@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Aviation Corporate Colour Palette (from Logo) */
    --primary: #1B2B48;
    /* Dark Navy */
    --secondary: #718096;
    /* Steel Grey */
    --accent: #A12B2B;
    /* Corporate Red */
    --bg-light: #F9FAFB;
    /* Off-White */
    --text-main: #1A202C;
    /* Charcoal Black */
    --white: #FFFFFF;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Typography */
    --font-heading: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
    --font-body: 'Inter', 'Open Sans', sans-serif;

    /* Spacing & Utilities */
    --max-width: 1200px;
    --section-padding: 80px 20px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary);
    font-weight: 700;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.main-header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo .fa-plane {
    color: var(--accent);
}

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

.nav-links a {
    font-weight: 500;
    color: var(--secondary);
    font-size: 0.95rem;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-cta {
    background-color: var(--primary);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
}

.mobile-nav-toggle {
    display: none !important;
    background: none;
    border: none;
    color: var(--primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

.nav-cta:hover {
    background-color: var(--accent);
}

/* Footer */
.main-footer {
    background-color: var(--primary);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-info .logo {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-info p {
    color: #A0AEC0;
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: #A0AEC0;
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #718096;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
}

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

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

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active,
.btn-outline:active {
    transform: translateY(0);
}

/* Sections */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section-alt {
    background-color: #EDF2F7;
}

.section-dark {
    background-color: var(--primary);
    color: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    letter-spacing: -0.02em;
}

.section-title p {
    color: var(--secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-title .divider {
    width: 60px;
    height: 4px;
    background-color: var(--accent);
    margin: 20px auto 0;
    border-radius: 2px;
}

/* Cards */
.card {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.03);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.icon-box {
    width: 60px;
    height: 60px;
    background-color: rgba(31, 106, 225, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 25px;
    font-size: 1.5rem;
    transition: var(--transition);
}

.card:hover .icon-box {
    background-color: var(--accent);
    color: var(--white);
}

.card h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.card p {
    color: var(--secondary);
    font-size: 0.95rem;
    flex-grow: 1;
}

/* UI Enhancements */
.premium-gradient {
    background: linear-gradient(135deg, #1B2B48 0%, #050A14 100%);
    position: relative;
    overflow: hidden;
}

.premium-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.transparenttextures.com/patterns/carbon-fibre.png');
    opacity: 0.05;
    pointer-events: none;
}

.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 40px;
    transition: var(--transition);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.glass-card .icon-box {
    background: rgba(161, 43, 43, 0.15);
    color: var(--accent);
    border: 1px solid rgba(161, 43, 43, 0.3);
}

.glass-card h3,
.glass-card h4 {
    color: var(--white);
}

.glass-card p {
    color: #CBD5E0;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px;
    align-items: center;
}

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

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

.animate-fade {
    animation: fadeIn 0.8s ease forwards;
}

/* Regulatory Logos */
.reg-logo-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    align-items: center;
    padding: 40px 0;
}

.reg-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.6;
    transition: var(--transition);
    cursor: default;
    display: flex;
    align-items: center;
    gap: 10px;
}

.reg-logo:hover {
    opacity: 1;
    color: var(--accent);
}

.reg-logo i {
    font-size: 1.2rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-2 {
        gap: 30px;
    }
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 1.75rem;
    }

    .mobile-nav-toggle {
        display: block !important;
    }
}