/* ==========================================================================
   QUANT TERMINAL UNIFIED INSTITUTIONAL NAVIGATION
   Shared across Landing, Research Hub, Guides, MCP Docs & Single-Stock Pages
   ========================================================================== */

:root {
    --qt-nav-bg: rgba(12, 16, 23, 0.94);
    --qt-nav-border: rgba(255, 255, 255, 0.08);
    --qt-nav-text: #eef2f6;
    --qt-nav-muted: #94a3b8;
    --qt-nav-dim: #64748b;
    --qt-nav-accent: #10b981;
    --qt-nav-accent-soft: rgba(16, 185, 129, 0.14);
    --qt-nav-cyan: #06b6d4;
    --qt-nav-red: #f87171;
    --qt-nav-amber: #f59e0b;
    --qt-nav-purple: #a855f7;
    --qt-nav-menu-bg: #111722;
    --qt-nav-menu-border: #2b3648;
    --qt-nav-hover: rgba(255, 255, 255, 0.06);

    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 4px;
}

.nav-bar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--qt-nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--qt-nav-border);
    padding: 12px 0;
    width: 100%;
}

.nav-container,
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    box-sizing: border-box;
}

.nav-brand,
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--qt-nav-text);
    flex-shrink: 0;
}

.nav-brand img,
.brand img {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    object-fit: cover;
}

.nav-brand-title,
.brand span {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--qt-nav-text);
}

.nav-brand-tag {
    font-size: 10px;
    font-family: 'Consolas', 'SFMono-Regular', monospace;
    color: var(--qt-nav-accent);
    background: var(--qt-nav-accent-soft);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--qt-nav-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.15s ease;
}

.nav-links a:hover {
    color: var(--qt-nav-text);
}

/* Institutional Dropdowns */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-trigger {
    background: none;
    border: none;
    color: var(--qt-nav-muted);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    transition: color 0.15s ease;
}

.nav-dropdown-trigger:hover,
.nav-dropdown:hover .nav-dropdown-trigger,
.nav-dropdown.active .nav-dropdown-trigger {
    color: var(--qt-nav-text);
}

.nav-chevron {
    font-size: 10px;
    color: var(--qt-nav-dim);
    transition: transform 0.2s ease, color 0.2s ease;
}

.nav-dropdown:hover .nav-chevron,
.nav-dropdown.active .nav-chevron {
    transform: rotate(180deg);
    color: var(--qt-nav-accent);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    background: var(--qt-nav-menu-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--qt-nav-menu-border);
    border-radius: var(--radius);
    padding: 8px;
    min-width: 320px;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(255, 255, 255, 0.07);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* INVISIBLE HOVER BRIDGE: Prevents hover loss when cursor moves down from trigger to menu */
.nav-dropdown-menu::before {
    content: '';
    position: absolute;
    top: -16px;
    left: 0;
    right: 0;
    height: 16px;
    background: transparent;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.active .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--qt-nav-text) !important;
    transition: background 0.15s ease;
}

.dropdown-item:hover {
    background: var(--qt-nav-hover);
}

.dropdown-icon {
    font-size: 14px;
    margin-top: 2px;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.dropdown-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.dropdown-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--qt-nav-text);
    line-height: 1.3;
}

.dropdown-desc {
    font-size: 11px;
    color: var(--qt-nav-dim);
    line-height: 1.3;
}

.nav-link-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--qt-nav-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.15s ease;
}

.nav-link-badge:hover {
    color: var(--qt-nav-text);
}

.mcp-pill {
    font-family: 'Consolas', 'SFMono-Regular', monospace;
    font-size: 9px;
    font-weight: 700;
    background: rgba(6, 182, 212, 0.15);
    color: var(--qt-nav-cyan);
    border: 1px solid rgba(6, 182, 212, 0.35);
    padding: 1px 5px;
    border-radius: 4px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-btn,
.nav-actions .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    line-height: 1.2;
    white-space: nowrap;
}

.nav-btn-outline,
.nav-actions .btn-outline {
    background: #182232;
    border: 1px solid #243042;
    color: #eef2f6;
}

.nav-btn-outline:hover,
.nav-actions .btn-outline:hover {
    background: #1f2b3e;
    border-color: #64748b;
    color: #ffffff;
}

.nav-btn-primary,
.nav-actions .btn-primary {
    background: linear-gradient(135deg, #10b981, #06b6d4);
    color: #080d14 !important;
    border: none;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
    font-weight: 800;
}

.nav-btn-primary:hover,
.nav-actions .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
}

@media (max-width: 600px) {
    .nav-container,
    .nav-inner {
        padding: 0 12px;
        gap: 8px;
    }
    .nav-actions {
        gap: 6px;
    }
    .nav-btn,
    .nav-actions .btn {
        padding: 6px 10px;
        font-size: 11px;
        gap: 4px;
    }
}

@media (max-width: 420px) {
    .nav-brand-tag {
        display: none;
    }
    .nav-brand img,
    .brand img {
        width: 28px;
        height: 28px;
    }
    .nav-brand-title,
    .brand span {
        font-size: 14px;
    }
    .nav-btn,
    .nav-actions .btn {
        padding: 5px 8px;
        font-size: 10px;
    }
}