/* --- CSS Variables for Theming --- */
:root {
    --primary-color: #0a4d68;
    --secondary-color: #088395;
    --accent-color: #05bfdb;
    --light-color: #eef7ff;
    --text-color: #333;
    --bg-color: #ffffff;
    --card-bg-color: #f9f9f9;
    --header-bg: rgba(255, 255, 255, 0.85);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    --font-primary: 'Vazirmatn', 'Inter', sans-serif;
    --transition: all 0.5s ease-in-out;
}

[data-theme="dark"] {
    --primary-color: #05bfdb;
    --secondary-color: #00fff0;
    --accent-color: #ffc107;
    --light-color: #1a1a1a;
    --text-color: #e0e0e0;
    --bg-color: #121212;
    --card-bg-color: #1e1e1e;
    --header-bg: rgba(18, 18, 18, 0.85);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

html[dir="ltr"] {
    --font-primary: 'Inter', 'Vazirmatn', sans-serif;
}

/* --- Animated Gradient Background --- */
body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
    position: relative;
    margin: 0;
    padding: 0;
}

/* Layered animated background: base animated gradient + soft radial blobs for depth */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(115deg, rgba(5,191,219,0.12), rgba(8,131,149,0.08)), linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    background-blend-mode: screen, normal;
    background-size: 300% 300%, 400% 400%;
    z-index: -2;
    animation: gradientShift 30s ease infinite, parallax 80s linear infinite;
    opacity: 1;
    transform: translateZ(0);
    pointer-events: none;
}

/* soft floating radial accents */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: radial-gradient(800px 400px at 10% 20%, rgba(255,255,255,0.06), transparent 10%),
                      radial-gradient(600px 300px at 85% 80%, rgba(5,191,219,0.06), transparent 12%),
                      radial-gradient(400px 200px at 50% 10%, rgba(8,131,149,0.04), transparent 14%);
    filter: blur(30px);
    opacity: 0.9;
    transform: translateZ(0);
    animation: floatBlobs 18s ease-in-out infinite;
    pointer-events: none;
}

[data-theme="dark"] body::before {
    opacity: 0.9;
    background: linear-gradient(115deg, rgba(5,191,219,0.06), rgba(0,0,0,0.06)), linear-gradient(45deg, #05232b, #06353a, #0b3e4a);
}

[data-theme="dark"] body::after {
    opacity: 0.6;
    background-image: radial-gradient(800px 400px at 10% 20%, rgba(255,255,255,0.02), transparent 10%),
                      radial-gradient(600px 300px at 85% 80%, rgba(5,191,219,0.03), transparent 12%),
                      radial-gradient(400px 200px at 50% 10%, rgba(8,131,149,0.02), transparent 14%);
    filter: blur(36px) saturate(0.9);
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes parallax {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50px); }
}

@keyframes floatBlobs {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-10px) scale(1.02); }
    100% { transform: translateY(0) scale(1); }
}

/* --- Global Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.animate-fadeInUp {
    animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.8s ease-out forwards;
}

.animate-fadeInRight {
    animation: fadeInRight 0.8s ease-out forwards;
}

.animate-zoomIn {
    animation: zoomIn 0.6s ease-out forwards;
}

/* --- Container and Typography --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    color: var(--primary-color);
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--secondary-color);
}

section {
    padding: 80px 0;
    opacity: 0;
    transition: opacity 0.5s ease;
}

section.visible {
    opacity: 1;
}

/* --- Header --- */
header {
    background-color: var(--header-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 0.75rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1001;
    box-shadow: var(--shadow);
    transition: transform 0.6s ease-in-out;
    transform: translateY(0);
}

@media (max-width: 768px) {
    header.hide {
        transform: translateY(-100%);
    }
}

/* Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: var(--bg-color);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    border: none;
    box-shadow: var(--shadow);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0 1.5rem;
    direction: ltr; /* Force LTR layout for header */
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    transition: var(--transition);
    flex: 1;
    text-align: center;
    order: 2;
}

.logo:hover {
    transform: scale(1.05);
}

/* Header controls */
.header-controls {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 50px;
}

.header-controls.theme-control {
    justify-content: flex-start;
    order: 1; /* Left side */
}

