/* =========================================================
   PERSONAL PORTFOLIO
   HEADER.CSS
   ---------------------------------------------------------
   استایل کامل Header سایت
   ========================================================= */


/* =========================================================
   1. HEADER
   ---------------------------------------------------------
   Header اصلی سایت به صورت Fixed در بالای صفحه قرار دارد.
   ========================================================= */

.site-header {
    position: fixed;

    top: 0;
    left: 0;

    width: 100%;
    height: var(--header-height);

    z-index: var(--z-header);

    display: flex;
    align-items: center;

    transition:
        background-color var(--transition-normal),
        border-color var(--transition-normal),
        box-shadow var(--transition-normal),
        transform var(--transition-normal);
}


/* =========================================================
   2. HEADER INNER
   ---------------------------------------------------------
   محتوای داخلی Header
   ========================================================= */

.header-inner {
    width: min(
        100% - (var(--container-padding) * 2),
        var(--container-width)
    );

    height: 100%;

    margin-inline: auto;

    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: var(--space-6);
}


/* =========================================================
   3. HEADER SCROLLED
   ---------------------------------------------------------
   وقتی کاربر Scroll می‌کند، Header کمی شیشه‌ای‌تر و
   برجسته‌تر می‌شود.
   ========================================================= */

.site-header.is-scrolled {
    background: var(--color-surface);

    border-bottom:
        1px solid var(--color-border);

    box-shadow:
        var(--shadow-md);

    backdrop-filter:
        blur(var(--blur-md));

    -webkit-backdrop-filter:
        blur(var(--blur-md));
}


/* =========================================================
   4. LOGO
   ========================================================= */

.header-logo {
    display: inline-flex;
    align-items: center;

    gap: var(--space-3);

    flex-shrink: 0;

    color: var(--color-text);

    font-size: var(--text-lg);
    font-weight: 800;
    letter-spacing: -0.02em;

    transition:
        color var(--transition-fast),
        transform var(--transition-normal);
}


.header-logo:hover {
    color: var(--color-primary);

    transform: translateY(-1px);
}


/* =========================================================
   5. LOGO MARK
   ---------------------------------------------------------
   آیکون / علامت کنار نام
   ========================================================= */

.logo-mark {
    position: relative;

    width: 38px;
    height: 38px;

    display: grid;
    place-items: center;

    border-radius: var(--radius-md);

    background:
        linear-gradient(
            135deg,
            var(--color-primary),
            var(--color-accent)
        );

    color: #ffffff;

    font-size: var(--text-sm);
    font-weight: 800;

    box-shadow:
        0 8px 20px
        rgba(37, 99, 235, 0.20);

    overflow: hidden;
}


/* نور متحرک روی Logo */

.logo-mark::after {
    content: "";

    position: absolute;

    top: -100%;
    left: -80%;

    width: 60%;
    height: 300%;

    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(255, 255, 255, 0.35),
            transparent
        );

    transform: rotate(25deg);

    transition:
        left 600ms ease;
}


.header-logo:hover .logo-mark::after {
    left: 140%;
}


/* =========================================================
   6. DESKTOP NAVIGATION
   ========================================================= */

.main-navigation {
    display: flex;
    align-items: center;

    gap: var(--space-6);

    margin-inline: auto;
}


.nav-link {
    position: relative;

    display: inline-flex;
    align-items: center;

    min-height: 40px;

    color: var(--color-text-secondary);

    font-size: var(--text-sm);
    font-weight: 600;

    transition:
        color var(--transition-fast);
}


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


/* خط زیر لینک */

.nav-link::after {
    content: "";

    position: absolute;

    left: 50%;
    bottom: 2px;

    width: 0;
    height: 2px;

    border-radius: var(--radius-full);

    background: var(--color-primary);

    transform:
        translateX(-50%);

    transition:
        width var(--transition-normal);
}


.nav-link:hover::after,
.nav-link.active::after {
    width: 18px;
}


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


/* =========================================================
   7. HEADER ACTIONS
   ---------------------------------------------------------
   زبان و Theme Toggle
   ========================================================= */

.header-actions {
    display: flex;
    align-items: center;

    gap: var(--space-2);

    flex-shrink: 0;
}


/* =========================================================
   8. HEADER ACTION BUTTON
   ========================================================= */

.header-action {
    position: relative;

    width: 40px;
    height: 40px;

    display: grid;
    place-items: center;

    border:
        1px solid var(--color-border);

    border-radius: var(--radius-md);

    background: var(--color-surface);

    color: var(--color-text-secondary);

