@charset "UTF-8";
/* ==========================================================================
   AMBIENCE SOUNDDESIGN — 全ページ共通スタイル
   EVERTONE スタイル（黒 × 白 × アクセント1色）
   ========================================================================== */

/* ========== 0. Fonts ==========
   Josefin Sans は同梱（SIL Open Font License 1.1 / assets/fonts/OFL.txt）。
   Google Fonts を参照しないので、オフラインでも file:// でも同じ見た目になる。
   可変フォントなので 1 ファイルで 300〜600 をまかなう。 */
@font-face {
    font-family: 'Josefin Sans';
    font-style: normal;
    font-weight: 100 700;
    font-display: swap;
    src: url('../fonts/josefin-sans-latin.woff2') format('woff2');
}

/* ========== 1. Variables ========== */
:root {
    /* Base */
    --color-black:      #000000;
    --color-white:      #ffffff;

    /* Accent */
    --color-accent:     #30bdff;

    /* Grays */
    --color-gray:       #666666;
    --color-gray-light: #cccccc;
    --color-gray-dark:  #333333;

    /* 黒地の上での半透明 */
    --w-70: rgba(255,255,255,0.70);
    --w-45: rgba(255,255,255,0.45);
    --w-12: rgba(255,255,255,0.12);
    --w-08: rgba(255,255,255,0.08);
    --w-05: rgba(255,255,255,0.05);

    /* Fonts */
    --font-title: 'Josefin Sans', 'Futura', sans-serif;
    --font-body:  'Helvetica Neue', 'Helvetica',
                  'Hiragino Kaku Gothic Pro', 'Meiryo', sans-serif;

    /* Layout */
    --header-height:   80px;
    --container-width: 1200px;
    --section-padding: 100px;

    --transition-fast:   0.3s ease;
    --transition-medium: 0.5s ease;
}

/* ========== 2. Reset & Base ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
img { max-width: 100%; height: auto; }

::selection { background: var(--color-accent); color: #000; }

.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden { display: none !important; }

/* ========== 3. Container / Section ========== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
}

.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--section-padding) 20px;
}

.eyebrow {
    font-family: var(--font-title);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin: 0 0 28px;
}

.section-title {
    font-family: var(--font-title);
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 300;
    letter-spacing: 0.1em;
    line-height: 1.05;
    text-transform: uppercase;
    margin-bottom: 28px;
}

.section-lead {
    font-size: 16px;
    line-height: 2;
    color: var(--w-70);
    max-width: 640px;
    margin-bottom: 60px;
}

/* ========== 4. Buttons ========== */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-family: var(--font-title);
    font-size: 14px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    border: 1px solid var(--color-white);
    background: transparent;
    color: var(--color-white);
    transition: all var(--transition-fast);
    cursor: pointer;
}
.btn-outline:hover { background: var(--color-white); color: var(--color-black); }

.btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #001018;
    font-weight: 600;
}
.btn-primary:hover { filter: brightness(1.12); }

/* ========== 5. Fixed Header ========== */
.fixed-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-fast);
}
.fixed-header.scrolled {
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* logo.png は logo.jpg から白抜き・背景透過に変換したもの（docs/07 参照） */
.logo img {
    height: 30px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* ========== 6. Hamburger ========== */
.hamburger {
    width: 30px; height: 20px;
    position: relative;
    background: none; border: none; cursor: pointer;
    z-index: 1001; padding: 0;
}
.hamburger span {
    position: absolute; left: 0;
    width: 100%; height: 2px;
    background: var(--color-white);
    transition: all var(--transition-fast);
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }
.hamburger.active span:nth-child(1) { top: 50%;    transform: translateY(-50%) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

/* ========== 7. Nav Overlay ========== */
.nav-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all var(--transition-medium);
    z-index: 999;
}
.nav-overlay.active { opacity: 1; visibility: visible; }

.nav-menu { text-align: center; }
.nav-menu li {
    margin: 15px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-fast);
}
.nav-overlay.active .nav-menu li { opacity: 1; transform: translateY(0); }
.nav-overlay.active .nav-menu li:nth-child(1) { transition-delay: 0.10s; }
.nav-overlay.active .nav-menu li:nth-child(2) { transition-delay: 0.12s; }
.nav-overlay.active .nav-menu li:nth-child(3) { transition-delay: 0.14s; }
.nav-overlay.active .nav-menu li:nth-child(4) { transition-delay: 0.16s; }
.nav-overlay.active .nav-menu li:nth-child(5) { transition-delay: 0.18s; }
.nav-overlay.active .nav-menu li:nth-child(6) { transition-delay: 0.20s; }

