@charset "utf-8";

/* ==========================================================================
   Variables
   ========================================================================== */
   :root {
    --color-primary: #1A365D; /* ネイビー */
    --color-accent: #2B6CB0; /* 知的なブルー */
    --color-accent-light: #EBF8FF;
    --color-text-main: #2D3748;
    --color-text-muted: #718096;
    --color-bg-base: #FFFFFF;
    --color-bg-gray: #F7FAFC;
    --color-border: #E2E8F0;
    
    --font-sans: 'Inter', 'Noto Sans JP', sans-serif;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    
    --transition-base: all 0.3s ease;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text-main);
    background-color: var(--color-bg-base);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

.text-center { text-align: center; }
.bg-gray { background-color: var(--color-bg-gray); }

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
.section-label {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 800px;
    margin: 0 auto;
}

.section {
    padding: 6rem 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
    cursor: pointer;
    text-align: center;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 14px 0 rgba(43, 108, 176, 0.39);
}

.btn-primary:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 54, 93, 0.4);
}

.btn-outline {
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    background-color: transparent;
}

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

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

.btn-white:hover {
    background-color: var(--color-bg-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition-base);
}

.header.is-scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-main {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.logo-sub {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary) 0%, #0c1a2e 100%);
    color: #fff;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero-glow {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 60%;
    height: 80%;
    background: radial-gradient(circle, rgba(43, 108, 176, 0.4) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    filter: blur(60px);
}

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

.hero-content {
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(4px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
}

.hero-action {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ==========================================================================
   Components (Cards)
   ========================================================================== */
.card {
    background-color: #fff;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--color-border);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-accent-light);
}

/* ==========================================================================
   Pain Section
   ========================================================================== */
.pain-section {
    position: relative;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

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

.pain-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.pain-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.6;
}

/* ==========================================================================
   Service Section
   ========================================================================== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.service-card {
    position: relative;
    padding-top: 3.5rem;
}

.service-no {
    position: absolute;
    top: 2rem;
    left: 2rem;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-bg-gray);
    line-height: 1;
    z-index: 0;
    font-family: 'Inter', sans-serif;
}

.service-card:hover .service-no {
    color: var(--color-accent-light);
}

.service-title {
    position: relative;
    z-index: 1;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.service-text {
    position: relative;
    z-index: 1;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* ==========================================================================
   Reason Section
   ========================================================================== */
.reason-section {
    overflow: hidden;
}

.reason-list {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
}

.reason-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background-color: #fff;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.reason-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
    border-left: 4px solid var(--color-accent);
}

.reason-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background-color: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem;
}

.reason-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.reason-text {
    color: var(--color-text-muted);
}

/* ==========================================================================
   Contact Section (CTA) & Form
   ========================================================================== */
.contact-section {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    color: #fff;
    padding: 6rem 0;
}

.contact-container {
    max-width: 800px;
}

.contact-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.contact-desc {
    font-size: 1.125rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.contact-form {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: left;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9375rem;
}

.required {
    display: inline-block;
    color: #ff4d4f;
    font-size: 0.875rem;
    font-weight: 700;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.form-control {
    width: 100%;
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.3);
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--color-text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: #fff;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
    background-color: #fff;
}

.form-submit {
    margin-top: 2.5rem;
}

.form-submit .btn-white {
    border: none;
    min-width: 250px;
    font-family: inherit;
    cursor: pointer;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #f8fafc;
    border-top: 1px solid var(--color-border);
    padding: 4rem 0 2rem;
}

.footer-top {
    margin-bottom: 3rem;
}

.footer-logo {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.footer-company,
.footer-director {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 2rem;
    text-align: center;
}

.copyright {
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-text {
        font-size: 1.125rem;
    }
    
    .reason-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .pain-grid, .service-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-title {
        font-size: 1.5rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
}