/* ============================================================
   Custom Properties
============================================================ */
:root {
  --color-primary:       #4d5e3f;
  --color-primary-dark:  #3a4830;
  --color-primary-light: #637853;
  --color-primary-pale:  #eef2eb;

  --color-text:          #1c1c1e;
  --color-text-muted:    #6b7280;
  --color-bg:            #ffffff;
  --color-bg-alt:        #f6f8f4;
  --color-border:        #e5e9e2;

  --font-body:    system-ui, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'YuGothic', sans-serif;
  --font-display: system-ui, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'YuGothic', sans-serif;

  --max-width:      1100px;
  --section-gap:    104px;
  --header-height:  72px;
  --radius-card:    16px;
  --radius-btn:     10px;
  --radius-icon:    14px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.14);

  --ease: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
dl, dt, dd { margin: 0; padding: 0; }

/* ============================================================
   Utility
============================================================ */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ============================================================
   Header
============================================================ */
.header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  transition: color var(--ease);
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}

.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero
============================================================ */

/* 共通 */
.hero,
.page-hero {
  background: var(--color-primary);
}

.hero-eyebrow,
.page-hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 12px;
}

.hero-title,
.page-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
}

/* トップページ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block-start: var(--header-height);
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 80% 30%, rgba(255, 255, 255, 0.06) 0%, transparent 55%),
    radial-gradient(ellipse 60% 70% at 10% 90%, rgba(0, 0, 0, 0.18) 0%, transparent 55%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 660px;
  padding-block: 80px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.3;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 40px;
}

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

/* ============================================================
   Buttons
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 30px;
  border-radius: var(--radius-btn);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease);
  cursor: pointer;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
}

.btn-primary:hover {
  background: #f2f4f0;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
   Sections — shared
============================================================ */
.section {
  padding-block: var(--section-gap);
}

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

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section-eyebrow-inv { color: rgba(255, 255, 255, 0.55); }
.section-title-inv   { color: #fff; }

/* ============================================================
   About
============================================================ */
.about-body {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
}

.about-body p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

.about-body p + p {
  margin-top: 18px;
}

/* ============================================================
   Profile
============================================================ */
.profile-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 64px;
  max-width: 900px;
  margin-inline: auto;
}

.profile-block-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 28px;
}

/* Timeline */
.timeline {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--color-border);
  padding-left: 24px;
  margin-left: 4px;
}

.timeline-item {
  position: relative;
  padding-bottom: 28px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg-alt);
  outline: 2px solid var(--color-primary);
}

.timeline-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary-light);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.timeline-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Awards */
.award-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.award-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.award-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--color-primary-pale);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-top: 1px;
}

.award-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 2px;
}

.award-year {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ============================================================
   Works
============================================================ */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.work-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform var(--ease), box-shadow var(--ease);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.work-thumb {
  padding: 32px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.work-icon {
  width: 96px;
  height: 96px;
  border-radius: 22%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
}

.work-icon-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 22%;
  background: var(--color-border);
}

.work-body {
  padding: 22px 24px 26px;
}

.work-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.tag-ios {
  background: #e0eaff;
  color: #3451b2;
}

.tag-android {
  background: #e6f4ea;
  color: #2e7d32;
}

.badge-soon {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--color-primary-pale);
  color: var(--color-primary);
}

.work-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.work-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.work-card-placeholder .work-name {
  color: var(--color-text-muted);
}

/* ============================================================
   Contact
============================================================ */
.contact-section {
  background: var(--color-primary);
}

.contact-body {
  text-align: center;
}

.contact-body > p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 32px;
}

.email-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: rgba(255, 255, 255, 0.10);
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-btn);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background var(--ease), border-color var(--ease), transform var(--ease);
}

.email-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

/* ============================================================
   Footer
============================================================ */
.footer {
  background: #191d17;
  color: rgba(255, 255, 255, 0.6);
  padding-block: 60px 32px;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  gap: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 110px;
}

.footer-brand img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.8;
}

.footer-brand span {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.02em;
}

.footer-info dl {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-row {
  display: flex;
  gap: 24px;
  font-size: 0.875rem;
}

.footer-row dt {
  color: rgba(255, 255, 255, 0.35);
  min-width: 72px;
  flex-shrink: 0;
}

.footer-row dd a {
  transition: color var(--ease);
}

.footer-row dd a:hover {
  color: #fff;
}

.footer-copy {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.25);
  text-align: center;
}

/* ============================================================
   Responsive — tablet
============================================================ */
@media (max-width: 900px) {
  .profile-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   Responsive — mobile
============================================================ */
@media (max-width: 640px) {
  :root {
    --section-gap: 72px;
  }

  /* Nav */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    inset-block-start: var(--header-height);
    inset-inline: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 8px 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-link {
    display: block;
    padding: 14px 24px;
    font-size: 1rem;
  }

  /* Hero */
  .hero-content {
    padding-block: 64px;
  }

  .hero-desc br {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  /* Grids */
  .works-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-inline: auto;
  }

  /* Footer */
  .footer-inner {
    flex-direction: column;
    align-items: center;
    gap: 32px;
    text-align: center;
  }

  .footer-row {
    flex-direction: column;
    gap: 2px;
    align-items: center;
  }

  .footer-row dt {
    min-width: auto;
  }
}

/* ============================================================
   Page Hero (サブページ共通)
============================================================ */
.page-hero {
  padding-block: 80px 56px;
  padding-block-start: calc(var(--header-height) + 80px);
}

.page-hero-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
}

/* ============================================================
   Legal (特定商取引法など)
============================================================ */
.legal-section {
  padding-block: 72px;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.75;
}

.legal-table th,
.legal-table td {
  padding: 18px 24px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  width: 220px;
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.legal-table td {
  color: var(--color-text-muted);
}

.legal-note {
  padding: 20px 24px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

* + .legal-note {
  margin-top: 32px;
}

@media (max-width: 640px) {
  .page-hero {
    padding-block-start: calc(var(--header-height) + 48px);
    padding-block-end: 40px;
  }

  .legal-section {
    padding-block: 48px;
  }

  .legal-table th {
    width: auto;
    white-space: normal;
  }

  .legal-table,
  .legal-table tbody,
  .legal-table tr,
  .legal-table th,
  .legal-table td {
    display: block;
    width: 100%;
  }

  .legal-table tr {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
  }

  .legal-table th,
  .legal-table td {
    border: none;
    border-bottom: 1px solid var(--color-border);
    padding: 14px 18px;
  }

  .legal-table td:last-child {
    border-bottom: none;
  }
}

/* ============================================================
   Legal — 条文（プライバシーポリシーなど）
============================================================ */
.legal-articles {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.legal-article-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.legal-article p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.85;
}

.legal-list {
  margin-top: 12px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.85;
}

.legal-list-ordered {
  list-style: decimal;
  padding-left: 1.5em;
}

.legal-list-inner {
  list-style: lower-latin;
  padding-left: 1.5em;
  margin-top: 8px;
}

.legal-list li + li {
  margin-top: 8px;
}

.legal-contact {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9375rem;
}

.legal-contact-row {
  display: flex;
  gap: 24px;
}

.legal-contact-row dt {
  min-width: 100px;
  font-weight: 600;
  color: var(--color-text);
  flex-shrink: 0;
}

.legal-contact-row dd {
  color: var(--color-text-muted);
}

.legal-contact-row dd a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 640px) {
  .legal-contact-row {
    flex-direction: column;
    gap: 2px;
  }
}