/* デザイン変数 */
:root {
    --main-orange: #ff9800;   /* 元気なオレンジ */
    --sub-yellow: #fff176;    /* 明るいイエロー */
    --accent-blue: #4fc3f7;   /* 爽やかなブルー */
    --paper-bg: #fdfdfd;      /* ほぼ白 */
    --text-black: #424242;
    --font-pop: 'Yusei Magic', sans-serif;
    --font-main: 'Zen Maru Gothic', sans-serif;
}

/* 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #f0f0f0; /* 背景は少しグレーで紙を引き立たせる */
    color: var(--text-black);
    font-family: var(--font-main);
    line-height: 1.8;
    font-size: 18px;
}

/* ヘッダー */
header {
    background-color: var(--main-orange);
    padding: 20px 0;
    box-shadow: 0 4px 0 rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-pop);
    font-size: 1.8rem;
    color: #fff;
}

.logo span {
    font-size: 1.2rem;
    background: #fff;
    color: var(--main-orange);
    padding: 2px 10px;
    border-radius: 5px;
    margin-left: 10px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    padding: 5px 15px;
    border-radius: 20px;
    border: 2px solid transparent;
    transition: 0.3s;
}

nav a:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
}

/* ヒーローセクション */
.hero {
    background-color: var(--paper-bg);
    padding: 80px 20px;
    border-bottom: 5px dashed var(--main-orange);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text-card {
    flex: 1;
    background: #fff;
    padding: 50px;
    border: 3px solid var(--text-black);
    box-shadow: 15px 15px 0 var(--sub-yellow);
    transform: rotate(-1deg);
}

.badge {
    background: var(--accent-blue);
    color: #fff;
    padding: 5px 15px;
    font-weight: 900;
    display: inline-block;
    margin-bottom: 20px;
    border-radius: 4px;
}

.hero h1 {
    font-family: var(--font-pop);
    font-size: 3rem;
    line-height: 1.3;
    margin-bottom: 25px;
    color: var(--main-orange);
}

.hero-visual {
    flex: 1;
}

.hero-visual img {
    width: 100%;
    border-radius: 50% 20% 50% 20%;
    border: 8px solid #fff;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* メインコンテンツ（付箋風） */
.main-content {
    padding: 100px 20px;
}

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

.title-accent {
    text-align: center;
    font-family: var(--font-pop);
    font-size: 2.5rem;
    margin-bottom: 80px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.title-accent::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 15px;
    background: var(--sub-yellow);
    z-index: -1;
}

.sticky-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.sticky-note {
    padding: 40px;
    position: relative;
    min-height: 350px;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.05);
    transition: 0.3s;
}

.sticky-note:hover {
    transform: scale(1.05) rotate(0deg) !important;
}

.note-orange { background: #ffecb3; transform: rotate(2deg); }
.note-yellow { background: #fff9c4; transform: rotate(-1deg); }
.note-blue { background: #e1f5fe; transform: rotate(1.5deg); }

.tape {
    width: 120px;
    height: 40px;
    background: rgba(255,255,255,0.5);
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 2px 2px 5px rgba(0,0,0,0.05);
}

.icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 20px;
}

.sticky-note h3 {
    font-family: var(--font-pop);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* 特集セクション */
.special-feature {
    background: var(--text-black);
    color: #fff;
    padding: 100px 20px;
}

.feature-box {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.feature-img {
    flex: 1;
}

.feature-img img {
    width: 100%;
    clip-path: polygon(10% 0, 100% 0, 90% 100%, 0 100%);
}

.feature-desc {
    flex: 1;
}

.feature-desc h2 {
    font-family: var(--font-pop);
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--sub-yellow);
}

.round-btn {
    display: inline-block;
    margin-top: 30px;
    padding: 15px 40px;
    background: var(--main-orange);
    color: #fff;
    text-decoration: none;
    font-weight: 900;
    border-radius: 50px;
    transition: 0.3s;
}

.round-btn:hover {
    background: #fff;
    color: var(--main-orange);
}

/* フッター */
footer {
    padding: 60px 20px;
    text-align: center;
    background: #fff;
    border-top: 5px solid var(--sub-yellow);
}

.copyright {
    margin-top: 20px;
    font-size: 0.8rem;
    color: #999;
}

/* レスポンシブ */
@media (max-width: 900px) {
    .hero-container, .feature-box, .sticky-grid {
        flex-direction: column;
        grid-template-columns: 1fr;
    }
    .hero-text-card {
        padding: 30px;
    }
    .hero h1 {
        font-size: 2rem;
    }
}