@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

[hidden] { display: none !important; }

/* ── Tokens ───────────────────────────────────────────────────────────────── */
:root {
  --bg:         #F6F8FA;
  --surface:    #FFFFFF;
  --surface2:   #EFF2F5;
  --border:     #D0D7DE;
  --border2:    #E8ECF0;
  --ink:        #1F2328;
  --ink-mid:    #57606A;
  --ink-low:    #8C959F;
  --accent:     #0969DA;
  --accent-dim: #DDF4FF;
  --green:      #1A7F37;
  --green-dim:  #DAFBE1;
  --amber:      #9A6700;
  --amber-dim:  #FFF8C5;
  --red:        #CF222E;
  --red-dim:    #FFEBE9;
  --purple:     #8250DF;
  --purple-dim: #FBEFFF;
  --topbar-h:   56px;
  --log-h:      0px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #0D1117;
    --surface:    #161B22;
    --surface2:   #21262D;
    --border:     #30363D;
    --border2:    #21262D;
    --ink:        #E6EDF3;
    --ink-mid:    #8B949E;
    --ink-low:    #484F58;
    --accent:     #58A6FF;
    --accent-dim: #0D2045;
    --green:      #3FB950;
    --green-dim:  #0A2118;
    --amber:      #F0A855;
    --amber-dim:  #271A00;
    --red:        #F85149;
    --red-dim:    #2D0F0E;
    --purple:     #BC8CFF;
    --purple-dim: #1A0F2E;
  }
}

:root[data-theme="dark"] {
  --bg:         #0D1117;
  --surface:    #161B22;
  --surface2:   #21262D;
  --border:     #30363D;
  --border2:    #21262D;
  --ink:        #E6EDF3;
  --ink-mid:    #8B949E;
  --ink-low:    #484F58;
  --accent:     #58A6FF;
  --accent-dim: #0D2045;
  --green:      #3FB950;
  --green-dim:  #0A2118;
  --amber:      #F0A855;
  --amber-dim:  #271A00;
  --red:        #F85149;
  --red-dim:    #2D0F0E;
  --purple:     #BC8CFF;
  --purple-dim: #1A0F2E;
}

/* ── Reset ────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Topbar ───────────────────────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-shrink: 0;
}

.brand-name {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand-term {
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-low);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 6px;
  background: var(--surface2);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.tab-nav {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  padding: 6px 14px;
  border: none;
  background: none;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-mid);
  border-radius: 6px;
  white-space: nowrap;
  transition: color 0.1s, background 0.1s;
}
.tab-btn:hover { background: var(--surface2); color: var(--ink); }
.tab-btn.active { background: var(--accent-dim); color: var(--accent); }

/* ── Views ────────────────────────────────────────────────────────────────── */
.view { display: none; padding: 28px 20px 120px; max-width: 1100px; margin: 0 auto; }
.view.active { display: block; }

.view-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.view-sub { font-size: 13px; color: var(--ink-mid); margin-bottom: 24px; }

/* ── Today: two-column ────────────────────────────────────────────────────── */
.today-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 680px) { .today-grid { grid-template-columns: 1fr; } }

.today-col-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-low);
  margin-bottom: 12px;
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.card + .card { margin-top: 10px; }

/* ── Assignment rows ──────────────────────────────────────────────────────── */
.asn-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border2);
}
.asn-row:first-child { padding-top: 0; }
.asn-row:last-child { border-bottom: none; padding-bottom: 0; }

.asn-urgency {
  width: 4px;
  border-radius: 2px;
  align-self: stretch;
  flex-shrink: 0;
  min-height: 36px;
}
.urgency-red { background: var(--red); }
.urgency-amber { background: var(--amber); }
.urgency-muted { background: var(--border); }

.asn-body { flex: 1; min-width: 0; }
.asn-title { font-weight: 500; color: var(--ink); font-size: 13.5px; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.asn-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.asn-due { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--ink-mid); }
.asn-due.urgent { color: var(--red); }
.asn-due.soon { color: var(--amber); }

/* ── Task rows ────────────────────────────────────────────────────────────── */
.task-row {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border2);
  align-items: flex-start;
}
.task-row:first-child { padding-top: 0; }
.task-row:last-child { border-bottom: none; padding-bottom: 0; }

.task-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-low);
  flex-shrink: 0;
  padding-top: 2px;
  min-width: 28px;
}

.task-body { flex: 1; min-width: 0; }
.task-desc { font-size: 13px; color: var(--ink); margin-bottom: 2px; }
.task-okr  { font-size: 11.5px; color: var(--ink-low); }
.task-asn  { font-size: 11.5px; color: var(--accent); margin-left: 6px; }

