/* ============================================================
   CellView — nav.css
   Topbar sticky frosted glass
   ============================================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 0;
    transition: background var(--t-base), border-color var(--t-base), box-shadow var(--t-base);
}

.nav.scrolled {
    background: rgba(11,23,54,0.82);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
    padding: .65rem 0;
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

/* Logo */
.nav__logo {
    display: flex;
    align-items: center;
    gap: .55rem;
    text-decoration: none;
    flex-shrink: 0;
}

.nav__logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--sky), var(--bio));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.nav__logo-text {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -.02em;
}

.nav__logo-text span {
    color: var(--sky);
}

/* Links */
.nav__links {
    display: flex;
    align-items: center;
    gap: .25rem;
    list-style: none;
}

.nav__links a {
    display: block;
    padding: .4rem .85rem;
    font-size: .875rem;
    font-weight: 600;
    color: var(--gray-300);
    text-decoration: none;
    border-radius: 8px;
    transition: color var(--t-fast), background var(--t-fast);
}

.nav__links a:hover {
    color: var(--white);
    background: rgba(255,255,255,.06);
}

.nav__links a.active {
    color: var(--sky-light);
    background: rgba(59,158,204,.1);
}

/* Acciones */
.nav__actions {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-shrink: 0;
}

/* Progress badge */
.nav__progress {
    display: flex;
    align-items: center;
    gap: .4rem;
    font-size: .75rem;
    font-weight: 700;
    color: var(--gray-300);
    padding: .3rem .7rem;
    border-radius: 100px;
    background: rgba(255,255,255,.05);
    border: 1px solid var(--gray-700);
}

.nav__progress-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--bio);
    box-shadow: 0 0 6px var(--bio-glow);
}

/* Mobile toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: .3rem;
}

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gray-300);
    border-radius: 2px;
    transition: transform var(--t-base), opacity var(--t-base);
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav__toggle { display: flex; }

    .nav__links {
        display: none;
        position: absolute;
        top: calc(100% + .5rem);
        left: 1rem;
        right: 1rem;
        flex-direction: column;
        background: rgba(11,23,54,0.96);
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius);
        padding: .75rem;
        gap: .15rem;
    }

    .nav__links.open { display: flex; }

    .nav__links a {
        width: 100%;
        padding: .6rem 1rem;
    }

    .nav__actions .btn { display: none; }
}