant strong {
        font-size: 14px;
    }

    .variant p {
        font-size: 13.5px;
        line-height: 1.6;
    }

    .use-case-bottom-note {
        font-size: 14px;
        margin-top: 14px;
    }
}

.variant-note {
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    background: linear-gradient(
        135deg,
        rgba(249, 115, 22, 0.10),
        rgba(255, 255, 255, 0.05)
    );
    border: 1px solid rgba(249, 115, 22, 0.18);
    font-size: 12.5px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.72);
}