/* ===========================================================
   Jexen — AI Consulting landing page
   Shares the corporate design tokens (see style.css)
   =========================================================== */

:root {
  --bg:             #f7fbff;
  --bg-secondary:   #eef5ff;
  --surface:        rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);

  --text:           #06142d;
  --text-secondary: #5f6b7a;
  --text-tertiary:  #8a94a3;

  --primary:        #245bff;
  --primary-hover:  #1a48d6;
  --primary-light:  #73a8ff;
  --primary-soft:   #d9e6ff;

  --line:           rgba(20, 40, 80, 0.08);
  --line-strong:    rgba(20, 40, 80, 0.16);
  --glow:           rgba(120, 170, 255, 0.25);

  --sans: "Inter", "Noto Sans JP", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --max:        1200px;
  --pad:        clamp(1rem, 4vw, 3rem);
  --section-y:  clamp(80px, 11vw, 140px);
  --radius:     24px;
  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 35%, var(--bg-secondary) 100%);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
strong { font-weight: 600; color: var(--text); }

.lp-container { width: min(var(--max), 100% - var(--pad) * 2); margin-inline: auto; }
.lp-container--narrow { width: min(820px, 100% - var(--pad) * 2); }

.pc-only { display: inline; }
.sp-only { display: none; }
@media (max-width: 720px) {
  .pc-only { display: none; }
  .sp-only { display: inline; }
}

/* ---------- Buttons ---------- */
.lp-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  border-radius: 999px;
  padding: 0.9rem 1.5rem;
  font-weight: 600; font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.2s;
  white-space: nowrap;
}
.lp-btn--primary { background: var(--primary); color: #fff; }
.lp-btn--primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 12px 40px rgba(36, 91, 255, 0.22); }
.lp-btn--primary:disabled { opacity: 0.6; cursor: wait; transform: none; }
.lp-btn--ghost { background: var(--surface-strong); color: var(--text); border-color: var(--line-strong); }
.lp-btn--ghost:hover { border-color: var(--primary-light); transform: translateY(-2px); }
.lp-btn--sm { padding: 0.6rem 1.1rem; font-size: 0.85rem; }
.lp-btn--lg { padding: 1.1rem 1.8rem; font-size: 1rem; }
.lp-btn--block { width: 100%; }

/* ---------- Nav ---------- */
.lp-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  padding: 1rem var(--pad);
  transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
}
.lp-nav.is-scrolled {
  background: rgba(247, 251, 255, 0.82);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line);
  padding-block: 0.7rem;
}
.lp-nav__brand { display: flex; align-items: center; gap: 0.55rem; text-decoration: none; }
.lp-nav__logo { font-weight: 700; font-size: 1.35rem; letter-spacing: -0.03em; }
.lp-nav__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 12px var(--primary-light); }
.lp-nav__sub { font-family: var(--mono); font-size: 0.72rem; color: var(--text-tertiary); letter-spacing: 0.04em; }
.lp-nav__menu { display: flex; gap: 1.8rem; margin-left: auto; }
.lp-nav__menu a { text-decoration: none; font-size: 0.88rem; color: var(--text-secondary); transition: color 0.2s; }
.lp-nav__menu a:hover { color: var(--text); }
@media (max-width: 900px) {
  .lp-nav__menu { display: none; }
  .lp-nav__sub { display: none; }
}

/* ---------- Common section ---------- */
.section { padding-block: var(--section-y); }
.section--compact { padding-block: clamp(48px, 6vw, 80px); }
.section--tinted {
  background: linear-gradient(180deg, rgba(238, 245, 255, 0) 0%, rgba(230, 239, 255, 0.7) 50%, rgba(238, 245, 255, 0) 100%);
}
.section__head { max-width: 760px; margin-bottom: clamp(40px, 5vw, 64px); }
.section__label {
  display: inline-block;
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 1rem;
}
.section__title {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 700; letter-spacing: -0.02em;
}
.section__lede { margin-top: 1.25rem; color: var(--text-secondary); font-size: clamp(0.95rem, 1.3vw, 1.05rem); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.4rem 0.95rem;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  font-size: 0.82rem; font-weight: 500; color: var(--text-secondary);
}
.eyebrow__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 4px var(--primary-soft); }


