/* ===============================================
   CSS Reset and Base Styles
   =============================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* EYL Brand Colors */
    --color-flame: #FF6B35;
    --color-jade: #10B981;
    --color-amber: #F59E0B;
    --color-sky: #3B82F6;
    --color-violet: #8B5CF6;

    /* Neutral Colors */
    --color-navy: #1A1F2E;
    --color-gray-900: #111827;
    --color-gray-800: #1F2937;
    --color-gray-700: #374151;
    --color-gray-600: #4B5563;
    --color-gray-500: #6B7280;
    --color-gray-400: #9CA3AF;
    --color-gray-300: #D1D5DB;
    --color-gray-200: #E5E7EB;
    --color-gray-100: #F3F4F6;
    --color-white: #FFFFFF;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* 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);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-gray-900);
    line-height: 1.6;
    background-color: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===============================================
   Navigation
   =============================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-flame);
}

.brand-name {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-navy);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    text-decoration: none;
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
    transition: color 0.3s ease;
}

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

/* ===============================================
   Hero Section
   =============================================== */

.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-flame);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.hero-platforms {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-mockup {
    width: 400px;
    height: 600px;
    background: linear-gradient(135deg, var(--color-flame) 0%, var(--color-violet) 100%);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* ===============================================
   Buttons
   =============================================== */

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #E55A2A;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-navy);
    border-color: var(--color-navy);
}

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

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

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

/* ===============================================
   Section Styles
   =============================================== */

section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-navy);
}

/* ===============================================
   Philosophy Section
   =============================================== */

.philosophy {
    background-color: var(--color-white);
}

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

.philosophy-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.philosophy-card h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.philosophy-card p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===============================================
   Key Concepts Section
   =============================================== */

.key-concepts {
    background: linear-gradient(135deg, #F3F4F6 0%, #E5E7EB 100%);
}

.concepts-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.concept-item {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.concept-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 30px;
    top: 60px;
    width: 2px;
    height: calc(100% + var(--spacing-xl));
    background: var(--color-gray-300);
}

.concept-number {
    width: 60px;
    height: 60px;
    background: var(--color-flame);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}

.concept-content {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.concept-content h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.concept-content p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===============================================
   Features Section
   =============================================== */

.features {
    background-color: var(--color-white);
}

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

.feature-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===============================================
   How It Works Section
   =============================================== */

.how-it-works {
    background: linear-gradient(135deg, #1A1F2E 0%, #374151 100%);
    color: var(--color-white);
}

.how-it-works .section-title {
    color: var(--color-white);
}

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

.step {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--color-flame);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    box-shadow: 0 0 30px rgba(255, 107, 53, 0.4);
}

.step-content h3 {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.step-content p {
    color: var(--color-gray-300);
    line-height: 1.8;
    font-size: 1.125rem;
}

/* ===============================================
   Testimonials Section
   =============================================== */

.testimonials {
    background-color: var(--color-gray-100);
}

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

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

.testimonial-text {
    font-size: 1.125rem;
    color: var(--color-gray-700);
    font-style: italic;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.testimonial-author {
    color: var(--color-gray-500);
    font-weight: var(--font-weight-semibold);
}

/* ===============================================
   Pricing Section
   =============================================== */

.pricing {
    background-color: var(--color-white);
}

.pricing-subtitle {
    text-align: center;
    color: var(--color-gray-600);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

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

.pricing-card.featured {
    border-color: var(--color-flame);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-flame);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.price {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-flame);
    line-height: 1;
}

.price-period {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.savings {
    color: var(--color-jade);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.features-list {
    list-style: none;
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.features-list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-700);
}

/* ===============================================
   Download Section
   =============================================== */

.download {
    background: linear-gradient(135deg, var(--color-flame) 0%, var(--color-violet) 100%);
    color: var(--color-white);
    text-align: center;
}

.download .section-title {
    color: var(--color-white);
}

.download-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    color: var(--color-white);
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.store-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-white);
    color: var(--color-navy);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.store-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.store-icon {
    font-size: 2.5rem;
}

.store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.store-label {
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.store-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-navy);
}

.requirements {
    color: var(--color-white);
    opacity: 0.8;
    font-size: 0.875rem;
}

/* ===============================================
   Footer
   =============================================== */

.footer {
    background: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--color-gray-400);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

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

.footer-column a {
    color: var(--color-gray-400);
    text-decoration: none;
    display: block;
    padding: var(--spacing-xs) 0;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--color-flame);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-700);
    color: var(--color-gray-400);
}

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

@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .device-mockup {
        width: 300px;
        height: 450px;
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-tagline {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
    }

    .step {
        grid-template-columns: 60px 1fr;
    }

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .concept-item {
        grid-template-columns: 50px 1fr;
    }

    .concept-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ===============================================
   EYL Suite Section
   =============================================== */

.eyl-suite {
    background: linear-gradient(135deg, #1A1F2E 0%, #374151 100%);
    color: var(--color-white);
}

.suite-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.suite-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 107, 53, 0.2);
    color: var(--color-flame);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.eyl-suite .section-title {
    color: var(--color-white);
}

.suite-description {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.suite-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.suite-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
}

.suite-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.suite-card.main-app {
    border-color: var(--color-flame);
    background: rgba(255, 107, 53, 0.1);
}

.suite-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.suite-label {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.suite-content h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.suite-content p {
    color: var(--color-gray-300);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

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

.suite-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-300);
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: 0.875rem;
}

.suite-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-jade);
    font-weight: var(--font-weight-bold);
}

.suite-integration {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
}

.suite-integration h3 {
    font-size: 1.5rem;
    color: var(--color-flame);
    margin-bottom: var(--spacing-sm);
}

.suite-integration p {
    color: var(--color-gray-300);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

@media (max-width: 968px) {
    .suite-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ===============================================
   Animations
   =============================================== */

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

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