.header-controls.lang-control {
    justify-content: flex-end;
    order: 3; /* Right side */
}

.theme-toggle, .lang-toggle {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover, .lang-toggle:hover {
    background-color: var(--primary-color);
    color: var(--bg-color);
    transform: rotate(360deg) scale(1.1);
}

/* --- Hero Section with Slider --- */
#hero {
    margin-top: 0; /* Adjusted dynamically in JS */
    height: 90vh;
    position: relative;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    text-align: center;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.6);
    padding: 3rem;
    border-radius: 15px;
    max-width: 800px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.slide.active .slide-content {
    opacity: 1;
    transform: translateY(0);
    animation: zoomIn 1s ease-out;
}

.slide-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* --- Hero Slider Controls --- */
.slider-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: none;
    padding: 1rem 1.2rem;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.slider-control:hover {
    background-color: rgba(255, 255, 255, 0.4);
    color: var(--primary-color);
}

.slider-prev {
    left: 0;
    border-radius: 0 8px 8px 0;
}

.slider-next {
    right: 0;
    border-radius: 8px 0 0 8px;
}

/* --- About Section --- */
#about {
    background-color: var(--light-color);
}
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.about-text h2 {
    text-align: center;
}
.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.about-image img:hover {
    transform: scale(1.05);
}

/* --- Services Section --- */
#services {
    background: var(--bg-color);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background-color: var(--card-bg-color);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0;
    transform: translateY(20px);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 0.6s ease-out forwards;
}

.service-card:hover {
    transform: translateY(-20px) scale(1.05);
    box-shadow: 0 20px 45px rgba(0,0,0,0.25);
}

.service-card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.service-card i {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.service-card:hover i {
    transform: rotate(360deg) scale(1.2);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

/* --- Gallery Section (New Attractive Layout) --- */
#gallery {
    background-color: var(--light-color);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 200px;
    gap: 1rem;
    margin-top: 3rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    transform: scale(0.9);
    background-color: var(--card-bg-color);
}

.gallery-item.visible {
    opacity: 1;
    transform: scale(1);
    animation: zoomIn 0.6s ease-out forwards;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 20px 45px rgba(0,0,0,0.25);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: var(--transition);
}

.gallery-item:hover img {
    transform: scale(1.1);
    filter: brightness(0.8);
}

/* Layout variations for gallery */
.gallery-item--wide {
    grid-column: span 2;
}
.gallery-item--tall {
    grid-row: span 2;
}

/* --- Video Section --- */
#video-section {
    background-color: var(--light-color);
    text-align: center;
}
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 900px;
    margin: 3rem auto 0;
    border-radius: 0;
    box-shadow: none;
    transition: var(--transition);
}
.video-wrapper:hover {
    transform: none;
}
.video-wrapper iframe,
.video-wrapper embed,
.video-wrapper object,
.video-wrapper > div > iframe {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    display: block !important;
}

/* --- Contact Section --- */
#contact {
    text-align: center;
}
.contact-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}
.contact-info a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
    padding: 1rem 1.5rem;
    background-color: var(--card-bg-color);
    border-radius: 50px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.contact-info a:hover {
    transform: scale(1.1) rotate(5deg);
    color: var(--primary-color);
}
.contact-info i {
    font-size: 1.5rem;
    transition: var(--transition);
}
.contact-info a:hover i {
    transform: scale(1.2);
}

/* --- Floating Contact Buttons --- */
.floating-contact {
    position: fixed;
    bottom: 30px;
    left: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-20px);
    transition: var(--transition);
    pointer-events: none;
}

.floating-contact.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
    pointer-events: all;
}

.floating-contact a {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transition: var(--transition);
}
.floating-contact a:hover {
    transform: scale(1.2) rotate(360deg);
}
.floating-contact .whatsapp { background-color: #25D366; }
.floating-contact .telegram { background-color: #0088cc; }
.floating-contact .instagram { background: linear-gradient(45deg, #f09433 0%,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888 100%); }
.floating-contact .phone { background-color: var(--primary-color); }

