/* ==========================================================================
   3Dセキュア操作ガイド - スタイルシート (コスメ・スキンケアショップ向け洗練スタイル)
   ========================================================================== */

:root {
    /* カラーパレット: 上品なグレージュ・ウォームモカ・シャンパンゴールド */
    --color-bg-page: #F3F1ED;
    --color-bg-container: #FCFCFB;
    --color-bg-card: #FFFFFF;
    
    --color-primary: #8A6D56;
    --color-primary-light: #F6F1EC;
    --color-primary-dark: #6C523D;
    --color-accent-gold: #C5A880;
    
    --color-text-main: #332F2D;
    --color-text-sub: #68625E;
    --color-text-light: #9B948E;
    
    --color-border: #E8E4DF;
    --color-border-light: #F0EDE9;
    
    /* ステータスカラー (柔らかいニュアンスカラー) */
    --color-danger-bg: #FDF4F3;
    --color-danger-border: #F0CBC8;
    --color-danger-text: #A84640;
    
    --color-success-bg: #F2F7F4;
    --color-success-border: #BDD8CA;
    --color-success-text: #2C6E4E;
    
    --color-tips-bg: #FAF6EF;
    --color-tips-border: #E6D8BF;
    --color-tips-text: #826330;

    /* シャドウ & 角丸 */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-soft: 0 4px 20px rgba(74, 58, 46, 0.05);
    --shadow-card: 0 2px 10px rgba(60, 48, 40, 0.04);
    --shadow-container: 0 10px 30px rgba(60, 48, 40, 0.08);
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg-page);
    color: var(--color-text-main);
    line-height: 1.75;
    letter-spacing: 0.02em;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

/* コンテナ (モバイル最適化: max-width 480px) */
.page-wrapper {
    width: 100%;
    max-width: 480px;
    background-color: var(--color-bg-container);
    min-height: 100vh;
    box-shadow: var(--shadow-container);
    display: flex;
    flex-direction: column;
    position: relative;
}

/* ==========================================================================
   ヘッダー
   ========================================================================== */
.main-header {
    background: linear-gradient(180deg, #443B36 0%, #302A26 100%);
    color: #FFFFFF;
    padding: 34px 24px 30px;
    text-align: center;
    position: relative;
}

.main-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #8A6D56, #C5A880, #8A6D56);
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 4px 12px;
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: #E6D6C3;
    margin-bottom: 14px;
}

.main-title {
    font-size: 21px;
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: 0.04em;
    color: #FFFFFF;
    margin-bottom: 10px;
}

.header-desc {
    font-size: 12.5px;
    line-height: 1.6;
    color: #D3CCC4;
}

/* ==========================================================================
   メインコンテンツエリア
   ========================================================================== */
.content-container {
    padding: 24px 18px 40px;
    flex: 1;
}

/* ==========================================================================
   アラート & 解決ポイント (困ったときの状況説明)
   ========================================================================== */
.alert-section {
    margin-bottom: 28px;
}

.trouble-card {
    background-color: var(--color-danger-bg);
    border: 1px solid var(--color-danger-border);
    border-radius: var(--radius-md);
    padding: 18px 16px;
    margin-bottom: 14px;
}

.card-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 12px;
    margin-bottom: 10px;
}

.trouble-tag {
    background-color: #EAD0CE;
    color: var(--color-danger-text);
}

.tag-icon {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: var(--color-danger-text);
    color: #FFFFFF;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
}

.trouble-heading {
    font-size: 14.5px;
    font-weight: 700;
    color: var(--color-danger-text);
    line-height: 1.5;
    margin-bottom: 8px;
}

.trouble-text {
    font-size: 13px;
    color: #5A3A38;
    line-height: 1.65;
}

.trouble-text strong {
    color: var(--color-danger-text);
    background: rgba(168, 70, 64, 0.08);
    padding: 1px 4px;
    border-radius: 3px;
}

/* 解決ポイント */
.solution-card {
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: var(--radius-md);
    padding: 18px 16px;
}

.solution-header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 8px;
}

.solution-badge {
    align-self: flex-start;
    background-color: var(--color-success-text);
    color: #FFFFFF;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 12px;
    letter-spacing: 0.03em;
}

.solution-heading {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-success-text);
    line-height: 1.45;
}

.solution-text {
    font-size: 13px;
    color: #244C38;
    line-height: 1.65;
}

.solution-text strong {
    color: var(--color-success-text);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 2px;
}

/* ==========================================================================
   ガイドセクション (タブ切り替え)
   ========================================================================== */
.guide-section {
    margin-bottom: 30px;
}

.section-title-wrap {
    text-align: center;
    margin-bottom: 18px;
}

.section-sub {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--color-accent-gold);
    display: block;
    margin-bottom: 2px;
}

.section-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text-main);
}

/* タブボタン */
.device-tabs {
    display: flex;
    background: #EFECE7;
    padding: 4px;
    border-radius: 30px;
    gap: 4px;
    margin-bottom: 22px;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 14px;
    border: none;
    background: transparent;
    border-radius: 26px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-sub);
    cursor: pointer;
    transition: all 0.25s ease;
}