/* ── Chips / Badges ───────────────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.chip-course  { background: var(--purple-dim); color: var(--purple); }
.chip-not     { background: var(--surface2);   color: var(--ink-low); }
.chip-prog    { background: var(--accent-dim); color: var(--accent); }
.chip-sub     { background: var(--amber-dim);  color: var(--amber); }
.chip-graded  { background: var(--green-dim);  color: var(--green); }
.chip-type    { background: var(--surface2);   color: var(--ink-mid); font-weight: 500; }

/* ── Progress bar ─────────────────────────────────────────────────────────── */
.progress-bar {
  height: 5px;
  background: var(--surface2);
  border-radius: 3px;
  overflow: hidden;
  margin: 6px 0;
}
.progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: 3px;
  transition: width 0.3s;
}

/* ── Tables ───────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-low);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border2);
  color: var(--ink-mid);
  vertical-align: middle;
}
td:first-child { color: var(--ink); font-weight: 500; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--surface2); }

/* ── Deadlines: urgency left border ──────────────────────────────────────── */
tr.row-red td:first-child  { border-left: 3px solid var(--red); padding-left: 9px; }
tr.row-amber td:first-child { border-left: 3px solid var(--amber); padding-left: 9px; }

/* ── Filters row ──────────────────────────────────────────────────────────── */
.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-select {
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  cursor: pointer;
}

/* ── Inline status control ────────────────────────────────────────────────── */
.status-wrap { display: flex; align-items: center; gap: 6px; }

.status-select {
  padding: 3px 7px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  display: none;
}

.status-save {
  display: none;
  padding: 3px 8px;
  border: none;
  border-radius: 5px;
  background: var(--accent);
  color: white;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.status-editing .status-chip { display: none; }
.status-editing .status-select,
.status-editing .status-save { display: inline-flex; }

/* ── Course grid ──────────────────────────────────────────────────────────── */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.course-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
}

.course-name {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 17px;
  color: var(--ink);
  margin-bottom: 4px;
}

.course-meta {
  font-size: 12px;
  color: var(--ink-low);
  margin-bottom: 10px;
  font-family: 'JetBrains Mono', monospace;
}

.course-prog-label {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--ink-mid);
  margin-bottom: 3px;
}

.course-asn-list { margin-top: 14px; }

.course-asn-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border2);
  font-size: 12.5px;
}
.course-asn-item:last-child { border-bottom: none; }
.course-asn-title { flex: 1; color: var(--ink); }
.course-asn-due { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--ink-low); }

.btn-add-asn {
  width: 100%;
  margin-top: 12px;
  padding: 8px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: none;
  color: var(--ink-low);
  font-size: 12.5px;
  cursor: pointer;
  text-align: center;
  font-family: 'Inter', sans-serif;
  transition: color 0.1s, border-color 0.1s;
}
.btn-add-asn:hover { color: var(--accent); border-color: var(--accent); }

/* ── Add assignment inline form ───────────────────────────────────────────── */
.add-asn-form {
  display: none;
  margin-top: 12px;
  padding: 12px;
  background: var(--surface2);
  border-radius: 8px;
  border: 1px solid var(--border);
}
.add-asn-form.open { display: block; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}
@media (max-width: 480px) { .form-grid { grid-template-columns: 1fr; } }

.form-group { display: flex; flex-direction: column; gap: 3px; }

.form-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-low);
}

.form-input, .form-select {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
}
.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-actions { display: flex; gap: 8px; }

.btn-save {
  padding: 7px 14px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
}
.btn-cancel {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: none;
  color: var(--ink-mid);
  font-size: 13px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
}

/* ── OKR Progress rows ────────────────────────────────────────────────────── */
.okr-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 10px;
}

.okr-row-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.okr-objective {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 16px;
  color: var(--ink);
}

.okr-kr { font-size: 12.5px; color: var(--ink-mid); margin-bottom: 8px; }

.okr-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--ink-low);
  margin-top: 8px;
}

.okr-stat strong { color: var(--ink-mid); }

.btn-log {
  padding: 5px 12px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: none;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.1s;
}
.btn-log:hover { background: var(--accent-dim); }

/* ── History datepicker ───────────────────────────────────────────────────── */
.date-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.date-input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  cursor: pointer;
}
.date-input:focus { outline: none; border-color: var(--accent); }

