/* ============================================================
   APP INSTALL BANNER — Modern Professional Design System
   ============================================================ */

:root {

    --pa-ink: #1c2b25;
    --pa-ink-soft: #3a4d44;
    --pa-ink-muted: #6b7f76;
    --pa-ink-faint: #9baea5;

    --pa-line: #d9e3dd;
    --pa-line-soft: #eef4f0;

    --pa-surface: #fbfaf7;
    --pa-surface-raised: #ffffff;
    --pa-surface-sunken: #f5f3ee;

    --pa-accent: #0d6e54;
    --pa-accent-hover: #0b5c47;
    --pa-accent-pressed: #084d3b;
    --pa-accent-contrast: #f0fdf6;

    --pa-badge-bg: #e6f2ec;
    --pa-badge-ink: #0d6e54;

    --pa-radius-sm: 8px;
    --pa-radius-md: 12px;
    --pa-radius-lg: 16px;
    --pa-radius-xl: 20px;
    --pa-radius-pill: 999px;

    --pa-shadow-banner:
        0 1px 2px rgba(28, 43, 37, 0.05),
        0 4px 16px rgba(28, 43, 37, 0.07);

    --pa-shadow-icon:
        0 1px 3px rgba(28, 43, 37, 0.1),
        0 1px 2px rgba(28, 43, 37, 0.05);

    --pa-shadow-button:
        0 1px 2px rgba(13, 110, 84, 0.12),
        0 2px 6px rgba(13, 110, 84, 0.08);

    --pa-shadow-button-hover:
        0 4px 14px rgba(13, 110, 84, 0.22),
        0 2px 6px rgba(13, 110, 84, 0.12);

    --pa-shadow-modal:
        0 24px 64px -12px rgba(28, 43, 37, 0.3),
        0 8px 24px -8px rgba(28, 43, 37, 0.14);

    --pa-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --pa-ease-out: cubic-bezier(0.16, 1, 0.3, 1);

    --pa-dur-fast: 0.15s;
    --pa-dur: 0.2s;
    --pa-dur-slow: 0.3s;

    --pa-font: inherit;

    --pa-tracking-tight: -0.01em;
    --pa-tracking-normal: 0;
    --pa-tracking-wide: 0.02em;
}


/* ============================================================
   APP INSTALL CONTAINER
   ============================================================ */

#panelAppInstallButton {

    position: fixed !important;

    /*
     * Banner is intentionally placed BELOW the existing header.
     *
     * If your panel defines --panel-app-header-height,
     * that value will automatically be used.
     */

    top: var(
        --panel-app-header-height,
        64px
    ) !important;

    right: 0 !important;
    left: 0 !important;

    bottom: auto !important;

    z-index: 9998 !important;

    display: none;

    width: 100% !important;

    margin: 0 !important;
    padding: 0 !important;

    box-sizing: border-box !important;

    border: 0 !important;
    border-radius: 0 !important;

    background: transparent !important;

    color: inherit !important;

    font-family: inherit !important;
    font-size: inherit !important;
    font-weight: inherit !important;

    line-height: normal !important;

    text-align: left !important;

    cursor: default !important;

    box-shadow: none !important;

    overflow: visible !important;

    transform: none !important;

    transition: none !important;

    -webkit-tap-highlight-color: transparent;
}


/* ============================================================
   BANNER
   ============================================================ */

#panelAppInstallButton .panel-app-install-banner {

    position: relative;

    display: flex;

    align-items: center;

    width: 100%;

    min-height: 72px;

    gap: 16px;

    margin: 0;

    padding: 12px 24px;

    box-sizing: border-box;

    background: var(--pa-surface);

    color: var(--pa-ink);

    border-top:
        1px solid var(--pa-line);

    border-bottom:
        1px solid var(--pa-line);

    box-shadow:
        var(--pa-shadow-banner);

    -webkit-font-smoothing: antialiased;

    -moz-osx-font-smoothing: grayscale;
}


/* ============================================================
   APP ICON
   ============================================================ */

#panelAppInstallButton .panel-app-install-icon {

    flex: 0 0 52px;

    width: 52px;
    height: 52px;

    display: block;

    margin: 0;
    padding: 0;

    object-fit: cover;

    border-radius:
        var(--pa-radius-md);

    background:
        var(--pa-line-soft);

    border:
        1px solid var(--pa-line);

    box-shadow:
        var(--pa-shadow-icon);
}


/* ============================================================
   APP INFO
   ============================================================ */