.nav-menu a {
    font-family: var(--font-title);
    font-size: 32px; font-weight: 300;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    position: relative;
    transition: color var(--transition-fast);
}
.nav-menu a::after {
    content: '';
    position: absolute; left: 0; bottom: -6px;
    width: 0; height: 1px;
    background: var(--color-accent);
    transition: width var(--transition-fast);
}
.nav-menu a:hover::after { width: 100%; }

/* ========== 8. Side Dot Nav ========== */
.side-nav { position: fixed; right: 30px; top: 50%; transform: translateY(-50%); z-index: 100; }
.side-nav ul { display: flex; flex-direction: column; gap: 20px; }
.side-nav a {
    display: block; width: 12px; height: 12px;
    border: 1px solid var(--color-white);
    border-radius: 50%;
    transition: all var(--transition-fast);
    position: relative;
}
.side-nav a::before {
    content: attr(data-label);
    position: absolute; right: 25px; top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-title);
    font-size: 12px; letter-spacing: 0.1em;
    white-space: nowrap; text-transform: uppercase;
    opacity: 0; transition: opacity var(--transition-fast);
}
.side-nav a:hover::before { opacity: 1; }
.side-nav a:hover,
.side-nav a.active { background: var(--color-white); transform: scale(1.3); }

/* ========== 9. Hero ========== */
.section-hero {
    background: #000;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100svh;
}

.hero-slideshow { position: absolute; inset: 0; z-index: 0; }
.hero-slideshow .slide {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transform: scale(1.0);
    transition: transform 8s ease-out, opacity 1.5s ease-in-out;
}
.hero-slideshow .slide.active { opacity: 1; transform: scale(1.09); }

.hero-overlay {
    position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(rgba(0,0,0,0.78), rgba(0,0,0,0.90));
}

.hero-content { position: relative; z-index: 2; padding: 0 20px; }

/* ロゴは画像を拡大せずタイポで組む */
.hero-logo {
    font-family: var(--font-title);
    font-weight: 300;
    font-size: clamp(44px, 11vw, 132px);
    letter-spacing: 0.28em;
    text-transform: uppercase;
    line-height: 1;
    margin: 0 0 22px;
    /* letter-spacing の分だけ右に寄るのを打ち消す */
    text-indent: 0.28em;
}
.hero-sub {
    font-family: var(--font-title);
    font-size: clamp(12px, 2.4vw, 18px);
    font-weight: 400;
    letter-spacing: 0.52em;
    text-transform: uppercase;
    color: var(--color-accent);
    text-indent: 0.52em;
    margin-bottom: 34px;
}
.hero-tagline {
    font-size: 14px;
    letter-spacing: 0.08em;
    color: var(--w-70);
    line-height: 2.2;
}

.scroll-indicator {
    position: absolute; bottom: 60px; left: 50%;
    transform: translateX(-50%);
    text-align: center; z-index: 2;
}
.scroll-indicator span {
    display: block;
    font-family: var(--font-title);
    font-size: 11px; letter-spacing: 0.2em;
    text-transform: uppercase; margin-bottom: 15px;
}
.scroll-line {
    width: 1px; height: 60px;
    background: var(--color-white);
    margin: 0 auto;
    animation: scrollLine 2s infinite;
}
@keyframes scrollLine {
    0%    { transform: scaleY(0); transform-origin: top; }
    50%   { transform: scaleY(1); transform-origin: top; }
    50.1% { transform: scaleY(1); transform-origin: bottom; }
    100%  { transform: scaleY(0); transform-origin: bottom; }
}

/* ========== 10. Reveal ========== */
.reveal    { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ========== 11. Numbers ========== */
.numbers {
    background: #000;
    padding: 110px 0 0;
    border-top: 1px solid var(--w-08);
    overflow: hidden;
    display: block;
    min-height: 0;
}
.numbers .eyebrow { text-align: center; margin-bottom: 56px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat  { text-align: center; display: flex; flex-direction: column; align-items: center; }
.num   {
    font-family: var(--font-title);
    font-weight: 300;
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.9;
    font-variant-numeric: tabular-nums;
    color: #fff;
}
.num .suffix { color: var(--color-accent); }
.lbl {
    font-family: var(--font-title);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 12px;
    color: var(--w-45);
    margin-top: 22px;
}

/* ティッカー */
.ticker {
    margin-top: 96px; padding: 20px 0;
    border-top: 1px solid var(--w-12);
    border-bottom: 1px solid var(--w-12);
    white-space: nowrap; position: relative;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
            mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track { display: inline-block; will-change: transform; animation: tickerScroll 60s linear infinite; }
@keyframes tickerScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.ticker-item {
    font-family: var(--font-title);
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--w-45);
    padding: 0 4px;
}
.tk-mk  { color: #fff; }
.tk-sep { color: var(--color-accent); padding: 0 18px; }

