:root {
    --bg-1: #0f1724;
    --bg-2: linear-gradient(180deg, #0b1220 0%, #081221 100%);
    --panel: linear-gradient(135deg, #0f2233 0%, #072033 100%);
    --accent-1: #26e7ff;
    --accent-2: #7c4dff;
    --accent-3: #00ff9d;
    --muted: #a9b7c7;
    --glass: rgba(255,255,255,0.03);
    --shadow-md: 0 6px 22px rgba(2,6,23,0.6);
    --inset: inset 0 2px 8px rgba(255,255,255,0.02);
}

body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: radial-gradient(1200px 600px at 10% 10%, rgba(38,231,255,0.06), transparent), radial-gradient(900px 450px at 90% 90%, rgba(124,77,255,0.04), transparent), #071021;
    color: #eaf6ff;
    min-height: 100vh;
}

.expo-header {
    background: var(--bg-2);
    color: white;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1020;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.expo-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(6px);
}

    .expo-logo img {
        height: 60px;
        width: auto;
        border-radius: 10px;
        box-shadow: 0 8px 25px rgba(38,231,255,0.15), 0 4px 12px rgba(0,0,0,0.4), 0 0 0 1px rgba(38,231,255,0.1);
        filter: brightness(1.1) contrast(1.1);
        transition: all 0.3s ease;
        border: 1px solid rgba(38,231,255,0.2);
    }

    .expo-logo:hover img {
        transform: translateY(-2px) scale(1.02);
        box-shadow: 0 12px 35px rgba(38,231,255,0.25), 0 6px 18px rgba(0,0,0,0.5), 0 0 0 1px rgba(38,231,255,0.3);
    }

.expo-center {
    text-align: center;
    flex-grow: 1;
    padding: 8px 16px;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(0,0,0,0.05));
    margin: 0 20px;
    box-shadow: var(--inset);
    border: 1px solid rgba(255,255,255,0.05);
}

    .expo-center p {
        margin: 0;
        font-size: 14px;
        color: var(--muted);
        text-shadow: 0 1px 0 rgba(0,0,0,0.6);
        font-weight: 700;
    }

    .expo-center h6 {
        margin: 0;
        color: #ffffff;
        font-size: 16px;
        letter-spacing: 0.3px;
        text-shadow: 0 2px 10px rgba(124,77,255,0.12);
    }

        .expo-center h6 span {
            color: var(--accent-1);
            font-weight: bold;
            background: linear-gradient(90deg, rgba(38,231,255,0.15), rgba(124,77,255,0.15));
            padding: 6px 12px;
            border-radius: 8px;
            box-shadow: 0 6px 18px rgba(38,231,255,0.1);
            text-shadow: 0 1px 2px rgba(0,0,0,0.3);
        }

.expo-right .nav {
    gap: 12px;
    align-items: center;
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.expo-right .nav-link {
    color: var(--accent-3) !important;
    font-weight: 600;
    margin: 0 8px;
    transition: all 0.22s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 10px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    background: transparent;
}

    .expo-right .nav-link::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(38,231,255,0.1), transparent);
        transition: left 0.6s;
    }

    .expo-right .nav-link:hover::before {
        left: 100%;
    }

    .expo-right .nav-link:hover {
        color: var(--accent-1) !important;
        transform: translateY(-4px) scale(1.02);
        background: linear-gradient(180deg, rgba(38,231,255,0.12), rgba(124,77,255,0.08));
        box-shadow: 0 10px 24px rgba(38,231,255,0.1);
    }

    .expo-right .nav-link.upgrade-highlight {
        background: linear-gradient(135deg, rgba(0,255,157,0.2), rgba(38,231,255,0.15));
        color: var(--accent-3) !important;
        box-shadow: 0 6px 20px rgba(0,255,157,0.15);
        border: 1px solid rgba(0,255,157,0.3);
    }

        .expo-right .nav-link.upgrade-highlight:hover {
            background: linear-gradient(135deg, rgba(38,231,255,0.2), rgba(0,255,157,0.15));
            transform: translateY(-4px);
            box-shadow: 0 10px 28px rgba(0,255,157,0.25);
        }

