/* ─── Reset & base ─────────────────────────────────────────────────────────── */

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

:root {
  --c-bg:        #f9fafb;
  --c-surface:   #ffffff;
  --c-border:    #e5e7eb;
  --c-text:      #111827;
  --c-muted:     #6b7280;
  --c-accent:    #2563eb;
  --c-accent-h:  #1d4ed8;
  --c-danger:    #dc2626;
  --c-warn:      #d97706;
  --c-success:   #16a34a;
  --c-purple:    #7c3aed;
  --c-amber:     #d97706;

  --radius:  8px;
  --radius-sm: 4px;
  --shadow:  0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --transition: 150ms ease;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

html { font-size: 15px; }

body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.55;
  min-height: 100vh;
}

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

/* ─── Layout shell ─────────────────────────────────────────────────────────── */

#app { min-height: 100vh; display: flex; flex-direction: column; }

.app-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.app-header .logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--c-accent);
  letter-spacing: -.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-app-logo {
  height: 32px;
  width: 32px;
  border-radius: 7px;
  object-fit: contain;
  flex-shrink: 0;
}

.header-kinnu-logo {
  height: 24px;
  width: 24px;
  object-fit: contain;
  border-radius: 3px;
  opacity: 0.75;
  margin-right: 4px;
}

.app-header .breadcrumb {
  color: var(--c-muted);
  font-size: .85rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-header .breadcrumb span { color: var(--c-text); font-weight: 500; }

.header-actions { margin-left: auto; display: flex; gap: 8px; }

.main { flex: 1; padding: 32px 24px; max-width: 1200px; margin: 0 auto; width: 100%; }

/* ─── Stepper ──────────────────────────────────────────────────────────────── */

.stepper {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 28px;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: var(--c-muted);
}

.step-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--c-border);
  color: var(--c-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}

.step.active .step-num  { background: var(--c-accent); color: #fff; }
.step.done   .step-num  { background: var(--c-success); color: #fff; }
.step.active .step-label { color: var(--c-text); font-weight: 500; }

.step-connector {
  flex: 1;
  height: 2px;
  background: var(--c-border);
  margin: 0 8px;
}

/* ─── Cards ────────────────────────────────────────────────────────────────── */

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-body { padding: 24px; }

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 16px;
}

/* ─── Buttons ──────────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), box-shadow var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
}
.btn-primary:hover:not(:disabled) { background: var(--c-accent-h); }

.btn-secondary {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn-secondary:hover:not(:disabled) { background: var(--c-bg); }

.btn-danger {
  background: transparent;
  color: var(--c-danger);
  border-color: var(--c-danger);
}
.btn-danger:hover:not(:disabled) { background: #fef2f2; }

.btn-ghost {
  background: transparent;
  color: var(--c-muted);
  border-color: transparent;
  padding: 6px 10px;
}
.btn-ghost:hover:not(:disabled) { background: var(--c-bg); color: var(--c-text); }

.btn-sm { padding: 5px 12px; font-size: .82rem; }
.btn-lg { padding: 11px 24px; font-size: .95rem; }
.btn-icon { padding: 7px; }

/* ─── Form controls ────────────────────────────────────────────────────────── */

.form-group { display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; }

label { font-size: .85rem; font-weight: 500; color: var(--c-text); }

.form-hint { font-size: .78rem; color: var(--c-muted); }

input[type=text], input[type=date], input[type=number],
select, textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-family: var(--font);
  background: var(--c-surface);
  color: var(--c-text);
  transition: border-color var(--transition);
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

textarea { resize: vertical; min-height: 90px; }

input[type=number] { width: auto; min-width: 80px; }

/* Inline number spinner (small) */
.spinner-group {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  width: fit-content;
}
.spinner-group input[type=number] {
  border: none;
  text-align: center;
  width: 52px;
  padding: 6px 4px;
  border-radius: 0;
}
.spinner-group button {
  background: var(--c-bg);
  border: none;
  width: 28px;
  height: 34px;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--c-muted);
  line-height: 1;
}
.spinner-group button:hover { background: var(--c-border); }

