/* =============================================
   Tech Udyam Solutions Private Limited
   Corporate Website - Refined Professional Design
   ============================================= */

/* CSS Variables - Corporate Palette */
:root {
    /* Primary Colors - Deep Navy & Warm Amber */
    --navy-900: #0F172A;
    --navy-800: #1E293B;
    --navy-700: #334155;
    --navy-600: #475569;
    --navy-500: #64748B;
    --navy-400: #94A3B8;
    --navy-300: #CBD5E1;
    --navy-200: #E2E8F0;
    --navy-100: #F1F5F9;
    --navy-50: #F8FAFC;

    /* Accent - Warm Amber */
    --amber-500: #F59E0B;
    --amber-400: #FBBF24;
    --amber-600: #D97706;

    /* Semantic Colors */
    --primary: var(--navy-900);
    --primary-light: var(--navy-800);
    --accent: var(--amber-500);
    --accent-hover: var(--amber-600);

    /* Text */
    --text-primary: var(--navy-900);
    --text-secondary: var(--navy-600);
    --text-muted: var(--navy-500);
    --text-light: var(--navy-50);
    --text-inverse: #FFFFFF;

    /* Backgrounds */
    --bg-white: #FFFFFF;
    --bg-cream: #FEFDFB;
    --bg-light: var(--navy-50);
    --bg-subtle: var(--navy-100);
    --bg-dark: var(--navy-900);

    /* Borders */
    --border-light: var(--navy-200);
    --border-subtle: var(--navy-100);

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Typography Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-tight: 1.15;
    --leading-snug: 1.35;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.16);

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;

    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'DM Sans', sans-serif;
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.25rem, 5vw, var(--text-6xl));
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(1.875rem, 4vw, var(--text-5xl));
}

h3 {
    font-size: clamp(1.5rem, 3vw, var(--text-3xl));
}

h4 {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

p {
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* =============================================
   Navigation - Corporate Style
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-lg) 0;
    transition: all var(--duration-normal) var(--ease-out);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0);
    backdrop-filter: blur(0);
    transition: all var(--duration-normal) var(--ease-out);
}

.navbar.scrolled::before {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border-light);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

/* Logo */
.logo {
    font-family: 'DM Sans', sans-serif;
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-inverse);
    letter-spacing: -0.02em;
    transition: color var(--duration-fast) var(--ease-out);
}

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

/* Navigation Links */
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    align-items: center;
}

.nav-links a {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--space-sm) 0;
    position: relative;
    letter-spacing: 0.01em;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--duration-normal) var(--ease-out);
}

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

.nav-links a:hover,
.nav-links a.active {
    color: #FFFFFF;
}

.navbar.scrolled .nav-links a {
    color: var(--text-secondary);
}

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-inverse);
    border-radius: 1px;
    transition: all var(--duration-fast) var(--ease-out);
}

.navbar.scrolled .mobile-menu-btn span {
    background: var(--text-primary);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* =============================================
   Hero Section - Refined Corporate
   ============================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--navy-900);
    overflow: hidden;
    padding: var(--space-5xl) 0;
}

/* Subtle geometric background */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(135deg, transparent 40%, rgba(245, 158, 11, 0.03) 100%),
        radial-gradient(ellipse at 20% 50%, rgba(245, 158, 11, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(100, 116, 139, 0.1) 0%, transparent 40%);
}

/* Grid pattern overlay */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
}

.floating-shapes {
    display: none; /* Removed for cleaner corporate look */
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--container-padding);
}

.hero h1 {
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
    font-weight: var(--font-bold);
}

.hero h1 span {
    color: var(--accent);
    display: inline;
}

.hero p {
    font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
    color: var(--navy-400);
    margin-bottom: var(--space-2xl);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    line-height: var(--leading-relaxed);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    letter-spacing: 0.01em;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    min-height: 48px; /* Mobile touch target */
}

.btn-primary {
    background: var(--accent);
    color: var(--navy-900);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-inverse);
    border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-light);
}

.btn-outline:hover {
    background: var(--bg-light);
    border-color: var(--navy-300);
}

.btn-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* =============================================
   Section Styles
   ============================================= */
section {
    padding: var(--space-5xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.section-header span {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: var(--space-md);
}

.section-header h2 {
    margin-bottom: var(--space-lg);
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

/* =============================================
   Services Section
   ============================================= */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.service-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all var(--duration-normal) var(--ease-out);
    border: 1px solid var(--border-subtle);
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-normal) var(--ease-out);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--navy-100) 0%, var(--bg-white) 100%);
    border-radius: var(--radius-md);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--navy-700);
}

