/* ===================================
   BizImpact - Premium Design System
   ================================== */

/* CSS Variables */
:root {
    /* Colors from Logo Gradient */
    --primary-blue: #0080FF;
    --primary-turquoise: #00D4AA;
    --primary-gold: #FFD700;
    
    /* Extended Palette */
    --dark-navy: #0B132B;
    --navy: #1a2332;
    --gray-dark: #343A40;
    --gray: #6c757d;
    --gray-light: #E9ECEF;
    --white: #FFFFFF;
    --black: #000000;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-turquoise) 50%, var(--primary-gold) 100%);
    --gradient-blue-turquoise: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-turquoise) 100%);
    --gradient-turquoise-gold: linear-gradient(135deg, var(--primary-turquoise) 0%, var(--primary-gold) 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(11, 19, 43, 0.95) 0%, rgba(11, 19, 43, 0.8) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    --font-size-4xl: 64px;
    
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--gray-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    line-height: var(--line-height-heading);
    color: var(--dark-navy);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray);
    font-weight: 400;
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.btn--large {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn--secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--outline {
    background: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn--outline:hover {
    background: var(--primary-blue);
    color: var(--white);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-fixed);
    transition: var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition-base);
}

.nav__brand:hover {
    opacity: 0.8;
}

.nav__logo {
    height: 40px;
    width: auto;
}

.nav__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav__link {
    font-weight: 500;
    color: var(--gray-dark);
    position: relative;
    padding: 8px 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    font-size: 24px;
    color: var(--dark-navy);
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero__gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
}

.hero__canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    color: var(--white);
}

.hero__title {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-md);
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat__number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat__label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

/* Problem Section */
.problem {
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-light) 100%);
}

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

.comparison__side {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.comparison__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.comparison__header i {
    font-size: 32px;
}

.comparison__side--before .comparison__header i {
    color: #dc3545;
}

.comparison__side--after .comparison__header i {
    color: #28a745;
}

.comparison__header h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.comparison__grid {
    display: grid;
    gap: var(--spacing-md);
}

.problem-card,
.solution-card {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.problem-card {
    background: rgba(220, 53, 69, 0.05);
    border-left: 4px solid #dc3545;
}

.solution-card {
    background: rgba(40, 167, 69, 0.05);
    border-left: 4px solid #28a745;
}

.problem-card i,
.solution-card i {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
}

.problem-card i {
    color: #dc3545;
}

.solution-card i {
    color: #28a745;
}

.problem-card h4,
.solution-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.problem-card p,
.solution-card p {
    color: var(--gray);
    font-size: var(--font-size-sm);
}

/* Products Section */
.products__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-card:hover::before {
    opacity: 1;
}

.product-card__icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Abstract Icon Styles */
.icon-network,
.icon-flow,
.icon-target,
.icon-growth {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Network Icon (Market) */
.icon-network {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 10px;
}

.network-node {
    width: 100%;
    height: 100%;
    background: var(--gradient-blue-turquoise);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.network-node:nth-child(2) { animation-delay: 0.2s; }
.network-node:nth-child(3) { animation-delay: 0.4s; }
.network-node:nth-child(4) { animation-delay: 0.6s; }

.network-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.network-lines line {
    stroke: var(--primary-blue);
    stroke-width: 2;
    opacity: 0.3;
}

/* Flow Icon (System) */
.icon-flow {
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: center;
}

.flow-line {
    height: 6px;
    background: var(--gradient-blue-turquoise);
    border-radius: var(--radius-sm);
    animation: flow 1.5s ease-in-out infinite;
}

.flow-line:nth-child(1) { width: 80%; }
.flow-line:nth-child(2) { width: 100%; animation-delay: 0.3s; }
.flow-line:nth-child(3) { width: 60%; animation-delay: 0.6s; }

.flow-glow {
    position: absolute;
    top: 50%;
    right: 0;
    width: 20px;
    height: 20px;
    background: var(--primary-gold);
    border-radius: 50%;
    transform: translateY(-50%);
    box-shadow: 0 0 20px var(--primary-gold);
    animation: glow 2s ease-in-out infinite;
}

/* Target Icon (Impact) */
.icon-target {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.target-ring {
    position: absolute;
    border: 3px solid var(--primary-turquoise);
    border-radius: 50%;
    animation: ripple 2s ease-out infinite;
}

.target-ring:nth-child(1) { width: 80%; height: 80%; }
.target-ring:nth-child(2) { width: 60%; height: 60%; animation-delay: 0.3s; }
.target-ring:nth-child(3) { width: 40%; height: 40%; animation-delay: 0.6s; }