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast);
}


.header-action:hover {
    color: var(--color-text);

    background:
        var(--color-surface-hover);

    border-color:
        var(--color-border-strong);

    transform:
        translateY(-2px);
}


.header-action:active {
    transform: translateY(0);
}


/* =========================================================
   9. THEME TOGGLE
   ========================================================= */

.theme-toggle {
    overflow: hidden;
}


.theme-icon {
    position: absolute;

    display: grid;
    place-items: center;

    font-size: 16px;

    transition:
        transform 300ms ease,
        opacity 300ms ease;
}


/* حالت پیش‌فرض */

.theme-icon--sun {
    transform: scale(1);
    opacity: 1;
}

.theme-icon--moon {
    transform: scale(0.5) rotate(-45deg);
    opacity: 0;
}


/* حالت Dark */

html[data-theme="dark"] .theme-icon--sun {
    transform: scale(0.5) rotate(45deg);
    opacity: 0;
}

html[data-theme="dark"] .theme-icon--moon {
    transform: scale(1) rotate(0);
    opacity: 1;
}


/* =========================================================
   10. LANGUAGE SELECTOR
   ========================================================= */

.language-selector {
    position: relative;
}


/* دکمه زبان */

.language-toggle {
    display: inline-flex;
    align-items: center;

    gap: var(--space-2);

    min-width: 72px;
    height: 40px;

    padding-inline:
        var(--space-3);

    border:
        1px solid var(--color-border);

    border-radius: var(--radius-md);

    background:
        var(--color-surface);

    color:
        var(--color-text-secondary);

    font-size:
        var(--text-sm);

    font-weight:
        600;

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast);
}


.language-toggle:hover {
    color: var(--color-text);

    background:
        var(--color-surface-hover);

    border-color:
        var(--color-border-strong);
}


/* فلش */
/* 
/* .language-arrow {
    background: #09b6f5;
    padding: 5px;
    font-size: 10px;

    transition:
        transform var(--transition-normal); */
*/


.language-selector.is-open .language-arrow {
    transform:
        rotate(180deg);
}


/* =========================================================
   11. LANGUAGE DROPDOWN
   ========================================================= */

.language-menu {
    position: absolute;

    top: calc(100% + 10px);
    right: 0;

    min-width: 150px;

    padding: var(--space-2);

    border:
        1px solid var(--color-border);

    border-radius:
        var(--radius-lg);

    background:
        var(--color-surface-solid);

    box-shadow:
        var(--shadow-lg);

    backdrop-filter:
        blur(var(--blur-md));

    -webkit-backdrop-filter:
        blur(var(--blur-md));

    opacity: 0;
    visibility: hidden;

    transform:
        translateY(-8px)
        scale(0.98);

    transform-origin:
        top right;

    transition:
        opacity var(--transition-fast),
        visibility var(--transition-fast),
        transform var(--transition-fast);
}


.language-selector.is-open .language-menu {
    opacity: 1;
    visibility: visible;

    transform:
        translateY(0)
        scale(1);
}


/* =========================================================
   12. LANGUAGE OPTION
   ========================================================= */

.language-option {
    display: flex;
    align-items: center;

    width: 100%;

    padding:
        var(--space-3)
        var(--space-3);

    border-radius:
        var(--radius-md);

    color:
        var(--color-text-secondary);

    font-size:
        var(--text-sm);

    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}


.language-option:hover {
    color:
        var(--color-text);

    background:
        var(--color-bg-tertiary);
}


.language-option.active {
    color:
        var(--color-primary);

    background:
        var(--color-primary-soft);

    font-weight:
        700;
}


/* =========================================================
   13. MOBILE MENU BUTTON
   ========================================================= */

.mobile-menu-toggle {
    display: none;

    position: relative;

    width: 40px;
    height: 40px;

    border:
        1px solid var(--color-border);

    border-radius:
        var(--radius-md);

    background:
        var(--color-surface);

    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast);
}


.mobile-menu-toggle:hover {
    background:
        var(--color-surface-hover);

    border-color:
        var(--color-border-strong);
}


/* خطوط Hamburger */

.menu-line {
    position: absolute;

    left: 50%;

    width: 18px;
    height: 2px;

    border-radius:
        var(--radius-full);

    background:
        var(--color-text);

    transform:
        translateX(-50%);

    transition:
        transform 300ms ease,
        opacity 200ms ease,
        top 300ms ease;
}


