:root {
    --color-primary: #1A1A1A;
    --color-accent: #0052FF;
    /* Vibrant Electric Blue */
    --color-text: #1A1A1A;
    --color-text-light: #4A4A4A;
    --color-bg: #FFFFFF;
    --color-bg-light: #F9F9F9;
    --color-border: #EAEAEA;

    --font-main: 'Inter',
        'Noto Sans JP',
        sans-serif;

    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 80px;
    --spacing-xl: 160px;

    --transition-timing: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.01em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-timing);
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: var(--spacing-md);
    background: var(--color-primary);
    color: white;
    padding: 10px 24px;
    z-index: 2000;
    transition: top var(--transition-timing);
}

.skip-link:focus {
    top: 20px;
}

ul {
    list-style: none;
}

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

/* Typography Scale */
h1,
h2,
h3,
h4 {
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.04em;
}

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

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

.mt-auto {
    margin-top: auto;
}

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

/* Layout & Containers */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        max-width: 1000px;
        padding: 0 40px;
    }
}

.section {
    padding: 80px 0;
}

.section.pb-large {
    padding-bottom: 120px;
}

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

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2.2rem;
    }
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
}

.section-desc {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    z-index: 1000;
    transition: all var(--transition-timing);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 32px;
    width: auto;
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav ul {
    display: flex;
    gap: 32px;
}

.nav ul a {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
}

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

@media (max-width: 768px) {
    .nav ul {
        display: none;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 18px 40px;
    border-radius: 0;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-timing);
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

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

.btn-portfolio {
    font-size: 1.1rem !important;
    letter-spacing: 0.15em;
    padding: 16px 32px;
    margin-top: 32px;
    /* Added spacing above the button */
}

.btn-sm {
    padding: 10px 24px;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 22px 50px;
    font-size: 0.95rem;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 240px 0 160px;
    background-color: var(--color-bg);
    overflow: hidden;
    z-index: 1;
}

#hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.5;
    pointer-events: none;
}

.hero-visual {
    position: absolute;
    top: 50%;
    right: -10%;
    transform: translateY(-50%);
    width: 60%;
    max-width: 800px;
    opacity: 0.8;
    z-index: 1;
    pointer-events: none;
}

.hero-visual img {
    width: 100%;
    height: auto;
    mask-image: radial-gradient(circle at center, black 40%, transparent 80%);
}

.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    left: -5%;
    width: 40%;
    height: 120%;
    background: radial-gradient(circle, rgba(0, 82, 255, 0.03) 0%, transparent 70%);
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
    text-align: left;
}

.hero-title {
    font-size: 4.5rem;
    margin-bottom: 40px;
    max-width: 900px;
    line-height: 1.05;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin-bottom: 50px;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero {
        padding: 180px 0 100px;
    }
}

/* Remove old hero image styles */

@media (min-width: 900px) {
    .hero-title {
        font-size: 3.2rem;
    }

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

/* Card Design System */
.card {
    background: white;
    border-radius: 0;
    transition: all var(--transition-timing);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-timing);
}

.card:hover {
    background-color: white;
    border-color: var(--color-primary);
    transform: translateY(-12px);
}

.card:hover::after {
    background-color: var(--color-primary);
    transform: scaleX(1);
    transform-origin: left;
}

.card:hover .solution-card-icon,
.card:hover .service-card-icon {
    color: var(--color-primary);
    opacity: 0.2 !important;
}

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

/* Solutions Grid */
.solutions-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.solution-card {
    background: white;
    padding: 80px 50px;
    border-radius: 0;
    text-align: left;
    transition: all var(--transition-timing);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.solution-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-timing);
}

.solution-card:hover {
    background-color: white;
    border-color: var(--color-primary);
    transform: translateY(-12px);
}

.solution-card:hover::after {
    background-color: var(--color-primary);
    transform: scaleX(1);
    transform-origin: left;
}

.solution-card-icon {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.1;
    margin-bottom: 24px;
    font-family: var(--font-main);
    line-height: 1;
    transition: all var(--transition-timing);
}

.solution-card:hover .solution-card-icon {
    color: var(--color-primary);
    opacity: 0.2;
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.solution-card p {
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.8;
}

