:root {
    --sepehrno-dark-bg: #030712;
    --sepehrno-card-bg: rgba(255, 255, 255, 0.02);
    --sepehrno-card-border: rgba(255, 255, 255, 0.05);
    --sepehrno-card-hover-border: rgba(59, 130, 246, 0.5);
    --sepehrno-primary-blue: #3b82f6;
    --sepehrno-light-blue: #60a5fa;
    --sepehrno-text-gray: #9ca3af;
    --sepehrno-header-shadow: 0 0 10px rgba(59, 130, 246, 0.6);
    --sepehrno-header-dot-shadow: 0 0 12px 2px rgba(96, 165, 250, 0.8);
    --sepehrno-gradient-line: linear-gradient(90deg, transparent, var(--sepehrno-primary-blue), var(--sepehrno-light-blue), var(--sepehrno-primary-blue), transparent);
    --sepehrno-card-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    --sepehrno-font-family: 'Vazirmatn', sans-serif;
    --sepehrno-button-gradient: linear-gradient(90deg, #2563eb, #3b82f6);
    --sepehrno-glow-overlay-color: rgba(3, 7, 18, 0.65);
    --sepehrno-info-bg: #0b1120;
    --sepehrno-info-border-top: rgba(255, 255, 255, 0.05);
    --sepehrno-info-category-bg: rgba(59, 130, 246, 0.15);
}

.portfolio-section {
    background-color: var(--sepehrno-dark-bg);
    padding: 80px 20px;
    direction: rtl;
    font-family: var(--sepehrno-font-family);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.portfolio-header {
    margin-bottom: 60px;
    position: relative;
    z-index: 2;
}

.portfolio-header h2 {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
}

.sepehrno-title-glow-line { 
    width: 120px; 
    height: 3px; 
    background: var(--sepehrno-gradient-line); 
    margin: 0 auto; 
    position: relative; 
    box-shadow: var(--sepehrno-header-shadow);
    border-radius: 2px;
}

.sepehrno-title-glow-line::after { 
    content: ''; 
    position: absolute; 
    top: 50%; 
    transform: translateY(-50%); 
    right: -10px; 
    width: 10px; 
    height: 10px; 
    background-color: #93c5fd;
    box-shadow: var(--sepehrno-header-dot-shadow);
    border-radius: 50%;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 30px;
    max-width: 1300px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.portfolio-card {
    background: var(--sepehrno-card-bg);
    border: 1px solid var(--sepehrno-card-border);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: var(--sepehrno-card-shadow);
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), border-color 0.4s ease, box-shadow 0.4s ease;
    will-change: transform;
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(59, 130, 246, 0.3);
    border-color: var(--sepehrno-card-hover-border);
}

/* ساختار جدید شبیه‌ساز مرورگر */
.portfolio-browser-mockup {
    height: 380px; 
    position: relative;
    background: #1e293b;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.browser-top-bar {
    height: 30px;
    background: #0f172a;
    display: flex;
    align-items: center;
    padding: 0 15px;
    gap: 6px;
    flex-shrink: 0;
    z-index: 3;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.browser-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.browser-dot.red { background: #ef4444; }
.browser-dot.yellow { background: #eab308; }
.browser-dot.green { background: #22c55e; }

.browser-content {
    position: relative;
    width: 100%;
    height: 350px; /* 380px - 30px */
    overflow: hidden;
}

/* حل مشکل نمایش عکس از ابتدا: تصویر اکنون در top:0 لنگر انداخته است */
.portfolio-image {
    width: 100%;
    height: auto;
    position: absolute;
    top: 0;
    left: 0;
    transform: translateY(0) translateZ(0);
    transition: transform 4.5s cubic-bezier(0.25, 1, 0.5, 1); 
    will-change: transform;
}

/* اسکرول روان از بالاترین نقطه سایت به سمت پایین روی هاور کارت */
.portfolio-card:hover .portfolio-image {
    transform: translateY(calc(-100% + 350px)) translateZ(0); 
}

.portfolio-overlay {
    position: absolute;
    inset: 30px 0 0 0; /* زیر تاپ‌بار مرورگر قرار می‌گیرد */
    background: var(--sepehrno-glow-overlay-color);
    backdrop-filter: blur(3px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 5;
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.view-site-btn {
    background: var(--sepehrno-button-gradient);
    color: #ffffff;
    padding: 11px 26px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.3);
    transform: translateY(15px);
    transition: all 0.4s ease;
    opacity: 0;
    display: inline-block;
}

.trigger-details-btn {
    background: transparent;
    color: #ffffff;
    border: 1px solid var(--sepehrno-primary-blue);
    padding: 10px 26px;
    border-radius: 30px;
    font-family: var(--sepehrno-font-family);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transform: translateY(15px);
    transition: all 0.4s ease;
    opacity: 0;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.1);
}

.portfolio-card:hover .view-site-btn,
.portfolio-card:hover .trigger-details-btn {
    transform: translateY(0);
    opacity: 1;
}

.view-site-btn:hover {
    box-shadow: 0 0 25px rgba(59, 130, 246, 0.8);
    transform: scale(1.03);
    color: #fff;
}

.trigger-details-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
    border-color: var(--sepehrno-light-blue);
}

.portfolio-info {
    padding: 20px;
    background: var(--sepehrno-info-bg);
    border-top: 1px solid var(--sepehrno-info-border-top);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.portfolio-info h3 {
    color: #ffffff;
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.portfolio-category {
    color: var(--sepehrno-light-blue);
    font-size: 0.85rem;
    background: var(--sepehrno-info-category-bg);
    padding: 4px 12px;
    border-radius: 15px;
    font-weight: 500;
}

/* پنل جزئیات هوشمند - کاملاً متکی به CSS و فوق‌العاده سریع */
.portfolio-details {
    position: absolute;
    inset: 0;
    background: rgba(3, 7, 18, 0.98);
    backdrop-filter: blur(10px);
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: right;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 10;
}

/* باز شدن هوشمند پنل جزئیات فقط با هاور روی دکمه یا خود پنل */
.trigger-details-btn:hover + .portfolio-details,
.portfolio-details:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.portfolio-details h4 {
    font-size: 1.1rem;
    color: var(--sepehrno-light-blue);
    margin-bottom: 5px;
}

.portfolio-details h4 .highlight-text {
    color: #fff;
}

.portfolio-details p {
    font-size: 0.9rem;
    color: var(--sepehrno-text-gray);
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-bottom: 10px;
}

.description-title {
    font-size: 1rem;
    color: #ffffff;
    font-weight: 700;
    margin-bottom: 8px;
}

.description-text {
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--sepehrno-text-gray);
    max-height: 100px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--sepehrno-primary-blue) transparent;
}

.description-text::-webkit-scrollbar { width: 4px; }
.description-text::-webkit-scrollbar-track { background: transparent; }
.description-text::-webkit-scrollbar-thumb { background-color: var(--sepehrno-primary-blue); border-radius: 4px; }

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    .portfolio-browser-mockup {
        height: 330px;
    }
    .browser-content {
        height: 300px;
    }
    .portfolio-card:hover .portfolio-image {
        transform: translateY(calc(-100% + 300px)) translateZ(0); 
    }
}