/* Design Tokens - Atlassian Design System Inspired */
:root {
    /* Color tokens */
    --color-primary: #2563EB;
    --color-primary-hover: #1d4ed8;
    --color-accent: #10B981;
    --color-accent-hover: #059669;
    --color-text-primary: #172B4D;
    --color-text-secondary: #5E6C84;
    --color-background-white: #FFFFFF;
    --color-background-subtle: #F8FAFC;
    --color-border-light: #E2E8F0;
    --color-success: #10B981;
    --color-error: #DC2626;
    --color-nav-bg: rgba(255, 255, 255, 0.95);

    /* Space tokens (8px base unit) */
    --space-050: 4px;
    --space-100: 8px;
    --space-150: 12px;
    --space-200: 16px;
    --space-250: 20px;
    --space-300: 24px;
    --space-400: 32px;
    --space-500: 40px;
    --space-600: 48px;
    --space-700: 56px;
    --space-800: 64px;
    --space-1000: 80px;

    /* Typography tokens */
    --font-family-base: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-hero: 64px;
    --font-size-h2: 48px;
    --font-size-h3: 32px;
    --font-size-h4: 24px;
    --font-size-body-large: 20px;
    --font-size-body: 18px;
    --font-size-body-small: 16px;
    --font-size-caption: 14px;

    /* Border radius */
    --radius-medium: 8px;
    --radius-large: 12px;

    /* Shadows */
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
    padding-top: 72px;
}

/* Container system */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--space-600);
}

.container-narrow {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-600);
}

/* Section spacing */
section {
    padding: var(--space-1000) 0;
}

.section-alternate {
    background-color: var(--color-background-subtle);
}

/* Typography components */
.heading-hero {
    font-size: var(--font-size-hero);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-300);
}

/* Japanese language adjustments */
html[lang="ja"] .heading-hero {
    font-size: 52px;
}

.heading-h2 {
    font-size: var(--font-size-h2);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-300);
}

.heading-h3 {
    font-size: var(--font-size-h3);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: var(--space-200);
}

.heading-h4 {
    font-size: var(--font-size-h4);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text-primary);
    margin-bottom: var(--space-150);
}

.body-large {
    font-size: var(--font-size-body-large);
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 65ch;
}

.body-text {
    font-size: var(--font-size-body);
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* Button components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-200) var(--space-400);
    font-size: var(--font-size-body);
    font-weight: 600;
    font-family: var(--font-family-base);
    border-radius: var(--radius-medium);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    gap: var(--space-100);
    min-height: 44px; /* Touch-friendly minimum */
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

@media (hover: none) {
    .btn-primary:hover {
        transform: none;
    }
}

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

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

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

.btn-accent:hover {
    background-color: var(--color-accent-hover);
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: var(--space-800) 0 0 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-800);
    align-items: center;
}

.hero-text {
    padding-right: var(--space-600);
}

.hero-cta {
    display: flex;
    gap: var(--space-200);
    margin-top: var(--space-500);
    flex-wrap: wrap;
}

.trust-badges {
    display: flex;
    gap: var(--space-300);
    margin-top: var(--space-400);
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-100);
    padding: var(--space-100) var(--space-200);
    background-color: var(--color-background-subtle);
    border-radius: var(--radius-medium);
    font-size: var(--font-size-caption);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.badge-icon {
    width: 16px;
    height: 16px;
    color: var(--color-success);
}

/* Abstract geometric visual */
.hero-visual {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden; /* Prevent shapes from overflowing */
}

/* Hero visual now uses inline SVG */

/* Supported Platforms Section */
.platforms-section {
    background-color: var(--color-background-white);
    padding: 0 0 var(--space-600) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.platforms-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-400);
}

.platforms-label {
    font-size: var(--font-size-body-small);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-600);
    align-items: center;
    justify-items: center;
    max-width: 800px;
}

.platform-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-150);
    opacity: 0.9;
    transition: opacity 0.2s ease;
}

.platform-item:hover {
    opacity: 1;
}

.platform-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background-subtle);
    border-radius: var(--radius-large);
    border: 1px solid var(--color-border-light);
}

.platform-icon svg {
    width: 32px;
    height: 32px;
}

.platform-name {
    font-size: var(--font-size-caption);
    font-weight: 500;
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-400);
    }

    .platforms-section {
        padding: 0 0 var(--space-500) 0;
    }
}

@media (max-width: 480px) {
    .platforms-grid {
        gap: var(--space-300);
    }

    .platform-icon {
        width: 48px;
        height: 48px;
    }

    .platform-icon svg {
        width: 28px;
        height: 28px;
    }
}

/* How It Works Section */
.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-600);
    margin-top: var(--space-600);
}

.step {
    text-align: center;
    padding: var(--space-400);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border-radius: 50%;
    font-size: var(--font-size-h4);
    font-weight: 700;
    margin-bottom: var(--space-300);
}

