/* =============================================================================
   Navigation Component
   ============================================================================= */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-bg-nav);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-nav);
    transition: 
        background var(--transition-theme),
        border-color var(--transition-theme);
}

.nav__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-8);
}

/* Logo */
.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
}

.nav__logo svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

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

/* Actions */
.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-normal);
    opacity: 0.8;
    transition: 
        opacity var(--transition-fast),
        color var(--transition-fast);
}

.nav__link svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.nav__link:hover {
    opacity: 1;
    color: var(--color-accent);
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 
        background var(--transition-normal),
        border-color var(--transition-normal),
        transform var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-hover);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    position: absolute;
    width: 20px;
    height: 20px;
    stroke: var(--color-text-primary);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    transition: 
        opacity var(--transition-normal),
        transform var(--transition-normal);
}

.theme-toggle__moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle__sun {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="light"] .theme-toggle__moon {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

[data-theme="light"] .theme-toggle__sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}