:root {
    --student-pwa-accent: #1f5eff;
    --student-pwa-accent-soft: rgba(31, 94, 255, 0.12);
    --student-pwa-surface: rgba(11, 18, 32, 0.96);
    --student-pwa-border: rgba(255, 255, 255, 0.14);
}

/* Result Hosting [Mr. Shudhanshu Kumar Pandey]: compact, readable PWA prompt. */
.student-pwa-banner {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 16px;
    z-index: 2147483000;
    display: flex;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transform: translate3d(0, 18px, 0) scale(0.985);
    transition: opacity 280ms cubic-bezier(0.22, 1, 0.36, 1), transform 360ms cubic-bezier(0.22, 1, 0.36, 1);
    will-change: opacity, transform;
}

.student-pwa-banner.is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
}

.student-pwa-banner__shell {
    width: min(680px, 100%);
    pointer-events: auto;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    padding: 10px 12px;
    border-radius: 8px;
    background:
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.12), transparent 30%),
        linear-gradient(135deg, rgba(14, 19, 35, 0.98), rgba(23, 40, 86, 0.98) 55%, rgba(31, 94, 255, 0.96));
    color: #fff;
    border: 2px solid var(--student-pwa-border);
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.18);
    backdrop-filter: blur(18px);
}

.student-pwa-banner__icon {
    width: 44px;
    height: 44px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    padding: 3px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.student-pwa-banner__icon img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 5px;
    object-fit: cover;
}

.student-pwa-banner__copy {
    min-width: 0;
    position: relative;
    padding-left: 10px;
}

.student-pwa-banner__copy::before {
    content: '';
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.20);
    pointer-events: none;
}

.student-pwa-banner__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 3px;
    padding: 3px 8px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.10);
    color: rgba(255, 255, 255, 0.88);
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.student-pwa-banner__title {
    font-size: 15px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 2px;
}

.student-pwa-banner__text {
    font-size: 12px;
    line-height: 1.35;
    color: rgba(255, 255, 255, 0.84);
}

.student-pwa-banner__details {
    margin-top: 6px;
    padding: 6px 8px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.09);
    color: rgba(255, 255, 255, 0.94);
    font-size: 11.5px;
    line-height: 1.35;
}

.student-pwa-banner__actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: stretch;
    justify-content: center;
    min-width: 128px;
}

.student-pwa-banner__button {
    appearance: none;
    border: 0;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 800;
    line-height: 1;
    padding: 9px 12px;
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease, background 160ms ease;
    width: 100%;
}

.student-pwa-banner__button:hover {
    transform: translateY(-1px);
}

.student-pwa-banner__button-primary {
    color: #0f172a;
    background: linear-gradient(135deg, #f8fbff 0%, #dbeafe 100%);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.20);
}

.student-pwa-banner__button-secondary {
    color: #fff;
    background: rgba(255, 255, 255, 0.10);
    border: 0;
}

.student-pwa-banner__button-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
}

@media (max-width: 760px) {
    .student-pwa-banner {
        left: 12px;
        right: 12px;
        bottom: 12px;
    }

    .student-pwa-banner__shell {
        grid-template-columns: auto minmax(0, 1fr);
        gap: 10px;
        padding: 11px;
        border-radius: 8px;
    }

    .student-pwa-banner__icon {
        width: 42px;
        height: 42px;
        border-radius: 5px;
    }

    .student-pwa-banner__actions {
        grid-column: 1 / -1;
        min-width: 0;
        flex-direction: row;
    }

    .student-pwa-banner__button {
        flex: 1 1 0;
        min-width: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .student-pwa-banner,
    .student-pwa-banner.is-visible {
        transform: none;
        transition: none;
    }
}

@media (max-width: 460px) {
    .student-pwa-banner__actions {
        flex-direction: column;
    }
}