/* ==========================================================================
   CSS Variables & Tokens
   ========================================================================== */
:root {
    /* Color Palette - Premium Corporate */
    --color-primary: #0F172A; /* Deep Blue Slate */
    --color-primary-light: #1E293B;
    --color-secondary: #3B82F6; /* Bright Action Blue */
    --color-secondary-hover: #2563EB;
    --color-accent: #0EA5E9; /* Light Blue Accent */
    
    --color-text-main: #334155;
    --color-text-light: #64748B;
    --color-text-inverse: #F8FAFC;
    
    --color-bg-main: #FFFFFF;
    --color-bg-alt: #F1F5F9;
    --color-bg-glass: rgba(255, 255, 255, 0.85);
    
    /* Typography */
    --font-primary: 'Google Sans', system-ui, -apple-system, sans-serif;
    --font-heading: 'Google Sans', system-ui, -apple-system, sans-serif;
    
    /* Layout & Spacing */
    --container-max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions & Shadows */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.05), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

a:hover {
    color: var(--color-secondary-hover);
}

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

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

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

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

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

.mt-4 { margin-top: var(--spacing-md); }

/* ==========================================================================
   Typography Utilities
   ========================================================================== */
.section-title {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.title-underline {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    margin: 0 auto var(--spacing-lg);
    border-radius: 2px;
}

.title-underline.left {
    margin-left: 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all var(--transition-medium);
    cursor: pointer;
    text-align: center;
    border: 2px solid transparent;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-secondary-hover), var(--color-secondary));
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-inverse);
    border-color: var(--color-text-inverse);
}

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

/* ==========================================================================
   Header & Navigation (Glassmorphism)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: all var(--transition-medium);
    background: transparent;
}

.header.scrolled {
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    letter-spacing: -0.05em;
}

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

.logo span {
    font-weight: 300;
    color: var(--color-accent);
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-inverse);
    font-weight: 500;
    position: relative;
}

.header.scrolled .nav-link:not(.btn-primary) {
    color: var(--color-text-main);
}

.nav-link:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-medium);
}

.nav-link:not(.btn-primary):hover::after {
    width: 100%;
}

.header.scrolled .nav-link:not(.btn-primary):hover {
    color: var(--color-secondary);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: var(--color-text-inverse);
}

.header.scrolled .mobile-menu-btn .bar {
    background-color: var(--color-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px; /* Offset for fixed header */
    color: var(--color-text-inverse);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../assets/hero_background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.6));
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    text-align: left;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-inverse);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.2s;
    animation-fill-mode: both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease-out 0.4s;
    animation-fill-mode: both;
}

/* ==========================================================================
   Services Grid
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: var(--spacing-lg);
}

.service-card {
    background: var(--color-bg-main);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
    border: 1px solid rgba(15, 23, 42, 0.05);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--color-bg-alt);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--color-secondary);
    transition: all var(--transition-medium);
}

.service-card:hover .service-icon {
    background: var(--color-secondary);
    color: var(--color-text-inverse);
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.service-sub {
    font-size: 1.05rem;
    color: var(--color-primary);
    margin: 1rem 0 0.5rem;
    font-weight: 600;
}

.service-list {
    list-style-type: disc;
    padding-left: 1.2rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

.service-list li {
    margin-bottom: 0.4rem;
}

/* ==========================================================================
   About / Mission Section
   ========================================================================== */
.about-container {
    display: block;
    padding: 2rem 0;
}

.about-text {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
}

.about-image-container {
    position: relative;
}

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

.about-image-placeholder::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.about-image-placeholder:hover::after {
    opacity: 1;
}

/* ==========================================================================
   Contact Section & Form
   ========================================================================== */
.contact {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-text-inverse);
}

.contact .section-title {
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-xs);
}

.contact-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.contact-form-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background: var(--color-bg-main);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: left;
    color: var(--color-text-main);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #E2E8F0;
    border-radius: 6px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: #F8FAFC;
    color: var(--color-text-main);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: var(--color-bg-main);
}

.form-compliance-group {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--color-text-main);
}

.form-compliance-group input[type="checkbox"] {
    margin-top: 0.25rem;
    cursor: pointer;
}

.form-compliance-group a {
    color: var(--color-primary);
    text-decoration: underline;
}

.btn-block {
    width: 100%;
    display: block;
}

.form-result {
    margin-top: 1rem;
    font-weight: 500;
    min-height: 24px;
}

.form-result.success {
    color: #10B981;
}

.form-result.error {
    color: #EF4444;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.7);
    padding-top: var(--spacing-xl);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    color: var(--color-text-inverse);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.footer-logo span {
    color: var(--color-accent);
    font-weight: 300;
}

.footer-desc {
    max-width: 400px;
}

.footer-contact h3 {
    color: var(--color-text-inverse);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.footer-address p {
    margin-bottom: 0.5rem;
}

.footer-address a {
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.875rem;
}

/* ==========================================================================
   Animations & Reveals
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

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

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

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--color-bg-glass);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 6rem 2rem;
        transition: right var(--transition-medium);
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
    }

    .nav-link, .header.scrolled .nav-link {
        color: var(--color-primary);
        font-size: 1.25rem;
    }
    
    .nav-link.btn-primary {
        color: var(--color-text-inverse) !important;
    }

    .mobile-menu-btn.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
        background-color: var(--color-primary);
    }

    .mobile-menu-btn.active .bar:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
        background-color: var(--color-primary);
    }

    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
}