/* ============================================================
       LEX · MODERN SKIN  (modern.html)
       Se carga DESPUÉS de theme.css: re-skin moderno + mobile-first.
       ============================================================ */

    :root{
        --bg:#F4F5F7; --surface:#FFFFFF; --surface2:#EDEFF3; --border:#E2E8F0;
        --text:#0F172A; --muted:#64748B; --accent:#2563EB; --accent2:#1D4ED8;
        --highlight:#E11D48; --success:#16A34A; --warning:#D97706; --danger:#DC2626;
        --shadow:0 1px 3px rgba(15,23,42,0.10); --shadow-lg:0 8px 24px rgba(15,23,42,0.12);
        --radius:8px; --radius-lg:14px;
        --sidebar-w:300px;
        --tb-h:56px; --mobile-nav-h:60px;
    }

    body{
        font-family:'Inter','Segoe UI',system-ui,sans-serif;
        background:var(--bg); color:var(--text);
    }
    .sans{font-family:'Inter','Segoe UI',system-ui,sans-serif}
    .sb-action-btn,.sb-header,.sb-section-title,.sb-hint,.right-tab,
    .center-header,.modal label,.modal-btn,.quick-btn,.stat-card,
    .audit-table,.chat-input input,.btn,.msg{font-family:'Inter','Segoe UI',system-ui,sans-serif}

    /* ============================================================
       TOP TOOLBAR (modern menu distribution)
       ============================================================ */
    .modern-toolbar{
        height:var(--tb-h);
        background:linear-gradient(120deg,#0F172A 0%,#1E293B 70%,#2563EB 140%);
        color:#fff;
        display:flex; align-items:center; gap:12px;
        padding:0 16px;
        position:fixed; top:0; left:0; right:0; z-index:900;
        box-shadow:0 1px 0 rgba(255,255,255,0.06),0 4px 16px rgba(15,23,42,0.25);
    }
    .modern-toolbar .logo{color:#fff;font-weight:700;font-size:1.05rem;letter-spacing:0.5px;white-space:nowrap}
    .modern-toolbar .logo .logo-badge{background:rgba(37,99,235,0.35);color:#BFDBFE;padding:2px 8px;border-radius:12px;font-size:0.6rem;font-weight:700;text-transform:uppercase;letter-spacing:0.5px}
    .modern-toolbar .spacer{flex:1}
    .tb-icon{
        width:38px;height:38px;border-radius:10px;border:none;cursor:pointer;
        background:rgba(255,255,255,0.10);color:#fff;font-size:1.1rem;
        display:flex;align-items:center;justify-content:center;
        transition:background .15s;
    }
    .tb-icon:hover{background:rgba(255,255,255,0.20)}
    .tb-action{
        height:34px;padding:0 12px;border-radius:8px;border:1px solid rgba(255,255,255,0.18);
        background:rgba(255,255,255,0.10);color:#fff;font-size:0.78rem;font-weight:600;
        cursor:pointer;transition:all .15s;white-space:nowrap;
        display:flex;align-items:center;gap:6px;font-family:'Inter',sans-serif;
    }
    .tb-action:hover{background:rgba(255,255,255,0.20)}
    .tb-action.primary{background:var(--accent);border-color:var(--accent)}
    .tb-action.primary:hover{background:var(--accent2)}

    .modern-toolbar .tb-right{display:flex;align-items:center;gap:10px}
    .modern-toolbar .provider-chip{
        display:flex;align-items:center;gap:7px;font-size:0.7rem;color:#CBD5E1;
        background:rgba(255,255,255,0.08);padding:6px 10px;border-radius:20px;white-space:nowrap;
    }
    .modern-toolbar .provider-chip .status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 8px var(--success)}
    .modern-toolbar .provider-chip .status-dot.offline{background:var(--danger);box-shadow:none}

    .modern-toolbar .theme-switcher{
        background:rgba(255,255,255,0.10);border:1px solid rgba(255,255,255,0.16);
        border-radius:10px;padding:3px;display:flex;gap:2px;margin-left:0;
    }
    .modern-toolbar .theme-btn{background:transparent;color:#94A3B8;border:none;padding:5px 10px;border-radius:7px;cursor:pointer;font-size:0.66rem;font-weight:700;text-transform:uppercase;letter-spacing:0.3px;font-family:'Inter',sans-serif;transition:all .15s}
    .modern-toolbar .theme-btn.active{background:var(--accent);color:#fff}
    .modern-toolbar .theme-btn:hover:not(.active){color:#fff}

    /* Hide classic header on modern page; toolbar replaces it */
    .modern-page .header{display:none}
    .modern-page .main{margin-top:var(--tb-h);height:calc(100vh - var(--tb-h))}

    /* ============================================================
       MOBILE-FIRST  (defaults = mobile)
       ============================================================ */
    .mobile-nav-bar{
        position:fixed;left:0;right:0;bottom:0;height:var(--mobile-nav-h);
        background:var(--surface);border-top:1px solid var(--border);
        display:flex;align-items:stretch;z-index:950;
        box-shadow:0 -4px 16px rgba(15,23,42,0.08);
    }
    .mobile-nav-bar button{
        flex:1;border:none;background:none;color:var(--muted);
        font-size:0.62rem;font-weight:600;cursor:pointer;
        display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
        font-family:'Inter',sans-serif;transition:color .15s;border-top:2px solid transparent;
    }
    .mobile-nav-bar button .m-icon{font-size:1.3rem;line-height:1}
    .mobile-nav-bar button.active{color:var(--accent);border-top-color:var(--accent)}

