/* ========================================
   Outline Secure Access Landing Page - Main Styles
   ======================================== */

/* === CSS Variables === */
:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #8b5cf6;
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --text-dark: #0f172a;
    --text-light: #64748b;
    --text-white: #ffffff;
    --border-color: #e2e8f0;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #f8fafc;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

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

/* === Container === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === Header & Navigation === */
.header {
    background-color: var(--text-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: inherit;
}

.logo-icon {
    font-size: 2rem;
}

.logo-accent {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* === Hero Section === */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-white);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.highlight {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.8;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.feature-badge {
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
}

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

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-note {
    margin-top: 1rem;
    opacity: 0.85;
    font-size: 0.95rem;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.illustration-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
}

.circle-1 {
    width: 400px;
    height: 400px;
    animation: float 6s ease-in-out infinite;
}

.circle-2 {
    width: 300px;
    height: 300px;
    animation: float 8s ease-in-out infinite reverse;
}

.circle-3 {
    width: 200px;
    height: 200px;
    animation: float 10s ease-in-out infinite;
}

.illustration-content {
    position: relative;
    z-index: 1;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-radius: 40px;
    padding: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background: #0f172a;
    border-radius: 20px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.secure access-status {
    text-align: center;
}

.status-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s ease-in-out infinite;
}

.status-text {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.status-location {
    font-size: 1rem;
    opacity: 0.9;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: var(--text-white);
}

.btn-secondary {
    background-color: var(--text-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-pulse {
    animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7); }
    50% { box-shadow: 0 0 0 15px rgba(59, 130, 246, 0); }
}

.btn-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
    transform: translateX(5px);
}

/* === Sections === */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.page-hero {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
    padding: 4rem 0;
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.page-hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* === Benefits Section === */
.benefits {
    background-color: var(--text-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.benefit-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* === How It Works === */
.how-it-works {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.steps {
    display: grid;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    flex-shrink: 0;
    box-shadow: var(--shadow-lg);
}

.step-content h3 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.step-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.step-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
    transition: all 0.3s ease;
}

.step-link:hover {
    gap: 0.75rem;
}

/* === CTA Section === */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-white);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* === FAQ Preview === */
.faq-preview {
    background-color: var(--text-white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto 2rem;
}

.faq-item {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.faq-question {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
    cursor: pointer;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    color: var(--text-light);
    line-height: 1.7;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    margin-top: 0.75rem;
}

.faq-more {
    text-align: center;
}

/* === Footer === */
.footer {
    background-color: var(--dark-bg);
    color: var(--text-white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-light);
    line-height: 1.7;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-light);
    transition: color 0.3s ease;
}

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

.footer-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: var(--text-white);
    border-radius: 8px;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s ease;
}

.footer-cta:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: var(--text-light);
}

.footer-note {
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

/* === Download Page === */
.download-section {
    background-color: #f8fafc;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.download-card {
    background-color: var(--text-white);
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.download-icon {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.download-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.download-info {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.download-note {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Installation Section */
.installation-section {
    background-color: var(--text-white);
}

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

.tab-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background-color: #f1f5f9;
    border: 2px solid transparent;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.install-steps {
    display: grid;
    gap: 2rem;
}

.install-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    background-color: #f8fafc;
    border-radius: 12px;
}

.install-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.install-text h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.install-text p,
.install-text ol {
    color: var(--text-light);
    line-height: 1.7;
}

.install-text ol {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.install-text ol li {
    margin-bottom: 0.5rem;
}

.step-note {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: #dbeafe;
    border-left: 3px solid var(--primary-color);
    border-radius: 4px;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.step-success {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: #d1fae5;
    border-left: 3px solid var(--secondary-color);
    border-radius: 4px;
    font-weight: 600;
    color: var(--text-dark);
}

/* System Requirements */
.requirements-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.requirement-card {
    background-color: var(--text-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.requirement-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.requirement-card ul {
    list-style: none;
}

.requirement-card li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.requirement-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

/* Keys Page */
.get-key-section {
    background-color: #f8fafc;
}

.key-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 3rem;
}

.key-card {
    background-color: var(--text-white);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.key-card.featured {
    border: 2px solid var(--primary-color);
}

.key-card-header {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
    padding: 2rem;
    text-align: center;
}

.key-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.key-card-header h2 {
    font-size: 2rem;
    font-weight: 800;
}

.key-card-body {
    padding: 2rem;
}

.key-description {
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.key-benefits {
    margin-bottom: 2rem;
}

.key-benefit {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
}

.check-icon {
    color: var(--secondary-color);
    font-size: 1.25rem;
    font-weight: 700;
}

