/* ==================== Header (responsive + hamburger) ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: 72px;
}

/* ==================== Logo ==================== */
.header-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.header-logo img {
    height: 46px;
    width: auto;
}

/* ==================== Desktop nav ==================== */
.header-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 0.25rem;
}

.nav-link {
    position: relative;
    padding: 0.5rem 0.9rem;
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    inset-inline: 0.9rem;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--color-champagne-gold);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.nav-link:hover {
    color: var(--color-royal-blue);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link.active {
    color: var(--color-royal-blue);
}

/* ==================== Actions ==================== */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    background: var(--color-primary-navy);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 700;
    white-space: nowrap;
    transition: background-color 0.2s ease;
}

.btn-login:hover {
    background: var(--color-royal-blue);
    color: var(--color-white);
}

.header-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-white);
    color: var(--color-primary-navy);
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.header-icon-btn:hover {
    border-color: var(--color-royal-blue);
    background: var(--color-sky-blue);
    color: var(--color-royal-blue);
}

/* ==================== Hamburger ==================== */
.header-toggle {
    display: none;                 /* فقط در موبایل/تبلت دیده می‌شود */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-white);
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.header-toggle:hover {
    border-color: var(--color-royal-blue);
}

.header-toggle-bar {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-primary-navy);
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.site-header.is-open .header-toggle {
    background: var(--color-sky-blue);
    border-color: var(--color-royal-blue);
}

.site-header.is-open .header-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.is-open .header-toggle-bar:nth-child(2) { opacity: 0; }
.site-header.is-open .header-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-toggle:focus-visible,
.header-icon-btn:focus-visible,
.nav-link:focus-visible,
.btn-login:focus-visible {
    outline: 2px solid var(--color-electric-blue);
    outline-offset: 2px;
}

/* ==================== Mobile / Tablet ==================== */
@media (max-width: 900px) {
    .header-inner {
        min-height: 64px;
        gap: 1rem;
    }

    .header-logo img {
        height: 40px;
    }

    .header-logo {
        margin-inline-end: auto;   /* لوگو یک سمت، اکشن‌ها سمت دیگر */
    }

    .header-toggle {
        display: inline-flex;
    }

    /* منو تبدیل به پنل بازشونده زیر هدر می‌شود */
    .header-nav {
        position: absolute;
        top: 100%;
        inset-inline: 0;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        padding: 0.75rem 1rem 1rem;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);

        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        pointer-events: none;
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s linear 0.2s;
    }

    .site-header.is-open .header-nav {
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s;
    }

    .nav-link {
        padding: 0.85rem 1rem;
        font-size: 1rem;
        border-radius: 12px;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover {
        background: var(--color-off-white);
    }

    .nav-link.active {
        background: var(--color-sky-blue);
        box-shadow: inset 3px 0 0 var(--color-champagne-gold);   /* نوار طلایی سمت راست در RTL */
    }
}

@media (max-width: 420px) {
    .header-search {
        display: none;
    }

    .btn-login {
        padding: 0.45rem 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .header-nav,
    .header-toggle-bar,
    .nav-link::after {
        transition: none;
    }
}