/* ===================================
   NeuroWave Landing Page Styles
   Mobile-First Responsive Design
   Modern Gradient Theme
   =================================== */

/* ===== CSS Variables ===== */
:root {
    /* Colors - Modern Gradient Theme */
    --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    --primary-color: #4F46E5;
    --secondary-color: #06B6D4;
    --accent-color: #7C3AED;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    
    /* Neutrals */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes - Mobile First */
    --fs-xs: 0.75rem;     /* 12px */
    --fs-sm: 0.875rem;    /* 14px */
    --fs-base: 1rem;      /* 16px */
    --fs-lg: 1.125rem;    /* 18px */
    --fs-xl: 1.25rem;     /* 20px */
    --fs-2xl: 1.5rem;     /* 24px */
    --fs-3xl: 1.875rem;   /* 30px */
    --fs-4xl: 2.25rem;    /* 36px */
    --fs-5xl: 3rem;       /* 48px */
    
    /* Spacing */
    --spacing-xs: 0.5rem;   /* 8px */
    --spacing-sm: 1rem;     /* 16px */
    --spacing-md: 1.5rem;   /* 24px */
    --spacing-lg: 2rem;     /* 32px */
    --spacing-xl: 3rem;     /* 48px */
    --spacing-2xl: 4rem;    /* 64px */
    --spacing-3xl: 6rem;    /* 96px */
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: 1rem;
    --header-height: 70px;
    --border-radius: 1rem;
    --border-radius-sm: 0.5rem;
    
    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.3);
}

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 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;
        scroll-behavior: auto !important;
    }
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: var(--fs-2xl);
}

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

h3 {
    font-size: var(--fs-lg);
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--secondary-color);
}

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

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

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

.section__title {
    font-size: var(--fs-2xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section__subtitle {
    text-align: center;
    font-size: var(--fs-lg);
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.text-left {
    text-align: left;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: var(--fs-base);
    font-weight: 600;
    font-family: var(--font-heading);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
    min-height: 48px;
    white-space: nowrap;
}

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

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

.btn-primary:active {
    transform: scale(0.98);
}

.btn-large {
    padding: 1.125rem 2rem;
    font-size: var(--fs-lg);
    min-height: 56px;
}

.btn-pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.7);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(79, 70, 229, 0);
    }
}

/* ===== Header & Navigation ===== */
.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: 1000;
    transition: var(--transition-base);
}

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

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav__logo {
    font-size: var(--fs-xl);
    font-weight: 800;
    font-family: var(--font-heading);
}

.logo-text {
    color: var(--gray-900);
}

.logo-highlight {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav__link {
    color: var(--gray-700);
    font-weight: 500;
    padding: 0.5rem;
    transition: var(--transition-fast);
}

.nav__link:hover {
    color: var(--primary-color);
}

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

.btn-nav {
    padding: 0.625rem 1.25rem;
    font-size: var(--fs-sm);
}

.nav__toggle,
.nav__close {
    display: none;
    cursor: pointer;
    padding: 0.5rem;
}

/* Mobile Navigation */
@media screen and (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        padding: var(--spacing-2xl) var(--spacing-md);
        transition: right 0.4s ease;
        z-index: 100;
    }
    
    .nav__menu.show-menu {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
        margin-top: var(--spacing-2xl);
    }
    
    .nav__link {
        font-size: var(--fs-lg);
    }
    
    .nav__close {
        display: block;
        position: absolute;
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .nav__toggle {
        display: block;
    }
    
    .btn-nav {
        display: none;
    }
}

/* ===== Hero Section ===== */
.hero {
    padding-top: calc(var(--header-height) + var(--spacing-2xl));
    padding-bottom: var(--spacing-2xl);
    background: linear-gradient(135deg, #f5f7ff 0%, #e0f2fe 100%);
}

.hero__container {
    display: grid;
    gap: var(--spacing-xl);
}

.hero__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.hero__badge {
    display: inline-block;
    align-self: flex-start;
    padding: 0.5rem 1rem;
    background: rgba(79, 70, 229, 0.1);
    border-radius: 2rem;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--primary-color);
}

.hero__title {
    font-size: var(--fs-2xl);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.hero__description p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-sm);
}

.hero__benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.benefit-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.benefit-icon {
    font-size: var(--fs-2xl);
    flex-shrink: 0;
}

.hero__image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__image img {
    position: relative;
    z-index: 2;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
}

