:root {
  color-scheme: dark;
  --bg: #111827;
  --bg-grid: rgba(255, 255, 255, 0.05);
  --card: #1f2937;
  --text: #f9fafb;
  --muted: #9ca3af;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --danger: #ef4444;
  --danger-strong: #dc2626;
  --border: #374151;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px), linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text);
}

button,
input,
textarea,
select {
  font: inherit;
}

.app-shell {
  max-width: 430px;
  min-height: 100vh;
  margin: 0 auto;
  background: linear-gradient(180deg, #1f2937 0%, var(--bg) 100%);
  display: flex;
  flex-direction: column;
  position: relative;
  padding-bottom: 80px;
}

.topbar {
  background: linear-gradient(135deg, #111827 0%, #24324d 100%);
  color: white;
  padding: 18px 20px 22px;
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.18);
}

.topbar__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  opacity: 0.78;
  margin: 0 0 4px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.content {
  padding: 16px 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tab-panel {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.tab-panel.active {
  display: flex;
}

.card,
.section-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 16px;
  color: #f9fafb;
}

.panel-hero {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #f3f8ff 0%, #ffffff 100%);
  color: #111827;
}

.panel-hero__icon {
  font-size: 1.5rem;
  background: #e7f1ff;
  color: #111827;
  border-radius: 14px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
}

.action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

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

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 8px 20px rgba(47, 128, 237, 0.18);
}

.btn-primary:hover {
  background: var(--primary-strong);
}

.btn-secondary {
  background: #1e3a8a;
  color: #dbeafe;
}

.btn-danger {
  background: #ffe5e5;
  color: var(--danger-strong);
}

.btn.small {
  padding: 8px 12px;
  font-size: 0.9rem;
}

.btn.full {
  width: 100%;
}

.tg-gate {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px), linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 24px 24px;
}

.tg-gate[hidden] {
  display: none;
}

.tg-gate__card {
  max-width: 360px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}

.tg-gate__text {
  color: var(--muted);
  line-height: 1.5;
}

.tg-gate__hint {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

.form-hint {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--primary);
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.4;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.stat-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  background: #18212f;
}

.stat-card strong {
  display: block;
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.account-item,
.lesson-item,
.option-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  background: #18212f;
  color: #d1d5db;
}

.account-item__head,
.section-card__header,
.lesson-item__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-soft {
  background: #f3f4f6;
  color: #111827;
}

.badge.success {
  background: #dcfce7;
  color: #166534;
}

.badge.warn {
  background: #fef3c7;
  color: #92400e;
}

.form-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 600;
  color: #d1d5db;
}

input,
textarea,
select {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: white;
  color: #111827;
}

textarea {
  resize: vertical;
}

.limits-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.limits-grid > div {
  border-radius: 14px;
  background: #f9fbff;
  border: 1px solid var(--border);
  padding: 10px;
  color: #111827;
}

.list {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
}

.empty-state {
  border: 1px dashed var(--border);
  border-radius: 16px;
  padding: 18px;
  text-align: center;
  background: #18212f;
  color: #d1d5db;
}

.empty-state h3 {
  margin-bottom: 6px;
  color: #f9fafb;
}

.empty-state .btn {
  margin-top: 10px;
}

.notice {
  background: #fff4f4;
  color: #b42318;
  border: 1px solid #fecaca;
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
  font-size: 0.95rem;
  font-weight: 600;
}

.bottom-nav {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  box-sizing: border-box;
  z-index: 1000;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
  background: rgba(17, 24, 39, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(55, 65, 81, 0.9);
}

.nav-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 8px 2px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
}

.nav-btn.active {
  background: #1e3a8a;
  color: #dbeafe;
}

@media (max-width: 420px) {
  .bottom-nav {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 4px;
  }

  .nav-btn {
    font-size: 0.68rem;
    padding: 8px 1px;
  }

  .action-row {
    grid-template-columns: 1fr;
  }
}

/* --- Модальное окно деталей аккаунта --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(3, 7, 18, 0.72);
  backdrop-filter: blur(4px);
  animation: modal-fade 0.16s ease;
}

.modal-card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: modal-pop 0.18s ease;
}

.modal-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.modal-card__eyebrow {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 4px;
}

.modal-card__title {
  font-size: 1.25rem;
  color: var(--text);
}

.modal-close {
  border: none;
  background: #18212f;
  color: var(--muted);
  width: 32px;
  height: 32px;
  border-radius: 999px;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background: var(--danger);
  color: white;
}

.modal-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.modal-meta__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  background: #18212f;
}

.modal-meta__label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.modal-meta__value {
  font-weight: 700;
}

.modal-meta__value.is-on {
  color: #4ade80;
}

.modal-meta__value.is-off {
  color: #fbbf24;
}

.modal-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 600;
  color: #d1d5db;
}

.modal-field textarea {
  width: 100%;
  min-height: 120px;
  line-height: 1.5;
}

.modal-field__hint {
  font-weight: 500;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.modal-delay {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-delay input {
  width: 100%;
  text-align: center;
}

.modal-delay__sep {
  color: var(--muted);
  font-weight: 700;
  flex-shrink: 0;
}

.modal-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

@keyframes modal-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modal-pop {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}