/* Base Styles */
@font-face {
    font-family: 'Vazir';
    src: url('../fonts/Vazir.eot');
    src: url('../fonts/Vazir.eot?#iefix') format('embedded-opentype'),
         url('../fonts/Vazir.woff2') format('woff2'),
         url('../fonts/Vazir.woff') format('woff'),
         url('../fonts/Vazir.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

:root {
    --primary-color: #0d6efd;
    --primary-dark: #0b5ed7;
    --primary-light: #6ea8fe;
    --secondary-color: #6c757d;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --dark: #343a40;
    --border-radius: 1rem;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Vazir', Tahoma, Arial, sans-serif;
    background-color: var(--light-bg);
    color: #333;
    line-height: 1.6;
    padding-top: 60px;
    /* background-image: url('vbvector414343.webp'); */
    /* background-size: cover; */
    /* background-position: center; */
}

/* Navigation Bar */
.navbar {
    background: linear-gradient(to left, var(--primary-color), var(--primary-dark));
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    padding: 0.5rem 1rem;
}

.navbar-brand {
    font-weight: 700;
    color: var(--white) !important;
    display: flex;
    align-items: center;
}

.navbar-brand img {
    filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.2));
    margin-left: 8px;
    transition: var(--transition);
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

.nav-link {
    color: var(--white) !important;
    font-weight: 500;
    padding: 0.7rem 1rem;
    margin: 0 0.2rem;
    border-radius: 6px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link:focus {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.nav-link i {
    margin-left: 6px;
    font-size: 0.9rem;
}

/* Hero Section */
.hero {
    /* background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); */
    background-image: url('back_hero.jpg'); 
    background-size: cover; 
    background-position: center; 
    color: var(--white);
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: flex-start; 
    /* text-align: center;  */
    font-size: 1.6rem;
    font-weight: 700;
    box-shadow: inset 0 -4px 10px rgba(0, 0, 0, 0.1);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
} 
.hero-text {
    width: 70%;            /*   کل عرض hero رو بگیره */
    text-align: left;         /* متن‌ها راست‌چین بشن */
    padding-right: 2rem;       /* فاصله از راست */
    display: flex;
    flex-direction: column;
    align-items: flex-start;    /* آیتم‌ها (مثل h1 و p) به راست بچسبن */
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    animation: pulse 15s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.2); opacity: 0.6; }
    100% { transform: scale(1); opacity: 0.3; }
}

/* Section Headers */
h2 {
    position: relative;
    font-size: 1.5rem;
    color: var(--primary-dark);
    font-weight: 700;
    padding-bottom: 10px;
    margin-bottom: 25px;
}

h2::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(to left, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

/* Cards */
.section-card {
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--white);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    padding: 1.2rem;
    margin-bottom: 1.5rem;
}

.section-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.section-card h5 {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.15rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.section-card h5 i {
    margin-left: 8px;
    color: var(--primary-color);
}

/* Services Section */
.service-item {
    background-color: rgba(13, 110, 253, 0.05);
    border-radius: 0.8rem;
    padding: 15px;
    margin-bottom: 15px;
    transition: var(--transition);
    border-right: 3px solid var(--primary-light);
}

.service-item:hover {
    background-color: rgba(13, 110, 253, 0.08);
    transform: translateX(-3px);
}

.service-item h5 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.service-item p {
    font-size: 0.95rem;
    margin-bottom: 0;
    color: var(--secondary-color);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
}

.contact-item {
    background-color: rgba(13, 110, 253, 0.05);
    border-radius: 0.8rem;
    padding: 15px;
    transition: var(--transition);
    border-right: 3px solid var(--primary-light);
}

.contact-item:hover {
    background-color: rgba(13, 110, 253, 0.08);
    transform: translateX(-3px);
}

.contact-item h5 {
    display: flex;
    align-items: center;
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.contact-item h5 i {
    margin-left: 8px;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.contact-item p {
    font-size: 0.95rem;
    margin-bottom: 0;
    color: var(--secondary-color);
}

/* Footer */
footer {
    background: linear-gradient(to left, var(--primary-color), var(--primary-dark));
    color: var(--white);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.5), transparent);
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .navbar-collapse {
        background-color: var(--primary-dark);
        padding: 1rem;
        border-radius: 0.8rem;
        margin-top: 0.5rem;
    }
    
    .hero {
        height: 200px;
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .hero {
        height: 180px;
        font-size: 1.3rem;
        padding: 20px;
    }
    
    h2 {
        font-size: 1.3rem;
    }
    
    .section-card {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .hero {
        height: 160px;
        font-size: 1.2rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Utility Classes */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-light-blue {
    background-color: rgba(13, 110, 253, 0.05);
}

.shadow-sm {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05) !important;
}

.rounded-xl {
    border-radius: var(--border-radius) !important;
}

.activity-image {
    width: 100%;
    height: 350px;            /* یا هر ارتفاع دلخواه */
    background-size: cover;
    background-position: center;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

/* فعالیت اول: هوش مصنوعی */
.activity-item.ai .activity-image {
    background-image: url('header-chat-box.png');
  }
  
  /* فعالیت دوم: اینترنت اشیا */
  .activity-item.iot .activity-image {
    background-image: url('RAG.png');
  }
  
  /* فعالیت سوم: امنیت سایبری */
  .activity-item.cyber .activity-image {
    background-image: url('Data mining and big data analysis.jfif');
  }
  
  /* فعالیت چهارم: پردازش داده */
  /* .activity-item.data .activity-image {
    background-image: url('header-chat-box.png');
  }
   */

/* رنگ پس‌زمینه و متن تب "هوش مصنوعی" */
#ai-tab.nav-link {
    background-color: #9fd7e3 !important;
    color: rgba(218, 192, 192, 0.594) !important;
}

/* تب "برنامه‌نویسی" */
#dev-tab.nav-link {
    background-color: #9fd7e3 !important;
    color: rgba(218, 192, 192, 0.594) !important;
}

/* تب فعال */
#ai-tab.nav-link.active,
#dev-tab.nav-link.active {
    background-color: #4CAF50 !important;
    color: white !important;
}

/* هنگام هاور */
#ai-tab.nav-link:hover,
#dev-tab.nav-link:hover {
    background-color: #777 !important;
    color: white !important;
}