/* ============================================
   Calculator LP - Style
   Theme: Professional, Accuracy, Minimal
   Width: 1200px / Content: 960px / Margin: 120px
   Breakpoint: 768px
   ============================================ */

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #1a1a2e;
  --color-primary-light: #16213e;
  --color-accent: #f39800;
  --color-accent-hover: #d18300;
  --color-bg: #ffffff;
  --color-bg-gray: #f5f6f8;
  --color-text: #1a1a2e;
  --color-text-sub: #5a5d6e;
  --color-text-light: #8b8fa3;
  --color-border: #e2e4ea;
  --color-white: #ffffff;
  --color-cta-bg: #0f1923;
  --font-family: "Inter", "Noto Sans JP", sans-serif;
  --max-width: 1200px;
  --content-width: 960px;
  --side-margin: 120px;
  --header-height: 72px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ---------- Utility ---------- */
.sp-only {
  display: none;
}

/* ---------- Fade-in Animation ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-family);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(243, 152, 0, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn--lg {
  font-size: 17px;
  padding: 18px 40px;
  border-radius: 10px;
}

.btn__icon {
  flex-shrink: 0;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-margin);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.header__logo-icon {
  border-radius: 8px;
  flex-shrink: 0;
}

.header__nav-list {
  display: flex;
  gap: 32px;
}

.header__nav-list a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-sub);
  transition: color var(--transition);
}

.header__nav-list a:hover {
  color: var(--color-accent);
}

.header__cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 20px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius);
  transition: background var(--transition);
}

.header__cta-btn--badge {
  background: transparent;
  padding: 4px 0;
  transition: opacity var(--transition);
}

.header__cta-btn--badge:hover {
  background: transparent;
  opacity: 0.8;
}

.header__cta-btn--badge img {
  height: 36px;
  width: auto;
}

.header__cta-btn:hover {
  background: var(--color-accent-hover);
}

.header__cta-btn.header__cta-btn--badge:hover {
  background: transparent;
  opacity: 0.8;
}

.header__cta-icon {
  flex-shrink: 0;
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 80px;
  background: linear-gradient(170deg, #f8f9fc 0%, var(--color-bg) 100%);
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-margin);
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero__content {
  flex: 1;
}

.hero__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(243, 152, 0, 0.1);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}

.hero__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: 17px;
  color: var(--color-text-sub);
  line-height: 1.9;
  margin-bottom: 36px;
}

.hero__cta-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.hero__badge-link {
  display: inline-block;
  transition: opacity var(--transition);
}

.hero__badge-link:hover {
  opacity: 0.8;
}

.hero__badge-img {
  height: 56px;
  width: auto;
}

.hero__free-note {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  padding-left: 4px;
}

.hero__free-note::before {
  content: "\2713";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-accent);
  border-radius: 50%;
}

.hero__image {
  flex-shrink: 0;
  width: 420px;
}

.hero__image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ---------- Section Common ---------- */
.section {
  padding: 100px 0;
}

.section--gray {
  background: var(--color-bg-gray);
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-margin);
}

.section__title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  color: var(--color-primary);
  margin-bottom: 56px;
  letter-spacing: -0.01em;
  line-height: 1.5;
}

/* ---------- Problem Section ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.problem-card {
  background: var(--color-white);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
  border: 1px solid var(--color-border);
}

.problem-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff0f0;
  color: #d14040;
  margin-bottom: 20px;
}

.problem-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.6;
}

.problem-card__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ---------- Solution Section (3 Steps) ---------- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.solution-item {
  text-align: center;
}

.solution-item__step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.solution-item__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.solution-item__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.9;
}

/* ---------- Features Section ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-white);
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(243, 152, 0, 0.1);
  color: var(--color-accent);
  margin-bottom: 16px;
}

.feature-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-card__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ---------- Scenes Section ---------- */
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.scene-card {
  background: var(--color-bg-gray);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.scene-card:hover {
  box-shadow: var(--shadow-md);
}

.scene-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.scene-card__body {
  padding: 24px;
}

.scene-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.scene-card__text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ---------- Placeholder ---------- */
.placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #dde1e8 0%, #c8cdd6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 13px;
  text-align: center;
  padding: 20px;
}

.placeholder::after {
  content: attr(data-size) " / " attr(data-desc);
}

/* ---------- Pricing Section ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 720px;
  margin: 0 auto 48px;
}

.pricing-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card--pro {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent), var(--shadow-md);
}

