/* ═══════════════════════════════════════════════════════════════════════════
   KanFlow — Gradient-v1 Design (pale violet → pale blue)
   ═══════════════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700&display=swap');

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

:root {
  /* Gradient palette */
  --c1: #d9ccf5;
  --c2: #c9bff0;
  --c3: #c0bce8;
  --c4: #b8cef0;
  --c5: #a3c4ed;
  --c6: #b0c8f0;
  --c7: #c8bff2;
  --c8: #dccff5;
  --gradient-angle: 145deg;
  --bg-w: 300%;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.50);
  --glass-border-strong: rgba(255, 255, 255, 0.65);
  --glass-shadow: rgba(80, 60, 120, 0.08);

  /* Accent */
  --primary: #005a87;
  --primary-dark: #004a6e;
  --accent-subtle: rgba(0, 90, 135, 0.07);

  /* Text */
  --text: #1e1b2e;
  --text-secondary: #5c5470;
  --text-tertiary: #8a82a0;

  /* Semantic */
  --danger: #dc2626;
  --danger-bg: rgba(220, 38, 38, 0.10);
  --success: #16a34a;
  --success-bg: rgba(22, 163, 74, 0.10);
  --yellow: #d97706;

  /* Geometry */
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --shadow: 0 1px 3px var(--glass-shadow), 0 4px 12px rgba(80, 60, 120, 0.04);
  --shadow-lg: 0 2px 6px var(--glass-shadow), 0 8px 24px rgba(80, 60, 120, 0.06);

  font-feature-settings: 'cv01', 'ss03', 'calt';
}

/* ─── Animated Gradient Background ──────────────────────────────────── */
@keyframes gradient-drift {
  0%   { background-position: 0% 50%; }
  25%  { background-position: 50% 30%; }
  50%  { background-position: 100% 50%; }
  75%  { background-position: 50% 70%; }
  100% { background-position: 0% 50%; }
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  background:
    linear-gradient(145deg,
      var(--c1) 0%, var(--c2) 12%, var(--c3) 25%, var(--c4) 37%,
      var(--c5) 50%, var(--c6) 62%, var(--c7) 75%, var(--c8) 87%, var(--c1) 100%);
  background-size: var(--bg-w) 100%;
  animation: gradient-drift 24s ease-in-out infinite;
  position: relative;
}

/* Noise texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.03;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

/* ─── Auth Page ──────────────────────────────────────────────────────── */
.auth-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 20px;
  position: relative; z-index: 1;
}

.auth-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xl);
  padding: 40px; width: 100%; max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.auth-card h1 { font-size: 28px; color: var(--primary); margin-bottom: 4px; }
.auth-card p { color: var(--text-secondary); margin-bottom: 24px; font-size: 14px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }

.form-group input, .form-group select {
  width: 100%; padding: 10px 12px;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius);
  font-size: 14px; font-family: inherit;
  transition: all 0.2s;
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,90,135,0.15);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius); font-size: 14px; font-weight: 600;
  border: none; cursor: pointer; transition: all 0.2s; text-decoration: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--primary); color: white;
  box-shadow: 0 2px 8px rgba(0, 90, 135, 0.2);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: var(--glass-bg-strong); color: var(--text);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: var(--glass-bg); border-color: var(--glass-border-strong);
}
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-icon {
  padding: 8px; background: transparent; border-radius: 50%;
  color: var(--text-tertiary); border: none; cursor: pointer; font-size: 16px;
}
.btn-icon:hover { background: var(--accent-subtle); color: var(--primary); }
.btn-block { width: 100%; }

.auth-link { text-align: center; margin-top: 16px; font-size: 13px; color: var(--text-secondary); }
.auth-link a { color: var(--primary); cursor: pointer; text-decoration: none; font-weight: 600; }
.auth-link a:hover { text-decoration: underline; }

.error-msg {
  background: var(--danger-bg); color: var(--danger);
  padding: 10px; border-radius: var(--radius); font-size: 13px; margin-bottom: 16px; display: none;
}

/* ─── App Layout ──────────────────────────────────────────────────────── */
.app-layout {
  display: flex; flex-direction: column; height: 100vh;
  position: relative; z-index: 1;
}

