/* ==========================================
   CSS Reset & Variables
   ========================================== */

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

:root {
    /* Colors */
    --color-primary: #1E3A8A;      /* Deep Blue */
    --color-primary-light: #3B82F6; /* Blue */
    --color-accent: #F97316;        /* Orange */
    --color-text-dark: #1F2937;     /* Dark Gray */
    --color-text-light: #6B7280;    /* Gray */
    --color-bg-light: #F9FAFB;      /* Light Gray */
    --color-white: #FFFFFF;
    --color-bg-yellow: #FAD604;        /* Yellow */
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Yu Gothic", sans-serif;
    --font-size-hero: 3.5rem;
    --font-size-h2: 2.5rem;
    --font-size-h3: 1.5rem;
    --font-size-body: 1.125rem;
    --font-size-small: 0.875rem;
    
    /* Spacing */
    --section-padding: 8rem 0;
    --container-max-width: 1200px;
    
    /* Effects */
    --transition: all 0.3s ease;
}

/* ==========================================
   Base Styles
   ========================================== */

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    line-height: 1.8;
    color: var(--color-text-dark);
    background-color: var(--color-white);
}

picture, img {
    display: block;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--section-padding);
    position: relative;
}


.section-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-light);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5rem;
    color: var(--color-text-dark);
}

.section-subtitle {
    font-size: var(--font-size-h3);
    font-weight: 300;
    color: var(--color-text-light);
    margin-bottom: 3rem;
    letter-spacing: 0.05em;
}

/* ==========================================
   Section 00: Hero
   ========================================== */

.hero {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
}

.hero-cta {
    position: relative;
    z-index: 10;
    display: inline-block;
    margin-top: -150px;
    margin-bottom: 3rem;
    padding: 1.25rem 3.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-accent);
    border: none;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

.hero-cta:hover {
    background-color: #EA580C;
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(249, 115, 22, 0.6);
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-accent);
    border: none;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.cta-button:hover {
    background-color: #EA580C;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(249, 115, 22, 0.3);
}

/* ==========================================
   Section 01: Problem
   ========================================== */

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

.problem-list {
    max-width: 800px;
    margin: 0 auto;
}

.problem-item {
    margin-bottom: 3rem;
}

.problem-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text-dark);
}

.problem-highlight {
    font-size: 1.5rem;
    font-weight: 700;
}

.highlight-text {
    background-image: linear-gradient(transparent 60%, #FEF08A 60%);
    background-size: 0% 100%;
    background-position: left;
    background-repeat: no-repeat;
    font-weight: 700;
    padding: 0.25rem 0;
    animation: highlight-slide 5s ease-out forwards;
}

@keyframes highlight-slide {
    0% {
        background-size: 0% 100%;
    }
    100% {
        background-size: 100% 100%;
    }
}

.code-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.code-wrong,
.code-right {
    padding: 1.5rem;
    border-radius: 0.5rem;
    text-align: center;
}

.code-wrong {
    background-color: #FEE2E2;
    border: 2px solid #DC2626;
}

.code-wrong .label {
    display: block;
    font-size: 0.875rem;
    color: #DC2626;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.code-wrong code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 1.125rem;
    color: #DC2626;
    background: none;
    padding: 0;
}

.code-right {
    background-color: #D1FAE5;
    border: 2px solid #059669;
}

.code-right .label {
    display: block;
    font-size: 0.875rem;
    color: #059669;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.code-right code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 1.125rem;
    color: #059669;
    background: none;
    padding: 0;
}

/* ==========================================
   Section 02: Solution
   ========================================== */

.solution {
    background-color: var(--color-bg-yellow);
}

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

.value-card {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.value-icon {
    font-size: 3rem;
    color: var(--color-primary-light);
    margin-bottom: 1rem;
}

.value-label {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-light);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.value-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text-dark);
}

.value-description {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

/* ==========================================
   Section 03: Demo
   ========================================== */

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

.video-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background-color: var(--color-bg-light);
    border-radius: 0.5rem;
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 0.5rem;
}

/* ==========================================
   Section 04: Numbers
   ========================================== */

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

.numbers .section-number {
    color: var(--color-primary-light);
}

.numbers .section-title,
.numbers .section-subtitle {
    color: var(--color-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
    text-align: center;
}

.stat-number {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.25rem;
    opacity: 0.9;
}

.stat-tech {
    grid-column: 1 / -1;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.tech-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 1.5rem;
    font-size: 1rem;
    font-weight: 500;
}

/* ==========================================
   Section 05: Comparison
   ========================================== */

.comparison {
    background-color: var(--color-bg-light);
}

.mobile-br {
    display: none;
}

.comparison-cards {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}

.comparison-card {
    background-color: var(--color-white);
    padding: 3rem 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.comparison-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.card-old {
    border: 3px solid #1F2937;
}

.card-new {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 3px solid var(--color-primary);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

.typefit-logo {
    width: 200px;
    height: auto;
    margin: 0 auto 2rem;
    display: block;
    background-color: #fff;
    padding: 1%;
}

.card-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.card-list li {
    font-size: 1.125rem;
    line-height: 2;
    padding-left: 1.5rem;
    position: relative;
}

.card-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    font-weight: 700;
}

