/* Global Variables & Tokens */
:root {
    /* Colors */
    --color-primary: #006994;
    /* Ocean Blue */
    --color-primary-dark: #004e6e;
    --color-secondary: #00A8E8;
    /* Lighter Water Blue */
    --color-accent: #20B2AA;
    /* Light Sea Green */
    --color-text-main: #1a2a3a;
    /* Deep Navy */
    --color-text-light: #4a5a6a;
    --color-background: #ffffff;
    --color-background-alt: #f0f8ff;
    /* Alice Blue */
    --color-white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-family-base: 'Inter', system-ui, -apple-system, sans-serif;
    --font-family-heading: 'Outfit', 'Inter', sans-serif;
    --font-size-base: 16px;

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;

    /* Effects */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

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

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid var(--color-primary);
}

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

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

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

.section {
    padding: var(--spacing-xl) 0;
}

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

.text-primary {
    color: var(--color-primary);
}

/* Header & Nav */
.main-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-family-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text-main);
}

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

.lang-switch {
    margin-left: var(--spacing-md);
    display: flex;
    gap: 0.5rem;
    font-weight: 600;
}

.lang-switch a {
    color: var(--color-text-light);
    opacity: 0.7;
}

.lang-switch a:hover,
.lang-switch a.active {
    color: var(--color-primary);
    opacity: 1;
}

/* Mobile Menu Toggle (Hidden by default) */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-main);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* Hide for now, requires JS to toggle */
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        text-align: center;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
}

/* =========================================
   Component Styles (Moved from index.html)
   ========================================= */

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 40, 60, 0.4), rgba(0, 40, 60, 0.4)), url('../images/ocean-hero.png');
    background-size: cover;
    background-position: center;
    padding: 10rem 0 8rem;
    color: white;
}

.hero-title {
    font-size: 3rem;
    color: white;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Grids & Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

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

.card h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
}

/* CTA Section */
.cta-section {
    background-color: var(--color-primary);
    color: white;
}

.cta-section h2,
.cta-section p {
    color: white;
}

.cta-section .btn {
    background: white;
    color: var(--color-primary);
    border-color: white;
    margin-top: 1.5rem;
}

.cta-section .btn:hover {
    background: var(--color-background-alt);
}

/* Footer */
.main-footer {
    background: var(--color-text-main);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand p {
    color: #a0aec0;
    margin-top: 0.5rem;
}

.footer-links h4 {
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: #ccc;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-links a:hover {
    color: white;
}

.footer-legal {
    width: 100%;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #718096;
    font-size: 0.875rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

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

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

/* =========================================
   Product Page Styles
   ========================================= */
.tech-hero {
    background-color: var(--color-primary-dark);
    color: white;
    padding: 8rem 0 4rem;
}

.tech-hero h1 {
    color: white;
}

.tech-diagram {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
    text-align: center;
    border: 2px dashed #cbd5e1;
    color: #64748b;
}

.feature-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.feature-list li::before {
    content: "✓";
    color: var(--color-accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* =========================================
   Contact Page Styles
   ========================================= */
.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text-main);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-family: var(--font-family-base);
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 105, 148, 0.1);
}

.contact-info {
    padding: 2rem;
    border-radius: 12px;
    background: var(--color-primary);
    color: white;
    height: 100%;
}

.contact-info h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.contact-item {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}