.sd-ai-float {
    position: fixed;
    inset-block-end: max(24px, env(safe-area-inset-bottom));
    inset-inline-end: 24px;
    z-index: var(--sd-z-fab, 400);
}

@media (max-width: 860px) {
    .sd-ai-float {
        inset-block-end: calc(var(--sd-bottom-nav-h, 64px) + 12px + env(safe-area-inset-bottom, 0px));
        inset-inline-end: 16px;
    }
}

.sd-ai-float__trigger {
    display: inline-flex;
    align-items: center;
    gap: var(--sd-sp-2);
    min-height: var(--sd-tap-min);
    padding: var(--sd-sp-2) var(--sd-sp-4);
    border: 1px solid var(--sd-accent-soft-strong);
    border-radius: var(--sd-radius-md);
    background: var(--sd-bg-elevated-2);
    color: var(--sd-text);
    box-shadow: var(--sd-shadow-md);
    font: inherit;
    font-size: var(--sd-fs-sm);
    font-weight: var(--sd-fw-bold);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.sd-ai-float__trigger:hover {
    transform: translateY(-2px);
    border-color: var(--sd-accent-light);
    box-shadow: var(--sd-shadow-glow);
}

.sd-ai-float__trigger:focus-visible {
    outline: 2px solid var(--sd-accent-light);
    outline-offset: 2px;
}

.sd-ai-float__icon {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: var(--sd-radius-sm);
    background: var(--sd-gradient);
    color: var(--sd-text-on-accent);
    font-size: var(--sd-fs-sm);
}

.sd-ai-float__backdrop {
    position: fixed;
    inset: 0;
    background: var(--sd-bg-overlay, rgba(0, 0, 0, 0.6));
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.sd-ai-float.is-open .sd-ai-float__backdrop {
    opacity: 1;
    visibility: visible;
}

.sd-ai-float__panel,
.sd-ai-float__drawer {
    position: absolute;
    inset-block-end: calc(100% + var(--sd-sp-3));
    inset-inline-end: 0;
    width: min(360px, calc(100vw - 32px));
    max-height: min(70vh, 520px);
    overflow: auto;
    padding: var(--sd-sp-5);
    background: var(--sd-bg-elevated);
    border: 1px solid var(--sd-border-strong);
    border-inline-start: 3px solid var(--sd-brass);
    border-radius: var(--sd-radius-lg);
    box-shadow: var(--sd-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transform-origin: bottom right;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.sd-ai-float.is-open .sd-ai-float__panel,
.sd-ai-float.is-open .sd-ai-float__drawer {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sd-ai-float__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sd-sp-3);
    margin-bottom: var(--sd-sp-3);
}

.sd-ai-float__header h2 {
    margin: 0;
    font-family: var(--sd-font-display, inherit);
    font-size: var(--sd-fs-lg);
}

.sd-ai-float__close {
    width: var(--sd-tap-min);
    height: var(--sd-tap-min);
    border: 0;
    background: transparent;
    color: var(--sd-text-muted);
    font-size: var(--sd-fs-md);
    cursor: pointer;
    border-radius: var(--sd-radius-sm);
}

.sd-ai-float__close:hover { color: var(--sd-danger); background: var(--sd-danger-soft); }

.sd-ai-float__hint,
.sd-ai-float__intro p {
    margin: 0 0 var(--sd-sp-4);
    color: var(--sd-text-secondary);
    font-size: var(--sd-fs-sm);
}

.sd-ai-float__guest-note {
    display: flex;
    align-items: flex-start;
    gap: var(--sd-sp-2);
    padding: var(--sd-sp-3);
    margin-bottom: var(--sd-sp-4) !important;
    background: var(--sd-secondary-soft);
    border-radius: var(--sd-radius-md);
    color: var(--sd-mist-soft) !important;
    font-size: var(--sd-fs-xs) !important;
}

.sd-ai-float__action { margin-top: var(--sd-sp-3); }

.sd-ai-float__summary {
    margin: var(--sd-sp-4) 0;
    padding: var(--sd-sp-4);
    background: var(--sd-bg-elevated-2);
    border-radius: var(--sd-radius-md);
    font-size: var(--sd-fs-sm);
    line-height: 1.75;
    white-space: pre-wrap;
    color: var(--sd-text);
}

.sd-ai-float__summary[hidden] { display: none; }

/* Side panel mode on article/book pages */
.sd-ai-float.is-side-panel .sd-ai-float__panel {
    position: fixed;
    inset-block: 0;
    inset-inline-end: 0;
    inset-block-end: auto;
    width: min(380px, 92vw);
    max-height: 100dvh;
    border-radius: 0;
    border-inline-start: 3px solid var(--sd-brass);
    transform: translateX(105%);
    padding-top: var(--sd-sp-6);
}

[dir="rtl"] .sd-ai-float.is-side-panel .sd-ai-float__panel {
    transform: translateX(-105%);
}

.sd-ai-float.is-side-panel.is-open .sd-ai-float__panel {
    transform: translateX(0);
}

@media (max-width: 600px) {
    .sd-ai-float__trigger {
        width: var(--sd-tap-min);
        height: var(--sd-tap-min);
        padding: 0;
        justify-content: center;
    }
    .sd-ai-float__label {
        position: absolute;
        width: 1px; height: 1px; padding: 0; margin: -1px;
        overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
    }

    /* على شاشة موبايل ضيقة: نافذة Sadeem AI (بوضعيها العادي وside-panel) تصبح
       طبقة كاملة الشاشة فعلياً بدل نافذة صغيرة/جانبية جزئية قد تتراكب مع المحتوى. */
    .sd-ai-float__panel,
    .sd-ai-float.is-side-panel .sd-ai-float__panel,
    .sd-ai-float__drawer {
        position: fixed;
        inset: 0;
        width: 100%;
        max-width: none;
        max-height: 100dvh;
        border-radius: 0;
        border-inline-start: 0;
        padding-top: var(--sd-sp-6);
        transform: translateY(100%);
        transform-origin: bottom center;
    }

    .sd-ai-float.is-open .sd-ai-float__panel,
    .sd-ai-float.is-side-panel.is-open .sd-ai-float__panel,
    .sd-ai-float.is-open .sd-ai-float__drawer {
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .sd-ai-float__trigger,
    .sd-ai-float__panel,
    .sd-ai-float__drawer { transition: none; }
}