/* Radio / checkbox */
.radio-group, .checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.radio-option, .checkbox-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.radio-option input[type=radio], .checkbox-option input[type=checkbox] {
  width: 16px; height: 16px;
  margin-top: 2px;
  accent-color: var(--c-accent);
  flex-shrink: 0;
}

.radio-option .option-label, .checkbox-option .option-label {
  font-size: .9rem;
  font-weight: 500;
}

.radio-option .option-desc, .checkbox-option .option-desc {
  font-size: .8rem;
  color: var(--c-muted);
  margin-top: 2px;
}

/* Mode selector cards */
.mode-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.mode-card {
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.mode-card:hover { border-color: var(--c-accent); background: #eff6ff; }
.mode-card.selected { border-color: var(--c-accent); background: #eff6ff; }
.mode-card h4 { font-size: .9rem; font-weight: 600; margin-bottom: 4px; }
.mode-card p  { font-size: .8rem; color: var(--c-muted); line-height: 1.4; }

/* ─── Topics table ─────────────────────────────────────────────────────────── */

.topics-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.topics-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}

.topics-table th {
  background: var(--c-bg);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: .8rem;
  color: var(--c-muted);
  border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}

.topics-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: middle;
}

.topics-table tr:last-child td { border-bottom: none; }

.topics-table tr:hover td { background: #f9fafb; }

.topics-table tr.dragging { opacity: .5; }
.topics-table tr.drag-over td { border-top: 2px solid var(--c-accent); }

/* Hierarchy: group header rows */
.topics-table tr.topic-group-row td {
  background: #eff6ff;
  border-bottom: 1px solid #bfdbfe;
}
.topics-table tr.topic-group-row:hover td { background: #dbeafe; }

/* Hierarchy: sub-topic rows */
.topics-table tr.topic-subtopic-row td { background: #fafafa; }
.topics-table tr.topic-subtopic-row:hover td { background: #f3f4f6; }

.topics-table .col-num   { width: 40px; color: var(--c-muted); }
.topics-table .col-title { min-width: 220px; }
.topics-table .col-diff  { width: 110px; }
.topics-table .col-state { width: 140px; }
.topics-table .col-actions { width: 80px; white-space: nowrap; }

.topics-table input[type=text] { padding: 5px 8px; font-size: .88rem; }

/* Inline select (compact) */
.select-sm {
  padding: 5px 8px;
  font-size: .82rem;
  width: auto;
}

/* ─── State legend ─────────────────────────────────────────────────────────── */

.state-legend {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-top: 12px;
  font-size: .82rem;
}

.state-legend h4 { font-size: .85rem; font-weight: 600; margin-bottom: 8px; }

.state-legend table { width: 100%; border-collapse: collapse; }
.state-legend th, .state-legend td {
  padding: 4px 8px;
  text-align: left;
  border-bottom: 1px solid #fde68a;
}
.state-legend th { font-weight: 600; }
.state-legend tr:last-child td { border-bottom: none; }

/* ─── Chart legend ─────────────────────────────────────────────────────────── */

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 8px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  font-size: .8rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 2px;
  border: 1px solid rgba(0,0,0,.12);
  flex-shrink: 0;
}

.legend-label { color: var(--c-text); }

/* ─── Schedule grid ────────────────────────────────────────────────────────── */

.schedule-grid {
  display: grid;
  grid-template-columns: 100px repeat(2, 90px);
  gap: 1px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: .88rem;
  width: fit-content;
}

.schedule-grid .sg-header {
  background: var(--c-bg);
  padding: 8px 12px;
  font-weight: 600;
  font-size: .8rem;
  color: var(--c-muted);
  border-bottom: 1px solid var(--c-border);
}

.schedule-grid .sg-day {
  background: var(--c-surface);
  padding: 6px 12px;
  font-weight: 500;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--c-border);
}