#panelAppInstallButton .panel-app-install-info {

    flex: 1 1 auto;

    min-width: 0;

    display: flex;

    flex-direction: column;

    justify-content: center;

    gap: 3px;

    margin: 0;
    padding: 0;

    overflow: hidden;
}


/* App Name */

#panelAppInstallButton .panel-app-install-title {

    display: block;

    width: 100%;

    margin: 0;
    padding: 0;

    color:
        var(--pa-ink);

    font-family:
        var(--pa-font);

    font-size: 15px;

    font-weight: 600;

    line-height: 1.35;

    letter-spacing:
        var(--pa-tracking-tight);

    white-space: nowrap;

    overflow: hidden;

    text-overflow: ellipsis;
}


/* Optional Subtitle */

#panelAppInstallButton .panel-app-install-subtitle {

    display: block;

    width: 100%;

    margin: 0;
    padding: 0;

    color:
        var(--pa-ink-muted);

    font-family:
        var(--pa-font);

    font-size: 12.5px;

    font-weight: 400;

    line-height: 1.35;

    white-space: nowrap;

    overflow: hidden;

    text-overflow: ellipsis;
}


/* ============================================================
   INSTALL ACTION
   ============================================================ */

#panelAppInstallButton .panel-app-install-action {

    flex: 0 0 auto;

    min-width: 88px;

    min-height: 40px;

    display: inline-flex;

    align-items: center;

    justify-content: center;

    margin: 0;

    padding: 10px 18px;

    box-sizing: border-box;

    border: 0;

    border-radius:
        var(--pa-radius-sm);

    background:
        var(--pa-accent);

    color:
        var(--pa-accent-contrast);

    font-family:
        var(--pa-font);

    font-size: 13px;

    font-weight: 600;

    line-height: 1.3;

    letter-spacing:
        var(--pa-tracking-wide);

    text-align: center;

    white-space: nowrap;

    cursor: pointer;

    user-select: none;

    -webkit-user-select: none;

    box-shadow:
        var(--pa-shadow-button);

    transition:
        background var(--pa-dur-fast) var(--pa-ease),
        box-shadow var(--pa-dur) var(--pa-ease),
        transform var(--pa-dur-fast) var(--pa-ease);
}


#panelAppInstallButton .panel-app-install-action:hover {

    background:
        var(--pa-accent-hover);

    box-shadow:
        var(--pa-shadow-button-hover);
}


#panelAppInstallButton .panel-app-install-action:active {

    background:
        var(--pa-accent-pressed);

    transform:
        translateY(1px);

    box-shadow:
        var(--pa-shadow-button);
}


#panelAppInstallButton .panel-app-install-action:focus-visible {

    outline:
        2px solid var(--pa-accent);

    outline-offset: 3px;
}


/* ============================================================
   CLOSE BUTTON
   ============================================================ */

#panelAppInstallButton .panel-app-install-close {

    flex: 0 0 34px;

    width: 34px;
    height: 34px;

    display: inline-flex;

    align-items: center;
    justify-content: center;

    margin: 0;
    padding: 0;

    box-sizing: border-box;

    border: 0;

    border-radius:
        var(--pa-radius-sm);

    background: transparent;

    color:
        var(--pa-ink-muted);

    font-family:
        var(--pa-font);

    font-size: 22px;

    font-weight: 400;

    line-height: 1;

    text-align: center;

    cursor: pointer;

    user-select: none;

    -webkit-user-select: none;

    transition:
        background var(--pa-dur-fast) var(--pa-ease),
        color var(--pa-dur-fast) var(--pa-ease);
}


#panelAppInstallButton .panel-app-install-close:hover {

    background:
        var(--pa-line-soft);

    color:
        var(--pa-ink);
}


#panelAppInstallButton .panel-app-install-close:active {

    background:
        var(--pa-line);
}


#panelAppInstallButton .panel-app-install-close:focus-visible {

    outline:
        2px solid var(--pa-accent);

    outline-offset: 2px;
}


/* ============================================================
   INSTALLATION OVERLAY
   ============================================================ */

.panel-app-install-overlay {

    position: fixed;

    inset: 0;

    z-index: 100000;

    display: flex;

    align-items: center;

    justify-content: center;

    width: 100%;
    height: 100%;

    padding: 20px;

    box-sizing: border-box;

    background:
        rgba(28, 43, 37, 0.5);

    -webkit-backdrop-filter:
        blur(4px);

    backdrop-filter:
        blur(4px);

    overflow-y: auto;

    -webkit-overflow-scrolling: touch;

    animation:
        paOverlayIn
        var(--pa-dur)
        var(--pa-ease)
        forwards;
}


/* ============================================================
   MODAL
   ============================================================ */

.panel-app-install-modal {

    width: 100%;

    max-width: 400px;

    max-height:
        calc(100vh - 40px);

    overflow: hidden;

    box-sizing: border-box;

    border-radius:
        var(--pa-radius-lg);

    background:
        var(--pa-surface-raised);

    color:
        var(--pa-ink);

    box-shadow:
        var(--pa-shadow-modal);

    animation:
        paModalIn
        var(--pa-dur-slow)
        var(--pa-ease-out)
        forwards;