.pricing-card__badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  background: var(--color-bg-gray);
  color: var(--color-text-sub);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.pricing-card__badge--pro {
  background: var(--color-accent);
  color: var(--color-white);
}

.pricing-card__title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.pricing-card__price {
  margin-bottom: 24px;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-card__amount {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-primary);
}

.pricing-card__amount-sub {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-sub);
}

.pricing-card__list {
  text-align: left;
  margin-bottom: 28px;
  flex: 1;
}

.pricing-card__list li {
  font-size: 14px;
  color: var(--color-text-sub);
  padding: 6px 0 6px 24px;
  position: relative;
  line-height: 1.6;
}

.pricing-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 14px;
  height: 14px;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='%23f39800' stroke-width='3' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") no-repeat center / contain;
}

.pricing-card__badge-link {
  display: inline-block;
  transition: opacity var(--transition);
}

.pricing-card__badge-link:hover {
  opacity: 0.8;
}

.pricing-card__badge-img {
  height: 48px;
  width: auto;
}

/* ---------- Env Info ---------- */
.env-info {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  max-width: 720px;
  margin: 0 auto;
}

.env-info__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  text-align: center;
}

.env-info__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.env-info__item {
  text-align: center;
}

.env-info__label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-light);
  margin-bottom: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.env-info__value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

/* ---------- FAQ Section ---------- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__question::after {
  content: "+";
  font-size: 22px;
  font-weight: 300;
  color: var(--color-text-light);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] .faq-item__question::after {
  transform: rotate(45deg);
}

.faq-item__question:hover {
  color: var(--color-accent);
}

.faq-item__answer {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.9;
  padding-bottom: 24px;
}

/* ---------- CTA Section ---------- */
.section--cta {
  background: var(--color-cta-bg);
  padding: 100px 0;
}

.cta-block {
  text-align: center;
}

.cta-block__title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.cta-block__text {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 36px;
}

.cta-block__badge-link {
  display: inline-block;
  transition: opacity var(--transition);
}

.cta-block__badge-link:hover {
  opacity: 0.8;
}

.cta-block__badge-img {
  height: 60px;
  width: auto;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-cta-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 48px 0 32px;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--side-margin);
}

.footer__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 40px;
}

.footer__logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
}

.footer__tagline {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 6px;
}

.footer__nav {
  display: flex;
  gap: 28px;
}

.footer__nav a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}

.footer__nav a:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__copyright {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
}

.footer__contact {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--transition);
}

.footer__contact:hover {
  color: var(--color-white);
}

/* ============================================
   Responsive - max-width: 768px
   ============================================ */
@media (max-width: 768px) {
  :root {
    --side-margin: 20px;
    --header-height: 60px;
  }

  .sp-only {
    display: inline;
  }

  /* Header */
  .header__nav,
  .header__cta-btn {
    display: none;
  }

  .header__menu-btn {
    display: flex;
  }

  .header__nav.is-open {
    display: block;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 20px 24px;
    box-shadow: var(--shadow-md);
  }

  .header__nav.is-open .header__nav-list {
    flex-direction: column;
    gap: 0;
  }

  .header__nav.is-open .header__nav-list a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--color-border);
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--header-height) + 48px);
    padding-bottom: 48px;
  }

  .hero__inner {
    flex-direction: column;
    gap: 40px;
    text-align: center;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__subtitle {
    font-size: 15px;
  }

  .hero__cta-group {
    align-items: center;
  }

  .hero__badge-img {
    height: 48px;
  }

  .hero__image {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }

  /* Section */
  .section {
    padding: 64px 0;
  }

  .section__title {
    font-size: 24px;
    margin-bottom: 36px;
  }

  /* Problem */
  .problem-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .problem-card {
    padding: 28px 20px;
  }

  /* Solution */
  .solution-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Scenes */
  .scenes-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Pricing */
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .pricing-card {
    padding: 32px 24px;
  }

  /* Env Info */
  .env-info {
    padding: 28px 20px;
  }

  .env-info__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* FAQ */
  .faq-item__question {
    font-size: 15px;
    padding: 20px 0;
  }

  /* CTA */
  .section--cta {
    padding: 64px 0;
  }

  .cta-block__title {
    font-size: 26px;
  }

  .btn--lg {
    font-size: 15px;
    padding: 16px 28px;
    width: 100%;
  }

  /* Footer */
  .footer__top {
    flex-direction: column;
    gap: 24px;
  }

  .footer__nav {
    flex-wrap: wrap;
    gap: 16px;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}