/* =========================================================
   A Knots Label — styles.css
   premium B2B / 結び目(knot)モチーフ
   ========================================================= */

:root {
  --ink:        #16202c;   /* 墨紺 */
  --ink-soft:   #36434f;
  --paper:      #f7f4ee;   /* オフホワイト */
  --paper-2:    #efe9df;
  --gold:       #b08b4f;   /* 金 */
  --gold-deep:  #8c6c38;
  --line:       #d8cfbf;
  --white:      #ffffff;
  --max:        1120px;
  --max-narrow: 760px;
  --radius:     4px;
  --shadow:     0 18px 50px -28px rgba(22, 32, 44, 0.45);
  --serif: "Noto Serif JP", "Cormorant Garamond", serif;
  --sans:  "Noto Sans JP", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.85;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: var(--max-narrow); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.brand-mark { color: var(--gold); font-size: 1.25rem; }
.brand-name { font-size: 1.05rem; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a {
  text-decoration: none;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  transition: color 0.2s;
}
.nav a:hover { color: var(--gold-deep); }
.nav-cta {
  border: 1px solid var(--gold);
  color: var(--gold-deep) !important;
  padding: 8px 16px;
  border-radius: var(--radius);
}
.nav-cta:hover { background: var(--gold); color: var(--white) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 14px 28px;
  border-radius: var(--radius);
  transition: transform 0.15s, background 0.2s, color 0.2s, box-shadow 0.2s;
  cursor: pointer;
  font-size: 0.95rem;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
}
.btn-primary:hover { background: #0e1822; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--white); }
.btn-outline {
  background: transparent;
  color: var(--gold-deep);
  border: 1px solid var(--gold);
}
.btn-outline:hover { background: var(--gold); color: var(--white); }
.btn-lg { padding: 18px 44px; font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 96px;
  background:
    radial-gradient(120% 90% at 80% -10%, rgba(176, 139, 79, 0.12), transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  overflow: hidden;
}
.hero::after {
  content: "⟡";
  position: absolute;
  right: -40px;
  bottom: -60px;
  font-size: 22rem;
  color: rgba(176, 139, 79, 0.08);
  line-height: 1;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.hero-en {
  font-family: "Cormorant Garamond", var(--serif);
  font-style: italic;
  color: var(--gold-deep);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  margin: 0 0 18px;
}
.hero-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.2vw, 3.6rem);
  line-height: 1.35;
  margin: 0 0 24px;
  letter-spacing: 0.02em;
}
.hero-lead {
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 32px;
}
.hero-lead strong { color: var(--ink); font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.hero-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding: 0;
  margin: 0;
}
.hero-badges li {
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--gold-deep);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  padding: 6px 14px;
  border-radius: 999px;
}

/* ---------- Section base ---------- */
.section { padding: 92px 0; }
.section:nth-of-type(even) { background: var(--white); }
.eyebrow {
  font-family: "Cormorant Garamond", var(--serif);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-deep);
  font-size: 0.85rem;
  margin: 0 0 14px;
}
.section-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.4;
  margin: 0 0 40px;
  letter-spacing: 0.02em;
}

/* ---------- 01 Position ---------- */
.position-body { max-width: 760px; font-size: 1.02rem; color: var(--ink-soft); }
.position-body p { margin: 0 0 18px; }
.position-emphasis {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink);
  margin-top: 28px !important;
  padding-left: 18px;
  border-left: 3px solid var(--gold);
}

/* ---------- 02 Problem ---------- */
.problem-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.problem-grid li {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  position: relative;
}
.problem-no {
  font-family: "Cormorant Garamond", var(--serif);
  font-size: 1.6rem;
  color: var(--gold);
  display: block;
  margin-bottom: 8px;
}
.problem-grid h3 { font-size: 1.05rem; margin: 0 0 8px; }
.problem-grid p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- Strength ---------- */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.strength-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
}
.strength-no {
  font-family: "Cormorant Garamond", var(--serif);
  font-size: 2.2rem;
  color: var(--gold);
  margin: 0 0 6px;
}
.strength-card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin: 0 0 14px;
}
.strength-card p { margin: 0 0 12px; color: var(--ink-soft); font-size: 0.95rem; }
.strength-card strong { color: var(--ink); }
.strength-note {
  font-size: 0.8rem !important;
  color: var(--gold-deep) !important;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  margin-top: 14px !important;
}

