:root {
  --bg: #0e1116;
  --surface: #161b22;
  --surface-2: #1c232c;
  --border: #262d38;
  --border-strong: #333c49;
  --text: #e6edf3;
  --text-dim: #8b97a6;
  --accent: #4c8dff;
  --accent-dim: #2f5fb0;
  --danger: #e5534b;
  --radius: 10px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

/* ---------- Gate ---------- */

.gate {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

.gate-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.gate-title {
  margin: 0 0 6px;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.gate-note {
  margin: 0 0 20px;
  color: var(--text-dim);
  font-size: 13px;
}

.gate-error {
  margin: 14px 0 0;
  color: var(--danger);
  font-size: 13px;
}

.gate-fine {
  margin: 18px 0 0;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.5;
}

.field {
  display: block;
  margin-bottom: 14px;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--text-dim);
}

input[type="password"],
input[type="text"],
input[type="search"],
textarea {
  width: 100%;
  padding: 9px 11px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(76, 141, 255, 0.16);
}

/* ---------- Buttons ---------- */

.btn {
  padding: 8px 13px;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.14s ease, border-color 0.14s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: #5f9bff;
}

.btn-primary:disabled {
  background: var(--accent-dim);
  cursor: progress;
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-dim);
}

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

.btn-danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}

.btn-danger:hover {
  background: rgba(229, 83, 75, 0.12);
}

.btn-block {
  width: 100%;
  margin-top: 4px;
}

/* ---------- Top bar ---------- */

.app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.save-state {
  font-size: 12px;
  color: var(--text-dim);
}

.save-state[data-state="saving"] {
  color: var(--accent);
}

.save-state[data-state="error"] {
  color: var(--danger);
}

.search {
  width: 190px;
}

/* ---------- Columns ---------- */

.columns {
  flex: 1;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  overflow-x: auto;
}

.column {
  flex: 0 0 290px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  max-height: 100%;
}

.column.drag-over {
  border-color: var(--accent);
  background: var(--surface-2);
}

.column-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
}

.column-title {
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  padding: 3px 6px;
}

.column-title:hover {
  border-color: var(--border-strong);
}

.column-count {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 18px;
  text-align: right;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  padding: 3px 5px;
  border-radius: 6px;
}

.icon-btn:hover {
  color: var(--danger);
  background: rgba(229, 83, 75, 0.1);
}

.cards {
  list-style: none;
  margin: 0;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  min-height: 46px;
}

.card {
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 10px 11px;
  cursor: grab;
}

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

.card.dragging {
  opacity: 0.45;
}

.card-title {
  font-size: 14px;
  word-break: break-word;
}

.card-notes {
  margin-top: 5px;
  font-size: 12px;
  color: var(--text-dim);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.column-add {
  margin: 0 10px 10px;
  padding: 8px;
  background: transparent;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  color: var(--text-dim);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.column-add:hover {
  color: var(--text);
  border-color: var(--accent);
}

.empty-hint {
  color: var(--text-dim);
  font-size: 13px;
  padding: 20px;
}

/* ---------- Dialog ---------- */

.dialog {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 0;
  width: min(480px, 92vw);
  box-shadow: var(--shadow);
}

.dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

.dialog-form {
  padding: 22px;
}

.dialog-title {
  margin: 0 0 16px;
  font-size: 17px;
}

.dialog-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}

.spacer {
  flex: 1;
}

@media (max-width: 620px) {
  .search {
    width: 130px;
  }
  .column {
    flex-basis: 84vw;
  }
}