    /* Off-canvas sidebar (mobile) */
    .modern-page .sidebar{
        position:fixed;top:var(--tb-h);bottom:var(--mobile-nav-h);left:0;
        width:min(82vw,320px) !important;min-width:0 !important;
        transform:translateX(-105%);transition:transform .22s ease;
        z-index:940;box-shadow:var(--shadow-lg);border-right:1px solid var(--border);
        display:flex;flex-direction:column;background:var(--surface);
    }
    .modern-page .sidebar.open{transform:translateX(0)}
    .modern-page .sidebar-backdrop{
        position:fixed;inset:var(--tb-h) 0 var(--mobile-nav-h) 0;background:rgba(15,23,42,0.45);
        z-index:935;opacity:0;pointer-events:none;transition:opacity .2s;
    }
    .modern-page .sidebar-backdrop.show{opacity:1;pointer-events:auto}

    /* Center fills mobile; right panel becomes full-screen sheet */
    .modern-page .center{
        position:absolute;top:var(--tb-h);left:0;right:0;bottom:var(--mobile-nav-h);
        width:auto !important;min-width:0;z-index:10;
    }
    .modern-page .right{
        position:fixed;top:var(--tb-h);left:0;right:0;bottom:var(--mobile-nav-h);
        width:100% !important;min-width:0;background:var(--surface);
        transform:translateY(105%);transition:transform .22s ease;z-index:930;
        box-shadow:var(--shadow-lg);display:flex;flex-direction:column;
    }
    .modern-page .right.mobile-active{transform:translateY(0)}

    /* Hide desktop-only toolbar action buttons cleanly on mobile */
    .tb-action, .provider-chip{display:none}

    @media(max-width:900px){
        .modern-page .sidebar-resize, .modern-page .center-resize{display:none !important}
    }

    @media(min-width:901px){
        /* ========== DESKTOP: 3-panel row ========== */
        .modern-page .main{display:flex;height:calc(100vh - var(--tb-h));overflow:hidden;position:relative}
        .modern-page .sidebar{
            position:static;transform:none;width:280px;min-width:180px;max-width:600px;
            height:100%;bottom:auto;border-right:1px solid var(--border);z-index:auto;display:flex;flex-shrink:0;
        }
        .modern-page .sidebar-backdrop,.modern-page .mobile-nav-bar{display:none}
        .modern-page .center{
            position:static;flex:1 1 auto !important;width:auto !important;height:100%;min-width:0 !important;
            display:flex;flex-direction:column;overflow:hidden;background:var(--surface);
        }
        .modern-page .right{
            position:static;width:380px;min-width:120px !important;max-width:none !important;flex:0 0 380px;transform:none;
            background:var(--surface2);display:flex;flex-direction:column;height:100%;z-index:auto;border-left:1px solid var(--border);
        }
        .modern-page .sidebar-resize,.modern-page .center-resize{
            display:block !important;
            width:12px !important;
            cursor:col-resize !important;
            background:transparent;
            transition:background 0.15s;
            flex-shrink:0 !important;
            z-index:1000 !important;
            margin:0 -6px !important;
            position:relative !important;
        }
        .modern-page .sidebar-resize:hover, .modern-page .sidebar-resize.active,
        .modern-page .center-resize:hover, .modern-page .center-resize.active{
            background:var(--accent) !important;
        }
        .tb-action,.provider-chip{display:flex}
        .modern-toolbar .tb-hamburger{display:none}
    }

    /* ============================================================
       MODERN TOUCH-UPS  (design tokens already re-skin everything)
       ============================================================ */
    .modern-page .header,.modern-page .sb-header,.modern-page .sb-section-title,
    .modern-page .right-tab,.modern-page .center-header{color:var(--text);letter-spacing:0.4px}
    .doc-item{padding:8px 10px;border-radius:10px}
    .doc-item:hover{background:var(--surface2)}
    .doc-item.selected{background:rgba(37,99,235,0.08);border-color:var(--accent)}
    .doc-item.selected.active{background:var(--accent)}
    .sb-action-btn{border-radius:9px}
    .modal{border-radius:16px}
    .modal-btn-primary{background:var(--accent)}
    .btn{background:var(--accent)}
    .btn:hover{background:var(--accent2)}
    .quick-btn:hover{background:var(--accent)}
    .msg.user{background:var(--accent)}
    .side-label.active{background:var(--success)}

    .upload-zone{border:2px dashed #CBD5E1;border-radius:16px;background:var(--surface)}
    .upload-zone:hover,.upload-zone.dragover{border-color:var(--accent)}

    /* Slimmer, rounded scrollbars */
    ::-webkit-scrollbar{width:8px;height:8px}
    ::-webkit-scrollbar-thumb{background:#CBD5E1;border-radius:8px}
    ::-webkit-scrollbar-thumb:hover{background:#94A3B8}
    ::-webkit-scrollbar-track{background:transparent}

    h1,h2,h3,strong{color:var(--text)}