/* =========================================
   8wit base.css
   全ページ共通スタイル
   ========================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               system-ui, "Hiragino Sans", "Noto Sans JP",
               "Yu Gothic", "Meiryo", sans-serif;
  color: #111111;
  background-color: #ffffff;
  line-height: 1.7;
  font-size: 16px;
}

/* 色・余白などの変数 */
:root {
  --color-primary: #8bdc3f;        /* メインの黄緑 */
  --color-primary-dark: #5ea320;   /* 濃いめアクセント */
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7f9;
  --color-text: #111111;
  --color-muted: #666666;
  --color-border: #e2e4e7;

  --max-width: 1100px;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-soft: 0 14px 30px rgba(0, 0, 0, 0.06);
}

/* -----------------------------------------
   ベーステキスト
----------------------------------------- */

a {
  color: var(--color-primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3 {
  line-height: 1.4;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-inner h2 {
  font-size: 1.9rem;
  margin: 0 0 1.5rem;
}

.section-inner p {
  margin: 0 0 1.1rem;
}

/* スマホ時の余白調整 */
@media (max-width: 768px) {
  .section-inner {
    padding: 3rem 1.1rem;
  }
}

/* -----------------------------------------
   ヘッダー・ナビ
----------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.4rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo img {
  height: 40px;
  display: block;
}

/* PCナビ */
.global-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-size: 0.9rem;
}

.global-nav a {
  text-decoration: none;
  color: var(--color-muted);
  position: relative;
  padding-bottom: 0.2rem;
}

.global-nav a:hover,
.global-nav a:focus-visible {
  color: var(--color-primary-dark);
}

.global-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  transition: width 0.18s ease-out;
}

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

/* スマホ用簡易対応 */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.5rem 1rem 0.6rem;
  }

  .global-nav ul {
    flex-wrap: wrap;
    gap: 0.75rem 1.2rem;
    font-size: 0.85rem;
  }
}

/* -----------------------------------------
   HERO セクション（CSSのみ背景）
----------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  color: #ffffff;
  background-color: #05060a;
}

/* 背景グラデーション＋光 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 0% 0%, rgba(139, 220, 63, 0.35), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(139, 220, 63, 0.45), transparent 55%),
    linear-gradient(135deg, #05060a 0%, #05060a 40%, #0b1015 100%);
}

/* 薄いグリッドでAI感 */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(transparent 31px, rgba(255, 255, 255, 0.06) 32px),
    linear-gradient(90deg, transparent 31px, rgba(255, 255, 255, 0.06) 32px);
  background-size: 32px 32px;
  opacity: 0.35;
  mix-blend-mode: screen;
}

.hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4.5rem 1.5rem 4.8rem;
}

.hero h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.9rem, 3vw + 1rem, 2.6rem);
  line-height: 1.3;
}

.hero-sub {
  max-width: 700px;
  margin: 0 0 2rem;
  font-size: 0.98rem;
  color: #e4e7ec;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

/* -----------------------------------------
   ボタン
----------------------------------------- */

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s ease-out, box-shadow 0.12s ease-out,
              background-color 0.12s ease-out, color 0.12s ease-out;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #050608;
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 35px rgba(0, 0, 0, 0.16);
}

.btn-secondary {
  background-color: transparent;
  color: #f4f5f7;
  border-color: rgba(255, 255, 255, 0.6);
}

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

/* -----------------------------------------
   セクション背景のバリエーション
----------------------------------------- */

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

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

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

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

.section-works,
.section-group,
.section-contact-cta {
  background-color: var(--color-bg);
}

/* -----------------------------------------
   サービスカード（グリッド）
----------------------------------------- */

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.6rem;
  margin-top: 2rem;
}

.service-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.6rem 1.5rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.service-card h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.service-card p {
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
}

.service-link a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--color-primary-dark);
}

.service-link a::after {
  content: " →";
}

/* スマホで1カラム */
@media (max-width: 768px) {
  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    padding: 1.4rem 1.3rem 1.3rem;
  }
}

/* -----------------------------------------
   汎用リスト・補足テキスト
----------------------------------------- */

.ai-points {
  list-style: none;
  margin: 1rem 0 1.5rem;
  padding: 0;
}

.ai-points li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}

.ai-points li::before {
  content: "●";
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-size: 0.6rem;
  color: var(--color-primary-dark);
}

.note {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* グループリンク */
.group-links {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.group-links li {
  margin-bottom: 0.4rem;
}

/* -----------------------------------------
   company-box（運営情報）・フォーム
----------------------------------------- */

.company-box {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-soft);
}

/* お問い合わせフォーム（使う場合用） */
.contact-form {
  max-width: 640px;
  margin-top: 1.5rem;
}

.contact-form-row {
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.contact-form-row label {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-form-row input,
.contact-form-row textarea {
  font: inherit;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  outline: none;
}

.contact-form-row input:focus-visible,
.contact-form-row textarea:focus-visible {
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 2px rgba(139, 220, 63, 0.3);
}

/* -----------------------------------------
   CTA セクション
----------------------------------------- */

.section-contact-cta {
  text-align: center;
}

.section-contact-cta .section-inner {
  max-width: 700px;
}

/* -----------------------------------------
   フッター
----------------------------------------- */

.site-footer {
  background-color: #050608;
  color: #9ea2b0;
  padding: 1.5rem 1.5rem 1.8rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-logo {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.footer-copy {
  margin: 0;
}

/* フッター内のリンク（FAQ 等） */
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0 0 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
}

.footer-links a {
  color: #9ea2b0;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}