.dashboard-header {
            --hd-bg: #1a2332;
            --hd-blue: #3498db;
            --hd-teal: #1abc9c;
            --hd-text: #ecf0f1;
            --hd-muted: #95a5a6;
        }

        .dashboard-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--hd-bg);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .dashboard-header * {
            box-sizing: border-box;
        }

        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* Logo */
        .header-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--hd-text);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--hd-teal);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon svg {
            width: 22px;
            height: 22px;
            color: #fff;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        /* Navigation */
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--hd-muted);
            text-decoration: none;
            transition: 0.2s;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--hd-text);
            background: rgba(255,255,255,0.05);
        }

        .nav-link.active {
            color: var(--hd-blue);
            background: rgba(52,152,219,0.12);
        }

        /* User section */
        .header-user {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .user-greeting {
            font-size: 14px;
            color: var(--hd-muted);
        }

        .user-greeting span {
            color: var(--hd-blue);
            font-weight: 600;
        }

        .header-logout {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: #e74c3c;
            text-decoration: none;
            background: rgba(231,76,60,0.12);
            border: 1px solid rgba(231,76,60,0.35);
            transition: 0.2s;
            white-space: nowrap;
        }

        .header-logout:hover {
            background: rgba(231,76,60,0.2);
            border-color: #e74c3c;
        }

        /* Mobile */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--hd-text);
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle svg {
            width: 24px;
            height: 24px;
        }

        @media (max-width: 1024px) {
            .header-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--hd-bg);
                flex-direction: column;
                padding: 16px;
                border-top: 1px solid rgba(255,255,255,0.08);
            }

            .header-nav.open {
                display: flex;
            }

            .nav-link {
                width: 100%;
                padding: 12px 16px;
            }

            .mobile-toggle {
                display: block;
            }

            .user-greeting {
                display: none;
            }
        }