/* EMCopilot Landing Page Styles */
/* Inspired by LongDB.com */

/* Local fonts - see fonts.css */

:root {
    /* LongDB inspired colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --accent: #ef4444;
    --accent-light: #f87171;
    --orange: #f97316;
    --dark: #0f172a;
    --dark-lighter: #1e293b;
    --dark-card: #1a2744;
    --text-dark: #1e293b;
    --text: #64748b;
    --text-light: #94a3b8;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    --gradient-cta: linear-gradient(135deg, #1e3a8a 0%, #3730a3 50%, #4c1d95 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--white);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    background: var(--dark);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.logo-text {
    font-weight: 700;
    color: var(--white);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ===== Language Switcher ===== */
.lang-switch {
    display: flex;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 2px;
    margin-right: 8px;
}

.lang-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-light);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--white);
}

.lang-btn.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-dark {
    background: transparent;
    color: var(--text-dark);
    border: 1px solid var(--gray-200);
}

.btn-outline-dark:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--white);
}

.hero h1 .gradient-text {
    display: inline;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
}

/* ===== Platform Logos in Hero ===== */
.platform-logos {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.platform-label {
    font-size: 0.8rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.logos {
    display: flex;
    gap: 20px;
}

.platform-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.platform-logo.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.4);
}

.platform-logo.coming {
    opacity: 0.7;
}

.platform-logo:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.logo-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
}

.logo-status {
    font-size: 0.65rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.platform-logo.coming .logo-status {
    color: var(--orange);
}

/* ===== Stats Section ===== */
.stats {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
    padding: 48px 40px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 48px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Section Styles ===== */
.section {
    padding: 100px 0;
}

.section.light {
    background: var(--white);
}

.section.gray {
    background: var(--gray-50);
}

.section.dark {
    background: var(--dark);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
    padding: 6px 14px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 100px;
}

.section.dark .section-label {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
    line-height: 1.3;
}

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

.section-description {
    font-size: 1.05rem;
    color: var(--text);
    line-height: 1.7;
}

.section.dark .section-description {
    color: var(--text-light);
}

/* ===== Challenge Section ===== */
.challenge {
    background: var(--white);
}

.challenge-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.challenge-card {
    padding: 32px 24px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    text-align: center;
}

.challenge-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-light);
}

.challenge-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.challenge-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.challenge-card p {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.6;
}

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

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.platform-card {
    padding: 24px 20px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    position: relative;
}

.platform-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.platform-card.featured {
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border: none;
}

.platform-card.featured * {
    color: var(--white);
}

.platform-card.featured .platform-features li {
    border-color: rgba(255, 255, 255, 0.2);
}

.platform-card.featured .platform-features li::before {
    color: var(--white);
}

.platform-card.domestic {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    border: none;
}

.platform-card.domestic * {
    color: var(--white);
}

.platform-card.domestic .platform-features li {
    border-color: rgba(255, 255, 255, 0.2);
}

.platform-card.domestic .platform-features li::before {
    color: var(--white);
}

.platform-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    padding: 6px 14px;
    background: var(--secondary);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.platform-badge.coming {
    background: var(--orange);
}

.platform-badge.domestic {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    font-size: 0.75rem;
}

.platform-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.platform-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--white);
}

.platform-card.featured .platform-icon {
    background: rgba(255, 255, 255, 0.2);
}

.platform-icon.cst {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.platform-icon.hfss {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.platform-icon.emstudio {
    background: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
}

.platform-card.domestic .platform-icon {
    background: rgba(255, 255, 255, 0.2);
}

.platform-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.platform-company {
    font-size: 0.8rem;
    color: var(--text);
}

.platform-desc {
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 16px;
}

.platform-features {
    list-style: none;
}

.platform-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.8rem;
    color: var(--text);
    border-bottom: 1px solid var(--gray-100);
}

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

.platform-features li::before {
    content: '✓';
    color: var(--secondary);
    font-weight: 700;
}

/* ===== Solution Section - Two Cards Layout ===== */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.solution-card {
    padding: 36px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.solution-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border: none;
}

.solution-card.featured * {
    color: var(--white);
}

.solution-card.accent {
    background: linear-gradient(135deg, var(--accent) 0%, #dc2626 100%);
    border: none;
}

.solution-card.accent * {
    color: var(--white);
}

.solution-card.highlight {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border: none;
}

.solution-card.highlight * {
    color: var(--white);
}

.solution-icon {
    width: 56px;
    height: 56px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 20px;
}

.solution-card.featured .solution-icon,
.solution-card.accent .solution-icon,
.solution-card.highlight .solution-icon {
    background: rgba(255, 255, 255, 0.2);
}

.solution-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.solution-card p {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.7;
}

/* ===== Product Cards (Two Column) ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    padding: 40px;
    border-radius: 16px;
    position: relative;
}

.product-card.primary {
    background: linear-gradient(135deg, #1e3a8a 0%, #3730a3 100%);
}

.product-card.accent {
    background: linear-gradient(135deg, var(--accent) 0%, #b91c1c 100%);
}

.product-card * {
    color: var(--white);
}

.product-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.product-card > p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 24px;
    line-height: 1.6;
}

.product-features {
    list-style: none;
}

.product-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.9rem;
    opacity: 0.95;
}

.product-features li::before {
    content: '•';
    color: var(--white);
    font-weight: bold;
    opacity: 0.7;
}

/* ===== Architecture Section ===== */
.architecture {
    background: var(--dark);
}

.arch-diagram {
    padding: 48px;
    background: var(--dark-card);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow-x: auto;
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    min-width: 800px;
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 24px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-width: 110px;
    transition: all 0.3s ease;
}

