/* ─── Variables ───────────────────────────────────────────────────── */
:root {
  --bg: #0b0b0f;
  --bg2: #1e1e2a;
  --bg3: #282838;
  --bg4: #32324400;
  --border: #32324a;
  --border2: #424260;
  --text: #eeeef6;
  --text2: #9090b0;
  --text3: #5a5a78;
  --accent: #7b68ee;
  --accent2: #5a4fd4;
  --danger: #e05c5c;
  --warn: #e0a020;
  --success: #56b87e;
  --font-display: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

/* ─── Reset / Base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.875rem;
  line-height: 1.6;
  min-height: 100vh;
}

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

button { font-family: inherit; cursor: pointer; }
input, select, textarea {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* ─── Topnav ──────────────────────────────────────────────────────── */
.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 56px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-actions { display: flex; gap: 0.5rem; align-items: center; }

.btn-nav {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.85rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: all 0.15s;
}
.btn-nav:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.btn-logout { background: transparent; border: 1px solid transparent; color: var(--text2); }
.btn-logout:hover { border-color: var(--danger); color: var(--danger); background: transparent; }

/* ─── Messages ────────────────────────────────────────────────────── */
.messages { padding: 0.75rem 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; }
.message {
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  background: var(--bg3);
  border-left: 3px solid var(--accent);
}
.message-error { border-color: var(--danger); color: var(--danger); }
.message-success { border-color: var(--success); }

/* ─── Main content ────────────────────────────────────────────────── */
.main-content { padding: 1.5rem; }

/* ─── Dashboard ───────────────────────────────────────────────────── */
.stats-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: border-color 0.2s;
}
.stat:hover { border-color: var(--border2); }
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}
.stat-label { color: var(--text2); font-size: 0.75rem; }
.stat-danger { border-color: var(--danger); }
.stat-danger .stat-num { color: var(--danger); }
.stat-warn { border-color: var(--warn); }
.stat-warn .stat-num { color: var(--warn); }

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1.5rem;
  align-items: start;
}

/* ─── Category blocks ─────────────────────────────────────────────── */
.cat-block {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-top: 3px solid var(--cat-color, var(--accent));
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.cat-block:hover { box-shadow: var(--shadow); }

.cat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}
.cat-header-left { display: flex; align-items: center; gap: 0.6rem; }

.cat-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--cat-color, var(--accent));
  flex-shrink: 0;
}

.cat-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}

.cat-count {
  background: var(--bg);
  color: var(--text2);
  font-size: 0.7rem;
  padding: 0.1rem 0.45rem;
  border-radius: 20px;
  border: 1px solid var(--border);
}

.cat-overdue-badge {
  background: color-mix(in srgb, var(--danger) 15%, transparent);
  color: var(--danger);
  font-size: 0.7rem;
  padding: 0.1rem 0.5rem;
  border-radius: 20px;
  border: 1px solid var(--danger);
}

.cat-header-actions { display: flex; gap: 0.35rem; align-items: center; }

/* ─── Tasks ───────────────────────────────────────────────────────── */
.task-list { padding: 0.5rem; }

.task-item {
  border-radius: var(--radius-sm);
  margin-bottom: 0.35rem;
  border-left: 3px solid transparent;
  background: var(--bg);
  transition: background 0.15s;
}
.task-item:hover { background: var(--bg3); }
.task-item.priority-high { border-left-color: var(--danger); }
.task-item.priority-medium { border-left-color: var(--warn); }
.task-item.priority-low { border-left-color: var(--text3); }
.task-item.is-overdue { background: color-mix(in srgb, var(--danger) 5%, var(--bg)); }

.task-main {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.55rem 0.65rem;
}

.task-check {
  background: none;
  border: none;
  padding: 2px;
  margin-top: 2px;
  flex-shrink: 0;
}

.check-circle {
  display: block;
  width: 18px; height: 18px;
  border: 2px solid var(--border2);
  border-radius: 50%;
  transition: all 0.15s;
}
.task-check:hover .check-circle {
  border-color: var(--success);
  background: color-mix(in srgb, var(--success) 20%, transparent);
}
.check-circle-filled {
  background: var(--success);
  border-color: var(--success);
}
.check-circle-filled::after {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
  height: 100%;
}
.check-circle-sm { width: 14px; height: 14px; }

.task-body { flex: 1; cursor: pointer; }
.task-title { color: var(--text); font-size: 0.85rem; }
.task-title-done { text-decoration: line-through; color: var(--text3); }

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.priority-pill {
  font-size: 0.65rem;
  padding: 0.1rem 0.45rem;
  border-radius: 20px;
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.priority-pill.priority-high { background: color-mix(in srgb, var(--danger) 20%, transparent); color: var(--danger); }
.priority-pill.priority-medium { background: color-mix(in srgb, var(--warn) 20%, transparent); color: var(--warn); }
.priority-pill.priority-low { background: var(--bg3); color: var(--text3); }

.deadline { font-size: 0.72rem; color: var(--text2); }
.deadline-overdue { color: var(--danger); font-weight: 500; }
.deadline-soon { color: var(--warn); }

.subtask-counter { font-size: 0.7rem; color: var(--text3); }

.task-actions { display: flex; gap: 0.2rem; opacity: 0; transition: opacity 0.15s; }
.task-item:hover .task-actions { opacity: 1; }

/* Expanded detail */
.task-detail {
  padding: 0 0.65rem 0.65rem 2.4rem;
  border-top: 1px solid var(--border);
  margin-top: 0.25rem;
  padding-top: 0.5rem;
}
.task-desc { color: var(--text2); font-size: 0.8rem; line-height: 1.6; margin-bottom: 0.5rem; }

