:root {
    --glass-border: rgba(0, 0, 0, 0.08);
}
body.dark-theme {
    --glass-border: rgba(255, 255, 255, 0.08);
}

.navbar {
    display: grid;
    grid-template-columns: minmax(190px, auto) minmax(0, 1fr) auto;
    align-items: center;
    gap: 14px;
    padding: 12px 14px;
}

.brand {
    min-width: 0;
    font-size: clamp(18px, 2vw, 23px);
    letter-spacing: -0.035em;
    white-space: nowrap;
}

.brand-logo {
    height: 52px;
    flex: 0 0 auto;
}

.nav-links {
    min-width: 0;
    justify-self: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    max-width: 100%;
    padding: 5px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.54);
    overflow: visible;
}

body.dark-theme .nav-links,
.dark-theme .nav-links {
    background: rgba(17, 32, 51, 0.5);
}

.nav-links a {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    border-radius: 12px;
    font-size: 12px;
    line-height: 1;
}

.nav-actions {
    min-width: 0;
    justify-content: flex-end;
    gap: 8px;
}

.nav-actions .btn {
    padding: 12px 15px;
    border-radius: 15px;
    white-space: nowrap;
}

@media (max-width: 1120px) {
    .navbar {
        grid-template-columns: 1fr auto;
        row-gap: 12px;
    }

    .nav-links {
        grid-column: 1 / -1;
        grid-row: 2;
        justify-self: stretch;
        justify-content: flex-start;
        overflow: visible;
        scrollbar-width: none;
    }

    .nav-links::-webkit-scrollbar {
        display: none;
    }

    .nav-actions {
        grid-column: 2;
    }
}

@media (max-width: 720px) {
    .navbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px;
    }

    .brand-logo {
        height: 48px;
    }

    .nav-links {
        display: none;
    }

    .nav-actions .btn {
        display: none;
    }
}

/* Premium Theme Transitions */
body,
.navbar,
.card,
.content-card,
.module-card,
.hero,
.hero-copy,
.side-panel,
.side-card,
.setup-card,
.arena-setup-card,
.quiz-shell,
.bubub-ai-panel,
.bubub-ai-message,
footer {
    transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

/* Touch Targets Accessibility for Interactive Elements */
.theme-toggle-btn,
.sound-toggle-btn,
.social-btn,
.store-badge,
.btn,
.topic-link,
.filter-btn,
.question-jump,
#bububAiToggle,
.bubub-ai-close,
.bubub-ai-send,
.bubub-ai-chip {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Mobile Kanban Scroll Snap Layout */
@media (max-width: 768px) {
    .kanban-board {
        display: flex !important;
        overflow-x: auto !important;
        gap: 16px !important;
        padding-bottom: 8px !important;
        scroll-snap-type: x mandatory !important;
    }

    .kanban-column {
        flex: 0 0 85% !important;
        scroll-snap-align: start !important;
    }
}

/* User Profile Badge in Navbar */
.user-nav-badge {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 99px;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    font-size: 13px;
    font-weight: 800;
    transition: all 0.25s ease;
    user-select: none;
}

.user-nav-badge:hover {
    background: var(--white);
    border-color: var(--blue);
    box-shadow: 0 4px 12px rgba(79, 140, 255, 0.15);
}

.user-avatar {
    font-size: 18px;
}

.user-name {
    color: var(--dark);
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-dropdown {
    position: absolute;
    top: 110%;
    right: 0;
    width: 130px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 6px;
    box-shadow: var(--shadow-soft);
    display: none;
    z-index: 100;
    animation: fadeIn 0.2s ease;
}

.user-nav-badge:hover .user-dropdown,
.user-nav-badge.active .user-dropdown {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--dark);
    text-decoration: none;
    font-size: 12px;
    font-weight: 800;
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: var(--soft);
    color: var(--blue);
}

.dropdown-item.logout:hover {
    color: var(--danger);
    background: rgba(255, 100, 114, 0.08);
}

/* Explore Dropdown menu styles */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-trigger {
    background: transparent;
    border: none;
    color: var(--muted);
    font-weight: 700;
    font-size: 13px;
    font-family: inherit;
    padding: 8px 16px;
    border-radius: 12px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
    line-height: 1;
}

.nav-dropdown-trigger:hover {
    color: var(--blue);
    background: rgba(99, 102, 241, 0.08);
}.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--navbar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 8px;
    min-width: 190px;
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    gap: 4px;
    z-index: 200;
    opacity: 0;
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.22s ease;
}

/* Hover bridge to keep dropdown open when cursor is moving down */
.nav-dropdown-menu::before {
    content: "";
    position: absolute;
    top: -24px;
    left: 0;
    right: 0;
    height: 24px;
    background: transparent;
}
.nav-dropdown.active .nav-dropdown-menu,
.nav-dropdown:hover .nav-dropdown-menu {
    display: flex;
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.nav-dropdown-menu a {
    width: 100% !important;
    padding: 10px 14px !important;
    border-radius: 10px !important;
    color: var(--dark) !important;
    font-size: 12px !important;
    font-weight: 700 !important;
    text-align: left !important;
    box-sizing: border-box !important;
    transition: background 0.2s, color 0.2s !important;
    background: transparent !important;
    box-shadow: none !important;
}

.nav-dropdown-menu a:hover {
    background: rgba(99, 102, 241, 0.08) !important;
    color: var(--blue) !important;
}

body.dark-theme .nav-dropdown-menu a:hover {
    background: rgba(99, 102, 241, 0.15) !important;
    color: hsl(226, 100%, 75%) !important;
}

/* Mobile Hamburger & Drawer Menu styles */
.nav-hamburger {
    display: none;
    background: var(--item-bg);
    border: 1px solid var(--border);
    color: var(--dark);
    font-size: 18px;
    cursor: pointer;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    transition: all 0.2s ease;
}

.nav-hamburger:hover {
    background: var(--white);
    border-color: var(--blue);
}

.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100vh;
    background: var(--navbar-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    box-shadow: -10px 0 40px rgba(15, 23, 42, 0.15);
    z-index: 1001;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-sizing: border-box;
}

.mobile-menu-overlay.is-active .mobile-menu-drawer {
    transform: translateX(-300px);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding-bottom: 14px;
}

.mobile-menu-title {
    font-weight: 900;
    font-size: 20px;
    color: var(--dark);
    letter-spacing: -0.02em;
}

.mobile-menu-close {
    background: var(--item-bg);
    border: 1px solid var(--border);
    color: var(--muted);
    font-size: 16px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    transition: all 0.2s;
}

.mobile-menu-close:hover {
    background: var(--white);
    color: var(--dark);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-menu-links a {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 750;
    color: var(--dark);
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.mobile-menu-links a:hover,
.mobile-menu-links a.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.12);
    color: var(--blue);
    transform: translateX(4px);
}

body.dark-theme .mobile-menu-links a:hover,
body.dark-theme .mobile-menu-links a.active {
    background: rgba(99, 102, 241, 0.15);
    color: hsl(226, 100%, 75%);
}

@media (max-width: 990px) {
    .navbar {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }
    .nav-links {
        display: none !important;
    }
    .nav-hamburger {
        display: inline-flex;
    }
}