/* --- Footer --- */
footer {
    background-color: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    transition: var(--transition);
}

footer:hover {
    background-color: var(--secondary-color);
}

/* --- Responsive Design Enhancements --- */
/* Optimized for tablets (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 769px) {
    .container {
        padding: 0 30px;
    }
    .header-container {
        gap: 1rem;
        padding: 0 2rem;
    }
    .logo {
        font-size: 1.7rem;
    }
    .theme-toggle, .lang-toggle {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }
    #hero {
        height: 85vh;
    }
    .slide-content h1 {
        font-size: 3.2rem;
    }
    .slide-content p {
        font-size: 1.1rem;
    }
    .slide-content {
        padding: 2.5rem;
        max-width: 85%;
    }
    .about-content {
        grid-template-columns: 1fr 1fr;
        gap: 2.5rem;
    }
    .about-text h2 {
        font-size: 2.3rem;
    }
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.5rem;
    }
    .service-card {
        padding: 2rem;
    }
    .service-card h3 {
        font-size: 1.4rem;
    }
    .service-card p {
        font-size: 0.95rem;
    }
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }
    .video-wrapper {
        max-width: 80%;
    }
    .contact-info {
        gap: 1.5rem;
    }
    .contact-info a {
        font-size: 1.1rem;
        padding: 0.9rem 1.4rem;
    }
    .floating-contact a {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    h2 {
        font-size: 2.3rem;
    }
}

/* Mobile devices (up to 768px) */
@media (max-width: 768px) {
    #hero { height: 80vh; }
    header { padding: 0.5rem 0; }
    .header-container { 
        gap: 0.5rem; 
        flex-wrap: nowrap; 
        justify-content: space-between;
        padding: 0 1rem;
        direction: ltr;
    }
    .header-controls { 
        margin: 0; 
        flex-shrink: 0;
    }
    .logo { 
        order: 2; 
        flex: 1;
        font-size: 1.4rem;
        text-align: center;
        padding: 0 0.5rem;
    }
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    .about-image {
        max-width: 90%;
        margin: 0 auto;
    }
    .about-text { text-align: center; }
    .slide-content h1 { font-size: 2.5rem; }
    .slide-content p { font-size: 1rem; }
    .slide-content { padding: 2rem; max-width: 90%; }
    h2 { font-size: 2rem; }
    .services-grid { grid-template-columns: 1fr; }
    
    .gallery-grid { 
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: auto; 
        gap: 0.75rem;
    }

    .gallery-item,
    .gallery-item--tall {
        grid-column: auto;
        grid-row: auto;
        aspect-ratio: 1 / 1; 
    }

    .gallery-item--wide {
        grid-column: span 2; 
        aspect-ratio: 16 / 9;
    }
    
    .floating-contact { bottom: 20px; left: 20px; gap: 10px; }
    .floating-contact a { width: 50px; height: 50px; font-size: 1.2rem; }
    section { padding: 60px 0; }
    .container { padding: 0 15px; }
    .theme-toggle, .lang-toggle { width: 40px; height: 40px; font-size: 1rem; }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }
    .slide-content {
        padding: 1.5rem;
    }
    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    .contact-info a {
        width: 90%;
        justify-content: center;
        padding: 0.8rem 1.2rem;
        font-size: 1rem;
    }
    .service-card { padding: 2rem; }
    .service-card h3 { font-size: 1.3rem; }
    .service-card p { font-size: 0.9rem; }
    h2 { font-size: 1.8rem; }
    .theme-toggle, .lang-toggle { width: 35px; height: 35px; font-size: 0.9rem; }

    /* ===== START: UNIFY GALLERY IMAGES ON SMALL MOBILE ===== */
    .gallery-grid {
        grid-template-columns: 1fr; /* Change to single column */
    }
    .gallery-item,
    .gallery-item--wide,
    .gallery-item--tall {
        grid-column: auto; /* Reset column span */
        grid-row: auto; /* Reset row span */
        aspect-ratio: 16 / 10; /* Make all items the same landscape shape */
    }
    /* ===== END: UNIFY GALLERY IMAGES ON SMALL MOBILE ===== */
}

/* --- Image Optimization --- */
img {
    max-width: 100%;
    height: auto;
    display: block;
}