/* Critical CSS - Above-the-fold styles */
/* 初期ロード時に必要な最小限のスタイル */

/* CSS変数定義 - critical */
:root {
  --primary-color: #009fe8;
  --primary-hover: #0084c4;
  --text-primary: #333;
  --bg-primary: #fff;
  --transition-default: all 0.3s ease;
  --focus-outline: 3px solid #0066cc;
  --focus-outline-offset: 2px;
}

/* 基本スタイル - critical */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: clamp(14px, 2.5vw, 18px);
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* ヒーローセクション - critical */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem;
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-hover) 100%
  );
  color: white;
  position: relative;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.brand-name {
  display: block;
  background: linear-gradient(45deg, #ffffff, #e6f7ff);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  margin-bottom: 3rem;
  opacity: 0.95;
}

/* ボタン - critical */
.cta-button {
  padding: 1rem 2.2rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-default);
  text-decoration: none;
  display: inline-block;
  position: relative;
}

.cta-button.primary {
  background: linear-gradient(45deg, #ffffff, #e6f7ff);
  color: var(--primary-color);
}

.cta-button.secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* フォーカススタイル */
*:focus {
  outline: none;
  outline-offset: 0;
}

/* レスポンシブ - critical */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1rem;
    min-height: 60vh;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-button {
    width: 100%;
    max-width: 300px;
  }
}

/* アニメーション無効化対応 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}