.schedule-grid .sg-cell {
  background: var(--c-surface);
  padding: 4px 8px;
  border-bottom: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.schedule-grid .sg-cell input[type=number] {
  width: 56px; padding: 4px 6px; font-size: .88rem;
}

.sg-time {
  font-size: .72rem;
  color: var(--c-muted);
  padding-left: 2px;
}

/* Time-mode schedule grid — wider columns */
.schedule-grid.time-mode {
  grid-template-columns: 100px repeat(2, 140px);
}

/* +/− time control inside a cell */
.sg-time-ctrl {
  display: flex;
  align-items: center;
  gap: 4px;
}

.sg-step-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  color: var(--c-text);
}
.sg-step-btn:hover:not(:disabled) { background: var(--c-border); }
.sg-step-btn:disabled { opacity: .35; cursor: default; }

.sg-time-val {
  font-size: .88rem;
  font-weight: 500;
  min-width: 52px;
  text-align: center;
}

.sg-sessions-hint {
  font-size: .72rem;
  color: var(--c-muted);
  padding-left: 2px;
}

/* Session length info bar shown above tabs and in schedule */
.session-length-note {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .8rem;
  color: var(--c-muted);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  padding: 4px 10px;
}

/* ─── Plan view tabs ───────────────────────────────────────────────────────── */

.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--c-border);
  margin-bottom: 20px;
}

.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
}

.tab-btn:hover { color: var(--c-text); }
.tab-btn.active { color: var(--c-accent); border-bottom-color: var(--c-accent); }

/* ─── Daily plan ───────────────────────────────────────────────────────────── */

.day-block {
  margin-bottom: 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.day-header {
  background: var(--c-bg);
  padding: 8px 14px;
  font-size: .85rem;
  font-weight: 600;
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.day-header .session-count {
  font-size: .78rem;
  color: var(--c-muted);
  font-weight: 400;
}

.day-header:hover { background: var(--c-surface); }

.day-expand-icon {
  font-size: .68rem;
  color: var(--c-muted);
  flex-shrink: 0;
}

.day-time-est {
  font-size: .75rem;
  color: var(--c-muted);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: .88rem;
  font-weight: 500;
}

.session-row {
  display: flex;
  align-items: center;
  padding: 8px 14px;
  gap: 12px;
  border-bottom: 1px solid var(--c-border);
  font-size: .87rem;
}

.session-row:last-child { border-bottom: none; }

.activity-pill {
  padding: 2px 9px;
  border-radius: 99px;
  font-size: .75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.pill-learn    { background: #dbeafe; color: #1e40af; }
.pill-practice { background: #fef3c7; color: #92400e; }
.pill-review   { background: #dcfce7; color: #166534; }
.pill-mock     { background: #ede9fe; color: #5b21b6; }
.pill-postmock { background: #f3e8ff; color: #6b21a8; }

.session-topic  { flex: 1; font-weight: 500; }
.session-count-badge {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 99px;
  padding: 1px 8px;
  font-size: .75rem;
  color: var(--c-muted);
}
.session-reason { color: var(--c-muted); font-size: .8rem; flex: 1; }

/* ─── Topics summary table ─────────────────────────────────────────────────── */

.topic-summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .87rem;
}

.topic-summary-table th {
  background: var(--c-bg);
  padding: 9px 12px;
  text-align: left;
  font-weight: 600;
  font-size: .8rem;
  color: var(--c-muted);
  border-bottom: 2px solid var(--c-border);
}

.topic-summary-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}

.topic-summary-table tr:last-child td { border-bottom: none; }
.topic-summary-table tr:hover td { background: #f9fafb; }
.topic-summary-table tr.topic-group-header-row td {
  background: #eff6ff;
  font-size: .9rem;
  padding-top: 10px;
  padding-bottom: 10px;
  border-top: 1px solid #bfdbfe;
}
.topic-summary-table tr.topic-group-header-row:hover td { background: #dbeafe; }
.topic-summary-table tr.topic-subtopic-row td { background: #fafafa; }

