/* ==========================================================================
   assets/css/chat.css
   المساعد الذكي «سحاب» — طابع تحريري هادئ (حبر داكن + لمسات تيراكوتا)
   كل المتغيرات محصورة داخل .sahab-chat حتى لا تتأثر ببقية الموقع.
   ========================================================================== */

.sahab-chat {
    --chat-ink: #142536;
    --chat-ink-2: #1D2D52;
    --chat-accent: #88633F;
    --chat-paper: #F7F3EC;
    --chat-surface: #FFFFFF;
    --chat-border: #E5DED2;
    --chat-text: #1B2333;
    --chat-muted: #6B7280;
    --chat-on-ink: #FFFFFF;
    --chat-on-ink-muted: rgba(255, 255, 255, .68);
    --chat-shadow: 0 10px 30px rgba(20, 33, 61, .25);
    --chat-panel-shadow: 0 24px 60px rgba(20, 33, 61, .22), 0 2px 8px rgba(20, 33, 61, .08);
    --chat-radius: 16px;
    --chat-bubble-radius: 14px;
    --chat-font-display: var(--font-display, 'Amiri', serif);
    --chat-font-body: var(--font-body, 'Tajawal', system-ui, sans-serif);
    --chat-ease: cubic-bezier(.2, .7, .2, 1);
    --chat-bottom: 24px;
    --chat-side: 24px;

    font-family: var(--chat-font-body);
    color: var(--chat-text);
    line-height: 1.6;
}

[data-theme="dark"] .sahab-chat {
    --chat-ink: #0B1220;
    --chat-ink-2: #172036;
    --chat-accent: #D9774F;
    --chat-paper: #111827;
    --chat-surface: #1A2233;
    --chat-border: #2A3447;
    --chat-text: #EDE8DF;
    --chat-muted: #9CA3AF;
    --chat-shadow: 0 10px 30px rgba(0, 0, 0, .45);
    --chat-panel-shadow: 0 24px 60px rgba(0, 0, 0, .55), 0 0 0 1px #2A3447;
}

.sahab-chat *,
.sahab-chat *::before,
.sahab-chat *::after { box-sizing: border-box; }

.sahab-chat [hidden] { display: none !important; }

/* Assistant, inbox, and WhatsApp share one accessible contact hub. */
.sahab-channels { display: flex; gap: 5px; padding: 10px 14px; background: var(--chat-surface); border-bottom: 1px solid var(--chat-border); flex: 0 0 auto; }
.sahab-channels button { flex: 1; border: 1px solid transparent; border-radius: 9px; padding: 9px 6px; font-size: 13px; background: transparent; color: var(--chat-muted); cursor: pointer; }
.sahab-channels button[aria-pressed="true"] { background: var(--chat-ink); color: #fff; }
.sahab-channels button:hover { border-color: var(--chat-border); }
.sahab-support { flex: 1; min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 20px; background: var(--chat-paper); }
.sahab-support h3 { font: 700 18px/1.6 var(--chat-font-body); margin: 0 0 8px; color: var(--chat-text); }
.sahab-support-hint { font-size: 13px; color: var(--chat-muted); margin: 0 0 16px; }
.sahab-support-form { display: grid; gap: 13px; }
.sahab-support-field { display: grid; gap: 6px; font-size: 13px; color: var(--chat-text); }
.sahab-support-field input, .sahab-support-field select, .sahab-support-field textarea { width: 100%; min-width: 0; font: 14px/1.6 var(--chat-font-body); background: var(--chat-surface); color: var(--chat-text); border: 1px solid var(--chat-border); border-radius: 9px; padding: 10px 12px; }
.sahab-support-field textarea { resize: vertical; min-height: 110px; max-height: 240px; }
.sahab-summary-opt { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--chat-muted); }
.sahab-summary-opt input { width: 16px; height: 16px; accent-color: var(--chat-accent); }
.sahab-support-submit { min-height: 46px; border: 0; border-radius: 10px; background: var(--chat-ink); color: white; cursor: pointer; padding: 12px; }
.sahab-support-submit:disabled { opacity: .5; cursor: wait; }
.sahab-support-status { font-size: 13px; margin-top: 14px; white-space: pre-wrap; }
.sahab-launcher-face img { border-radius: 13px; }
@media (prefers-reduced-motion: no-preference) {
    .sahab-launcher-face img { animation:sahab-breathe 6s ease-in-out infinite; }
    .sahab-launcher::after { content:"✦"; position:absolute; top:-3px; inset-inline-end:-2px; color:#ddc39c; font-size:18px; pointer-events:none; animation:sahab-star 5s ease-in-out infinite; }
    .sahab-chat.is-open .sahab-launcher::after { animation:none; }
    .sahab-chat.is-thinking .sahab-head-avatar img { animation:sahab-think 1.4s ease-in-out infinite; }
    .sahab-chat.is-thinking .sahab-online { animation:sahab-star 1s ease-in-out infinite; }
    @keyframes sahab-breathe { 0%,75%,100%{transform:none} 82%{transform:translateY(-3px) rotate(-7deg)} 90%{transform:translateY(-2px) rotate(6deg)} }
    @keyframes sahab-star { 50%{opacity:.35;transform:scale(.8) rotate(25deg)} }
    @keyframes sahab-think { 50%{transform:translateY(-3px) rotate(-5deg)} }
}

