:root {
  color-scheme: dark;

  /* §2.1 Цвет */
  --color-bg-base: #0b1224;
  --color-bg-elevated: #0e1629;
  --color-surface-panel: rgba(15, 30, 50, 0.85);
  --color-border-subtle: rgba(47, 212, 191, 0.25);
  --color-border-strong: rgba(79, 141, 255, 0.45);
  --color-accent-score: #2fd4bf;
  --color-accent-social: #4f8dff;
  --color-text-primary: #e8eef7;
  --color-text-muted: rgba(232, 238, 247, 0.65);
  --color-text-dim: rgba(232, 238, 247, 0.55);
  --color-code: #2fd4bf;
  --color-danger: #ff6b8a;
  --color-success-soft: rgba(47, 212, 191, 0.12);
  --color-social-tint: rgba(79, 141, 255, 0.15);
  --color-social-tint-border: rgba(79, 141, 255, 0.35);
  --color-input-bg: rgba(11, 18, 36, 0.7);
  --color-card-bg: rgba(11, 18, 36, 0.55);
  --color-tab-bg: rgba(15, 30, 50, 0.45);
  --color-divider: rgba(232, 238, 247, 0.12);
  --color-chip-muted-bg: rgba(232, 238, 247, 0.06);
  --color-chip-muted-border: rgba(232, 238, 247, 0.12);
  --color-ghost-border: rgba(232, 238, 247, 0.25);

  /* §2.2 Типографика */
  --font-sans:
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  --text-h1: clamp(1.75rem, 2.5vw, 2.25rem);
  --text-h2: clamp(1.35rem, 2vw, 1.5rem);
  --text-h3: 1.05rem;
  --text-body: 1rem;
  --text-small: 0.9rem;
  --text-caption: 0.82rem;
  --text-kv-label: 0.78rem;
  --line-height-body: 1.6;
  --line-height-tight: 1.25;

  /* §2.3 Отступы и контейнер */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --container-max: 960px;

  /* §2.4 Радиусы и тени */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-panel: 0 20px 60px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 24px 70px rgba(0, 0, 0, 0.52);

  /* §2.5 Интерактив */
  --duration-fast: 140ms;
  --duration-base: 220ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --focus-ring-color: var(--color-accent-social);
  --focus-ring: 2px solid var(--focus-ring-color);

  /* Обратная совместимость (старые имена) */
  --bg: var(--color-bg-base);
  --panel: var(--color-surface-panel);
  --teal: var(--color-accent-score);
  --blue: var(--color-accent-social);
  --text: var(--color-text-primary);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--line-height-body);
  background:
    radial-gradient(
      circle at 20% 20%,
      rgba(47, 212, 191, 0.12),
      transparent 38%
    ),
    radial-gradient(
      circle at 80% 0%,
      rgba(79, 141, 255, 0.15),
      transparent 40%
    ),
    var(--color-bg-base);
  color: var(--color-text-primary);
}

.canvas {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-8) var(--space-5);
}

.header {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-accent-score);
  text-transform: uppercase;
}

.tag {
  color: var(--color-accent-social);
  font-weight: 600;
}

.panel {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  background: var(--color-surface-panel);
  box-shadow: var(--shadow-panel);
}

h1 {
  margin-top: 0;
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: var(--line-height-tight);
}

h2 {
  font-size: var(--text-h2);
  font-weight: 650;
  line-height: var(--line-height-tight);
}

h3 {
  font-size: var(--text-h3);
  font-weight: 650;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  color: var(--color-code);
}

.footer {
  margin-top: var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-small);
}

.hidden {
  display: none !important;
}

.brand {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-login-slot {
  margin: 0;
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-height: 40px;
}

.header-login-fallback {
  margin: 0;
  max-width: 14rem;
  font-size: var(--text-caption);
  line-height: 1.35;
}

.hero-cta-url {
  margin: var(--space-2) 0 0;
  font-size: var(--text-caption);
  word-break: break-all;
}

