/* ===================================
   Variables & Custom Properties
   =================================== */
:root {
    /* Palette de couleurs */
    --color-primary: #0A2540;        /* Bleu profond - confiance */
    --color-accent: #00D9FF;          /* Turquoise vif - tech */
    --color-light: #F8F9FA;           /* Gris très clair */
    --color-white: #FFFFFF;
    --color-dark: #212529;
    --color-muted: #6C757D;
    
    /* Typographie */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing uniforme */
    --spacing-section: 5rem;
    --spacing-section-mobile: 3rem;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   Base Typography
   =================================== */
body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6,
.navbar-brand,
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* Hiérarchie titres */
h1, .display-3 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2, .display-5 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p { line-height: 1.8; }
.lead { line-height: 1.7; }

/* ===================================
   Bootstrap Button Overrides + Focus States
   =================================== */
.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    font-family: var(--font-heading);
    transition: var(--transition-smooth);
}

.btn-primary:hover,
.btn-primary:active {
    background-color: #041729;
    border-color: #041729;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(10, 37, 64, 0.3);
}

.btn-primary:focus-visible {
    outline: 3px solid rgba(10, 37, 64, 0.4);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(10, 37, 64, 0.1);
}

.btn-accent {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-dark);
    font-weight: 600;
    font-family: var(--font-heading);
    transition: var(--transition-smooth);
}

.btn-accent:hover,
.btn-accent:active {
    background-color: #00B8D9;
    border-color: #00B8D9;
    color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 217, 255, 0.4);
}

.btn-accent:focus-visible {
    outline: 3px solid rgba(0, 217, 255, 0.5);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.15);
}

.btn-success {
    background-color: #10B981;
    border-color: #10B981;
    transition: var(--transition-smooth);
}

.btn-success:hover,
.btn-success:focus,
.btn-success:active {
    background-color: #059669;
    border-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(16, 185, 129, 0.2);
}

.btn-secondary {
    background-color: var(--color-muted);
    border-color: var(--color-muted);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-heading);
    color: var(--color-white);
    transition: var(--transition-smooth);
    box-shadow: 0 4px 8px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover,
.btn-secondary:active {
    background-color: #5A6268;
    border-color: #5A6268;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(108, 117, 125, 0.4);
}

.btn-secondary:focus-visible {
    outline: 3px solid rgba(108, 117, 125, 0.4);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(108, 117, 125, 0.1);
}

.btn-outline-secondary {
    border-color: var(--color-muted);
    color: var(--color-muted);
    transition: var(--transition-smooth);
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus,
.btn-outline-secondary:active {
    background-color: var(--color-muted);
    border-color: var(--color-muted);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-outline-primary {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transition: var(--transition-smooth);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

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

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

.bg-primary {
    background-color: var(--color-primary) !important;
}

.bg-accent-light {
    background: rgba(0, 217, 255, 0.08) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-left: 4px solid var(--color-accent);
    border: 1px solid rgba(0, 217, 255, 0.2);
    box-shadow: 0 4px 16px rgba(0, 217, 255, 0.1);
}

/* ===================================
   Global Styles
   =================================== */
html {
    scroll-behavior: smooth;
}

/* Désactiver animations pour utilisateurs sensibles */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

section {
    scroll-margin-top: 80px;
    padding: var(--spacing-section) 0;
}

@media (max-width: 768px) {
    section {
        padding: var(--spacing-section-mobile) 0;
    }
}

/* ===================================
   Navbar
   =================================== */
.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    transition: var(--transition-smooth);
    background-color: rgba(10, 37, 64, 0.95) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar.shadow-lg {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    letter-spacing: -0.5px;
    background-color: white;
    padding: 6px 12px;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.navbar-brand:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 217, 255, 0.3);
}

.navbar-logo {
    height: 40px;
    width: auto;
    transition: var(--transition-smooth);
}

.navbar-brand span {
    color: var(--color-primary);
}

.nav-link {
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 1rem !important;
}

.nav-link:focus {
    outline: none;
    box-shadow: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 60%;
}