.service-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-sm);
}

.service-card p {
    font-size: var(--text-sm);
    margin-bottom: var(--space-lg);
    line-height: var(--leading-relaxed);
}

.service-card .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-xs);
    min-height: 40px;
}

/* =============================================
   Features / Why Choose Us
   ============================================= */
.features {
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy-900);
    border-radius: var(--radius-full);
    color: var(--accent);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: currentColor;
}

.feature-item h4 {
    margin-bottom: var(--space-sm);
}

.feature-item p {
    font-size: var(--text-sm);
}

/* =============================================
   Stats Section
   ============================================= */
.stats {
    background: var(--navy-900);
    padding: var(--space-4xl) 0;
    position: relative;
}

.stats::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(245, 158, 11, 0.06) 0%, transparent 50%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

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

.stat-item h3 {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
    color: var(--accent);
    margin-bottom: var(--space-xs);
    font-weight: var(--font-bold);
}

.stat-item p {
    color: var(--navy-400);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: var(--font-medium);
}

/* =============================================
   CTA Section
   ============================================= */
.cta {
    background: linear-gradient(135deg, var(--navy-800) 0%, var(--navy-900) 100%);
    padding: var(--space-5xl) 0;
    text-align: center;
    position: relative;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 100%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    color: var(--text-inverse);
    margin-bottom: var(--space-md);
}

.cta p {
    color: var(--navy-400);
    font-size: var(--text-lg);
    margin-bottom: var(--space-2xl);
}

/* =============================================
   Page Hero (Internal Pages)
   ============================================= */
.page-hero {
    padding: calc(var(--space-5xl) + 80px) 0 var(--space-4xl);
    background: var(--navy-900);
    text-align: center;
    position: relative;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(245, 158, 11, 0.06) 0%, transparent 50%);
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    color: var(--text-inverse);
    margin-bottom: var(--space-md);
}

.page-hero p {
    color: var(--navy-400);
    font-size: var(--text-xl);
    max-width: 560px;
    margin: 0 auto;
}

/* =============================================
   About Page
   ============================================= */
.about-content {
    padding: var(--space-5xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--space-lg);
}

.about-text h3 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
    font-size: var(--text-2xl);
}

.about-text p {
    margin-bottom: var(--space-md);
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--navy-100) 0%, var(--navy-50) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-light);
}

.about-image-placeholder svg {
    width: 80px;
    height: 80px;
    stroke: var(--navy-400);
}

/* Values Section */
.values {
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.value-card {
    background: var(--bg-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out);
    border: 1px solid var(--border-subtle);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.value-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy-900);
    border-radius: var(--radius-full);
    color: var(--accent);
}

.value-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

.value-card h4 {
    margin-bottom: var(--space-sm);
}

.value-card p {
    font-size: var(--text-sm);
}

/* =============================================
   Services Page
   ============================================= */
.service-detail {
    padding: var(--space-5xl) 0;
}

.service-detail:nth-child(even) {
    background: var(--bg-light);
}

.service-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.service-detail:nth-child(even) .service-detail-grid {
    direction: rtl;
}

.service-detail:nth-child(even) .service-detail-grid > * {
    direction: ltr;
}

.service-detail-content h2 {
    margin-bottom: var(--space-md);
}

.service-detail-content p {
    margin-bottom: var(--space-lg);
}

.service-features {
    list-style: none;
    margin-bottom: var(--space-xl);
}

.service-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-size: var(--text-sm);
}

.service-features li svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.service-detail-image {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--navy-100) 0%, var(--navy-50) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-light);
}

.service-detail-image svg {
    width: 80px;
    height: 80px;
    stroke: var(--navy-400);
}

/* =============================================
   Contact Page
   ============================================= */
.contact-section {
    padding: var(--space-5xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-4xl);
}

.contact-info h2 {
    margin-bottom: var(--space-md);
}

.contact-info > p {
    margin-bottom: var(--space-2xl);
}

.contact-details {
    margin-bottom: var(--space-2xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-item-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--navy-700);
}

.contact-item-content h4 {
    font-size: var(--text-sm);
    margin-bottom: var(--space-xs);
}

.contact-item-content p {
    margin-bottom: 0;
    font-size: var(--text-sm);
}

.contact-item-content a {
    color: var(--navy-700);
}

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

/* Social Links */
.social-links {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    color: var(--navy-600);
    transition: all var(--duration-fast) var(--ease-out);
}

.social-link:hover {
    background: var(--navy-900);
    color: var(--accent);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
}

