@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+JP:wght@400;500;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
    --ink: #16213a;          /* 濃紺 */
    --ink-2: #24324e;
    --accent: #2e4e8f;
    --line: #d5dae3;
    --bg: #e8eaef;
    --text: #2a2f38;
    --muted: #69707d;
    --mono: 'IBM Plex Mono', 'Consolas', monospace;
}

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

body {
    background-color: var(--bg);
    font-family: 'IBM Plex Sans JP', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
    color: var(--text);
    min-height: 100vh;
    font-feature-settings: "palt";
}

#wrapper {
    max-width: 900px;
    margin: 0 auto;
    background: #fff;
    min-height: 100vh;
    padding: 0 0 60px 0;
    border-left: 1px solid var(--line);
    border-right: 1px solid var(--line);
}

/* Header */
header {
    background: #fff;
    text-align: center;
    padding: 52px 40px 30px;
    border-bottom: 3px solid var(--ink);
}

header h1 {
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.14em;
}

header p.subtitle {
    margin-top: 12px;
    font-size: 0.82rem;
    color: var(--muted);
    letter-spacing: 0.28em;
}

/* Nav */
nav {
    background: var(--ink);
    display: flex;
    justify-content: center;
    gap: 0;
}

nav a {
    display: block;
    color: #fff;
    text-decoration: none;
    padding: 15px 44px 12px;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    border-bottom: 3px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}

nav a:hover,
nav a.active {
    background: var(--ink-2);
    border-bottom-color: #fff;
}

/* Main content */
main {
    padding: 48px 60px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* 見出し共通: 左の角バー */
.home-section h2,
.about-content h2,
.svc-cat,
.case-study h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.06em;
    border-left: 6px solid var(--ink);
    border-bottom: 1px solid var(--line);
    padding: 2px 0 8px 14px;
    margin-bottom: 18px;
}

/* HOME */
.home-section p {
    line-height: 1.95;
    color: var(--text);
    font-size: 0.95rem;
}

.home-section + .home-section {
    margin-top: 44px;
}

.home-section p + p {
    margin-top: 14px;
}

/* SERVICES */
.svc-cat {
    margin-top: 44px;
    margin-bottom: 8px;
}

.svc-cat:first-child {
    margin-top: 0;
}

.service-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.service-item:last-child {
    border-bottom: none;
}

.service-icon {
    width: 44px;
    height: 44px;
    background: #fff;
    border: 1.5px solid var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-family: var(--mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--ink);
}

.service-item h3 {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

.service-item p {
    font-size: 0.92rem;
    color: var(--text);
    line-height: 1.8;
}

.service-item p a {
    color: var(--accent);
    font-weight: 600;
}

/* ABOUT */
.about-content {
    line-height: 1.9;
    margin-bottom: 44px;
}

.about-lead {
    font-size: 0.95rem;
    line-height: 1.95;
    color: var(--text);
    margin-bottom: 12px;
}

.about-note {
    font-size: 0.9rem;
    line-height: 1.85;
    color: var(--muted);
    margin-top: 24px;
    padding: 14px 18px;
    background: #f5f6f8;
    border: 1px solid var(--line);
    border-left: 4px solid var(--ink);
}

.stack-list {
    list-style: none;
}

.stack-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text);
}

.stack-list li::before {
    content: "▪ ";
    color: var(--ink);
}

.stack-list strong {
    color: var(--ink);
    font-weight: 700;
}

.about-content ul {
    list-style: none;
    margin-top: 16px;
}

.about-content ul li {
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.95rem;
    color: var(--text);
}

.about-content ul li::before {
    content: "▪ ";
    color: var(--ink);
}

/* 想定価格 */
.price-list {
    list-style: none;
    margin-top: 2px;
}

.price-list li {
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--text);
    padding: 2px 0;
}

.price-list li::before {
    content: "▪ ";
    color: var(--ink);
}

.price-note {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 8px;
}

/* 統計テーブル */
.table-wrap {
    overflow-x: auto;
    margin: 14px 0 18px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.data-table th {
    text-align: left;
    color: var(--ink);
    font-weight: 700;
    letter-spacing: 0.04em;
    border-bottom: 2px solid var(--ink);
    padding: 8px 12px;
    white-space: nowrap;
}