/* Completed section */
.done-section { border-top: 1px solid var(--border); }
.done-summary {
  padding: 0.5rem 1rem;
  color: var(--text3);
  font-size: 0.75rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.done-summary:hover { color: var(--text2); }
.done-list { padding: 0.25rem 0.5rem; }
.task-done { opacity: 0.5; }
.task-done:hover { opacity: 0.8; }

/* Subtasks */
.subtask-list { list-style: none; display: flex; flex-direction: column; gap: 0.3rem; }
.subtask-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.subtask-item:hover { background: var(--bg3); }
.subtask-check { background: none; border: none; padding: 0; }
.subtask-title { font-size: 0.82rem; color: var(--text2); }
.subtask-done .subtask-title { text-decoration: line-through; color: var(--text3); }
.subtask-done .check-circle-sm { background: var(--success); border-color: var(--success); }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* ─── Sidebar ─────────────────────────────────────────────────────── */
.sidebar-col { position: sticky; top: 72px; }
.sidebar-panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.mt-panel { margin-top: 1rem; }

.panel-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.75rem;
}
.panel-empty { color: var(--text3); font-size: 0.8rem; }

.upcoming-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.upcoming-item {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.45rem;
  border-radius: var(--radius-sm);
  background: var(--bg3);
}
.upcoming-item.is-overdue { background: color-mix(in srgb, var(--danger) 8%, var(--bg3)); }
.upcoming-cat {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.6rem;
  color: #fff;
  flex-shrink: 0;
}
.upcoming-info { display: flex; flex-direction: column; gap: 0.15rem; }
.upcoming-title { font-size: 0.78rem; color: var(--text); line-height: 1.3; }
.upcoming-date { font-size: 0.7rem; color: var(--text2); }
.upcoming-item.is-overdue .upcoming-date { color: var(--danger); }

.cat-nav-list { list-style: none; display: flex; flex-direction: column; gap: 0.25rem; }
.cat-nav-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-size: 0.8rem;
  transition: all 0.15s;
}
.cat-nav-item:hover { background: var(--bg3); color: var(--text); }
.cat-nav-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.cat-nav-count { margin-left: auto; color: var(--text3); font-size: 0.72rem; }
.cat-nav-add { color: var(--accent); }

/* ─── Buttons ─────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--accent2); color: #fff; }
.btn-primary:active { transform: scale(0.98); }
.full-width { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn-ghost:hover { border-color: var(--text2); color: var(--text); background: var(--bg3); }
.btn-sm { font-size: 0.72rem; padding: 0.25rem 0.55rem; }
.btn-xs { font-size: 0.65rem; padding: 0.15rem 0.4rem; }
.btn-danger-ghost:hover { border-color: var(--danger); color: var(--danger); background: transparent; }

.inline-form { display: inline; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }

/* ─── Forms ───────────────────────────────────────────────────────── */
.form-page {
  max-width: 760px;
  margin: 0 auto;
}
.form-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 480px;
  margin: 0 auto;
}
.form-card-wide { max-width: 100%; }
.form-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.field-group { margin-bottom: 1.25rem; }
.field-group label {
  display: block;
  font-size: 0.72rem;
  color: var(--text2);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-display);
  font-weight: 600;
}
.field-group input,
.field-group select,
.field-group textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.field-group input:focus,
.field-group select:focus,
.field-group textarea:focus { border-color: var(--accent); }
.field-group textarea { resize: vertical; }
.field-group select { appearance: none; }

.field-row { display: flex; gap: 1rem; }
.flex-1 { flex: 1; }
.flex-2 { flex: 2; }

.color-row { display: flex; align-items: center; gap: 0.75rem; }
.color-row input[type="color"] { width: 44px; height: 44px; border-radius: var(--radius-sm); cursor: pointer; border: 1px solid var(--border); background: transparent; }
.color-swatches { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.swatch {
  width: 22px; height: 22px;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.15s;
  border: 2px solid transparent;
}
.swatch:hover { transform: scale(1.2); border-color: var(--text); }

.subtask-input-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.4rem;
}
.subtask-input-row input { flex: 1; }

.form-actions { display: flex; justify-content: flex-end; gap: 0.75rem; margin-top: 1.5rem; align-items: center; }

/* ─── Login ───────────────────────────────────────────────────────── */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 20% 50%, color-mix(in srgb, var(--accent) 8%, transparent) 0%, transparent 60%),
    var(--bg);
}
.login-wrap { width: 100%; max-width: 380px; padding: 1rem; }
.login-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
}
.login-logo {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--accent);
}
.login-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.25rem;
}
.login-sub { color: var(--text2); font-size: 0.8rem; text-align: center; margin-bottom: 1.75rem; }

/* ─── Detail page extras ──────────────────────────────────────────── */
.detail-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.detail-cat { font-size: 0.75rem; color: var(--text2); font-family: var(--font-display); font-weight: 600; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.badge-done {
  background: color-mix(in srgb, var(--success) 20%, transparent);
  color: var(--success);
  font-size: 0.72rem;
  padding: 0.1rem 0.55rem;
  border-radius: 20px;
}
.detail-desc {
  background: var(--bg3);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: var(--text2);
  font-size: 0.82rem;
  line-height: 1.7;
}

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .main-content { padding: 0.75rem; }
  .stats-bar { flex-wrap: wrap; }
  .stat { flex: 1 1 calc(50% - 0.5rem); min-width: 120px; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .sidebar-col { position: static; order: -1; display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .mt-panel { margin-top: 0; }
  .task-actions { opacity: 1; }
  .field-row { flex-direction: column; }
  .topnav { padding: 0 0.75rem; }
  .nav-brand { font-size: 0.95rem; }
}

@media (max-width: 480px) {
  .sidebar-col { grid-template-columns: 1fr; }
  .form-card { padding: 1.25rem; }
}