.skip-link{position:fixed;top:-5rem;left:1rem;background:var(--navy-950);color:#fff;padding:.75rem 1rem;border-radius:var(--radius-sm);z-index:100}.skip-link:focus{top:1rem}
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.app-frame{min-width:0;display:flex;flex-direction:column;flex:1}
.brand{display:flex;align-items:center;gap:.75rem}
.brand-mark{display:grid;place-items:center;flex:0 0 38px;width:38px;height:38px;border-radius:999px;background:var(--navy-900);color:#fff;font-weight:800;font-size:1rem}
.brand-copy{min-width:0}.brand strong{display:block;color:var(--navy-950);font-size:1.05rem;line-height:1.2;letter-spacing:-.01em}.brand small{display:block;margin-top:.1rem;color:var(--muted);font-size:.75rem;line-height:1.25}

.topbar{position:sticky;top:0;z-index:30;height:var(--topbar-height,64px);background:rgba(255,255,255,.98);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 var(--page-gutter,24px);gap:1rem}
.mobile-nav-toggle{display:none;align-items:center;gap:.4rem;padding:.4rem .75rem;font-size:.85rem;font-weight:600}
.mobile-nav-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:95;opacity:0;pointer-events:none;transition:opacity .2s ease}
body.mobile-nav-open .mobile-nav-backdrop{opacity:1;pointer-events:auto}

.topbar-actions{display:flex;align-items:center;gap:.75rem;min-width:0;justify-content:flex-end;flex:0 0 auto}
.language-form select{min-width:115px;height:36px;padding:.25rem .5rem;font-size:.82rem;border-radius:var(--radius-sm)}
.user-summary{text-align:right;font-size:.78rem;max-width:22rem}
.user-summary strong,.user-summary small{overflow-wrap:anywhere}
.topbar-avatar{width:34px;height:34px;font-size:.85rem}
.profile-avatar{display:inline-grid;place-items:center;flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:var(--blue-100);border:1px solid #c8d9f1;color:var(--navy-900);font-weight:800;font-size:.85rem}
.notification-link{text-decoration:none;color:var(--blue-700)}
.notification-link svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* --- HORIZONTAL NAVIGATION BAR --- */
.horizontal-nav{position:sticky;top:var(--topbar-height,64px);z-index:25;height:var(--nav-bar-height,48px);background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow-subtle)}
.horizontal-nav-container{max-width:1560px;margin:0 auto;padding:0 var(--page-gutter,24px);height:48px;display:flex;align-items:center}
.nav-horizontal-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:4px;height:48px;width:100%}
.nav-tab-item{position:relative;height:48px;display:flex;align-items:center}

.nav-tab-link{position:relative;display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 16px;border-bottom:3px solid transparent;text-decoration:none;color:#536276;font-size:.88rem;font-weight:550;white-space:nowrap;transition:background 140ms ease,color 140ms ease,border-color 140ms ease;background:transparent;border-top:0;border-left:0;border-right:0;cursor:pointer}
.nav-tab-link:hover{background:var(--surface-alt);color:var(--navy-950)}
.nav-tab-link:focus-visible{outline:2px solid var(--blue-700);outline-offset:-2px}

.nav-icon{display:inline-grid;place-items:center;flex:0 0 18px;width:18px;height:18px}
.nav-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.dropdown-caret{margin-left:2px;transition:transform 150ms ease}

/* Destination Active & Tint Treatments */
.nav-item--dashboard:hover{background:var(--nav-dashboard-tint);color:var(--navy-950)}
.nav-item--intelligence:hover{background:var(--nav-intelligence-tint);color:var(--navy-950)}
.nav-item--library:hover{background:var(--nav-library-tint);color:var(--navy-950)}
.nav-item--generator:hover{background:var(--nav-generator-tint);color:var(--navy-950)}
.nav-item--workflow:hover{background:var(--nav-workflow-tint);color:var(--navy-950)}
.nav-item--sandbox:hover{background:#f0f9ff;color:var(--navy-950)}
.nav-item--mis:hover{background:#ecfeff;color:var(--navy-950)}
.nav-item--administration:hover{background:var(--nav-administration-tint);color:var(--navy-950)}
.nav-item--source-review:hover{background:var(--nav-source-review-tint);color:var(--navy-950)}
.nav-item--models:hover{background:var(--nav-models-tint);color:var(--navy-950)}

