/* ==========================================================================
   CSS Variables & Design System
   ========================================================================== */
   :root {
    /* Colors (Light White-Blue-LightBlue Theme - Strict & Modern) */
    --primary-color: #0d47a1; /* Deep strict blue */
    --primary-light: #1976d2;
    --secondary-color: #e3f2fd; /* Very light blue */
    --accent-color: #00b4d8; /* Bright light blue for highlights */
    
    --text-main: #1e293b; /* Dark slate for strictness */
    --text-muted: #64748b; /* Muted slate */
    --text-light: #f8fafc;
    
    --bg-main: #ffffff; /* Pure white */
    --bg-light: #f1f5f9; /* Light gray-blue for sections */
    --bg-footer: #0f172a; /* Very dark slate for strict footer */
    
    --border-color: #e2e8f0;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    
    /* Spacing & Layout */
    --container-max: 1200px;
    --section-padding: 100px 0;
    
    /* Transitions & Shadows */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-sm: 0 2px 4px rgba(13, 71, 161, 0.05);
    --shadow-md: 0 10px 25px rgba(13, 71, 161, 0.08);
    --shadow-lg: 0 20px 40px rgba(13, 71, 161, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.section {
    padding: var(--section-padding);
}

.bg-light {
    background-color: var(--bg-light);
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem auto;
    font-size: 1.1rem;
}

.divider {
    height: 4px;
    width: 60px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0 auto 1.5rem auto;
    border-radius: 2px;
}

.divider.left {
    margin: 0 0 1.5rem 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-light);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--text-light);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
    padding: 20px 0;
}

.header.scrolled {
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
}

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

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-main);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.btn-contact-nav {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 10px 24px;
    border-radius: 4px;
    font-weight: 600;
}

.btn-contact-nav::after {
    display: none;
}

.btn-contact-nav:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    padding: 180px 0 120px 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--bg-main) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(0,180,216,0.08) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.highlight {
    color: var(--primary-color);
    position: relative;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 650px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-main);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
    z-index: -1;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    background: var(--secondary-color);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    background: var(--primary-color);
    color: var(--text-light);
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-text {
    color: var(--text-muted);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.stats-container {
    display: flex;
    gap: 40px;
    margin-top: 3rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-text {
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(255,255,255,0.8);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.image-placeholder::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom right, rgba(255,255,255,0.2), rgba(255,255,255,0));
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--bg-footer);
    color: var(--text-light);
    padding: 80px 0 40px 0;
}

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

.footer-logo .logo-text {
    color: var(--text-light);
}

.footer-desc {
    color: #94a3b8;
    margin-top: 1.5rem;
    max-width: 300px;
}

.footer-title {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent-color);
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 1rem;
    color: #94a3b8;
}

.contact-list i {
    color: var(--accent-color);
    margin-top: 5px;
}

.contact-list a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #64748b;
    font-size: 0.9rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .hero-title { font-size: 3rem; }
    .about-container { grid-template-columns: 1fr; }
    .about-image { order: -1; margin-bottom: 2rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--bg-main);
        transition: var(--transition-normal);
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav-menu.active { left: 0; }
    
    .nav-list {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .hero { padding: 150px 0 80px 0; }
    .hero-title { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}