.hero-cta-url a {
  color: var(--color-accent-score);
}

.chip {
  display: inline-block;
  padding: var(--space-1) 10px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  background: var(--color-social-tint);
  border: 1px solid var(--color-social-tint-border);
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard);
}

.chip.muted {
  background: var(--color-chip-muted-bg);
  border-color: var(--color-chip-muted-border);
  color: var(--color-text-muted);
}

.login-slot:not(.header-login-slot) {
  margin: var(--space-4) 0 var(--space-2);
  min-height: 44px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0 0;
}

/* Навигация по порталу — акцент social (blue), см. DESIGN_SYSTEM §3.2 */
.tab {
  border: 1px solid var(--color-social-tint-border);
  background: var(--color-tab-bg);
  color: var(--color-text-primary);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  font-weight: 600;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.tab:hover:not(.active):not(:disabled) {
  border-color: var(--color-border-strong);
  background: rgba(79, 141, 255, 0.1);
}

.tab.active {
  border-color: var(--color-accent-social);
  background: rgba(79, 141, 255, 0.18);
  color: var(--color-accent-social);
}

.tab-panel.hidden {
  display: none;
}

.meta-line {
  margin-top: var(--space-5);
}

.kv {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3) var(--space-5);
  margin: var(--space-5) 0 0;
}

.kv div {
  margin: 0;
}

.kv dt {
  font-size: var(--text-kv-label);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-dim);
  margin: 0 0 var(--space-1);
}

.kv dd {
  margin: 0;
  font-weight: 600;
}

.kv .full-width {
  grid-column: 1 / -1;
}

.kv dd.small {
  font-size: var(--text-small);
  font-weight: 400;
}

.hint {
  font-size: var(--text-small);
  line-height: 1.45;
}

.muted {
  color: var(--color-text-muted);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.row.space-between {
  justify-content: space-between;
}

.row.wrap {
  flex-wrap: wrap;
}

.section-heading {
  margin: 0;
}

.panel > h2 {
  margin-top: 0;
}

.search input {
  min-width: 220px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid rgba(47, 212, 191, 0.3);
  background: var(--color-input-bg);
  color: var(--color-text-primary);
  font-family: inherit;
  font-size: inherit;
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.search input:hover:not(:focus-visible):not(:disabled) {
  border-color: rgba(47, 212, 191, 0.45);
}

.search input:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
  border-color: var(--color-border-strong);
}

.table-wrap {
  margin-top: var(--space-4);
  overflow-x: auto;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

table.data th,
table.data td {
  border-bottom: 1px solid var(--color-divider);
  padding: 10px var(--space-2);
  text-align: left;
}

table.data th {
  font-size: var(--text-caption);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-dim);
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: var(--space-4);
}

.card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(47, 212, 191, 0.2);
  background: var(--color-card-bg);
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.card:hover {
  border-color: var(--color-border-subtle);
  box-shadow: var(--shadow-hover);
}

.card h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-h3);
  font-weight: 650;
}

.task-card .task-card-section {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(47, 212, 191, 0.18);
}

.task-card .task-card-section:first-of-type {
  margin-top: var(--space-3);
}

.task-card .task-card-section-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-small);
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.task-card .task-card-section-body {
  margin: 0;
  line-height: 1.55;
  color: var(--color-text-primary);
  font-size: var(--text-small);
  white-space: pre-wrap;
}

.task-card .task-out-meta {
  margin: 0 0 var(--space-2);
  line-height: 1.5;
  font-size: var(--text-small);
  color: var(--color-text-primary);
}

.task-card .task-out-subtitle {
  margin: var(--space-2) 0 var(--space-1);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--color-text-muted);
}

.task-card .task-out-criteria {
  margin-top: 0;
}

.task-card--focused {
  box-shadow:
    0 0 0 2px var(--color-accent-score),
    0 16px 48px rgba(0, 0, 0, 0.38);
  transition: box-shadow 0.35s ease;
}

