/* ============================================
   北海道医療安全地方会 - メインスタイル
   style.css
   ============================================ */

/* ------------------------------------------
   CSS変数（カラーパレット・共通値）
   ------------------------------------------ */
:root {
    /* ── Blue系 ── */
    --blue-dark: #1a4f7a;
    /* ナビゲーションバー・バッジ背景 */
    --blue-main: #2575b7;
    /* 見出し・リンク・アイコン */
    --blue-mid: #3a87c8;
    /* 演題募集カード・ホバー */
    --blue-light: #d6e8f5;
    /* 薄い青背景・ボーダー */
    --blue-text: #1a4f7a;

    /* ── Green系 ── */
    --green-main: #4a9a5e;
    /* 参加登録カード */
    --green-dark: #3a7d4c;
    /* 参加登録ホバー */
    --green-light: #e2f3e8;
    /* 薄い緑背景 */

    /* ── Neutral系 ── */
    --white: #ffffff;
    --bg-light: #f4f7fb;
    /* セクション背景 */
    --gray-border: #d8dde6;
    /* ボーダー */
    --gray-light: #f0f2f5;
    /* テーブル偶数行 */
    --text-main: #2c2c2c;
    /* 本文テキスト */
    --text-sub: #666666;
    /* サブテキスト */
    --text-label: #999999;
    /* ラベル */

    /* ── サイズ・余白 ── */
    --container-width: 1100px;
    --nav-height: 48px;
    --radius-sm: 4px;
    --radius-md: 8px;

    /* ── シャドウ ── */
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);

    /* ── トランジション ── */
    --transition: 0.25s ease;
}

/* ------------------------------------------
   リセット・ベース
   ------------------------------------------ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP',
        'Yu Gothic', 'YuGothic', Meiryo, sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--blue-main);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--blue-mid);
    text-decoration: underline;
}

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

ul,
ol {
    list-style: none;
}

/* ------------------------------------------
   コンテナ
   ------------------------------------------ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ------------------------------------------
   ヘッダー
   ------------------------------------------ */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-border);
    padding: 16px 0;
}

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

.header-logo .name-ja {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--blue-dark);
    letter-spacing: 0.04em;
    line-height: 1.2;
}

.header-logo .name-en {
    font-size: 0.8rem;
    color: var(--text-sub);
    letter-spacing: 0.06em;
    margin-top: 4px;
}

.header-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-left: auto;
}

.header-info-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--blue-dark);
    color: var(--white);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    letter-spacing: 0.05em;
    min-width: 54px;
    text-align: center;
}

.header-info-text {
    font-size: 0.92rem;
    color: var(--text-main);
    line-height: 1.4;
    flex: none;
    text-align: left;
}

.header-info-text strong {
    font-size: 1.1rem;
    font-weight: 700;
}

.header-info-address {
    font-size: 0.78rem;
    color: var(--text-sub);
}

/* ------------------------------------------
   ナビゲーションバー
   ------------------------------------------ */
.site-nav {
    background-color: var(--blue-dark);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.site-nav .container {
    height: 100%;
    display: flex;
    align-items: stretch;
    position: relative;
}

.nav-list {
    display: flex;
    height: 100%;
    align-items: stretch;
    flex: 1;
}

.nav-list li {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.nav-list li+li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background-color: rgba(255, 255, 255, 0.25);
}

.nav-list a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: background-color var(--transition);
    padding: 0 8px;
    text-align: center;
}

.nav-list a:hover,
.nav-list a.active {
    background-color: var(--blue-mid);
    text-decoration: none;
}

/* ハンバーガーメニューボタン */
.hamburger {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    padding: 10px 12px;
    flex-direction: column;
    gap: 6px;
    border-radius: var(--radius-md);
    transition: background-color var(--transition), border-color var(--transition);
}

.hamburger:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.hamburger:focus {
    outline: 2px solid rgba(255, 255, 255, 0.4);
    outline-offset: 2px;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--white);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

/* ------------------------------------------
   ヒーローセクション
   ------------------------------------------ */
.hero {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
    line-height: 0;
}

.hero-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

/* ヒーローイメージの上に文字を重ねる場合 */
.hero-overlay {
    position: absolute;
    inset: 0;
    /* background: linear-gradient(to right,
            rgba(10, 40, 80, 0.45) 0%,
            rgba(10, 40, 80, 0.15) 60%,
            transparent 100%); */
    display: flex;
    align-items: center;
}

.hero-text {
    padding: 0 60px;
}

.hero-catch {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.4;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.04em;
}

.hero-sub {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.92);
    margin-top: 12px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.06em;
}

/* ------------------------------------------
   共通セクション
   ------------------------------------------ */
.section {
    padding: 56px 0;
}

.section-alt {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--blue-dark);
    padding-bottom: 10px;
    border-bottom: 3px solid var(--blue-main);
    margin-bottom: 28px;
    letter-spacing: 0.04em;
}

/* ------------------------------------------
   新着情報
   ------------------------------------------ */
.news-section .container {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 32px;
    align-items: start;
}

.news-block {
    background: var(--white);
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-md);
    padding: 28px 32px;
}

.news-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.news-block-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

.news-link-all {
    font-size: 0.85rem;
    color: var(--blue-main);
}

.news-list li {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-border);
    font-size: 0.9rem;
}