    -webkit-font-smoothing: antialiased;

    -moz-osx-font-smoothing: grayscale;
}


.panel-app-install-modal,
.panel-app-install-modal * {

    box-sizing: border-box;
}


/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes paModalIn {

    from {

        opacity: 0;

        transform:
            translateY(12px)
            scale(0.96);

    }

    to {

        opacity: 1;

        transform:
            translateY(0)
            scale(1);

    }

}


@keyframes paOverlayIn {

    from {

        opacity: 0;

    }

    to {

        opacity: 1;

    }

}


/* ============================================================
   MODAL HEADER
   ============================================================ */

.panel-app-install-header {

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 16px;

    padding:
        20px 22px;

    border-bottom:
        1px solid var(--pa-line);
}


.panel-app-install-header h4 {

    flex: 1;

    min-width: 0;

    margin: 0;
    padding: 0;

    color:
        var(--pa-ink);

    font-family:
        var(--pa-font);

    font-size: 17px;

    font-weight: 600;

    line-height: 1.4;

    letter-spacing:
        var(--pa-tracking-tight);
}


/* ============================================================
   MODAL CLOSE
   ============================================================ */

.panel-app-install-modal .panel-app-install-close {

    flex: 0 0 32px;

    width: 32px;
    height: 32px;

    display: inline-flex;

    align-items: center;
    justify-content: center;

    padding: 0;

    border: 0;

    border-radius:
        var(--pa-radius-sm);

    background: transparent;

    color:
        var(--pa-ink-muted);

    font-family:
        var(--pa-font);

    font-size: 22px;

    font-weight: 400;

    line-height: 1;

    cursor: pointer;

    transition:
        background var(--pa-dur-fast) var(--pa-ease),
        color var(--pa-dur-fast) var(--pa-ease);
}


.panel-app-install-modal .panel-app-install-close:hover {

    background:
        var(--pa-line-soft);

    color:
        var(--pa-ink);
}


.panel-app-install-modal .panel-app-install-close:focus-visible {

    outline:
        2px solid var(--pa-accent);

    outline-offset: 2px;
}


/* ============================================================
   MODAL CONTENT
   ============================================================ */

.panel-app-install-content {

    padding:
        22px;

    overflow-y: auto;

    -webkit-overflow-scrolling: touch;
}


.panel-app-install-content p {

    margin:
        0 0 20px 0;

    padding: 0;

    color:
        var(--pa-ink-muted);

    font-family:
        var(--pa-font);

    font-size: 14px;

    line-height: 1.6;
}


/* ============================================================
   IOS STEPS
   ============================================================ */

.panel-ios-step {

    display: flex;

    align-items: flex-start;

    gap: 14px;

    margin:
        0 0 16px 0;

    padding: 0;

    color:
        var(--pa-ink-soft);

    font-family:
        var(--pa-font);

    font-size: 14px;

    line-height: 1.6;
}


.panel-ios-step:last-child {

    margin-bottom: 0;
}


.panel-ios-step > strong:first-child {

    flex: 0 0 26px;

    width: 26px;
    height: 26px;

    display: inline-flex;

    align-items: center;
    justify-content: center;

    margin-top: 0;

    border-radius:
        var(--pa-radius-pill);

    background:
        var(--pa-badge-bg);

    color:
        var(--pa-badge-ink);

    font-size: 12px;

    font-weight: 600;

    line-height: 1;
}


.panel-ios-step span {

    flex: 1;

    min-width: 0;

    padding-top: 3px;
}


.panel-ios-step span strong {

    color:
        var(--pa-ink);

    font-weight: 600;
}


/* ============================================================
   MODAL FOOTER
   ============================================================ */

.panel-app-install-footer {

    padding:
        16px 22px;

    border-top:
        1px solid var(--pa-line);
}


/* ============================================================
   DONE BUTTON
   ============================================================ */

.panel-app-install-done {

    width: 100%;

    min-height: 44px;

    display: inline-flex;

    align-items: center;

    justify-content: center;

    padding:
        12px 18px;

    border: 0;

    border-radius:
        var(--pa-radius-sm);

    background:
        var(--pa-accent);

    color:
        var(--pa-accent-contrast);

    font-family:
        var(--pa-font);

    font-size: 14px;

    font-weight: 600;

    line-height: 1.4;

    letter-spacing:
        var(--pa-tracking-wide);

    cursor: pointer;

    box-shadow:
        var(--pa-shadow-button);

    transition:
        background var(--pa-dur-fast) var(--pa-ease),
        box-shadow var(--pa-dur) var(--pa-ease),
        transform var(--pa-dur-fast) var(--pa-ease);
}


