:root{
    --color-bg-main : #0F1115;
    --color-hr-main : #2A2E36;
    --color-nave-main : #9AA0AA;
    --color-nave-hover : #4DFF88;
    --color-hero-bg :#1A1D23;
    --color-hero-border :#2A2E36;
    --color-docs-fornt : #eaeaea;
    --color-docs-h1 :#ffffff;
    --color-docs-intro:  #b0b0b0;
    --color-article-bg:  #1e1e1e;
    --color-artile-border:  #00b4d8;
    --color-article-font :#dddddd;
    --color-ga-sec:#eaeaea;
    --color-ga-fc: #cccccc;
    --color-ga-fb : #181818;
    --shadow-gal :0 12px 30px rgba(0, 180, 216, 0.25);
    --font-main : "Segoe UI", Tahoma, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-main);
    color: #E6E6E6;
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

hr {
    border: none;
    border-top: 1px solid var(--color-hr-main);
    margin: 48px 0;
}

/* header */
.box-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 64px;
}

.box-header p {
    display: flex;
    align-items: center;
    font-size: 21px;
    font-weight: bold;
}

.box-header img {
    width: 32px;
    margin-right: 10px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 32px;
}

nav a {
    color: var(--color-nave-main);
    transition: color 0.3s;
}

nav a:hover {
    color: var(--color-nave-hover);
}

/* hero */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding: 64px;
    align-items: center;
}

.hero-text h1 {
    font-size: 48px;
    margin-bottom: 16px;
}

.slogan {
    color: var(--color-nave-hover);
    font-size: 19px;
    margin-bottom: 24px;
}

.description {
    color: var(--color-nave-main);
    max-width: 500px;
    margin-bottom: 32px;
    font-size: 16px;
}

.cta-button {
    display: inline-block;
    padding: 12px 32px;
    background-color: var(--color-nave-hover);
    color: var(--color-bg-main);
    font-weight: bold;
    border-radius: 6px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-button:hover {
    transform: translateY(2px);
    box-shadow: 0 8px 20px rgba(77, 255, 136, 0.25);
    color: grey;
}

.hero-image figure {
    background-color:var(--color-hero-bg) ;
    border-radius: 12px;
    padding: 16px;
    border: 1px solid  var(--color-hero-border);
}

.hero-image figcaption {
    margin-top: 12px;
    font-size: 14px;
    color: var(--color-nave-main);
    text-align: center;
}

/* feature core */
.features {
    padding: 64px;
}

.features h2 {
    text-align: center;
    margin-bottom: 48px;
    font-size: 32px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background-color:  var(--color-hero-bg);
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--color-hr-main);
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(5px);
    border-color: var(--color-nave-hover);
}

.feature-card img {
    width: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 19px;
}

.feature-card p {
    color: var(--color-nave-main);
    font-size: 15px;
}

/* docs */
.docs {
    max-width: 900px;
    margin: 80px auto;
    padding: 0 20px;
    color:var(--color-docs-fornt);
    font-family: Arial, Helvetica, sans-serif;
}

.docs h1 {
    font-size: 36px;
    margin-bottom: 15px;
    color:var(--color-docs-h1) ;
}

.docs-intro {
    font-size: 18px;
    line-height: 1.6;
    color:var(--color-docs-intro);
    margin-bottom: 50px;
}

.doc-article {
    background-color: var(--color-article-bg);
    border-left: 4px solid var(--color-artile-border);
    padding: 25px 30px;
    margin-bottom: 40px;
    border-radius: 6px;
}

.doc-article h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--color-artile-border);
}

.doc-article p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-article-font)  ;
    margin-bottom: 15px;
}

.doc-article p:last-child {
    margin-bottom: 0;
}
/* gallery */
.gallery {
    max-width: 1100px;
    margin: 80px auto;
    padding: 0 20px;
    color: var(--color-ga-sec);
}


.gallery h1 {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--color-ga-sec);
}


