/* ============================================
   AI5 Consulting - Main Stylesheet
   Color Palette: Professional Dark Blues
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors */
    --color-bg-dark: #0a1628;
    --color-bg-mid: #0f2039;
    --color-bg-section: #142744;
    --color-primary: #1e3a5f;
    --color-accent: #2d6cb5;
    --color-accent-bright: #4a9eff;
    --color-accent-light: #6bb8ff;
    
    /* Secondary Accent (Gold) */
    --color-gold: #d4a84b;
    --color-gold-light: #f0c565;
    
    /* Text Colors */
    --color-text-light: #e8f4ff;
    --color-text-muted: #a8c4e0;
    --color-text-white: #ffffff;
    
    /* Utility */
    --color-border: rgba(77, 144, 217, 0.2);
    --color-overlay: rgba(10, 22, 40, 0.9);
    
    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
    --font-accent: 'Outfit', 'Helvetica Neue', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(74, 158, 255, 0.15);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-white);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
    font-family: var(--font-accent);
    font-weight: 500;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.accent-text {
    color: var(--color-accent-bright);
}

.gold-text {
    color: var(--color-gold);
}

/* ============================================
   Links & Buttons
   ============================================ */
a {
    color: var(--color-accent-bright);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-family: var(--font-accent);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-smooth);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-bright) 100%);
    color: var(--color-text-white);
    box-shadow: 0 4px 15px rgba(74, 158, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(74, 158, 255, 0.4);
    color: var(--color-text-white);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-white);
    border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-text-white);
}

.btn-gold {
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-light) 100%);
    color: var(--color-bg-dark);
}

.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(212, 168, 75, 0.4);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: var(--color-overlay);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-smooth);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(10, 22, 40, 0.98);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo img {
    height: 50px;
    width: auto;
}

.nav-logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-white);
}

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

.nav-link {
    font-family: var(--font-accent);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav-link:hover {
    color: var(--color-accent-bright);
}

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

.nav-link.active {
    color: var(--color-accent-bright);
}

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

.nav-cta {
    margin-left: 1rem;
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-text-white);
    transition: all var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-mid) 50%, var(--color-primary) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(45, 108, 181, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(74, 158, 255, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-tagline {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-gold);
    border-radius: 2px;
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

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

.hero .lead {
    max-width: 540px;
    margin-bottom: var(--spacing-md);
}

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

.hero-image {
    position: relative;
    animation: fadeIn 1.2s ease-out 0.3s both;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: var(--shadow-glow), var(--shadow-soft);
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent);
    border-radius: 8px;
    z-index: -1;
}

/* ============================================
   Sections - General
   ============================================ */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

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

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

.section-gradient {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-mid) 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.container-narrow {
    max-width: 900px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent-bright);
    margin-bottom: var(--spacing-sm);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header .lead {
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   Stats Section
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(30, 58, 95, 0.3);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-accent-bright);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-family: var(--font-accent);
    font-size: 1rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   Problem Section
   ============================================ */
.problem-highlight {
    background: linear-gradient(135deg, var(--color-bg-section) 0%, var(--color-primary) 100%);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
}

.problem-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.problem-stat-number {
    font-family: var(--font-heading);
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
}

.problem-stat-text h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.reasons-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.reason-card {
    padding: var(--spacing-md);
    background: rgba(10, 22, 40, 0.5);
    border-radius: 8px;
    border-left: 3px solid var(--color-accent);
}

.reason-card h4 {
    color: var(--color-accent-bright);
    margin-bottom: 0.75rem;
}

.reason-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* ============================================
   Services Section
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.4) 0%, rgba(20, 39, 68, 0.6) 100%);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.service-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-color: var(--color-accent);
}

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 158, 255, 0.15);
    border-radius: 8px;
    margin-bottom: var(--spacing-sm);
}

.service-icon svg {
    width: 30px;
    height: 30px;
    stroke: var(--color-accent-bright);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.service-card ul {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.service-card li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.service-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-bright);
}

/* ============================================
   About Section
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-soft);
}

