/* デザイン変数 */
:root {
    --sky-blue: #00a8e8;      /* 鮮やかな空色 */
    --sunny-yellow: #fff3b0;   /* 暖かい黄色 */
    --light-blue: #e3f2fd;    /* 薄い水色 */
    --accent-orange: #ff8a65; /* アクセントのオレンジ */
    --pure-white: #ffffff;
    --text-main: #455a64;     /* 柔らかな黒 */
    --font-maru: 'Zen Maru Gothic', sans-serif;
}

/* 基本リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--pure-white);
    color: var(--text-main);
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.9;
    font-size: 18px;
    overflow-x: hidden;
}

/* ヘッダー */
header {
    height: 90px;
    background-color: var(--pure-white);
    border-bottom: 3px solid var(--sunny-yellow);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-maru);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--sky-blue);
}

.logo span {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-left: 5px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.95rem;
    transition: 0.3s;
}

nav a:hover {
    color: var(--sky-blue);
}

/* ヒーローセクション */
.hero {
    padding: 80px 40px;
    background: radial-gradient(circle at 10% 10%, #fff9e6 0%, #ffffff 50%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.welcome {
    display: inline-block;
    background: var(--sky-blue);
    color: #fff;
    padding: 4px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 25px;
}

.hero h1 {
    font-family: var(--font-maru);
    font-size: 3.5rem;
    color: var(--sky-blue);
    line-height: 1.3;
    margin-bottom: 30px;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    color: #607d8b;
}

.btn-main {
    display: inline-block;
    padding: 18px 45px;
    background-color: var(--accent-orange);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 10px 20px rgba(255, 138, 101, 0.3);
    transition: 0.3s;
}

.btn-main:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(255, 138, 101, 0.4);
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 40% 60% 60% 40% / 60% 30% 70% 40%; /* 不規則な丸み */
    position: relative;
    z-index: 2;
}

.circle-deco {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--sunny-yellow);
    top: 20px;
    left: 20px;
    border-radius: 40% 60% 60% 40% / 60% 30% 70% 40%;
    z-index: 1;
    opacity: 0.5;
}

/* タイルグリッド */
.tile-section {
    padding: 120px 40px;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-family: var(--font-maru);
    font-size: 2.5rem;
    color: var(--text-main);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--sunny-yellow);
    z-index: -1;
}

.tile-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 350px);
    gap: 30px;
}

.tile {
    padding: 50px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tile-blue { background-color: var(--light-blue); }
.tile-yellow { background-color: var(--sunny-yellow); }
.tile-blue-light { background-color: #f0faff; border: 2px dashed var(--sky-blue); }

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

.tile h3 {
    font-family: var(--font-maru);
    font-size: 1.6rem;
    color: var(--sky-blue);
    margin-bottom: 20px;
}

.tile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

/* メッセージエリア */
.message-area {
    padding: 100px 40px 150px;
    text-align: center;
}

.message-card {
    max-width: 900px;
    margin: 0 auto;
    background-color: #fff;
    padding: 80px 40px;
    border-radius: 30px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.05);
    border: 1px solid #f0f0f0;
}

.message-card h2 {
    font-family: var(--font-maru);
    font-size: 2.2rem;
    margin-bottom: 30px;
}

.tel-box {
    margin-top: 50px;
    background: var(--light-blue);
    display: inline-block;
    padding: 20px 60px;
    border-radius: 10px;
}

.tel-box span {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--sky-blue);
}

.tel-box .number {
    font-family: var(--font-maru);
    font-size: 2.5rem;
    font-weight: 700;
}

/* フッター */
footer {
    padding: 60px 40px;
    background-color: var(--text-main);
    color: #fff;
    text-align: center;
}

.copyright {
    margin-top: 20px;
    font-size: 0.8rem;
    opacity: 0.6;
}

/* レスポンシブ */
@media (max-width: 900px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    .hero h1 { font-size: 2.5rem; }
    .tile-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    .tile { height: 350px; }
    .tile-image { order: -1; } /* モバイルでは画像が上 */
}