.sahab-sr {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}

.sahab-chat button { font: inherit; }

.sahab-chat :focus-visible {
    outline: 2px solid var(--chat-accent);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   الزر العائم: يمين الصفحة في LTR ويسارها في RTL (inline-end)
   زر «العودة للأعلى» على inline-start لذلك لا يتداخلان.
   -------------------------------------------------------------------------- */
.sahab-launcher {
    position: fixed;
    inset-block-end: var(--chat-bottom);
    inset-inline-end: var(--chat-side);
    z-index: 9000;
    width: 60px; height: 60px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--chat-ink);
    box-shadow: var(--chat-shadow);
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: transform .25s var(--chat-ease), box-shadow .25s var(--chat-ease), opacity .2s;
}
.sahab-launcher:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(20, 33, 61, .3); }
.sahab-launcher:active { transform: translateY(0) scale(.97); }

.sahab-launcher-face {
    width: 46px; height: 46px;
    border-radius: 50%;
    background: #FFFFFF;
    display: grid;
    place-items: center;
    overflow: hidden;
}
.sahab-launcher-face img { width: 38px; height: 38px; display: block; }

[data-theme="dark"] .sahab-launcher { box-shadow: var(--chat-shadow), 0 0 0 1px #2A3447; }

/* نبضة حلقة واحدة عند أول تحميل في الجلسة */
.sahab-launcher.is-intro::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 2px solid var(--chat-accent);
    opacity: 0;
    animation: sahab-ring 1.6s var(--chat-ease) .8s 1;
    pointer-events: none;
}
@keyframes sahab-ring {
    0%   { opacity: .9; transform: scale(1); }
    100% { opacity: 0;  transform: scale(1.35); }
}

.sahab-unread {
    position: absolute;
    inset-block-start: 3px;
    inset-inline-end: 3px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--chat-accent);
    border: 2px solid var(--chat-ink);
    transform: scale(0);
    transition: transform .2s var(--chat-ease);
}
.sahab-launcher .sahab-sr { display: none; }
.sahab-launcher.has-unread .sahab-unread { transform: scale(1); }
.sahab-launcher.has-unread .sahab-sr { display: inline; }

/* عند فتح النافذة على سطح المكتب يبقى الزر ظاهراً لإغلاقها */
.sahab-chat.is-open .sahab-launcher { box-shadow: 0 6px 18px rgba(20, 33, 61, .2); }

