* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

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

body {
font-family: 'ヒラギノ角ゴ Pro', 'Hiragino Kaku Gothic Pro', '游ゴシック Medium', '游ゴシック体', YuGothic, 'Yu Gothic', sans-serif;
line-height: 1.8;
color: #2d2d2d;
font-weight: 500;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}

/* 12カラムグリッドシステム */
.container {
width: 100%;
max-width: 1200px;
margin: 0 auto;
padding: 0 15px;
}

.row {
display: grid;
grid-template-columns: repeat(12, 1fr);
gap: 15px;
}

[class*='col-'] {
padding: 15px;
}

.col-12 { grid-column: span 12; }
.col-11 { grid-column: span 11; }
.col-10 { grid-column: span 10; }
.col-9 { grid-column: span 9; }
.col-8 { grid-column: span 8; }
.col-7 { grid-column: span 7; }
.col-6 { grid-column: span 6; }
.col-5 { grid-column: span 5; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }
.col-2 { grid-column: span 2; }
.col-1 { grid-column: span 1; }

/* ヒーローセクション */
header {
background: linear-gradient(135deg, rgb(68,5,6) 0%, rgb(40,2,3) 100%);
color: #fafafa;
padding: 120px 15px;
text-align: center;
min-height: 70vh;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}

header h1 {
font-size: clamp(2rem, 8vw, 3.5rem);
margin-bottom: 20px;
font-weight: 700;
}

header p {
font-size: clamp(1rem, 3vw, 1.2rem);
margin-bottom: 10px;
opacity: 0.95;
}

/* ナビゲーション */
nav {
background-color: #fafafa;
box-shadow: 0 2px 8px rgba(68, 5, 6, 0.08);
position: sticky;
top: 0;
z-index: 1000;
transition: transform 0.3s ease;
display: flex;
align-items: center;
justify-content: space-between;
padding: 0 15px;
border-bottom: 2px solid rgba(68, 5, 6, 0.1);
}

nav.hidden {
transform: translateY(-100%);
}

nav.fixed {
position: fixed;
width: 100%;
top: 0;
padding: 0 15px;
}

/* ハンバーガーボタン */
.hamburger {
display: none;
flex-direction: column;
background: none;
border: none;
cursor: pointer;
padding: 8px;
gap: 6px;
z-index: 1001;
}

.hamburger span {
display: block;
width: 25px;
height: 3px;
background-color: rgb(68, 5, 6);
border-radius: 2px;
transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
opacity: 0;
}

.hamburger.active span:nth-child(3) {
transform: rotate(-45deg) translate(7px, -7px);
}

nav ul {
list-style: none;
display: flex;
flex-wrap: wrap;
align-items: center;
padding: 0;
max-width: 1200px;
margin: 0 auto;
flex: 1;
}

nav > ul > li {
position: relative;
padding: 0;
margin: 0;
}

nav > ul > li > a {
display: block;
padding: 15px 20px;
color: rgb(40, 2, 3);
text-decoration: none;
font-weight: 600;
white-space: nowrap;
transition: background-color 0.3s, color 0.3s;
}

nav > ul > li > a:hover {
background-color: rgba(68, 5, 6, 0.05);
color: rgb(68, 5, 6);
}

/* サブメニュートリガー */
nav > ul > li > a[data-submenu]::after {
content: ' ▼';
font-size: 0.8em;
margin-left: 5px;
}

/* ポップアップメニュー（モーダル） */
.modal {
display: none;
position: fixed;
z-index: 2000;
left: 0;
top: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
animation: fadeIn 0.3s ease;
}

.modal.show {
display: flex;
align-items: center;
justify-content: center;
}

.modal-content {
background-color: #fff;
padding: 30px;
border-radius: 8px;
max-width: 90%;
width: 500px;
max-height: 90vh;
overflow-y: auto;
animation: slideUp 0.3s ease;
box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.modal-content ul {
list-style: none;
}

.modal-content li {
padding: 12px 0;
border-bottom: 1px solid #eee;
}

.modal-content li:last-child {
border-bottom: none;
}

.modal-content a {
color: rgb(68, 5, 6);
text-decoration: none;
font-weight: 600;
display: block;
padding: 10px;
transition: color 0.3s;
}

.modal-content a:hover {
color: rgb(40, 2, 3);
}

.modal-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 20px;
padding-bottom: 15px;
border-bottom: 2px solid rgb(68, 5, 6);
}

.modal-header h2 {
color: #333;
font-size: 1.5rem;
}

.close-btn {
background: none;
border: none;
font-size: 1.5rem;
cursor: pointer;
color: #999;
transition: color 0.3s;
}

.close-btn:hover {
color: #333;
}

@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}

@keyframes slideUp {
from {
  transform: translateY(50px);
  opacity: 0;
}
to {
  transform: translateY(0);
  opacity: 1;
}
}

/* セクション */
section {
padding: 60px 15px;
border-bottom: 1px solid #eee;
}

section h2 {
font-size: clamp(1.5rem, 4vw, 2.5rem);
margin-bottom: 30px;
color: rgb(68, 5, 6);
font-weight: 700;
border-bottom: 3px solid rgb(68, 5, 6);
padding-bottom: 15px;
}

section h3 {
font-size: 1.3rem;
margin-bottom: 15px;
color: rgb(68, 5, 6);
font-weight: 700;
}

section p {
margin-bottom: 15px;
line-height: 1.8;
}

/* フッター */
footer {
background-color: rgb(40, 2, 3);
color: #fafafa;
padding: 30px 15px;
text-align: center;
border-top: 3px solid rgb(68, 5, 6);
}
padding: 40px 15px;
text-align: center;
}

/* レスポンシブ調整 */
@media (max-width: 768px) {
header {
  padding: 80px 15px;
  min-height: 50vh;
}

header h1 {
  font-size: 2rem;
}

header p {
  font-size: 0.95rem;
}

.hamburger {
  display: flex;
}

nav ul {
  position: fixed;
  left: -100%;
  top: 60px;
  flex-direction: column;
  background-color: #fff;
  width: 100%;
  text-align: left;
  transition: left 0.3s;
  box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
  padding: 20px 0;
  max-width: none;
  margin: 0;
  flex: none;
}

nav ul.active {
  left: 0;
}

nav > ul > li {
  width: 100%;
  border-bottom: 1px solid rgba(68, 5, 6, 0.1);
  padding: 0;
}

nav > ul > li:last-child {
  border-bottom: none;
}

nav > ul > li > a {
  padding: 15px 20px;
  display: block;
}

nav > ul > li > a {
  padding: 15px 20px;
}

.modal-content {
  width: 95%;
}

section {
  padding: 40px 15px;
}

section h2 {
  font-size: 1.5rem;
}

.col-6 { grid-column: span 12; }
.col-4 { grid-column: span 12; }
.col-3 { grid-column: span 6; }
}

@media (max-width: 480px) {
header {
  padding: 60px 15px;
  min-height: 40vh;
}

header h1 {
  font-size: 1.5rem;
}

nav > ul > li > a {
  padding: 12px 15px;
}

section {
  padding: 30px 15px;
}

section h2 {
  font-size: 1.3rem;
}

.col-3 { grid-column: span 12; }
}