@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Playfair+Display:wght@700&display=swap');

:root {
  --primary-color: #5d1010;
  --secondary-color: #2c3e50;
  --accent-color: #c0392b;
  --bg-color: #fffaf0;
  --border-color: #dcdde1;
  --text-color: #2f3640;
  --note-bg: #f8f9fa;
  --weekend-sun: #e84118;
  --weekend-sat: #0097e6;
  --accent-image: none;
  --accent-opacity-top: 0;
  --accent-opacity-bottom: 0;
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: #f0f2f5;
  color: var(--text-color);
  line-height: 1.4;
  margin: 0;
}

/* アプリ全体レイアウト */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* カレンダープレビューエリア */
.preview-area {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px;
  padding-top: 68px;
  overflow: auto;
  background: #f0f2f5;
}

/* カレンダーコンテナ */
.calendar-preview {
  width: 1120px;
  aspect-ratio: 1.414 / 1;
  background: white;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  position: relative;
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  margin: auto;
}

/* 季節の装飾（コーナー） */
.calendar-preview::before {
  content: "";
  position: absolute;
  top: -20px;
  right: -20px;
  width: 250px;
  height: 250px;
  background-image: var(--accent-image);
  background-size: contain;
  background-repeat: no-repeat;
  opacity: var(--accent-opacity-top);
  z-index: 0;
  pointer-events: none;
}

.calendar-preview::after {
  content: "";
  position: absolute;
  bottom: -30px;
  left: -30px;
  width: 200px;
  height: 200px;
  background-image: var(--accent-image);
  background-size: contain;
  background-repeat: no-repeat;
  opacity: var(--accent-opacity-bottom);
  z-index: 0;
  pointer-events: none;
  transform: rotate(180deg) scaleX(-1);
}

/* ヘッダー */
header {
  margin-bottom: 30px;
  text-align: center;
  border-bottom: 3px double var(--accent-color);
  padding-bottom: 20px;
  position: relative;
  z-index: 1;
}

h1 {
  font-family: 'Playfair Display', serif;
  font-size: 2.3rem;
  letter-spacing: 0.05em;
  color: var(--primary-color);
}

.header-subtitle {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  letter-spacing: 0.3em;
  margin-top: 5px;
  color: var(--accent-color);
  font-size: 0.9rem;
}

/* ========== レスポンシブ（タブレット） ========== */
@media screen and (max-width: 1024px) {
  .calendar-preview {
    width: 95vw;
    max-width: 1120px;
    aspect-ratio: unset;
    height: auto;
  }
}

/* ========== レスポンシブ（スマホ） ========== */
@media screen and (max-width: 768px) {
  .app-layout {
    flex-direction: column;
    height: auto;
    overflow: visible;
  }

  .preview-area {
    padding: 10px;
    padding-top: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .calendar-preview {
    width: 1000px;
    min-width: 1000px;
    aspect-ratio: unset;
    height: auto;
    padding: 20px;
    margin: 0;
    border-radius: 8px;
  }

  header {
    margin-bottom: 16px;
    padding-bottom: 12px;
  }

  h1 { font-size: 1.8rem; }
  .header-subtitle { font-size: 0.8rem; }
}