/* ========================================
   MILAIA - Enterprise Tech Design System
   Mobile-First Responsive & Performance Optimized
   ======================================== */

/* ========================================
   Design Tokens (CSS Variables)
   ======================================== */
:root {
    /* Color Palette */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-card: #1E293B;
    --bg-card-hover: #334155;
    --surface-light: #F8FAFC;
    
    --brand-primary: #2563EB;
    --brand-accent: #38BDF8;
    --brand-glow: rgba(37, 99, 235, 0.4);
    --accent-glow: rgba(56, 189, 248, 0.3);
    
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    
    --border-subtle: rgba(148, 163, 184, 0.1);
    --border-accent: rgba(56, 189, 248, 0.3);
    
    /* Glass Effect */
    --glass-bg: rgba(30, 41, 59, 0.5);
    --glass-border: rgba(148, 163, 184, 0.15);
    
    /* Typography Scale */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Public Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing Scale - Mobile First */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 2.5rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 32px var(--brand-glow);
    --shadow-accent-glow: 0 0 24px var(--accent-glow);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

/* ========================================
   Background Effects
   ======================================== */
.bg-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(56, 189, 248, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56, 189, 248, 0.02) 1px, transparent 1px);
    background-size: 64px 64px;
    animation: gridFlow 30s linear infinite;
}

@keyframes gridFlow {
    0% { transform: translateY(0); }
    100% { transform: translateY(64px); }
}

.bg-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.12;
    will-change: transform;
}

.orb-1 {
    top: -15%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: var(--brand-accent);
    animation: float 18s ease-in-out infinite;
}

.orb-2 {
    bottom: -10%;
    left: -15%;
    width: 350px;
    height: 350px;
    background: var(--brand-primary);
    animation: float 22s ease-in-out infinite reverse;
}

.orb-3 {
    top: 40%;
    left: 50%;
    width: 300px;
    height: 300px;
    background: var(--brand-accent);
    animation: float 25s ease-in-out infinite;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(80px, -60px) scale(1.1); }
    66% { transform: translate(-60px, 80px) scale(0.95); }
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
    z-index: 1;
}

/* ========================================
   Navigation Bar with ScrollSpy
   ======================================== */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    z-index: 10000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

nav.scrolled {
    background: rgba(15, 23, 42, 0.85);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 10001;
    min-height: 64px;
}

/* Logo Container - Optimized */
.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.3s ease;
    background: transparent !important;
    padding: 0;
}

.logo-container:hover,
.logo-container:focus {
    transform: scale(1.02);
}

.logo-image {
    height: 35px;
    width: auto;
    display: block;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.logo-container:hover .logo-image {
    transform: scale(1.05);
    filter: drop-shadow(0 0 12px var(--accent-glow));
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    will-change: transform;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    letter-spacing: -0.01em;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-accent);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Active Section Indicator (ScrollSpy) */
.nav-links a.active {
    color: var(--text-primary);
}

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

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: block;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
}

.mobile-menu-toggle:hover {
    color: var(--brand-accent);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 100px;
    padding-bottom: var(--space-2xl);
    position: relative;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--brand-accent);
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--brand-accent);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 24px rgba(56, 189, 248, 0.3), 0 0 48px rgba(56, 189, 248, 0.15);
}

.hero-badge i {
    color: var(--brand-accent);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 8vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.1s backwards;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--brand-accent) 0%, var(--brand-primary) 50%, var(--brand-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
}

.hero h1 .highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
    border-radius: 2px;
    box-shadow: 0 0 16px var(--accent-glow);
}

.hero p {
    font-size: clamp(1rem, 3vw, 1.125rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-lg);
    line-height: 1.7;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(32px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.75rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    min-height: 48px;
    white-space: nowrap;
}

.btn span,
.btn i {
    position: relative;
    z-index: 2;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    color: var(--bg-primary);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(56, 189, 248, 0.35);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    border-color: var(--brand-accent);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.2);
}

/* Button Submit States */
.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-loading {
    display: none;
}

/* ========================================
   Section Styling
   ======================================== */
section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--brand-accent);
    margin-bottom: var(--space-md);
    letter-spacing: 0.02em;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-header p {
    font-size: clamp(0.9375rem, 2.5vw, 1.125rem);
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================
   Services Section - Flip Cards 3D
   ======================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
    perspective: 1000px;
}