.menu-line:nth-child(1) {
    top: 13px;
}

.menu-line:nth-child(2) {
    top: 19px;
}

.menu-line:nth-child(3) {
    top: 25px;
}


/* حالت باز */

.mobile-menu-toggle.is-active .menu-line:nth-child(1) {
    top: 19px;

    transform:
        translateX(-50%)
        rotate(45deg);
}


.mobile-menu-toggle.is-active .menu-line:nth-child(2) {
    opacity: 0;
}


.mobile-menu-toggle.is-active .menu-line:nth-child(3) {
    top: 19px;

    transform:
        translateX(-50%)
        rotate(-45deg);
}


/* =========================================================
   14. MOBILE NAVIGATION
   ========================================================= */

.mobile-navigation {
    display: none;
}


/* =========================================================
   15. RTL SUPPORT
   ---------------------------------------------------------
   برای نسخه فارسی سایت
   ========================================================= */

html[dir="rtl"] .language-menu {
    right: auto;
    left: 0;

    transform-origin:
        top left;
}


html[dir="rtl"] .main-navigation {
    direction: rtl;
}


/* =========================================================
   16. TABLET
   ========================================================= */

@media (max-width: 900px) {

    .main-navigation {
        gap: var(--space-4);
    }

    .nav-link {
        font-size: var(--text-xs);
    }
}


/* =========================================================
   17. MOBILE
   ========================================================= */

@media (max-width: 768px) {

    .site-header {
        height: 68px;
    }

    .header-inner {
        width:
            min(
                100% - 32px,
                var(--container-width)
            );
    }


    /* مخفی کردن Navigation دسکتاپ */

    .main-navigation {
        display: none;
    }


    /* نمایش Hamburger */

    .mobile-menu-toggle {
        display: block;
    }


    /* Actions کمی کوچک‌تر */

    .header-actions {
        gap: 6px;
    }


    .header-action,
    .language-toggle {
        height: 38px;
    }


    /* Logo */

    .logo-mark {
        width: 36px;
        height: 36px;
    }


    .header-logo {
        font-size: var(--text-base);
    }


    /* Mobile Navigation */

    .mobile-navigation {
        position: fixed;

        top: 68px;
        left: 0;

        width: 100%;

        display: flex;
        flex-direction: column;

        padding:
            var(--space-4);

        background:
            var(--color-surface-solid);

        border-bottom:
            1px solid var(--color-border);

        box-shadow:
            var(--shadow-lg);

        opacity: 0;
        visibility: hidden;

        transform:
            translateY(-12px);

        transition:
            opacity var(--transition-normal),
            visibility var(--transition-normal),
            transform var(--transition-normal);

        pointer-events: none;
    }


    .mobile-navigation.is-open {
        opacity: 1;
        visibility: visible;

        transform:
            translateY(0);

        pointer-events: auto;
    }


    .mobile-nav-link {
        display: flex;
        align-items: center;

        min-height: 52px;

        padding:
            0 var(--space-4);

        border-radius:
            var(--radius-md);

        color:
            var(--color-text-secondary);

        font-size:
            var(--text-base);

        font-weight:
            600;

        transition:
            color var(--transition-fast),
            background-color var(--transition-fast);
    }


    .mobile-nav-link:hover {
        color:
            var(--color-primary);

        background:
            var(--color-primary-soft);
    }
}


/* =========================================================
   18. SMALL MOBILE
   ========================================================= */

@media (max-width: 480px) {

    .header-inner {
        width:
            calc(100% - 24px);
    }

    .header-logo span {
        display: none;
    }

    .language-toggle {
        min-width: 42px;
        width: 42px;

        justify-content: center;

        padding: 0;
    }

    .language-toggle .language-name {
        display: none;
    }
}
/* =========================================================
   LANGUAGE MENU OPEN STATE
   ---------------------------------------------------------
   وقتی کاربر روی دکمه زبان کلیک می‌کند،
   JavaScript کلاس is-open را به منوی زبان اضافه می‌کند.
   
   این بخش مشخص می‌کند که منو در حالت is-open
   واقعاً قابل مشاهده و قابل کلیک باشد.
   ========================================================= */

.language-menu.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}


/* =========================================================
   LANGUAGE OPTION
   ---------------------------------------------------------
   ظاهر هر گزینه زبان
   ========================================================= */

.language-option {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 14px;
    border: 0;
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
    border-radius: var(--radius-sm);
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}


/* حالت Hover */

.language-option:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}


/* زبان انتخاب‌شده */

.language-option.is-active {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-weight: 600;
}


/* در حالت RTL */

html[dir="rtl"] .language-option {
    text-align: right;
}