/* =========================================================
   header.css — هدر سایت + منوی موبایل + Dark Mode toggle
   شهبازیون | SuFramework v3.0
   ========================================================= */

/* ─────────────────────────────────────────────────────────
   Header
   ───────────────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--c-border);
    transition: box-shadow var(--transition), background var(--transition);
}

.site-header.is-scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    background: rgba(255, 255, 255, 0.98);
}

body.dark-mode .site-header {
    background: rgba(15, 23, 42, 0.92);
}

body.dark-mode .site-header.is-scrolled {
    background: rgba(15, 23, 42, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    height: 64px;
}

/* ─────────────────────────────────────────────────────────
   Logo
   ───────────────────────────────────────────────────────── */
.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
    text-decoration: none;
    color: var(--c-text);
    font-weight: 800;
    font-size: 1.05rem;
    transition: var(--transition);
}

.site-logo:hover {
    color: var(--c-primary);
}

.site-logo img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
    background: var(--c-bg-alt);
    padding: 2px;
}

.site-logo-text {
    display: inline-block;
    letter-spacing: -0.02em;
}

/* ─────────────────────────────────────────────────────────
   Nav (دسکتاپ)
   ───────────────────────────────────────────────────────── */
.site-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex: 1;
    justify-content: center;
    min-width: 0;
}

.site-nav-link {
    position: relative;
    display: inline-block;
    padding: 0.55rem 0.85rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--c-text-soft);
    text-decoration: none;
    border-radius: var(--radius);
    transition: var(--transition);
    white-space: nowrap;
}

.site-nav-link:hover {
    color: var(--c-primary);
    background: var(--c-primary-soft);
}

.site-nav-link.is-active {
    color: var(--c-primary);
    background: var(--c-primary-soft);
}

.site-nav-link.is-active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--c-primary);
    border-radius: var(--radius-full);
}

/* ─────────────────────────────────────────────────────────
   Header Actions
   ───────────────────────────────────────────────────────── */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.header-cta {
    padding: 0.55rem 1.15rem;
    font-size: 0.85rem;
}

.header-user {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.9rem 0.4rem 0.4rem;
    border-radius: var(--radius-full);
    background: var(--c-bg-alt);
    color: var(--c-text);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.header-user:hover {
    background: var(--c-primary-soft);
    color: var(--c-primary);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    flex-shrink: 0;
}

.user-name {
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ─────────────────────────────────────────────────────────
   Language Switcher
   ───────────────────────────────────────────────────────── */
.lang-switcher {
    display: inline-flex;
    align-items: center;
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-full);
    padding: 2px;
    gap: 2px;
}

.lang-btn {
    padding: 0.25rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--c-text-soft);
    border-radius: var(--radius-full);
    transition: var(--transition);
    letter-spacing: 0.03em;
}

.lang-btn:hover {
    color: var(--c-primary);
}

.lang-btn.is-active {
    background: var(--c-primary);
    color: #fff;
}

/* ─────────────────────────────────────────────────────────
   Nav Toggle (موبایل)
   ───────────────────────────────────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    background: var(--c-bg-alt);
    transition: var(--transition);
    flex-shrink: 0;
}

.nav-toggle:hover {
    background: var(--c-primary-soft);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--c-text);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─────────────────────────────────────────────────────────
   Mobile Nav
   ───────────────────────────────────────────────────────── */
.mobile-nav {
    display: none;
    border-top: 1px solid var(--c-border);
    background: var(--c-bg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.mobile-nav.is-open {
    max-height: 600px;
}

.mobile-nav-inner {
    display: flex;
    flex-direction: column;
    padding: 1rem var(--container-pad) 1.5rem;
    gap: 0.25rem;
}

.mobile-nav-link {
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--c-text);
    text-decoration: none;
    border-radius: var(--radius);
    transition: var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.is-active {
    background: var(--c-primary-soft);
    color: var(--c-primary);
}

.mobile-nav-actions {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--c-border);
}

/* ─────────────────────────────────────────────────────────
   Floating Dark Mode Toggle
   ───────────────────────────────────────────────────────── */
.floating-dark-toggle {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 46px;
    height: 46px;
    border-radius: var(--radius-full);
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    z-index: 200;
    transition: var(--transition);
    cursor: pointer;
    color: var(--c-text);
}

.floating-dark-toggle:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: var(--c-primary);
    box-shadow: 0 8px 20px rgba(109, 40, 217, 0.2);
}

.floating-dark-toggle[aria-pressed="true"] {
    background: var(--c-primary);
    border-color: var(--c-primary);
    color: #fff;
}

/* Avatar Image Support */
.user-avatar {
    overflow: hidden;
    padding: 0;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
    display: block;
}

/* ─────────────────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .site-nav {
        gap: 0;
    }

    .site-nav-link {
        padding: 0.5rem 0.6rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 900px) {
    .site-nav {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-nav {
        display: block;
    }

    .header-inner {
        height: 60px;
        gap: 0.75rem;
    }

    .lang-switcher {
        display: none;
    }

    .header-user .user-name {
        display: none;
    }

    .header-user {
        padding: 0.35rem;
    }
}

@media (max-width: 480px) {
    .site-logo-text {
        display: none;
    }

    .header-inner {
        height: 56px;
    }

    .floating-dark-toggle {
        bottom: 16px;
        left: 16px;
        width: 42px;
        height: 42px;
        font-size: 1.05rem;
    }
}