.card-actions {
  margin-top: var(--space-3);
}

/* Secondary: social (blue); ghost: neutral border */
.btn {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  background: rgba(79, 141, 255, 0.2);
  color: var(--color-text-primary);
  padding: var(--space-2) 14px;
  font-weight: 600;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.btn:hover:not(:disabled) {
  border-color: var(--color-accent-social);
  background: rgba(79, 141, 255, 0.28);
  box-shadow: 0 0 0 1px rgba(79, 141, 255, 0.15);
}

.btn.ghost {
  background: transparent;
  border-color: var(--color-ghost-border);
  box-shadow: none;
}

.btn.ghost:hover:not(:disabled) {
  border-color: var(--color-border-strong);
  background: rgba(79, 141, 255, 0.08);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.announcements {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ann-card {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(79, 141, 255, 0.22);
  background: rgba(11, 18, 36, 0.45);
}

.ann-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--teal);
}

.ann-card p {
  margin: 0;
  line-height: 1.5;
  color: rgba(232, 238, 247, 0.88);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* §4.1 Фокус с клавиатуры */
:focus {
  outline: none;
}

button:focus-visible,
.btn:focus-visible,
.tab:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.lead {
  margin: 0 0 var(--space-4);
  line-height: 1.55;
  color: var(--color-text-muted);
}

.panel-block {
  margin-top: var(--space-5);
}

.panel-block:first-of-type {
  margin-top: var(--space-3);
}

.mechanics-steps {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.mechanics-steps li {
  margin-bottom: var(--space-3);
}

.season-schedule-block.panel-block,
.season-program-block.panel-block {
  margin-top: var(--space-6);
}

.season-schedule-dl.season-schedule-dl--program {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.week-card-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-size: var(--text-small);
}

.week-card-kicker-main {
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-accent-score);
}

.week-open-badge {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  text-align: right;
}

.week-program-loading {
  margin-top: var(--space-4);
}

.season-schedule-card {
  margin-top: var(--space-3);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  background: linear-gradient(165deg, rgba(15, 40, 55, 0.35), var(--color-card-bg));
}

.season-schedule-tz {
  margin: 0 0 var(--space-4);
  font-size: var(--text-small);
}

.season-schedule-lead {
  margin: 0 0 var(--space-3);
  line-height: 1.55;
  color: var(--color-text-muted);
}

.season-schedule-sub {
  margin: var(--space-5) 0 var(--space-2);
  font-size: var(--text-small);
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-accent-score);
}

.season-schedule-note {
  margin: 0 0 var(--space-3);
  font-size: var(--text-small);
  line-height: 1.45;
}

.season-schedule-dl {
  margin: 0;
  display: grid;
  gap: var(--space-4);
}

.season-schedule-dl div {
  display: grid;
  gap: var(--space-1);
}

.season-schedule-dl dt {
  margin: 0;
  font-size: var(--text-kv-label);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.season-schedule-dl dd {
  margin: 0;
  font-size: var(--text-body);
  line-height: 1.45;
  color: var(--color-text-primary);
}

.season-week-open-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.season-week-open-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(79, 141, 255, 0.18);
  background: rgba(79, 141, 255, 0.06);
}

.season-week-n {
  font-weight: 650;
  color: var(--color-text-primary);
}

.season-week-d {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  text-align: right;
}

.week-overview-lead {
  margin: 0 0 var(--space-2);
}

.week-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.week-card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(47, 212, 191, 0.22);
  background: var(--color-card-bg);
}

.week-card-title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-h3);
  font-weight: 650;
}

.week-card-body {
  margin: 0 0 var(--space-3);
  line-height: 1.5;
  color: var(--color-text-muted);
}

.week-card-learn-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-small);
  font-weight: 650;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.week-card-learn {
  margin: 0 0 var(--space-4);
  line-height: 1.55;
  font-size: var(--text-small);
  color: var(--color-text-dim);
}

