:root {
  color-scheme: light dark;
  --app-bg: var(--tg-theme-bg-color, #f4f6f8);
  --app-section: var(--tg-theme-secondary-bg-color, #ffffff);
  --app-text: var(--tg-theme-text-color, #17212b);
  --app-muted: var(--tg-theme-hint-color, #6f7d8c);
  --app-link: var(--tg-theme-link-color, #2f80ed);
  --app-button: var(--tg-theme-button-color, #2f80ed);
  --app-button-text: var(--tg-theme-button-text-color, #ffffff);
  --app-border: color-mix(in srgb, var(--app-muted), transparent 72%);
  --danger: #d84b4b;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--app-bg);
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--app-bg);
  color: var(--app-text);
}

button,
input {
  font: inherit;
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: var(--app-button);
  color: var(--app-button-text);
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.6;
}

.shell {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 14px max(28px, env(safe-area-inset-bottom));
}

.topbar {
  margin-bottom: 14px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--app-muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 28px;
  line-height: 1.1;
}

.lead {
  max-width: 560px;
  margin-top: 8px;
  color: var(--app-muted);
  font-size: 15px;
  line-height: 1.4;
}

h2 {
  font-size: 18px;
  line-height: 1.2;
}

.panel {
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-section);
}

.panel {
  margin-top: 10px;
  padding: 14px;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-heading p {
  margin-top: 4px;
  color: var(--app-muted);
  font-size: 13px;
}

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

.field-label {
  color: var(--app-muted);
  font-size: 13px;
  font-weight: 700;
}

.input-action {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 88px;
  gap: 8px;
}

input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  background: var(--app-bg);
  color: var(--app-text);
  padding: 0 12px;
  outline: 0;
}

input:focus {
  border-color: var(--app-link);
}

.channel-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 56px;
  border: 1px solid var(--app-border);
  border-radius: 8px;
  padding: 10px;
}

.channel-main {
  min-width: 0;
}

.channel-title {
  display: block;
  overflow: hidden;
  color: var(--app-text);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.remove-button {
  min-width: 82px;
  background: color-mix(in srgb, var(--danger), transparent 88%);
  color: var(--danger);
}

.empty {
  border: 1px dashed var(--app-border);
  border-radius: 8px;
  padding: 18px 12px;
  color: var(--app-muted);
  text-align: center;
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.preset-row button {
  background: color-mix(in srgb, var(--app-button), transparent 88%);
  color: var(--app-button);
}

.preset-row button.is-selected {
  background: var(--app-button);
  color: var(--app-button-text);
}

.message {
  min-height: 22px;
  margin-top: 12px;
  color: var(--app-muted);
  font-size: 14px;
  text-align: center;
}

.message.error {
  color: var(--danger);
}

@media (max-width: 480px) {
  .input-action {
    grid-template-columns: 1fr;
  }
}