/* ---------- Hero ---------- */
.hero { padding: clamp(120px, 16vw, 180px) 0 clamp(64px, 9vw, 120px); position: relative; overflow-x: clip; }
.hero__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero__title {
  margin-top: 1.5rem;
  font-size: clamp(2.1rem, 4.4vw, 3.6rem);
  line-height: 1.12; letter-spacing: -0.035em; font-weight: 700;
}
.hero__accent {
  white-space: nowrap;
  background: linear-gradient(90deg, var(--primary) 0%, #5b8cff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lede { margin-top: 1.75rem; color: var(--text-secondary); font-size: clamp(1rem, 1.4vw, 1.12rem); line-height: 1.95; max-width: 36em; }
.hero__ctas { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2.25rem; }
.hero__points { display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; margin-top: 2rem; }
.hero__points li { display: flex; align-items: center; gap: 0.4rem; font-size: 0.88rem; color: var(--text-secondary); }
.hero__points i { color: var(--primary); font-size: 1.05rem; }

.hero__visual { position: relative; }
.hero__glow {
  position: absolute; inset: -10% -10% -10% -10%; z-index: -1;
  background: radial-gradient(closest-side, var(--glow), transparent 70%);
  filter: blur(20px);
}
.flow-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 28px;
  box-shadow: 0 24px 64px rgba(20, 40, 80, 0.1);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  padding: clamp(1.25rem, 2.5vw, 2rem);
}
.flow-card__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; }
.flow-card__title { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--text-tertiary); }
.flow-card__badge { font-size: 0.72rem; font-weight: 600; padding: 0.2rem 0.6rem; border-radius: 999px; background: var(--primary-soft); color: var(--primary); }
.flow { position: relative; display: grid; gap: 0.7rem; }
.flow::before {
  content: ""; position: absolute; left: 21px; top: 22px; bottom: 22px; width: 1px;
  background: linear-gradient(180deg, var(--line-strong), var(--primary-light));
}
.flow__step {
  position: relative;
  display: flex; align-items: center; gap: 0.9rem;
  padding: 0.75rem 1rem 0.75rem 0;
  border-radius: 16px;
}
.flow__icon {
  flex: none; width: 44px; height: 44px; border-radius: 14px;
  display: grid; place-items: center;
  background: #fff; border: 1px solid var(--line-strong);
  color: var(--primary); font-size: 1.25rem;
  position: relative; z-index: 1;
}
.flow__label { display: block; font-family: var(--mono); font-size: 0.72rem; color: var(--text-tertiary); letter-spacing: 0.04em; }
.flow__text { display: block; font-size: 0.95rem; font-weight: 500; }
.flow__step--active { background: linear-gradient(90deg, rgba(36, 91, 255, 0.08), rgba(36, 91, 255, 0)); }
.flow__step--active .flow__icon { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 8px 24px rgba(36, 91, 255, 0.3); }
.flow-card__foot { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.chip { font-size: 0.72rem; padding: 0.25rem 0.65rem; border-radius: 999px; border: 1px solid var(--line-strong); color: var(--text-secondary); background: #fff; }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__ctas .lp-btn { flex: 1 1 100%; }
}

/* ---------- Problems ---------- */
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.problem {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1.5rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px;
}
.problem i { flex: none; font-size: 1.5rem; color: var(--text-tertiary); margin-top: 0.1rem; }
.problem p { color: var(--text-secondary); font-size: 0.97rem; }
.problem__answer {
  margin-top: clamp(40px, 5vw, 56px);
  text-align: center;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem); font-weight: 500; letter-spacing: -0.01em;
}
.problem__answer strong { color: var(--primary); }
@media (max-width: 900px) { .problem-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .problem-grid { grid-template-columns: 1fr; } }

/* ---------- Why ---------- */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.why {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(20, 40, 80, 0.06);
}
.why__num { font-family: var(--mono); font-size: 0.8rem; color: var(--primary); }
.why__title { margin: 0.6rem 0 0.8rem; font-size: 1.2rem; font-weight: 600; }
.why p { color: var(--text-secondary); font-size: 0.95rem; }
@media (max-width: 720px) { .why-grid { grid-template-columns: 1fr; } }