.panel-app-install-done:hover {

    background:
        var(--pa-accent-hover);

    box-shadow:
        var(--pa-shadow-button-hover);
}


.panel-app-install-done:active {

    background:
        var(--pa-accent-pressed);

    transform:
        translateY(1px);

    box-shadow:
        var(--pa-shadow-button);
}


.panel-app-install-done:focus-visible {

    outline:
        2px solid var(--pa-accent);

    outline-offset: 3px;
}


/* ============================================================
   TABLET
   ============================================================ */

@media (max-width: 768px) {

    #panelAppInstallButton {

        top:
            var(
                --panel-app-header-height,
                64px
            ) !important;

    }


    #panelAppInstallButton
    .panel-app-install-banner {

        min-height: 68px;

        gap: 12px;

        padding:
            10px 16px;

    }


    #panelAppInstallButton
    .panel-app-install-icon {

        flex: 0 0 48px;

        width: 48px;
        height: 48px;

        border-radius:
            var(--pa-radius-md);

    }


    #panelAppInstallButton
    .panel-app-install-title {

        font-size: 14.5px;

    }


    #panelAppInstallButton
    .panel-app-install-action {

        min-width: 80px;

        min-height: 38px;

        padding:
            9px 14px;

        font-size: 12.5px;

    }


    #panelAppInstallButton
    .panel-app-install-close {

        flex: 0 0 30px;

        width: 30px;
        height: 30px;

        font-size: 20px;

    }

}


/* ============================================================
   MOBILE
   ============================================================ */

@media (max-width: 576px) {

    #panelAppInstallButton {

        top:
            var(
                --panel-app-header-height,
                60px
            ) !important;

    }


    #panelAppInstallButton
    .panel-app-install-banner {

        min-height: 64px;

        gap: 10px;

        padding:
            8px 14px;

    }


    #panelAppInstallButton
    .panel-app-install-icon {

        flex: 0 0 44px;

        width: 44px;
        height: 44px;

        border-radius: 11px;

    }


    #panelAppInstallButton
    .panel-app-install-title {

        font-size: 14px;

    }


    #panelAppInstallButton
    .panel-app-install-subtitle {

        font-size: 11.5px;

    }


    #panelAppInstallButton
    .panel-app-install-action {

        min-width: 72px;

        min-height: 36px;

        padding:
            8px 12px;

        font-size: 12px;

    }


    #panelAppInstallButton
    .panel-app-install-close {

        flex: 0 0 28px;

        width: 28px;
        height: 28px;

        font-size: 20px;

    }


    .panel-app-install-overlay {

        align-items: flex-end;

        padding: 12px;

    }


    .panel-app-install-modal {

        max-width: 100%;

        max-height:
            calc(100vh - 24px);

        border-radius:
            14px 14px 0 0;

    }


    .panel-app-install-header {

        padding:
            18px 20px;

    }


    .panel-app-install-content {

        padding: 20px;

    }


    .panel-app-install-footer {

        padding:
            14px 20px;

    }

}


/* ============================================================
   SMALL MOBILE
   ============================================================ */

@media (max-width: 380px) {

    #panelAppInstallButton {

        top:
            var(
                --panel-app-header-height,
                56px
            ) !important;

    }


    #panelAppInstallButton
    .panel-app-install-banner {

        min-height: 60px;

        gap: 8px;

        padding:
            7px 12px;

    }


    #panelAppInstallButton
    .panel-app-install-icon {

        flex: 0 0 40px;

        width: 40px;
        height: 40px;

        border-radius: 10px;

    }


    #panelAppInstallButton
    .panel-app-install-title {

        font-size: 13px;

    }


    #panelAppInstallButton
    .panel-app-install-subtitle {

        font-size: 11px;

    }


    #panelAppInstallButton
    .panel-app-install-action {

        min-width: 66px;

        min-height: 34px;

        padding:
            7px 10px;

        font-size: 11px;

    }


    #panelAppInstallButton
    .panel-app-install-close {

        flex: 0 0 26px;

        width: 26px;
        height: 26px;

        font-size: 19px;

    }


    .panel-app-install-header h4 {

        font-size: 16px;

    }


    .panel-app-install-content p {

        font-size: 13px;

    }


    .panel-ios-step {

        font-size: 13px;

        gap: 12px;

    }

}


/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {

    #panelAppInstallButton
    .panel-app-install-action,

    #panelAppInstallButton
    .panel-app-install-close,

    .panel-app-install-modal
    .panel-app-install-close,

    .panel-app-install-done {

        transition: none;

    }


    .panel-app-install-modal,

    .panel-app-install-overlay {

        animation: none;

    }

}