.flip-card {
    background: transparent;
    height: 280px;
    perspective: 1000px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.flip-card-front {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: var(--space-md);
    color: var(--bg-primary);
}

.flip-card-front h3 {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.coming-soon-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.flip-card-back {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(56, 189, 248, 0.15));
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--brand-accent);
    transform: rotateY(180deg);
    box-shadow: 0 8px 32px rgba(56, 189, 248, 0.2);
}

.flip-card-back p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.6;
    max-width: 90%;
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing-grid-single {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: var(--space-2xl);
}

.pricing-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 480px;
    width: 100%;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-accent), var(--brand-primary));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.pricing-card.featured {
    border: 2px solid var(--brand-accent);
    box-shadow: 0 24px 64px rgba(56, 189, 248, 0.25);
    transform: scale(1.02);
}

.pricing-card.featured::before {
    opacity: 1;
}

.pricing-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    color: var(--bg-primary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 16px rgba(56, 189, 248, 0.3);
}

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

.pricing-header h3 {
    font-family: var(--font-heading);
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
    color: var(--brand-accent);
}

.pricing-header p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9375rem;
}

.pricing-price {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.pricing-price .amount {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 6vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.pricing-features li {
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    color: var(--brand-accent);
    margin-top: 0.25rem;
    flex-shrink: 0;
    font-size: 1rem;
}

.pricing-features li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
   Differentials Section - Solid Tech Style
   ======================================== */
.differentials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

.differential-card {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.12);
    border-left: 4px solid var(--brand-accent);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.differential-card:hover {
    transform: translateX(8px);
    border-left-color: var(--brand-primary);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.15);
}

.differential-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--bg-primary);
}

.differential-card h3 {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.differential-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ========================================
   Contact Section
   ======================================== */
#contacto {
    background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(30, 41, 59, 0.3) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.625rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.3s ease;
    min-height: 72px;
}

.contact-method:hover {
    transform: translateX(8px);
    border-color: var(--brand-accent);
    box-shadow: 0 8px 24px rgba(56, 189, 248, 0.15);
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--bg-primary);
    flex-shrink: 0;
}

.contact-icon.whatsapp {
    background: linear-gradient(135deg, #25D366, #128C7E);
}

.contact-details h4 {
    font-family: var(--font-heading);
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Contact Form - Glassmorphism */
.contact-form-container {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
}

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

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

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
    min-height: 48px;
}

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

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
    background: rgba(15, 23, 42, 0.7);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    margin-top: var(--space-sm);
    text-align: center;
    font-size: 0.9375rem;
    color: var(--brand-accent);
}

/* ========================================
   WhatsApp Floating Button
   ======================================== */
.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #25D366, #128C7E);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
    z-index: 9999;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulseWhatsApp 2s ease-in-out infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(37, 211, 102, 0.5);
}

@keyframes pulseWhatsApp {
    0%, 100% {
        box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 8px 32px rgba(37, 211, 102, 0.6), 0 0 0 8px rgba(37, 211, 102, 0.2);
    }
}

/* ========================================
   Footer
   ======================================== */
footer {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--glass-border);
    padding: var(--space-xl) 0;
    position: relative;
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ========================================
   Scroll Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(32px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ========================================
   Responsive Design - TABLET
   ======================================== */
@media (min-width: 768px) {
    :root {
        --space-xl: 3rem;
        --space-2xl: 4rem;
        --space-3xl: 6rem;
    }
    
    .container {
        padding: 0 var(--space-lg);
    }
    
    .nav-container {
        padding: var(--space-md) var(--space-lg);
    }
    
    .nav-links {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .differentials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Hover effect only on desktop */
    .flip-card:hover .flip-card-inner {
        transform: rotateY(180deg);
    }
    
    .orb-1 {
        width: 600px;
        height: 600px;
    }
    
    .orb-2 {
        width: 500px;
        height: 500px;
    }
    
    .orb-3 {
        width: 400px;
        height: 400px;
    }
}

/* DESKTOP */
@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .differentials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-card.featured {
        transform: scale(1.05);
    }
}

/* LARGE DESKTOP */
@media (min-width: 1280px) {
    .nav-links {
        gap: var(--space-xl);
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.mono {
    font-family: var(--font-mono) !important;
}

.text-gradient {
    background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}