/* ---------- Services ---------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.service {
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.3s, transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.service:hover { border-color: var(--primary-soft); transform: translateY(-3px); box-shadow: 0 16px 40px rgba(20, 40, 80, 0.08); }
.service__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px; border-radius: 14px;
  background: var(--primary-soft); color: var(--primary); font-size: 1.4rem;
}
.service__title { margin: 1.25rem 0 0.7rem; font-size: 1.08rem; font-weight: 600; }
.service p { color: var(--text-secondary); font-size: 0.93rem; }
@media (max-width: 900px) { .service-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .service-grid { grid-template-columns: 1fr; } }

/* ---------- Use cases ---------- */
.usecase-table {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.usecase { display: grid; grid-template-columns: 260px 1fr; gap: 1.5rem; padding: 1.6rem clamp(1.25rem, 3vw, 2.25rem); }
.usecase + .usecase { border-top: 1px solid var(--line); }
.usecase__dept { display: flex; align-items: center; gap: 0.6rem; font-weight: 600; }
.usecase__dept i { color: var(--primary); font-size: 1.25rem; }
.usecase__list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.usecase__list li {
  font-size: 0.9rem; color: var(--text-secondary);
  padding: 0.35rem 0.85rem; border-radius: 999px; background: var(--bg); border: 1px solid var(--line);
}
@media (max-width: 720px) { .usecase { grid-template-columns: 1fr; gap: 0.9rem; } }

/* ---------- Process ---------- */
.process { display: grid; gap: 0; position: relative; }
.process__step {
  display: grid; grid-template-columns: 72px 1fr; gap: 1.25rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}
.process__step:last-child { border-bottom: 1px solid var(--line); }
.process__num { font-family: var(--mono); font-size: 1.6rem; font-weight: 500; color: var(--primary-light); line-height: 1.2; }
.process__step h3 { font-size: 1.12rem; font-weight: 600; }
.process__step p { margin-top: 0.4rem; color: var(--text-secondary); font-size: 0.95rem; }
.process__step:first-child h3::after {
  content: "無料"; margin-left: 0.6rem; vertical-align: 0.15em;
  font-size: 0.7rem; font-weight: 600; padding: 0.15rem 0.55rem; border-radius: 999px;
  background: var(--primary); color: #fff;
}
@media (max-width: 600px) { .process__step { grid-template-columns: 48px 1fr; gap: 0.75rem; } .process__num { font-size: 1.25rem; } }

/* ---------- Plans ---------- */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; align-items: stretch; }
.plan {
  display: flex; flex-direction: column;
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.plan--featured {
  border: 1.5px solid var(--primary);
  box-shadow: 0 24px 64px rgba(36, 91, 255, 0.14);
  position: relative;
}
.plan__tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-tertiary); }
.plan--featured .plan__tag { color: var(--primary); }
.plan__name { margin-top: 0.5rem; font-size: 1.3rem; font-weight: 700; }
.plan__desc { margin-top: 0.5rem; color: var(--text-secondary); font-size: 0.92rem; }
.plan__list { margin: 1.25rem 0 1.5rem; display: grid; gap: 0.55rem; flex: 1; }
.plan__list li { position: relative; padding-left: 1.5rem; font-size: 0.93rem; }
.plan__list li::before {
  content: ""; position: absolute; left: 0.2rem; top: 0.62em;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--primary-soft); box-shadow: inset 0 0 0 2px var(--primary-light);
}
.plan__term { padding-top: 1rem; border-top: 1px solid var(--line); font-size: 0.85rem; color: var(--text-secondary); }
@media (max-width: 900px) { .plan-grid { grid-template-columns: 1fr; } }

