/**
 * Navigation Bar Styles
 */

/* Main navigation bar */
.main-nav {
    background: var(--color-primary-gradient-start);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    margin-bottom: 0;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: var(--spacing-lg);
    padding: 0.5rem var(--inline-padding);
}

.nav-brand {
    display: flex;
    align-items: center;
    color: var(--color-text-white);
    text-decoration: none;
    padding: 0.375rem 0;
    transition: opacity var(--transition-base);
}

/* Chevron indicator - hidden on desktop, shown on mobile */
.brand-chevron {
    display: none;
    width: 16px;
    height: 16px;
    margin-left: 4px;
    transition: transform var(--transition-fast);
}

/* Rotate chevron when menu is open */
.nav-brand[aria-expanded="true"] .brand-chevron {
    transform: rotate(180deg);
}

.brand-logo {
    width: 42px;
    height: 18px;
    margin-right: 2px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.brand-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.5px;
    color: var(--color-text-primary);
}

.brand-accent {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
    margin: 0;
    padding: 0;
    flex-grow: 1;
}

.nav-links li {
    display: inline-block;
}

/* Push auth links to the right on desktop */
.nav-links li.nav-auth {
    margin-left: auto;
}

/* Nav icons */
.nav-link .icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* Nav counter (unread count, entity count) */
.nav-count {
    font-size: 0.9em;
    font-weight: 300;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: 0.9em;
    font-weight: var(--font-weight-normal);
    position: relative;
    white-space: nowrap;
}

.nav-link.active {
    color: var(--color-primary);
    background: transparent;
    font-weight: var(--font-weight-semibold);
}


/* Nav group - for grouped links like Following + Add */
li.nav-group {
    display: flex;
    align-items: center;
    gap: 0;
}

/* Nav add button (+ icon) - extends .nav-link */
.nav-add {
    display: flex;
    align-items: center;
    padding-left: 0.35rem;
    padding-right: 0.35rem;
    margin-left: -0.25rem;
    color: var(--color-text-muted);
}

.nav-add.active {
    color: var(--color-primary);
}

.nav-add .icon {
    width: 12px;
    height: 12px;
}

/* === Mobile Navigation Toggle === */
.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: 8px;
    margin-left: auto;
    cursor: pointer;
    color: var(--color-text-muted);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-toggle-icon {
    width: 24px;
    height: 24px;
    fill: none;
}

/* === Very Small Screens (< 360px) === */
@media (max-width: 359px) {
    /* Hide counts on very narrow screens to prevent overflow */
    .nav-count {
        display: none;
    }
}

/* === Mobile Responsive (< 620px) === */
@media (max-width: 619px) {
    .nav-container {
        flex-wrap: wrap;
        padding: 0.5rem var(--content-padding);
        justify-content: center;
    }

    /* Brand becomes the menu toggle on mobile */
    .nav-brand {
        cursor: pointer;
    }

    .brand-chevron {
        display: inline-block;
    }

    /* Hide hamburger toggle on mobile - brand is the toggle now */
    .nav-toggle {
        display: none;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        padding-top: var(--spacing-sm);
        border-top: 1px solid var(--color-border);
        margin-top: var(--spacing-sm);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li {
        display: block;
        padding: 0;
    }

    .nav-links li.nav-group {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-link {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 12px 8px;
        min-height: var(--touch-target-min);
        font-size: 1rem;
        border-radius: var(--radius-md);
        white-space: nowrap;
    }

    /* Hide + icon on mobile */
    .nav-add {
        display: none;
    }

    .brand-title {
        font-size: 1.1rem;
    }
}

/* === Tablet Responsive (620px - 849px) === */
@media (min-width: 620px) and (max-width: 849px) {
    .nav-container {
        padding: 0.5rem var(--content-padding);
    }

    .nav-link {
        padding: 0.5rem 0.75rem;
    }
}

/* Smooth scrolling for the whole page */
@media (prefers-reduced-motion: no-preference) {
    .main-nav {
        transition: background var(--transition-base);
    }
}

/* === Hover States (pointer devices only) === */
@media (hover: hover) {
    .nav-brand:hover {
        opacity: 0.85;
        text-decoration: none;
    }

    .nav-link:hover {
        color: var(--color-text-primary);
        background: var(--color-bg-light);
        text-decoration: none;
    }

    .nav-add:hover {
        color: var(--color-text-primary);
    }

    .nav-toggle:hover {
        color: var(--color-text-primary);
        background: var(--color-bg-light);
    }

    .nav-link-primary:hover {
        background: var(--color-primary-dark, #0056b3);
    }
}

/* Primary CTA link (e.g., "Create account" for logged-out users) */
.nav-link-primary {
    background: var(--color-primary);
    color: var(--color-text-white, #fff) !important;
    font-weight: var(--font-weight-semibold);
}

.nav-link-primary .icon {
    color: inherit;
}

/* === Theme Toggle === */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
}

/* Light mode: show moon (switch to dark), hide sun */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline-block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: inline-block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }