/* =========================================
   外構費用シミュレーター デモ - style.css
   - カラー: 白 / 淡いグリーン / ベージュ / ダークグレー
   - レスポンシブ対応 (PC / タブレット / スマホ)
   ========================================= */

/* ---------- カラー & トークン ---------- */
:root {
  /* ベース */
  --color-bg: #fbfaf6;          /* やや温かみのある白 */
  --color-surface: #ffffff;
  --color-beige: #f3ede1;       /* ベージュ */
  --color-beige-deep: #e7dfd0;
  --color-line: #e6e3da;

  /* グリーン */
  --color-green-50: #f1f5ee;
  --color-green-100: #dde7d4;
  --color-green-300: #a8c39a;   /* 淡いグリーン */
  --color-green-500: #6f9461;   /* メインアクセント */
  --color-green-700: #4f7445;

  /* テキスト */
  --color-text: #2c322f;        /* ダークグレー (グリーン寄り) */
  --color-text-sub: #6b7470;
  --color-text-muted: #9aa19c;

  /* ステータス */
  --color-shadow: 0 6px 24px rgba(60, 80, 60, 0.06);
  --color-shadow-lg: 0 18px 48px rgba(60, 80, 60, 0.10);

  /* レイアウト */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --space-section: clamp(64px, 9vw, 120px);
  --max-width: 1160px;

  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --font-serif: "Noto Serif JP", "Yu Mincho", serif;
}

/* ---------- リセット ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

p {
  margin: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.pc-only {
  display: inline;
}

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

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 246, 0.85);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, var(--color-green-300) 0%, var(--color-green-500) 60%, var(--color-green-700) 100%);
  position: relative;
  flex-shrink: 0;
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--color-bg);
  opacity: 0.18;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.logo-sub {
  font-size: 11px;
  color: var(--color-text-sub);
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--color-text-sub);
}

.nav a {
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.nav a:hover {
  color: var(--color-green-700);
}

@media (max-width: 540px) {
  .nav {
    gap: 16px;
    font-size: 13px;
  }
  .logo-sub {
    display: none;
  }
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 500;
  font-size: 15px;
  padding: 14px 26px;
  border-radius: 999px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-green-500);
  color: #fff;
  box-shadow: 0 8px 20px rgba(111, 148, 97, 0.28);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-green-700);
  transform: translateY(-1px);
}
.btn-primary:disabled {
  background: var(--color-line);
  color: var(--color-text-muted);
  box-shadow: none;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-text);
  color: #fff;
}
.btn-secondary:hover {
  background: #1d2320;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-sub);
  border: 1px solid var(--color-line);
}
.btn-ghost:hover {
  border-color: var(--color-green-500);
  color: var(--color-green-700);
}

.btn-block {
  width: 100%;
}

.btn-arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}
.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  padding: clamp(56px, 8vw, 96px) 0 var(--space-section);
  background:
    radial-gradient(1000px 500px at 90% -10%, var(--color-green-50) 0%, transparent 60%),
    radial-gradient(800px 400px at -10% 60%, var(--color-beige) 0%, transparent 70%),
    var(--color-bg);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--color-green-700);
  background: var(--color-green-50);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4.4vw, 46px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  text-wrap: pretty;
}

.hero-title .accent {
  color: var(--color-green-700);
  position: relative;
  display: inline-block;
}
.hero-title .accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6px;
  height: 8px;
  background: var(--color-green-100);
  z-index: -1;
  border-radius: 4px;
}

.hero-desc {
  color: var(--color-text-sub);
  font-size: 15.5px;
  margin-bottom: 32px;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-note {
  font-size: 13px;
  color: var(--color-text-muted);
}

.hero-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  border-top: 1px solid var(--color-line);
  padding-top: 28px;
}

.hero-points li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.point-num {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--color-green-700);
  letter-spacing: 0.1em;
}