.nav-item--dashboard.active{background:var(--nav-dashboard-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-dashboard)}.nav-item--dashboard.active .nav-icon{color:var(--nav-dashboard)}
.nav-item--intelligence.active{background:var(--nav-intelligence-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-intelligence)}.nav-item--intelligence.active .nav-icon{color:var(--nav-intelligence)}
.nav-item--library.active{background:var(--nav-library-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-library)}.nav-item--library.active .nav-icon{color:var(--nav-library)}
.nav-item--generator.active{background:var(--nav-generator-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-generator)}.nav-item--generator.active .nav-icon{color:var(--nav-generator)}
.nav-item--workflow.active{background:var(--nav-workflow-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-workflow)}.nav-item--workflow.active .nav-icon{color:var(--nav-workflow)}
.nav-item--sandbox.active{background:#f0f9ff;color:var(--navy-950);font-weight:650;border-bottom-color:#0284c7}.nav-item--sandbox.active .nav-icon{color:#0284c7}
.nav-item--mis.active{background:#ecfeff;color:var(--navy-950);font-weight:650;border-bottom-color:#0891b2}.nav-item--mis.active .nav-icon{color:#0891b2}
.nav-item--administration.active{background:var(--nav-administration-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-administration)}
.nav-item--source-review.active{background:var(--nav-source-review-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-source-review)}
.nav-item--models.active{background:var(--nav-models-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-models)}
.dropdown-toggle.active{background:var(--nav-administration-tint);color:var(--navy-950);font-weight:650;border-bottom-color:var(--nav-administration)}.dropdown-toggle.active .nav-icon{color:var(--nav-administration)}

/* Dropdown Menu */
.dropdown-parent{position:relative}
.dropdown-menu{position:absolute;top:calc(100% + 2px);left:0;min-width:220px;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);z-index:100;padding:6px;list-style:none;margin:0;opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity 140ms ease,transform 140ms ease,visibility 140ms ease}
.dropdown-parent:hover .dropdown-menu,.dropdown-parent.open .dropdown-menu,.dropdown-parent:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-parent:hover .dropdown-caret,.dropdown-parent.open .dropdown-caret{transform:rotate(180deg)}

.dropdown-item{display:flex;align-items:center;gap:10px;padding:9px 14px;border-radius:6px;color:var(--ink);text-decoration:none;font-size:.86rem;font-weight:500;transition:background 120ms ease,color 120ms ease}
.dropdown-item:hover{background:var(--surface-alt);color:var(--navy-950)}
.dropdown-item:focus-visible{outline:2px solid var(--blue-700);outline-offset:-1px}
.dropdown-item.active{background:var(--blue-100);color:var(--navy-950);font-weight:650}

/* Mobile Drawer */
.mobile-nav-drawer{position:fixed;top:0;right:0;bottom:0;width:300px;background:#fff;z-index:100;box-shadow:0 0 25px rgba(0,0,0,.2);transform:translateX(100%);transition:transform .25s ease-in-out;padding:1.25rem;display:flex;flex-direction:column;gap:1.25rem;overflow-y:auto}
body.mobile-nav-open .mobile-nav-drawer{transform:translateX(0)}
.mobile-nav-header{display:flex;align-items:center;gap:.75rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}
.mobile-nav-header strong{font-size:1.1rem;color:var(--navy-950)}
.mobile-nav-header button{margin-left:auto;font-size:1.5rem;line-height:1;padding:.2rem .5rem}
.mobile-nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.mobile-nav-link{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:6px;color:var(--ink);text-decoration:none;font-size:.92rem;font-weight:550;min-height:46px}
.mobile-nav-link.active{background:var(--blue-100);color:var(--navy-950);font-weight:650}

/* Content Area */
.page-content{width:100%;max-width:1560px;margin:0 auto;padding:1.5rem var(--page-gutter,24px) 3rem;overflow-wrap:break-word}
.content-breadcrumb{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem;color:var(--muted);font-size:.82rem}.content-breadcrumb a{color:var(--blue-700);font-weight:650;text-decoration:none}
.auth-canvas{min-height:100vh;display:grid;place-items:center;padding:2rem}.login-layout{width:min(1120px,100%);display:grid;grid-template-columns:1.15fr .85fr;gap:4rem;align-items:center}.auth-card{background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:2rem}.brand-large{margin-bottom:3rem}.login-intro h1{font-size:clamp(2.3rem,5vw,4rem);line-height:1.05;margin:.5rem 0 1.2rem;color:var(--navy-950)}
.language-marathi{line-height:1.65}.language-marathi .nav-tab-link,.language-marathi button,.language-marathi select{line-height:1.45}

/* Viewport Breakpoints */
@media(max-width:1180px){.nav-tab-link{padding:0 12px;font-size:.84rem}}
@media(max-width:1024px){.user-summary{display:none}.nav-tab-link{padding:0 10px;font-size:.82rem;gap:6px}}
@media(max-width:820px){.horizontal-nav-container{padding-inline:1rem}}
@media(max-width:767px), (max-width:700px){html,body{overflow-x:hidden}.app-shell,.app-frame,.page-content{max-width:100vw;overflow-x:hidden}.horizontal-nav{display:none}.mobile-nav-toggle{display:inline-flex}.topbar{padding:0 1rem;height:60px;max-width:100vw;overflow-x:hidden}.topbar-avatar{display:none}.page-content{padding:1rem 1rem 3rem}}
@media(max-width:560px){.brand-copy small{font-size:.7rem}}
@media(max-width:420px){.brand small{max-width:180px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar-actions{gap:.4rem}.page-content{padding-inline:.75rem}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}