.data-table td {
    border-bottom: 1px solid var(--line);
    padding: 7px 12px;
    color: var(--text);
    white-space: nowrap;
}

.data-table td:nth-child(n+2) {
    font-family: var(--mono);
    font-size: 0.84rem;
}

/* 記事内小見出し */
.case-study h3 {
    font-size: 1.0rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.04em;
    margin: 28px 0 10px;
    padding-left: 12px;
    border-left: 4px solid var(--ink);
}

/* 業務範囲 */
.scope-box {
    margin-top: 28px;
    border: 1px solid var(--line);
    border-left: 4px solid var(--ink);
    background: #f5f6f8;
    padding: 18px 22px;
}

.scope-box h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.06em;
    margin-bottom: 14px;
}

.scope-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.scope-cols h4 {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--line);
}

.scope-do h4 {
    color: var(--ink);
}

.scope-dont h4 {
    color: var(--muted);
}

.scope-cols ul {
    list-style: none;
}

.scope-cols li {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text);
    padding: 4px 0 4px 1.3em;
    text-indent: -1.3em;
}

.scope-do li::before {
    content: "○ ";
    color: var(--ink);
    font-weight: 700;
}

.scope-dont li::before {
    content: "× ";
    color: var(--muted);
    font-weight: 700;
}

@media (max-width: 640px) {
    .scope-cols {
        grid-template-columns: 1fr;
    }
}

/* Case Study */
.case-study {
    margin-top: 44px;
    padding-top: 32px;
    border-top: 1px solid var(--line);
}

.case-intro {
    font-size: 0.92rem;
    line-height: 1.85;
    color: var(--text);
    margin-bottom: 28px;
}

.fig-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.fig-item img {
    width: 100%;
    border: 1px solid var(--line);
}

.fig-item p {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 8px;
    line-height: 1.65;
}

.fig-full {
    margin: 18px 0;
}

.result-box {
    background: #f5f6f8;
    border: 1px solid var(--line);
    border-left: 4px solid var(--ink);
    padding: 16px 20px;
    margin-bottom: 24px;
    font-size: 0.92rem;
    line-height: 1.85;
    color: var(--text);
}

.result-box strong {
    font-family: var(--mono);
    font-weight: 600;
    color: var(--ink);
}

.result-box a {
    color: var(--accent);
    font-weight: 600;
}

/* FIP転診断 */
.badge {
    display: inline-block;
    background: var(--ink);
    color: #fff;
    font-family: var(--mono);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    padding: 3px 10px;
    vertical-align: 3px;
    margin-left: 10px;
}

.fip-note {
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.7;
}

.cta-button {
    display: inline-block;
    margin-top: 16px;
    padding: 12px 32px;
    background: var(--ink);
    color: #fff;
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.cta-button:hover {
    background: #24324e;
}

/* Footer */
footer {
    text-align: center;
    padding: 24px;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--muted);
    border-top: 1px solid var(--line);
    margin-top: 40px;
}

/* ---- モバイル対応 ---- */
@media (max-width: 700px) {
    #wrapper {
        border-left: none;
        border-right: none;
    }

    header {
        padding: 30px 16px 18px;
    }

    header h1 {
        font-size: 1.5rem;
        letter-spacing: 0.08em;
    }

    header p.subtitle {
        font-size: 0.72rem;
        letter-spacing: 0.12em;
    }

    nav {
        flex-wrap: wrap;
    }

    nav a {
        flex: 1 1 auto;
        text-align: center;
        padding: 12px 10px 9px;
        font-size: 0.8rem;
        letter-spacing: 0.06em;
        white-space: nowrap;
    }

    main {
        padding: 28px 18px;
    }

    .fig-grid {
        grid-template-columns: 1fr;
    }

    .service-item {
        gap: 14px;
    }

    .cta-button {
        display: block;
        text-align: center;
        padding: 12px 16px;
        font-size: 0.85rem;
    }

    .home-section h2,
    .about-content h2,
    .svc-cat,
    .case-study h2 {
        font-size: 1.05rem;
    }
}