:root {
    --navy-950: #0b1f33;
    --navy-900: #102a43;
    --navy-800: #183b56;
    --navy-700: #274c6b;
    --teal-700: #0f766e;
    --teal-600: #0d9488;
    --teal-100: #ccfbf1;
    --teal-50: #f0fdfa;
    --gold-500: #d8a42b;
    --ink: #172b3a;
    --muted: #607486;
    --line: #dce5eb;
    --surface: #ffffff;
    --canvas: #f5f8fa;
    --warm: #faf7f1;
    --shadow-sm: 0 8px 24px rgba(16, 42, 67, 0.07);
    --shadow-md: 0 18px 50px rgba(16, 42, 67, 0.12);
    --radius-sm: 0.65rem;
    --radius: 1rem;
    --radius-lg: 1.5rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    color: var(--ink);
    background: var(--canvas);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.app-main,
.content,
.card,
.card-body,
.tab-content,
.tab-pane {
    min-width: 0;
    max-width: 100%;
}

a { color: var(--teal-700); }
a:hover { color: var(--navy-800); }

h1, h2, h3, h4, h5, h6 {
    color: var(--navy-950);
    font-weight: 700;
    letter-spacing: -0.025em;
}

.skip-link {
    position: fixed;
    top: -5rem;
    left: 1rem;
    z-index: 2000;
    padding: .65rem 1rem;
    color: white;
    background: var(--navy-950);
    border-radius: .5rem;
}
.skip-link:focus { top: 1rem; }

.app-navbar {
    min-height: 76px;
    background: var(--navy-900);
    box-shadow: 0 1px 0 rgba(255,255,255,.08);
}

.app-brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    color: white !important;
    line-height: 1.05;
}
.app-brand strong,
.app-brand small { display: block; }
.app-brand strong { font-size: .98rem; letter-spacing: -.01em; }
.app-brand small { margin-top: .2rem; color: #b9d4e5; font-size: .76rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }

.brand-mark {
    display: inline-grid;
    width: 2.35rem;
    height: 2.35rem;
    flex: 0 0 2.35rem;
    place-items: center;
    color: var(--navy-950);
    background: var(--teal-100);
    border-radius: .75rem;
    font-size: 1.2rem;
}

.app-navbar .nav-link {
    padding: .55rem .75rem !important;
    color: #d7e5ee !important;
    border-radius: .55rem;
    font-size: .94rem;
    font-weight: 600;
}
.app-navbar .nav-link:hover,
.app-navbar .nav-link.active { color: white !important; background: rgba(255,255,255,.09); }
.app-navbar .navbar-toggler { border-color: rgba(255,255,255,.22); }
.app-navbar .navbar-toggler-icon { filter: brightness(0) invert(1); }

.app-navbar .dropdown-menu {
    padding: .6rem;
    border: 1px solid var(--line);
    border-radius: .8rem;
    box-shadow: var(--shadow-md);
}
.app-navbar .dropdown-item {
    padding: .55rem .7rem;
    border-radius: .45rem;
    color: var(--ink);
    font-size: .9rem;
}
.app-navbar .dropdown-item:hover { color: var(--navy-950); background: var(--teal-50); }
.model-menu { width: min(340px, 90vw); max-height: 70vh; overflow-y: auto; }
.model-menu-all { color: var(--teal-700) !important; font-weight: 700; }

.app-search { width: min(240px, 100%); }
.app-search > i {
    position: absolute;
    top: 50%;
    left: .8rem;
    z-index: 2;
    color: #7991a3;
    transform: translateY(-50%);
}
.app-search input {
    width: 100%;
    height: 40px;
    padding: .5rem .8rem .5rem 2.3rem;
    color: var(--ink);
    background: white;
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 999px;
    outline: none;
}
.app-search input:focus { box-shadow: 0 0 0 3px rgba(45, 212, 191, .25); }

.app-nav-cta { padding: .48rem .8rem; color: var(--navy-950) !important; font-weight: 700; }
.avatar-circle {
    display: inline-grid;
    width: 36px;
    height: 36px;
    place-items: center;
    color: var(--navy-950);
    background: var(--teal-100);
    border: 2px solid rgba(255,255,255,.45);
    border-radius: 50%;
    font-weight: 800;
}

.app-main { flex: 1; isolation: isolate; }
.app-main,
.app-main * {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
.content { min-height: 60vh; padding-top: 2rem; padding-bottom: 3rem; }
.flash-wrap { padding-top: 1rem; }
.flash-wrap:empty { display: none; }

.card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.card-header {
    padding: 1rem 1.25rem;
    color: var(--navy-950);
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    border-radius: var(--radius) var(--radius) 0 0 !important;
}
.card-header.bg-primary,
.card-header.bg-success,
.bg-primary {
    color: white !important;
    background: var(--navy-900) !important;
}
.bg-success { background: var(--teal-700) !important; }
.bg-info { color: var(--navy-950) !important; background: var(--teal-100) !important; }
.text-primary { color: var(--teal-700) !important; }
.text-success { color: #1e6857 !important; }
.text-warning { color: #765707 !important; }
.text-info { color: #145268 !important; }
.model-detail-header .text-info,
.cta-panel .text-info { color: #99f6e4 !important; }

