/* Trakaido Landing Page Styles */

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

:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #6366F1;
    --secondary-color: #10B981;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --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);
    --border-radius: 8px;
}

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

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

/* Navigation */
.navbar {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.nav-brand a {
    text-decoration: none;
    color: var(--primary-color);
}

.nav-brand h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.2s;
}

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

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

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

/* Language Selector */
.language-selector {
    margin: 2rem 0;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.selector-label {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
    opacity: 0.95;
}

.language-flags {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.flag-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.25rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: white;
    transition: all 0.3s;
}

.flag-link:hover {
    background: rgba(255, 255, 255, 0.35);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.flag {
    font-size: 3rem;
    line-height: 1;
}

.flag-label {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
}

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

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

.hero .btn-primary:hover {
    background-color: var(--bg-light);
}

.hero .btn-secondary {
    border-color: white;
    color: white;
}

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

/* Screenshot Placeholder */
.screenshot-placeholder {
    background-color: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-light);
    font-weight: 600;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero .screenshot-placeholder {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.8);
    padding: 0;
    border: none;
    min-height: auto;
}

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

.screenshot-image {
    max-height: 500px;
    width: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

/* Features Preview */
.features-preview {
    background-color: var(--bg-light);
}

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

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

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

/* Languages Section */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.language-card {
    background-color: var(--bg-light);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
}

.language-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

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

.language-card .btn-secondary {
    margin: 0.25rem;
}

.language-card .btn-ios {
    background-color: var(--primary-color);
    color: white;
}

.language-card .btn-ios:hover {
    background-color: var(--primary-dark);
}

/* How It Works */
.how-it-works {
    background-color: var(--bg-light);
}

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

.step {
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 60px;
    margin-bottom: 1rem;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.step p {
    color: var(--text-light);
}

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

.cta-section h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-language-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.cta-language-links .btn-primary {
    background-color: white;
    color: var(--primary-color);
    min-width: 160px;
}

.cta-language-links .btn-primary:hover {
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

.cta-note {
    font-size: 0.875rem;
    margin-top: 1rem;
    opacity: 0.85;
}

/* Educators Section */
.educators-section {
    background-color: var(--bg-white);
}

.educators-section .section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.educator-cta {
    text-align: center;
    margin-top: 4rem;
    padding: 3rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--border-radius);
}

.educator-cta h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.educator-cta p {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.educator-cta .btn-primary {
    font-size: 1.125rem;
}

/* Coming Soon Badge */
.coming-soon {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    vertical-align: middle;
    white-space: nowrap;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* Feature Detail Pages */
.feature-detail {
    padding: 4rem 0;
}

.feature-detail.alternate {
    background-color: var(--bg-light);
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.feature-text h2 {
    text-align: left;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

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

.feature-text ul {
    list-style: none;
    margin-top: 1.5rem;
}

.feature-text li {
    color: var(--text-light);
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
}

.feature-text li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.feature-text strong {
    color: var(--text-dark);
    font-weight: 600;
}

.feature-screenshot {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Privacy Content */
.privacy-content {
    padding: 3rem 0;
}

.content-section {
    margin-bottom: 3rem;
}

.content-section h2 {
    font-size: 1.75rem;
    text-align: left;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.content-section h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

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

.content-section ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-section li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.content-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.content-section a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: 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 h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: white;
}

.footer-section p {
    color: #9CA3AF;
    line-height: 1.6;
}

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

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

.footer-section a {
    color: #9CA3AF;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1.5rem;
    text-align: center;
    color: #9CA3AF;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

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

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

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

    .flag {
        font-size: 2.5rem;
    }

    .flag-label {
        font-size: 0.875rem;
    }

    .cta-language-links {
        flex-direction: column;
        align-items: center;
    }

    .cta-language-links .btn-primary {
        width: 100%;
        max-width: 300px;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .feature-row {
        grid-template-columns: 1fr;
    }

    .feature-detail .feature-row {
        grid-template-columns: 1fr;
    }

    .feature-detail.alternate .feature-row {
        grid-template-columns: 1fr;
    }

    .feature-detail.alternate .feature-screenshot {
        order: 1;
    }

    .feature-detail.alternate .feature-text {
        order: 2;
    }

    section h2 {
        font-size: 1.75rem;
    }

    .page-header h1 {
        font-size: 1.75rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

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

    .educator-cta {
        padding: 2rem;
    }

    .educator-cta h3 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .hero-cta a {
        width: 100%;
        text-align: center;
    }
}