:root {
  --bg: #f6f8fb;
  --bg-soft: #f1f5f9;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #dce4ef;
  --line-strong: #b7c5d8;
  --primary: #0f766e;
  --primary-hover: #0d9488;
  --danger: #b91c1c;
  --danger-hover: #991b1b;
  --chip-key-bg: #e8efff;
  --chip-key-text: #2a4ea0;
  --chip-task-bg: #e6f7ee;
  --chip-task-text: #12673a;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-soft: 0 16px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  color: var(--text);
  font-family: "Inter", "Segoe UI", "Trebuchet MS", "Tahoma", sans-serif;
  background:
    radial-gradient(1200px 500px at 100% -10%, #d7ebe6 0%, transparent 60%),
    radial-gradient(900px 420px at -10% 0%, #dce8f7 0%, transparent 60%),
    linear-gradient(180deg, #f3f7fb 0%, var(--bg) 100%);
}

body.booting #loginScreen,
body.booting #appShell {
  visibility: hidden;
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.login-card {
  width: min(460px, 100%);
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(203, 213, 225, 0.8);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
  padding: 16px;
  display: grid;
  gap: 10px;
}

.login-form {
  display: grid;
  gap: 10px;
}

.remember-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 13px;
  color: #334155;
}

.remember-row input {
  min-height: auto;
  width: auto;
}

.login-error {
  color: #991b1b;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.2;
}

p {
  margin: 0;
}

main {
  max-width: 1220px;
  margin: 0 auto;
  padding: 14px 16px 28px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: var(--shadow-sm);
}

.topbar h1 {
  font-size: 24px;
  letter-spacing: 0.2px;
}

.subtitle {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

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

.tabs {
  display: flex;
  gap: 8px;
  padding: 10px 16px 12px;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  overflow-x: auto;
  position: sticky;
  top: 83px;
  z-index: 35;
}

.tab {
  border: 1px solid var(--line);
  background: #fbfdff;
  color: #304458;
  border-radius: 999px;
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s ease;
}

.tab:hover {
  border-color: #a4c0d2;
  background: #f3f8fc;
}

.tab.active {
  border-color: #78c9bd;
  background: #ddf5f1;
  color: #0d655a;
}

.tab:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.22);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: grid;
  gap: 12px;
  animation: fadeSlideIn .22s ease both;
}

.panel {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(203, 213, 225, 0.8);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
  padding: 12px;
}

.panel-compact {
  padding: 10px;
}

.graph-layout {
  display: grid;
  gap: 12px;
}

.settings-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.lessons-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.graph-columns {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 12px;
}

.inline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 8px;
}

.keydates-grid,
.new-launch-dates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
}

.full-span {
  grid-column: 1 / -1;
}

label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.1px;
  color: var(--muted);
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #dce4ef;
  border-radius: 12px;
  padding: 9px 11px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: #f8fafc;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  min-height: 42px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: #0d9488;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.12);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.22);
}

textarea {
  resize: vertical;
  min-height: 92px;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 8px 0;
  padding: 8px;
}

legend {
  font-size: 12px;
  color: var(--muted);
  padding: 0 4px;
}

.radio-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.radio-row label {
  font-size: 13px;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  color: #304458;
  margin: 0;
}

.row {
  display: flex;
  gap: 6px;
}

.form-actions {
  display: flex;
  align-items: end;
}

.btn {
  border: 1px solid #0f766e;
  background: linear-gradient(135deg, #0f766e, #14b8a6);
  color: #fff;
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(11, 122, 112, 0.28);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.12s ease, box-shadow 0.2s ease;
}

.btn:hover {
  background: linear-gradient(135deg, #0e8077, #10a99a);
  border-color: #0e8077;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(15, 118, 110, 0.28);
}

.btn:active {
  transform: translateY(1px);
}

.btn.secondary {
  background: linear-gradient(180deg, #ffffff 0%, #f2f7fc 100%);
  color: #33475b;
  border-color: var(--line);
  box-shadow: 0 4px 10px rgba(20, 40, 62, 0.08);
}

.btn.secondary:hover {
  background: linear-gradient(180deg, #fcfeff 0%, #eaf2f9 100%);
  border-color: var(--line-strong);
}

.btn.danger {
  background: linear-gradient(180deg, #cc3340 0%, #a61f2a 100%);
  border-color: #a61f2a;
  box-shadow: 0 6px 14px rgba(166, 31, 42, 0.25);
}

.btn.danger:hover {
  background: linear-gradient(180deg, #bf2f3b 0%, #8f1b24 100%);
  border-color: #8f1b24;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.summary {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.chip {
  border: 1px solid var(--line);
  background: #f8fbff;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  white-space: nowrap;
}

.calendar-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 8px 0 10px;
}

.calendar-title {
  min-width: 210px;
  text-align: center;
  font-size: 17px;
  font-weight: 700;
  color: #21384f;
}

.legend-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.legend-chip {
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 700;
}