.expo-right .dropdown-menu {
    background: linear-gradient(180deg, #0e1a2b, #08121a);
    border-radius: 12px;
    box-shadow: 0 12px 36px rgba(2,6,23,0.6);
    border: 1px solid rgba(255,255,255,0.03);
    padding: 8px 0;
    min-width: 240px;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.expo-right .dropdown-item {
    color: #dfeefc;
    font-weight: 500;
    padding: 10px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.16s ease-in-out;
    border-left: 3px solid transparent;
    text-decoration: none;
}

    .expo-right .dropdown-item i {
        color: var(--accent-2);
        width: 18px;
        text-align: center;
        transition: all 0.2s ease;
    }

    .expo-right .dropdown-item:hover {
        background: linear-gradient(180deg, rgba(124,77,255,0.12), rgba(38,231,255,0.06));
        color: var(--accent-1);
        transform: translateX(6px);
        border-left-color: var(--accent-1);
    }

        .expo-right .dropdown-item:hover i {
            color: var(--accent-1);
            transform: scale(1.1);
        }

.expo-right .dropdown-divider {
    margin: 6px 0;
    border-top: 1px solid rgba(255,255,255,0.03);
}

.user-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 20px;
    background: rgba(255,255,255,0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(38,231,255,0.1);
    text-decoration: none;
}

    .user-indicator:hover {
        background: rgba(255,255,255,0.08);
        border-color: rgba(38,231,255,0.2);
    }

    .user-indicator i {
        color: var(--accent-1);
        filter: drop-shadow(0 4px 8px rgba(38,231,255,0.3));
    }

/* Mobile menu toggle button */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--accent-1);
    font-size: 26px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    background: rgba(38,231,255,0.1);
    transition: all 0.3s ease;
}

    .mobile-menu-toggle:hover {
        background: rgba(38,231,255,0.2);
        transform: scale(1.1);
    }

/* mobile collapsed panel */
.mobile-nav-panel {
    display: none;
    background: linear-gradient(180deg, #0b1220, #071021);
    color: #fff;
    width: 100%;
    position: absolute;
    left: 0;
    top: 100%;
    z-index: 1090;
    box-shadow: 0 12px 36px rgba(0,0,0,0.8);
    border-top: 1px solid rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
}

    .mobile-nav-panel .mobile-list {
        list-style: none;
        padding: 8px 0;
        margin: 0;
    }

        .mobile-nav-panel .mobile-list li {
            padding: 12px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

            .mobile-nav-panel .mobile-list li a {
                color: #dfeefc;
                text-decoration: none;
                display: flex;
                align-items: center;
                gap: 12px;
                font-weight: 500;
                padding: 8px 0;
                transition: all 0.2s ease;
            }

                .mobile-nav-panel .mobile-list li a:hover {
                    color: var(--accent-1);
                    transform: translateX(8px);
                }

    .mobile-nav-panel .mobile-buttons {
        padding: 16px 20px;
        display: flex;
        flex-direction: column;
        gap: 10px;
        border-top: 1px solid rgba(255,255,255,0.05);
    }

        .mobile-nav-panel .mobile-buttons a {
            text-align: center;
            background: linear-gradient(135deg, rgba(0,255,157,0.2), rgba(38,231,255,0.15));
            color: var(--accent-3);
            padding: 12px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

            .mobile-nav-panel .mobile-buttons a:hover {
                background: linear-gradient(135deg, rgba(38,231,255,0.2), rgba(0,255,157,0.15));
                transform: translateY(-2px);
            }

/* responsive behaviour */
@media (max-width: 992px) {
    .expo-header {
        flex-direction: row;
        padding: 12px 20px;
        flex-wrap: wrap;
    }

    .expo-center {
        order: 3;
        width: 100%;
        margin: 10px 0 0 0;
        display: none !important;
    }

    .mobile-menu-toggle {
        display: block;
        order: 2;
    }

    .expo-right .nav {
        display: none !important;
    }

    .expo-logo {
        order: 1;
        flex-grow: 1;
    }

        .expo-logo img {
            height: 50px;
        }
}

@media (max-width: 768px) {
    .expo-header {
        padding: 10px 16px;
    }

    .mobile-nav-panel {
        position: fixed;
        top: 80px;
        height: calc(100vh - 80px);
        overflow-y: auto;
    }

    .expo-logo img {
        height: 45px;
    }
}

@media (max-width: 576px) {
    .expo-header {
        padding: 8px 12px;
    }

    .expo-logo img {
        height: 40px;
    }
}