/* ============================================================
   V EFFECT Landing Page — 共通スタイル(日本語 / 英語)
   黒 × ゴールド。フォント: Outfit / Noto Sans JP / Inter
   ============================================================ */

:root {
    --bg: #000000;
    --surface: #0d0d0d;
    --surface-2: #141414;
    --text-primary: #ffffff;
    --text-secondary: #86868b;
    --gold: #D4AF37;
    --gold-soft: rgba(212, 175, 55, 0.45);
    --gold-glow: rgba(212, 175, 55, 0.10);
    --border: rgba(255, 255, 255, 0.10);

    --font-heading: 'Outfit', 'Inter', 'Noto Sans JP', sans-serif;
    --font-body: 'Noto Sans JP', 'Inter', sans-serif;
}

html:lang(en) {
    --font-body: 'Inter', 'Noto Sans JP', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

.container {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- ヘッダー ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 20px;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    text-decoration: none;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s ease;
}

.header-nav a:hover {
    color: var(--text-primary);
}

.lang-switch {
    border: 1px solid var(--border);
    border-radius: 980px;
    padding: 5px 14px;
    font-family: var(--font-heading);
    font-weight: 800;
    letter-spacing: 0.05em;
}

@media (max-width: 640px) {
    .header-nav a.nav-anchor {
        display: none;
    }
}

/* ---------- ヒーロー ---------- */
.hero {
    padding: 88px 0 72px;
    background:
        radial-gradient(ellipse 60% 50% at 70% 10%, rgba(212, 175, 55, 0.07), transparent),
        var(--bg);
}

.hero .container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
}

.hero-eyebrow {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.25em;
    color: var(--gold);
    margin-bottom: 20px;
}

.hero h1 {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: clamp(30px, 4.6vw, 46px);
    line-height: 1.35;
    letter-spacing: 0.01em;
    margin-bottom: 20px;
}

html:lang(en) .hero h1 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.15;
}

.hero-sub {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 30em;
    margin-bottom: 36px;
}

/* ---------- ストアボタン ---------- */
.store-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.store-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border-radius: 980px;
    padding: 14px 32px;
    color: #000000;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-weight: 700;
    font-size: 15px;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.10);
}

.store-button:hover {
    transform: scale(1.03);
    background: #f5f5f7;
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
}

.store-button:active {
    transform: scale(0.98);
}

.store-icon {
    margin-right: 8px;
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.store-chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: 980px;
    padding: 13px 24px;
    color: var(--text-secondary);
    font-size: 13px;
}

/* Web版アプリへのリンク(ゴールドのアウトラインボタン) */
.store-button--web {
    background: transparent;
    color: var(--gold);
    border: 1px solid var(--gold-soft);
    box-shadow: none;
}

.store-button--web:hover {
    background: var(--gold-glow);
    box-shadow: 0 6px 20px var(--gold-glow);
}

/* ---------- デバイスフレーム ---------- */
.device {
    border: 1px solid var(--gold-soft);
    border-radius: 44px;
    padding: 10px;
    background: #0a0a0a;
    box-shadow: 0 0 70px var(--gold-glow);
}

.device img {
    border-radius: 34px;
}

.hero-visual {
    max-width: 340px;
    margin: 0 auto;
}

@media (max-width: 860px) {
    .hero {
        padding: 56px 0;
    }
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    .hero-sub {
        margin-left: auto;
        margin-right: auto;
    }
    .store-row {
        justify-content: center;
    }
    .hero-visual {
        max-width: 280px;
    }
}

/* ---------- 共感コピー帯 ---------- */
.empathy {
    padding: 96px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.empathy p {
    font-size: clamp(18px, 2.6vw, 24px);
    font-weight: 500;
    line-height: 2.1;
    max-width: 27em;
    margin: 0 auto;
}

.empathy .em-question {
    color: var(--text-secondary);
}

.empathy .em-answer {
    margin-top: 28px;
}

.empathy .gold {
    color: var(--gold);
}

/* ---------- セクション共通 ---------- */
.section-head {
    text-align: center;
    margin-bottom: 64px;
}

.section-eyebrow {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.25em;
    color: var(--gold);
    margin-bottom: 14px;
}

.section-title {
    font-size: clamp(24px, 3.4vw, 34px);
    font-weight: 700;
    line-height: 1.4;
}

/* ---------- 機能紹介 ---------- */
.features {
    padding: 96px 0;
    border-top: 1px solid var(--border);
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 56px 0;
}

.feature-row:nth-of-type(even) .feature-visual {
    order: -1;
}

.feature-visual {
    max-width: 300px;
    margin: 0 auto;
}

.feature-eyebrow {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.25em;
    color: var(--gold);
    margin-bottom: 16px;
}