/* Brainwave Animation */
.brainwave-animation {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

.wave {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 120px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    opacity: 0;
    transform: translate(-50%, -50%);
    animation: wave-pulse 3s infinite;
}

.wave-1 { animation-delay: 0s; }
.wave-2 { animation-delay: 0.5s; border-color: var(--secondary-color); }
.wave-3 { animation-delay: 1s; }
.wave-4 { animation-delay: 1.5s; border-color: var(--accent-color); }

@keyframes wave-pulse {
    0% {
        width: 120px;
        height: 120px;
        opacity: 0.8;
    }
    100% {
        width: 300px;
        height: 300px;
        opacity: 0;
    }
}

/* ===== Why Choose Us ===== */
.why-choose {
    background: var(--gray-50);
}

.why-choose__grid {
    display: grid;
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.feature-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
}

.feature-card__icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.feature-card__title {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
}

.feature-card__description {
    color: var(--gray-600);
    font-size: var(--fs-sm);
}

/* ===== Features Section ===== */
.features__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.feature-detail {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.feature-detail::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-base);
    z-index: 0;
}

.feature-detail:hover::before {
    opacity: 0.03;
}

.feature-detail__number {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    font-size: var(--fs-5xl);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
}

.feature-detail__title {
    font-size: var(--fs-xl);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.feature-detail__text {
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

/* ===== About Section ===== */
.about__container {
    display: grid;
    gap: var(--spacing-xl);
    align-items: center;
}

.about__text p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about__image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

/* ===== How It Works ===== */
.how-it-works {
    background: linear-gradient(135deg, #f5f7ff 0%, #e0f2fe 100%);
}

.how-it-works__description {
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
    text-align: center;
}

.how-it-works__description p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.steps {
    display: grid;
    gap: var(--spacing-lg);
}

.step-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.step-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.step-item__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    font-weight: 700;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.step-item__content h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-xs);
}

.step-item__content p {
    color: var(--gray-600);
    font-size: var(--fs-sm);
}

/* ===== Reviews Section ===== */
.reviews__grid {
    display: grid;
    gap: var(--spacing-lg);
}

.review-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.review-card:nth-child(1) { animation-delay: 0.1s; }
.review-card:nth-child(2) { animation-delay: 0.2s; }
.review-card:nth-child(3) { animation-delay: 0.3s; }

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

.review-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
}

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

.review-card__avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.review-card__name {
    font-size: var(--fs-lg);
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.review-card__badge {
    font-size: var(--fs-xs);
    color: var(--primary-color);
    font-weight: 600;
}

.review-card__rating {
    margin-bottom: var(--spacing-sm);
}

.review-card__rating img {
    width: 100px;
}

.review-card__text {
    color: var(--gray-700);
    line-height: 1.8;
    font-size: var(--fs-sm);
}

/* ===== Science Section ===== */
.science {
    background: var(--gray-50);
}

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

.science__content p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.science__highlights {
    display: grid;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.highlight-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.highlight-item svg {
    flex-shrink: 0;
    color: var(--success-color);
}

.science__cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===== Pricing Section ===== */
.pricing {
    background: linear-gradient(135deg, #f5f7ff 0%, #e0f2fe 100%);
}

.countdown {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.countdown__item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown__value {
    font-size: var(--fs-4xl);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.countdown__label {
    font-size: var(--fs-xs);
    text-transform: uppercase;
    color: var(--gray-600);
    margin-top: 0.25rem;
}

.countdown__separator {
    font-size: var(--fs-4xl);
    font-weight: 800;
    color: var(--primary-color);
}

.pricing__card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
}

.pricing__badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-gradient);
    color: var(--white);
    font-size: var(--fs-xs);
    font-weight: 700;
    text-transform: uppercase;
    border-radius: 2rem;
    margin-bottom: var(--spacing-md);
}

.pricing__title {
    font-size: var(--fs-xl);
    text-align: center;
    margin-bottom: 0.5rem;
}

.pricing__subtitle {
    text-align: center;
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.pricing__image {
    max-width: 200px;
    margin: var(--spacing-md) auto;
}

.pricing__price {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.pricing__regular {
    display: block;
    font-size: var(--fs-lg);
    color: var(--gray-500);
    text-decoration: line-through;
    margin-bottom: 0.5rem;
}

.pricing__special {
    display: block;
    font-size: var(--fs-4xl);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing__badges {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.pricing__badge-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--fs-sm);
    color: var(--gray-700);
}