.point-text {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
}

@media (max-width: 540px) {
  .hero-points {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ---------- ヒーロー右側ビジュアル ---------- */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--color-shadow-lg);
  border: 1px solid var(--color-line);
  transform: rotate(-1.5deg);
  z-index: 2;
}

.hero-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.hero-card-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
}

.hero-card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green-500);
  box-shadow: 0 0 0 4px var(--color-green-50);
}

.hero-card-caption {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 6px;
}

.hero-card-price {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 14px;
}
.hero-card-price span {
  color: var(--color-green-700);
  font-size: 36px;
}

.hero-card-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--color-green-50);
  margin-bottom: 22px;
  overflow: hidden;
}
.hero-card-bar span {
  display: block;
  height: 100%;
  width: 62%;
  background: linear-gradient(90deg, var(--color-green-300), var(--color-green-500));
  border-radius: 999px;
}

.hero-card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px dashed var(--color-line);
  padding-top: 16px;
}
.hero-card-list li {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
}
.hero-card-list span {
  color: var(--color-text-muted);
}
.hero-card-list strong {
  font-weight: 500;
  color: var(--color-text);
}

/* 装飾の葉 */
.hero-leaf {
  position: absolute;
  border-radius: 60% 40% 60% 40% / 50% 60% 40% 50%;
  background: var(--color-green-100);
  z-index: 1;
}
.hero-leaf-1 {
  width: 140px;
  height: 140px;
  top: -30px;
  right: -10px;
  background: var(--color-green-100);
  opacity: 0.7;
}
.hero-leaf-2 {
  width: 110px;
  height: 110px;
  bottom: -20px;
  left: 0;
  background: var(--color-beige);
  opacity: 0.8;
}

/* ---------- セクション共通 ---------- */
section.simulator,
section.about-demo,
section.summary-section {
  padding: var(--space-section) 0;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-green-700);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--color-text-sub);
  font-size: 15px;
  text-wrap: pretty;
}

/* ---------- カード共通 ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--color-shadow);
}

@media (max-width: 540px) {
  .card {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }
}

/* ---------- シミュレーター本体 ---------- */
.simulator {
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-green-50) 100%);
}

.sim-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  align-items: start;
}

@media (max-width: 980px) {
  .sim-grid {
    grid-template-columns: 1fr;
  }
}

.sim-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sim-card-head {
  margin-bottom: 22px;
}

.step-badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-green-700);
  background: var(--color-green-50);
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.sim-card-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.sim-card-desc {
  font-size: 13.5px;
  color: var(--color-text-sub);
}

/* ---------- オプションボタン ---------- */
.option-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.option-grid.scale {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 720px) {
  .option-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 420px) {
  .option-grid:not(.scale) {
    grid-template-columns: 1fr;
  }
}

.option-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 6px;
  padding: 18px 16px;
  background: var(--color-surface);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  text-align: left;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all 0.18s ease;
  position: relative;
  min-height: 72px;
}

.option-btn:hover {
  border-color: var(--color-green-300);
  background: var(--color-green-50);
}

.option-btn.is-selected {
  border-color: var(--color-green-500);
  background: var(--color-green-50);
  box-shadow: 0 4px 14px rgba(111, 148, 97, 0.18);
}

.option-btn .opt-label {
  display: block;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.4;
}

.option-btn .opt-meta {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.option-btn .opt-check {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--color-line);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.option-btn.is-selected .opt-check {
  background: var(--color-green-500);
  border-color: var(--color-green-500);
}
.option-btn.is-selected .opt-check::after {
  content: "";
  width: 8px;
  height: 4px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translate(1px, -1px);
}

/* スケール用の中央寄せレイアウト */
.option-grid.scale .option-btn {
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 88px;
  padding: 18px 12px;
}
.option-grid.scale .option-btn .opt-label {
  text-align: center;
}

/* ---------- 結果カード ---------- */
.sim-result {
  position: sticky;
  top: 88px;
}