/* ---------- Tech ---------- */
.tech { text-align: center; }
.tech__list { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem 0.6rem; margin-top: 0.5rem; }
.tech__list li { font-size: 0.88rem; color: var(--text-secondary); padding: 0.4rem 0.9rem; border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(255, 255, 255, 0.6); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 0.75rem; }
.faq__item { background: var(--surface-strong); border: 1px solid var(--line); border-radius: 18px; }
.faq__item summary {
  list-style: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1.2rem 1.5rem; font-weight: 600; font-size: 1rem;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; flex: none; font-family: var(--mono); font-size: 1.2rem; color: var(--primary);
  transition: transform 0.3s var(--ease);
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__item p { padding: 0 1.5rem 1.4rem; color: var(--text-secondary); font-size: 0.95rem; }

/* ---------- Contact ---------- */
.section--contact { padding-bottom: calc(var(--section-y) + 40px); }
.contact__grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 5vw, 72px); align-items: start; }
.contact__title { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 700; letter-spacing: -0.02em; }
.contact__lede { margin-top: 1.25rem; color: var(--text-secondary); }
.contact__checks { margin-top: 1.75rem; display: grid; gap: 0.6rem; }
.contact__checks li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.95rem; }
.contact__checks i { color: var(--primary); font-size: 1.15rem; }
.contact__direct { margin-top: 2rem; display: grid; gap: 0.5rem; }
.contact__direct a { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--text-secondary); font-size: 0.92rem; }
.contact__direct a:hover { color: var(--primary); }

.contact__form {
  padding: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--surface-strong);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 28px;
  box-shadow: 0 24px 64px rgba(20, 40, 80, 0.08);
}
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.field { display: grid; gap: 0.4rem; }
.field--full { grid-column: 1 / -1; }
.field__label { font-size: 0.85rem; font-weight: 500; }
.field__req { margin-left: 0.3rem; font-size: 0.68rem; font-weight: 600; color: var(--primary); }
.field__input {
  width: 100%;
  font: inherit; font-size: 16px; color: var(--text);
  padding: 0.8rem 1rem;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field__input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(36, 91, 255, 0.12); }
.field__select {
  appearance: none; -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-tertiary) 50%), linear-gradient(135deg, var(--text-tertiary) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%;
  background-size: 5px 5px; background-repeat: no-repeat;
  padding-right: 2.5rem;
}
.field__textarea { resize: vertical; min-height: 130px; line-height: 1.7; }
.field--consent { display: flex; align-items: center; gap: 0.6rem; font-size: 0.88rem; color: var(--text-secondary); }
.field--consent input { width: 18px; height: 18px; accent-color: var(--primary); }
.field--consent a { color: var(--primary); }
.field--honey { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact__status { margin-top: 1rem; font-size: 0.9rem; min-height: 1.4em; }
.contact__status[data-kind="success"] { color: #0f8a5f; }
.contact__status[data-kind="error"] { color: #d0342c; }
@media (max-width: 900px) { .contact__grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .field-grid { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.lp-footer { border-top: 1px solid var(--line); padding: 3rem 0 6rem; background: rgba(255, 255, 255, 0.5); }
.lp-footer__inner { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.lp-footer__logo { font-weight: 700; font-size: 1.3rem; letter-spacing: -0.03em; text-decoration: none; }
.lp-footer__company { margin-top: 0.6rem; font-size: 0.82rem; color: var(--text-tertiary); line-height: 1.8; }
.lp-footer__nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; align-items: flex-start; }
.lp-footer__nav a { font-size: 0.85rem; color: var(--text-secondary); text-decoration: none; }
.lp-footer__nav a:hover { color: var(--primary); }
.lp-footer__copy { width: min(var(--max), 100% - var(--pad) * 2); margin: 2rem auto 0; font-size: 0.78rem; color: var(--text-tertiary); }

/* ---------- Sticky CTA (mobile) ---------- */
.sticky-cta {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 60;
  display: none; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 1rem; border-radius: 999px;
  background: var(--primary); color: #fff; font-weight: 600; text-decoration: none;
  box-shadow: 0 12px 32px rgba(36, 91, 255, 0.35);
  transform: translateY(140%); transition: transform 0.4s var(--ease);
}
.sticky-cta.is-visible { transform: none; }
@media (max-width: 720px) { .sticky-cta { display: flex; } }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}