/* PWA · 安裝至主畫面引導 */

.home-left-pillar {
    position: absolute;
    top: var(--void-home-hdr-gap);
    left: 0;
    z-index: 24;
    width: min(320px, 28vw);
    min-width: 248px;
    max-width: 360px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.home-left-pillar > * {
    pointer-events: auto;
}

.home-left-pillar .void-seal-cert--pillar {
    position: relative;
    top: auto;
    left: auto;
    bottom: auto;
    right: auto;
    width: 100%;
    min-width: 0;
    max-width: none;
}

.pwa-install-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin: 0;
    padding: 12px 16px;
    border: 1px solid rgba(192, 132, 252, 0.45);
    border-radius: 14px;
    background: linear-gradient(145deg, rgba(12, 6, 28, 0.92) 0%, rgba(22, 10, 48, 0.88) 100%);
    box-shadow:
        0 0 20px rgba(127, 0, 255, 0.25),
        0 8px 24px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    color: rgba(245, 240, 255, 0.96);
    font-family: 'Noto Sans TC', 'Segoe UI', system-ui, sans-serif;
    font-size: clamp(0.82rem, 1.6vw, 0.95rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.35;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.pwa-install-trigger:hover {
    border-color: rgba(255, 215, 0, 0.55);
    box-shadow:
        0 0 28px rgba(192, 132, 252, 0.35),
        0 10px 28px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
}

.pwa-install-trigger:active {
    transform: translateY(0);
}

.pwa-install-trigger.hidden {
    display: none !important;
}

.pwa-install-trigger__icon {
    font-size: 1.15em;
    line-height: 1;
}

.pwa-install-trigger__label {
    flex: 1;
    min-width: 0;
}

/* Modal */
.pwa-install-modal {
    position: fixed;
    inset: 0;
    z-index: 12000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
}

.pwa-install-modal.hidden {
    display: none !important;
}

.pwa-install-modal__veil {
    position: absolute;
    inset: 0;
    background: rgba(4, 2, 12, 0.78);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.pwa-install-modal__panel {
    position: relative;
    width: min(720px, 100%);
    max-height: min(88vh, 820px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border-radius: 20px;
    border: 1px solid rgba(192, 132, 252, 0.35);
    background: linear-gradient(165deg, rgba(14, 8, 28, 0.98) 0%, rgba(8, 4, 18, 0.99) 100%);
    box-shadow:
        0 0 0 1px rgba(255, 215, 0, 0.08),
        0 24px 64px rgba(0, 0, 0, 0.55),
        0 0 48px rgba(127, 0, 255, 0.15);
}

.pwa-install-modal__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 22px 22px 16px;
    border-bottom: 1px solid rgba(192, 132, 252, 0.15);
}

.pwa-install-modal__title {
    margin: 0;
    font-family: 'Noto Sans TC', 'Urbanist', sans-serif;
    font-size: clamp(1.05rem, 3.5vw, 1.35rem);
    font-weight: 900;
    letter-spacing: 0.06em;
    line-height: 1.4;
    color: #fff;
    text-shadow: 0 0 20px rgba(192, 132, 252, 0.35);
}

.pwa-install-modal__close {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    margin: 0;
    padding: 0;
    border: 1px solid rgba(192, 132, 252, 0.25);
    border-radius: 10px;
    background: rgba(8, 4, 16, 0.6);
    color: rgba(220, 210, 240, 0.85);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
}

.pwa-install-modal__close:hover {
    color: #fff;
    border-color: rgba(192, 132, 252, 0.5);
}

.pwa-install-modal__body {
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: 18px 22px 24px;
    display: grid;
    gap: 18px;
}

@media (min-width: 640px) {
    .pwa-install-modal__body {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
}

.pwa-install-guide {
    padding: 18px 16px;
    border-radius: 14px;
    border: 1px solid rgba(192, 132, 252, 0.2);
    background: rgba(6, 3, 16, 0.65);
}

.pwa-install-guide--ios {
    border-color: rgba(120, 180, 255, 0.28);
    box-shadow: inset 0 0 24px rgba(80, 140, 255, 0.06);
}

.pwa-install-guide--android {
    border-color: rgba(100, 220, 160, 0.28);
    box-shadow: inset 0 0 24px rgba(80, 200, 140, 0.06);
}

.pwa-install-guide__title {
    margin: 0 0 14px;
    font-family: 'Noto Sans TC', sans-serif;
    font-size: clamp(0.92rem, 2.8vw, 1.05rem);
    font-weight: 900;
    letter-spacing: 0.03em;
    line-height: 1.45;
    color: rgba(248, 244, 255, 0.98);
}

.pwa-install-guide__steps {
    margin: 0;
    padding-left: 1.25em;
    font-family: 'Noto Sans TC', sans-serif;
    font-size: clamp(0.88rem, 2.5vw, 0.98rem);
    font-weight: 500;
    line-height: 1.75;
    letter-spacing: 0.02em;
    color: rgba(225, 218, 245, 0.92);
}

.pwa-install-guide__steps li {
    margin-bottom: 10px;
}

.pwa-install-guide__steps li:last-child {
    margin-bottom: 0;
}

.pwa-install-guide__steps strong {
    font-weight: 800;
    color: #ffe8a8;
}

body.pwa-install-modal-open {
    overflow: hidden;
}

@media (max-width: 1100px) {
    .home-left-pillar {
        width: min(300px, 42vw);
        min-width: 0;
    }
}

@media (max-width: 720px) {
    .home-left-pillar {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        order: -1;
        z-index: 7;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        margin: 0 0 8px;
        padding: 0 2px;
        box-sizing: border-box;
    }

    .home-left-pillar .void-seal-cert--pillar {
        display: none;
    }

    .pwa-install-trigger {
        padding: 10px 14px;
        font-size: 0.84rem;
        border-radius: 12px;
        justify-content: center;
    }

    .pwa-install-trigger__label {
        flex: 0 1 auto;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .pwa-install-trigger {
        transition: none;
    }

    .pwa-install-trigger:hover {
        transform: none;
    }
}