/* ---- Sidebar ---- */
.chat-sidebar {
    width: 340px; min-width: 300px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: relative;
    min-height: 0; overflow: hidden;
}
.sidebar-header {
    padding: 20px; display: flex; align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
}
.sidebar-header h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.02em; }
.sidebar-header-actions { display: flex; gap: 8px; }
.sidebar-list { flex: 1; overflow-y: auto; min-height: 0; }
.sidebar-list::-webkit-scrollbar { width: 4px; }
.sidebar-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.sidebar-empty {
    padding: 48px 24px; text-align: center; color: var(--text-dim); font-size: 14px;
}
.sidebar-empty-icon { font-size: 40px; opacity: 0.2; margin-bottom: 16px; display: block; }
.sidebar-tab {
    flex: 1; padding: 10px; text-align: center; font-size: 12px;
    font-weight: 600; color: var(--text-secondary); background: none;
    border: none; cursor: pointer; font-family: var(--font-display), var(--font-emoji);
    border-bottom: 2px solid transparent; transition: var(--transition);
}
.sidebar-tab:hover { color: var(--primary-400); }
.sidebar-tab.active { color: var(--primary-400); border-bottom-color: var(--primary-500); }
.ph-icon { display: inline-block; vertical-align: middle; flex-shrink: 0; }

/* Toast notification system */
.toast-container {
    position: fixed; top: 16px; right: 16px; z-index: 10000;
    display: flex; flex-direction: column; gap: 8px;
    pointer-events: none;
}
.toast {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px 20px;
    box-shadow: var(--shadow-lg); min-width: 280px; max-width: 400px;
    display: flex; align-items: flex-start; gap: 12px;
    pointer-events: auto; animation: toastSlide 0.3s ease-out;
    border-left: 3px solid var(--primary-500);
}
.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--accent); }
.toast-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--accent); }
.toast-body { flex: 1; }
.toast-title { font-size: 13px; font-weight: 700; margin-bottom: 2px; }
.toast-msg { font-size: 12px; color: var(--text-secondary); line-height: 1.5; }
.toast-close {
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; font-size: 14px; padding: 0 2px; flex-shrink: 0;
}
.toast-close:hover { color: var(--text-primary); }
@keyframes toastSlide { from { opacity:0; transform: translateX(40px); } to { opacity:1; transform: translateX(0); } }
.toast.hiding { animation: toastOut 0.2s ease-in forwards; }
@keyframes toastOut { to { opacity:0; transform: translateX(40px); } }

/* Confirm/Prompt modal */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.6);
    display: flex; align-items: center; justify-content: center;
    z-index: 10001; backdrop-filter: blur(4px);
    animation: modalFade 0.2s ease-out;
}
@keyframes modalFade { from { opacity:0; } to { opacity:1; } }
.modal-box {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 28px; min-width: 340px; max-width: 440px;
    box-shadow: var(--shadow-lg); animation: modalPop 0.25s ease-out;
    position: relative;
}
@keyframes modalPop { from { opacity:0; transform: scale(0.95) translateY(8px); } to { opacity:1; transform: scale(1) translateY(0); } }
.modal-close {
    position: absolute; top: 12px; right: 14px;
    background: none; border: none; color: var(--text-muted);
    font-size: 22px; cursor: pointer; padding: 4px 8px;
    border-radius: 6px; line-height: 1; transition: var(--transition-fast);
}
.modal-close:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.modal-icon {
    width: 44px; height: 44px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 14px;
}
.modal-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.modal-text { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 20px; }
.modal-input {
    width: 100%; padding: 10px 14px; font-size: 14px;
    background: var(--bg-input); color: var(--text-primary);
    border: 1.5px solid var(--border); border-radius: var(--radius-sm);
    font-family: var(--font-display), var(--font-emoji); margin-bottom: 16px;
    box-sizing: border-box;
}
.modal-input:focus { outline: none; border-color: var(--primary-500); box-shadow: 0 0 0 3px var(--primary-glow); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }
.modal-actions .btn { min-width: 90px; justify-content: center; }
.modal-btn-danger {
    background: var(--danger) !important; color: white !important;
    border: none !important;
}
.modal-btn-danger:hover { background: #ef4444 !important; filter: brightness(1.1); }

.chat-item {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 20px; cursor: pointer; transition: var(--transition);
    border-bottom: 1px solid var(--border-light);
    position: relative;
}
.chat-item:hover { background: var(--overlay-subtle); }
.chat-item.active {
    background: var(--primary-100);
}
.chat-item.active::before {
    content: ''; position: absolute; left: 0; top: 10px; bottom: 10px;
    width: 3px; border-radius: 0 3px 3px 0; background: var(--primary-500);
}
.chat-item-avatar {
    width: 48px; height: 48px; border-radius: 12px;
    background: var(--bg-elevated);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 600; color: var(--text-primary); flex-shrink: 0;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.chat-item-avatar svg {
    width: 100%; height: 100%;
    display: block;
    border-radius: inherit;
}
.chat-item-info { flex: 1; min-width: 0; }
.chat-item-name {
    font-size: 15px; font-weight: 600; color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chat-item-preview {
    font-size: 12px; color: var(--text-muted); margin-top: 3px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    display: flex; align-items: center; gap: 4px;
}
.chat-item-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.chat-item-time { font-size: 11px; color: var(--text-dim); }
.chat-item-delete {
    opacity: 0; background: none; border: none; color: var(--danger);
    cursor: pointer; font-size: 14px; padding: 4px; transition: var(--transition);
    border-radius: 4px;
}
.chat-item:hover .chat-item-delete { opacity: 0.6; }
.chat-item-delete:hover { opacity: 1 !important; background: rgba(248,113,113,0.1); }