.pricing__badge-item svg {
    flex-shrink: 0;
    color: var(--success-color);
}

.btn-pricing {
    width: 100%;
    margin: var(--spacing-lg) 0;
}

.pricing__payment {
    text-align: center;
    margin-top: var(--spacing-md);
}

.pricing__payment p {
    font-size: var(--fs-sm);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
}

.payment-logos {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: var(--fs-2xl);
}

.pricing__rating {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.pricing__rating img {
    max-width: 120px;
    margin: 0 auto var(--spacing-xs);
}

.pricing__rating p {
    font-size: var(--fs-sm);
    color: var(--gray-600);
}

/* ===== Benefits Section ===== */
.benefits__content p {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    color: var(--gray-700);
    line-height: 1.8;
    text-align: center;
}

.benefits__list {
    display: grid;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.benefit-detail {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.benefit-detail:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.benefit-detail__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.benefit-detail__content h3 {
    font-size: var(--fs-base);
    margin-bottom: 0.25rem;
}

.benefit-detail__content p {
    font-size: var(--fs-sm);
    color: var(--gray-600);
    text-align: left;
}

/* ===== Usage Section ===== */
.usage {
    background: var(--gray-50);
}

.usage__steps {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.usage-step {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.usage-step:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.usage-step__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-xl);
    font-weight: 700;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.usage-step__title {
    font-size: var(--fs-lg);
    margin-bottom: 0.5rem;
}

.usage-step__text {
    color: var(--gray-600);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

/* ===== Pros and Cons ===== */
.pros-cons__grid {
    display: grid;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.pros-cons__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--fs-xl);
    margin-bottom: var(--spacing-lg);
}

.pros-title {
    color: var(--success-color);
}

.cons-title {
    color: var(--danger-color);
}

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

.pros-cons__item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius-sm);
}

.pros .pros-cons__item {
    border-left: 4px solid var(--success-color);
}

.cons .pros-cons__item {
    border-left: 4px solid var(--danger-color);
}

.pros-cons__icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.pros .pros-cons__icon {
    color: var(--success-color);
}

.cons .pros-cons__icon {
    color: var(--danger-color);
}

.pros-cons__content h4 {
    font-size: var(--fs-base);
    margin-bottom: 0.25rem;
}

.pros-cons__content p {
    font-size: var(--fs-sm);
    color: var(--gray-600);
}

/* ===== Guarantee Section ===== */
.guarantee {
    background: linear-gradient(135deg, #f5f7ff 0%, #e0f2fe 100%);
}

.guarantee__container {
    display: grid;
    gap: var(--spacing-xl);
    align-items: center;
}

.guarantee__image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

.guarantee__points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.guarantee-point {
    display: flex;
    gap: var(--spacing-md);
}

.guarantee-point__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.guarantee-point__content h3 {
    font-size: var(--fs-lg);
    margin-bottom: 0.5rem;
}

.guarantee-point__content p {
    color: var(--gray-600);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

.guarantee__note {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(79, 70, 229, 0.1);
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--primary-color);
    color: var(--gray-700);
    font-size: var(--fs-sm);
}

/* ===== Creator Section ===== */
.creator__content {
    max-width: 900px;
    margin: 0 auto;
}

.creator__content p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* ===== Where to Buy ===== */
.where-to-buy {
    background: var(--gray-50);
}

.where-to-buy__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.where-to-buy__content p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.where-to-buy__cta {
    margin-top: var(--spacing-xl);
}

/* ===== Purchase Process ===== */
.purchase-process__container {
    display: grid;
    gap: var(--spacing-xl);
    align-items: center;
}

.purchase-process__image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

.process-steps {
    display: grid;
    gap: var(--spacing-lg);
}

.process-step {
    display: flex;
    gap: var(--spacing-md);
}

.process-step__number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    font-weight: 700;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: 50%;
}

.process-step__content h3 {
    font-size: var(--fs-lg);
    margin-bottom: 0.5rem;
}

.process-step__content p {
    color: var(--gray-600);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

.purchase-process__assurance {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--border-radius);
}

.purchase-process__assurance p {
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

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

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

.faq-item__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--white);
    border: none;
    cursor: pointer;
    font-size: var(--fs-base);
    font-weight: 600;
    text-align: left;
    color: var(--gray-900);
    transition: var(--transition-base);
    min-height: 56px;
}