.app-header {
  display: flex; align-items: center; height: 56px; gap: 16px;
  padding: 0 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--glass-border);
}
.app-header h1 { font-size: 20px; flex: 1; cursor: pointer; color: var(--primary); font-weight: 700; letter-spacing: -0.02em; }
.app-header .user-info { font-size: 13px; color: var(--text-secondary); }
.app-header .logout-btn {
  cursor: pointer; font-size: 13px; font-weight: 500;
  padding: 6px 14px; border-radius: 20px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg-strong); color: var(--text-secondary);
  font-family: inherit;
}
.app-header .logout-btn:hover {
  background: var(--glass-bg); color: var(--text);
}

.app-content {
  flex: 1; overflow: auto; padding: 20px 24px;
}

/* ─── Board List ──────────────────────────────────────────────────────── */
.board-list-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px;
}
.board-list-header h2 { font-size: 22px; color: var(--text); font-weight: 600; }

.board-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.board-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  cursor: pointer; transition: all 0.15s ease;
}
.board-card:hover {
  border-color: var(--glass-border-strong);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.board-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.board-card p { color: var(--text-secondary); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.board-card .board-meta { margin-top: 12px; font-size: 12px; color: var(--text-tertiary); }

.board-card.create-card {
  border: 2px dashed var(--glass-border-strong);
  background: transparent; backdrop-filter: none;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); font-size: 15px; cursor: pointer;
}
.board-card.create-card:hover { border-color: var(--primary); color: var(--primary); }
.board-card.create-card .plus { font-size: 32px; margin-bottom: 8px; }

/* ─── Board View ──────────────────────────────────────────────────────── */
.board-view { display: flex; flex-direction: column; height: 100%; }

.board-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px; gap: 12px; flex-wrap: wrap;
}
.board-toolbar h2 { font-size: 22px; font-weight: 600; color: var(--text); }
.board-toolbar-actions { display: flex; gap: 8px; align-items: center; }

.kanban-container {
  display: flex; gap: 16px; overflow-x: auto; flex: 1;
  padding-bottom: 20px; align-items: flex-start;
}

.kanban-column {
  background: var(--glass-bg);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  min-width: 300px; max-width: 340px; width: 300px;
  display: flex; flex-direction: column;
  max-height: calc(100vh - 140px);
}

.column-header {
  padding: 14px 16px; font-weight: 600; font-size: 14px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text);
  border-bottom: 1px solid var(--glass-border);
}
.column-header .card-count {
  background: rgba(0,0,0,0.06);
  padding: 2px 10px; border-radius: 12px;
  font-size: 12px; color: var(--text-tertiary);
}
.column-header-actions { display: flex; gap: 4px; }

.column-cards {
  flex: 1; overflow-y: auto; padding: 8px;
  display: flex; flex-direction: column; gap: 8px;
  min-height: 60px;
}

/* ─── Search Box ──────────────────────────────────────────────────────── */
.search-box { position: relative; display: flex; align-items: center; max-width: 300px; flex: 1; }
.search-box input {
  width: 100%; padding: 6px 30px 6px 12px;
  border: 1px solid var(--glass-border);
  border-radius: 20px; font-size: 13px;
  background: var(--glass-bg-strong);
  outline: none; transition: all 0.2s;
  font-family: inherit;
}
.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,90,135,0.15);
}
.search-clear {
  position: absolute; right: 8px; cursor: pointer;
  color: var(--text-secondary); font-size: 14px;
  padding: 2px 4px; border-radius: 50%; display: none;
}
.search-box input:not(:placeholder-shown) ~ .search-clear { display: block; }
.search-clear:hover { color: var(--text); background: rgba(0,0,0,0.06); }

/* ─── Search Results ──────────────────────────────────────────────────── */
.search-empty {
  display: flex; align-items: center; justify-content: center;
  width: 100%; padding: 60px 20px;
  color: var(--text-secondary); font-size: 15px;
}
.search-results { width: 100%; }
.search-results-header { padding: 0 0 16px; font-size: 14px; color: var(--text-secondary); }
.search-results-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px;
}
.search-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 14px; box-shadow: var(--shadow);
  cursor: pointer; transition: all 0.15s;
}
.search-card:hover { border-color: var(--glass-border-strong); box-shadow: var(--shadow-lg); }

/* ─── Priority Dot ───────────────────────────────────────────────────── */
.priority-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ─── Blocked Banner ─────────────────────────────────────────────────── */
.kanban-card.is-blocked { border-left: 3px solid var(--danger); }
.blocked-banner {
  background: var(--danger-bg); color: var(--danger);
  padding: 4px 8px; border-radius: 4px; font-size: 11px; margin-bottom: 6px; line-height: 1.3;
}