.step-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-300);
    background: var(--color-background-subtle);
    border-radius: var(--radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-primary);
    stroke-width: 1.5px;
    fill: none;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-400);
    margin-top: var(--space-600);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.feature-card {
    background-color: white;
    padding: var(--space-400);
    border-radius: var(--radius-large);
    border: 1px solid var(--color-border-light);
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

@media (hover: none) {
    .feature-card:hover {
        transform: none;
    }

    .feature-card:active {
        box-shadow: var(--shadow-medium);
    }
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-200);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
    stroke-width: 1.5px;
    fill: none;
}

.feature-title {
    font-size: var(--font-size-body-large);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-100);
}

.feature-description {
    font-size: var(--font-size-body-small);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-600);
    margin-top: var(--space-600);
}

.use-case-card {
    background-color: white;
    padding: var(--space-600);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
}

.use-case-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-300);
}

.use-case-icon svg {
    width: 36px;
    height: 36px;
    stroke: white;
    stroke-width: 1.5px;
    fill: none;
}

.use-case-examples {
    list-style: none;
    margin-top: var(--space-300);
}

.use-case-examples li {
    padding: var(--space-150) 0;
    padding-left: var(--space-400);
    position: relative;
    color: var(--color-text-secondary);
}

.use-case-examples li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-500);
    margin-top: var(--space-600);
    margin-bottom: var(--space-500);
}

.pricing-card {
    background-color: white;
    padding: var(--space-600);
    border-radius: var(--radius-large);
    border: 2px solid var(--color-border-light);
    transition: all 0.3s ease;
}

.pricing-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-large);
}

.pricing-header {
    margin-bottom: var(--space-400);
}

.pricing-title {
    font-size: var(--font-size-h3);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-150);
}

.pricing-items {
    list-style: none;
}

.pricing-items li {
    padding: var(--space-150) 0;
    color: var(--color-text-secondary);
    display: flex;
    align-items: flex-start;
    gap: var(--space-100);
}

.pricing-items li:before {
    content: "✓";
    color: var(--color-success);
    font-weight: 700;
    flex-shrink: 0;
}

.free-trial {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: var(--space-400);
    border-radius: var(--radius-large);
    text-align: center;
    margin-top: var(--space-500);
}

.free-trial-title {
    font-size: var(--font-size-h4);
    font-weight: 700;
    margin-bottom: var(--space-150);
}

.free-trial-text {
    font-size: var(--font-size-body);
    opacity: 0.95;
}

/* Contact Form */
.contact-section-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-800);
    align-items: start;
}

.form-container {
    background-color: white;
    padding: var(--space-600);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
}

.form-group {
    margin-bottom: var(--space-300);
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-100);
    color: var(--color-text-primary);
    font-size: var(--font-size-body-small);
}

input[type="text"],
input[type="email"],
input:not([type]),
textarea {
    width: 100%;
    padding: var(--space-150) var(--space-200);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-medium);
    font-size: var(--font-size-body);
    font-family: var(--font-family-base);
    transition: border-color 0.2s ease;
    min-height: 44px; /* Touch-friendly */
    -webkit-appearance: none; /* Remove iOS styling */
    appearance: none;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

textarea {
    min-height: 120px;
    resize: vertical;
}

@media (max-width: 768px) {
    textarea {
        min-height: 100px;
    }
}

.form-reassurance {
    background-color: var(--color-background-subtle);
    padding: var(--space-500);
    border-radius: var(--radius-large);
    border-left: 4px solid var(--color-accent);
}

.reassurance-title {
    font-size: var(--font-size-body-large);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-200);
}

.reassurance-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Success and Error Messages */
.success-message {
    background-color: #D1FAE5;
    color: #065F46;
    padding: var(--space-300);
    border-radius: var(--radius-medium);
    margin-bottom: var(--space-300);
    text-align: center;
    font-weight: 500;
}

.error-message {
    background-color: #FEE2E2;
    color: #991B1B;
    padding: var(--space-300);
    border-radius: var(--radius-medium);
    margin-bottom: var(--space-300);
    text-align: center;
    font-weight: 500;
}

/* FAQ Section */
.faq-grid {
    display: grid;
    gap: var(--space-300);
    margin-top: var(--space-600);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.faq-item {
    background-color: white;
    padding: var(--space-400);
    border-radius: var(--radius-large);
    border: 1px solid var(--color-border-light);
}

.faq-question {
    font-size: var(--font-size-body-large);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-150);
}

.faq-answer {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background-color: var(--color-text-primary);
    color: white;
    padding: var(--space-600) 0;
}

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

.footer-links {
    display: flex;
    gap: var(--space-400);
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.footer-links a:hover {
    opacity: 1;
}

