/* ==========================================
   ウェルデザ - メインスタイルシート
   モダン・スタイリッシュ / ブルー系
   ========================================== */

/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-list {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 120px;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(37, 99, 235, 0.7) 100%);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 700px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 24px;
    color: #ffffff;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #60a5fa 0%, #22d3ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 2;
}

/* Page Hero */
.page-hero {
    padding: 160px 0 80px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 16px;
}

.page-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Section Title */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 20px auto 0;
    border-radius: 2px;
}

/* Features Section */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 40px 32px;
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    color: var(--primary-color);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 16px;
}

.feature-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Services Section */
.services {
    padding: 80px 0;
}

.service-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 100px;
}

.service-block:last-child {
    margin-bottom: 0;
}

.service-block.reverse {
    direction: rtl;
}

.service-block.reverse > * {
    direction: ltr;
}

.service-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 16px;
    letter-spacing: 0.1em;
}

.service-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 2;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-list li {
    position: relative;
    padding-left: 24px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
}

.service-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon-large {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
    color: var(--primary-color);
}

.service-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    object-fit: cover;
}

/* Process Section */
.process {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step::after {
    content: '';
    position: absolute;
    top: 40px;
    right: -16px;
    width: 32px;
    height: 2px;
    background: var(--border-color);
}

.process-step:last-child::after {
    display: none;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    background: #ffffff;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
}

.step-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.step-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: var(--gradient-primary);
}

.cta-content {
    text-align: center;
    color: #ffffff;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-description {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta .btn-secondary {
    background-color: #ffffff;
    color: var(--primary-color);
    border-color: #ffffff;
}

.cta .btn-secondary:hover {
    background-color: transparent;
    color: #ffffff;
}

/* Footer */
.footer {
    padding: 60px 0;
    background-color: var(--bg-dark);
    color: #ffffff;
}

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

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 48px;
    }

    .process-step::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-content {
        height: 64px;
    }

    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 2rem;
    }

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

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

    .service-block,
    .service-block.reverse {
        grid-template-columns: 1fr;
        gap: 40px;
        direction: ltr;
    }

    .service-visual {
        order: -1;
    }

    .service-icon-large {
        width: 160px;
        height: 160px;
    }

    .service-icon-large svg {
        width: 80px;
        height: 80px;
    }

    .service-image {
        max-width: 100%;
    }

    .process-steps {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .page-hero {
        padding: 120px 0 60px;
    }

    .page-title {
        font-size: 1.75rem;
    }
}

/* Mobile Menu Active State */
.nav.active {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.nav.active .nav-list {
    flex-direction: column;
    gap: 16px;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}