/* ─── Assignee Badge ─────────────────────────────────────────────────── */
.assignee-badge {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 11px; color: var(--text-secondary);
  padding: 2px 6px; background: rgba(0,0,0,0.04); border-radius: 4px; margin-bottom: 4px;
}

/* ─── WIP Limit ──────────────────────────────────────────────────────── */
.wip-limit {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 12px;
  font-size: 12px; font-weight: 600;
  background: rgba(0, 90, 135, 0.08); color: var(--primary);
}
.wip-limit.wip-over { background: var(--danger-bg); color: var(--danger); animation: pulse-red 1s ease infinite; }
@keyframes pulse-red { 0%,100% { opacity: 1; } 50% { opacity: 0.7; } }
.kanban-column.wip-over { border-color: var(--danger); box-shadow: 0 0 0 1px var(--danger); }

/* ─── Archived Badge ─────────────────────────────────────────────────── */
.archived-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; color: var(--text-secondary);
  padding: 2px 6px; background: rgba(0,0,0,0.04); border-radius: 4px; margin-top: 4px;
}
.kanban-card.archived { opacity: 0.65; }

/* ─── Toggle Switch ──────────────────────────────────────────────────── */
.toggle { position: relative; display: inline-block; width: 44px; height: 24px; cursor: pointer; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; background: rgba(0,0,0,0.15);
  border-radius: 24px; transition: all 0.2s;
}
.toggle-slider::before {
  content: ''; position: absolute; left: 3px; bottom: 3px;
  width: 18px; height: 18px; background: white; border-radius: 50%; transition: all 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }
.toggle input:disabled + .toggle-slider { opacity: 0.5; cursor: not-allowed; }

/* ─── Select ─────────────────────────────────────────────────────────── */
.form-group select { background: rgba(255,255,255,0.7); cursor: pointer; }
.form-group select:disabled { opacity: 0.5; cursor: not-allowed; }
select {
  font-family: inherit; font-size: 13px;
  padding: 8px 10px; border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius); background: rgba(255,255,255,0.7);
  transition: border-color 0.2s;
}
select:focus { outline: none; border-color: var(--primary); }

/* ─── Kanban Card ────────────────────────────────────────────────────── */
.kanban-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 12px; box-shadow: var(--shadow);
  cursor: grab; transition: all 0.15s;
  position: relative;
}
.kanban-card:hover {
  border-color: var(--glass-border-strong);
  box-shadow: var(--shadow-lg);
}
.kanban-card.dragging { opacity: 0.5; transform: rotate(3deg); }
.kanban-card .card-title { font-size: 14px; font-weight: 500; margin-bottom: 6px; word-break: break-word; color: var(--text); }

.card-labels { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.card-label {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 11px; font-weight: 500; color: white;
}

.card-meta { display: flex; gap: 12px; font-size: 11px; color: var(--text-tertiary); margin-top: 6px; }
.card-meta span { display: flex; align-items: center; gap: 3px; }

.drag-over {
  background: rgba(0, 90, 135, 0.06);
  border: 2px dashed var(--primary); min-height: 40px;
  border-radius: var(--radius-lg);
}
.drag-placeholder { height: 0; overflow: hidden; }

/* ─── Card ID ────────────────────────────────────────────────────────── */
.card-id {
  font-size: 10px; color: var(--text-tertiary);
  margin-top: 4px; font-family: monospace;
}

/* ─── Modal ──────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(30, 27, 46, 0.4);
  backdrop-filter: blur(4px);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 40px 20px; z-index: 1000; overflow-y: auto;
}

.modal {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xl);
  width: 100%; max-width: 600px;
  box-shadow: 0 8px 32px rgba(80, 60, 120, 0.12);
  margin-top: 20px;
}

.modal-header {
  padding: 20px 24px 0;
  display: flex; justify-content: space-between; align-items: flex-start;
}
.modal-header h3 { font-size: 18px; flex: 1; color: var(--text); font-weight: 600; }

.modal-body { padding: 16px 24px 24px; }

.modal-section { margin-bottom: 20px; }
.modal-section-title {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-tertiary); margin-bottom: 8px;
}

.modal textarea, .modal input[type="text"], .modal input[type="date"], .modal input[type="number"] {
  width: 100%; padding: 8px 10px;
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius); font-size: 14px; font-family: inherit;
  transition: border-color 0.2s;
}
.modal textarea:focus, .modal input:focus { outline: none; border-color: var(--primary); }
.modal textarea { min-height: 80px; resize: vertical; }

