:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-soft: #eef5ff;
  --text: #172033;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --accent: #22c55e;
  --purple: #8b5cf6;
  --shadow: 0 20px 60px rgba(30, 41, 59, 0.10);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.12), transparent 26%),
    radial-gradient(circle at 90% 0%, rgba(34, 197, 94, 0.10), transparent 28%),
    var(--bg);
  line-height: 1.7;
}

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 249, 252, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.28);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--primary);
}

.nav-button {
  padding: 10px 16px;
  color: var(--primary) !important;
  background: #eaf2ff;
  border-radius: 999px;
}

.hero {
  padding-top: 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: 64px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.hero-text,
.section-heading p,
.download-card p,
.privacy-section p {
  color: var(--muted);
  font-size: 17px;
}

.hero-text {
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.28);
}

.secondary-button {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.primary-button:hover {
  box-shadow: 0 18px 34px rgba(37, 99, 235, 0.34);
}

.note {
  margin: 18px 0 0;
  color: #94a3b8;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 580px;
  display: grid;
  place-items: center;
}

.gantt-decoration {
  position: absolute;
  height: 18px;
  border-radius: 999px;
  opacity: 0.75;
}

.gantt-decoration-1 {
  width: 240px;
  top: 96px;
  right: 28px;
  background: linear-gradient(90deg, rgba(34, 197, 94, 0.28), rgba(59, 130, 246, 0.28));
}

.gantt-decoration-2 {
  width: 180px;
  bottom: 110px;
  left: 12px;
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.28), rgba(59, 130, 246, 0.28));
}

.hero-app-image {
  position: relative;
  z-index: 1;
  width: min(310px, 76vw);
  height: auto;
  filter: drop-shadow(0 30px 40px rgba(15, 23, 42, 0.2));
  display: block;
}

.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.screen-header span {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: #e2e8f0;
}

.summary-card,
.task-card,
.mini-gantt {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 22px;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.06);
}

.summary-card {
  padding: 18px;
  margin-bottom: 14px;
}

.summary-card p {
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 13px;
}

.summary-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 34px;
  line-height: 1;
}

.progress-bar {
  height: 10px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.task-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  margin-bottom: 12px;
}

.task-card.active {
  border-color: rgba(59, 130, 246, 0.26);
}

.task-card p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.task-card span {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--primary);
  background: #eaf2ff;
  font-size: 12px;
  font-weight: 800;
}

.mini-gantt {
  margin-top: 18px;
  padding: 18px;
}

.mini-gantt div {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.mini-gantt div:last-child {
  margin-bottom: 0;
}

.mini-gantt span,
.mini-gantt b {
  display: block;
  height: 12px;
  border-radius: 999px;
}

.mini-gantt span {
  background: #e2e8f0;
}

.mini-gantt b {
  background: linear-gradient(90deg, var(--primary), var(--purple));
}

.mini-gantt div:nth-child(2) b {
  width: 72%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

.mini-gantt div:nth-child(3) b {
  width: 54%;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 42px;
  text-align: center;
}

.align-left {
  margin: 0;
  text-align: left;
}

.feature-grid,
.screen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card,
.screen-card,
.recommend-card,
.privacy-card,
.download-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
}

.feature-card,
.screen-card {
  padding: 28px;
}

.feature-card p,
.screen-card p,
.recommend-list,
.privacy-item span {
  color: var(--muted);
}

.feature-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 18px;
  background: var(--surface-soft);
  font-size: 24px;
}

.screen-placeholder {
  width: 100%;
  aspect-ratio: 912 / 1829;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  padding: 0;
  border-radius: 24px;
  overflow: hidden;
  background: #f8fbff;
  border: 1px solid #dbe4f5;
}

.screen-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.screen-image-button {
  color: inherit;
  font: inherit;
  cursor: zoom-in;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.screen-image-button:hover {
  transform: translateY(-3px);
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.12);
}

.screen-image-button:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.42);
  outline-offset: 4px;
}

.image-lightbox {
  width: min(92vw, 720px);
  max-width: none;
  max-height: 94dvh;
  margin: auto;
  padding: 48px 20px 20px;
  overflow: visible;
  border: 0;
  background: transparent;
}

.image-lightbox::backdrop {
  background: rgba(15, 23, 42, 0.86);
  backdrop-filter: blur(6px);
}

.image-lightbox img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(94dvh - 68px);
  margin: 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.35));
}

.lightbox-close {
  position: absolute;
  top: 0;
  right: 8px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  color: #fff;
  background: rgba(15, 23, 42, 0.72);
  font: inherit;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  background: rgba(59, 130, 246, 0.92);
}

.lightbox-close:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.75);
  outline-offset: 3px;
}

body.lightbox-open {
  overflow: hidden;
}

.recommend-section {
  padding-top: 32px;
}

.recommend-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 32px;
  align-items: center;
  padding: 40px;
  background: linear-gradient(135deg, rgba(255,255,255,0.96), rgba(238,245,255,0.96));
}

.recommend-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.recommend-list li {
  position: relative;
  padding: 14px 14px 14px 40px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
}

.recommend-list li::before {
  content: "✓";
  position: absolute;
  left: 14px;
  top: 14px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--accent);
  font-size: 12px;
  font-weight: 900;
}

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: center;
}

.privacy-card {
  padding: 18px;
}

.privacy-item {
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.privacy-item:last-child {
  border-bottom: none;
}

.privacy-item strong,
.privacy-item span {
  display: block;
}

.privacy-item strong {
  margin-bottom: 4px;
  font-size: 18px;
}

.download-section {
  padding-top: 48px;
}

.download-card {
  text-align: center;
  padding: 56px 28px;
  background:
    linear-gradient(135deg, rgba(59, 130, 246, 0.10), rgba(34, 197, 94, 0.10)),
    #fff;
}

.download-card p {
  margin-bottom: 28px;
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
}

.footer-links a:hover {
  color: var(--primary);
}

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }

  .hero-grid,
  .privacy-grid,
  .recommend-card {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
  }

  .feature-grid,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .recommend-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .section {
    padding: 72px 0;
  }

  .hero {
    padding-top: 48px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .feature-card,
  .screen-card,
  .recommend-card {
    padding: 22px;
  }

  .footer-inner {
    flex-direction: column;
  }
}


.links-section {
  padding-top: 48px;
}

.info-link-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.info-link-card {
  min-height: 164px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid rgba(226, 232, 240, 0.95);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.05);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.info-link-card:hover {
  transform: translateY(-3px);
  border-color: rgba(59, 130, 246, 0.36);
  box-shadow: 0 18px 42px rgba(37, 99, 235, 0.10);
}

.info-link-card span {
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.info-link-card strong {
  display: block;
  margin: 16px 0 6px;
  font-size: 17px;
  line-height: 1.35;
}

.info-link-card small {
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 1020px) {
  .info-link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .info-link-grid {
    grid-template-columns: 1fr;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}