@media (max-width: 991px) {
    .navbar-collapse {
        padding: 1rem 0;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .navbar-logo {
        height: 32px;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
        padding: 5px 10px;
    }
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    min-height: 100vh;
    background: linear-gradient(180deg, #E3F2FD 0%, #F8F9FA 50%, #FFFFFF 100%);
    color: var(--color-dark);
    position: relative;
    overflow: hidden;
}

/* Animated Grid Pattern Background */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    pointer-events: none;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

/* Radial Gradient Overlay */
.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 217, 255, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(10, 37, 64, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.5);
    color: var(--color-primary);
    font-weight: 800;
    margin-bottom: 2rem;
}

.hero-section .text-accent {
    color: var(--color-accent);
    font-weight: 700;
}

/* Hero CTA mis en valeur */
.hero-section .btn-accent {
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.3);
    animation: subtlePulse 3s ease-in-out infinite;
}

@keyframes subtlePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.hero-section .btn-accent:hover {
    box-shadow: 0 12px 32px rgba(0, 217, 255, 0.5);
    animation: none;
}

.hero-section .lead {
    font-size: 1.1rem;
    color: var(--color-muted);
}

/* Service Tiles in Hero */
.service-tile {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    padding: 2rem 1rem;
    height: 100%;
    transition: var(--transition-smooth);
    cursor: default;
}

.service-tile:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.2);
}

.service-tile i {
    font-size: 2.5rem;
    color: var(--color-accent);
    display: block;
    transition: var(--transition-smooth);
}

.service-tile:hover i {
    transform: scale(1.1);
    color: var(--color-white);
}

.service-tile h3 {
    color: var(--color-white);
    margin-bottom: 0;
    font-size: 1rem;
    line-height: 1.3;
}

@media (max-width: 768px) {
    .hero-section {
        min-height: 90vh;
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
    
    .hero-section h1 {
        font-size: 2rem;
        line-height: 1.3;
        margin-bottom: 1.5rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .hero-section .btn-accent {
        font-size: 1rem;
        padding: 0.875rem 2rem;
    }
    
    .service-tile {
        padding: 1.5rem 0.75rem;
    }
    
    .service-tile i {
        font-size: 2rem;
    }
    
    .service-tile h3 {
        font-size: 0.875rem;
    }
}

/* ===================================
   Sections
   =================================== */
section {
    padding: 5rem 0;
}

@media (max-width: 768px) {
    section {
        padding: 3rem 0;
    }
}

/* ===================================
   Service Cards (Section Services) - Smooth Reveal Effect
   =================================== */
.service-card-hover {
    position: relative;
    height: 100%;
    min-height: 280px;
    background: var(--color-white);
    border: 2px solid rgba(10, 37, 64, 0.1);
    border-radius: 1rem;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card-hover:hover {
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(10, 37, 64, 0.15);
}

/* Face avant - État initial */
.service-card-front {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-white);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
}

.service-card-hover:hover .service-card-front {
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
}

.service-card-front i {
    font-size: 3.5rem;
    color: var(--color-primary);
    display: block;
    margin-bottom: 1rem;
    transition: all 0.5s ease;
}

.service-card-hover:hover .service-card-front i {
    transform: scale(0.8);
    opacity: 0;
}

.service-card-front h3 {
    color: var(--color-primary);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
    transition: all 0.5s ease;
}

.service-card-hover:hover .service-card-front h3 {
    transform: translateY(-10px);
    opacity: 0;
}

/* Face arrière - Contenu révélé au hover */
.service-card-back {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 1;
}

.service-card-back-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0D3D5F 100%);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-shrink: 0;
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transition-delay: 0.1s;
}

.service-card-hover:hover .service-card-back-header {
    opacity: 1;
    transform: translateY(0);
}

.service-card-back-header i {
    font-size: 2rem;
    color: var(--color-accent);
}

.service-card-back-header h4 {
    color: var(--color-white);
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
}