/* --------------------------------------------------------------------------
   التلميح الترحيبي
   -------------------------------------------------------------------------- */
.sahab-tip {
    position: fixed;
    inset-block-end: calc(var(--chat-bottom) + 72px);
    inset-inline-end: var(--chat-side);
    z-index: 9000;
    max-width: 260px;
    display: flex;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 8px 12px 14px;
    padding-inline: 14px 8px;
    background: var(--chat-surface);
    color: var(--chat-text);
    border: 1px solid var(--chat-border);
    border-radius: 12px;
    box-shadow: 0 12px 30px rgba(20, 33, 61, .14);
    opacity: 0;
    transform: translateY(6px);
    transition: opacity .2s var(--chat-ease), transform .2s var(--chat-ease);
}
.sahab-tip.is-visible { opacity: 1; transform: none; }
.sahab-tip::after {
    content: "";
    position: absolute;
    inset-block-end: -6px;
    inset-inline-end: 24px;
    width: 10px; height: 10px;
    background: var(--chat-surface);
    border-inline-end: 1px solid var(--chat-border);
    border-block-end: 1px solid var(--chat-border);
    transform: rotate(45deg);
}
.sahab-tip-text {
    flex: 1;
    background: none;
    border: 0;
    padding: 0;
    color: inherit;
    font-size: .92rem;
    font-weight: 500;
    text-align: start;
    cursor: pointer;
    line-height: 1.55;
}
.sahab-tip-close {
    flex: none;
    width: 24px; height: 24px;
    display: grid; place-items: center;
    border: 0; border-radius: 50%;
    background: transparent;
    color: var(--chat-muted);
    cursor: pointer;
}
.sahab-tip-close:hover { background: rgba(107, 114, 128, .12); color: var(--chat-text); }

/* --------------------------------------------------------------------------
   النافذة
   -------------------------------------------------------------------------- */
.sahab-panel {
    position: fixed;
    inset-block-end: calc(var(--chat-bottom) + 72px);
    inset-inline-end: var(--chat-side);
    z-index: 9001;
    width: 380px;
    height: 600px;
    max-height: calc(100vh - var(--chat-bottom) - 96px);
    max-height: calc(100dvh - var(--chat-bottom) - 96px);
    display: flex;
    flex-direction: column;
    background: var(--chat-paper);
    border: 1px solid var(--chat-border);
    border-radius: var(--chat-radius);
    box-shadow: var(--chat-panel-shadow);
    overflow: hidden;
    opacity: 0;
    transform: translateY(12px);
    transform-origin: bottom right;
    transition: opacity .2s var(--chat-ease), transform .22s var(--chat-ease);
}
.sahab-chat[dir="rtl"] .sahab-panel { transform-origin: bottom left; }
.sahab-chat.is-open .sahab-panel { opacity: 1; transform: none; }

/* الرأس */
.sahab-head {
    flex: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 14px 14px 16px;
    padding-inline: 16px 10px;
    background: var(--chat-ink);
    color: var(--chat-on-ink);
}
.sahab-head-avatar {
    flex: none;
    width: 42px; height: 42px;
    border-radius: 50%;
    background: #FFFFFF;
    display: grid; place-items: center;
    overflow: hidden;
}
.sahab-head-avatar img { width: 34px; height: 34px; display: block; }
.sahab-head-text { flex: 1; min-width: 0; }
.sahab-title {
    margin: 0;
    font-family: var(--chat-font-display);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.6;
    padding-top: 2px;
    color: var(--chat-on-ink);
    letter-spacing: 0;
}
.sahab-subtitle {
    margin: 2px 0 0;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    color: var(--chat-on-ink-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sahab-online {
    flex: none;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: #4ADE80;
}
.sahab-head-actions { display: flex; gap: 2px; }
.sahab-icon-btn {
    width: 36px; height: 36px;
    display: grid; place-items: center;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--chat-on-ink-muted);
    cursor: pointer;
    transition: background .15s, color .15s;
}
.sahab-icon-btn:hover { background: rgba(255, 255, 255, .1); color: var(--chat-on-ink); }

/* سجل الرسائل */
.sahab-log {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px 14px 10px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scroll-behavior: smooth;
}
.sahab-log:focus { outline: none; }
.sahab-log:focus-visible { outline: 2px solid var(--chat-accent); outline-offset: -2px; }
.sahab-log::-webkit-scrollbar { width: 6px; }
.sahab-log::-webkit-scrollbar-thumb { background: var(--chat-border); border-radius: 6px; }

.sahab-msg {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    max-width: 100%;
    animation: sahab-in .22s var(--chat-ease);
}
@keyframes sahab-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: none; }
}
.sahab-msg.is-user { flex-direction: row-reverse; }