.news-list li:last-child {
    border-bottom: none;
}

.news-date {
    color: var(--text-sub);
    white-space: nowrap;
    font-size: 0.85rem;
    padding-top: 2px;
}

/* ------------------------------------------
   CTAカード（演題募集・参加登録）
   ------------------------------------------ */
.cta-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.cta-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    color: var(--white);
    transition: filter var(--transition), transform var(--transition);
    cursor: pointer;
    text-decoration: none;
}

.cta-card:hover {
    filter: brightness(1.08);
    transform: translateY(-2px);
    text-decoration: none;
    color: var(--white);
}

.cta-card-blue {
    background-color: var(--blue-mid);
}

.cta-card-green {
    background-color: var(--green-main);
}

.cta-card-red {
    background: linear-gradient(135deg, #f5a962 0%, #ed9f58 100%);
    box-shadow: 0 4px 12px rgba(245, 169, 98, 0.3);
}

.cta-card-red:hover {
    box-shadow: 0 6px 16px rgba(245, 169, 98, 0.4);
}

.cta-card-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.cta-card-body {
    flex: 1;
}

.cta-card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.cta-card-period {
    font-size: 0.75rem;
    opacity: 0.9;
}

.cta-card-arrow {
    font-size: 1rem;
    opacity: 0.8;
}

/* ------------------------------------------
   情報グリッド（開催概要・プログラム・会場案内・協賛）
   ------------------------------------------ */
.info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.info-card {
    background: var(--white);
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    transition: box-shadow var(--transition), transform var(--transition);
    cursor: pointer;
    text-decoration: none;
    display: block;
}

.info-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    text-decoration: none;
}

.info-card-icon {
    font-size: 2rem;
    color: var(--blue-main);
    margin-bottom: 12px;
}

.info-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--blue-main);
    margin-bottom: 8px;
}

.info-card-desc {
    font-size: 0.82rem;
    color: var(--text-sub);
    line-height: 1.6;
}

/* ------------------------------------------
   ページ内共通：ページヘッダー
   ------------------------------------------ */
.page-header {
    background-color: var(--blue-dark);
    color: var(--white);
    padding: 36px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.page-header p {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-top: 6px;
}

/* パンくずリスト */
.breadcrumb {
    background-color: var(--bg-light);
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-border);
    font-size: 0.82rem;
    color: var(--text-sub);
}

.breadcrumb ol {
    display: flex;
    gap: 8px;
    align-items: center;
}

.breadcrumb li+li::before {
    content: '›';
    color: var(--text-label);
}

.breadcrumb a {
    color: var(--blue-main);
}

/* ------------------------------------------
   テーブル
   ------------------------------------------ */
.table-basic {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table-basic th,
.table-basic td {
    padding: 14px 20px;
    border: 1px solid var(--gray-border);
    vertical-align: top;
    line-height: 1.6;
}

.table-basic th {
    background-color: var(--blue-light);
    color: var(--blue-dark);
    font-weight: 600;
    width: 220px;
    text-align: left;
}

.table-basic tr:nth-child(even) td {
    background-color: var(--gray-light);
}

/* ------------------------------------------
   ボタン
   ------------------------------------------ */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    border: none;
    transition: background-color var(--transition), transform var(--transition);
    text-align: center;
}

.btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--blue-main);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--blue-dark);
    color: var(--white);
}

.btn-green {
    background-color: var(--green-main);
    color: var(--white);
}

.btn-green:hover {
    background-color: var(--green-dark);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    color: var(--blue-main);
    border: 2px solid var(--blue-main);
}

.btn-outline:hover {
    background-color: var(--blue-main);
    color: var(--white);
}

/* ------------------------------------------
   フッター
   ------------------------------------------ */

.site-footer {
    background-color: var(--blue-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 60px 0 30px;
    font-size: 0.85rem;
}

.footer-inner {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-logo {
    flex: 0 0 320px;
}

.footer-logo .name-ja {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
}

.footer-logo .name-en {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 4px;
}

.footer-logo address {
    font-style: normal;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    margin-top: 15px;
    line-height: 1.8;
}

.footer-contact {
    flex: 1;
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 3px solid rgba(255, 255, 255, 0.2);
    padding: 24px 30px;
    border-radius: var(--radius-md);
}

.footer-contact-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.footer-contact-org p {
    margin: 0;
    color: var(--white);
    font-size: 0.9rem;
}

.footer-contact-info {
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-contact-info a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.footer-contact-info a:hover {
    color: var(--white);
    text-decoration: none;
}

.footer-copyright {
    text-align: center;
    padding-top: 25px;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ------------------------------------------
   ユーティリティ
   ------------------------------------------ */
.text-center {
    text-align: center;
}

.text-blue {
    color: var(--blue-main);
}

.text-green {
    color: var(--green-main);
}

.mt-8 {
    margin-top: 8px;
}

.mt-16 {
    margin-top: 16px;
}

.mt-24 {
    margin-top: 24px;
}

.mt-32 {
    margin-top: 32px;
}

.mb-8 {
    margin-bottom: 8px;
}

.mb-16 {
    margin-bottom: 16px;
}

.mb-24 {
    margin-bottom: 24px;
}