.label-selector { display: flex; flex-wrap: wrap; gap: 6px; }
.label-selector .label-chip {
  padding: 4px 10px; border-radius: 12px; font-size: 12px; cursor: pointer;
  opacity: 0.6; transition: all 0.2s; color: white;
}
.label-selector .label-chip.active { opacity: 1; }
.label-selector .label-chip:hover { opacity: 1; }

.comment-item {
  padding: 10px 0; border-bottom: 1px solid var(--glass-border);
  font-size: 14px;
}
.comment-item:last-child { border-bottom: none; }
.comment-item .comment-author { font-weight: 600; font-size: 12px; color: var(--primary); }
.comment-item .comment-time { font-size: 11px; color: var(--text-tertiary); margin-left: 8px; }
.comment-item .comment-text { margin-top: 4px; color: var(--text); }

.modal-footer {
  padding: 16px 24px; border-top: 1px solid var(--glass-border);
  display: flex; justify-content: flex-end; gap: 8px;
}

/* ─── Create Board Modal ──────────────────────────────────────────────── */
.create-board-modal .modal { max-width: 420px; }

/* ─── Add List ────────────────────────────────────────────────────────── */
.add-list-column { min-width: 300px; max-width: 340px; width: 300px; display: flex; align-items: flex-start; }
.add-list-btn {
  width: 100%; padding: 12px;
  background: rgba(255,255,255,0.2);
  border: 2px dashed var(--glass-border-strong);
  border-radius: var(--radius-xl);
  color: var(--text-secondary); font-size: 14px; cursor: pointer;
  text-align: center; transition: all 0.2s;
  backdrop-filter: blur(8px);
}
.add-list-btn:hover { border-color: var(--primary); color: var(--primary); }

.add-card-btn {
  padding: 8px; text-align: center; cursor: pointer;
  border-radius: var(--radius);
  color: var(--text-secondary); font-size: 13px; transition: all 0.15s; margin-top: 4px;
}
.add-card-btn:hover { background: rgba(0,0,0,0.04); color: var(--primary); }
.add-card-btn span { display: flex; align-items: center; justify-content: center; gap: 4px; }

/* ─── Toast ───────────────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--glass-bg-strong);
  backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid var(--glass-border-strong);
  color: var(--text); padding: 12px 20px;
  border-radius: var(--radius-lg); font-size: 14px;
  box-shadow: var(--shadow-lg);
  z-index: 2000; animation: toast-in 0.3s ease;
}
@keyframes toast-in { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ─── Checklist ──────────────────────────────────────────────────────── */
.checklist-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 0; border-bottom: 1px solid var(--glass-border);
}
.checklist-item:last-child { border-bottom: none; }
.checklist-toggle {
  position: relative; display: flex; align-items: center;
  cursor: pointer; width: 18px; height: 18px; flex-shrink: 0;
}
.checklist-toggle input { position: absolute; opacity: 0; cursor: pointer; }
.checkmark {
  width: 18px; height: 18px; border-radius: 3px;
  border: 2px solid var(--text-tertiary); background: rgba(255,255,255,0.7);
  transition: all 0.15s;
}
.checklist-toggle input:checked + .checkmark {
  background: var(--primary); border-color: var(--primary);
}
.checklist-toggle input:checked + .checkmark::after {
  content: '✓'; display: block; text-align: center;
  color: #fff; font-size: 13px; line-height: 15px; font-weight: bold;
}
.checklist-title.done { text-decoration: line-through; color: var(--text-tertiary); }

/* ─── Dependencies ──────────────────────────────────────────────────── */
.dep-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 0; font-size: 13px;
  border-bottom: 1px solid var(--glass-border);
}
.dep-item:last-child { border-bottom: none; }

/* ─── Attachments ────────────────────────────────────────────────────── */
.att-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 0; font-size: 13px;
  border-bottom: 1px solid var(--glass-border);
}
.att-item:last-child { border-bottom: none; }
.att-size { color: var(--text-tertiary); font-size: 11px; }

/* ─── Scrollbar ───────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border-strong); border-radius: 3px; }

/* ─── Column Delete Button ───────────────────────────────────────────── */
.btn-sm.column-delete {
  font-size: 10px; padding: 2px 6px; border-radius: 4px;
  background: transparent; color: var(--text-tertiary); border: none; cursor: pointer;
}
.btn-sm.column-delete:hover { background: var(--danger-bg); color: var(--danger); }

/* ─── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .kanban-column { min-width: 260px; max-width: 280px; width: 260px; }
  .app-content { padding: 12px; }
  .board-grid { grid-template-columns: 1fr; }
}