:root {
  --bg: #1e1e2e;
  --card: #2a2a3e;
  --card-alt: #33334a;
  --accent: #7c6af7;
  --accent-hover: #6857e6;
  --text: #cdd6f4;
  --text-dim: #9399b2;
  --border: #3b3b54;

  --sev-low: #6c7086;
  --sev-medium: #f9e2af;
  --sev-high: #fab387;
  --sev-critical: #f38ba8;

  --cat-core: #89b4fa;
  --cat-module: #cba6f7;

  --success: #a6e3a1;
  --error: #f38ba8;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ---------- Header ---------- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 10px;
}

.page-header h1 {
  margin: 0;
  font-size: 1.4rem;
}

.nav-link {
  font-size: 0.85rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 8px;
  transition: all 0.15s ease;
}
.nav-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

/* ---------- Layout ---------- */
.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
}

.board-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 16px;
}

/* ---------- Form ---------- */
.card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.field .hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: normal;
  margin-left: 6px;
}

input[type="text"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
}

textarea {
  min-height: 80px;
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color 0.15s ease;
}

.radio-option:hover {
  border-color: var(--accent);
}

.radio-option input {
  accent-color: var(--accent);
}

.radio-option.selected {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.12);
}

/* ---------- File upload ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s ease;
}

.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.08);
  color: var(--text);
}

.dropzone input[type="file"] {
  display: none;
}

.thumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.thumb {
  position: relative;
  width: 70px;
  height: 70px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb .remove-thumb {
  position: absolute;
  top: 2px;
  right: 2px;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  font-size: 12px;
  line-height: 20px;
  text-align: center;
  cursor: pointer;
  padding: 0;
}

.thumb-count {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 6px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: background 0.15s ease;
}

.btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.btn.loading .spinner {
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Status messages ---------- */
.status-msg {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  display: none;
}

.status-msg.success {
  display: block;
  background: rgba(166, 227, 161, 0.12);
  color: var(--success);
  border: 1px solid var(--success);
}

.status-msg.error {
  display: block;
  background: rgba(243, 139, 168, 0.12);
  color: var(--error);
  border: 1px solid var(--error);
}

/* ---------- Kanban board ---------- */
.board-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-start;
  background: var(--card);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 18px;
}

.toolbar-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toolbar-group .toolbar-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toolbar-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.toolbar-options label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.85rem;
  cursor: pointer;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
}

.toolbar-options input {
  accent-color: var(--accent);
}

.search-group {
  flex: 1;
  min-width: 200px;
}

.search-group input {
  max-width: 320px;
}

.refresh-indicator {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: auto;
  align-self: center;
}

/* Columns */
.board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.column {
  background: var(--card);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.column-header {
  margin-bottom: 4px;
}

.column-header h2 {
  font-size: 1rem;
  margin: 0 0 4px 0;
}

.column-header .col-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.3;
  margin-bottom: 10px;
}

.column-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.empty-col {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
  padding: 16px 0;
  font-style: italic;
}

/* Bug card */
.bug-card {
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}

.bug-card .bug-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
  word-break: break-word;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border-radius: 5px;
  padding: 3px 8px;
  color: #1e1e2e;
}

.badge.cat-core { background: var(--cat-core); }
.badge.cat-module { background: var(--cat-module); }
.badge.sev-low { background: var(--sev-low); color: #fff; }
.badge.sev-medium { background: var(--sev-medium); }
.badge.sev-high { background: var(--sev-high); }
.badge.sev-critical { background: var(--sev-critical); }

.bug-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.bug-actions {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.bug-actions select {
  flex: 1;
  padding: 6px 8px;
  font-size: 0.8rem;
}

.icon-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  padding: 6px 10px;
  font-size: 0.85rem;
  transition: border-color 0.15s ease;
}

.icon-btn:hover {
  border-color: var(--accent);
}

.icon-btn.danger:hover {
  border-color: var(--error);
  color: var(--error);
}

/* Detail accordion */
.bug-detail {
  display: none;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

.bug-detail.open {
  display: block;
}

.bug-detail .detail-block {
  margin-bottom: 10px;
}

.bug-detail .detail-block h4 {
  margin: 0 0 4px 0;
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.bug-detail .detail-block p {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.screenshot-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.screenshot-row img {
  max-height: 80px;
  border-radius: 6px;
  border: 1px solid var(--border);
  cursor: pointer;
  object-fit: cover;
}

/* ---------- Lightbox ---------- */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 6px;
}

.lightbox .lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

.lightbox .lightbox-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  color: #fff;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px 16px;
  user-select: none;
}

.lightbox .lightbox-prev { left: 10px; }
.lightbox .lightbox-next { right: 10px; }

.lightbox .lightbox-counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 0.9rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .board {
    grid-template-columns: 1fr;
  }

  .column {
    min-height: unset;
  }

  .column-cards {
    display: none;
  }

  .column.expanded .column-cards {
    display: flex;
  }

  .column-header {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .column-header .col-toggle {
    font-size: 0.9rem;
    color: var(--text-dim);
  }
}

@media (max-width: 600px) {
  .page-header h1 {
    font-size: 1.1rem;
  }

  .board-toolbar {
    flex-direction: column;
  }

  .refresh-indicator {
    margin-left: 0;
  }
}