.btn {
    border-radius: .65rem;
    font-weight: 700;
}
.btn-primary,
.btn-purple {
    color: white;
    background: var(--teal-700);
    border-color: var(--teal-700);
}
.btn-primary:hover,
.btn-purple:hover {
    color: white;
    background: #0b625c;
    border-color: #0b625c;
}
.btn-outline-primary {
    color: var(--teal-700);
    border-color: var(--teal-700);
}
.btn-outline-primary:hover { color: white; background: var(--teal-700); border-color: var(--teal-700); }
.btn-info { color: var(--navy-950); background: var(--teal-100); border-color: #99e7dc; }
.btn-info:hover { color: var(--navy-950); background: #a8efe5; border-color: #74d9cb; }
.btn-warning { color: var(--navy-950); background: #f7df9a; border-color: #e8c75f; }

.form-control,
.form-select {
    border-color: #cbd8e0;
    border-radius: .65rem;
}
.form-control:focus,
.form-select:focus {
    border-color: var(--teal-600);
    box-shadow: 0 0 0 .22rem rgba(13,148,136,.14);
}

code {
    padding: .14rem .36rem;
    color: #0b625c;
    background: #e4f4f1;
    border: 1px solid #c5e8e2;
    border-radius: .32rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: .88em;
    font-weight: 650;
    text-shadow: none;
}

pre,
.code-block {
    max-width: 100%;
    color: #edf7fa !important;
    background: #0b1f33 !important;
    border: 1px solid #28465e !important;
    border-radius: .75rem !important;
    box-shadow: none !important;
    filter: none !important;
    backdrop-filter: none !important;
    text-shadow: none !important;
}

pre {
    width: 100%;
    padding: 1rem 1.1rem !important;
    overflow-x: auto !important;
    overflow-y: visible;
    white-space: pre;
    tab-size: 4;
}

pre code,
.code-block pre {
    display: block;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    padding: 0;
    color: #edf7fa !important;
    background: transparent !important;
    border: 0;
    font-size: .86rem;
    font-weight: 500;
    line-height: 1.65;
    opacity: 1 !important;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    text-shadow: none !important;
}

.badge { padding: .4em .65em; border-radius: 999px; font-weight: 650; }
.alert-info { color: #23485b; background: #eaf7f8; border-color: #bfe5e7; }

.page-eyebrow {
    margin-bottom: .7rem;
    color: var(--teal-700);
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.page-lead { max-width: 680px; color: var(--muted); font-size: 1.1rem; }

.model-library-card {
    display: flex;
    height: 100%;
    flex-direction: column;
    padding: 1.25rem;
    color: inherit;
    background: white;
    border: 1px solid var(--line);
    border-radius: 1rem;
    text-decoration: none;
    transition: .2s ease;
}
.model-library-card:hover {
    color: inherit;
    border-color: #8bd8cf;
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.model-card-top { display: flex; justify-content: space-between; gap: 1rem; }
.model-library-card h3 { margin-bottom: .7rem; font-size: 1.08rem; }
.model-library-card .arrow { color: var(--teal-700); }
.model-library-card p { color: var(--muted); font-size: .9rem; }
.model-meta { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: auto; }
.model-meta span { padding: .25rem .5rem; color: var(--navy-700); background: var(--canvas); border-radius: 999px; font-size: .72rem; font-weight: 700; }

.app-footer {
    padding: 4rem 0 1.5rem;
    color: #c6d8e4;
    background: var(--navy-950);
}
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: .7rem;
    color: white;
    text-decoration: none;
    font-weight: 750;
}
.footer-copy { max-width: 440px; margin-top: 1rem; color: #9fb5c5; }
.app-footer h2 { margin-bottom: 1rem; color: white; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; }
.app-footer a:not(.footer-brand) { display: block; margin: .45rem 0; color: #c6d8e4; text-decoration: none; }
.app-footer a:hover { color: white; }
.footer-note { padding: 1rem; color: #cceee9; background: rgba(13,148,136,.12); border: 1px solid rgba(94,234,212,.18); border-radius: .8rem; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2.75rem;
    padding-top: 1.25rem;
    color: #829dad;
    border-top: 1px solid rgba(255,255,255,.1);
    font-size: .85rem;
}

#scrollToTopBtn {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 1010;
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    color: white;
    background: var(--navy-800);
    border: 0;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    opacity: 0;
    pointer-events: none;
    transform: translateY(.5rem);
    transition: .2s ease;
}
#scrollToTopBtn.show { opacity: 1; pointer-events: auto; transform: none; }

@media (max-width: 991.98px) {
    .app-navbar { padding: .7rem 0; }
    .app-navbar .navbar-collapse { padding-top: .8rem; }
    .app-search { width: 100%; }
    .app-nav-cta { display: inline-block; margin-top: .4rem; }
}

@media (max-width: 767.98px) {
    .content { padding-top: 1.25rem; }
    .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}