.feature-copy h2 {
    font-size: clamp(24px, 3.2vw, 32px);
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 18px;
}

html:lang(en) .feature-copy h2 {
    line-height: 1.25;
}

.feature-copy p {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 32em;
}

@media (max-width: 860px) {
    .features {
        padding: 72px 0;
    }
    .feature-row {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        padding: 44px 0;
    }
    .feature-row:nth-of-type(even) .feature-visual {
        order: 0;
    }
    .feature-visual {
        max-width: 250px;
    }
    .feature-copy p {
        margin: 0 auto;
    }
}

/* ---------- 使い方 3ステップ ---------- */
.how {
    padding: 96px 0;
    border-top: 1px solid var(--border);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 36px 28px;
}

.step-num {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 800;
    color: var(--gold);
    line-height: 1;
    margin-bottom: 20px;
}

.step-card p {
    font-size: 15px;
    line-height: 1.8;
}

@media (max-width: 860px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- ギャラリー ---------- */
.gallery {
    padding: 96px 0;
    border-top: 1px solid var(--border);
}

.gallery-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 12px 24px 28px;
    max-width: 1080px;
    margin: 0 auto;
    scrollbar-width: thin;
    scrollbar-color: var(--gold-soft) transparent;
}

.gallery-track .device {
    flex: 0 0 auto;
    width: 220px;
    scroll-snap-align: center;
    border-radius: 34px;
    padding: 8px;
}

.gallery-track .device img {
    border-radius: 26px;
}

.gallery-note {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* ---------- 最終CTA ---------- */
.cta {
    padding: 112px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    background:
        radial-gradient(ellipse 55% 60% at 50% 100%, rgba(212, 175, 55, 0.07), transparent),
        var(--bg);
}

.cta h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
}

html:lang(en) .cta h2 {
    font-family: var(--font-heading);
    font-weight: 800;
}

.cta p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 36px;
}

.cta .store-row {
    justify-content: center;
}

/* ---------- フッター ---------- */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 48px 24px;
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 28px;
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

.copyright {
    margin-top: 8px;
}

/* ---------- ブログ: 一覧ヒーロー ---------- */
.blog-hero {
    padding: 88px 0 56px;
    text-align: center;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(212, 175, 55, 0.07), transparent),
        var(--bg);
}

.blog-hero h1 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
}

.blog-hero .hero-sub {
    margin: 0 auto;
}

/* ---------- ブログ: カードグリッド(一覧・関連記事共通) ---------- */
.blog-list {
    padding: 24px 0 96px;
}

.blog-related {
    padding: 80px 0;
    border-top: 1px solid var(--border);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px 26px;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.blog-card:hover {
    border-color: var(--gold-soft);
    transform: translateY(-2px);
}

.blog-card-cat {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--gold);
    margin-bottom: 12px;
}

.blog-card-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
}

.blog-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

.blog-card-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 18px;
}

/* ---------- ブログ: 記事詳細 ---------- */
.blog-article {
    padding: 72px 0 32px;
}

.blog-article-inner {
    max-width: 720px;
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.blog-meta .blog-card-cat {
    margin-bottom: 0;
}

.blog-meta-date {
    font-size: 13px;
    color: var(--text-secondary);
}

.blog-article h1 {
    font-size: clamp(26px, 4vw, 36px);
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 40px;
}

.blog-body {
    font-size: 16px;
    color: var(--text-primary);
}

.blog-body h2 {
    font-size: clamp(20px, 2.8vw, 26px);
    font-weight: 700;
    margin: 48px 0 20px;
}

.blog-body h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 32px 0 14px;
}

.blog-body p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

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

.blog-body ul,
.blog-body ol {
    margin: 0 0 20px 1.4em;
    color: var(--text-secondary);
}

.blog-body li {
    margin-bottom: 8px;
}

.blog-body blockquote {
    border-left: 2px solid var(--gold-soft);
    background: var(--gold-glow);
    padding: 16px 24px;
    margin: 28px 0;
    color: var(--text-primary);
    font-size: 15px;
    border-radius: 0 12px 12px 0;
}

.blog-body blockquote p:last-child {
    margin-bottom: 0;
}

.blog-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 14px;
}

.blog-body th,
.blog-body td {
    border: 1px solid var(--border);
    padding: 12px 16px;
    text-align: left;
}

.blog-body th {
    background: var(--surface-2);
    color: var(--gold);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
}

.blog-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 40px 0;
}

@media (max-width: 640px) {
    .blog-article {
        padding: 48px 0 16px;
    }
    .blog-body table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}

/* ---------- モーション低減 ---------- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .store-button,
    .store-button:hover,
    .store-button:active {
        transition: none;
        transform: none;
    }
}