:root {
    --deep-green: #0b3a2a;
    --deep-green-light: #1e5a45;
    --accent: #c8a95f;
    /* ゴールド系アクセント */
    --bg: #f2f4f3;
    --text: #222;
    --white: #ffffff;
}

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

body {
    font-family: "Helvetica Neue", "Noto Sans JP", Arial, sans-serif;
    color: var(--text);
    background-color: var(--bg);
    line-height: 1.8;
}

header {
    position: relative;
    background-image: url('header-image.jpg');
    /* ここに使用したい画像パスを指定 */
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 120px 20px;
    text-align: center;
}

header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(15, 61, 46, 0.65);
    /* 深緑のオーバーレイ */
}

header h1,
header p {
    font-size: 1.2rem;
    opacity: 0.95;
    letter-spacing: 0.08em;
}

header h1 {
    font-size: 3rem;
    letter-spacing: 0.15em;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

section {
    max-width: 1100px;
    margin: 0 auto 40px;
    padding: 90px 30px;
    background-color: var(--white);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
}

section h2 {
    font-size: 2.1rem;
    color: var(--deep-green);
    margin-bottom: 40px;
    position: relative;
    letter-spacing: 0.08em;
}

section h2::after {
    content: "";
    width: 80px;
    height: 3px;
    background: linear-gradient(to right, var(--accent), var(--deep-green));
    position: absolute;
    bottom: -15px;
    left: 0;
}

.concept {
    font-size: 1.4rem;
    text-align: center;
    color: var(--deep-green);
    font-weight: 500;
}

.profile dl {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 10px 30px;
}

.profile dt {
    font-weight: bold;
    color: var(--deep-green);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service {
    background: linear-gradient(180deg, #ffffff, #f7f9f8);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(200, 169, 95, 0.2);
}

.service h3 {
    color: var(--deep-green);
    margin-bottom: 15px;
}

.flow ol {
    counter-reset: step;
}

.flow li {
    list-style: none;
    margin-bottom: 40px;
    position: relative;
    padding-left: 60px;
}

.flow li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--deep-green);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

footer {
    background: linear-gradient(135deg, var(--deep-green), #06261c);
    color: var(--white);
    padding: 60px 20px;
    text-align: center;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
}

footer p {
    opacity: 0.9;
}

/* ===== ハンバーガーメニュー ===== */
.nav-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(15, 61, 46, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    content: "";
    display: block;
    width: 20px;
    height: 2px;
    background: var(--white);
    position: relative;
    transition: 0.3s;
}

.nav-toggle span::before {
    position: absolute;
    top: -6px;
}

.nav-toggle span::after {
    position: absolute;
    top: 6px;
}

nav {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, var(--deep-green), #06261c);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: 0.4s;
    z-index: 1000;
}

nav.active {
    opacity: 1;
    pointer-events: auto;
}

nav ul {
    list-style: none;
    text-align: center;
}

nav li {
    margin: 20px 0;
}

nav a {
    color: var(--white);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    text-decoration: none;
    transition: color 0.3s;
}

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