.activity-list { display: flex; flex-direction: column; gap: 3px; }
.activity-entry {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: .83rem;
}
.activity-entry .date  { color: var(--c-muted); min-width: 80px; flex-shrink: 0; }
.activity-entry .type  { font-weight: 500; min-width: 120px; flex-shrink: 0; }
.activity-entry .note  { color: var(--c-muted); }

.activity-entry--past {
  opacity: .5;
}

.activity-entry--done {
  text-decoration: line-through;
}

.activity-entry--past.activity-entry--done {
  opacity: .5;
  text-decoration: line-through;
}

/* ─── Chart container ──────────────────────────────────────────────────────── */

.chart-outer {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 70vh;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  position: relative;
}

.chart-tooltip {
  position: fixed;
  background: rgba(17,24,39,.9);
  color: #fff;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  pointer-events: none;
  z-index: 999;
  white-space: nowrap;
}

/* ─── Overflow / negotiation ───────────────────────────────────────────────── */

/* ── Plan stats bar ─────────────────────────────────────────────────── */
.plan-stats-bar {
  display: flex;
  gap: 0;
  background: #f8faff;
  border: 1px solid #dbeafe;
  border-radius: var(--radius);
  margin-bottom: 20px;
  overflow: hidden;
}
.plan-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 24px;
  border-right: 1px solid #dbeafe;
  flex: 1;
}
.plan-stat:last-child { border-right: none; }
.plan-stat--highlight {
  background: #eff6ff;
}
.plan-stat-value {
  font-size: 1.45rem;
  font-weight: 700;
  color: #1e3a5f;
  line-height: 1.1;
}
.plan-stat--highlight .plan-stat-value { color: #1d4ed8; }
.plan-stat-label {
  font-size: .72rem;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-top: 2px;
}

.overflow-panel {
  border: 2px solid var(--c-warn);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.overflow-panel.ok { border-color: var(--c-success); }

.overflow-header {
  background: #fffbeb;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.overflow-panel.ok .overflow-header { background: #f0fdf4; }

.overflow-header h3 {
  font-size: .95rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.overflow-body { padding: 20px; }

.overflow-summary {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: .88rem;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ─── Settings ─────────────────────────────────────────────────────────────── */

.settings-section { margin-bottom: 28px; }
.settings-section h3 { font-size: .95rem; font-weight: 600; margin-bottom: 14px; border-bottom: 1px solid var(--c-border); padding-bottom: 6px; }

.expandable { border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; }
.expandable-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  background: var(--c-bg);
  user-select: none;
  font-weight: 500;
}
.expandable-body { padding: 20px; }

.sr-input { font-family: monospace; letter-spacing: .03em; }

.sr-table, .activity-count-table {
  border-collapse: collapse;
  font-size: .88rem;
}

.sr-table th, .sr-table td,
.activity-count-table th, .activity-count-table td {
  padding: 7px 14px;
  border: 1px solid var(--c-border);
  text-align: center;
}

.sr-table th, .activity-count-table th {
  background: var(--c-bg);
  font-weight: 600;
  font-size: .8rem;
  color: var(--c-muted);
}

.activity-count-table td input[type=number] {
  width: 60px; text-align: center; padding: 4px;
}

/* ─── Home screen ──────────────────────────────────────────────────────────── */

.home-hero {
  text-align: center;
  padding: 60px 24px 48px;
}

.home-hero-logo {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  object-fit: contain;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
}

.home-hero h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -.5px;
}

.home-hero p {
  color: var(--c-muted);
  font-size: 1.05rem;
  max-width: 460px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.home-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.action-card {
  background: var(--c-surface);
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 36px;
  min-width: 220px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.action-card:hover { border-color: var(--c-accent); box-shadow: var(--shadow-md); }

.action-card .action-icon { font-size: 2rem; margin-bottom: 10px; }
.action-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.action-card p { font-size: .83rem; color: var(--c-muted); line-height: 1.4; }

/* ─── Alerts & badges ──────────────────────────────────────────────────────── */

.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: .88rem;
  margin-bottom: 12px;
}
.alert-warn  { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
.alert-error { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.alert-info  { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; }
.alert-ok    { background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; }

.free-text-applied-banner {
  background: #f0fdf4;
  border: 1px solid #86efac;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 14px;
  color: #166534;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: .73rem;
  font-weight: 600;
}
.badge-blue   { background: #dbeafe; color: #1e40af; }
.badge-green  { background: #dcfce7; color: #166534; }
.badge-amber  { background: #fef3c7; color: #92400e; }
.badge-red    { background: #fee2e2; color: #991b1b; }
.badge-purple { background: #ede9fe; color: #5b21b6; }

/* ─── Loading spinner ──────────────────────────────────────────────────────── */

.spinner {
  width: 22px; height: 22px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}

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

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  gap: 14px;
  color: var(--c-muted);
  font-size: .9rem;
}

/* ─── Dividers & spacing ───────────────────────────────────────────────────── */

.divider { height: 1px; background: var(--c-border); margin: 20px 0; }

.row { display: flex; gap: 16px; align-items: flex-start; }
.col { flex: 1; }

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.section-sub {
  font-size: .85rem;
  color: var(--c-muted);
  margin-bottom: 20px;
}

.action-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  margin-top: 20px;
}

/* ─── Calendar view ────────────────────────────────────────────────────────── */

.cal-wrap { position: relative; }

.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.cal-nav-pager {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cal-month-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  min-width: 180px;
  text-align: center;
  display: inline-block;
}

.cal-today-btn {
  border: 1px solid var(--c-border) !important;
  margin-right: 4px;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 14px;
}

.cal-dow {
  text-align: center;
  font-size: .72rem;
  font-weight: 700;
  color: var(--c-muted);
  padding: 4px 0 8px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.cal-cell {
  min-height: 72px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  position: relative;
  padding: 6px 6px 5px;
  background: var(--c-surface);
  cursor: default;
  transition: border-color .15s, box-shadow .15s;
  display: flex;
  flex-direction: column;
}

.cal-cell--pad {
  background: transparent;
  border-color: transparent;
  pointer-events: none;
}

.cal-cell--study {
  background: var(--c-bg);
  cursor: pointer;
}

.cal-cell--study:hover {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 2px rgba(99,102,241,.08);
}

.cal-cell--selected {
  border-color: var(--c-accent);
  background: #eff6ff;
  box-shadow: 0 0 0 2px rgba(99,102,241,.15);
}

.cal-cell--today {
  border-color: var(--c-accent);
}

.cal-cell--today .cal-day-num {
  background: var(--c-accent);
  color: #fff;
  border-radius: 50%;
}

.cal-cell--exam {
  border-color: #dc2626;
}

.cal-cell--exam .cal-day-num {
  background: #dc2626;
  color: #fff;
  border-radius: 50%;
}

.cal-day-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: .76rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 4px;
}

.cal-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.cal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  display: inline-block;
}

.cal-cell-count {
  position: absolute;
  bottom: 3px;
  right: 5px;
  font-size: .66rem;
  color: var(--c-muted);
  font-weight: 500;
}

.cal-cell-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2px;
  margin-bottom: 4px;
}

.cal-cell-time {
  font-size: .6rem;
  color: var(--c-muted);
  white-space: nowrap;
  padding-top: 3px;
  flex-shrink: 0;
}

.cal-bars {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: auto;
}

.cal-bar {
  height: 4px;
  border-radius: 2px;
  min-width: 4px;
}

/* Calendar view toggle (Month / Week) */
.cal-view-toggle {
  display: flex;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  overflow: hidden;
}

.cal-toggle-btn {
  padding: 4px 14px;
  font-size: .78rem;
  font-weight: 500;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--c-muted);
  transition: background .12s, color .12s;
}

.cal-toggle-btn.active {
  background: var(--c-accent);
  color: #fff;
}

/* Weekly calendar: Design C agenda list */
.cal-week-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 14px;
}

.cal-wday {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: default;
  transition: background .1s, border-color .12s;
}

