/* ==========================================================================
   subroq.css — HP刷新デザインシステム
   静かな知性 × 親しみ / 柔らかめトーン
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
    --color-bg:           #FAFAF7;
    --color-bg-alt:       #F3F2EC;
    --color-surface:      #FFFFFF;
    --color-border:       #E8E6DD;
    --color-border-soft:  #EFEDE4;
    --color-ink:          #1A1A1A;
    --color-ink-2:        #3A3A3A;
    --color-muted:        #6E6E66;
    --color-muted-2:      #9A998E;
    --color-accent:       #1F3D2B;   /* 深緑 */
    --color-accent-soft:  #E6EDE7;
    --color-accent-ink:   #132419;
    --color-gold:         #B38B3A;   /* アクセント差し色 */

    --font-sans: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
    --font-serif: 'Hiragino Mincho ProN', 'Yu Mincho', 'Noto Serif JP', serif;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, monospace;

    --radius-sm: 6px;
    --radius:    10px;
    --radius-lg: 18px;

    --shadow-sm: 0 1px 2px rgba(20, 20, 15, 0.04), 0 1px 1px rgba(20, 20, 15, 0.03);
    --shadow:    0 6px 24px -12px rgba(20, 20, 15, 0.12), 0 2px 6px -2px rgba(20, 20, 15, 0.05);
    --shadow-lg: 0 24px 60px -24px rgba(20, 20, 15, 0.18);

    --container:    1180px;
    --container-sm: 820px;

    --ease: cubic-bezier(.2,.7,.2,1);
}

/* ---------- Reset (namespaced — only affects .sq-* pages) ---------- */
.sq *,
.sq *::before,
.sq *::after { box-sizing: border-box; }

.sq {
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.8;
    font-feature-settings: "palt";
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.01em;
}

.sq img { max-width: 100%; height: auto; display: block; }
.sq a   { color: inherit; text-decoration: none; }

/* ---------- Layout primitives ---------- */
.sq-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}
.sq-container--narrow {
    max-width: var(--container-sm);
    margin: 0 auto;
    padding: 0 24px;
}

.sq-section {
    padding: 96px 0;
}
.sq-section--tight { padding: 64px 0; }
.sq-section--alt   { background: var(--color-bg-alt); }

@media (max-width: 720px) {
    .sq-section { padding: 64px 0; }
    .sq-section--tight { padding: 48px 0; }
}

/* ---------- Typography ---------- */
.sq-eyebrow {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 600;
    font-family: var(--font-mono);
    margin-bottom: 16px;
}
.sq-eyebrow::before {
    content: "";
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-accent);
    vertical-align: middle;
    margin-right: 12px;
}

.sq-h1 {
    font-size: clamp(32px, 5vw, 56px);
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 24px;
}
.sq-h2 {
    font-size: clamp(26px, 3.4vw, 38px);
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: -0.005em;
    margin: 0 0 20px;
}
.sq-h3 {
    font-size: clamp(20px, 2.2vw, 24px);
    line-height: 1.5;
    font-weight: 700;
    margin: 0 0 12px;
}
.sq-lead {
    font-size: clamp(16px, 1.6vw, 19px);
    line-height: 1.9;
    color: var(--color-ink-2);
    margin: 0 0 24px;
}
.sq-body  { font-size: 16px; color: var(--color-ink-2); }
.sq-muted { color: var(--color-muted); }
.sq-small { font-size: 13px; color: var(--color-muted); }

.sq-mono { font-family: var(--font-mono); }

/* ---------- Header ---------- */
.sq-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 250, 247, 0.85);
    backdrop-filter: saturate(140%) blur(12px);
    -webkit-backdrop-filter: saturate(140%) blur(12px);
    border-bottom: 1px solid var(--color-border-soft);
}
.sq-header__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.sq-logo {
    display: inline-flex;
    align-items: center;
    line-height: 1;
    color: var(--color-ink);
}
.sq-logo img { height: 34px; width: auto; display: block; }
.sq-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.sq-nav a {
    font-size: 14px;
    color: var(--color-ink-2);
    font-weight: 500;
    transition: color .25s var(--ease);
}
.sq-nav a:hover { color: var(--color-accent); }

.sq-header__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    background: var(--color-ink);
    color: #FAFAF7 !important;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    text-decoration: none;
    transition: transform .25s var(--ease), background .25s var(--ease);
}
.sq-header__cta:hover {
    background: var(--color-accent);
    color: #FAFAF7 !important;
    transform: translateY(-1px);
}

.sq-burger {
    display: none;
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
    padding: 0;
    color: var(--color-ink);
}
.sq-burger span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: currentColor;
    margin: 5px auto;
    transition: transform .3s var(--ease), opacity .3s var(--ease);
}