.about-image::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: -15px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-gold);
    border-radius: 8px;
    z-index: -1;
}

.about-content h2 {
    margin-bottom: var(--spacing-sm);
}

.about-content .lead {
    margin-bottom: var(--spacing-md);
}

.credentials-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.credential-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(30, 58, 95, 0.3);
    border-radius: 4px;
    border-left: 3px solid var(--color-accent);
}

.credential-item svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-accent-bright);
    flex-shrink: 0;
}

.credential-item span {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* ============================================
   What to Expect Section
   ============================================ */
.expect-timeline {
    position: relative;
    padding-left: 3rem;
}

.expect-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-gold) 100%);
}

.expect-item {
    position: relative;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.expect-item:last-child {
    padding-bottom: 0;
    margin-bottom: 0;
}

.expect-item::before {
    content: '';
    position: absolute;
    left: calc(-3rem + 1px);
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--color-bg-dark);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    transform: translateX(-50%);
}

.expect-number {
    font-family: var(--font-accent);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
}

.expect-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.expect-item p {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* ============================================
   Training Section
   ============================================ */
.training-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.training-feature {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(30, 58, 95, 0.3);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: all var(--transition-smooth);
}

.training-feature:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.training-feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-bright) 100%);
    border-radius: 50%;
}

.training-feature-icon svg {
    width: 35px;
    height: 35px;
    stroke: var(--color-text-white);
}

.training-feature h4 {
    margin-bottom: 0.5rem;
}

.training-feature p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.training-cta {
    text-align: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-section) 100%);
    border-radius: 12px;
    border: 1px solid var(--color-accent);
}

.training-cta h3 {
    margin-bottom: var(--spacing-sm);
}

.training-cta p {
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-muted);
}

/* ============================================
   Contact Form
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info {
    padding: var(--spacing-md);
}

.contact-info h2 {
    margin-bottom: var(--spacing-sm);
}

.contact-info .lead {
    margin-bottom: var(--spacing-md);
}

.contact-details {
    margin-bottom: var(--spacing-md);
}

.contact-detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-detail-item svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent-bright);
    flex-shrink: 0;
}

.contact-detail-item span {
    color: var(--color-text-light);
}

.contact-form-wrapper {
    padding: var(--spacing-md);
    background: rgba(30, 58, 95, 0.3);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-accent);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.form-group label .required {
    color: var(--color-gold);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    background: rgba(10, 22, 40, 0.6);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-white);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-bright);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.2);
}

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

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-submit {
    margin-top: var(--spacing-sm);
}

.form-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

/* ============================================
   Thank You Page
   ============================================ */
.thank-you-content {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.thank-you-box {
    max-width: 600px;
    padding: var(--spacing-lg);
    background: rgba(30, 58, 95, 0.3);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.thank-you-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-bright) 100%);
    border-radius: 50%;
}

.thank-you-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--color-text-white);
}

.thank-you-box h1 {
    margin-bottom: var(--spacing-sm);
}

.thank-you-box p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: var(--spacing-sm);
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-logo-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-white);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.footer-nav h4 {
    color: var(--color-text-white);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 0.5rem;
}

.footer-nav a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ============================================
   Logo Placeholders
   ============================================ */
.logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 58, 95, 0.3);
    border: 1px dashed var(--color-border);
    border-radius: 8px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-align: center;
}

.cert-logos {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.cert-logo-placeholder {
    width: 120px;
    height: 60px;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design - Tablet
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 2;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .hero .lead {
        margin: 0 auto var(--spacing-md);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .reasons-list {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card.featured {
        grid-column: span 1;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-image {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .credentials-list {
        grid-template-columns: 1fr;
    }
    
    .training-features {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: span 2;
        max-width: none;
        text-align: center;
    }
}

/* ============================================
   Responsive Design - Mobile
   ============================================ */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg-dark);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transform: translateX(100%);
        transition: transform var(--transition-smooth);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .nav-cta {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .problem-stat {
        flex-direction: column;
        text-align: center;
    }
    
    .problem-stat-number {
        font-size: 4rem;
    }
    
    .expect-timeline {
        padding-left: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
}