/* =========================================
   متغیرهای رنگی و ریست پایه
   ========================================= */
:root {
    --bg-main: #202124;
    --bg-secondary: #303134;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --link-color: #8ab4f8;
    --border-color: #3c4043;
    --search-border: #5f6368;
    --url-color: #bdc1c6;
    --hover-bg: #3c4043;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

@font-face {
    font-family: 'Vazir';
    src: url('../fonts/Vazir.woff2') format('woff2');
    font-weight: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Vazir';
    src: url('../fonts/Vazir-Bold.woff2') format('woff2');
    font-weight: bold;
    font-display: swap;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Vazir', system-ui, sans-serif;
    direction: rtl;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* =========================================
   هدر
   ========================================= */
header {
    display: flex;
    align-items: center;
    padding: 14px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--bg-main);
    z-index: 100;
}

.logo {
    font-family: 'Vazir', sans-serif;
    font-size: 26px;
    font-weight: bold;
    color: #fff;
    text-decoration: none !important;
    flex-shrink: 0;
    letter-spacing: -0.5px;
}

.logo span.r { color: #4285f4; }
.logo span.z { color: #ea4335; }
.logo span.s { color: #fbbc05; }
.logo span.t { color: #34a853; }

/* =========================================
   کادر جستجو
   ========================================= */
.search-wrapper {
    flex-grow: 1;
    max-width: 690px;
}

.search-container {
    display: flex;
    align-items: center;
    background-color: var(--bg-secondary);
    border: 1px solid var(--search-border);
    border-radius: 24px;
    padding: 0 8px 0 16px;
    width: 100%;
    height: 46px;
    transition: all 0.2s ease-in-out;
}

.search-container:hover,
.search-container:focus-within {
    border-color: transparent;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.6);
    background-color: #3c3f42;
}

.search-container input {
    flex-grow: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'Vazir', sans-serif;
    font-size: 16px;
    height: 100%;
    outline: none;
    padding: 0 8px;
}

.search-container input::placeholder {
    color: var(--text-secondary);
}

.search-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 50%;
    transition: background 0.2s;
}

.search-btn:hover {
    background-color: var(--hover-bg);
}

.search-btn svg {
    fill: var(--text-secondary);
    width: 22px;
    height: 22px;
    transition: fill 0.2s;
}

.search-container:focus-within .search-btn svg {
    fill: var(--link-color);
}

/* =========================================
   تب‌ها
   ========================================= */
.tabs {
    display: flex;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
    gap: 4px;
}

.tab-btn {
    color: var(--text-secondary);
    padding: 14px 16px;
    cursor: pointer;
    font-size: 14px;
    background: transparent;
    border: none;
    font-family: 'Vazir', sans-serif;
    border-bottom: 3px solid transparent;
    transition: color 0.2s;
    position: relative;
    bottom: -1px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background-color: var(--hover-bg);
    border-radius: 4px 4px 0 0;
}

.tab-btn.active {
    color: var(--link-color);
    border-bottom: 3px solid var(--link-color);
}

/* =========================================
   محتوای اصلی
   ========================================= */
main {
    display: flex;
    padding: 24px 24px 24px 180px;
    flex-grow: 1;
    gap: 60px;
}

.results-area {
    flex-grow: 1;
    max-width: 660px;
}

/* =========================================
   آیتم نتایج وب
   ========================================= */
.result-item {
    margin-bottom: 32px;
    padding: 12px;
    border-radius: 8px;
    transition: background 0.15s;
}

.result-item:hover {
    background-color: var(--bg-secondary);
}

.result-url {
    color: var(--url-color);
    font-size: 12px;
    margin-bottom: 4px;
    display: block;
    direction: ltr;
    text-align: right;
}

.result-title {
    color: var(--link-color);
    font-size: 20px;
    margin: 4px 0 6px 0;
    line-height: 1.4;
    display: block;
    font-weight: bold;
}

.result-title:hover {
    text-decoration: underline;
}

.result-desc {
    color: var(--url-color);
    font-size: 14px;
    line-height: 1.7;
    word-wrap: break-word;
}

/* =========================================
   گالری تصاویر
   ========================================= */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    width: 100%;
}

.img-result {
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--bg-secondary);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.img-result:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.img-result img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
}

/* =========================================
   سایدبار
   ========================================= */
.sidebar {
    width: 300px;
    flex-shrink: 0;
}