.cal-wday--study {
  cursor: pointer;
  border-color: var(--c-border);
  background: var(--c-surface);
}

.cal-wday--study:hover {
  border-color: var(--c-accent);
  background: var(--c-bg);
}

.cal-wday--selected {
  border-color: var(--c-accent) !important;
  background: #eff6ff !important;
}

.cal-wday--today .cal-wday-dow,
.cal-wday--today:not(.cal-wday--selected) .cal-wday-num {
  color: var(--c-accent);
}

.cal-wday--blocked {
  border-color: var(--c-border);
  background: repeating-linear-gradient(-45deg, #fef9f0, #fef9f0 4px, #fde68a 4px, #fde68a 5px);
  opacity: .7;
}

.cal-wday--break {
  border-color: var(--c-border);
  background: repeating-linear-gradient(-45deg, #f0fdf4, #f0fdf4 4px, #bbf7d0 4px, #bbf7d0 5px);
  opacity: .75;
}

.cal-wday-break-label {
  color: #16a34a;
  font-style: italic;
}

.cal-wday--off {
  opacity: .55;
}

.cal-wday--exam .cal-wday-num {
  background: #dc2626;
  color: #fff;
  border-radius: 50%;
}

.cal-wday-date {
  width: 44px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cal-wday-dow {
  font-size: .62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--c-muted);
}

.cal-wday-num {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  line-height: 1;
}

.cal-wday-num--today {
  background: var(--c-accent);
  color: #fff;
}

.cal-wday-num--exam {
  background: #dc2626;
  color: #fff;
}

.cal-wday-bar {
  flex: 1;
  display: flex;
  align-items: center;
  min-width: 0;
}

.cal-wday-bar-track {
  height: 22px;
  display: flex;
  border-radius: 4px;
  overflow: hidden;
  min-width: 4px;
}

.cal-wday-seg {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .6rem;
  font-weight: 700;
  color: rgba(255,255,255,.9);
  padding: 0 5px;
  white-space: nowrap;
  overflow: hidden;
  min-width: 0;
}

.cal-wday-off-label {
  font-size: .72rem;
  color: var(--c-muted);
}

.cal-wday-time {
  font-size: .78rem;
  font-weight: 600;
  color: var(--c-text);
  min-width: 44px;
  text-align: right;
  flex-shrink: 0;
}

/* Calendar legend */
.cal-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 8px 0;
  margin-bottom: 16px;
  font-size: .78rem;
  color: var(--c-muted);
}

.cal-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.cal-legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 2px solid var(--c-accent);
}

.cal-cell--exam.cal-legend-swatch { border-color: #dc2626; }

/* Day detail panel */
.cal-detail {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  overflow: hidden;
  margin-top: 8px;
}

.cal-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-border);
  font-size: .88rem;
}

.cal-detail-meta {
  font-size: .78rem;
  color: var(--c-muted);
  font-weight: 400;
}

.cal-detail-body { padding: 4px 0; }

.cal-detail-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  font-size: .85rem;
  border-bottom: 1px solid var(--c-border);
}

.cal-detail-row:last-child { border-bottom: none; }

.cal-detail-collapse-btn {
  padding: 2px 8px;
  font-size: .8rem;
  flex-shrink: 0;
}

.cal-detail-row--done {
  text-decoration: line-through;
  opacity: .6;
}

.cal-detail-row--skip {
  opacity: .45;
  font-style: italic;
}

.cal-detail-topic {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Tracking feature ─────────────────────────────────────────────────────── */

/* Action card disabled state (Track Progress when no plans exist) */
.action-card--disabled {
  opacity: .55;
  cursor: not-allowed;
  pointer-events: none;
}
.action-card--disabled:hover { transform: none; box-shadow: var(--shadow); }

/* Plan list screen */
.plan-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}
.plan-list-item:last-child { border-bottom: none; }

.plan-list-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.plan-list-meta {
  font-size: .78rem;
  color: var(--c-muted);
}

