/* ===== Theme: green, compact, clean ===== */
:root {
  --green-50:  #f0f9f4;
  --green-100: #dcf2e3;
  --green-200: #b8e2c5;
  --green-300: #85cba1;
  --green-400: #4eaf79;
  --green-500: #2f945b;
  --green-600: #20794a;
  --green-700: #1a5e3b;
  --green-800: #144930;

  --bg:        #f5f8f6;
  --surface:   #ffffff;
  --border:    #e3ebe6;
  --text:      #1f2a24;
  --text-dim:  #6b7a72;
  --danger:    #d4453a;
  --warning:   #e89923;
  --shadow:    0 1px 3px rgba(32, 121, 74, 0.06);
  --shadow-md: 0 2px 8px rgba(32, 121, 74, 0.1);

  --radius:    5px;
  --topbar-h:  44px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted  { color: var(--text-dim); font-size: 12px; }

/* ===== Login overlay ===== */
.overlay {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, var(--green-100), var(--green-300));
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.login-card {
  background: var(--surface);
  padding: 36px 32px 28px;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(26, 94, 59, 0.2);
  width: 320px;
  text-align: center;
}
.login-logo { font-size: 48px; margin-bottom: 8px; }
.login-card h2 { margin: 0 0 4px; color: var(--green-700); }
.login-tip { margin: 0 0 16px; color: var(--text-dim); font-size: 13px; }
.login-card input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 14px; outline: none; margin-bottom: 12px;
}
.login-card input:focus { border-color: var(--green-400); }
.login-card .btn { width: 100%; }
.error-msg { color: var(--danger); font-size: 12px; min-height: 16px; margin: 8px 0 0; }

/* ===== Top bar ===== */
.topbar {
  height: var(--topbar-h);
  background: var(--green-600);
  color: #fff;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px;
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 50;
  gap: 12px;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 6px; }
.logo {
  font-weight: 600; font-size: 14px; letter-spacing: 0.3px;
  white-space: nowrap; padding: 0 4px;
}
#search-input {
  margin-left: 10px;
  width: 320px;
  padding: 5px 10px;
  border: none; border-radius: var(--radius);
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-size: 12px;
  outline: none;
}
#search-input::placeholder { color: rgba(255,255,255,0.7); }
#search-input:focus { background: rgba(255,255,255,0.28); }

/* Mode indicator */
.mode-indicator {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 10px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  white-space: nowrap;
}
body.mode-use .mode-indicator {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
body.mode-edit .mode-indicator {
  background: var(--warning);
  color: #fff;
  border-color: var(--warning);
  font-weight: 500;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 5px 10px;
  font-size: 12px;
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.12s;
  font-family: inherit;
  white-space: nowrap;
}
.btn:hover { background: rgba(255,255,255,0.22); }
.btn-primary {
  background: var(--green-500); color: #fff; border-color: var(--green-500);
}
.btn-primary:hover { background: var(--green-400); border-color: var(--green-400); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b7382f; border-color: #b7382f; }
.btn-ghost {
  background: transparent; color: var(--text-dim); border-color: var(--border);
}
.btn-ghost:hover { background: var(--green-50); color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.icon-btn {
  width: 20px; height: 20px;
  border: none; background: transparent;
  color: var(--text-dim);
  font-size: 12px; line-height: 1;
  cursor: pointer; border-radius: 4px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all 0.1s;
}
.icon-btn:hover { background: var(--green-100); color: var(--green-700); }
.icon-btn.danger:hover { background: #fde8e6; color: var(--danger); }

/* ===== Mode separation ===== */
/* Hide edit-only elements in use mode */
body.mode-use .edit-only { display: none !important; }
body.mode-use .card-checkbox { display: none !important; }
body.mode-use .card-actions { display: none !important; }
body.mode-use .section-actions .edit-only { display: none !important; }
body.mode-use .batch-bar { display: none !important; }

/* Edit mode: card click should select instead of open link */
body.mode-edit .card { cursor: default; }

/* In edit mode show a subtle border ring so user knows it's editable */
body.mode-edit .section {
  border-color: var(--green-200);
}

/* ===== Floating batch bar ===== */
.batch-bar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--green-800);
  color: #fff;
  padding: 6px 10px;
  border-radius: 22px;
  display: flex; align-items: center; gap: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  z-index: 100;
  font-size: 12px;
}
.batch-bar #batch-info { padding: 0 8px; font-weight: 500; }
.batch-bar .btn {
  padding: 4px 10px;
  font-size: 11px;
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.2);
}
.batch-bar .btn-primary { background: var(--green-500); border-color: var(--green-500); }
.batch-bar .btn-danger { background: var(--danger); border-color: var(--danger); }
.batch-bar .btn-ghost { background: transparent; border-color: transparent; color: rgba(255,255,255,0.7); }
.batch-bar .btn-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }

/* ===== Sections layout (compact) ===== */
.sections {
  max-width: 1300px;
  margin: 0 auto;
  padding: 16px;
  display: flex; flex-direction: column;
  gap: 10px;
}

