/* ======================================================================
   iThinks Corporate Site — Shared Styles
   Design tokens: v6.2 Brand Palette (Rose / Navy / Charcoal / Silver / Off-white)
   Symbol: Tri-spiral (Core + End Dots) v6 final
   ====================================================================== */

:root {
  /* Brand Colors */
  --rose: #C6807A;
  --navy: #1D3968;
  --charcoal: #141414;
  --silver: #B5BBC2;
  --offwhite: #F2F1EF;
  --white: #FFFFFF;
  --paper: #F8F7F4;

  /* Text tones */
  --text-strong: #141414;
  --text-mid: #555555;
  --text-soft: #999999;
  --text-on-dark: rgba(255, 255, 255, 0.92);
  --text-on-dark-mid: rgba(255, 255, 255, 0.62);
  --text-on-dark-soft: rgba(255, 255, 255, 0.42);

  /* Borders */
  --border-line: #B5BBC2;
  --border-soft: #E4E1DA;

  /* Typography */
  --font-en: 'Cormorant Garamond', 'EB Garamond', serif;
  --font-jp: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;

  /* Rhythm */
  --section-pad-y: clamp(6rem, 10vw, 10rem);
  --section-pad-x: clamp(1.5rem, 5vw, 4rem);
  --content-max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--offwhite);
  color: var(--text-strong);
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: 15px;
  line-height: 2;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(242, 241, 239, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(181, 187, 194, 0.35);
}
.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px clamp(1.5rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--charcoal);
}
.nav-brand img { width: 32px; height: 32px; }
.nav-brand .wordmark {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: 0.08em;
}
.nav-brand .wordmark .dot { color: var(--rose); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}
.nav-links a {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--charcoal);
  text-decoration: none;
  transition: color 0.3s ease;
}
.nav-links a:hover { color: var(--rose); }
.nav-links a.active { color: var(--rose); }

.nav-cta {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 10px 22px;
  border: 1px solid var(--charcoal);
  color: var(--charcoal);
  text-decoration: none;
  transition: all 0.3s ease;
}
.nav-cta:hover {
  background: var(--charcoal);
  color: var(--offwhite);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--charcoal);
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--offwhite);
    border-bottom: 1px solid var(--border-line);
    padding: 1.5rem 2rem;
    gap: 1.25rem;
  }
}

/* ---------- Section scaffolding ---------- */
.section {
  padding: var(--section-pad-y) var(--section-pad-x);
}
.section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}
.section.dark {
  background: var(--charcoal);
  color: var(--text-on-dark);
}
.section.navy {
  background: var(--navy);
  color: var(--text-on-dark);
}
.section.paper {
  background: var(--paper);
}
.section.white {
  background: var(--white);
}

.eyebrow {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 20px;
}
.section.dark .eyebrow,
.section.navy .eyebrow {
  color: var(--text-on-dark-mid);
}

h1, h2, h3, h4 {
  font-family: var(--font-en);
  font-weight: 300;
  color: inherit;
  margin: 0;
  letter-spacing: -0.015em;
  line-height: 1.12;
}
h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); letter-spacing: -0.005em; }

h1 em, h2 em, h3 em {
  color: var(--navy);
  font-style: italic;
}
.section.dark h1 em, .section.dark h2 em, .section.dark h3 em,
.section.navy h1 em, .section.navy h2 em, .section.navy h3 em {
  color: var(--rose);
}

.jp-heading {
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  letter-spacing: 0.02em;
  line-height: 1.6;
  margin: 0 0 28px;
  color: inherit;
}

.lead {
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: 0.05em;
  color: var(--text-mid);
  max-width: 720px;
  margin: 0 0 56px;
}
.section.dark .lead,
.section.navy .lead {
  color: var(--text-on-dark-mid);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  padding: 16px 36px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}
.btn-primary {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.btn-primary:hover {
  background: var(--charcoal);
  border-color: var(--charcoal);
}
.btn-outline {
  background: transparent;
  color: var(--charcoal);
  border-color: var(--charcoal);
}
.btn-outline:hover {
  background: var(--charcoal);
  color: var(--offwhite);
}
.section.dark .btn-outline,
.section.navy .btn-outline {
  color: var(--white);
  border-color: var(--white);
}
.section.dark .btn-outline:hover,
.section.navy .btn-outline:hover {
  background: var(--white);
  color: var(--charcoal);
}

