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

:root {
    --white: #FFFFFF;
    --black: #1A1A1A;
    --vermillion: #D84315;
    --gray-light: #F5F5F5;
    --gray-medium: #E0E0E0;
    --gray-dark: #616161;

    --font-sans: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-sans);
    color: var(--black);
    background-color: var(--white);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-medium);
    transition: var(--transition);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--black);
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: var(--black);
    font-weight: 400;
    transition: var(--transition);
    position: relative;
    font-size: 0.95rem;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--vermillion);
    transition: var(--transition);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.cta-link {
    background-color: var(--vermillion);
    color: var(--white) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 4px;
}

.cta-link::after {
    display: none;
}

.cta-link:hover {
    background-color: #BF360C;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--black);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-logo {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out;
}

.hero-logo img {
    max-width: 300px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.hero-accent {
    width: 60px;
    height: 4px;
    background-color: var(--vermillion);
    margin: 0 auto var(--spacing-md);
    animation: slideIn 0.8s ease-out;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--gray-dark);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-decoration {
    position: absolute;
    top: 20%;
    right: -10%;
    width: 500px;
    height: 500px;
    border: 1px solid var(--gray-medium);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    text-decoration: none;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #BF360C;
    border-color: #BF360C;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(216, 67, 21, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--black);
    border-color: var(--black);
}

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

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-label {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    color: var(--vermillion);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--black);
    position: relative;
    display: inline-block;
}

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

/* Concept Section */
.concept {
    background-color: var(--gray-light);
}

.concept-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.concept-text p {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    line-height: 2;
}

.concept-detail {
    font-family: var(--font-sans) !important;
    font-size: 1rem !important;
    color: var(--gray-dark);
    margin-top: var(--spacing-md);
    line-height: 1.8 !important;
}

.concept-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.concept-circle {
    width: 280px;
    height: 280px;
    border: 2px solid var(--vermillion);
    border-radius: 50%;
    position: relative;
    animation: rotate 30s linear infinite;
}

.concept-line {
    position: absolute;
    width: 150px;
    height: 2px;
    background-color: var(--black);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
}

/* Services Section */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-medium);
    transition: var(--transition);
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background-color: var(--vermillion);
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.service-card:hover::before {
    height: 100%;
}

.service-icon {
    width: 60px;
    height: 60px;
    color: var(--vermillion);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--black);
}

.service-card p {
    color: var(--gray-dark);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Works Section */
.works {
    background-color: var(--gray-light);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.work-card {
    background-color: var(--white);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-medium);
}

.work-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.work-image {
    aspect-ratio: 16 / 9;
    background-color: var(--gray-light);
    overflow: hidden;
}

.work-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-medium);
}

.work-placeholder svg {
    width: 80px;
    height: 80px;
}

.work-info {
    padding: var(--spacing-md);
}

.work-info h4 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.work-info p {
    color: var(--gray-dark);
    font-size: 0.9rem;
}

/* Profile Section */
.profile-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.profile-image {
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--vermillion);
}

.profile-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-medium);
}

.profile-placeholder svg {
    width: 120px;
    height: 120px;
}

.profile-text h3 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.profile-role {
    color: var(--vermillion);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.profile-description p {
    margin-bottom: var(--spacing-md);
    color: var(--gray-dark);
    line-height: 1.9;
}

/* Contact Section */
.contact {
    background-color: var(--gray-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--black);
}

.required {
    color: var(--vermillion);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 1px solid var(--gray-medium);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px rgba(216, 67, 21, 0.1);
}

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.contact-line {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: var(--white);
    padding: var(--spacing-lg);
    border: 1px solid var(--gray-medium);
}

.contact-line h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background-color: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--gray-medium);
    color: var(--gray-dark);
}

.qr-placeholder svg {
    width: 120px;
    height: 120px;
}

.line-note {
    font-size: 0.875rem;
    color: var(--gray-dark);
    line-height: 1.6;
}

/* Footer */
.footer {
    background-color: var(--black);
    color: var(--white);
    padding: var(--spacing-lg) 0;
}

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

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.footer-copy {
    font-size: 0.875rem;
    color: var(--gray-medium);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        width: 0;
    }
    to {
        width: 60px;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--gray-medium);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero {
        padding-top: 100px;
        min-height: 80vh;
    }

    .hero-logo img {
        max-width: 200px;
    }

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

    .concept-visual {
        height: 300px;
    }

    .concept-circle {
        width: 200px;
        height: 200px;
    }

    .service-grid,
    .works-grid {
        grid-template-columns: 1fr;
    }

    .profile-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-image {
        max-width: 250px;
        margin: 0 auto;
    }

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

    section {
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}