.plan-list-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* Tracking banner */
.tracking-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 14px;
  font-size: .88rem;
}

.tracking-banner-left  { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tracking-banner-right { display: flex; align-items: center; gap: 8px;  flex-shrink: 0; }

.tracking-badge {
  background: #2563eb;
  color: #fff;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: .78rem;
  font-weight: 600;
}

.tracking-today { color: var(--c-text); }

.tracking-simulated {
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: .78rem;
  color: #92400e;
}

.tracking-cal-hint {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .82rem;
  color: var(--c-muted);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 10px;
}

/* Unified width for Apply & Update and Skip/Unblock buttons */
.tracking-action-btn {
  min-width: 130px;
  text-align: center;
}

/* Day-by-day: today highlight */
.day-block--today > .day-header {
  background: #eff6ff;
  border-left: 3px solid #2563eb;
}

.today-badge {
  background: #2563eb;
  color: #fff;
  border-radius: 4px;
  padding: 1px 7px;
  font-size: .72rem;
  font-weight: 600;
  margin-left: 4px;
}

/* Day-by-day: past day — dim only */
.day-block--past > .day-header {
  opacity: .5;
}

/* Day-by-day: all activities done — strikethrough */
.day-block--all-done > .day-header {
  text-decoration: line-through;
}

.day-block--past.day-block--all-done > .day-header {
  opacity: .5;
  text-decoration: line-through;
}

/* Day-by-day: blocked day */
.day-block--blocked { opacity: .55; }
.day-block--blocked > .day-header { background: #fef9f0; border-left: 3px solid #f59e0b; }

.day-block--break > .day-header {
  background: #f0fdf4;
  border-left: 3px solid #16a34a;
  color: var(--c-muted);
}

.break-day-badge {
  background: #16a34a;
  color: #fff;
  border-radius: 4px;
  padding: 1px 7px;
  font-size: .72rem;
  font-weight: 600;
  margin-left: 4px;
}

.blocked-badge {
  background: #f59e0b;
  color: #fff;
  border-radius: 4px;
  padding: 1px 7px;
  font-size: .72rem;
  font-weight: 600;
  margin-left: 4px;
}

/* Session row tracking states */
.session-row--done {
  text-decoration: line-through;
  opacity: .6;
}

.session-row--skip {
  opacity: .45;
  font-style: italic;
}

/* Track done/skip buttons (compact) */
.track-btn {
  font-size: .72rem;
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-muted);
  cursor: pointer;
  flex-shrink: 0;
  line-height: 1.4;
}

.track-btn:hover {
  background: var(--c-bg);
}

.track-btn--done {
  background: #16a34a;
  color: #fff;
  border-color: #15803d;
}

.track-btn--done:hover {
  background: #15803d;
}

.track-btn--skip {
  background: #dc2626;
  color: #fff;
  border-color: #b91c1c;
}

.track-btn--skip:hover {
  background: #b91c1c;
}

.track-locked-badge {
  margin-left: auto;
  font-size: .75rem;
  opacity: .45;
  cursor: default;
  user-select: none;
}

/* Day block button (skip/unblock) */
.day-block-btn {
  margin-left: auto;
  font-size: .75rem;
  padding: 2px 8px;
  color: var(--c-muted);
}

.day-block-btn--blocked {
  color: #d97706;
}

/* Calendar: blocked cell */
.cal-cell--blocked {
  background: repeating-linear-gradient(
    -45deg,
    #fef9f0,
    #fef9f0 4px,
    #fde68a 4px,
    #fde68a 5px
  );
  opacity: .7;
}

.cal-cell--break {
  background: repeating-linear-gradient(
    -45deg,
    #f0fdf4,
    #f0fdf4 4px,
    #bbf7d0 4px,
    #bbf7d0 5px
  );
  opacity: .75;
}

/* Calendar: past day — dim only */
.cal-cell--past {
  opacity: .7;
}

/* Calendar: past-day X overlay (monthly) */
.cal-past-x {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 200;
  color: rgba(0,0,0,.18);
  pointer-events: none;
  border-radius: inherit;
  line-height: 1;
}