.tab-btn .tab-icon {
    transition: stroke 0.25s ease;
}

.tab-btn.active {
    background: #FFFFFF;
    color: var(--color-primary-dark);
    box-shadow: 0 2px 8px rgba(60, 48, 40, 0.1);
}

.tab-btn.active .tab-icon {
    stroke: var(--color-primary);
}

/* コンテンツ表示切り替え */
.guide-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.guide-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   手順カード (フローカード)
   ========================================================================== */
.flow-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 22px 16px 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-card);
    position: relative;
}

.flow-card-head {
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--color-border);
}

.flow-badge {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 6px;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    border: 1px solid rgba(138, 109, 86, 0.2);
}

.flow-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1.4;
    margin-bottom: 4px;
}

.flow-sub {
    font-size: 12px;
    color: var(--color-text-light);
}

/* ステップリスト */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.step-item {
    display: flex;
    gap: 12px;
    background-color: #FAF9F7;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 16px 14px;
}

.step-marker {
    flex-shrink: 0;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #FFFFFF;
    font-family: 'Montserrat', sans-serif;
    font-size: 10.5px;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 6px;
    letter-spacing: 0.04em;
}

.step-body {
    flex: 1;
}

.step-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-main);
    line-height: 1.45;
    margin-bottom: 6px;
}

.step-detail {
    font-size: 13px;
    color: var(--color-text-sub);
    line-height: 1.65;
    margin-bottom: 10px;
}

.step-detail:last-child {
    margin-bottom: 0;
}

.highlight {
    background: linear-gradient(transparent 65%, #F0DFB8 65%);
    font-weight: 700;
    color: #443B36;
    padding: 0 3px;
}

/* ガイド画像 */
.step-media {
    margin-top: 10px;
    text-align: center;
}

.flow-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    background-color: #FFFFFF;
    display: inline-block;
}

.mini-media .flow-img {
    max-width: 160px;
}

/* サブアドバイス (Chromeタブ等) */
.sub-advice-box {
    margin-top: 16px;
    background-color: var(--color-tips-bg);
    border: 1px solid var(--color-tips-border);
    border-radius: var(--radius-md);
    padding: 14px;
}

.sub-advice-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--color-tips-text);
    margin-bottom: 6px;
}

.advice-icon {
    font-size: 14px;
}

.sub-advice-body p,
.sub-advice-text {
    font-size: 12.5px;
    color: #634C24;
    line-height: 1.6;
}

/* ==========================================================================
   最もスムーズな方法 (通知案内カード)
   ========================================================================== */
.recommend-section {
    margin-bottom: 24px;
}

.recommend-card {
    background: linear-gradient(145deg, #FAF7F2 0%, #F5EFE6 100%);
    border: 1.5px solid var(--color-accent-gold);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    box-shadow: var(--shadow-card);
}

.recommend-head {
    margin-bottom: 10px;
}

.recommend-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background-color: var(--color-primary);
    color: #FFFFFF;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    margin-bottom: 8px;
}

.recommend-badge svg {
    color: #FFDE8A;
}

.recommend-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.45;
}

.recommend-text {
    font-size: 13px;
    color: #554A41;
    line-height: 1.65;
    margin-bottom: 14px;
}

.recommend-text strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

/* 通知モックアップ (洗練されたUI風) */
.notification-mock {
    background-color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(197, 168, 128, 0.35);
    border-radius: 12px;
    padding: 12px 14px;
    box-shadow: 0 4px 12px rgba(60, 48, 40, 0.06);
    backdrop-filter: blur(4px);
}

.noti-header {
    display: flex;
    align-items: center;
    font-size: 11px;
    color: var(--color-text-light);
    margin-bottom: 4px;
}

.noti-icon {
    font-size: 12px;
    margin-right: 4px;
}

.noti-app {
    font-weight: 600;
    color: var(--color-text-sub);
}

.noti-time {
    margin-left: auto;
    font-size: 10.5px;
}

.noti-content {
    font-size: 13px;
    color: var(--color-text-main);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.noti-title {
    font-size: 12px;
    color: var(--color-text-sub);
}

.noti-code {
    font-size: 13.5px;
    font-weight: 500;
}

.noti-code strong {
    font-size: 15px;
    letter-spacing: 0.08em;
    color: var(--color-primary-dark);
}

/* ==========================================================================
   フッター
   ========================================================================== */
.main-footer {
    background-color: #302A26;
    color: #BDB6AF;
    padding: 24px 20px;
    text-align: center;
    margin-top: auto;
}

.footer-help {
    font-size: 12.5px;
    margin-bottom: 8px;
    color: #E2DBD4;
}

.footer-copy {
    font-size: 11px;
    color: #948C84;
}

/* ==========================================================================
   メディアクエリ (レスポンシブ微調整)
   ========================================================================== */
@media (max-width: 360px) {
    .main-title {
        font-size: 19px;
    }
    .flow-title {
        font-size: 15px;
    }
    .tab-btn {
        font-size: 13px;
        padding: 10px 8px;
    }
}