.target-center {
    width: 20px;
    height: 20px;
    background: var(--gradient-turquoise-gold);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--primary-gold);
}

.target-wave {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-gold);
    border-radius: 50%;
    animation: wave 2s ease-out infinite;
}

/* Growth Icon (Academy) */
.icon-growth {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    padding: 10px;
}

.growth-step {
    background: var(--gradient-turquoise-gold);
    border-radius: var(--radius-sm);
    width: 12px;
    animation: grow 1.5s ease-in-out infinite;
}

.growth-step:nth-child(1) { height: 20%; animation-delay: 0s; }
.growth-step:nth-child(2) { height: 40%; animation-delay: 0.2s; }
.growth-step:nth-child(3) { height: 60%; animation-delay: 0.4s; }
.growth-step:nth-child(4) { height: 80%; animation-delay: 0.6s; }

.growth-arrow {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 12px solid var(--primary-gold);
    animation: float 2s ease-in-out infinite;
}

.growth-arrow::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: -2px;
    width: 4px;
    height: 20px;
    background: var(--primary-gold);
}

/* Product Card Content */
.product-card__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.product-card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--dark-navy);
}

.product-card__description {
    color: var(--gray);
    line-height: 1.6;
}

.product-card__features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.product-card__features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--gray-dark);
}

.product-card__features i {
    color: var(--primary-turquoise);
    font-size: 14px;
}

/* Stats Section */
.stats-section {
    background: var(--dark-navy);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.stat-card__icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card__number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
}

.stat-card__label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

/* Testimonials */
.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

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

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

.testimonial-card__avatar img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--primary-turquoise);
}

.testimonial-card__author h4 {
    font-weight: 600;
    color: var(--dark-navy);
    margin-bottom: 4px;
}

.testimonial-card__author p {
    font-size: var(--font-size-sm);
    color: var(--gray);
}

.testimonial-card__rating {
    display: flex;
    gap: 4px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-gold);
}

.testimonial-card__text {
    color: var(--gray-dark);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.testimonial-card__metrics {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-light);
}

.metric {
    flex: 1;
    text-align: center;
}

.metric__value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-turquoise);
    margin-bottom: 4px;
}

.metric__label {
    font-size: var(--font-size-sm);
    color: var(--gray);
}

/* FAQ Section */
.faq__container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-item__question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    cursor: pointer;
    user-select: none;
}

.faq-item__question h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-navy);
}

.faq-item__question i {
    color: var(--primary-blue);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-item__question i {
    transform: rotate(180deg);
}

.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-item__answer {
    max-height: 500px;
}

.faq-item__answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--gray);
    line-height: 1.7;
}

/* CTA Section */
.cta {
    position: relative;
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
}

.cta__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.1;
    z-index: -1;
}

.cta__content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta__title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-md);
}

.cta__subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--dark-navy);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition-base);
}

.footer__brand:hover {
    opacity: 0.8;
}

.footer__logo {
    height: 40px;
    width: auto;
}

.footer__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__tagline {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

.footer__social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    font-size: 18px;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
}

.footer__heading {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer__links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-base);
}

.footer__links a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer__wiki a {
    color: var(--primary-gold);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

@keyframes flow {
    0%, 100% { transform: translateX(0); opacity: 1; }
    50% { transform: translateX(10px); opacity: 0.6; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px var(--primary-gold); }
    50% { box-shadow: 0 0 40px var(--primary-gold); }
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

@keyframes wave {
    0% { transform: scale(0.5); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

@keyframes grow {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(1.1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 968px) {
    :root {
        --font-size-4xl: 48px;
        --font-size-3xl: 36px;
        --font-size-2xl: 28px;
    }
    
    .comparison {
        grid-template-columns: 1fr;
    }
    
    .products__grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--white);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        transition: left var(--transition-base);
        flex-direction: column;
        align-items: flex-start;
    }
    
    .nav__menu.active {
        left: 0;
    }
    
    .nav__list {
        flex-direction: column;
        width: 100%;
    }
    
    .nav__toggle {
        display: block;
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__buttons {
        flex-direction: column;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 576px) {
    :root {
        --font-size-4xl: 36px;
        --font-size-3xl: 28px;
        --font-size-2xl: 24px;
        --font-size-xl: 20px;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .product-card {
        padding: var(--spacing-md);
    }
    
    .testimonials__grid {
        grid-template-columns: 1fr;
    }
}