/* =========================================
   INKYOUUP Inc, — Corporate Site
   Light / Editorial / Ink-driven
   ========================================= */

:root {
  --bg: #fafaf7;
  --bg-elev: #ffffff;
  --bg-deep: #05061a;
  --fg: #0a0a14;
  --fg-muted: #6a6c7a;
  --line: #e5e6ef;
  --line-strong: #0a0a14;
  --ink: #0a0a14;
  --accent: #1e22e8;
  --accent-deep: #0f1299;
  --accent-cyan: #00e6ff;
  --accent-magenta: #ff2976;
  --max: 1200px;
  --pad: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Gotham", "Gotham SSm", "Montserrat", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
em { font-style: italic; font-weight: 700; color: var(--accent-deep); }

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

.sp-only { display: none; }
.pc-only { display: inline; }
@media (max-width: 640px) {
  .sp-only { display: inline; }
  .pc-only { display: none; }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(250, 250, 245, 0.86);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  height: 40px;
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
  letter-spacing: 0.02em;
}
.brand-dot { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
}
.nav a {
  display: inline-flex;
  align-items: center;
  height: 40px;
  line-height: 1;
  color: var(--fg-muted);
  transition: color .2s ease;
}
.nav a:hover,
.nav a.active { color: var(--fg); }
.nav-cta {
  color: var(--bg) !important;
  background: var(--fg);
  padding: 0 20px;
  height: 40px;
  border-radius: 999px;
  transition: all .2s ease;
}
.nav-cta:hover { background: var(--accent); }

@media (max-width: 720px) {
  .nav { gap: 14px; font-size: 13px; }
  .nav a:not(.nav-cta) { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(96px, 14vw, 180px) 0 clamp(80px, 12vw, 140px);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  right: -10%;
  top: -5%;
  width: 60%;
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(30, 34, 232, 0.10) 0%, transparent 65%);
  pointer-events: none;
}
.eyebrow {
  position: relative;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 32px;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 2px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 16px;
}
.hero-title {
  position: relative;
  font-family: "Gotham", "Gotham SSm", "Montserrat", sans-serif;
  font-weight: 900;
  font-style: italic;
  font-size: clamp(56px, 11vw, 168px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 40px;
  color: var(--fg);
}
.hero-title em {
  font-style: italic;
  color: var(--accent);
  font-weight: 900;
}
.hero-title .bang {
  color: var(--accent);
}
.hero-sub {
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 500;
  line-height: 1.7;
  color: var(--fg);
  margin: 0 0 52px;
  max-width: 680px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 34px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  border-radius: 999px;
  transition: all .2s ease;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--fg);
  background: transparent;
}
.btn-ghost:hover { background: var(--fg); color: var(--bg); }
.arrow { transition: transform .2s ease; }
.btn-primary:hover .arrow,
.btn-ghost:hover .arrow { transform: translateX(4px); }

/* ---------- Section (common) ---------- */
.section {
  padding: clamp(80px, 12vw, 140px) 0;
  border-bottom: 1px solid var(--line);
}
.section-head {
  display: flex;
  align-items: baseline;
  gap: 28px;
  margin-bottom: 56px;
}
.section-num {
  font-family: "Inter", sans-serif;
  font-weight: 900;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent);
  opacity: 0.55;
}
.section-title {
  font-family: "Inter", sans-serif;
  font-weight: 900;
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- Service ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
}
.service-card {
  background: var(--bg-elev);
  padding: clamp(28px, 4vw, 48px);
  transition: background .25s ease;
}
.service-card:hover { background: #f3f4fa; }
.card-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 24px;
}
.card-title {
  font-family: "Noto Sans JP", "Inter", sans-serif;
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.005em;
  margin: 0 0 24px;
}
.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.card-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--fg-muted);
  margin-bottom: 6px;
}
.card-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.card-body {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--fg-muted);
  margin: 0 0 24px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  color: var(--fg);
  border-bottom: 1px solid var(--fg);
  padding-bottom: 3px;
  transition: color .2s ease, border-color .2s ease;
}
.card-link:hover { color: var(--accent); border-color: var(--accent); }
.service-card-cta { display: flex; flex-direction: column; justify-content: space-between; }
@media (max-width: 720px) {
  .service-grid { grid-template-columns: 1fr; }
}

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.feature-card {
  padding: clamp(28px, 4vw, 48px);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
}
.feature-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}
.feature-title {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin: 0 0 20px;
}
.feature-body {
  font-size: 15px;
  line-height: 1.9;
  color: var(--fg-muted);
  margin: 0;
}
@media (max-width: 720px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* ---------- About ---------- */
.about-body { max-width: 880px; }
.about-text {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2;
  color: var(--fg);
  margin: 0 0 24px;
}
.about-text strong {
  font-weight: 900;
}

/* ---------- Mission ---------- */
.mission {
  background: var(--bg-deep);
  color: var(--bg);
  border-bottom: none;
}
.mission-box {
  text-align: center;
  padding: 32px 0 64px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 56px;
}
.mission-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.32em;
  color: var(--accent);
  margin: 0 0 24px;
}
.mission-main {
  font-family: "Gotham", "Gotham SSm", "Montserrat", sans-serif;
  font-weight: 900;
  font-size: clamp(56px, 10vw, 140px);
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--bg);
  margin: 0 0 24px;
}
.mission-sub {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 500;
  font-size: clamp(16px, 2vw, 22px);
  color: rgba(255,255,255,0.75);
  margin: 0;
}
.mission-narrative {
  max-width: 720px;
  margin: 0 auto;
}
.mission-narrative p {
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2;
  color: rgba(255,255,255,0.82);
  margin: 0 0 20px;
}
.mission-narrative em {
  color: var(--accent);
}
.mission-narrative strong {
  color: var(--bg);
  font-weight: 700;
}
.mission-quotes {
  list-style: none;
  padding: 20px 0 20px 24px;
  margin: 0 0 20px;
  border-left: 2px solid var(--accent);
}
.mission-quotes li {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  line-height: 1.9;
  font-style: italic;
}

/* ---------- Message ---------- */
.message-body { max-width: 880px; }
.message-lead {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.4;
  letter-spacing: -0.015em;
  margin: 0 0 40px;
}
.message-lead em {
  font-style: italic;
  color: var(--accent);
  font-weight: 900;
}
.message-text {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2;
  color: var(--fg);
  margin: 0 0 22px;
}

/* ---------- Company ---------- */
.company-list {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  max-width: 880px;
}
.company-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.company-row dt {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding-top: 2px;
}
.company-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg);
}
@media (max-width: 720px) {
  .company-row { grid-template-columns: 1fr; gap: 6px; padding: 16px 0; }
}

/* ---------- Contact ---------- */
.contact-body { max-width: 720px; }
.contact-lead {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 500;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.8;
  color: var(--fg);
  margin: 0 0 56px;
}
.contact-lead strong { color: var(--accent); font-weight: 900; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.form-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.required { color: var(--accent); margin-left: 4px; }

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: transparent;
  color: var(--fg);
  border: none;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 14px 0;
  font-family: inherit;
  font-size: 16px;
  line-height: 1.6;
  transition: border-color .2s ease;
  -webkit-appearance: none;
  appearance: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--fg-muted);
  opacity: 0.5;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact-form textarea {
  resize: vertical;
  min-height: 140px;
}
.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--fg);
}
.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}
.form-submit {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
  padding: 18px 36px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: var(--bg);
  background: var(--fg);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease;
}
.form-submit:hover { transform: translateY(-2px); background: var(--accent); }

/* ---------- Footer ---------- */
.site-footer {
  padding: 48px 0;
  background: var(--bg);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand {
  font-weight: 900;
  font-size: 16px;
  margin: 0;
}
.footer-copy {
  font-size: 13px;
  color: var(--fg-muted);
  margin: 0;
}

/* =========================================
   Case page specific
   ========================================= */

.case-hero {
  padding: clamp(80px, 12vw, 140px) 0 clamp(60px, 8vw, 100px);
  border-bottom: 1px solid var(--line);
}
.case-hero-title {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 700;
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 900px;
}

.cases .container {
  display: flex;
  flex-direction: column;
  gap: 80px;
}
.case-item {
  padding: clamp(40px, 5vw, 64px);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.case-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 48px;
  background: var(--accent);
}
.case-header {
  margin-bottom: 44px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.case-index {
  font-family: "Inter", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}
.case-title {
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 900;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0;
}
.case-blocks {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.case-block-label {
  font-family: "Inter", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 10px;
}
.case-block-body {
  font-size: 15px;
  line-height: 1.9;
  color: var(--fg);
  margin: 0;
}
.case-bullets {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
}
.case-bullets li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--fg);
  margin-bottom: 6px;
}
.case-bullets li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.case-block-outcome {
  padding: 28px;
  background: #f2f3fd;
  border-left: 3px solid var(--accent);
  border-radius: 2px;
}
.case-block-outcome .case-block-label { color: var(--accent); }

.case-cta {
  padding: clamp(80px, 10vw, 120px) 0;
  text-align: center;
  background: var(--bg-deep);
  color: var(--bg);
}
.case-cta-lead {
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  margin: 0 0 32px;
}
.case-cta .btn-primary {
  background: var(--bg);
  color: var(--fg);
}
.case-cta .btn-primary:hover { background: var(--accent); color: var(--bg); }

.intro-cta-row {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* =========================================
   Introduction page
   ========================================= */

.intro-hero {
  padding: clamp(80px, 12vw, 140px) 0 clamp(40px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
}
.intro-hero-title {
  font-family: "Gotham", "Gotham SSm", "Montserrat", "Noto Sans JP", sans-serif;
  font-weight: 900;
  font-size: clamp(36px, 6vw, 72px);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 20px;
}
.intro-hero-sub {
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--fg-muted);
  margin: 0;
  max-width: 680px;
}

.intro-slide .container {
  max-width: 1100px;
}
.slide-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(10, 10, 20, 0.08);
}
.slide-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.slide-note {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
}
.slide-note a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}