.session-alert-open {
    overflow: hidden !important;
}

.session-alert-layer {
    position: fixed;
    inset: 0;
    z-index: 10050;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    padding-top: max(2rem, env(safe-area-inset-top));
    padding-bottom: max(2rem, env(safe-area-inset-bottom));
    font-family: "Noto Sans KR", sans-serif;
}

.session-alert-layer.is-open {
    display: flex;
}

.session-alert-layer__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.58);
    backdrop-filter: blur(2px);
}

.session-alert {
    position: relative;
    width: 42rem;
    max-width: 100%;
    width: min(100%, 42rem);
    max-height: calc(100vh - 4rem);
    max-height: calc(100dvh - 4rem - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    overflow-y: auto;
    padding: 3.2rem;
    border: 1px solid #e2e8f0;
    border-radius: 1.6rem;
    background: #fff;
    box-shadow: 0 2.4rem 6rem rgba(15, 23, 42, 0.24);
    color: #172033;
    text-align: center;
}

.session-alert__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 5.6rem;
    height: 5.6rem;
    margin: 0 auto 1.6rem;
    border-radius: 50%;
    background: #eef5ff;
    color: #176bd8;
}

.session-alert__icon svg {
    width: 3.2rem;
    height: 3.2rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
}

.session-alert__title {
    margin: 0;
    color: #111827;
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.35;
    word-break: keep-all;
}

.session-alert__message {
    margin: 1.2rem 0 0;
    color: #4b5563;
    font-size: 1.6rem;
    font-weight: 400;
    line-height: 1.65;
    word-break: keep-all;
}

.session-alert__countdown-wrap {
    margin-top: 2rem;
    padding: 1.6rem;
    border-radius: 1.2rem;
    background: #f8fafc;
}

.session-alert__countdown-label {
    display: block;
    margin-bottom: 0.4rem;
    color: #64748b;
    font-size: 1.4rem;
    font-weight: 500;
}

.session-alert__countdown {
    display: block;
    color: #dc2626;
    font-family: "Inter", "Noto Sans KR", sans-serif;
    font-size: 3.6rem;
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.session-alert__sr-status {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.session-alert__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2.4rem;
}

.session-alert__actions--info {
    grid-template-columns: minmax(0, 1fr);
}

.session-alert__actions[hidden],
.session-alert__countdown-wrap[hidden] {
    display: none !important;
}

.session-alert__button {
    min-height: 5.2rem;
    padding: 0.8rem 1.6rem;
    border: 1px solid transparent;
    border-radius: 0.8rem;
    font-family: "Noto Sans KR", sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.3;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.session-alert__button--primary {
    background: #176bd8;
    color: #fff;
}

.session-alert__button--primary:hover,
.session-alert__button--primary:focus-visible {
    background: #0f5dc2;
}

.session-alert__button--secondary {
    border-color: #cbd5e1;
    background: #fff;
    color: #334155;
}

.session-alert__button--secondary:hover,
.session-alert__button--secondary:focus-visible {
    border-color: #94a3b8;
    background: #f8fafc;
}

.session-alert__button:focus-visible {
    outline: 3px solid rgba(23, 107, 216, 0.28);
    outline-offset: 2px;
}

.session-alert__button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.session-toast {
    position: fixed;
    top: max(2rem, env(safe-area-inset-top));
    left: 50%;
    z-index: 10060;
    width: max-content;
    max-width: min(calc(100% - 3.2rem), 48rem);
    padding: 1.4rem 1.8rem;
    border-radius: 0.9rem;
    background: #172033;
    box-shadow: 0 1.2rem 3rem rgba(15, 23, 42, 0.25);
    color: #fff;
    font-family: "Noto Sans KR", sans-serif;
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    word-break: keep-all;
    opacity: 0;
    transform: translate(-50%, -1rem);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.session-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

@media (max-width: 640px) {
    .session-alert-layer {
        align-items: flex-end;
        padding: 1.2rem;
        padding-bottom: max(1.2rem, env(safe-area-inset-bottom));
    }

    .session-alert {
        width: 100%;
        max-height: calc(100vh - 2.4rem);
        max-height: calc(100dvh - 2.4rem - env(safe-area-inset-top) - env(safe-area-inset-bottom));
        padding: 2.4rem 2rem 2rem;
        border-radius: 1.6rem;
    }

    .session-alert__title {
        font-size: 2rem;
    }

    .session-alert__message,
    .session-alert__button {
        font-size: 1.6rem;
    }

    .session-alert__actions {
        grid-template-columns: minmax(0, 1fr);
    }

    .session-alert__button--primary {
        order: -1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .session-alert__button,
    .session-toast {
        transition: none;
    }
}