/* ===== Navigation ===== */
.main-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.nav-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--nav-border);
    padding: 8px 30px;
    border-radius: 22px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 0; height: 0;
    background: rgba(var(--accent-pink-rgb),0.15);
    border-radius: 50%;
    transition: all 0.4s;
    transform: translate(-50%, -50%);
}

.nav-btn:hover::before { width: 200px; height: 200px; }

.nav-btn:hover {
    color: var(--text);
    border-color: var(--accent-pink);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    color: #fff;
    font-weight: bold;
    border-color: transparent;
    box-shadow: 0 0 20px rgba(244,114,182,0.35), 0 0 40px rgba(168,85,247,0.15);
}

/* ===== Tab Visibility Settings ===== */
.tab-settings-btn {
    position: fixed;
    bottom: 186px; right: 20px;
    width: 48px; height: 48px;
    border-radius: 50%;
    border: 1px solid var(--theme-toggle-border);
    background: var(--theme-toggle-bg);
    backdrop-filter: blur(var(--glass-blur));
    color: var(--text);
    cursor: pointer;
    z-index: 200;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.25s, color 0.25s, box-shadow 0.25s,
        transform 0.30s cubic-bezier(0.34,1.56,0.64,1), background 0.3s;
    box-shadow: 0 0 15px rgba(168,85,247,0.15);
}
.tab-settings-btn:hover {
    transform: scale(1.18) rotate(45deg);
    border-color: var(--accent-pink);
    color: var(--text-pink);
    background: rgba(var(--accent-pink-rgb),0.18);
    box-shadow: 0 0 18px rgba(244,114,182,0.4);
}

.tab-settings-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 220ms ease-out, visibility 220ms ease-out;
}
.tab-settings-overlay.show {
    opacity: 1;
    visibility: visible;
}

.tab-settings-panel {
    background: var(--bg-widget);
    border: 1px solid var(--border-card);
    border-radius: 20px;
    padding: 24px;
    max-width: 400px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 8px 40px rgba(0,0,0,0.4);
    transform: scale(0.95);
    transition: transform 220ms ease-out;
}
.tab-settings-overlay.show .tab-settings-panel {
    transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
    .tab-settings-overlay, .tab-settings-panel {
        transition-duration: 0.1s;
    }
}
.tab-settings-panel h3 {
    margin: 0 0 6px;
    color: var(--text-pink);
    font-size: 1.15rem;
}
.tab-settings-desc {
    margin: 0 0 16px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.tab-settings-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.tab-settings-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--nav-border);
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text);
    transition: all 0.2s;
}
.tab-settings-item:hover {
    border-color: var(--accent-pink);
    background: rgba(var(--accent-pink-rgb),0.08);
}
.tab-settings-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-pink);
    cursor: pointer;
}
.tab-settings-item.locked {
    cursor: default;
    opacity: 0.6;
}
.tab-settings-item.locked:hover {
    border-color: var(--nav-border);
    background: none;
}
.tab-settings-item.locked input[type="checkbox"] {
    cursor: default;
}
.tab-settings-lock {
    margin-left: auto;
    font-size: 0.85rem;
}
.tab-settings-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tab-settings-copy {
    flex-basis: 100%;
}
.tab-settings-reset, .tab-settings-close {
    flex: 1;
    min-width: 100px;
}
.tab-settings-copy, .tab-settings-reset, .tab-settings-close {
    padding: 9px 12px;
    border-radius: 14px;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid var(--nav-border);
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.2s;
    white-space: normal;
    text-align: center;
    line-height: 1.3;
}
.tab-settings-copy:hover, .tab-settings-reset:hover {
    border-color: var(--accent-pink);
    color: var(--text);
}
.tab-settings-close {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    color: #fff;
    border-color: transparent;
    font-weight: bold;
}