/* ============================================
   CSS Custom Properties (Variables)
   ============================================ */
:root {
    /* Colors - Professional Blue Palette */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #eeeeee;
    --color-text-primary: #212529;
    --color-text-secondary: #6c757d;
    --color-accent: #0066cc;
    --color-accent-hover: #0052a3;
    --color-accent-light: #e8eaf6;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-2xl: 96px;

    /* Layout */
    --container-width: 1440px;
    --nav-height: 90px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

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

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

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: #555555;
}

.section-title-rev {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: left;
    color: #555555;
}

.section-intro {
    font-size: 1.8em;
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 1100px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.5em;
}

.content-text {
    max-width: 800px;
    margin: 0 auto;
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: #ffffff;
}
.content-text-rev {
    max-width: 800px;
    margin: 0 auto;
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: #555555;
}

.content-text p {
    margin-bottom: var(--spacing-md);
}

.content-text-rev p {
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-container {
    padding: 0 30px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
}

.nav-logo img {
    height: 45px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    font-weight: 600;
    gap: var(--spacing-md);
}

.nav-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--color-bg-secondary);
}

.nav-cta {
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 4px;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000000;
    padding-top: var(--nav-height);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2;
    pointer-events: none;
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: var(--spacing-md);
    max-width: 900px;
}

.hero-headline {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    letter-spacing: .02em;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: #ffffff;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-headline.fade-out {
    opacity: 0;
}

.hero-headline.fade-in {
    opacity: 1;
}

.hero-subtext {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.8);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* ============================================
   What We Do Section
   ============================================ */
.what-we-do {
    background-color: var(--color-bg-primary);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: #ffffff;
    border-radius: 0px;
    overflow: hidden;
}

.feature-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-card h3 {
    font-size: 1.1em;
    font-weight: 600;
    margin: 16px 0 10px 0;
}

.feature-card p {
    margin: 10px 0;
    color: var(--color-text-secondary);
}

/* ============================================
   Who We Are Section
   ============================================ */
.who-we-are {
    padding: 0;
}

.who-we-are-split {
    display: flex;
    min-height: 600px;
}

.who-we-are-image {
    flex: 1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.who-we-are-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.who-we-are-text {
    flex: 1;
    background-color: #f6f6f6;
    display: flex;
    align-items: center;
    justify-content: left;
}

.who-we-are-text-content {
    padding: var(--spacing-lg);
    max-width: 700px;
}

/* ============================================
   Why Us Section
   ============================================ */
.why-us {
    background-color: #ffffff;
}

.why-us-overlay {
    padding: var(--spacing-sm) 0;
}

.why-card {
    padding: var(--spacing-md);
}

.why-card h3 {
    margin-top: 0;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background-color: #f6f6f6;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-bg-secondary);
    border-radius: 4px;
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    border-radius: 4px;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-submit:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn-submit:active {
    transform: translateY(0);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.social-icon:hover {
    background-color: var(--color-accent);
    transform: scale(1.1);
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-bg-primary);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

/* ============================================
   Responsive Design - Tablet
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --font-size-3xl: 40px;
        --font-size-2xl: 28px;
        --spacing-xl: 48px;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
        z-index: 1002;
        position: relative;
    }

    .nav-toggle span {
        background-color: var(--color-text-primary);
    }

    .nav-toggle.active span {
        background-color: #ffffff;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(36, 64, 141, 0.93);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
        z-index: 1001;
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }

  .nav-link {
        padding: var(--spacing-sm);
        text-align: center;
        color: #ffffff;
        background-color: rgba(255, 255, 255, 0);
        font-size: var(--font-size-2xl);
        font-weight: 400;
    }

    .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }

    .nav-cta {
        margin-top: var(--spacing-sm);
        color: #ffffff;
    }

    .nav-cta:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-8px);
    }
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 32px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
        --font-size-lg: 16px;
        --spacing-lg: 32px;
        --spacing-xl: 40px;
    }

    .section-intro {
        font-size: 1.4em;
    }

    /* Grid adjustments */
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Hero adjustments */
    .hero-headline {
        min-height: 150px;
    }

    /* Section spacing */
    .section {
        padding: var(--spacing-lg) 0;
    }

    /* Who We Are - Stack vertically on mobile */
    .who-we-are-split {
        flex-direction: column;
    }

    .who-we-are-image {
        min-height: 300px;
    }

    /* Disable parallax on mobile */
    .why-us {
        background-attachment: scroll;
    }
}

/* ============================================
   Accessibility & Focus States
   ============================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}