.service-card-back-content {
    padding: 1.5rem;
    flex-grow: 1;
    overflow-y: auto;
    max-height: 0;
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transition-delay: 0.2s;
}

.service-card-hover:hover .service-card-back-content {
    max-height: 500px;
    opacity: 1;
}

.service-card-back-content p {
    color: var(--color-dark);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 1rem;
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.5s ease;
    transition-delay: 0.3s;
}

.service-card-hover:hover .service-card-back-content p {
    transform: translateY(0);
    opacity: 1;
}

.service-card-back-content p:nth-child(2) {
    transition-delay: 0.4s;
}

.service-card-back-content p:last-child {
    margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .service-card-hover {
        min-height: 240px;
    }
    
    .service-card-front {
        padding: 1.5rem 1rem;
    }
    
    .service-card-hover:hover .service-card-front {
        padding: 1rem;
    }
    
    .service-card-front i {
        font-size: 2.5rem;
        margin-bottom: 0.75rem;
    }
    
    .service-card-hover:hover .service-card-front i {
        font-size: 1.5rem;
        margin-bottom: 0.25rem;
    }
    
    .service-card-front h3 {
        font-size: 0.95rem;
    }
    
    .service-card-hover:hover .service-card-front h3 {
        font-size: 0.85rem;
    }
    
    .service-card-back-header {
        padding: 1rem;
    }
    
    .service-card-back-header i {
        font-size: 1.5rem;
    }
    
    .service-card-back-header h4 {
        font-size: 0.85rem;
    }
    
    .service-card-back-content {
        padding: 1rem;
    }
    
    .service-card-back-content p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
}

/* Mobile Touch - Rendre le contenu visible au tap */
@media (hover: none) and (pointer: coarse) {
    .service-card-hover {
        min-height: 260px;
    }
    
    .service-card-hover.active .service-card-front {
        top: 0;
        transform: translateY(0);
        padding: 1rem;
    }
    
    .service-card-hover.active .service-card-front i {
        font-size: 1.5rem;
        color: var(--color-accent);
        margin-bottom: 0.25rem;
    }
    
    .service-card-hover.active .service-card-front h3 {
        font-size: 0.85rem;
        color: var(--color-white);
    }
    
    .service-card-hover.active .service-card-back {
        opacity: 1;
    }
}

/* Old styles to remove */
.service-tile-wrapper,
.service-tile-clickable,
.service-detail-content,
.service-close-btn {
    display: none;
}

/* Modal Customization */
.modal-header.bg-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0D3D5F 100%) !important;
}

.modal-content {
    border: none;
    border-radius: 1rem;
    overflow: hidden;
}

.modal-header {
    border-bottom: 2px solid var(--color-accent);
}

.modal-body {
    line-height: 1.7;
}

/* Service Collapse/Déroulant */
.service-collapse {
    margin-top: 1.5rem;
}

.service-detail-card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
    overflow: hidden;
    background: var(--color-white);
}

.service-detail-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0D3D5F 100%);
    color: var(--color-white);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    margin: -1rem -1rem 1rem -1rem;
}

.service-detail-header i {
    font-size: 1.75rem;
    color: var(--color-accent);
}

.service-detail-header h4 {
    color: var(--color-white);
}

.service-detail-body {
    line-height: 1.7;
}

@media (max-width: 768px) {
    .service-collapse {
        margin-top: 1rem;
    }
    
    .service-detail-header {
        padding: 1.25rem;
    }
}

.service-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.service-card:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    transform: translateY(-8px);
    border-color: rgba(0, 217, 255, 0.3);
    background: rgba(255, 255, 255, 0.9);
}

.service-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0D3D5F 100%);
    color: var(--color-white);
    padding: 1.5rem;
    display: flex;
    align-items: center;
}

.service-card-header i {
    font-size: 1.75rem;
    color: var(--color-accent);
    transition: var(--transition-smooth);
}

.service-card:hover .service-card-header i {
    transform: scale(1.15);
}

.service-card-header h3 {
    color: var(--color-white);
    margin: 0;
}

.service-card-body {
    padding: 1.5rem;
    line-height: 1.7;
}

@media (max-width: 768px) {
    .service-card-header {
        padding: 1.25rem;
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .service-card-header i {
        font-size: 2rem;
        margin: 0;
    }
    
