@charset "UTF-8";

/* =========================================
   基本設定 (Basic Settings)
   ========================================= */
:root {
    /* メインカラー定義 */
    --primary-color: #58a77c;
    --primary-dark: #3a7552;
    --accent-color: #d66b6b;
    
    /* マナーモード用カラー */
    --manner-color: #e69b5c;
    --manner-dark: #d67d3e;
    
    /* テキストカラー */
    --text-dark: #444444;
    --text-light: #777777;
    
    /* 背景色 */
    --bg-light: #f9fbf9;
    --white: #ffffff;
    
    /* 影の設定 */
    --shadow-sm: 0 4px 15px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.08);
    
    /* フォント設定 */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;

    /* コース別テーマカラー */
    --color-culture: #15803d;
    --bg-culture: #f0fdf4;
    --color-study: #fbbf24;
    --bg-study: #fffbeb;
    --color-enjoy: #7e22ce;
    --bg-enjoy: #faf5ff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-weight: 400;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.8;
    overflow-x: hidden;
    margin: 0;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 25px;
}

/* =========================================
   見出し・ボタン (Common UI)
   ========================================= */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: 2.2rem;
    color: var(--text-dark);
    display: inline-block;
    margin-bottom: 10px;
    letter-spacing: 0.05em;
}

.section-subtitle {
    color: var(--text-light);
    font-size: 0.95rem;
}

.btn {
    display: inline-block;
    padding: 12px 35px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(88, 167, 124, 0.3);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(88, 167, 124, 0.4);
}

/* =========================================
   アニメーション (Animations)
   ========================================= */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.animate-up.show {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.stagger-item.show {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   ヘッダー (Header)
   ========================================= */
header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
    transition: all 0.4s ease;
    background-color: transparent;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 10px 0;
}

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

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--white);
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    letter-spacing: 0.05em;
}

header.scrolled .logo {
    color: var(--primary-color);
}

.logo span {
    font-family: var(--font-main);
    font-size: 0.75rem;
    font-weight: 300;
    opacity: 0.9;
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    gap: 20px;
}

.nav-menu a {
    font-weight: 400;
    font-size: 0.9rem;
    color: var(--white);
    position: relative;
}

header.scrolled .nav-menu a {
    color: var(--text-dark);
}

.menu-toggle {
    display: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

header.scrolled .menu-toggle {
    color: var(--text-dark);
}

/* =========================================
   フッター (Footer)
   ========================================= */
footer {
    background-color: #2c3e34;
    color: rgba(255,255,255,0.7);
    padding: 50px 0;
    text-align: center;
}

/* =========================================
   レスポンシブ共通 (Responsive Common)
   ========================================= */
.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        padding: 40px;
        transition: 0.4s;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        right: 0;
    }

    .menu-toggle {
        display: block;
        z-index: 1001;
    }

    .mobile-only {
        display: block;
    }
}

@media (min-width: 769px) {
    .mobile-only {
        display: none !important;
    }
}