.faq-item__question:hover {
    background: var(--gray-50);
}

.faq-icon {
    flex-shrink: 0;
    transition: var(--transition-base);
}

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

.faq-item__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

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

.faq-item__answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--gray-700);
    line-height: 1.8;
}

/* ===== Final CTA ===== */
.final-cta {
    background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
    color: var(--white);
}

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

.final-cta__image {
    max-width: 300px;
    margin: 0 auto var(--spacing-lg);
}

.final-cta__image img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-2xl);
}

.final-cta__title {
    font-size: var(--fs-2xl);
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.final-cta__price {
    margin: var(--spacing-lg) 0;
}

.final-cta__regular {
    display: block;
    font-size: var(--fs-lg);
    text-decoration: line-through;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.final-cta__special {
    display: block;
    font-size: var(--fs-4xl);
    font-weight: 800;
}

.final-cta__subtitle {
    font-size: var(--fs-base);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.final-cta .btn-primary {
    background: var(--white);
    color: var(--primary-color);
}

.final-cta .btn-primary:hover {
    transform: translateY(-2px) scale(1.05);
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer__container {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

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

.footer__title {
    font-size: var(--fs-lg);
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--spacing-xs);
}

.footer__links a {
    color: var(--gray-400);
    font-size: var(--fs-sm);
    transition: var(--transition-fast);
}

.footer__links a:hover {
    color: var(--white);
}

.footer__disclaimer {
    font-size: var(--fs-xs);
    line-height: 1.6;
    color: var(--gray-400);
    margin-bottom: var(--spacing-sm);
}

.footer__contact p {
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-xs);
}

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

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-800);
    border-radius: 50%;
    color: var(--gray-400);
    transition: var(--transition-base);
}

.footer__social a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-800);
}

.footer__bottom p {
    font-size: var(--fs-sm);
    color: var(--gray-500);
}

/* ===== Scroll to Top Button ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    z-index: 999;
}

.scroll-to-top.show {
    display: flex;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===== Purchase Notification ===== */
.purchase-notification {
    position: fixed;
    bottom: 30px;
    left: 30px;
    max-width: 350px;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-xl);
    transform: translateX(-400px);
    transition: transform 0.5s ease;
    z-index: 999;
}

.purchase-notification.show {
    transform: translateX(0);
}

.purchase-notification__content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.purchase-notification__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success-color);
    color: var(--white);
    border-radius: 50%;
    font-size: var(--fs-lg);
}

.purchase-notification__text {
    font-size: var(--fs-sm);
    color: var(--gray-700);
}

/* ===== Responsive Design ===== */

/* Tablets: 576px and up */
@media screen and (min-width: 576px) {
    :root {
        --container-padding: 1.5rem;
    }
    
    .hero__title {
        font-size: var(--fs-3xl);
    }
    
    .section__title {
        font-size: var(--fs-3xl);
    }
    
    .why-choose__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reviews__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .countdown__value {
        font-size: var(--fs-5xl);
    }
}

/* Tablets landscape: 768px and up */
@media screen and (min-width: 768px) {
    :root {
        --container-padding: 2rem;
        --header-height: 80px;
    }
    
    .hero__title {
        font-size: var(--fs-4xl);
    }
    
    .section__title {
        font-size: var(--fs-4xl);
    }
    
    h2 {
        font-size: var(--fs-2xl);
    }
    
    .hero__container {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-2xl);
    }
    
    .about__container {
        grid-template-columns: 1fr 1fr;
    }
    
    .guarantee__container {
        grid-template-columns: 1fr 1.2fr;
    }
    
    .purchase-process__container {
        grid-template-columns: 1fr 1fr;
    }
    
    .why-choose__grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .reviews__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pros-cons__grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer__container {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop: 1024px and up */
@media screen and (min-width: 1024px) {
    .hero__title {
        font-size: var(--fs-5xl);
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
    
    .final-cta__title {
        font-size: var(--fs-3xl);
    }
}

/* Large Desktop: 1440px and up */
@media screen and (min-width: 1440px) {
    :root {
        --container-max: 1400px;
    }
}

/* ===== Utility Classes ===== */
.fade-in {
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease;
}

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

.slide-in-right {
    animation: slideInRight 0.6s ease;
}

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

/* ===== Print Styles ===== */
@media print {
    .header,
    .nav,
    .scroll-to-top,
    .purchase-notification,
    .btn {
        display: none !important;
    }
}