/* ==================== リセット & ベース設定 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* カラーパレット：くすみブルー系 */
  --primary-color: #7ba4c7;
  --primary-light: #a8c9e3;
  --primary-dark: #4a7ba7;
  --accent-color: #9db8cd;
  --bg-color: #f8f9fa;
  --bg-secondary: #ffffff;
  --text-color: #333333;
  --text-light: #666666;
  --border-color: #e1e8ed;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --border-radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-color);
  font-size: 16px;
}

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

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-dark);
}

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ==================== ヘッダー ==================== */
header {
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  color: var(--text-color);
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}

nav a:hover,
nav a.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  transition: all 0.3s ease;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-md);
  }

  nav.active {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
  }

  nav li {
    border-bottom: 1px solid var(--border-color);
  }

  nav a {
    display: block;
    padding: 1rem 1.5rem;
    border-bottom: none;
  }
}

/* ==================== フッター ==================== */
footer {
  background-color: var(--primary-dark);
  color: white;
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ==================== コンテナ & セクション ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
  text-align: center;
  color: var(--primary-dark);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

/* ==================== ヒーロー ==================== */
.hero {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-color) 100%);
  padding: 5rem 1.5rem;
  text-align: center;
  color: white;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-profile {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.hero-profile-img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid white;
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-profile {
    flex-direction: column;
    gap: 1rem;
  }

  .hero-profile-img {
    width: 100px;
    height: 100px;
  }
}

/* ==================== ボタン ==================== */
.btn {
  display: inline-block;
  padding: 0.9rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

.btn-large {
  padding: 1.1rem 2.5rem;
  font-size: 1.1rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ==================== カード ==================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.card {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

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


.card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.card p {
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.card-meta {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 1rem;
}

.card-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--primary-color);
  font-weight: 600;
}

.card-link::after {
  content: ' →';
}

/* プレースホルダーカード */
.card-placeholder {
  border: 2px dashed var(--border-color);
  background-color: transparent;
  text-align: center;
  color: var(--text-light);
}

.card-placeholder:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}

/* ==================== ステップ（依頼の流れ） ==================== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.step {
  text-align: center;
}

.step-number {
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.step h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.step p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ==================== FAQ ==================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: flex-start;
}

.faq-question::before {
  content: 'Q.';
  color: var(--primary-color);
  font-weight: 700;
  margin-right: 0.5rem;
}

.faq-answer {
  color: var(--text-light);
  padding-left: 1.8rem;
}

/* ==================== タグ（技術スタック） ==================== */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background-color: var(--primary-light);
  color: white;
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ==================== フォーム ==================== */
.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-color);
}

.required {
  color: #e74c3c;
  margin-left: 0.25rem;
}

input[type="text"],
input[type="email"],
textarea,
select {
  width: 100%;
  padding: 0.8rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
}

textarea {
  min-height: 150px;
  resize: vertical;
}

/* ==================== プロフィール ==================== */
.profile-section {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.profile-header {
  display: flex;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2rem;
}

.profile-img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.profile-info h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.profile-subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .profile-header {
    flex-direction: column;
    text-align: center;
  }
}

/* ==================== 資格・経歴リスト ==================== */
.info-list {
  list-style: none;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.info-list li {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list li::before {
  content: '✓';
  color: var(--primary-color);
  font-weight: 700;
  margin-right: 0.8rem;
  font-size: 1.2rem;
}

/* ==================== CTA セクション ==================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 4rem 1.5rem;
  text-align: center;
  border-radius: var(--border-radius);
  margin: 2rem 0;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

/* ==================== メッセージ（成功・エラー） ==================== */
.message {
  padding: 1rem 1.5rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  display: none;
}

.message.show {
  display: block;
}

.message-success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message-error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* ==================== 注意書き ==================== */
.notice {
  background-color: #f4f7fb;
  border-left: 3px solid var(--primary-color);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 6px 6px 0;
}

.notice p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ==================== フェードアップアニメーション ==================== */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==================== ユーティリティ ==================== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* ==================== レスポンシブ調整 ==================== */
@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}