/* OSO Dynamics Shared Components */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* Preload critical fonts */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 300 800;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/inter/v12/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfAZ9hiJ-Ek-_EeA.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    --primary: #2f5233; /* Seafoam Green */
    --secondary: #76b947; /* Lime Green */
    --accent: #94c973; /* Spearmint */
    --light: #b1d8b7; /* Kelly Green */
    --white: #ffffff;
    --dark: #2f5233;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--secondary) 100%);
}

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

html, body {
    height: 100%;
    font-family: 'Inter', sans-serif;
    background: url('../media/oso-bg.webp') center 85%/cover no-repeat fixed;
    background-image: url('../media/oso-bg.png'); /* Fallback for older browsers */
    color: var(--dark);
    line-height: 1.6;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header - Optimized and Smaller */
header {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem; /* Reduced padding */
}

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

.logo img {
    height: 120px; /* Increased for better visibility */
    width: auto;
    object-fit: contain;
}

/* Desktop Navigation */
nav {
    display: flex;
    gap: 2.5rem;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
}

nav a:hover {
    color: var(--accent);
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--accent);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

nav a.active {
    color: var(--accent);
}

nav a.active::after {
    width: 100%;
}

/* Mobile Hamburger Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    color: var(--accent);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    flex-direction: column;
    padding: 1rem 0;
    z-index: 1000;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    padding: 1rem 2rem;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mobile-menu a:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--accent);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

/* Main Content */
main {
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Footer */
footer {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    color: rgba(255,255,255,0.7);
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0.5rem 1rem; /* Further reduced for mobile */
    }
    
    .logo img {
        height: 90px; /* Larger on mobile for better visibility */
    }
    
    nav {
        display: none; /* Hide desktop nav on mobile */
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .mobile-menu {
        display: none;
    }
    
    .mobile-menu.active {
        display: flex;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0.5rem;
    }
    
    .logo img {
        height: 70px; /* Larger on very small screens for better visibility */
    }
    
    .container {
        padding: 0 1rem;
    }
}

/* Performance Optimizations */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    loading: lazy;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}