/* Security tags */
.chat-tag {
    display: inline-flex; align-items: center; font-size: 9px; font-weight: 600;
    padding: 1px 5px; border-radius: 3px; letter-spacing: 0.03em; flex-shrink: 0;
}
.chat-tag-e2e { background: var(--primary-100); color: var(--primary-400); }
.chat-tag-fs { background: var(--accent-100); color: var(--accent-light); }
.chat-tag-ttl { background: rgba(248,113,113,0.12); color: var(--danger); }
.chat-tag-verified { background: var(--primary-100); color: var(--success); }

/* Badge de mensajes no leidos */
.chat-unread-badge {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 20px; height: 20px; padding: 0 6px;
    background: var(--success); color: var(--bg-body);
    border-radius: 10px; font-size: 11px; font-weight: 700;
    font-family: var(--font-display), var(--font-emoji);
    box-shadow: 0 2px 8px var(--border-focus);
    animation: badgePop 0.3s ease-out;
}
@keyframes badgePop { from { transform: scale(0); } to { transform: scale(1); } }

/* Sidebar form panels */
.sidebar-form {
    display: none; padding: 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
}
.sidebar-form.show { display: block; }
.sidebar-form-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
}
.sidebar-form-header strong { font-size: 14px; font-weight: 700; }
.sidebar-form-close {
    background: none; border: none; color: var(--text-secondary);
    cursor: pointer; font-size: 18px; padding: 4px 8px; border-radius: 4px;
}
.sidebar-form-close:hover { color: var(--text-primary); background: var(--overlay-light); }
.sidebar-form .input, .sidebar-form .select {
    padding: 10px 12px; font-size: 13px; margin-bottom: 8px;
}
.sidebar-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.sidebar-form-checks {
    display: flex; flex-direction: column; gap: 8px;
    margin: 12px 0; padding: 12px;
    background: var(--bg-body); border-radius: var(--radius-sm);
}
.sidebar-form-checks label {
    display: flex; align-items: center; gap: 8px;
    font-size: 12px; color: var(--text-secondary); cursor: pointer;
    font-weight: 500;
}


/* ============================================================
   SESSION EXPIRY BANNER
   ============================================================ */
.session-expiry-banner {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 10000;
    background: var(--bg-elevated);
    border-bottom: 2px solid var(--warning);
    padding: 8px 16px;
    animation: sessionBannerSlide 0.3s ease-out;
}
.session-expiry-banner.session-urgent {
    border-bottom-color: var(--danger);
    background: rgba(248,113,113,0.08);
}
@keyframes sessionBannerSlide {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.session-expiry-content {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; max-width: 600px; margin: 0 auto;
}
.session-expiry-icon {
    color: var(--warning); display: flex; flex-shrink: 0;
}
.session-urgent .session-expiry-icon { color: var(--danger); }
.session-expiry-text {
    font-size: 13px; color: var(--text-secondary);
}
.session-urgent .session-expiry-text { color: var(--danger); }
.session-extend-btn {
    padding: 4px 14px; border-radius: 6px;
    border: 1px solid var(--primary-400);
    background: var(--primary-400); color: #fff;
    font-size: 12px; font-weight: 600;
    cursor: pointer; transition: var(--transition);
    white-space: nowrap; flex-shrink: 0;
}
.session-extend-btn:hover {
    background: var(--primary-500);
    transform: translateY(-1px);
}

/* ============================================================
   AVATAR STYLE PICKER — Selector en Configuracion
   ============================================================ */
.avatar-style-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 4px 0 8px;
}
.av-style-card {
    display: flex; flex-direction: column;
    align-items: center; gap: 6px;
    padding: 10px 4px;
    border: 1.5px solid var(--border-light);
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
}
.av-style-card:hover {
    border-color: var(--primary-300);
    background: var(--primary-100);
}
.av-style-card:active {
    transform: scale(0.97);
}
.av-style-card.av-style-active {
    border-color: var(--primary-400);
    background: var(--primary-100);
}
.av-style-preview {
    width: 52px; height: 52px;
    border-radius: 10px;
    overflow: hidden;
}
.av-style-preview svg {
    width: 100%; height: 100%;
    display: block;
    border-radius: inherit;
}
.av-style-name {
    font-size: 11px; font-weight: 500;
    color: var(--text-secondary);
}
.av-style-active .av-style-name {
    color: var(--primary-400);
    font-weight: 600;
}
.st-hint-text {
    font-size: 12px; color: var(--text-dim);
    margin: -4px 0 6px; padding: 0 2px;
}