/* ===========================
   NAVIGATION
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-smooth),
        border-color var(--transition-smooth),
        box-shadow var(--transition-smooth);
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: var(--bg-secondary);
    border-bottom-color: color-mix(in srgb, var(--text-subtle) 15%, transparent);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.logo-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.logo-eos-text {
    font-family: 'Pliant', sans-serif;
    font-size: 0.5rem;
    font-weight: 700;
    line-height: 1;
    color: #FFFFFF;
    letter-spacing: 0.15em;
    transition: color var(--transition-smooth);
}

[data-theme="light"] .logo-eos-text {
    color: #000000;
}

.nav-logo img {
    height: 36px;
    width: auto;
    object-fit: contain;
    transition: height 0.3s ease;
}

@media (min-width: 1024px) {
    .nav-logo img {
        height: 54px;
    }
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links {
    display: none;
    align-items: center;
    gap: 36px;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-primary);
    transition: color var(--transition-smooth);
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-primary);
    border-radius: 50%;
    transition: color var(--transition-smooth), background var(--transition-smooth);
}

.theme-toggle:hover {
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.icon-sun,
.icon-moon {
    width: 20px;
    height: 20px;
}

.icon-sun {
    display: none;
}

[data-theme="light"] .icon-sun {
    display: block;
}

[data-theme="light"] .icon-moon {
    display: none;
}

/* Hamburger */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    z-index: 1100;
}

.hamburger span {
    display: block;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger span:nth-child(1) {
    width: 24px;
}

.hamburger span:nth-child(2) {
    width: 18px;
}

.hamburger span:nth-child(3) {
    width: 21px;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    width: 24px;
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    width: 24px;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transform: translateX(100%);
    transition: transform 0.5s cubic-bezier(0.77, 0, 0.175, 1);
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu a {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-primary);
}

.mobile-menu a:hover {
    color: var(--accent);
}