/* ==========================================================================
   1. BASE - Fonts, Reset, Variables, Base Styles
   ========================================================================== */

/* 1.1 Font Imports */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@500;700&family=Roboto:wght@400;500;700&display=swap');

/* 1.2 Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* 1.3 CSS Variables */
:root {
    --color-primary: #00FF7F; /* Electric Green */
    --color-primary-dark: #00e673;
    --color-bg: #111111;
    --color-bg-card: #1A1A1A;
    --color-border: #2A2A2A;
    --color-text: #E0E0E0;
    --color-text-muted: #888888;
    --color-white: #ffffff;
    
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Roboto', sans-serif;

    --transition: 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
    --border-radius: 4px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
}

/* 1.4 Base Styles */
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-muted);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.2;
    text-transform: uppercase;
}
h1 { font-size: clamp(3rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 5vw, 3rem); }
h3 { font-size: 1.5rem; }
p { margin-bottom: var(--spacing-sm); }
a { text-decoration: none; color: var(--color-primary); transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
::selection { background-color: var(--color-primary); color: var(--color-bg); }

/* ==========================================================================
   2. LAYOUT & HELPERS
   ========================================================================== */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
section { padding: var(--spacing-xxl) 0; position: relative; }
.section-header { text-align: center; margin-bottom: var(--spacing-xl); }
.section-title { margin-bottom: var(--spacing-xs); }
.section-subtitle { max-width: 600px; margin: 0 auto; font-size: 1.1rem; }
.site-background { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; }
#particle-canvas { width: 100%; height: 100%; }

/* ==========================================================================
   3. COMPONENTS
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-family: var(--font-heading);
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: center;
    border: 2px solid;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}
.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 255, 127, 0.1);
}
.btn-secondary {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}
.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-3px);
}
.btn-block { display: block; width: 100%; }

/* ==========================================================================
   4. HEADER & NAVIGATION
   ========================================================================== */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: background-color 0.4s ease, border-bottom 0.4s ease, padding 0.4s ease;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid transparent;
}
#main-header.scrolled {
    background-color: rgba(17, 17, 17, 0.85);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border);
}
.navbar { display: flex; justify-content: space-between; align-items: center; height: 60px; }
.nav-logo img { height: 65px; filter: brightness(1) invert(1); }
.nav-menu { display: flex; align-items: center; gap: var(--spacing-lg); }
.nav-link { color: var(--color-text); font-weight: 500; position: relative; padding: 5px 0; }
.nav-link.active, .nav-link:hover { color: var(--color-primary); }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); transform-origin: left; }
.header-cta { margin-left: var(--spacing-lg); }
.hamburger { display: none; cursor: pointer; }
.bar { display: block; width: 25px; height: 2px; margin: 6px auto; transition: all 0.3s ease-in-out; background-color: var(--color-text); }

/* ==========================================================================
   5. FOOTER
   ========================================================================== */
#main-footer {
    background-color: #0D0D0D;
    padding-top: var(--spacing-xxl);
    border-top: 1px solid var(--color-border);
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-xl);
}
.footer-col h4 { color: var(--color-white); margin-bottom: var(--spacing-sm); font-size: 1.1rem; }
.footer-col ul li { margin-bottom: var(--spacing-xs); }
.footer-logo img { height: 60px; margin-bottom: var(--spacing-sm); filter: brightness(1) invert(1); }
.newsletter-form { display: flex; margin-top: var(--spacing-sm); }
.newsletter-form input {
    flex-grow: 1;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.5rem;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    outline: none;
}
.newsletter-form button {
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    color: var(--color-bg);
    font-size: 1.5rem;
    padding: 0 0.75rem;
    cursor: pointer;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}
.footer-bottom { border-top: 1px solid var(--color-border); padding: var(--spacing-md) 0; display: flex; justify-content: space-between; align-items: center; font-size: 0.9rem; }
.footer-legal-links { display: flex; gap: var(--spacing-md); }
.footer-legal-links a { color: var(--color-text-muted); }

/* ==========================================================================
   6. PAGE-SPECIFIC STYLES
   ========================================================================== */
   
/* 6.1 Hero Section */
.hero { display: flex; align-items: center; min-height: 90vh; text-align: left; }
.hero-content { max-width: 800px; }
.hero-tagline { color: var(--color-text-muted); font-weight: 500; letter-spacing: 2px; }
.hero-title .highlight { color: var(--color-primary); }
.cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background-color: var(--color-primary);
    margin-left: 5px;
    animation: blink 1s infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-subtitle { font-size: 1.25rem; margin: var(--spacing-md) 0 var(--spacing-lg); max-width: 600px; }
.hero-buttons { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; }