/* Text alignment */
.text-center {
    text-align: center;
}

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    padding: var(--space-200) 0;
}

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

.logo {
    font-size: var(--font-size-h4);
    font-weight: 700;
    color: var(--color-text-primary);
}

.language-switcher {
    display: flex;
    align-items: center;
    gap: var(--space-100);
    background-color: var(--color-background-subtle);
    padding: var(--space-050) var(--space-100);
    border-radius: var(--radius-medium);
    border: 1px solid var(--color-border-light);
}

.lang-btn {
    padding: var(--space-050) var(--space-150);
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: var(--font-size-body-small);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: 4px;
    transition: all 0.2s ease;
    font-family: var(--font-family-base);
}

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

.lang-btn:hover:not(.active) {
    background-color: white;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content,
    .use-cases-grid,
    .contact-section-content {
        grid-template-columns: 1fr;
        gap: var(--space-500);
    }

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

    .hero-visual {
        height: 400px;
        order: -1;
    }

    .hero-text {
        padding-right: 0;
    }

    .heading-hero {
        font-size: 48px;
    }

    html[lang="ja"] .heading-hero {
        font-size: 42px;
    }

    .heading-h2 {
        font-size: 36px;
    }

    .heading-h3 {
        font-size: 28px;
    }

    .steps-container {
        grid-template-columns: 1fr;
        gap: var(--space-400);
    }
}

@media (max-width: 768px) {
    .container,
    .container-narrow {
        padding: 0 var(--space-300);
    }

    section {
        padding: var(--space-600) 0;
    }

    .hero {
        min-height: auto;
        padding: var(--space-500) 0 0 0;
    }

    .hero-visual {
        height: 300px;
    }

    .heading-hero {
        font-size: 36px;
    }

    html[lang="ja"] .heading-hero {
        font-size: 32px;
    }

    .heading-h2 {
        font-size: 28px;
    }

    .heading-h3 {
        font-size: 24px;
    }

    .heading-h4 {
        font-size: 20px;
    }

    .body-large {
        font-size: var(--font-size-body);
    }

    .body-text {
        font-size: var(--font-size-body-small);
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .trust-badges {
        flex-direction: column;
        gap: var(--space-150);
    }

    .steps-container {
        gap: var(--space-500);
    }

    .step {
        padding: var(--space-300);
    }

    .step-number {
        width: 48px;
        height: 48px;
        font-size: var(--font-size-body-large);
    }

    .step-icon {
        width: 56px;
        height: 56px;
    }

    .step-icon svg {
        width: 28px;
        height: 28px;
    }

    .features-grid {
        gap: var(--space-300);
    }

    .feature-card {
        padding: var(--space-300);
    }

    .use-case-card {
        padding: var(--space-400);
    }

    .use-case-icon {
        width: 56px;
        height: 56px;
    }

    .use-case-icon svg {
        width: 28px;
        height: 28px;
    }

    .form-container {
        padding: var(--space-400);
    }

    .form-reassurance {
        padding: var(--space-400);
    }

    .faq-item {
        padding: var(--space-300);
    }

    .faq-question {
        font-size: var(--font-size-body);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-300);
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .navbar-content {
        gap: var(--space-200);
    }

    .logo {
        font-size: var(--font-size-body-large);
    }
}

@media (max-width: 480px) {
    body {
        padding-top: 64px;
    }

    .navbar {
        padding: var(--space-150) 0;
    }

    .container,
    .container-narrow {
        padding: 0 var(--space-200);
    }

    section {
        padding: var(--space-500) 0;
    }

    .heading-hero {
        font-size: 28px;
        line-height: 1.2;
    }

    html[lang="ja"] .heading-hero {
        font-size: 26px;
    }

    .heading-h2 {
        font-size: 24px;
        line-height: 1.2;
    }

    .heading-h3 {
        font-size: 20px;
    }

    .hero-visual {
        height: 250px;
    }

    .btn {
        padding: var(--space-150) var(--space-300);
        font-size: var(--font-size-body-small);
    }

    .language-switcher {
        padding: var(--space-050) var(--space-100);
    }

    .lang-btn {
        padding: var(--space-050) var(--space-100);
        font-size: 13px;
    }

    .step,
    .feature-card,
    .use-case-card,
    .form-container,
    .form-reassurance,
    .faq-item {
        padding: var(--space-250);
    }

    .feature-icon,
    .use-case-icon {
        width: 40px;
        height: 40px;
    }

    .feature-icon svg {
        width: 20px;
        height: 20px;
    }

    .use-case-icon svg {
        width: 24px;
        height: 24px;
    }

    input[type="text"],
    input[type="email"],
    input:not([type]),
    textarea {
        font-size: var(--font-size-body-small);
    }

    .footer {
        padding: var(--space-400) 0;
    }
}