/* ---------- Hero (index) ---------- */
.hero {
  min-height: 100vh;
  background: var(--offwhite);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px var(--section-pad-x) 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-symbol {
  width: 220px;
  height: 220px;
  opacity: 0;
  animation: symbol-in 1.4s 0.2s ease forwards;
  margin-bottom: 48px;
}
.hero-divider {
  width: 1px;
  height: 56px;
  background: var(--silver);
  opacity: 0;
  animation: divider-in 1s 1.4s ease forwards;
  margin-bottom: 36px;
}
.hero-jp {
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  letter-spacing: 0.04em;
  line-height: 1.55;
  color: var(--charcoal);
  margin: 0 0 28px;
  opacity: 0;
  animation: rise-in 1.2s 1.8s ease forwards;
}
.hero-jp .accent { color: var(--rose); }

.hero-en {
  font-family: var(--font-en);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  letter-spacing: 0.18em;
  color: var(--text-mid);
  margin: 0 0 16px;
  opacity: 0;
  animation: rise-in 1.2s 2.4s ease forwards;
}
.hero-tagline {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--charcoal);
  margin: 0 0 56px;
  opacity: 0;
  animation: rise-in 1.2s 2.9s ease forwards;
}
.hero-cta {
  opacity: 0;
  animation: rise-in 1.2s 3.4s ease forwards;
}

@keyframes symbol-in {
  from { opacity: 0; transform: scale(0.92) rotate(-6deg); }
  to   { opacity: 1; transform: scale(1) rotate(0); }
}
@keyframes divider-in {
  from { opacity: 0; transform: scaleY(0); }
  to   { opacity: 1; transform: scaleY(1); }
}
@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Sub-page hero */
.page-hero {
  padding: 180px var(--section-pad-x) 88px;
  background: var(--offwhite);
  border-bottom: 1px solid var(--border-soft);
}
.page-hero-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* ---------- Grids ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--border-line);
  border-left: 1px solid var(--border-line);
}
.grid-3 > .cell {
  background: var(--white);
  border-right: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  padding: clamp(2rem, 3.5vw, 3rem);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.section.dark .grid-3 { border-color: rgba(255,255,255,0.08); }
.section.dark .grid-3 > .cell {
  background: rgba(255,255,255,0.02);
  border-color: rgba(255,255,255,0.08);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-left: 1px solid rgba(255,255,255,0.08);
}
.grid-5 > .cell {
  background: rgba(255,255,255,0.02);
  border-right: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: clamp(1.5rem, 2.5vw, 2.2rem);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-5 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid-5 { grid-template-columns: 1fr; }
}

/* ---------- Cells & cards ---------- */
.cell .num {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 22px;
  letter-spacing: 0.12em;
  color: var(--rose);
  margin-bottom: 22px;
}
.section.dark .cell .num { color: var(--rose); }

.cell h3 {
  font-family: var(--font-jp);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  margin: 0 0 18px;
  color: inherit;
}
.cell p {
  margin: 0;
  font-size: 13.5px;
  line-height: 2.1;
  letter-spacing: 0.04em;
  color: var(--text-mid);
}
.section.dark .cell p { color: var(--text-on-dark-mid); }

.cell .en-label {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-soft);
  margin-bottom: 8px;
}

/* Cards with colored border-top (variant) */
.cell.accent-rose { border-top: 3px solid var(--rose); }
.cell.accent-navy { border-top: 3px solid var(--navy); }
.cell.accent-silver { border-top: 3px solid var(--silver); }

/* ---------- Process / Timeline ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.process .step {
  padding: clamp(1.8rem, 3vw, 2.4rem) clamp(1.2rem, 2vw, 1.8rem);
  border-left: 1px solid var(--border-line);
  position: relative;
}
.process .step:first-child { border-left: 0; }
.process .step .phase {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--rose);
  margin-bottom: 10px;
}
.process .step .duration {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 18px;
}
.process .step h4 {
  font-family: var(--font-jp);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.6;
  margin: 0 0 14px;
  color: var(--charcoal);
}
.process .step p {
  margin: 0;
  font-size: 13px;
  line-height: 2;
  color: var(--text-mid);
}
@media (max-width: 900px) {
  .process { grid-template-columns: 1fr; }
  .process .step { border-left: 0; border-top: 1px solid var(--border-line); }
  .process .step:first-child { border-top: 0; }
}

