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

:root {
    --primary-color: #ed702d;
    --secondary-color: #7c3aed;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --text-dark: #1f2937;
    --text-medium: #4b5563;
    --text-light: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.version {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #ed702d 0%, #2153cc 100%);
    padding: 4rem 0;
    text-align: center;
    color: white;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    opacity: 1;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

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

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

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

.btn-download {
    background: white;
    color: var(--primary-color);
    font-size: 1.05rem;
    padding: 1rem 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 10px;
    font-weight: 700;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    background: #f8f9fa;
}

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

/* Sections */
.section {
    padding: 4rem 0;
}

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

.section-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-medium);
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

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

/* Tutorial Steps */
.tutorial-steps {
    max-width: 900px;
    margin: 0 auto;
}

.tutorial-step {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.step-number {
    width: 50px;
    height: 50px;
    background: white;
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.step-content {
    padding: 2rem;
}

.step-text h4 {
    font-size: 1.25rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.step-text ul {
    list-style-position: inside;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
}

.step-text li {
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

.info-box {
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin-top: 1.5rem;
}

.info-box.success {
    background: #f0fdf4;
    border-left-color: var(--success-color);
}

.info-box strong {
    color: var(--primary-color);
}

.info-box.success strong {
    color: var(--success-color);
}

/* Process Flow */
.process-flow {
    margin-top: 4rem;
    padding: 3rem;
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.process-flow h3 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

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

.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.flow-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    min-width: 120px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.flow-item:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.flow-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.flow-item p {
    font-size: 0.875rem;
    color: var(--text-medium);
    font-weight: 500;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* Screenshots */
.screenshots-category {
    margin-bottom: 4rem;
}

.category-title {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
    text-align: center;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.screenshot-card {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.screenshot-card a {
    display: block;
    text-decoration: none;
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-label {
    padding: 1rem;
    text-align: center;
    color: var(--text-medium);
    font-weight: 500;
    background: var(--bg-light);
}

/* Download Section */
.download-section-wrapper {
    margin-bottom: 4rem;
}

.download-category-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    color: white;
    margin-bottom: 2rem;
}

.download-grid-single {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.download-grid-triple {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.download-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    border-color: white;
}

.download-card.featured {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    border: 3px solid white;
    box-shadow: 0 12px 32px rgba(79, 70, 229, 0.2);
}

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

.download-card h3 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.download-card p {
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.download-version {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--text-light);
    font-style: italic;
}

.requirements {
    margin-top: 4rem;
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.requirements h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-dark);
    font-weight: 700;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

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

.requirement-item h4 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.requirement-item ul {
    list-style-position: inside;
    color: var(--text-dark);
}

.requirement-item li {
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
}

/* Privacy Policy */
.privacy-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.privacy-intro {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--text-medium);
}

.privacy-section {
    margin-bottom: 2.5rem;
}

.privacy-section h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.privacy-section p {
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.privacy-section ul {
    list-style-position: outside;
    padding-left: 2rem;
    color: var(--text-medium);
}

.privacy-section li {
    margin-bottom: 0.75rem;
    line-height: 1.7;
}

.privacy-section ul ul {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
}

.privacy-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
    color: var(--text-medium);
}

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

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

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* Animations */
.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll reveal is now optional - content visible by default */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal.animated {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

.scroll-reveal.animated.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

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

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

    .features-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .flow-diagram {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .download-grid-triple {
        grid-template-columns: 1fr;
    }

    .download-category-title {
        font-size: 1.75rem;
    }

    .privacy-content {
        padding: 2rem 1.5rem;
    }

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

    .requirements-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .step-header {
        flex-direction: column;
        text-align: center;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
    }

    .download-card {
        padding: 2rem 1.5rem;
    }
}