/* 6.2 Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}
.service-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
}
.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius);
    padding: 1px;
    background: conic-gradient(from 180deg at 50% 50%, rgba(0, 255, 127, 0.5) 0deg, rgba(0,0,0,0) 360deg);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition);
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.service-card:hover::before { opacity: 1; }
.service-icon { margin-bottom: var(--spacing-sm); }
.service-icon svg { width: 40px; height: 40px; fill: var(--color-primary); }
.service-card h3 { margin-bottom: var(--spacing-xs); }

/* 6.3 Industry Focus Section */
.industry-section { background-color: var(--color-bg-card); }
.industry-focus-container {
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    overflow: hidden;
}
.industry-tabs {
    display: flex;
    background-color: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}
.industry-tab {
    flex-grow: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 1rem;
    cursor: pointer;
    transition: color var(--transition), background-color var(--transition);
    position: relative;
}
.industry-tab.active { color: var(--color-primary); }
.industry-tab::after {
    content: '';
    position: absolute;
    bottom: -1px; left: 0;
    width: 100%; height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}
.industry-tab.active::after { transform: scaleX(1); }
.industry-content-container { padding: var(--spacing-lg); }
.industry-content { display: none; }
.industry-content.active { display: block; animation: fadeIn 0.5s; }
.industry-content h3 { color: var(--color-primary); }
.industry-content ul { list-style: '✓ '; padding-left: 1.2rem; margin-top: var(--spacing-sm); }
.industry-content li { margin-bottom: var(--spacing-xs); padding-left: 0.5rem; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* 6.4 Approach Section */
.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}
.approach-step {
    display: flex;
    gap: var(--spacing-md);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}
.step-number {
    font-size: 3rem;
    font-family: var(--font-heading);
    color: var(--color-border);
    line-height: 1;
}
.step-content h3 { font-size: 1.25rem; }

/* 6.5 Testimonials Section */
.testimonial-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    align-items: center;
    gap: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg));
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}
.testimonial-quote {
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.5;
    color: var(--color-text);
    border-left: 3px solid var(--color-primary);
    padding-left: var(--spacing-md);
}
.testimonial-author { margin-top: var(--spacing-md); }
.author-name { display: block; font-weight: 700; color: var(--color-text); }
.author-title { font-size: 0.9rem; }
.testimonial-image-wrapper img {
    width: 150px; height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-primary);
    margin: 0 auto;
}

/* 6.6 CTA Section */
.cta-section { background-color: var(--color-bg-card); }
.cta-content { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-content h2 { font-size: 2.5rem; }
.cta-content p { margin: var(--spacing-sm) 0 var(--spacing-md); }

/* 6.7 Contact & Legal Pages */
.page-header { padding: 180px 0 100px 0; text-align: center; }
.page-title { margin-bottom: var(--spacing-sm); }
.contact-section { padding-bottom: var(--spacing-xxl); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    background-color: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
}
.contact-info ul { margin-top: var(--spacing-sm); }
.contact-info li { margin-bottom: var(--spacing-xs); }
.contact-form .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: 0.75rem 1rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font-family: var(--font-body);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}
.legal-content { padding: var(--spacing-xxl) 0; }
.legal-content .container { max-width: 800px; }
.legal-content h2 { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-sm); font-size: 2rem; }
.legal-content ul { list-style-type: disc; padding-left: 20px; }

/* ==========================================================================
   7. ANIMATIONS
   ========================================================================== */
.animate-on-scroll { opacity: 0; transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-on-scroll[data-animation="fade-in-up"] { transform: translateY(30px); }
.animate-on-scroll[data-animation="zoom-in"] { transform: scale(0.95); }
.animate-on-scroll.is-visible { opacity: 1; transform: translate(0, 0) scale(1); }

/* ==========================================================================
   8. RESPONSIVENESS
   ========================================================================== */
@media (max-width: 992px) {
    .testimonial-container { grid-template-columns: 1fr; text-align: center; }
    .testimonial-quote { border-left: none; border-top: 3px solid var(--color-primary); padding-left: 0; padding-top: var(--spacing-md); }
    .testimonial-image-wrapper { order: -1; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    /* Mobile Navigation */
    .nav-menu {
        position: fixed;
        right: -100%;
        top: 0;
        flex-direction: column;
        justify-content: center;
        background-color: var(--color-bg);
        width: 100%;
        height: 100vh;
        text-align: center;
        transition: 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
        gap: var(--spacing-lg);
    }
    .nav-menu.active { right: 0; }
    .nav-link { font-size: 1.5rem; }
    .header-cta { display: none; }
    .hamburger { display: block; z-index: 1001; }
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .hero { text-align: center; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    .industry-tabs { flex-direction: column; }
    .footer-bottom { flex-direction: column; gap: var(--spacing-sm); }
}