/* 
 * SVAION Website Main Stylesheet
 * ------------------------------ 
 */

/* ----------------
   Variables
   ---------------- */
:root {
    /* Main Colors */
    --color-wisteria: #8B72BE;    /* ウィスタリア */
    --color-royal-blue: #335ACF;  /* ロイヤルブルー */
    
    /* Sub Colors */
    --color-gold: #D4AF37;        /* ゴールド */
    --color-silver: #C0C0C0;      /* シルバー */
    --color-white: #FFFFFF;       /* ホワイト */
    --color-gray-light: #F5F5F5;  /* ライトグレー */
    --color-gray: #808080;        /* グレー */
    --color-gray-dark: #333333;   /* ダークグレー */
    --color-black: #000000;       /* ブラック */
    
    /* Fonts */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-heading: 'Noto Serif JP', serif;  /* 明朝体 */
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

a {
    color: var(--color-royal-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-wisteria);
}

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

ul, ol {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-md);
}

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

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

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

/* ----------------
   Components
   ---------------- */

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-royal-blue);
    color: var(--color-white);
    border: 2px solid var(--color-royal-blue);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-royal-blue);
}

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

.btn-secondary:hover {
    background-color: var(--color-wisteria);
    color: var(--color-white);
}

.btn-contact {
    background-color: var(--color-gold);
    color: var(--color-white);
    border: 2px solid var(--color-gold);
}

.btn-contact:hover {
    background-color: transparent;
    color: var(--color-gold);
}

/* Section Title */
.section-title {
    position: relative;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-dark);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-wisteria);
    margin: var(--spacing-sm) auto 0;
}

.section-subtitle {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-gray);
    font-size: 1.1rem;
}

/* ----------------
   Header
   ---------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo img {
    height: 40px;
}

.main-nav ul {
    display: flex;
    align-items: center;
}

.main-nav li:not(:last-child) {
    margin-right: var(--spacing-lg);
}

.main-nav a {
    color: var(--color-gray-dark);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.main-nav a:hover {
    color: var(--color-wisteria);
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
}

.hamburger-menu span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-gray-dark);
    transition: all var(--transition-fast);
}

/* ----------------
   Hero Section
   ---------------- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.4));
}

.hero-content {
    position: relative;
    color: var(--color-white);
    max-width: 800px;
    padding-top: 80px; /* Account for fixed header */
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 0.5s;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 0.7s;
}

/* ----------------
   Services Section
   ---------------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.service-icon {
    margin: 0 auto var(--spacing-md);
    width: 80px;
    height: 80px;
}

.service-title {
    color: var(--color-royal-blue);
    margin-bottom: var(--spacing-md);
}

.service-description {
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-md);
}

.feature-icon {
    margin: 0 auto var(--spacing-md);
    width: 60px;
    height: 60px;
}

.feature-title {
    color: var(--color-wisteria);
    margin-bottom: var(--spacing-sm);
}

/* ----------------
   Achievements Section
   ---------------- */
.achievement-slider {
    margin: var(--spacing-lg) 0;
}

.achievement-card {
    display: flex;
    flex-direction: column;
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin: 0 var(--spacing-md);
}

.achievement-image {
    height: 200px;
    overflow: hidden;
}

.achievement-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.achievement-card:hover .achievement-image img {
    transform: scale(1.05);
}

.achievement-content {
    padding: var(--spacing-lg);
}

.achievement-title {
    color: var(--color-royal-blue);
    margin-bottom: var(--spacing-sm);
}

/* ----------------
   Blog Section
   ---------------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.blog-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-5px);
}

.blog-image {
    height: 200px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.blog-card:hover .blog-image img {
    transform: scale(1.05);
}

.blog-content {
    padding: var(--spacing-lg);
}

.blog-date {
    color: var(--color-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.blog-title {
    color: var(--color-gray-dark);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.blog-card:hover .blog-title {
    color: var(--color-wisteria);
}

.blog-excerpt {
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.blog-link {
    color: var(--color-wisteria);
    font-weight: 600;
    display: inline-block;
    position: relative;
}

.blog-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-wisteria);
    transition: width var(--transition-fast);
}

.blog-card:hover .blog-link::after {
    width: 100%;
}

/* ----------------
   CTA Section
   ---------------- */
.cta {
    background: linear-gradient(to right, var(--color-royal-blue), var(--color-wisteria));
    color: var(--color-white);
}

.cta-inner {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-text {
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.cta .btn-primary {
    background-color: var(--color-white);
    color: var(--color-royal-blue);
    border-color: var(--color-white);
}

.cta .btn-primary:hover {
    background-color: transparent;
    color: var(--color-white);
}

/* ----------------
   Footer
   ---------------- */
.footer {
    background-color: var(--color-gray-dark);
    color: var(--color-gray-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 40px;
}

.footer-description {
    margin-bottom: var(--spacing-md);
    color: var(--color-silver);
}

.footer-contact li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
}

.footer-contact i {
    margin-right: var(--spacing-sm);
    color: var(--color-wisteria);
}

.footer-heading {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.footer-links li, .footer-services li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a, .footer-services a {
    color: var(--color-silver);
    transition: color var(--transition-fast);
}

.footer-links a:hover, .footer-services a:hover {
    color: var(--color-wisteria);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    color: var(--color-silver);
    font-size: 0.9rem;
}

.footer-policy a {
    color: var(--color-silver);
    font-size: 0.9rem;
}

.footer-policy a:hover {
    color: var(--color-white);
}

/* ----------------
   Animations
   ---------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}