:root {
  --bg: #faf6f0;
  --bg-card: #fffef9;
  --bg-filter: #fff8ec;
  --ink: #2c2416;
  --ink-muted: #6b5d4a;
  --accent: #c45c26;
  --accent-soft: #f3e0d2;
  --border: #e8dcc8;
  --shadow: 0 2px 12px rgba(44, 36, 22, 0.08);
  --radius: 14px;
  --font-display: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
  --font-body: "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse at top, #fff8ec 0%, transparent 60%),
    var(--bg);
  line-height: 1.6;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1rem 0.75rem;
}

.app-title {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.app-subtitle {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.search-box {
  position: relative;
  margin-bottom: 0.75rem;
}

.search-box input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-muted);
  pointer-events: none;
}

.filter-panel {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-bottom: 0.5rem;
}

.filter-row {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}

.filter-row::-webkit-scrollbar {
  display: none;
}

.filter-group {
  flex: 0 0 auto;
  min-width: 0;
}

.filter-group label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--ink-muted);
  margin-bottom: 0.2rem;
  letter-spacing: 0.06em;
}

.filter-group select {
  min-width: 5.5rem;
  padding: 0.45rem 1.8rem 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b5d4a' d='M6 8L1 3h10z'/%3E%3C/svg%3E") no-repeat right 0.5rem center;
  appearance: none;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--ink);
}

.filter-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.filter-buttons {
  display: flex;
  gap: 0.4rem;
}

.result-count {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.result-count strong {
  color: var(--accent);
  font-size: 1rem;
}

.btn-reset {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-card);
  font-family: inherit;
  font-size: 0.78rem;
  color: var(--ink-muted);
  cursor: pointer;
}

.btn-reset:active {
  background: var(--accent-soft);
}

.btn-import,
.btn-import-submit {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
}

.btn-import:active,
.btn-import-submit:active {
  opacity: 0.9;
}

.btn-import-submit {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
}

.btn-import-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.import-body {
  padding-top: 0.5rem;
}

.import-lead {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.import-field {
  display: block;
  margin-bottom: 0.85rem;
}

.import-label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-muted);
}

.import-field input[type="file"],
.import-field input[type="password"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--ink);
}

.import-status {
  min-height: 1.4rem;
  margin: 0.25rem 0 0.75rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.import-status.is-error {
  color: #b42318;
}

.import-status.is-success {
  color: #2f6b3a;
}

.main {
  padding: 0.75rem 1rem 5rem;
  max-width: 720px;
  margin: 0 auto;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.record-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1rem 0.85rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.record-card:active {
  transform: scale(0.985);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-grade {
  background: var(--accent);
  color: #fff;
}

.badge-class {
  background: var(--accent-soft);
  color: var(--accent);
}

.badge-month {
  background: #e8f0e4;
  color: #3d5c35;
}

.badge-format {
  background: #e8eef5;
  color: #3a4f6b;
}

.card-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.45;
}

.card-authors {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.card-publisher {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.card-recommend {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  color: var(--accent);
}

.card-has-notes {
  margin-top: 0.5rem;
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--ink-muted);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(44, 36, 22, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 720px;
  max-height: 90dvh;
  background: var(--bg-card);
  border-radius: 20px 20px 0 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-header {
  position: sticky;
  top: 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1rem 0.75rem;
  flex-shrink: 0;
}

.modal-handle {
  width: 36px;
  height: 4px;
  background: var(--border);
  border-radius: 999px;
  margin: 0 auto 0.75rem;
}

.modal-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 50%;
  background: var(--bg);
  font-size: 1.1rem;
  color: var(--ink-muted);
  cursor: pointer;
  line-height: 1;
}

.modal-title {
  margin: 0 2rem 0.5rem 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.45;
}

.modal-body {
  overflow-y: auto;
  padding: 0 1rem 2rem;
  -webkit-overflow-scrolling: touch;
}

.detail-section {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.detail-section h3 {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.detail-section p {
  margin: 0;
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.detail-grid {
  display: grid;
  gap: 0.5rem;
}

.detail-row {
  display: flex;
  gap: 0.5rem;
  font-size: 0.88rem;
}

.detail-label {
  flex: 0 0 4.5rem;
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.detail-value {
  flex: 1;
}

@media (min-width: 640px) {
  .modal-overlay {
    align-items: center;
    padding: 1rem;
  }

  .modal {
    border-radius: var(--radius);
    max-height: 85dvh;
  }

  .modal-handle {
    display: none;
  }

  .filter-panel {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-end;
  }

  .filter-row {
    flex-wrap: wrap;
    overflow: visible;
  }
}