/* ========== 12. Cards (Service / Works / Products 共通) ========== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    width: 100%;
}

.content-card {
    background: var(--w-05);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 40px 30px;
    transition: all var(--transition-fast);
}
.content-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--color-accent);
}
.card-no {
    font-family: var(--font-title);
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--color-accent);
}
.card-title {
    font-family: var(--font-title);
    font-size: clamp(17px, 1.45vw, 21px);
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 16px 0 6px;
}
.card-title-ja {
    font-size: 13px;
    color: var(--w-45);
    letter-spacing: 0.08em;
    margin-bottom: 18px;
}
.card-body { font-size: 14px; line-height: 2; color: var(--w-70); }

/* ========== 13. Works Grid（写真） ========== */
.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    width: 100%;
}
.work-item {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--w-08);
    background: #050505;
}
.work-item img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    filter: grayscale(0.5) brightness(0.8);
    transition: transform var(--transition-medium), filter var(--transition-medium);
}
.work-item:hover img { transform: scale(1.05); filter: grayscale(0) brightness(1); }

.work-caption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 26px 16px 14px;
    background: linear-gradient(transparent, rgba(0,0,0,0.55) 34%, rgba(0,0,0,0.94));
}
.work-cat {
    font-family: var(--font-title);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-accent);
}
.work-name { font-size: 14px; letter-spacing: 0.04em; margin-top: 2px; }

/* ========== 13-b. Products ========== */
.product-group { width: 100%; margin-bottom: 56px; }
.product-group:last-child { margin-bottom: 0; }

.group-label {
    font-family: var(--font-title);
    font-size: 12px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--w-45);
    padding-bottom: 12px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--w-08);
}

.card-price {
    font-family: var(--font-title);
    font-size: 20px;
    letter-spacing: 0.06em;
    color: var(--color-accent);
    margin-top: 18px;
}
.card-note {
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--w-45);
    margin-top: 4px;
}
.shop-note {
    margin-top: 36px;
    font-size: 13px;
    color: var(--w-70);
}
.shop-note a { color: var(--color-accent); border-bottom: 1px solid transparent; }
.shop-note a:hover { border-bottom-color: var(--color-accent); }

/* ========== 13-c. Blog ========== */
/* 幅いっぱいだとタイトルと矢印が離れすぎるので、読みやすい幅に絞って中央へ */
.blog-list {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    border-top: 1px solid var(--w-08);
}

.blog-item {
    display: flex;
    align-items: baseline;
    gap: 22px;
    padding: 22px 4px;
    border-bottom: 1px solid var(--w-08);
    transition: background var(--transition-fast), padding-left var(--transition-fast);
}
.blog-item:hover { background: var(--w-05); padding-left: 14px; }

.blog-date {
    font-family: var(--font-title);
    font-size: 12px;
    letter-spacing: 0.14em;
    color: var(--w-45);
    flex: 0 0 88px;
    font-variant-numeric: tabular-nums;
}
.blog-cat {
    font-family: var(--font-title);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-accent);
    flex: 0 0 84px;
}
.blog-title { font-size: 15px; letter-spacing: 0.02em; flex: 1 1 auto; }
.blog-arrow { color: var(--w-45); font-size: 13px; transition: color var(--transition-fast); }
.blog-item:hover .blog-arrow { color: var(--color-accent); }

.blog-more { margin-top: 40px; text-align: center; }

/* ========== 14. Contact ========== */
.contact-form {
    width: 100%;
    max-width: 780px;
    margin: 0 auto 72px;
    text-align: left;
}

/* ハニーポット。画面外に飛ばして人間には触らせない */
.hp-field {
    position: absolute;
    left: -9999px;
    top: -9999px;
    height: 0;
    overflow: hidden;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 24px;
}

.form-group { margin-bottom: 26px; }

.form-group label {
    display: block;
    font-family: var(--font-title);
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--w-45);
    margin-bottom: 10px;
}
.form-group label .required {
    display: inline-block;
    margin-left: 8px;
    padding: 1px 7px;
    font-family: var(--font-body);
    font-size: 10px;
    letter-spacing: 0.04em;
    text-transform: none;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-white);
    background: var(--w-05);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 0;
    transition: border-color var(--transition-fast), background var(--transition-fast);
    -webkit-appearance: none;
       -moz-appearance: none;
            appearance: none;
}
.form-group textarea { resize: vertical; min-height: 150px; }

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.28); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255,255,255,0.08);
}