.legend-key {
  background: var(--chip-key-bg);
  color: var(--chip-key-text);
  border: 1px solid #b8c9f2;
}

.legend-task {
  background: var(--chip-task-bg);
  color: var(--chip-task-text);
  border: 1px solid #9fddb9;
}

.legend-lesson {
  background: #eef2ff;
  color: #3730a3;
  border: 1px solid #c7d2fe;
}

.legend-live {
  background: #fff7ed;
  color: #9a3412;
  border: 1px solid #fed7aa;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(90px, 1fr));
  gap: 6px;
}

.calendar-weekday {
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.calendar-cell {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  min-height: 108px;
  padding: 6px;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  transition: transform 0.14s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.calendar-cell.today {
  border-color: #7aa9d6;
  background: #f3f8ff;
}

.calendar-cell:hover {
  transform: translateY(-1px);
  border-color: #b2c6d8;
  box-shadow: 0 8px 20px rgba(46, 82, 118, 0.08);
}

.calendar-cell.muted {
  background: #fafcff;
  opacity: 0.55;
}

.calendar-cell.selected {
  border-color: #0d7f74;
  box-shadow: 0 0 0 3px rgba(13, 127, 116, 0.18);
}

.calendar-daynum {
  font-size: 12px;
  font-weight: 800;
  color: #243a52;
}

.calendar-chip {
  border-radius: 6px;
  font-size: 11px;
  line-height: 1.2;
  padding: 3px 6px;
}

.calendar-chip.key {
  background: var(--chip-key-bg);
  color: var(--chip-key-text);
}

.calendar-chip.task {
  background: var(--chip-task-bg);
  color: var(--chip-task-text);
}

.calendar-chip.lesson {
  background: #eef2ff;
  color: #3730a3;
}

.calendar-chip.live {
  background: #fff7ed;
  color: #9a3412;
}

.task-list {
  display: grid;
  gap: 10px;
}

.tasks-workspace-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tasks-head-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.tasks-workspace-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 12px;
}

.task-card {
  border-radius: 18px;
  border: 1px solid rgba(190, 205, 223, 0.9);
  background: #fff;
  padding: 12px;
  display: grid;
  gap: 6px;
  cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
}

.task-card:hover {
  border-color: #9db7d4;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.1);
  transform: translateY(-1px);
}

.task-card.active {
  border-color: #0d9488;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.13);
}

.task-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.task-meta-line {
  color: #475569;
  font-size: 12.5px;
}

.task-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.task-detail-panel {
  min-height: 360px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.task-detail-card {
  border-radius: 18px;
  border: 1px solid rgba(190, 205, 223, 0.9);
  background: #fff;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.task-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.task-detail-grid label {
  margin-bottom: 2px;
}

.status-badge {
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid transparent;
  white-space: nowrap;
}

.status-badge.todo {
  background: #e2e8f0;
  color: #334155;
  border-color: #cbd5e1;
}

.status-badge.progress {
  background: #fef3c7;
  color: #92400e;
  border-color: #fcd34d;
}

.status-badge.done {
  background: #dcfce7;
  color: #166534;
  border-color: #86efac;
}

.status-badge.overdue {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}

.team-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.users-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 12px;
}

.team-group {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-soft);
  padding: 10px;
  display: grid;
  gap: 8px;
}

.inline-add-form {
  display: grid;
  gap: 8px;
}

.inline-add-form-role {
  grid-template-columns: minmax(140px, 1fr) auto;
}

.inline-add-form-person {
  grid-template-columns: minmax(140px, 1fr) minmax(120px, 180px) auto;
  gap: 8px;
}

.inline-add-form-person select {
  min-width: 130px;
}

.role-chip {
  border-color: rgba(148, 163, 184, 0.55);
  background: rgba(241, 245, 249, 0.85);
  color: #1f2937;
  font-weight: 600;
}

.task-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  z-index: 97;
}

.task-drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(560px, 100vw);
  background: #fff;
  border-left: 1px solid var(--line);
  box-shadow: -16px 0 36px rgba(15, 23, 42, 0.18);
  z-index: 98;
  display: flex;
  flex-direction: column;
}

.task-drawer-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--line);
}

.task-drawer-form {
  overflow: auto;
  padding: 12px 14px;
  display: grid;
  gap: 10px;
}

.task-drawer-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 10px 14px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.date-mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.date-mode-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 9px;
  background: #f8fafc;
  display: grid;
  gap: 4px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.date-mode-card strong {
  font-size: 13px;
  color: #1e293b;
}

.date-mode-card span {
  font-size: 12px;
  color: #64748b;
}

.date-mode-card input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.date-mode-card.active {
  border-color: #0d9488;
  background: #f0fdfa;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12);
}

.task-advanced-section {
  margin-top: 8px;
}

.task-summary-preview {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: #334155;
  border: 1px dashed #cbd5e1;
  border-radius: 12px;
  background: #f8fafc;
  padding: 10px;
}

.task-row {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  padding: 8px;
}

