/* HCBS Online Library — styles */

/* ---- Design Tokens ---- */

:root {
  --color-primary: #2b2b2b;
  --color-primary-hover: #444;
  --color-text: #1a1a1a;
  --color-text-muted: #444;
  --color-text-light: #666;
  --color-text-faint: #999;
  --color-bg: #f7f7f5;
  --color-card: #fff;
  --color-card-hover: #fff;
  --color-border: #e3e3e0;
  --color-input-border: #ccc;
  --color-header-bg: #2b2b2b;
  --color-header-text: #f5f5f5;
  --color-header-sub: #bbb;
  --color-snippet-bg: #fafaf7;
  --color-highlight: #ffe066;
  --color-pill-bg: #f0f0ed;
  --color-pill-text: #666;
  --color-tab-border: #ddd;
  --color-focus-ring: rgba(43,43,43,0.15);
  --color-shadow: rgba(0,0,0,0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-pill: 999px;
}

/* ---- Dark Mode (JS sets data-theme attribute) ---- */

[data-theme="dark"] {
  --color-primary: #e0e0e0;
  --color-primary-hover: #ccc;
  --color-text: #e5e5e5;
  --color-text-muted: #aaa;
  --color-text-light: #999;
  --color-text-faint: #777;
  --color-bg: #1a1a1a;
  --color-card: #262626;
  --color-card-hover: #2e2e2e;
  --color-border: #3a3a3a;
  --color-input-border: #555;
  --color-header-bg: #111;
  --color-header-text: #e5e5e5;
  --color-header-sub: #888;
  --color-snippet-bg: #2a2a28;
  --color-highlight: #a68500;
  --color-pill-bg: #333;
  --color-pill-text: #aaa;
  --color-tab-border: #444;
  --color-focus-ring: rgba(200,200,200,0.2);
  --color-shadow: rgba(0,0,0,0.3);
}

.hidden { display: none !important; }
* { box-sizing: border-box; }

body {
  font-family: -apple-system, "Helvetica Neue", "Apple SD Gothic Neo",
               "Noto Sans KR", sans-serif;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* ---- Skip Link (accessibility) ---- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-header-text);
  padding: 0.5rem 1rem;
  z-index: 1000;
  font-size: 0.9rem;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
}

/* ---- Header ---- */

header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.5rem 2rem 1rem;
  background: var(--color-header-bg);
  color: var(--color-header-text);
}
header h1 { margin: 0; font-size: 1.4rem; }
header .sub { margin: 0.25rem 0 0; color: var(--color-header-sub); font-size: 0.85rem; }

.theme-toggle {
  background: none;
  border: 1px solid var(--color-header-sub);
  color: var(--color-header-text);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.6rem;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  min-height: 32px;
  transition: opacity 0.15s;
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.theme-toggle:hover { opacity: 0.7; }

/* ---- Main ---- */

main { max-width: 980px; margin: 0 auto; padding: 1.5rem; }

/* ---- Notice ---- */

.notice {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  margin-bottom: 1rem;
  border-left: 3px solid var(--color-text-faint);
  background: var(--color-snippet-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.notice-icon {
  flex-shrink: 0;
  font-size: 0.9rem;
  line-height: 1.5;
}
.notice p {
  margin: 0;
}

/* ---- Mode Tabs ---- */

.mode-tabs {
  display: flex; gap: 0;
  margin-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-tab-border);
}
.mode-tab {
  background: none; border: 0;
  border-bottom: 2px solid transparent;
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  cursor: pointer; color: var(--color-text-light);
  min-height: 44px;
  transition: color 0.15s, border-color 0.15s;
}
.mode-tab.active {
  color: var(--color-text);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}
.mode-tab:hover:not(.active) { color: var(--color-text); }
.mode-tab.disabled {
  color: var(--color-text-faint);
  cursor: default;
  opacity: 0.6;
}
.mode-tab.disabled:hover { color: var(--color-text-faint); }

/* ---- Search Bar ---- */

.search-bar { display: flex; gap: 0.5rem; }
.ac-wrapper { position: relative; flex: 1; }
.search-bar input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1rem;
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  color: var(--color-text);
  min-height: 44px;
}
.search-bar input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-focus-ring);
}

