:root {
    --primary-color: #0056b3;
    --primary-hover: #004494;
    --secondary-color: #f7f9fc;
    --accent-color: #00a8ff;
    --text-main: #333333;
    --text-muted: #666666;
    --bg-main: #ffffff;
    --bg-light: #f4f7f6;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 15px 30px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
}

body {
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5 {
    font-family: 'Outfit', sans-serif;
    color: #1a202c;
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

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

.logo img {
    height: 80px;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-muted);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--primary-color);
    transition: width var(--transition-speed);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.btn-contact {
    background: var(--primary-color);
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 50px;
    transition: background var(--transition-speed);
}

.btn-contact::after {
    display: none;
}

.btn-contact:hover {
    background: var(--primary-hover);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* Button Utilities */
.btn {
    padding: 12px 28px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), background var(--transition-speed);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 6px 20px rgba(0, 86, 179, 0.6);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.btn-full {
    width: 100%;
}

/* Page Section Management */
#main-content {
    margin-top: 80px;
}

.page-section {
    display: none;
    min-height: calc(100vh - 80px);
    padding: 60px 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}

.active-page {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.title-underline {
    height: 4px;
    width: 60px;
    background: var(--accent-color);
    margin: 0 auto;
    border-radius: 2px;
}

/* ==================================
             HOME SECTION
   ================================== */
.hero {
    height: calc(100vh - 80px);
    background: url('images/AirMaster_BG_Img1.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    margin-top: -60px;
    /* Offset the section padding */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 31, 63, 0.85) 0%, rgba(0, 86, 179, 0.6) 100%);
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 60%;
    height: 80%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 20px;
    max-width: 975px;
    margin-top: -100px; /* Align content slightly up to prevent overlap with background text */
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #ffffff;
    text-shadow: 0 5px 20px rgba(0, 0, 0, 0.8), 0 0 15px rgba(0, 0, 0, 0.6);
    animation: slideDown 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 40px;
    line-height: 1.6;
    text-shadow: 0 3px 15px rgba(0, 0, 0, 0.8);
    animation: slideUp 0.8s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeIn 0.8s ease-out 0.4s backwards;
}

.hero .btn-secondary {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.8);
}

.hero .btn-secondary:hover {
    background-color: #ffffff;
    color: var(--primary-color);
}

.brands-section {
    padding: 60px 20px;
    text-align: center;
    background: #fff;
}

.section-heading-small {
    font-size: 1.2rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 30px;
}

.brands-grid {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
    align-items: center;
}

.brand-item {
    width: 160px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.brand-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* Keeps the logo fully visible and contained within the box */
    mix-blend-mode: multiply;
    /* Helps blend white backgrounds of logos */
    transition: transform var(--transition-speed);
}

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

/* ==================================
           PROFILE SECTION
   ================================== */
.profile-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.text-box {
    background: #fff;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    line-height: 1.8;
}

.text-box h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.text-box p {
    margin-bottom: 15px;
    color: var(--text-muted);
}

.mission-vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: #fff;
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    color: var(--text-muted);
    line-height: 1.6;
}

.clients-section {
    background: var(--bg-light);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
}

.clients-section h3 {
    margin-bottom: 30px;
}

.clients-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.clients-list span {
    background: #fff;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transition: background 0.3s, color 0.3s;
}

.clients-list span:hover {
    background: var(--primary-color);
    color: #fff;
}

/* ==================================
          SERVICES SECTION
   ================================== */
.services-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 30px;
    background: transparent;
    border: 2px solid var(--border-radius);
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.3);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.active-tab {
    display: block;
}

.tab-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

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

.card-img {
    max-width: none;
    display: block;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.service-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed);
    overflow: hidden;
}

.service-card .card-img {
    width: calc(100% + 60px);
    height: 200px;
    object-fit: cover;
    margin: -40px -30px 20px -30px;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--primary-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-category {
    background: #fff;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.product-category .card-img {
    width: calc(100% + 60px);
    height: 200px;
    object-fit: cover;
    margin: -30px -30px 20px -30px;
}

.product-category h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-category ul {
    list-style: none;
}

.product-category ul li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    color: var(--text-muted);
    position: relative;
    padding-left: 20px;
}

.product-category ul li::before {
    content: '•';
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.product-category ul li:last-child {
    border-bottom: none;
}

/* ==================================
          CONTACT SECTION
   ================================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.contact-info {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #fff;
    padding: 50px;
}

.contact-info h3 {
    color: #fff;
    font-size: 2rem;
    margin-bottom: 15px;
}

.contact-info p {
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.5rem;
    margin-top: 5px;
    color: var(--accent-color);
}

.info-item strong {
    display: block;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.info-item p {
    margin-bottom: 0;
    opacity: 0.8;
}

.contact-form-container {
    padding: 50px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
footer {
    background: #1a202c;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 40px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo img {
    background: #fff;
    padding: 5px;
    border-radius: 8px;
}

.footer-logo p {
    font-size: 1.2rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* Animations & Utilities */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

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

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.mt-5 {
    margin-top: 50px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
        box-shadow: var(--shadow-md);
    }

    .nav-menu.open {
        max-height: 400px;
    }

    .nav-link {
        padding: 20px;
        text-align: center;
        width: 100%;
        border-bottom: 1px solid #f0f0f0;
    }

    .btn-contact {
        border-radius: 0;
        background: transparent;
        color: var(--primary-color) !important;
    }

    .mobile-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}