:root {
    --bg: #121212;
    --bg-elevated: #1e1e1e;
    --bg-panel: #1e1e1e;
    --fg: #ffffff;
    --fg-muted: #b0b0b0;
    --fg-dim: #707070;
    --accent: #d9851a;
    --accent-soft: rgba(217, 133, 26, 0.12);
    --accent-glow: rgba(217, 133, 26, 0.25);
    --border: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(217, 133, 26, 0.3);
    --card-hover: rgba(255, 255, 255, 0.05);
    --shadow-panel: 0 20px 60px -10px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ── Navbar ── */
.navbar-custom {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(18px) saturate(1.3);
    -webkit-backdrop-filter: blur(18px) saturate(1.3);
    border-bottom: 1px solid var(--border);
}

.navbar {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ── Brand ── */
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--fg);
    margin-right: 28px;
    flex-shrink: 0;
}

.brand-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--accent), #9a5c0e);
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-size: 14px;
    color: #fff;
    box-shadow: 0 2px 10px var(--accent-glow);
}

.brand-text {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.3px;
}

.nav-item {
    position: relative;
}

.nav-item::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 10px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 7px;
    background: none;
    border: 1px solid transparent;
    color: var(--fg-muted);
    font-family: 'DM Sans', sans-serif;
    font-size: 14.5px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--fg);
    background: var(--card-hover);
    border-color: var(--border);
}

.nav-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Active state — purely CSS driven */
.nav-item:hover .nav-link,
.nav-item:focus-within .nav-link {
    color: var(--accent);
    background: var(--accent-soft);
    border-color: var(--border-accent);
}

.arrow-down {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4.5px solid currentColor;
    transition: transform var(--transition-smooth);
    margin-bottom: 1px;
}

.nav-item:hover .arrow-down,
.nav-item:focus-within .arrow-down {
    transform: rotate(180deg);
}

/* ── Simple nav links ── */
.nav-link-simple {
    display: flex;
    align-items: center;
    background: none;
    border: none;
    color: var(--fg-muted);
    font-family: 'DM Sans', sans-serif;
    font-size: 14.5px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link-simple:hover {
    color: var(--fg);
    background: var(--card-hover);
}

.nav-link-simple:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.navbar-spacer {
    flex: 1;
}

.mega-panel {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), visibility var(--transition-smooth);
}

.nav-item:hover .mega-panel,
.nav-item:focus-within .mega-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.mega-container {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
    padding: 6px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    min-width: 1000px;
    position: relative;
    overflow: hidden;
}

.mega-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
}

.mega-col {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mega-col:hover {
    background: var(--card-hover);
}

.mega-col.border-left {
    border-left: 1px solid var(--border);
}

.col-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--fg-dim);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition-fast);
}

.mega-col:hover .col-title {
    color: var(--fg-muted);
}

.col-title i {
    font-size: 12px;
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--fg-dim);
    transition: all var(--transition-fast);
}

.mega-col:nth-child(1):hover .col-title i {
    background: rgba(22,163,74,0.1);
    color: #16a34a;
}

.mega-col:nth-child(2):hover .col-title i {
    background: rgba(37,99,235,0.1);
    color: #2563eb;
}

.mega-col:nth-child(3):hover .col-title i {
    background: rgba(194,65,12,0.1);
    color: #c2410c;
}

/* ── Tool list ── */
.tool-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.tool-list li a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    color: var(--fg-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tool-list li a::after {
    content: '\f054';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 9px;
    opacity: 0;
    transform: translateX(-4px);
    transition: all var(--transition-fast);
    color: var(--accent);
}

.tool-list li a:hover {
    color: var(--fg);
    background: rgba(0,0,0,0.04);
}

.tool-list li a:hover::after {
    opacity: 1;
    transform: translateX(0);
}

.tool-list li a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    border-radius: var(--radius-sm);
}

/* ── Badge ── */
.badge-hot {
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(184,112,20,0.1);
    color: var(--accent);
    margin-left: 8px;
    line-height: 1;
}

/* ── Panel footer ── */
.mega-footer {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px 6px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
}

.mega-footer-text {
    font-size: 12px;
    color: var(--fg-dim);
}

.kbd {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    border-radius: 5px;
    background: rgba(0,0,0,0.04);
    border: 1px solid var(--border);
    font-family: 'DM Sans', sans-serif;
    font-size: 11px;
    color: var(--fg-dim);
}

.mega-footer-shortcuts {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    color: var(--fg-dim);
}
/* ── Responsive ── */
@media (max-width: 1024px) {
    .mega-container {
        grid-template-columns: repeat(2, 1fr);
        min-width: 100%;
        max-width: calc(100vw - 32px);
    }

    .mega-col.border-left {
        border-left: none;
        border-top: 1px solid var(--border);
    }

    .nav-link-simple {
        display: none;
    }

    .brand-text {
        display: none;
    }

    .mega-footer-shortcuts {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

.mega-panel.is-hidden {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    transform: translateX(-50%) translateY(6px) !important;
}