.sahab-msg-avatar {
    flex: none;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: #FFFFFF;
    border: 1px solid var(--chat-border);
    display: grid; place-items: center;
    overflow: hidden;
    margin-block-start: 2px;
}
.sahab-msg-avatar img { width: 22px; height: 22px; display: block; }

.sahab-msg-body {
    min-width: 0;
    max-width: calc(100% - 40px);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
}
.sahab-msg.is-user .sahab-msg-body { align-items: flex-end; max-width: 82%; }

.sahab-bubble {
    padding: 10px 14px;
    border-radius: var(--chat-bubble-radius);
    font-size: .94rem;
    line-height: 1.7;
    overflow-wrap: anywhere;
    background: var(--chat-surface);
    color: var(--chat-text);
    border: 1px solid var(--chat-border);
    border-start-start-radius: 4px;
}
.sahab-bubble strong { font-weight: 700; color: inherit; }
.sahab-bubble a {
    color: var(--chat-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    word-break: break-all;
}
.sahab-msg.is-user .sahab-bubble {
    background: var(--chat-ink);
    border-color: var(--chat-ink);
    color: var(--chat-on-ink);
    border-start-start-radius: var(--chat-bubble-radius);
    border-start-end-radius: 4px;
    white-space: pre-wrap;
}
[data-theme="dark"] .sahab-msg.is-user .sahab-bubble { background: #2B3A5C; border-color: #2B3A5C; }

.sahab-msg.is-error .sahab-bubble {
    border-color: color-mix(in srgb, var(--chat-accent) 45%, var(--chat-border));
    background: color-mix(in srgb, var(--chat-accent) 6%, var(--chat-surface));
}

.sahab-time {
    font-size: .7rem;
    color: var(--chat-muted);
    padding-inline: 4px;
    font-variant-numeric: tabular-nums;
}

.sahab-retry {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border: 1px solid var(--chat-accent);
    border-radius: 999px;
    background: transparent;
    color: var(--chat-accent);
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
}
.sahab-retry:hover { background: color-mix(in srgb, var(--chat-accent) 8%, transparent); }

/* مؤشر الكتابة */
.sahab-dots { display: inline-flex; gap: 4px; padding: 4px 2px; }
.sahab-dots i {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--chat-muted);
    animation: sahab-bounce 1.2s infinite ease-in-out;
}
.sahab-dots i:nth-child(2) { animation-delay: .15s; }
.sahab-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes sahab-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: .45; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* شرائح الاقتراحات */
.sahab-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-block-start: 2px;
}
.sahab-chip {
    padding: 6px 13px;
    border: 1px solid var(--chat-border);
    border-radius: 999px;
    background: var(--chat-surface);
    color: var(--chat-text);
    font-size: .84rem;
    font-weight: 500;
    line-height: 1.4;
    cursor: pointer;
    transition: border-color .15s, color .15s, background .15s;
}
.sahab-chip:hover {
    border-color: var(--chat-accent);
    color: var(--chat-accent);
}

/* بطاقات الكتب */
.sahab-books {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    min-width: 250px;
}
.sahab-book {
    display: grid;
    grid-template-columns: 48px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 8px;
    padding-inline-end: 12px;
    background: var(--chat-surface);
    border: 1px solid var(--chat-border);
    border-radius: 12px;
    color: var(--chat-text);
    text-decoration: none;
    transition: border-color .15s, transform .15s var(--chat-ease);
}
.sahab-book:hover { border-color: var(--chat-accent); transform: translateY(-1px); }
.sahab-book-cover {
    width: 48px; height: 66px;
    border-radius: 4px;
    overflow: hidden;
    background: var(--chat-paper);
    box-shadow: 0 1px 2px rgba(20, 33, 61, .18), inset -2px 0 0 rgba(0, 0, 0, .06);
    display: grid; place-items: center;
}
.sahab-book-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sahab-book-cover.is-placeholder { color: #FFFFFF; }
.sahab-book-cover.tone-0 { background: #14213D; }
.sahab-book-cover.tone-1 { background: #8A3F22; }
.sahab-book-cover.tone-2 { background: #3F5246; }
.sahab-book-cover.tone-3 { background: #5B4B3A; }
.sahab-book-initial {
    font-family: var(--chat-font-display);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    opacity: .92;
}
.sahab-book-info { min-width: 0; display: flex; flex-direction: column; gap: 1px; }
.sahab-book-title {
    font-family: var(--chat-font-display);
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sahab-book-author {
    font-size: .78rem;
    color: var(--chat-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sahab-book-price {
    font-size: .84rem;
    font-weight: 700;
    color: var(--chat-text);
    font-variant-numeric: tabular-nums;
}
.sahab-book-link {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    font-size: .76rem;
    font-weight: 600;
    color: var(--chat-accent);
    white-space: nowrap;
}