.date-label { font-size: 12px; color: var(--ink-mid); }

/* ── Quick Log drawer ─────────────────────────────────────────────────────── */
.log-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.12);
  transform: translateY(100%);
  transition: transform 0.25s ease;
}
.log-drawer.open { transform: translateY(0); }

.log-drawer-toggle {
  position: fixed;
  bottom: 16px;
  right: 20px;
  z-index: 201;
  padding: 9px 16px;
  border: none;
  border-radius: 20px;
  background: var(--accent);
  color: white;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
  transition: transform 0.1s;
  display: none;
}
.log-drawer-toggle:hover { transform: scale(1.03); }
.log-drawer-toggle.visible { display: flex; align-items: center; gap: 6px; }

.log-drawer-inner {
  padding: 16px 20px 20px;
  max-width: 800px;
  margin: 0 auto;
}

.log-drawer-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.log-drawer-close {
  background: none;
  border: none;
  color: var(--ink-low);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 0;
}

.log-form-row {
  display: grid;
  grid-template-columns: 1fr 2fr 80px;
  gap: 10px;
  margin-bottom: 10px;
}

@media (max-width: 560px) {
  .log-form-row { grid-template-columns: 1fr; }
}

.log-form-row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}
@media (max-width: 560px) { .log-form-row2 { grid-template-columns: 1fr; } }

/* ── Token prompt ─────────────────────────────────────────────────────────── */
.token-prompt {
  display: none;
  padding: 14px 16px;
  background: var(--amber-dim);
  border: 1px solid var(--amber);
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--ink);
}
.token-prompt.visible { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.token-prompt input {
  flex: 1;
  min-width: 200px;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
}
.token-prompt button {
  padding: 5px 12px;
  border: none;
  border-radius: 6px;
  background: var(--amber);
  color: white;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
}

/* ── Empty state ──────────────────────────────────────────────────────────── */
.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-low);
  font-size: 13px;
}
.empty-icon { font-size: 32px; margin-bottom: 8px; }

/* ── Toasts ───────────────────────────────────────────────────────────────── */
.toast-area {
  position: fixed;
  top: 68px;
  right: 16px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toast {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  animation: slide-in 0.2s ease;
  color: var(--ink);
}
.toast.ok   { border-left: 3px solid var(--green); }
.toast.fail { border-left: 3px solid var(--red); }

@keyframes slide-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Loading spinner ──────────────────────────────────────────────────────── */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--ink-low);
  font-size: 13px;
}

/* ── Syllabus import modal ────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 16px 24px;
  overflow-y: auto;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 640px;
  position: relative;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 18px;
  color: var(--ink);
}

.modal-close {
  background: none;
  border: none;
  color: var(--ink-low);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
  padding: 0;
}
.modal-close:hover { color: var(--ink); }

.modal-hint {
  font-size: 13px;
  color: var(--ink-mid);
  margin-bottom: 14px;
  line-height: 1.5;
}

#modal-step1, #modal-step2 { padding: 20px; }

.modal-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface2);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  min-height: 200px;
  margin-bottom: 14px;
}
.modal-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.modal-actions { display: flex; gap: 8px; }

.modal-preview-wrap {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.modal-preview-wrap table { width: 100%; }
.modal-preview-wrap th { padding: 7px 10px; }
.modal-preview-wrap td { padding: 8px 10px; font-size: 12.5px; }

/* Spinner */
.modal-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  gap: 16px;
  color: var(--ink-mid);
  font-size: 13px;
}

.spinner {
  width: 30px;
  height: 30px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 20px 16px;
  border: 2px dashed var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  text-align: center;
}
.upload-zone:hover,
.upload-zone.drag-over { border-color: var(--purple); background: color-mix(in srgb, var(--purple) 6%, transparent); }
.upload-zone.has-file  { border-color: var(--green);  background: color-mix(in srgb, var(--green)  6%, transparent); }
.upload-icon { font-size: 28px; line-height: 1; }
.upload-label { font-size: 13px; font-weight: 600; color: var(--ink); }
.upload-sub   { font-size: 11px; color: var(--ink-low); }

.modal-or {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0 8px;
  color: var(--ink-low);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.modal-or::before,
.modal-or::after { content: ''; flex: 1; height: 1px; background: var(--border); }

.btn-import-syllabus {
  width: 100%;
  margin-top: 8px;
  padding: 7px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: none;
  color: var(--ink-low);
  font-size: 12px;
  cursor: pointer;
  text-align: center;
  font-family: 'Inter', sans-serif;
  transition: color 0.1s, border-color 0.1s;
}
.btn-import-syllabus:hover { color: var(--purple); border-color: var(--purple); }

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

.mono { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}