/* =========================================
   فوتر
   ========================================= */
footer {
    text-align: center;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: auto;
}

footer a {
    color: var(--text-secondary);
    margin: 0 8px;
}

footer a:hover {
    color: var(--text-primary);
}

/* =========================================
   حالت صفحه اصلی (home-mode)
   ========================================= */
body.home-mode {
    justify-content: center;
    align-items: center;
}

body.home-mode header {
    flex-direction: column;
    padding: 0;
    width: 100%;
    max-width: 600px;
    border-bottom: none;
    background: transparent;
    position: static;
    gap: 24px;
}

body.home-mode .logo {
    font-size: 72px;
    text-align: center;
    letter-spacing: -2px;
    width: auto;
}

body.home-mode .search-wrapper {
    max-width: 100%;
    width: 100%;
}

body.home-mode .search-container {
    height: 52px;
    border-radius: 28px;
}

body.home-mode .tabs {
    display: none;
}

body.home-mode main {
    display: none;
}

body.home-mode footer {
    display: none;
}

/* =========================================
   پیام خالی
   ========================================= */
.empty-state {
    text-align: center;
    margin-top: 60px;
    color: var(--text-secondary);
}

.empty-state svg {
    fill: var(--border-color);
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

/* =========================================
   واکنش‌گرایی
   ========================================= */
@media screen and (max-width: 960px) {
    main {
        padding: 20px 16px;
    }

    .sidebar {
        width: 260px;
    }
}

@media screen and (max-width: 768px) {
    header {
        padding: 10px 14px;
        gap: 12px;
    }

    .logo {
        font-size: 22px;
    }

    .search-container {
        height: 42px;
    }

    .tabs {
        padding: 0 12px;
        overflow-x: auto;
        white-space: nowrap;
        scrollbar-width: none;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    main {
        flex-direction: column;
        padding: 16px;
        gap: 24px;
    }

    .results-area {
        max-width: 100%;
    }

    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 10px;
    }

    .sidebar {
        width: 100%;
    }

    body.home-mode header {
        padding: 0 16px;
    }

    body.home-mode .logo {
        font-size: 52px;
    }
}

@media screen and (max-width: 480px) {
    .result-title {
        font-size: 17px;
    }

    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* =========================================
   لوگو تصویری
   ========================================= */
.logo-img {
    height: 42px;
    width: auto;
    display: block;
    object-fit: contain;
    transition: opacity 0.2s;
}

.logo:hover .logo-img {
    opacity: 0.85;
}

/* در حالت home لوگو بزرگتر */
body.home-mode .logo-img {
    height: 90px;
}

/* =========================================
   فوتر بهبود یافته
   ========================================= */
footer {
    text-align: center;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copy {
    color: var(--text-secondary);
    font-size: 12px;
}

.footer-copy a {
    color: var(--link-color);
    font-weight: bold;
}

.footer-ads {
    font-size: 12px;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.footer-ads a {
    color: #fbbc04;
    font-weight: bold;
    direction: ltr;
    display: inline-block;
}

/* فوتر در home-mode نمایش داشته باشد */
body.home-mode footer {
    display: flex;  /* قبلاً none بود، تغییر دادیم */
}

/* استایل فوتر */
footer {
    background: #f8f9fa;
    border-top: 1px solid #dadce0;
    padding: 30px 20px;
    margin-top: 50px;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    margin-bottom: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 5px;
}

.footer-links a {
    color: #5f6368;
    text-decoration: none;
    font-size: 14px;
    padding: 5px 10px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #1a0dab;
    text-decoration: underline;
}

.footer-links .separator {
    color: #dadce0;
    font-size: 14px;
    user-select: none;
}

.footer-credit {
    margin-bottom: 10px;
    font-size: 13px;
    color: #70757a;
}

.footer-credit a {
    color: #1a0dab;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-credit a:hover {
    color: #174ea6;
    text-decoration: underline;
}

.footer-copyright {
    font-size: 12px;
    color: #9aa0a6;
}

/* ریسپانسیو برای موبایل */
@media (max-width: 768px) {
    footer {
        padding: 25px 15px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-links .separator {
        display: none;
    }
    
    .footer-links a {
        display: block;
        padding: 8px 15px;
        border-bottom: 1px solid #f0f0f0;
        width: 100%;
    }
    
    .footer-links a:last-child {
        border-bottom: none;
    }
    
    .footer-credit {
        margin-top: 15px;
        padding-top: 15px;
        border-top: 1px solid #e8eaed;
    }
}

<!-- هدر و فوتر را می‌توانید کپی کنید یا در فایل جدا include کنید -->
<div style="padding: 50px; color: #fff; direction: rtl; font-family: 'Vazir';">
    <h1>درباره RZST</h1>
    <p>این یک موتور جستجوی بومی است که برای شرایط اینترانت طراحی شده است.</p>
    <a href="index.php">بازگشت به خانه</a>
</div>