@media (max-width: 900px) {
    .sq-nav, .sq-header__cta { display: none; }
    .sq-burger { display: inline-flex; align-items: center; justify-content: center; }
    .sq-mobile-nav { display: none; }
    .sq-mobile-nav.is-open {
        display: block;
        position: fixed;
        top: 68px; left: 0; right: 0; bottom: 0;
        background: var(--color-bg);
        padding: 32px 24px;
        z-index: 99;
    }
    .sq-mobile-nav ul { list-style: none; padding: 0; margin: 0; }
    .sq-mobile-nav li { border-bottom: 1px solid var(--color-border-soft); }
    .sq-mobile-nav a {
        display: block;
        padding: 20px 0;
        font-size: 17px;
        color: var(--color-ink);
    }
}
@media (min-width: 901px) {
    .sq-mobile-nav { display: none; }
}

/* ---------- Hero ---------- */
.sq-hero {
    position: relative;
    padding: 120px 0 96px;
    overflow: hidden;
}
.sq-hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(31, 61, 43, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(31, 61, 43, 0.04) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse at top right, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at top right, black 30%, transparent 75%);
    pointer-events: none;
}
.sq-hero__inner {
    position: relative;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}
.sq-hero__kicker {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 24px;
}
.sq-hero__title {
    font-size: clamp(36px, 6.5vw, 72px);
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin: 0 0 28px;
    max-width: 18ch;
}
.sq-hero__title em {
    font-style: normal;
    color: var(--color-accent);
    position: relative;
}
.sq-hero__title em::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 2px;
    height: 10px;
    background: var(--color-accent-soft);
    z-index: -1;
    border-radius: 2px;
}
.sq-hero__sub {
    font-size: clamp(16px, 1.8vw, 20px);
    line-height: 1.9;
    color: var(--color-ink-2);
    max-width: 38ch;
    margin: 0 0 40px;
}
.sq-hero__cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 56px;
}

/* ---------- Buttons ---------- */
.sq-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .25s var(--ease);
}
.sq-btn--primary {
    background: var(--color-ink);
    color: var(--color-bg);
}
.sq-btn--primary:hover {
    background: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}
.sq-btn--ghost {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-border);
}
.sq-btn--ghost:hover {
    border-color: var(--color-ink);
    background: var(--color-surface);
}
.sq-btn__arrow { transition: transform .25s var(--ease); }
.sq-btn:hover .sq-btn__arrow { transform: translateX(4px); }

/* ---------- Hero badges bar ---------- */
.sq-hero__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 32px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border-soft);
}
.sq-hero__badges div {
    font-size: 13px;
    color: var(--color-muted);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.sq-hero__badges strong {
    color: var(--color-ink);
    font-weight: 600;
    font-size: 14px;
}
.sq-hero__badges div::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    display: inline-block;
}

/* ---------- Section head ---------- */
.sq-sec-head {
    max-width: 760px;
    margin-bottom: 56px;
}
.sq-sec-head__sub {
    font-size: 16px;
    color: var(--color-muted);
    line-height: 1.9;
}

/* ---------- Cards grid ---------- */
.sq-grid {
    display: grid;
    gap: 24px;
}
.sq-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sq-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sq-grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
    .sq-grid--3, .sq-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .sq-grid--2, .sq-grid--3, .sq-grid--4 { grid-template-columns: 1fr; }
}

/* ---------- Card ---------- */
.sq-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
    height: 100%;
    position: relative;
    overflow: hidden;
}
.sq-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow);
}
.sq-card__num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-muted-2);
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}
.sq-card__title {
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 10px;
    line-height: 1.5;
}
.sq-card__lead {
    font-size: 15px;
    color: var(--color-ink-2);
    line-height: 1.8;
    margin: 0 0 20px;
}
.sq-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.sq-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-bg-alt);
    color: var(--color-muted);
    border-radius: 999px;
    font-size: 11px;
    font-family: var(--font-mono);
    letter-spacing: 0.03em;
}
.sq-tag--accent {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}
.sq-card__link {
    margin-top: auto;
    color: var(--color-accent);
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.sq-card__link::after {
    content: "→";
    transition: transform .25s var(--ease);
}
.sq-card:hover .sq-card__link::after { transform: translateX(4px); }

/* ---------- Persona strip ---------- */
.sq-personas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}
.sq-personas__item {
    padding: 8px 0;
}
.sq-personas__label {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}
.sq-personas__text {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.6;
    color: var(--color-ink);
}
@media (max-width: 800px) {
    .sq-personas { grid-template-columns: 1fr; }
}

/* ---------- About block ---------- */
.sq-about {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 64px;
    align-items: start;
}
.sq-about dl {
    margin: 0;
    display: grid;
    gap: 20px;
}
.sq-about dt {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-muted);
    letter-spacing: 0.1em;
    margin-bottom: 4px;
    text-transform: uppercase;
}
.sq-about dd {
    margin: 0;
    font-size: 15px;
    color: var(--color-ink-2);
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border-soft);
}
.sq-about dd:last-child { border-bottom: 0; }
@media (max-width: 800px) {
    .sq-about { grid-template-columns: 1fr; gap: 32px; }
}