/* ---- Autocomplete Dropdown ---- */

.ac-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin: 0;
  padding: 0.25rem 0;
  list-style: none;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 4px 12px var(--color-shadow);
  z-index: 100;
  max-height: 360px;
  overflow-y: auto;
}
.ac-item {
  display: flex;
  align-items: baseline;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text);
  gap: 0.5rem;
}
.ac-item:hover, .ac-active {
  background: var(--color-card-hover);
}
.ac-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ac-title mark {
  background: var(--color-highlight);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}
.ac-meta {
  color: var(--color-text-faint);
  font-size: 0.78rem;
  flex-shrink: 0;
  white-space: nowrap;
}
.ac-field {
  color: var(--color-text-faint);
  font-size: 0.72rem;
  flex-shrink: 0;
  opacity: 0.7;
}
.search-bar button {
  padding: 0 1.2rem;
  font-size: 1rem;
  border: 0;
  background: var(--color-header-bg);
  color: var(--color-header-text);
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: 44px;
  transition: opacity 0.15s;
}
.search-bar button:hover { opacity: 0.85; }

/* ---- Filters ---- */

.filters {
  display: flex; gap: 1rem; flex-wrap: wrap;
  margin: 0.6rem 0; font-size: 0.9rem; color: var(--color-text-muted);
}
.filters label { display: flex; align-items: center; gap: 0.4rem; white-space: nowrap; }
.filters select {
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background: var(--color-card);
  color: var(--color-text);
  min-height: 36px;
}

/* ---- Status ---- */

.status {
  margin: 0.8rem 0 1rem;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  min-height: 1.5em;
}
.status a { color: var(--color-primary); font-weight: 500; }
.status-hint { font-size: 0.8rem; color: var(--color-text-faint); }

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--color-tab-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 0.3rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Results ---- */

.results { display: flex; flex-direction: column; gap: 0.5rem; }

/* ---- Card ---- */

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  transition: box-shadow 0.15s, background 0.15s;
}
.card:hover {
  background: var(--color-card-hover);
  box-shadow: 0 2px 8px var(--color-shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}
.card-title {
  font-size: 1.02rem;
  font-weight: 600;
  margin: 0;
  flex: 1;
  line-height: 1.4;
}
.card-year {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
  padding-top: 0.1rem;
}

.card-authors {
  font-size: 0.88rem;
  color: var(--color-text);
  margin-top: 0.15rem;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.3rem;
  gap: 0.5rem;
}
.card-journal {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-style: italic;
  flex: 1;
}

/* Keywords */
.card-keywords {
  margin-top: 0.3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.kw-pill {
  display: inline-block;
  font-size: 0.7rem;
  background: var(--color-pill-bg);
  color: var(--color-pill-text);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-pill);
}

/* Actions */
.card-actions {
  margin-top: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.card-buttons {
  display: flex;
  gap: 0.5rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  font-size: 0.82rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid var(--color-header-bg);
  background: var(--color-header-bg);
  color: var(--color-header-text);
  min-height: 36px;
  transition: all 0.15s;
  cursor: pointer;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.no-drive { font-size: 0.78rem; color: var(--color-text-faint); }
.card-size {
  font-size: 0.75rem;
  color: var(--color-text-faint);
}

/* ---- Footer ---- */

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-text-faint);
  font-size: 0.75rem;
}

/* ---- Mobile Responsive ---- */

@media (max-width: 640px) {
  header { padding: 1rem 1rem 0.8rem; }
  header h1 { font-size: 1.2rem; }

  main { padding: 1rem; }

  .mode-tabs { gap: 0; }
  .mode-tab {
    flex: 1;
    text-align: center;
    padding: 0.5rem 0.5rem;
    font-size: 0.88rem;
  }

  .search-bar {
    flex-direction: column;
  }
  .search-bar input {
    width: 100%;
    font-size: 16px; /* prevent iOS zoom */
  }
  .search-bar button {
    width: 100%;
    padding: 0.6rem;
  }

  .filters select {
    width: 100%;
  }

  .card { padding: 0.7rem 0.8rem; }

  .card-header {
    flex-direction: column;
    gap: 0.15rem;
  }
  .card-year {
    font-size: 0.78rem;
  }

  .card-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }

  .card-actions {
    flex-direction: column;
    gap: 0.4rem;
    align-items: stretch;
  }
  .card-buttons {
    flex-direction: column;
    gap: 0.4rem;
  }
  .btn-primary {
    justify-content: center;
    min-height: 44px;
    width: 100%;
  }
  .card-size {
    text-align: right;
  }
}