/* ============================================================
   CHATSS — التصميم الرئيسي
   لوحة الألوان: ليل نجدي (كحلي غامق) + ذهب رملي كلون مميز
   ============================================================ */
:root {
    --bg:        #0e1116;   /* خلفية عامة */
    --bg-2:      #151a22;   /* شريط جانبي */
    --bg-3:      #1c2330;   /* بطاقات وحقول */
    --line:      #2a3242;
    --text:      #e8ebf1;
    --text-dim:  #9aa4b5;
    --accent:    #d9a441;   /* ذهب رملي */
    --accent-2:  #b9832a;
    --user-bub:  #24334d;
    --ok:        #3fae6a;
    --err:       #d9534f;
    --radius:    14px;
    --font: 'IBM Plex Sans Arabic', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.7;
}
a { color: var(--accent); text-decoration: none; }
button { font-family: var(--font); cursor: pointer; }
input, textarea, select {
    font-family: var(--font);
    background: var(--bg-3);
    border: 1px solid var(--line);
    color: var(--text);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 15px;
    width: 100%;
}
input:focus, textarea:focus, select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
    border-color: transparent;
}

/* ---------- الأزرار ---------- */
.btn {
    border: 1px solid var(--line);
    background: var(--bg-3);
    color: var(--text);
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    transition: filter .15s;
}
.btn:hover { filter: brightness(1.15); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #14100a;
    border: none;
    font-weight: 700;
}
.btn-danger { background: #3a2020; border-color: #5c2e2e; color: #f0b3b0; }
.btn-block { width: 100%; }
.icon-btn {
    background: none; border: none; color: var(--text-dim);
    font-size: 18px; padding: 6px 10px; border-radius: 8px;
}
.icon-btn:hover { background: var(--bg-3); color: var(--text); }

/* ---------- الهوية ---------- */
.brand-mark {
    width: 56px; height: 56px; border-radius: 16px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #14100a; font-weight: 700; font-size: 22px;
    display: grid; place-items: center;
    box-shadow: 0 4px 24px rgba(217,164,65,.25);
}
.brand-mark.sm { width: 34px; height: 34px; font-size: 14px; border-radius: 10px; }
.brand-mark.lg { width: 72px; height: 72px; font-size: 28px; margin-inline: auto; }

/* ---------- صفحة الدخول ---------- */
.auth-body {
    display: grid; place-items: center; min-height: 100vh;
    background:
        radial-gradient(800px 400px at 80% -10%, rgba(217,164,65,.08), transparent),
        var(--bg);
    padding: 20px;
}
.auth-card {
    width: 100%; max-width: 400px;
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 36px 30px;
}
.auth-card .brand { text-align: center; margin-bottom: 26px; }
.auth-card .brand-mark { margin-inline: auto; margin-bottom: 14px; }
.auth-card h1 { font-size: 26px; letter-spacing: 1px; }
.brand-sub { color: var(--text-dim); font-size: 13px; margin-top: 4px; }
.auth-card label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--text-dim); }
.auth-card label input { margin-top: 6px; }
.auth-switch { text-align: center; margin-top: 16px; font-size: 13px; color: var(--text-dim); }
.alert { padding: 10px 14px; border-radius: 10px; font-size: 13px; margin-bottom: 16px; }
.alert-error { background: #3a2020; color: #f0b3b0; border: 1px solid #5c2e2e; }
.alert-ok { background: #1e3327; color: #a9e3c0; border: 1px solid #2e5c40; }

/* ---------- التخطيط العام ---------- */
.layout { display: flex; height: 100vh; overflow: hidden; }

/* الشريط الجانبي */
.sidebar {
    width: 290px; flex-shrink: 0;
    background: var(--bg-2);
    border-inline-start: none;
    border-inline-end: 1px solid var(--line);
    display: flex; flex-direction: column;
    transition: margin .25s ease;
}
.sidebar.hidden { margin-inline-start: -290px; }
.sidebar-head { padding: 16px; display: flex; flex-direction: column; gap: 14px; }
.brand-row { display: flex; align-items: center; gap: 10px; }
.brand-name { font-weight: 700; letter-spacing: 1.5px; font-size: 17px; }
.sidebar-search { padding: 0 16px 10px; }
.sidebar-search input { font-size: 13px; padding: 8px 12px; }

.conv-list { flex: 1; overflow-y: auto; padding: 4px 10px; }
.conv-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 9px 12px; border-radius: 10px; cursor: pointer;
    color: var(--text-dim); font-size: 14px; margin-bottom: 2px;
    border: 1px solid transparent;
}
.conv-item:hover { background: var(--bg-3); color: var(--text); }
.conv-item.active { background: var(--bg-3); color: var(--text); border-color: var(--line); }
.conv-item .conv-title { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; flex: 1; }
.conv-actions { display: none; gap: 2px; }
.conv-item:hover .conv-actions { display: flex; }
.conv-actions button { background: none; border: none; color: var(--text-dim); font-size: 13px; padding: 2px 4px; }
.conv-actions button:hover { color: var(--accent); }
.conv-section-label { font-size: 11px; color: var(--text-dim); padding: 10px 12px 4px; letter-spacing: .5px; }

.sidebar-foot { border-top: 1px solid var(--line); padding: 14px 16px; }
.user-chip { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--bg-3); border: 1px solid var(--line);
    display: grid; place-items: center; font-weight: 700; color: var(--accent);
}
.user-meta { line-height: 1.3; overflow: hidden; }
.user-meta strong { font-size: 13px; display: block; }
.user-meta small { font-size: 11px; color: var(--text-dim); }
.foot-links { display: flex; gap: 8px; }
.foot-link {
    flex: 1; text-align: center; font-size: 12px; padding: 7px;
    background: var(--bg-3); border-radius: 8px; color: var(--text-dim);
}
.foot-link:hover { color: var(--accent); }