.key-cta {
    margin-bottom: 1.5rem;
}

.key-note {
    background-color: #f1f5f9;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-light);
    display: flex;
    gap: 0.5rem;
}

.info-icon {
    flex-shrink: 0;
}

/* Usage Steps */
.usage-steps {
    margin-top: 3rem;
}

.usage-steps h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.step-card {
    background-color: var(--text-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.step-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.step-card h3 {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.step-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.step-card code {
    background-color: #f1f5f9;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Sidebar */
.key-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-card {
    background-color: var(--text-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.sidebar-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.sidebar-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.sidebar-card.stats {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
}

.sidebar-card.stats h3 {
    color: var(--text-white);
}

.stat-item {
    text-align: center;
    padding: 1rem 0;
}

.stat-item:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Key Info Section */
.key-info-section {
    background-color: var(--text-white);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.info-card {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.info-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.info-card p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.code-example {
    background-color: var(--dark-bg);
    color: #10b981;
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    word-break: break-all;
    margin-top: 1rem;
}

code {
    background-color: #f1f5f9;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--accent-color);
}

.code-block {
    background-color: var(--dark-bg);
    color: #10b981;
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    margin: 1rem 0;
    overflow-x: auto;
}

/* Instructions Page */
.quick-start {
    background-color: var(--text-white);
}

.quick-start-card {
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    color: var(--text-white);
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
}

.quick-start-card h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.quick-steps {
    display: grid;
    gap: 1.5rem;
}

.quick-step {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: left;
}

.quick-number {
    width: 50px;
    height: 50px;
    background-color: var(--text-white);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.quick-text {
    flex: 1;
    font-size: 1.125rem;
}

.quick-text a {
    color: var(--text-white);
    text-decoration: underline;
}

/* Guides Section */
.guides-section {
    background-color: #f8fafc;
}

.guide-block {
    background-color: var(--text-white);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    overflow: hidden;
}

.guide-header {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.guide-icon {
    font-size: 3rem;
}

.guide-header h3 {
    font-size: 2rem;
    color: var(--text-dark);
}

.guide-content {
    padding: 2rem;
}

.guide-steps {
    display: grid;
    gap: 2rem;
}

.guide-step {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.guide-step:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.guide-step h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.guide-step p,
.guide-step ol {
    color: var(--text-light);
    line-height: 1.7;
}

.guide-step ol {
    margin: 1rem 0 1rem 1.5rem;
}

.guide-step li {
    margin-bottom: 0.5rem;
}

/* Troubleshooting */
.troubleshooting {
    background-color: var(--text-white);
}

.troubleshoot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.troubleshoot-card {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.troubleshoot-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-size: 1.25rem;
}

.troubleshoot-card ul {
    list-style: none;
}

.troubleshoot-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    color: var(--text-light);
    position: relative;
}

.troubleshoot-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Tips Section */
.tips-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tip-card {
    background-color: var(--text-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.tip-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tip-card h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.tip-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* FAQ Page */
.faq-section {
    background-color: #f8fafc;
}

.faq-categories {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    justify-content: center;
}

.faq-category {
    padding: 0.75rem 1.5rem;
    background-color: var(--text-white);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-category.active,
.faq-category:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
}

.faq-category-content {
    display: none;
}

.faq-category-content.active {
    display: block;
}

.faq-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

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

.faq-accordion .faq-item {
    background-color: var(--text-white);
    margin-bottom: 1rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.faq-accordion .faq-question {
    padding: 1.5rem;
    font-size: 1.125rem;
}

.faq-accordion .faq-answer {
    padding: 0 1.5rem 1.5rem;
}

.faq-accordion .faq-answer ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.faq-accordion .faq-answer li {
    margin-bottom: 0.5rem;
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        flex-direction: column;
        background-color: var(--text-white);
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .nav-menu a {
        display: block;
        padding: 1rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-illustration {
        height: 400px;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .circle-1 { width: 300px; height: 300px; }
    .circle-2 { width: 200px; height: 200px; }
    .circle-3 { width: 150px; height: 150px; }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-hero h1 {
        font-size: 2rem;
    }
    
    .step {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin: 0 auto;
    }
    
    .step-content {
        text-align: center;
    }
    
    .key-content {
        grid-template-columns: 1fr;
    }
    
    .key-sidebar {
        order: -1;
    }
    
    .install-step {
        grid-template-columns: 1fr;
    }
    
    .install-number {
        margin: 0 auto;
    }
    
    .guide-step {
        padding-bottom: 1.5rem;
    }
    
    .btn-large {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-illustration {
        height: 300px;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .benefit-card,
    .download-card,
    .sidebar-card,
    .info-card,
    .troubleshoot-card,
    .tip-card {
        padding: 1.5rem;
    }
}