:root {
  color-scheme: light;
  --ink: #1e252b;
  --muted: #66727d;
  --line: #d8dee4;
  --panel: #ffffff;
  --canvas: #f3f5f7;
  --accent: #177245;
  --accent-strong: #0f5f38;
  --warn: #a64212;
  --bad: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--canvas);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

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

.app {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0;
}

p {
  margin: 6px 0 0;
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  padding-top: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

form.panel {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

label {
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #c7d0d9;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 11px 12px;
  outline: none;
  font-size: 16px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(23, 114, 69, 0.14);
}

textarea {
  min-height: 190px;
  resize: vertical;
  line-height: 1.55;
}

.meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

.attachment-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.attachment-row span,
.message-item small,
.history-item small {
  overflow-wrap: anywhere;
}

.attachment-row button {
  min-height: 36px;
  padding: 0 12px;
}

.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
}

.toggles label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.toggles input {
  width: 18px;
  height: 18px;
}

.actions {
  display: grid;
  grid-template-columns: auto 1fr auto;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

#sendButton {
  grid-column: 1;
}

#saveButton {
  grid-column: 3;
}

button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 0 16px;
  cursor: pointer;
}

button:hover {
  border-color: #aab6c2;
}

button[type="submit"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

button[type="submit"]:hover {
  background: var(--accent-strong);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

#reloadButton {
  width: 42px;
  padding: 0;
  font-size: 22px;
}

output {
  min-height: 22px;
  color: var(--muted);
  font-weight: 600;
}

output.ok {
  color: var(--accent-strong);
}

output.bad {
  color: var(--bad);
}

.side {
  display: grid;
  align-content: start;
  gap: 18px;
}

.side-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.side-tabs button {
  min-height: 40px;
  padding: 0 10px;
}

.side-tabs button.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.side-page {
  display: none;
}

.side-page.active {
  display: grid;
  gap: 12px;
}

.history-head {
  display: grid;
  gap: 10px;
}

.history-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.history-tabs button {
  min-height: 34px;
  padding: 0 8px;
  font-size: 13px;
}

.history-tabs button.active {
  border-color: var(--accent);
  background: rgba(23, 114, 69, 0.1);
  color: var(--accent-strong);
  font-weight: 700;
}

.message-list,
.history-list {
  display: grid;
  gap: 8px;
}

.message-item,
.history-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 11px;
  background: #fafbfc;
  text-align: left;
  overflow: hidden;
}

.message-item {
  width: 100%;
  min-height: auto;
  color: var(--ink);
}

.message-item strong,
.history-item strong {
  display: block;
  margin-bottom: 4px;
}

.message-item p,
.history-item p {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.message-item small,
.history-item small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.history-item.fail {
  border-color: #efb5af;
  background: #fff8f7;
}

.history-item:not(.fail) {
  border-color: #b9dec9;
}

.warn {
  color: var(--warn);
}

@media (max-width: 860px) {
  .app {
    width: 100%;
    padding: 0 0 18px;
  }

  .topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    align-items: flex-start;
    background: rgba(243, 245, 247, 0.96);
    border-bottom: 1px solid var(--line);
    padding: 14px 12px 12px;
    backdrop-filter: blur(10px);
  }

  .workspace {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 12px;
  }

  h1 {
    font-size: 21px;
    line-height: 1.25;
  }

  p {
    font-size: 14px;
  }

  .panel {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
    padding: 14px 12px;
  }

  form.panel {
    gap: 14px;
  }

  input,
  select,
  textarea {
    min-height: 48px;
    padding: 13px 12px;
  }

  textarea {
    min-height: 170px;
  }

  .toggles {
    display: grid;
    gap: 10px;
  }

  .toggles label {
    min-height: 44px;
    padding: 8px 0;
  }

  .toggles input {
    width: 22px;
    height: 22px;
  }

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

  #sendButton,
  #saveButton {
    grid-column: 1;
  }

  #saveButton {
    margin-top: 8px;
    background: #fafbfc;
  }

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

  button {
    min-height: 50px;
    width: 100%;
  }

  #reloadButton {
    flex: 0 0 46px;
    width: 46px;
    min-height: 46px;
  }

  .side {
    gap: 14px;
  }

  .message-item,
  .history-item {
    padding: 12px;
  }
}