/* Services Section (Grid Layout) */
.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Services Specific */
.service-card {
    padding: 80px 50px;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-primary);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-timing);
}

.service-card:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.service-card-icon {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.1;
    margin-bottom: 20px;
    font-family: var(--font-main);
    line-height: 1;
}

.service-card h3 {
    font-size: 2rem;
    margin-bottom: 24px;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.service-card p {
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* Works section */
.works-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

@media (min-width: 768px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .works-grid.grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}


.work-visual {
    width: 100%;
    background-color: var(--color-bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-bottom: 1px solid var(--color-border);
    min-height: 240px;
    position: relative;
    overflow: hidden;
}

.work-visual h3 {
    position: relative;
    z-index: 2;
    transition: transform var(--transition-timing);
}

.work-card:hover .work-visual h3 {
    transform: scale(1.1);
}

.work-content {
    padding: 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.work-content p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    line-height: 1.6;
}

/* Device Mockups */
.mockup-phone {
    width: 160px;
    height: 320px;
    background: #fff;
    border-radius: 20px;
    border: 6px solid #333;
    position: relative;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mockup-phone-header {
    background: #0A4275;
    color: white;
    text-align: center;
    padding: 10px 0;
    font-size: 0.7rem;
    font-weight: bold;
}

.mockup-phone-body {
    flex: 1;
    background: #7494C0;
    /* LINE default bg color */
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-bubble {
    background: white;
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 0.6rem;
    max-width: 80%;
    align-self: flex-start;
}

.chat-bubble.right {
    background: #85E249;
    align-self: flex-end;
}

.mockup-phone-menu {
    height: 80px;
    background: #fff;
    border-top: 1px solid #ddd;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1px;
    background-color: #eee;
}

.menu-item {
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.5rem;
    color: var(--color-primary);
}

.mockup-browser {
    width: 100%;
    max-width: 400px;
    height: 240px;
    background: white;
    border-radius: 8px;
    border: 1px solid #ddd;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.mockup-browser-header {
    height: 24px;
    background: #f0f0f0;
    border-bottom: 1px solid #ddd;
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 5px;
}

.browser-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ccc;
}

.browser-dot:nth-child(1) {
    background: #ff5f56;
}

.browser-dot:nth-child(2) {
    background: #ffbd2e;
}

.browser-dot:nth-child(3) {
    background: #27c93f;
}

.mockup-browser-body {
    flex: 1;
    background: #fafafa;
    display: flex;
    flex-direction: column;
}

.browser-hero {
    height: 80px;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.8rem;
    font-weight: bold;
}

.browser-content {
    padding: 15px;
    display: flex;
    gap: 10px;
}

.browser-text-line {
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    margin-bottom: 8px;
}

.mockup-video {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    background: #000;
}

.mockup-video iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.work-content {
    padding: 30px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.work-category {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 10px;
    background: rgba(10, 66, 117, 0.1);
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    align-self: flex-start;
}

.work-content h4 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

.work-content p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
    flex: 1;
}

.work-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.work-link:hover {
    text-decoration: underline;
}

/* Contact block */
.contact-box {
    background-color: white;
    padding: 60px 40px;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
    max-width: 800px;
    margin: 0 auto;
}

/* Footer */
.footer {
    background-color: var(--color-bg-light);
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.footer-copy {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* Representative Section */
.representative-box {
    background-color: var(--color-bg-light);
    padding: 80px 60px;
    border-radius: 0;
    border: none;
    max-width: 1000px;
    margin: 0 auto;
}

.representative-name {
    font-size: 2.5rem;
    margin-bottom: 10px;
    letter-spacing: -0.05em;
}

.representative-title {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 400;
    margin-left: 10px;
}

.representative-role {
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text);
}

.representative-bio {
    color: var(--color-text-light);
    font-size: 1.25rem;
    line-height: 2;
    max-width: 700px;
}

@media (max-width: 600px) {
    .representative-box {
        padding: 40px 20px;
    }

    .representative-name {
        font-size: 1.5rem;
    }
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

.delay-3 {
    transition-delay: 0.6s;
}