.gallery-intro {
    font-size: 18px;
    color: var(--color-ga-sec);
    margin-bottom: 40px;
}


.gallery-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    justify-content: center;
}


.gallery-item {
    width: 320px;
    background-color:var(--color-article-bg);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}


.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.4s ease, opacity 0.4s ease;
}


.gallery-item figcaption {
    padding: 12px;
    font-size: 14px;
    text-align: center;
    color: var(--color-ga-fc);
    background-color: var(--color-ga-fb);
}


.gallery-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-gal);
}

.gallery-item:hover img {
    transform: scale(1.05);
    opacity: 0.85;
}

/* footer */
.footer {
    text-align: center;
    padding: 32px;
    border-top: 1px solid  var(--color-hr-main);
    color: var(--color-nave-main);
    font-size: 14px;
}

/* MQ */
/* برای بعضی از mq  ها برای بهبود سایت از نظر اندازه از ai  کمک گرفتم */

/* laptop */
@media (max-width: 1024px) {
    .box-header {
        padding: 20px 32px;
    }
    .hero {
        padding: 48px 32px;
    }
    .features {
        padding: 48px 32px;
    }
}
/* tablet */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }

    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
        max-width: 80%;
        margin: 0 auto;
    }

    .hero-text h1 {
        font-size: 36px;
    }
    
    .slogan {
        font-size: 17px;
    }
    
    .description {
        margin: 0 auto 32px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .box-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .docs {
        margin: 60px auto;
        padding: 0 16px;
    }
    
    .gallery {
        margin: 60px auto;
        padding: 0 16px;
    }
}

/* mobile */
@media (max-width: 768px) {
    .box-header {
        padding: 16px 24px;
    }
    
    .box-header p {
        font-size: 18px;
    }
    
    nav ul {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav li {
        font-size: 15px;
    }
    
    .hero {
        padding: 32px 24px;
    }
    
    .hero-text h1 {
        font-size: 28px;
        line-height: 1.3;
    }
    
    .slogan {
        font-size: 16px;
        margin-bottom: 16px;
    }
    
    .description {
        font-size: 15px;
        margin-bottom: 24px;
    }
    
    .cta-button {
        padding: 10px 24px;
        font-size: 15px;
        display: block;
        width: fit-content;
        margin: 0 auto;
    }
    
    .features {
        padding: 40px 24px;
    }
    
    .features h2 {
        font-size: 26px;
        margin-bottom: 32px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .feature-card h3 {
        font-size: 17px;
    }
    
    .feature-card p {
        font-size: 14px;
    }
    
    .docs h1 {
        font-size: 28px;
    }
    
    .docs-intro {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .doc-article {
        padding: 20px;
    }
    
    .doc-article h2 {
        font-size: 20px;
    }
    
    .doc-article p {
        font-size: 15px;
    }
    
    .gallery h1 {
        font-size: 28px;
    }
    
    .gallery-intro {
        font-size: 16px;
        margin-bottom: 30px;
    }
    
    .gallery-grid {
        gap: 20px;
    }
    
    .gallery-item {
        width: 100%;
        max-width: 100%;
    }
    
    .footer {
        padding: 24px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .box-header {
        padding: 12px 16px;
    }
    
    .hero {
        padding: 24px 16px;
        gap: 24px;
    }
    
    .hero-text h1 {
        font-size: 24px;
    }
    
    .hero-image {
        max-width: 100%;
    }
    
    .features {
        padding: 32px 16px;
    }
    
    .features h2 {
        font-size: 22px;
    }
    
    .feature-card img {
        width: 40px;
        margin-bottom: 16px;
    }
    
    nav ul {
        gap: 12px 20px;
    }
    
    nav li {
        font-size: 14px;
    }
    
    .docs {
        margin: 40px auto;
    }
    
    .gallery {
        margin: 40px auto;
    }
    
    .doc-article {
        padding: 16px;
        border-left-width: 3px;
    }
}