/* ---------- Accountability ---------- */
.acc-em { color: var(--gold-deep); }
.acc-lead {
  max-width: 760px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  margin: 0 0 40px;
}
.acc-lead strong { color: var(--ink); }
.acc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.acc-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 28px 28px;
}
.acc-icon { color: var(--gold); font-size: 1.2rem; line-height: 1; }
.acc-card h3 { font-size: 1.08rem; margin: 0; }
.acc-card p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
.acc-note {
  margin-top: 28px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  max-width: 860px;
}

/* ---------- Samples ---------- */
.samples-lead { max-width: 720px; color: var(--ink-soft); margin: 0 0 40px; }
.samples-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: start;
}

/* Nutrition Facts (FDA style) */
.nf-label {
  background: var(--white);
  color: #000;
  border: 2px solid #000;
  border-radius: 2px;
  padding: 8px 10px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.25;
  box-shadow: var(--shadow);
  max-width: 320px;
}
.nf-title {
  font-weight: 900;
  font-size: 2rem;
  letter-spacing: -0.04em;
  margin: 0;
  line-height: 1;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.nf-line { margin: 0; font-size: 0.78rem; }
.nf-servings { margin-top: 2px; }
.nf-serving { display: flex; justify-content: space-between; font-weight: 700; }
.nf-rule { background: #000; margin: 4px 0; }
.nf-rule-lg { height: 9px; }
.nf-rule-md { height: 4px; }
.nf-amount-label { font-size: 0.7rem; font-weight: 700; margin: 0; }
.nf-calories {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-weight: 900;
  margin: 0;
  border-bottom: 4px solid #000;
  padding-bottom: 2px;
}
.nf-calories span:first-child { font-size: 1.05rem; }
.nf-calories span:last-child { font-size: 1.7rem; }
.nf-dv { text-align: right; font-size: 0.7rem; font-weight: 700; margin: 2px 0; }
.nf-row {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid #000;
  padding: 1px 0;
}
.nf-indent { padding-left: 14px; }
.nf-indent2 { padding-left: 26px; }
.nf-footnote { font-size: 0.62rem; line-height: 1.3; margin: 4px 0 0; }

/* Sample text blocks */
.sample-text { display: flex; flex-direction: column; gap: 26px; }
.sample-block h3 {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold-deep);
  margin: 0 0 6px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}
.sample-block p { margin: 0 0 4px; font-size: 0.95rem; color: var(--ink-soft); }
.sample-block strong { color: var(--ink); }
.sample-small { font-size: 0.78rem !important; color: var(--gold-deep) !important; }
.samples-disclaimer { font-size: 0.82rem; color: var(--ink-soft); margin-top: 32px; }

/* ---------- Process ---------- */
.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: none;
}
.process-list li {
  display: flex;
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.process-list li:last-child { border-bottom: none; }
.process-no {
  flex: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  color: var(--gold-deep);
  font-family: "Cormorant Garamond", var(--serif);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.process-list h3 { font-size: 1.08rem; margin: 6px 0 6px; }
.process-list p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.plan-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
}
.plan-featured {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  box-shadow: var(--shadow);
}
.plan-featured .plan-sub,
.plan-featured .plan-features { color: rgba(247, 244, 238, 0.78); }
.plan-badge {
  position: absolute;
  top: -12px;
  left: 30px;
  background: var(--gold);
  color: var(--white);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 4px 14px;
  border-radius: 999px;
  margin: 0;
}
.plan-name {
  font-family: "Cormorant Garamond", var(--serif);
  font-size: 1.6rem;
  letter-spacing: 0.06em;
  margin: 0;
}
.plan-sub { font-size: 0.85rem; color: var(--ink-soft); margin: 2px 0 18px; }
.plan-price {
  font-family: var(--serif);
  font-size: 1.7rem;
  margin: 0 0 22px;
}
.plan-period { font-size: 0.9rem; }
.plan-tax { font-size: 0.75rem; opacity: 0.7; }
.plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  flex: 1;
}
.plan-features li {
  font-size: 0.9rem;
  padding: 8px 0 8px 22px;
  position: relative;
  border-bottom: 1px dashed var(--line);
}
.plan-featured .plan-features li { border-color: rgba(255, 255, 255, 0.14); }
.plan-features li::before {
  content: "⟡";
  position: absolute;
  left: 0;
  color: var(--gold);
}
.pricing-intro {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: -22px 0 44px;
  max-width: 640px;
}
.pricing-group { margin-bottom: 52px; }
.pricing-group-title {
  font-family: var(--serif);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.pricing-group-title span {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  background: var(--ink);
  color: var(--paper);
  padding: 4px 12px;
  border-radius: 999px;
}
.pricing-group-lead {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 14px 0 24px;
  max-width: 720px;
}
.pricing-group-lead strong { color: var(--ink); }
.pricing-grid-2 { grid-template-columns: repeat(2, 1fr); }
.plan-badge-gold { background: var(--gold); }

