/* Base Styles & Variables */
:root {
    --primary: #ff7b00; /* Vibrant Orange for gas/energy */
    --primary-glow: rgba(255, 123, 0, 0.4);
    --secondary: #007bff; /* Trustworthy Blue */
    --bg-dark: #0f172a; /* Deep Slate */
    --bg-darker: #020617; /* Very Deep Slate */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    overflow-x: hidden;
    width: 100%;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Vazirmatn', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

.bg-darker {
    background-color: var(--bg-darker);
}

.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

/* Glassmorphism Utilities */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.hover-effect:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 40px var(--primary-glow);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
}

.section-title {
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-main);
}

.section-title p {
    color: var(--text-muted);
    margin-top: 10px;
    font-size: 1.1rem;
}

.underline {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin-top: 10px;
}

.underline.center {
    margin: 10px auto 0;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary), #d96a00);
    color: #fff;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: var(--transition);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px var(--primary-glow);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-block;
    padding: 12px 28px;
    background: transparent;
    color: var(--text-main);
    border-radius: 8px;
    font-weight: 600;
    border: 2px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Header & Navbar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 0;
    transition: var(--transition);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a:not(.btn-primary) {
    font-weight: 400;
    position: relative;
}

.nav-links a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:not(.btn-primary):hover::after {
    width: 100%;
}

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: url('../hero_gas_bg.png') no-repeat center center/cover;
}

.hero .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    text-align: center;
    padding: 50px;
    background: rgba(15, 23, 42, 0.3); /* Lower opacity for more transparency */
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.05); /* Lighter border */
}

.system-title {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 10px;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.hero-content h2 {
    font-size: 2rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.4rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 30px;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.info-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 1.1rem;
    padding: 15px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}

.info-list i {
    color: var(--secondary);
    font-size: 1.2rem;
}

.board-card h3 {
    margin-bottom: 25px;
    font-size: 1.5rem;
    text-align: center;
}

.board-members {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.member {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(255,255,255,0.03);
    border-radius: 12px;
    transition: var(--transition);
}

.member:hover {
    background: rgba(255,255,255,0.08);
}

.member .avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary), #0056b3);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
}

.member h4 {
    font-size: 1.1rem;
}

.member span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    text-align: center;
    padding: 40px 30px;
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background: rgba(255, 123, 0, 0.1);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 25px;
    font-size: 2.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.service-card:hover .icon-wrapper {
    background: var(--primary);
    color: #fff;
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-muted);
}

/* Karvar Section */
.karvar-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    background: linear-gradient(135deg, var(--glass-bg), rgba(0, 123, 255, 0.1));
    border-left: 4px solid var(--secondary);
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    background: var(--secondary);
    color: #fff;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.karvar-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.karvar-text p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.karvar-contact h3 {
    margin-bottom: 20px;
    color: var(--secondary);
}

.karvar-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
}

.karvar-contact ul li:last-child {
    border-bottom: none;
}

.karvar-contact i {
    color: var(--primary);
    margin-top: 5px;
}

/* Footer */
.footer {
    background: #020617;
    border-top: 1px solid var(--glass-border);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-about .logo {
    margin-bottom: 20px;
}

.footer-about p {
    color: var(--text-muted);
    max-width: 300px;
}

.footer h3 {
    font-size: 1.2rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 40px;
    height: 2px;
    background: var(--primary);
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    color: var(--text-muted);
}

.contact-list i {
    color: var(--primary);
    margin-top: 5px;
}

.footer-links ul li {
    margin-bottom: 15px;
}

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

.footer-links a:hover {
    color: var(--primary);
    padding-right: 5px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animations */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 992px) {
    .about-grid, .karvar-content, .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .hero {
        min-height: 100vh;
        height: auto;
        padding: 100px 0 60px;
    }

    .system-title {
        font-size: 3rem;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        background: rgba(15, 23, 42, 0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: 1px solid var(--glass-border);
        padding: 100px 30px 40px;
        gap: 20px;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links a:not(.btn-primary) {
        width: 100%;
        font-size: 1.1rem;
        padding: 12px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-links a:not(.btn-primary)::after {
        display: none; /* Disable hover underline on mobile side-menu */
    }

    .nav-links a.btn-primary {
        text-align: center;
        margin-top: 15px;
        width: 100%;
    }
    
    .mobile-menu {
        display: block;
        z-index: 1001;
        position: relative;
        color: var(--text-main);
        transition: var(--transition);
    }
    
    .mobile-menu:hover {
        color: var(--primary);
    }

    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero {
        min-height: 100vh;
        height: auto;
        padding: 90px 0 50px;
    }

    .hero-content {
        padding: 30px 20px;
    }

    .system-title {
        font-size: 2.2rem;
    }
    
    .hero-content h2 {
        font-size: 1.4rem;
        margin-bottom: 15px;
    }

    .hero-content p {
        font-size: 1.1rem;
        margin-bottom: 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .section-padding {
        padding: 60px 0;
    }
}