.contact-form-wrapper h3 {
    margin-bottom: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    font-family: inherit;
    font-size: var(--text-base);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out);
    background: var(--bg-white);
    min-height: 48px; /* Touch target */
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--navy-400);
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--navy-400);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.contact-form .btn {
    width: 100%;
}

.form-status {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: var(--text-sm);
    display: none;
}

.form-status.success {
    display: block;
    background: #ECFDF5;
    color: #047857;
    border: 1px solid #A7F3D0;
}

.form-status.error {
    display: block;
    background: #FEF2F2;
    color: #B91C1C;
    border: 1px solid #FECACA;
}

/* =============================================
   Footer - Corporate with Legal Info
   ============================================= */
.footer {
    background: var(--navy-900);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand .logo {
    color: var(--text-inverse);
    margin-bottom: var(--space-md);
    display: inline-block;
}

.footer-brand > p {
    color: var(--navy-400);
    font-size: var(--text-sm);
    margin-bottom: var(--space-lg);
    max-width: 280px;
    line-height: var(--leading-relaxed);
}

.footer-brand .social-links {
    margin-bottom: var(--space-lg);
}

.footer-brand .social-link {
    background: rgba(255, 255, 255, 0.08);
    color: var(--navy-400);
}

.footer-brand .social-link:hover {
    background: var(--accent);
    color: var(--navy-900);
}

.footer-title {
    color: var(--text-inverse);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-lg);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
    color: var(--navy-400);
    font-size: var(--text-sm);
}

.footer-links a {
    color: var(--navy-400);
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-links a:hover {
    color: var(--text-inverse);
}

/* Corporate Legal Info Section */
.footer-legal {
    padding: var(--space-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-xl);
}

.footer-legal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.footer-legal-item {
    text-align: center;
}

.footer-legal-item span {
    display: block;
    font-size: var(--text-xs);
    color: var(--navy-500);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xs);
}

.footer-legal-item strong {
    display: block;
    color: var(--navy-300);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: var(--navy-500);
    font-size: var(--text-xs);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-bottom-links a {
    color: var(--navy-500);
    font-size: var(--text-xs);
}

.footer-bottom-links a:hover {
    color: var(--navy-300);
}

/* =============================================
   Animations
   ============================================= */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.1s; }
.stagger-3 { transition-delay: 0.15s; }
.stagger-4 { transition-delay: 0.2s; }

/* =============================================
   Responsive - Mobile First Approach
   ============================================= */

/* Tablet (768px and below) */
@media (max-width: 1024px) {
    :root {
        --container-padding: 1.25rem;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2xl) var(--space-lg);
    }

    .about-grid,
    .service-detail-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .service-detail:nth-child(even) .service-detail-grid {
        direction: ltr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-2xl);
    }

    .footer-legal-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

    /* Navigation */
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--navy-900);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 0;
        padding: var(--space-xl);
        z-index: 999;
    }

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

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: var(--space-lg);
        font-size: var(--text-xl);
        color: var(--text-inverse);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links a::after {
        display: none;
    }

    .nav-links li:last-child a {
        border-bottom: none;
    }

    .mobile-menu-btn {
        display: flex;
        z-index: 1001;
    }

    .mobile-menu-btn.active span {
        background: var(--text-inverse);
    }

    /* Hero */
    .hero {
        min-height: auto;
        padding: calc(var(--space-5xl) + 60px) 0 var(--space-4xl);
    }

    .btn-group {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    /* Sections */
    section {
        padding: var(--space-3xl) 0;
    }

    .section-header {
        margin-bottom: var(--space-2xl);
    }

    .services-grid,
    .features-grid,
    .values-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .service-card,
    .value-card {
        padding: var(--space-xl);
    }

    /* Page Hero */
    .page-hero {
        padding: calc(var(--space-4xl) + 60px) 0 var(--space-2xl);
    }

    /* Contact */
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .contact-form-wrapper {
        padding: var(--space-xl);
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }

    .footer-brand > p {
        max-width: none;
    }

    .footer-brand .social-links {
        justify-content: center;
    }

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

    .footer-bottom-links {
        justify-content: center;
    }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
    h1 {
        font-size: var(--text-3xl);
    }

    h2 {
        font-size: var(--text-2xl);
    }

    .stat-item h3 {
        font-size: var(--text-3xl);
    }

    .hero p {
        font-size: var(--text-base);
    }
}

/* =============================================
   Utility Classes
   ============================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--navy-900);
    color: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
    z-index: 998;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    background: var(--navy-800);
}