/* ベース設定 */
:root {
  --color-bg: #f9fafb;
  --color-bg-alt: #ffffff;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-accent: #10b981; /* グリーン */
  --color-accent-soft: #d1fae5;
  --color-accent-strong: #059669;
  --color-shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.12);
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition-fast: 0.18s ease-out;
  --transition-normal: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
}

/* 共通レイアウト */
.container {
  width: min(1120px, 100% - 40px);
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background-color: #f3f4f6;
}

.section-heading {
  margin-bottom: 40px;
}

.section-heading h2 {
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 28px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.section-heading .section-subtitle {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.section-heading.center {
  text-align: center;
}

/* ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background-color: rgba(249, 250, 251, 0.85);
  border-bottom: 1px solid rgba(229, 231, 235, 0.7);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
}

.logo a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 0% 0%, #3b82f6, var(--color-accent));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #f9fafb;
  font-weight: 700;
  font-family: "Poppins", sans-serif;
  font-size: 18px;
}

.logo-text {
  font-family: "Poppins", sans-serif;
  font-size: 16px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ナビゲーション */
.nav {
  position: relative;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
  font-size: 14px;
}

.nav-list a {
  text-decoration: none;
  color: var(--color-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: "Poppins", sans-serif;
  font-weight: 500;
  position: relative;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #3b82f6, var(--color-accent));
  transition: width var(--transition-fast);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--color-text);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  width: 100%;
}

/* ハンバーガー */
.nav-toggle {
  display: none;
  border: none;
  background: none;
  padding: 4px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 999px;
  transition: transform 0.18s ease, opacity 0.18s ease, translate 0.18s ease;
}

.nav-toggle span + span {
  margin-top: 5px;
}

/* ヒーロー */
.hero {
  padding: 80px 0 72px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-eyebrow {
  font-family: "Poppins", sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-size: 11px;
  margin: 0 0 16px;
}

.hero h1 {
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.2;
  margin: 0 0 16px;
  letter-spacing: 0.02em;
}

.hero-desc {
  margin: 0 0 24px;
  color: var(--color-muted);
  font-size: 15px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), transform 0.12s ease, box-shadow 0.12s ease, color var(--transition-normal);
}

.btn.primary {
  background: linear-gradient(135deg, #3b82f6, var(--color-accent));
  color: #f9fafb;
  box-shadow: var(--color-shadow-soft);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 55px rgba(15, 23, 42, 0.22);
}

.btn.ghost {
  border-color: var(--color-border);
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-text);
}

.btn.ghost:hover {
  border-color: var(--color-accent);
}

.btn.full {
  width: 100%;
}

/* ヒーロー写真 */
.hero-photo {
  display: flex;
  justify-content: flex-end;
}

.hero-photo-frame {
  width: 100%;
  max-width: 380px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  box-shadow: var(--color-shadow-soft);
}

.hero-photo-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.18), transparent 55%);
  pointer-events: none;
}

.hero-photo-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* About */
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.4fr);
  gap: 40px;
  align-items: flex-start;
}

.about-content {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.2fr);
  gap: 24px;
  align-items: center;
}

.about-photo img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.14);
}

.about-text p {
  margin: 0 0 10px;
  font-size: 14px;
}

.about-location {
  color: var(--color-muted);
  font-size: 13px;
}

/* Works */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.work-item {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  background-color: #111827;
  cursor: pointer;
}

.work-item img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 260px;
  object-fit: cover;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.work-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.9), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.work-item figcaption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  color: #f9fafb;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: "Poppins", sans-serif;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.work-item:hover img {
  transform: scale(1.04);
  opacity: 0.9;
}

.work-item:hover::after {
  opacity: 1;
}

.work-item:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

.works-note {
  margin-top: 18px;
  font-size: 12px;
  color: var(--color-muted);
}

/* Price */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.price-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 20px 20px 22px;
  border: 1px solid var(--color-border);
  position: relative;
}

.price-card.featured {
  border-color: var(--color-accent);
  box-shadow: var(--color-shadow-soft);
  transform: translateY(-4px);
}

.price-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.price-amount {
  margin: 0 0 10px;
  font-weight: 700;
  font-size: 18px;
}

.price-amount span {
  font-weight: 400;
  font-size: 12px;
  color: var(--color-muted);
  margin-left: 4px;
}

.price-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--color-muted);
}

.price-card ul li + li {
  margin-top: 6px;
}

.price-tag {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background-color: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

.price-note {
  margin-top: 16px;
  font-size: 12px;
  color: var(--color-muted);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
  gap: 32px;
  align-items: flex-start;
}

.contact-text p {
  font-size: 14px;
  margin: 0 0 10px;
}

.contact-mail a {
  color: var(--color-accent-strong);
  text-decoration: none;
}

.contact-note {
  font-size: 12px;
  color: var(--color-muted);
}

/* フォーム */
.contact-form {
  background-color: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 20px 20px 22px;
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 11px;
  font-size: 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background-color: #f9fafb;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  font-family: inherit;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.3);
  background-color: #ffffff;
}

.form-message {
  margin-top: 8px;
  font-size: 13px;
  min-height: 18px;
}

/* フッター */
.site-footer {
  padding: 18px 0 24px;
  font-size: 12px;
  color: var(--color-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.back-to-top {
  text-decoration: none;
  color: var(--color-muted);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "Poppins", sans-serif;
}

.back-to-top:hover {
  color: var(--color-text);
}

/* レスポンシブ */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-photo {
    order: -1;
    justify-content: center;
  }

  .hero {
    padding-top: 70px;
  }

  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .price-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .section {
    padding: 60px 0;
  }

  .header-inner {
    padding: 6px 0;
  }

  .nav-list {
    position: absolute;
    right: 0;
    top: 140%;
    background-color: rgba(249, 250, 251, 0.98);
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 14px;
    min-width: 170px;
    transform-origin: top right;
    transform: scale(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.16s ease, transform 0.16s ease;
  }

  .nav-list.open {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 6px 4px;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }

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

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

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

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .works-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-photo-frame {
    max-width: 320px;
  }
}