/* select の矢印を自前で描く（OS 標準の見た目を消しているため） */
.form-group select {
    padding-right: 44px;
    background-image:
        linear-gradient(45deg, transparent 50%, rgba(255,255,255,0.5) 50%),
        linear-gradient(135deg, rgba(255,255,255,0.5) 50%, transparent 50%);
    background-position:
        calc(100% - 22px) calc(50% + 1px),
        calc(100% - 16px) calc(50% + 1px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    cursor: pointer;
}
.form-group select option { background: #111; color: #fff; }

.form-note {
    font-size: 12px;
    color: var(--w-45);
    margin: 4px 0 28px;
}

.form-buttons { text-align: center; }
.form-buttons .btn { min-width: 260px; border: none; }

/* ========== 14-b. 送信結果ページ ========== */
.result-section { text-align: center; }
.result-inner   { max-width: 620px; }
.result-lead {
    font-size: 16px;
    line-height: 2.1;
    color: var(--w-70);
    margin-bottom: 28px;
}
.result-note {
    font-size: 13px;
    line-height: 2;
    color: var(--w-45);
    margin-bottom: 48px;
}
.result-note a { color: var(--color-accent); }


.contact-inner { text-align: center; }
.contact-lead {
    font-size: 15px;
    color: var(--w-70);
    line-height: 2.2;
    margin-bottom: 44px;
}
.contact-list {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.contact-item { text-align: center; }
.contact-item dt {
    font-family: var(--font-title);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--w-45);
    margin-bottom: 8px;
}
.contact-item dd {
    font-family: var(--font-title);
    font-size: 20px;
    letter-spacing: 0.06em;
}
.contact-item dd a:hover { color: var(--color-accent); }

/* ========== 15. Footer ========== */
.footer {
    border-top: 1px solid var(--w-08);
    padding: 44px 40px;
}
.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--w-45);
}
.footer-content a:hover { color: var(--color-accent); }

/* ========== 16. Back to Top ========== */
.back-to-top {
    position: fixed; right: 24px; bottom: 24px;
    width: 44px; height: 44px;
    border: 1px solid rgba(255,255,255,0.3);
    background: rgba(0,0,0,0.6);
    color: #fff; cursor: pointer;
    opacity: 0; pointer-events: none;
    transition: opacity var(--transition-fast);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 200;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }

/* ========== 16-b. 見出しの中央寄せ（デスクトップのみ） ==========
   各セクションの eyebrow・見出し・リード文を中央軸に揃える。
   カードや記事リストの中身は左寄せのまま（本文が読みにくくなるため）。
   狭い画面では行頭が揃わず読みにくいので 980px 以下は左寄せに戻す。 */
@media screen and (min-width: 981px) {
    .section > .container > .eyebrow,
    .section > .container > .section-title,
    .section > .container > .section-lead {
        text-align: center;
    }
    .section > .container > .section-lead {
        margin-left: auto;
        margin-right: auto;
    }
}

/* ========== 17. Responsive ========== */
@media screen and (max-width: 980px) {
    :root {
        --header-height:   60px;
        --section-padding: 80px;
    }
    .fixed-header { padding: 0 20px; }
    .side-nav     { display: none; }
    .container    { padding: 0 20px; }

    .section-title { font-size: clamp(36px, 10vw, 60px); margin-bottom: 20px; }
    .nav-menu a    { font-size: 24px; }

    .content-grid  { grid-template-columns: 1fr; }
    .works-grid    { grid-template-columns: repeat(2, 1fr); }
}

@media screen and (max-width: 600px) {
    .btn { padding: 12px 30px; font-size: 12px; }
    .stats { grid-template-columns: repeat(2, 1fr); gap: 44px 24px; }
    .content-card { padding: 30px 20px; }
    .contact-list { gap: 32px; }
    .form-row { grid-template-columns: 1fr; }
    .form-buttons .btn { width: 100%; min-width: 0; }

    /* 2列のままだとキャプションが2行になり、カテゴリラベルと詰まる */
    .work-caption { padding: 32px 12px 12px; }
    .work-cat  { font-size: 9px; letter-spacing: 0.14em; }
    .work-name { font-size: 12.5px; line-height: 1.55; margin-top: 3px; }
    .footer-content { flex-direction: column; gap: 14px; text-align: center; }
    .footer { padding: 36px 20px; }

    .blog-item { flex-wrap: wrap; gap: 4px 16px; padding: 18px 4px; }
    .blog-date { flex: 0 0 auto; }
    .blog-cat  { flex: 0 0 auto; }
    .blog-title { flex: 1 0 100%; }
    .blog-arrow { display: none; }
}

/* ========== 18. Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .ticker-track { animation: none; }
    .scroll-line  { animation: none; }
    .hero-slideshow .slide { transition: opacity 0.4s ease; transform: none; }
    .hero-slideshow .slide.active { transform: none; }
    .work-item img { transition: none; }
}