/* ---------- Pull-quote / Manifesto block ---------- */
.quote {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--charcoal);
}
.quote .small {
  display: block;
  margin-top: 30px;
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--text-soft);
  text-transform: uppercase;
}
.section.dark .quote,
.section.navy .quote { color: var(--text-on-dark); }
.section.dark .quote .small,
.section.navy .quote .small { color: var(--text-on-dark-soft); }

/* ---------- CTA block (navy, inspired by LP v6.2) ---------- */
.cta-block {
  background: var(--navy);
  color: var(--text-on-dark);
  padding: clamp(5rem, 9vw, 8rem) var(--section-pad-x);
  text-align: center;
}
.cta-block .eyebrow {
  color: rgba(255,255,255,0.55);
}
.cta-block h2 {
  font-family: var(--font-en);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  color: var(--white);
  margin: 0 0 26px;
  letter-spacing: -0.01em;
}
.cta-block p {
  max-width: 620px;
  margin: 0 auto 48px;
  font-size: 14px;
  line-height: 2.1;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.72);
}
.cta-block .btn-outline {
  color: var(--white);
  border-color: rgba(255,255,255,0.7);
  padding: 18px 46px;
}
.cta-block .btn-outline:hover {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}

/* ---------- Info tables (company) ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0 0;
}
.info-table tr { border-bottom: 1px solid var(--border-soft); }
.info-table tr:first-child { border-top: 1px solid var(--border-soft); }
.info-table th {
  text-align: left;
  padding: 24px 20px 24px 0;
  width: 200px;
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-soft);
  vertical-align: top;
}
.info-table td {
  padding: 24px 0;
  font-size: 14px;
  line-height: 2;
  color: var(--text-strong);
}
@media (max-width: 700px) {
  .info-table th, .info-table td { display: block; width: 100%; padding: 8px 0; }
  .info-table th { padding-top: 20px; }
  .info-table td { padding-bottom: 20px; }
}

/* ---------- Form ---------- */
.form {
  max-width: 720px;
  margin: 0 auto;
}
.form .field {
  margin-bottom: 32px;
}
.form label {
  display: block;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 10px;
}
.form label .req { color: var(--rose); margin-left: 6px; }
.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--border-line);
  background: transparent;
  font-family: var(--font-jp);
  font-weight: 300;
  font-size: 15px;
  color: var(--charcoal);
  outline: none;
  transition: border-color 0.3s ease;
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  border-bottom-color: var(--navy);
}
.form textarea { min-height: 160px; resize: vertical; font-family: var(--font-jp); }
.form .submit-row { text-align: center; margin-top: 48px; }
.form-note {
  font-size: 12px;
  line-height: 2;
  color: var(--text-soft);
  text-align: center;
  margin-top: 24px;
  letter-spacing: 0.04em;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--charcoal);
  color: var(--text-on-dark-mid);
  padding: clamp(3.5rem, 6vw, 5rem) var(--section-pad-x) 2.5rem;
}
.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.footer-brand img { width: 44px; height: 44px; }
.footer-brand .wordmark {
  font-family: var(--font-en);
  font-size: 22px;
  letter-spacing: 0.08em;
  color: var(--white);
}
.footer-brand .wordmark .dot { color: var(--rose); }

.footer .tagline {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--text-on-dark-soft);
  margin: 0;
}
.footer-col h5 {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-on-dark-soft);
  margin: 0 0 18px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-on-dark-mid);
  text-decoration: none;
  padding: 6px 0;
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
}
.footer-col a:hover { color: var(--rose); }

.footer-bottom {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-on-dark-soft);
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; }
}

/* ---------- Misc utility ---------- */
.center { text-align: center; }
.mt-sm { margin-top: 1.5rem; }
.mt-md { margin-top: 3rem; }
.mt-lg { margin-top: 5rem; }
.divider {
  width: 100%;
  height: 1px;
  background: var(--border-line);
  margin: 0;
}