/* ============================================
   LAYOUT - APEIRON
   Navegación, estructura y footer
   ============================================ */

/* ----------------------------------------
   Navigation
---------------------------------------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--space-sm) 0;
    z-index: var(--z-fixed);
    background: var(--gradient-nav);
    transition: background-color var(--transition-smooth);
}

.nav.scrolled {
    background: var(--color-bg-dark);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Nav Logo */
.nav__logo {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    color: var(--color-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

.nav__logo:hover {
    color: var(--color-accent-yellow);
}

.nav__logo-icon {
    width: 40px;
    height: 40px;
    background: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg-dark);
    font-weight: bold;
    font-size: 1.2rem;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.nav__logo-icon--main {
    height: 40px;
    object-fit: contain;
    padding-left: 20px;
}

.nav__logo:hover .nav__logo-icon {
    background: var(--color-accent-yellow);
}

/* Nav Links */
.nav__links {
    display: flex;
    gap: var(--space-md);
    list-style: none;
}

.nav__link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-yellow);
    transition: width var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-accent-yellow);
}

.nav__link:hover::after {
    width: 100%;
}

/* Nav Toggle (Mobile) */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: var(--space-xs);
    z-index: calc(var(--z-fixed) + 1);
}

.nav__toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition:
        transform var(--transition-fast),
        opacity var(--transition-fast);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ----------------------------------------
   Grids
---------------------------------------- */
.features__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(300px, 1fr));
    gap: var(--space-md);
}

.characters__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.gameplay__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

/* ----------------------------------------
   Zones Timeline
---------------------------------------- */
.zones__timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.zones__timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-stripe-vertical);
    transform: translateX(-50%);
}

/* ----------------------------------------
   Footer
---------------------------------------- */
.footer {
    background: rgba(0, 0, 0, 0.5);
    padding: var(--space-lg) 0 var(--space-md);
    border-top: 1px solid var(--color-grid-line);
    position: relative;
    z-index: var(--z-base);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer__logo {
    width: 50px;
    height: 50px;
    background: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-bg-dark);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    position: relative;
}

.footer__logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: absolute;
}

.footer__logo span {
    position: relative;
    z-index: 1;
}

.footer__info {
    text-align: left;
}

.footer__name {
    display: block;
    font-family: var(--font-display);
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    letter-spacing: 0.1em;
}

.footer__date {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.footer__links {
    display: flex;
    gap: var(--space-md);
}

.footer__link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-accent-yellow);
}

.footer__bottom {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-grid-line);
    text-align: center;
}

.footer__copyright {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}