    .service-card-body {
        padding: 1.25rem;
    }
}

/* ===================================
   Accordion (Deprecated - Kept for backward compatibility)
   =================================== */
.accordion-item {
    border: none;
    margin-bottom: 1rem;
    border-radius: 0.5rem !important;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: var(--transition-smooth);
}

.accordion-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.accordion-button {
    font-weight: 600;
    font-size: 1.1rem;
    padding: 1.25rem 1.5rem;
    background-color: var(--color-white);
    color: var(--color-primary);
    transition: var(--transition-smooth);
}

.accordion-button:not(.collapsed) {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(0, 217, 255, 0.25);
    border-color: var(--color-accent);
}

.accordion-button::after {
    filter: brightness(0) saturate(100%);
}

.accordion-button:not(.collapsed)::after {
    filter: brightness(0) saturate(100%) invert(1);
}

.accordion-body {
    padding: 1.5rem;
    background-color: var(--color-white);
    font-size: 1rem;
    line-height: 1.7;
}

/* ===================================
   Profile Section
   =================================== */
.profile-placeholder {
    width: 200px;
    height: 200px;
    border: 4px solid var(--color-accent);
}

@media (max-width: 768px) {
    .profile-placeholder {
        width: 150px;
        height: 150px;
    }
}

/* ===================================
   Cards & Hover Effects - Glassmorphism Uniforme
   =================================== */
.card {
    transition: var(--transition-smooth);
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    border-color: rgba(0, 217, 255, 0.3);
}

.hover-card {
    cursor: pointer;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: var(--transition-smooth);
}

.hover-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15) !important;
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 217, 255, 0.4);
}

.hover-card:hover .bi {
    color: var(--color-primary) !important;
    transform: scale(1.1);
}

.process-icon i {
    transition: var(--transition-smooth);
}

/* ===================================
   Footer - Contrastes améliorés
   =================================== */
footer {
    position: relative;
    background-color: #0A2540 !important;
}

footer h5,
footer h6 {
    color: var(--color-white) !important;
    font-weight: 700;
}

footer p,
footer .small {
    color: rgba(255, 255, 255, 0.8) !important;
}

footer .text-muted {
    color: rgba(255, 255, 255, 0.65) !important;
}

.hover-link {
    transition: var(--transition-fast);
    color: rgba(255, 255, 255, 0.8) !important;
}

.hover-link:hover {
    color: var(--color-accent) !important;
    padding-left: 5px;
}

footer a i {
    transition: var(--transition-smooth);
}

footer a:hover i {
    transform: scale(1.2);
    color: var(--color-accent) !important;
}

/* ===================================
   Animations - Fade In Up (Enhanced)
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Délais d'animation pour effet cascade */
.fade-in:nth-child(1) { transition-delay: 0.1s; }
.fade-in:nth-child(2) { transition-delay: 0.2s; }
.fade-in:nth-child(3) { transition-delay: 0.3s; }
.fade-in:nth-child(4) { transition-delay: 0.4s; }

/* ===================================
   Responsive Utilities
   =================================== */
@media (max-width: 576px) {
    .display-3 {
        font-size: 2.5rem;
    }
    
    .display-5 {
        font-size: 2rem;
    }
    
    .btn-lg {
        padding: 0.75rem 2rem;
        font-size: 1rem;
    }
}

/* ===================================
   Smooth Scroll Offset
   =================================== */
html {
    scroll-padding-top: 80px;
}

/* ===================================
   Accessibility
   =================================== */
.btn:focus,
.accordion-button:focus {
    outline: none;
    box-shadow: none;
}

.nav-link:focus {
    outline: none;
    box-shadow: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-accent {
        border: 2px solid var(--color-dark);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .navbar,
    .btn,
    footer {
        display: none;
    }
    
    section {
        page-break-inside: avoid;
    }
}