.section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 5px 10px;
  background: var(--green-50);
  border-bottom: 1px solid var(--border);
  user-select: none;
  min-height: 30px;
}
.section-title {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--green-800);
}
.section-count {
  font-size: 10px;
  color: var(--text-dim);
  background: var(--surface);
  padding: 0 6px;
  border-radius: 8px;
  font-weight: 500;
  line-height: 16px;
}
.section-actions {
  display: flex; align-items: center; gap: 2px;
}
.section-add-btn {
  background: var(--green-500); color: #fff; border: none;
  padding: 2px 8px; border-radius: 3px; font-size: 11px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 3px;
  line-height: 18px;
}
.section-add-btn:hover { background: var(--green-600); }

/* ===== 5-column grid ===== */
.section-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 12px;
}

/* ===== Bookmark card (compact) ===== */
.card {
  position: relative;
  display: flex; align-items: center; gap: 6px;
  padding: 6px 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.12s;
  min-width: 0;
  text-decoration: none;
  color: var(--text);
  min-height: 36px;
}
.card:hover {
  border-color: var(--green-300);
  background: var(--green-50);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.card.selected {
  background: var(--green-50);
  border-color: var(--green-500);
  box-shadow: 0 0 0 1px var(--green-500);
}
.card.dragging { opacity: 0.5; }
.card.drop-target { border-color: var(--green-500); box-shadow: 0 0 0 2px var(--green-200); }

.card-checkbox {
  flex-shrink: 0;
  margin: 0;
  width: 13px; height: 13px;
  cursor: pointer;
  accent-color: var(--green-500);
  opacity: 0;
  transition: opacity 0.1s;
}
body.mode-edit .card-checkbox { opacity: 0.6; }
.card.selected .card-checkbox,
.card:hover .card-checkbox { opacity: 1; }
.card-checkbox:checked { opacity: 1; }

.card-favicon {
  flex-shrink: 0;
  width: 16px; height: 16px;
  border-radius: 2px;
  background: var(--green-100);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px;
  color: var(--green-600);
  object-fit: contain;
}
.card-body {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
  gap: 0;
  overflow: hidden;
}
.card-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--green-700);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  line-height: 1.3;
}
.card:hover .card-title { color: var(--green-600); }
.card-url {
  font-size: 10px;
  color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  line-height: 1.3;
}
.card-actions {
  position: absolute;
  top: 4px; right: 4px;
  display: none;
  gap: 2px;
  background: rgba(255,255,255,0.95);
  padding: 2px;
  border-radius: 3px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.card:hover .card-actions { display: flex; }

.empty-grid {
  grid-column: 1 / -1;
  text-align: center;
  padding: 20px 16px;
  color: var(--text-dim);
  font-size: 12px;
}
.empty-grid .icon { font-size: 28px; margin-bottom: 6px; opacity: 0.4; }

/* Hide cards filtered by search */
.card.hidden-by-search { display: none; }
.section.hidden-by-search { display: none; }

/* Highlight search match */
.card mark {
  background: var(--green-200);
  color: var(--green-800);
  padding: 0 1px;
  border-radius: 2px;
}

/* ===== Modal ===== */
.modal {
  position: fixed; inset: 0;
  background: rgba(20, 73, 48, 0.35);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  backdrop-filter: blur(2px);
}
.modal-card {
  background: var(--surface);
  border-radius: 10px;
  padding: 20px 22px;
  width: 380px;
  max-width: 90vw;
  box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}
.modal-card h3 {
  margin: 0 0 12px;
  color: var(--green-700);
  font-size: 15px;
}
.modal-card label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.modal-card input, .modal-card select, .modal-card textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  background: #fff;
  color: var(--text);
}
.modal-card input:focus, .modal-card select:focus, .modal-card textarea:focus {
  border-color: var(--green-400);
}
.modal-actions {
  display: flex; justify-content: flex-end; gap: 8px;
  margin-top: 16px;
}
.modal-actions .btn-primary { color: #fff; }

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--green-700);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s;
  z-index: 500;
  transform: translateY(20px);
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }

/* ===== Mode hint toast (transient) ===== */
.mode-hint {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: var(--green-800);
  color: #fff;
  padding: 6px 16px;
  border-radius: 16px;
  font-size: 12px;
  z-index: 150;
  opacity: 0;
  transition: all 0.2s;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.mode-hint.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-200); }

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .section-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 900px) {
  .section-grid { grid-template-columns: repeat(3, 1fr); }
  #search-input { width: 200px; }
}
@media (max-width: 640px) {
  .section-grid { grid-template-columns: repeat(2, 1fr); }
  .topbar { flex-wrap: wrap; height: auto; padding: 6px 8px; gap: 4px; }
  #search-input { width: 100%; margin-left: 0; margin-top: 4px; }
  .topbar-left, .topbar-right { flex-wrap: wrap; }
  .sections { padding: 10px; }
  .card { padding: 6px; }
  .card-url { display: none; }
  .mode-indicator { font-size: 10px; padding: 2px 6px; }
  .topbar-right .btn { padding: 4px 6px; font-size: 11px; }
}