@media (max-width: 980px) {
  .sim-result {
    position: static;
  }
}

.result-card {
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
}

.result-head {
  background: var(--color-text);
  color: #fff;
  padding: 22px 28px 18px;
}

.result-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--color-green-300);
  margin-bottom: 4px;
}

.result-caption {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.result-price-block {
  padding: 28px 28px 8px;
  text-align: center;
}

.result-price {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  letter-spacing: 0.01em;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-wrap: balance;
}
.result-price .empty {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 14px;
  color: var(--color-text-muted);
}
.result-price .price-sep {
  display: inline-block;
  margin: 0 6px;
  color: var(--color-text-muted);
  font-weight: 400;
}
.result-price .unit {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-sub);
  margin-left: 2px;
}

.result-range-bar {
  height: 6px;
  background: var(--color-green-50);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 8px;
}
.result-range-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-green-300), var(--color-green-500));
  border-radius: 999px;
  transition: width 0.4s ease;
}

.result-summary {
  padding: 20px 28px 0;
}

.result-summary-title {
  font-size: 13px;
  color: var(--color-text-sub);
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.result-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.result-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 13.5px;
}

.result-row dt {
  margin: 0;
  color: var(--color-text-muted);
  font-weight: 400;
}

.result-row dd {
  margin: 0;
  color: var(--color-text);
  font-weight: 500;
  word-break: break-word;
}

.result-note {
  margin: 18px 28px 0;
  padding: 12px 14px;
  background: var(--color-beige);
  color: var(--color-text-sub);
  font-size: 12px;
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 28px 28px;
}

/* ---------- サマリーセクション ---------- */
.summary-section {
  background: var(--color-beige);
}

.summary-card {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px;
}

@media (max-width: 540px) {
  .summary-card {
    padding: 28px 22px;
  }
}

.summary-head {
  text-align: center;
  margin-bottom: 32px;
}
.summary-head .section-title {
  margin-bottom: 8px;
}

.summary-list {
  margin: 0 0 24px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--color-line);
}
.summary-list .summary-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}
.summary-list dt {
  margin: 0;
  color: var(--color-text-sub);
  font-weight: 500;
}
.summary-list dd {
  margin: 0;
  color: var(--color-text);
  font-weight: 500;
  word-break: break-word;
}
.summary-list .summary-row.is-price dd {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--color-green-700);
  font-weight: 700;
}

@media (max-width: 540px) {
  .summary-list .summary-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .summary-list dt {
    font-size: 12px;
    color: var(--color-text-muted);
  }
}

.summary-message {
  background: var(--color-green-50);
  color: var(--color-green-700);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  margin-bottom: 24px;
  line-height: 1.6;
}

.summary-actions {
  text-align: center;
}

/* ---------- このデモについて ---------- */
.about-demo {
  background: var(--color-bg);
}

.about-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}

@media (max-width: 900px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.about-text .section-title {
  margin-bottom: 18px;
}

.about-desc {
  color: var(--color-text-sub);
  font-size: 15px;
  margin-bottom: 28px;
  text-wrap: pretty;
}

.about-features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.about-features li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feature-icon {
  color: var(--color-green-500);
  font-size: 14px;
  margin-top: 4px;
  flex-shrink: 0;
}

.about-features h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text);
}

.about-features p {
  font-size: 13.5px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

.about-card {
  background: var(--color-text);
  color: #fff;
  border: none;
  padding: 36px;
  position: relative;
  overflow: hidden;
}
.about-card::before {
  content: "";
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(168, 195, 154, 0.18);
  top: -80px;
  right: -80px;
}

.about-card-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--color-green-300);
  margin-bottom: 12px;
  position: relative;
}

.about-card-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
  position: relative;
}

.about-card-desc {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
  position: relative;
}

/* ---------- フッター ---------- */
.site-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 36px 0;
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 15px;
  color: #fff;
}

.footer-sub {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
}

.footer-copy {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 540px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- アニメーション (最小限) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .result-price,
  .result-row dd {
    transition: color 0.2s ease;
  }
}