.empty-state {
  border: 1px dashed #c7d6e4;
  border-radius: 12px;
  background: #f9fcff;
  padding: 14px;
  display: grid;
  gap: 6px;
  justify-items: start;
}

.empty-title {
  font-size: 14px;
  font-weight: 700;
  color: #2d4560;
}

.task-row.compact {
  padding: 7px;
}

.task-row-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 8px;
}

.task-title {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  color: #1d344a;
  white-space: pre-wrap;
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.copy-datetime-btn {
  border: 1px dashed #8fb4cf;
  background: #f3f8ff;
  color: #1f3f5a;
  border-radius: 8px;
  padding: 2px 8px;
  font-size: 12px;
  font-family: "Consolas", "Courier New", monospace;
  cursor: pointer;
  transition: all 0.16s ease;
}

.copy-datetime-btn:hover {
  border-color: #0d9488;
  color: #0f5c55;
  background: #e8fbf7;
}

.copy-datetime-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.18);
}

.task-row-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
}

.task-row-controls .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.task-edit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 6px;
  margin-top: 8px;
}

.task-row .full {
  grid-column: 1 / -1;
}

.task-edit-grid textarea {
  min-height: 66px;
}

.task-edit-collapsed {
  display: none;
}

.task-row.expanded .task-edit-collapsed {
  display: grid;
}

.task-row.mode-relative .edit-abs-field {
  display: none;
}

.task-row.mode-absolute .edit-rel-field {
  display: none;
}

.task-row:not(.expanded) .task-save-btn,
.task-row:not(.expanded) .task-delete-btn {
  display: none;
}

.task-row.expanded .task-toggle-edit-btn {
  background: #eef7ff;
  border-color: #bad5ec;
  color: #2e4f70;
}

.compact-form .form-actions {
  align-items: center;
}

.task-create-form {
  display: grid;
  gap: 8px;
}

.form-block {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  background: var(--bg-soft);
}

.form-block h4 {
  margin: 0 0 6px 0;
  font-size: 13px;
  color: #304b63;
}

.segmented {
  background: #eef5fb;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px;
  gap: 8px;
}

.segmented label {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 12px;
}

.chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.email-items {
  display: grid;
  gap: 6px;
  margin-top: 8px;
}

.email-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 8px;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.email-item:hover {
  background: #f7fbff;
  border-color: var(--line-strong);
}

.email-item.active {
  background: #e8f8f5;
  border-color: #7dcabf;
}

.emails-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 10px;
}

.email-preview-wrap {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: #f8fbff;
}

.email-preview-wrap h4 {
  margin: 0 0 8px 0;
  font-size: 13px;
  color: #375271;
}

.email-html-preview {
  background: #fff;
  border: 1px dashed #c5d4e4;
  border-radius: 10px;
  padding: 10px;
  min-height: 100px;
  overflow: auto;
}

.module-group {
  margin-bottom: 10px;
}

.module-group-title {
  font-size: 12px;
  font-weight: 700;
  color: #335677;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin: 0 0 6px 4px;
}

.link {
  color: #1162be;
  text-decoration: none;
}

.link:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

.toast-stack {
  position: fixed;
  right: 14px;
  bottom: 14px;
  display: grid;
  gap: 8px;
  z-index: 90;
  pointer-events: none;
}

.toast {
  background: #102a43;
  color: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  box-shadow: var(--shadow-md);
  animation: fadeSlideIn .18s ease both;
}

.toast-hide {
  opacity: 0;
  transform: translateY(4px);
  transition: all .2s ease;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: grid;
  place-items: center;
  z-index: 95;
  padding: 14px;
}

.modal-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  width: min(480px, 100%);
  padding: 14px;
  display: grid;
  gap: 10px;
}

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

@media (max-width: 1080px) {
  .settings-layout {
    grid-template-columns: 1fr;
  }

  .lessons-layout {
    grid-template-columns: 1fr;
  }

  .graph-columns {
    grid-template-columns: 1fr;
  }

  .tasks-workspace-grid {
    grid-template-columns: 1fr;
  }

  .team-section {
    grid-template-columns: 1fr;
  }

  .emails-layout {
    grid-template-columns: 1fr;
  }

  .users-layout {
    grid-template-columns: 1fr;
  }

  .calendar-grid {
    grid-template-columns: repeat(7, minmax(70px, 1fr));
  }
}

@media (max-width: 860px) {
  .topbar {
    flex-direction: column;
    gap: 10px;
  }

  .tabs {
    top: 122px;
  }

  .calendar-grid {
    grid-template-columns: repeat(2, minmax(130px, 1fr));
  }

  .calendar-weekday {
    display: none;
  }

  .tasks-workspace-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .task-detail-grid {
    grid-template-columns: 1fr;
  }

  .inline-add-form {
    grid-template-columns: 1fr;
  }

  .date-mode-cards {
    grid-template-columns: 1fr;
  }

  .task-drawer {
    width: 100vw;
  }
}