/* Weekly agenda: past row — dim */
.cal-wday--past {
  opacity: .75;
}

/* Weekly agenda: past-day X overlay on date column */
.cal-wday-date { position: relative; }

.cal-wday-past-x {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 200;
  color: rgba(0,0,0,.28);
  pointer-events: none;
}

/* Calendar: blocked detail */
.cal-detail-blocked {
  background: #fef3c7;
  border-bottom: 1px solid var(--c-border);
  padding: 8px 14px;
  font-size: .82rem;
  color: #92400e;
}

/* Auto-mark prompt overlay */
.automark-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.automark-dialog {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 28px 32px;
  max-width: 420px;
  width: 100%;
}

/* Manual mark reminder banner */
.manual-mark-reminder {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fefce8;
  border: 1px solid #fde047;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: .85rem;
  color: #713f12;
  margin-bottom: 12px;
}

/* Debug dialog */
.debug-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.debug-dialog {
  background: var(--c-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 24px;
  width: min(420px, 90vw);
  border: 2px solid #f59e0b;
}

/* ─── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 760px) {
  .mode-cards { grid-template-columns: 1fr; }
  .main { padding: 20px 14px; }
  .home-hero h1 { font-size: 1.5rem; }
  .action-card { min-width: 160px; padding: 20px 20px; }
  .tab-btn { padding: 9px 14px; font-size: .84rem; }
}

/* ── New schedule layout ────────────────────────────────────────────────── */

.schedule-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.schedule-left {
  flex: 0 0 auto;
  min-width: 260px;
}

.schedule-right {
  flex: 1 1 280px;
  min-width: 260px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sched-week-title {
  font-size: .82rem;
  font-weight: 600;
  color: var(--c-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .03em;
}

.sched-table {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: .88rem;
}

.sched-row {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface);
}
.sched-row:last-child { border-bottom: none; }

.sched-header-row {
  background: var(--c-bg);
  font-weight: 600;
  font-size: .78rem;
  color: var(--c-muted);
}

.sched-apply-row {
  background: var(--c-bg);
}

.sched-day-col {
  width: 46px;
  min-width: 46px;
  padding: 7px 10px;
  font-weight: 500;
}

.sched-ctrl-col {
  flex: 1;
  padding: 5px 8px;
}

.sched-hint-col {
  width: 72px;
  min-width: 72px;
  padding: 5px 8px;
  font-size: .72rem;
  color: var(--c-muted);
}

.sched-total {
  margin-top: 8px;
  font-size: .85rem;
  color: var(--c-muted);
}
.sched-total strong { color: var(--c-text); }

/* Break days chips */
.break-days-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 4px;
}
.break-day-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #f1f5f9;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 2px 8px 2px 10px;
  font-size: .82rem;
  color: var(--c-text);
}
.break-day-remove {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0 2px;
  color: var(--c-muted);
}
.break-day-remove:hover { color: var(--c-error); }

/* Chart area */
.sched-chart-wrap {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  overflow: hidden;
  height: 180px;
  position: relative;
}

.sched-chart-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.sched-chart-meta {
  font-size: .85rem;
  color: var(--c-text);
}
.sched-chart-meta strong { color: var(--c-text); }

/* Ramp + intensity controls below the chart */
.sched-ramp-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.sched-radio-opt {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  cursor: pointer;
}
.sched-radio-opt input[type=radio] { cursor: pointer; }

.sched-intensity-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sched-intensity-label {
  font-size: .85rem;
  font-weight: 500;
  min-width: 90px;
}

.sched-intensity-hint {
  font-size: .8rem;
  color: var(--c-muted);
}

.sched-tooltip {
  position: absolute;
  transform: translateX(-50%) translateY(-100%);
  background: rgba(17,24,39,0.88);
  color: #fff;
  font-size: .78rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  pointer-events: none;
  white-space: nowrap;
  z-index: 10;
  margin-top: -2px;
}