.week-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

.week-card li {
  margin-bottom: var(--space-3);
}

.week-card .task-desc {
  margin-top: var(--space-2);
  font-size: var(--text-small);
  line-height: 1.45;
  color: var(--color-text-dim);
}

.week-card--compact {
  padding: var(--space-3) var(--space-4);
}

.week-card-body--short {
  margin-bottom: var(--space-2);
  font-size: var(--text-small);
  line-height: 1.45;
}

.week-task-list--compact {
  padding-left: 0;
  list-style: none;
}

.week-task-line {
  margin-bottom: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.week-task-line-id {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-caption);
}

.week-task-line-title {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  line-height: 1.35;
}

.week-card-foot {
  margin: var(--space-3) 0 0;
  font-size: var(--text-caption);
}

.week-task-line--open {
  margin-bottom: var(--space-2);
}

.week-task-jump {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  width: 100%;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(47, 212, 191, 0.28);
  background: rgba(47, 212, 191, 0.06);
  transition:
    background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}

.week-task-jump:hover {
  background: rgba(47, 212, 191, 0.12);
  border-color: rgba(47, 212, 191, 0.45);
}

.week-task-jump:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.02em;
  vertical-align: middle;
}

.pill.ok {
  background: rgba(47, 212, 191, 0.18);
  color: var(--teal);
  border: 1px solid rgba(47, 212, 191, 0.35);
}

.pill.wait {
  background: rgba(255, 180, 80, 0.12);
  color: #f0c080;
  border: 1px solid rgba(255, 180, 80, 0.28);
}

.hero-cta {
  margin-top: var(--space-4);
}

.hero-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  background: linear-gradient(135deg, rgba(47, 212, 191, 0.1), rgba(79, 141, 255, 0.08));
  box-shadow: var(--shadow-panel);
}

.hero-cta-text {
  flex: 1 1 220px;
  min-width: 0;
}

.hero-cta-kicker {
  display: block;
  font-size: 1.05rem;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

.hero-cta-desc {
  margin: 0;
  font-size: var(--text-small);
  line-height: 1.5;
}

.hero-cta-fallback {
  margin: 0;
}

.btn-cta {
  flex-shrink: 0;
  border: 1px solid rgba(47, 212, 191, 0.55);
  background: linear-gradient(180deg, rgba(47, 212, 191, 0.35), rgba(47, 212, 191, 0.15));
  color: var(--color-text-primary);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: 0 0 24px rgba(47, 212, 191, 0.15);
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.btn-cta:hover {
  border-color: var(--color-accent-score);
  background: linear-gradient(180deg, rgba(47, 212, 191, 0.45), rgba(47, 212, 191, 0.22));
  box-shadow: 0 0 28px rgba(47, 212, 191, 0.22);
}

a.btn-cta:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.prizes-section {
  margin-top: var(--space-5);
}

.prizes-intro {
  margin: 0 0 var(--space-4);
  line-height: 1.55;
  color: var(--color-text-muted);
  max-width: 52rem;
}

.prize-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.prize-card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(232, 238, 247, 0.14);
  background: var(--color-card-bg);
}

.prize-card--accent {
  border-color: rgba(47, 212, 191, 0.45);
  background: linear-gradient(160deg, rgba(47, 212, 191, 0.12), var(--color-card-bg));
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.prize-card-title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-h3);
  font-weight: 650;
}

.prize-card-body {
  margin: 0;
  font-size: var(--text-small);
  line-height: 1.5;
  color: var(--color-text-muted);
}

.prizes-footnote {
  margin: var(--space-4) 0 0;
  max-width: 52rem;
}

.fold {
  margin-top: var(--space-6);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-divider);
}

.fold summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-accent-score);
  list-style-position: outside;
}

.fold summary:hover {
  color: var(--color-text-primary);
}

.fold[open] summary {
  margin-bottom: var(--space-3);
}

.fold-schedule .meta-line {
  margin-top: 0;
}

.login-hint-footer {
  margin-top: var(--space-6);
}

.confetti-canvas {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  width: 100vw;
  height: 100vh;
}