.arch-node:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.arch-node.input {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
}

.arch-node.agent {
    background: var(--gradient-primary);
    border: none;
}

.arch-node.output {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
}

.arch-icon {
    font-size: 1.8rem;
}

.arch-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
    text-align: center;
}

.arch-arrow {
    font-size: 1.4rem;
    color: var(--text-light);
}

.arch-loops {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.arch-loop {
    padding: 20px 24px;
    border-radius: 12px;
    border: 2px dashed;
}

.arch-loop.code {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
}

.arch-loop.physics {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.3);
}

.loop-title {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.loop-desc {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-bottom: 12px;
}

.arch-loop.code .loop-title {
    color: var(--primary-light);
}

.arch-loop.physics .loop-title {
    color: var(--secondary);
}

.loop-items {
    display: flex;
    gap: 10px;
}

.loop-items span {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-light);
}

/* ===== Features Section ===== */
.features {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: var(--white);
    border-radius: 14px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.6;
}

.feature-card.highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: 2px solid var(--primary-light);
    position: relative;
    overflow: hidden;
}

.feature-card.highlight::before {
    content: '⭐';
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 1.2rem;
    opacity: 0.6;
}

.feature-card.highlight:hover {
    border-color: var(--primary);
    box-shadow: 0 16px 50px rgba(99, 102, 241, 0.15);
}

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

.applications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.app-card {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--white);
    border-radius: 14px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.app-icon {
    font-size: 2.2rem;
    flex-shrink: 0;
}

.app-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.app-content p {
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 12px;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.app-tags span {
    padding: 4px 10px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Pricing Section ===== */
.pricing {
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    padding: 40px;
    background: var(--white);
    border-radius: 20px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.pricing-card.featured {
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border: none;
}

.pricing-card.featured * {
    color: var(--white);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 8px 18px;
    background: var(--accent);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 100px;
}

.pricing-header {
    margin-bottom: 28px;
}

.pricing-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    opacity: 0.7;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 0.95rem;
    color: var(--text);
    border-bottom: 1px solid var(--gray-100);
}

.pricing-card.featured .pricing-features li {
    border-color: rgba(255, 255, 255, 0.15);
}

.pricing-features li::before {
    content: '✓';
    width: 20px;
    height: 20px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.pricing-card.featured .pricing-features li::before {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.pricing-card .btn {
    width: 100%;
}

.pricing-card.featured .btn-primary {
    background: var(--white);
    color: var(--primary);
}

.pricing-card.featured .btn-primary:hover {
    background: var(--gray-100);
}

/* ===== CTA Section ===== */
.cta {
    background: var(--gradient-cta);
    text-align: center;
}

.cta .section-title {
    color: var(--white);
    margin-bottom: 16px;
}

.cta .section-description {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

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

.cta .btn-primary:hover {
    background: var(--gray-100);
}

.cta .btn-outline {
    border-color: rgba(255, 255, 255, 0.4);
}

/* ===== Footer ===== */
.footer {
    padding: 80px 0 40px;
    background: var(--dark);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white);
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .challenge-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-card.featured {
        grid-column: span 1;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .applications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .arch-flow {
        flex-wrap: wrap;
        min-width: auto;
    }
    
    .arch-loops {
        width: 100%;
        flex-direction: row;
    }
    
    .arch-loop {
        flex: 1;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .logos {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .lang-switch {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
        padding: 32px 20px;
        gap: 20px;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    .challenge-grid,
    .platforms-grid,
    .features-grid,
    .applications-grid,
    .pricing-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .download-info {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .release-content {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        padding: 32px 24px;
    }

    .app-card {
        flex-direction: column;
        text-align: center;
    }
    
    .section {
        padding: 70px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .arch-loops {
        flex-direction: column;
    }
    
    .loop-items {
        flex-wrap: wrap;
    }
    
    .platform-logo {
        padding: 12px 16px;
    }
}

/* ===== Download Section ===== */
.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.download-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
}

.download-os-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: 16px;
}

.download-os-icon svg {
    width: 48px;
    height: 48px;
    color: var(--white);
}

.download-os-icon.linux {
    background: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
}

.download-card h3 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 700;
}

.download-version {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.download-requirements {
    text-align: left;
    background: var(--gray-50);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
}

.requirement-title {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.download-requirements ul {
    list-style: none;
    padding: 0;
}

.download-requirements li {
    padding: 6px 0;
    color: var(--text);
    font-size: 0.9rem;
    position: relative;
    padding-left: 24px;
}

.download-requirements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

.download-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 1.05rem;
    padding: 16px 32px;
}

.btn-icon {
    font-size: 1.2rem;
}

.download-note {
    color: var(--text-light);
    font-size: 0.85rem;
}

/* Download Info Grid */
.download-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 64px;
    padding-top: 48px;
    border-top: 1px solid var(--gray-200);
}

.info-item {
    text-align: center;
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.info-item h4 {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.info-item p {
    color: var(--text);
    font-size: 0.9rem;
}

/* Release Notes */
.release-notes {
    margin-top: 64px;
    background: var(--gray-50);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--gray-200);
}

.release-notes h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 32px;
    font-weight: 700;
}

.release-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.release-column h4 {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: 16px;
    font-weight: 600;
}

.release-column ul {
    list-style: none;
    padding: 0;
}

.release-column li {
    padding: 8px 0;
    color: var(--text);
    font-size: 0.95rem;
    position: relative;
    padding-left: 24px;
}

.release-column li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ===== Animations ===== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}