/* حقل الكتابة */
.sahab-compose {
    flex: none;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    margin: 0;
    padding: 10px 12px;
    background: var(--chat-surface);
    border-top: 1px solid var(--chat-border);
}
.sahab-input {
    flex: 1;
    min-height: 42px;
    max-height: 120px;
    resize: none;
    margin: 0;
    padding: 10px 14px;
    border: 1px solid var(--chat-border);
    border-radius: 12px;
    background: var(--chat-paper);
    color: var(--chat-text);
    font: inherit;
    font-size: .94rem;
    line-height: 1.45;
    box-shadow: none;
    transition: border-color .15s, background .15s;
}
.sahab-input::placeholder { color: var(--chat-muted); opacity: 1; }
.sahab-input:focus {
    outline: none;
    border-color: var(--chat-accent);
    background: var(--chat-surface);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--chat-accent) 15%, transparent);
}
.sahab-send {
    flex: none;
    width: 42px; height: 42px;
    display: grid; place-items: center;
    border: 0;
    border-radius: 12px;
    background: var(--chat-ink);
    color: #FFFFFF;
    cursor: pointer;
    transition: opacity .15s, transform .15s;
}
[data-theme="dark"] .sahab-send { background: #2B3A5C; }
.sahab-send:hover:not(:disabled) { transform: translateY(-1px); }
.sahab-send:disabled { opacity: .4; cursor: default; }
.sahab-chat[dir="rtl"] .sahab-send svg { transform: scaleX(-1); }

.sahab-disclaimer {
    flex: none;
    margin: 0;
    padding: 0 14px 8px;
    background: var(--chat-surface);
    font-size: .7rem;
    color: var(--chat-muted);
    text-align: center;
}

/* --------------------------------------------------------------------------
   التجاوب: فوق الشريط السفلي للموبايل وبجوار زر العودة للأعلى
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .sahab-chat { --chat-bottom: calc(84px + env(safe-area-inset-bottom, 0px)); --chat-side: 16px; }
    .sahab-launcher { width: 54px; height: 54px; }
    .sahab-launcher-face { width: 42px; height: 42px; }
    .sahab-launcher-face img { width: 34px; height: 34px; }
    .sahab-tip { inset-block-end: calc(var(--chat-bottom) + 66px); }
}

@media (max-width: 600px) {
    .sahab-panel {
        inset: 0;
        width: 100%;
        height: 100%;
        max-height: none;
        border: 0;
        border-radius: 0;
        z-index: 10100;
        padding-bottom: env(safe-area-inset-bottom, 0px);
        background: var(--chat-paper);
    }
    .sahab-head { padding-top: calc(12px + env(safe-area-inset-top, 0px)); }
    .sahab-compose { padding-bottom: 10px; }
    .sahab-chat.is-open .sahab-launcher,
    .sahab-chat.is-open .sahab-tip { opacity: 0; pointer-events: none; }
    html.sahab-open, html.sahab-open body { overflow: hidden; }
    .sahab-input { font-size: 16px; } /* يمنع التكبير التلقائي في iOS */
}

/* الطباعة */
@media print {
    .sahab-chat { display: none !important; }
}

/* تقليل الحركة */
@media (prefers-reduced-motion: reduce) {
    .sahab-chat *,
    .sahab-chat *::before,
    .sahab-chat *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}
html.reduced-motion .sahab-chat *,
html.reduced-motion .sahab-chat *::after {
    animation: none !important;
    transition: none !important;
}