.card-old .card-list li::before {
    color: var(--color-text-dark);
}

.card-new .card-list li::before {
    color: var(--color-white);
}

.comparison-arrow-large {
    font-size: 3rem;
    color: var(--color-primary-light);
    font-weight: 700;
    text-align: center;
    animation: arrow-pulse 1.5s ease-in-out infinite;
}

@keyframes arrow-pulse {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(5px); }
}

/* ==========================================
   Section 06: Flow
   ========================================== */

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

.flow-steps {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}

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

.flow-icon {
    font-size: 3rem;
    color: var(--color-primary-light);
    margin-bottom: 1rem;
}

.step-number {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-primary-light);
    border-radius: 50%;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-dark);
}

.flow-arrow {
    font-size: 2.5rem;
    color: var(--color-primary-light);
    font-weight: 700;
    text-align: center;
}

/* ==========================================
   Section 07: Contact
   ========================================== */

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

.contact .section-number {
    color: var(--color-primary-light);
}

.contact .section-title,
.contact .section-subtitle {
    color: var(--color-white);
}

.contact-lead {
    max-width: 700px;
    margin: 0 auto 3rem;
    text-align: center;
    color: var(--color-white);
    opacity: 0.9;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--color-white);
    padding: 3rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text-dark);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    border: 2px solid #E5E7EB;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary-light);
}

.submit-button {
    width: 100%;
    padding: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-accent);
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:hover {
    background-color: #EA580C;
    transform: translateY(-2px);
}

/* ==========================================
   Footer
   ========================================== */

.footer {
    padding: 2rem 0;
    text-align: center;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-top: solid;
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 768px) {
    :root {
        --font-size-hero: 2rem;
        --font-size-h2: 1.75rem;
        --font-size-h3: 1.25rem;
        --section-padding: 3rem 0;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .hero-cta {
        margin-top: -180px;
        margin-bottom: 1.5rem;
        padding: 1rem 2.5rem;
        font-size: 1.125rem;
    }
    
    .section-title {
        margin-bottom: 0.5rem;
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        margin-bottom: 2rem;
        font-size: 1rem;
    }
    
    /* Problem Section */
    .problem-item {
        margin-bottom: 2rem;
    }
    
    .problem-text {
        font-size: 1.125rem;
    }
    
    .problem-highlight {
        font-size: 1.25rem;
    }
    
    .code-comparison {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .code-wrong,
    .code-right {
        padding: 1rem;
    }
    
    .code-wrong .label,
    .code-right .label {
        font-size: 0.75rem;
        margin-bottom: 0.5rem;
    }
    
    .code-wrong code,
    .code-right code {
        font-size: 0.875rem;
        word-break: break-all;
    }
    
    /* Solution Section */
    .value-grid {
        gap: 1.5rem;
        margin-top: 2rem;
    }
    
    .value-card {
        padding: 2rem 1.5rem;
    }
    
    .value-icon {
        font-size: 2.5rem;
        margin-bottom: 0.75rem;
    }
    
    .value-title {
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .value-description {
        font-size: 0.9375rem;
    }
    
    /* Numbers Section */
    .stats-grid {
        gap: 2rem;
        margin-top: 2rem;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .stat-label {
        font-size: 1.125rem;
    }
    
    .tech-badges {
        gap: 0.5rem;
    }
    
    .tech-badge {
        padding: 0.4rem 1rem;
        font-size: 0.875rem;
    }
    
    /* Comparison Section */
    .comparison-cards {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    .comparison-card {
        padding: 1.5rem 1rem;
    }
    
    .typefit-logo {
        width: 140px;
        margin-bottom: 1rem;
    }
    
    .card-title {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .card-list li {
        font-size: 0.875rem;
        line-height: 1.6;
        padding-left: 1.25rem;
    }
    
    .comparison-arrow-large {
        display: none;
    }
    
    /* Mobile-only line break */
    .mobile-br {
        display: inline;
    }
    
    /* Flow Section */
    .flow-steps {
        grid-template-columns: 1fr auto 1fr auto 1fr;
        gap: 0.5rem;
        align-items: start;
    }
    
    .flow-step {
        margin-bottom: 0;
    }
    
    .flow-icon {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }
    
    .step-number {
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .step-content h3 {
        font-size: 0.875rem;
        line-height: 1.4;
    }
    
    .flow-arrow {
        transform: none;
        margin: 0;
        font-size: 1.5rem;
        padding-top: 2rem;
    }
    
    /* Contact Section */
    .contact-lead {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .form-group {
        margin-bottom: 1.25rem;
    }
    
    .form-group label {
        font-size: 0.9375rem;
    }
    
    .form-group input {
        padding: 0.625rem;
        font-size: 0.9375rem;
    }
    
    .submit-button {
        padding: 0.875rem;
        font-size: 1rem;
    }
}

/* ==========================================
   Scroll to Top Button
   ========================================== */

#scrollToTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, background-color 0.3s ease, transform 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

#scrollToTop.visible {
    opacity: 1;
    visibility: visible;
}

#scrollToTop:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(30, 58, 138, 0.4);
}

#scrollToTop:active {
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    #scrollToTop {
        width: 3rem;
        height: 3rem;
        font-size: 1.25rem;
        bottom: 5rem;
        right: 1.5rem;
    }
}