/* منطقة المحادثة */
.chat-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-topbar {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 16px; border-bottom: 1px solid var(--line);
    background: rgba(21,26,34,.6); backdrop-filter: blur(8px);
}
.chat-title { flex: 1; font-size: 14px; color: var(--text-dim); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }

.messages { flex: 1; overflow-y: auto; padding: 24px 0 12px; }
.msg { max-width: 780px; margin: 0 auto 18px; padding: 0 20px; display: flex; gap: 12px; }
.msg-avatar {
    width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
    display: grid; place-items: center; font-size: 13px; font-weight: 700;
}
.msg.user .msg-avatar { background: var(--user-bub); color: var(--text); }
.msg.assistant .msg-avatar { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #14100a; }
.msg-body { flex: 1; min-width: 0; }
.msg.user .msg-body {
    background: var(--user-bub); border-radius: var(--radius);
    padding: 12px 16px;
}
.msg.assistant .msg-body { padding-top: 4px; }
.msg-body p { margin-bottom: 10px; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body pre {
    direction: ltr; text-align: left;
    background: #10141b; border: 1px solid var(--line);
    border-radius: 10px; padding: 14px; overflow-x: auto;
    margin: 10px 0; font-size: 13px;
}
.msg-body code { direction: ltr; unicode-bidi: embed; font-size: 13px; }
.msg-body :not(pre) > code {
    background: var(--bg-3); padding: 2px 6px; border-radius: 5px; color: var(--accent);
}
.msg-body ul, .msg-body ol { margin: 8px 24px 10px 0; }
.msg-body table { border-collapse: collapse; margin: 10px 0; width: 100%; font-size: 13px; }
.msg-body th, .msg-body td { border: 1px solid var(--line); padding: 6px 10px; }
.msg-body th { background: var(--bg-3); }
.msg-body blockquote { border-inline-start: 3px solid var(--accent); padding-inline-start: 12px; color: var(--text-dim); margin: 10px 0; }

.typing-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .3; } }

/* شاشة الترحيب */
.welcome { text-align: center; max-width: 560px; margin: 8vh auto 0; padding: 0 20px; }
.welcome h2 { margin: 18px 0 6px; font-size: 24px; }
.welcome p { color: var(--text-dim); margin-bottom: 24px; }
.suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.suggestion {
    background: var(--bg-2); border: 1px solid var(--line); color: var(--text-dim);
    border-radius: 12px; padding: 14px; font-size: 13px; text-align: right;
    transition: all .15s;
}
.suggestion:hover { border-color: var(--accent); color: var(--text); }

/* صندوق الكتابة */
.composer-wrap { padding: 10px 20px 14px; }
.composer {
    max-width: 780px; margin: 0 auto;
    display: flex; align-items: flex-end; gap: 8px;
    background: var(--bg-3); border: 1px solid var(--line);
    border-radius: 18px; padding: 8px 8px 8px 12px;
    transition: border-color .15s;
}
.composer:focus-within { border-color: var(--accent); }
.composer textarea {
    background: none; border: none; resize: none; padding: 8px 4px;
    max-height: 220px; line-height: 1.6;
}
.composer textarea:focus { outline: none; }
.send-btn {
    width: 40px; height: 40px; border-radius: 12px; border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #14100a; display: grid; place-items: center; flex-shrink: 0;
    transition: transform .1s;
}
.send-btn:hover { transform: scale(1.05); }
.send-btn:disabled { opacity: .4; transform: none; cursor: not-allowed; }
.composer-hint { text-align: center; font-size: 11px; color: var(--text-dim); margin-top: 8px; }

/* ---------- الجوال ---------- */
@media (max-width: 768px) {
    .sidebar { position: fixed; inset-inline-start: 0; top: 0; bottom: 0; z-index: 50; box-shadow: 8px 0 30px rgba(0,0,0,.5); }
    .sidebar.hidden { margin-inline-start: -290px; box-shadow: none; }
    .suggestions { grid-template-columns: 1fr; }
}

/* حركة مخفّضة */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* شريط التمرير */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }

/* أزرار المايكروفون والإرفاق */
.icon-btn{background:none;border:none;cursor:pointer;font-size:20px;padding:6px;opacity:.75;line-height:1}
.icon-btn:hover{opacity:1}
.icon-btn.rec{color:#e11;animation:chatssPulse 1s infinite}
@keyframes chatssPulse{50%{opacity:.35}}
#attachChip{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 4px 6px;padding:6px 12px;background:rgba(125,125,255,.12);border-radius:10px;font-size:13px}
#attachChip button{background:none;border:none;cursor:pointer;font-size:13px;opacity:.7}
#attachChip button:hover{opacity:1}

/* أزرار المايكروفون والإرفاق */
.icon-btn{background:none;border:none;cursor:pointer;font-size:20px;padding:6px;opacity:.75;line-height:1}
.icon-btn:hover{opacity:1}
.icon-btn.rec{color:#e11;animation:chatssPulse 1s infinite}
@keyframes chatssPulse{50%{opacity:.35}}
#attachChip{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 4px 6px;padding:6px 12px;background:rgba(125,125,255,.12);border-radius:10px;font-size:13px}
#attachChip button{background:none;border:none;cursor:pointer;font-size:13px;opacity:.7}
#attachChip button:hover{opacity:1}