.addon-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}
.addon-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}
.addon-list li:last-child { border-bottom: none; }
.addon-name { color: var(--ink); }
.addon-price { color: var(--gold-deep); font-weight: 500; white-space: nowrap; }

.pricing-notes {
  margin-top: 36px;
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.pricing-notes p { margin: 0 0 8px; }

/* ---------- Clients ---------- */
.clients-lead { max-width: 680px; color: var(--ink-soft); margin: 0 0 36px; }
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.client-slot {
  aspect-ratio: 3 / 2;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  color: var(--ink-soft);
  background: var(--paper);
}
.client-slot span { font-size: 0.72rem; color: var(--gold-deep); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 24px;
  font-weight: 500;
  font-size: 0.98rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  color: var(--gold);
  font-size: 1.4rem;
  flex: none;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body {
  padding: 0 24px 22px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.faq-body p { margin: 0 0 8px; }
.faq-body p:last-child { margin-bottom: 0; }

/* ---------- Closing ---------- */
.closing {
  background:
    radial-gradient(100% 80% at 50% 0%, rgba(176, 139, 79, 0.14), transparent 60%),
    var(--ink);
  color: var(--paper);
  text-align: center;
}
.closing-inner { display: flex; flex-direction: column; align-items: center; }
.closing .hero-en { color: var(--gold); }
.closing-title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 16px;
}
.closing-lead { color: rgba(247, 244, 238, 0.82); margin: 0 0 30px; }
.closing-mail { margin-top: 22px; font-size: 0.9rem; color: rgba(247, 244, 238, 0.7); }
.closing-mail a { color: var(--gold); }

/* ---------- Contact form ---------- */
.contact-form {
  width: 100%;
  max-width: 620px;
  margin: 8px auto 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 0.85rem;
  color: rgba(247, 244, 238, 0.9);
  letter-spacing: 0.02em;
}
.field-cap { display: inline-flex; align-items: center; }
.contact-form .req,
.contact-form .opt {
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  line-height: 1.4;
}
.contact-form .req { background: var(--gold); color: var(--white); }
.contact-form .opt { background: rgba(247, 244, 238, 0.18); color: rgba(247, 244, 238, 0.8); }
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form textarea { resize: vertical; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(176, 139, 79, 0.25);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: #9aa1a8; }
.form-submit { margin-top: 8px; align-self: center; cursor: pointer; border: none; }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.form-status {
  text-align: center;
  font-size: 0.9rem;
  margin: 6px 0 0;
  min-height: 1.2em;
}
.form-status.is-ok { color: var(--gold); }
.form-status.is-err { color: #ff9b8a; }

/* ---------- Footer ---------- */
.site-footer { background: #0e1822; color: rgba(247, 244, 238, 0.7); padding: 56px 0 28px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1.4fr 1fr;
  gap: 36px;
  align-items: start;
}
.footer-brand .brand-name { color: var(--paper); font-family: var(--serif); }
.footer-tagline { font-size: 0.82rem; margin: 10px 0 0; }
.footer-info p { margin: 0 0 6px; font-size: 0.86rem; }
.footer-info a { color: var(--gold); }
.footer-nav { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a { text-decoration: none; font-size: 0.86rem; }
.footer-nav a:hover { color: var(--gold); }
.footer-copy {
  text-align: center;
  font-size: 0.76rem;
  color: rgba(247, 244, 238, 0.4);
  margin: 40px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 18px 24px 24px;
    gap: 16px;
  }
  .nav-toggle { display: block; }
  .strength-grid,
  .pricing-grid,
  .pricing-grid-2,
  .samples-grid { grid-template-columns: 1fr; }
  .addon-list li { flex-direction: column; gap: 4px; }
  .form-row { grid-template-columns: 1fr; }
  .problem-grid,
  .acc-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .nf-label { margin: 0 auto; }
}