/* Shared site header and scroll control. */
global-header { display: block; }
.header {
  background: rgba(var(--slake-bg-rgb), 0.8);
  border-bottom: 1px solid var(--slake-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.logo { display: flex; align-items: center; text-decoration: none; }
.burger-icon { width: 24px; height: 16px; display: flex; flex-direction: column; justify-content: space-between; cursor: pointer; }
.header-right .btn-ghost { 
            display: inline-flex; 
        }

        @media (max-width: 900px) {
            .header-right .btn-ghost { 
                padding: 0.5rem 0.85rem;
                font-size: 0.72rem;
                letter-spacing: 0.05em;
                margin-right: 0.25rem;
            }
            .nav { 
                display: none; 
            }
            .mobile-menu-btn { 
                display: flex; 
            }
            .header-right { 
                display: flex;
                gap: 8px; 
                align-items: center;
            }
            .header-container {
                padding: 0 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .header-right .btn-ghost {
                display: none;
            }
        }

        @media (min-width: 901px) {
            .mobile-menu-btn { 
                display: none; 
            }
        }

        .nav-link { color: var(--slake-text); font-weight: 800; transition: color 0.2s ease; }
        .nav-link:hover, .nav-link[aria-current="page"] { color: var(--slake-blue); }

        .light-mode .header {
            background: rgba(248, 250, 252, 0.94);
            border-bottom-color: rgba(15, 23, 42, 0.1);
        }
        .light-mode .logo,
        .light-mode .nav-link { color: var(--slake-text); }

        .logo span { color: var(--slake-text); transition: color 0.2s ease; }
        .light-mode .logo span { color: black; }
        
        .mobile-menu-overlay {
            background: var(--slake-bg);
            position: fixed;
            inset: 0;
            width: 100vw;
            height: 100vh;
            z-index: 9999;
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
        }
        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: all;
        }
        .mobile-menu-close {
            position: fixed;
            top: 2rem;
            right: 2rem;
            background: var(--slake-panel);
            border: 1px solid var(--slake-border);
            color: var(--slake-text);
            width: 44px;
            height: 44px;
            font-size: 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10002;
        }
        .mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            text-align: center;
            padding: 80px 2rem;
            width: 100%;
        }
        .mobile-nav-link {
            color: var(--slake-text);
            font-size: 1.75rem;
            font-family: 'Inter', sans-serif;
            text-transform: uppercase;
            font-weight: 800;
            text-decoration: none;
            letter-spacing: 0.05em;
        }
        .mobile-nav-link.cta {
            background: var(--slake-text);
            color: var(--slake-bg);
            padding: 1.25rem 2.5rem;
            font-size: 1rem;
            margin-top: 2rem;
            display: inline-block;
        }
        .burger-icon span {
            display: block;
            width: 100%;
            height: 2px;
            background: var(--slake-text);
        }
        .mobile-menu-btn {
            background: none;
            border: none;
            padding: 10px;
            display: none;
            align-items: center;
            justify-content: center;
        }

        .header-right .btn-ghost {
            font-family: 'DM Mono', monospace;
            letter-spacing: 2px;
            font-weight: 800;
            color: var(--slake-text);
            border: 1px solid var(--slake-border);
            padding: 0.75rem 1.5rem;
            text-decoration: none;
            transition: all 0.2s ease;
            border-radius: 0;
        }
        .header-right .btn-ghost:hover {
            background: var(--slake-blue);
            color: white;
        }

        .header-container,
        .header-left,
        .header-right,
        .nav,
        .logo,
        .nav-link,
        .header-right .btn-ghost {
            align-items: center;
        }

        .scroll-bottom-control {
            position: fixed;
            right: 1.25rem;
            bottom: 1.25rem;
            z-index: 950;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.75rem;
            height: 2.75rem;
            border: 1px solid var(--slake-border);
            border-radius: 50%;
            background: color-mix(in srgb, var(--slake-panel) 88%, transparent);
            color: var(--slake-text);
            box-shadow: 0 10px 28px rgba(15, 23, 42, 0.14);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            cursor: pointer;
            opacity: 1;
            transform: translateY(0);
            transition: opacity 180ms ease, transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
        }
        .scroll-bottom-control[hidden] {
            display: inline-flex;
            opacity: 0;
            pointer-events: none;
            transform: translateY(0.5rem);
        }
        .scroll-bottom-control:hover {
            background: var(--slake-blue);
            border-color: var(--slake-blue);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .scroll-bottom-control:focus-visible {
            outline: 2px solid var(--slake-blue);
            outline-offset: 3px;
        }
        .scroll-bottom-control:active {
            transform: translateY(0);
        }
        .scroll-bottom-control i {
            transition: transform 180ms ease;
        }
        .scroll-bottom-control.is-top i {
            transform: rotate(180deg);
        }
        @media (max-width: 600px) {
            .scroll-bottom-control {
                right: 0.9rem;
                bottom: 0.9rem;
                width: 2.5rem;
                height: 2.5rem;
            }
        }