/* ---------- Timeline ---------- */
.sq-timeline {
    position: relative;
    padding-left: 32px;
    border-left: 1px dashed var(--color-border);
    margin: 0;
    list-style: none;
}
.sq-timeline li {
    position: relative;
    padding: 0 0 32px 0;
}
.sq-timeline li::before {
    content: "";
    position: absolute;
    left: -38px;
    top: 8px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-accent);
}
.sq-timeline__year {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-accent);
    margin-bottom: 4px;
}
.sq-timeline__title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}
.sq-timeline__desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.7;
}

/* ---------- Work page spec table ---------- */
.sq-spec {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 0;
    border-top: 1px solid var(--color-border);
}
.sq-spec > div {
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}
.sq-spec dt {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--color-muted);
    text-transform: uppercase;
}
.sq-spec dd {
    margin: 0;
    font-size: 15px;
    color: var(--color-ink);
}

/* ---------- FAQ ---------- */
.sq-faq details {
    border-bottom: 1px solid var(--color-border-soft);
    padding: 20px 0;
}
.sq-faq summary {
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    font-size: 16px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}
.sq-faq summary::-webkit-details-marker { display: none; }
.sq-faq summary::after {
    content: "+";
    font-family: var(--font-mono);
    font-size: 20px;
    color: var(--color-accent);
    transition: transform .25s var(--ease);
}
.sq-faq details[open] summary::after { transform: rotate(45deg); }
.sq-faq details > p {
    margin: 16px 0 0;
    color: var(--color-muted);
    font-size: 15px;
    line-height: 1.9;
}

/* ---------- CTA block ---------- */
.sq-cta {
    background: var(--color-ink);
    color: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 72px 56px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.sq-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(31, 61, 43, 0.35), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(179, 139, 58, 0.15), transparent 50%);
    pointer-events: none;
}
.sq-cta > * { position: relative; }
.sq-cta h2 {
    font-size: clamp(26px, 3.4vw, 40px);
    margin: 0 0 16px;
    color: #fff;
}
.sq-cta p {
    color: #c9c7bb;
    font-size: 16px;
    margin: 0 0 32px;
}
.sq-cta .sq-btn--primary {
    background: var(--color-bg);
    color: var(--color-ink);
}
.sq-cta .sq-btn--primary:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}
@media (max-width: 700px) {
    .sq-cta { padding: 48px 28px; }
}

/* ---------- Footer ---------- */
.sq-footer {
    padding: 80px 0 40px;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border-soft);
}
.sq-footer__grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 56px;
}
.sq-footer__brand p {
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.8;
    margin: 16px 0 0;
    max-width: 32ch;
}
.sq-footer h4 {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--color-muted-2);
    text-transform: uppercase;
    margin: 0 0 16px;
    font-weight: 600;
}
.sq-footer ul { list-style: none; padding: 0; margin: 0; }
.sq-footer li { margin-bottom: 10px; }
.sq-footer a {
    font-size: 14px;
    color: var(--color-ink-2);
    transition: color .25s var(--ease);
}
.sq-footer a:hover { color: var(--color-accent); }
.sq-footer__bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--color-muted);
    flex-wrap: wrap;
    gap: 12px;
}
@media (max-width: 800px) {
    .sq-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 500px) {
    .sq-footer__grid { grid-template-columns: 1fr; }
}

/* ---------- Contact form ---------- */
.sq-form {
    display: grid;
    gap: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}
.sq-form label {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 8px;
    font-weight: 600;
}
.sq-form label .req {
    color: var(--color-gold);
    margin-left: 4px;
}
.sq-form input[type="text"],
.sq-form input[type="email"],
.sq-form input[type="tel"],
.sq-form select,
.sq-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 15px;
    color: var(--color-ink);
    transition: border-color .2s var(--ease), background .2s var(--ease);
}
.sq-form input:focus,
.sq-form select:focus,
.sq-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
}
.sq-form textarea { resize: vertical; min-height: 140px; }
.sq-form .sq-form__note {
    font-size: 12px;
    color: var(--color-muted);
    margin: 0;
}

/* ---------- Page header ---------- */
.sq-page-head {
    padding: 120px 0 72px;
    border-bottom: 1px solid var(--color-border-soft);
}
.sq-page-head__breadcrumbs {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-muted);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}
.sq-page-head__breadcrumbs a:hover { color: var(--color-accent); }

/* ---------- Prose (article body) ---------- */
.sq-prose {
    max-width: 720px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 2;
    color: var(--color-ink-2);
}
.sq-prose h2 {
    font-size: 24px;
    margin: 56px 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-ink);
}
.sq-prose h3 {
    font-size: 19px;
    margin: 40px 0 12px;
    color: var(--color-ink);
}
.sq-prose p { margin: 0 0 20px; }
.sq-prose ul, .sq-prose ol { padding-left: 24px; margin: 0 0 20px; }
.sq-prose li { margin-bottom: 8px; }

/* ---------- Reveal on scroll ---------- */
.sq-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.sq-reveal.is-in {
    opacity: 1;
    transform: translateY(0);
}