:root {
  --ink: #171714;
  --ink-soft: #5c5a54;
  --desk: #242422;
  --desk-edge: #353430;
  --paper: #f3efe6;
  --paper-shadow: #e4dfd3;
  --accent: #b85c1a;
  --accent-hover: #9a4c14;
  --line: #d8d2c6;
  --error: #a83232;
  --mono: "IBM Plex Mono", "Consolas", monospace;
  --serif: "Literata", "Georgia", serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--serif);
  color: var(--ink);
  background: var(--desk);
}

button,
input,
textarea {
  font: inherit;
}

.page-login {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 1.5rem;
  background:
    radial-gradient(circle at 15% 20%, rgba(184, 92, 26, 0.08), transparent 40%),
    var(--desk);
}

.login-shell {
  width: min(100%, 26rem);
}

.login-card {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.35) inset,
    0 18px 40px rgba(0, 0, 0, 0.28);
  padding: 2rem 1.75rem 1.75rem;
}

.login-kicker {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.login-card h1 {
  margin: 0;
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.login-lead {
  margin: 0.55rem 0 1.5rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.45;
}

.login-form {
  display: grid;
  gap: 1rem;
}

.login-form label {
  display: grid;
  gap: 0.35rem;
}

.login-form label span {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.login-form input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.92rem;
}

.login-form input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.form-error {
  margin: 0;
  color: var(--error);
  font-size: 0.88rem;
}

.btn {
  border: 0;
  cursor: pointer;
  padding: 0.62rem 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background 120ms ease, opacity 120ms ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-ghost {
  background: transparent;
  color: #d8d4cb;
  border: 1px solid var(--desk-edge);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.04);
}

.page-app {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--desk-edge);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.brand-name {
  color: #ddd8cf;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.topbar-actions {
  display: flex;
  gap: 0.5rem;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  min-height: 0;
  padding: 1rem;
}

.pane {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 8.5rem);
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
}

.pane-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--paper-shadow);
}

.pane-head h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.pane-head p {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.4;
}

.pane-head-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.meta-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  white-space: nowrap;
}

.data-area {
  width: 100%;
  height: 100%;
  min-height: 20rem;
  padding: 1rem;
  border: 0;
  resize: none;
  background: #fff;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
}

.data-area:focus {
  outline: none;
}

.data-area-output {
  background: #faf8f4;
}

.workspace-divider {
  display: grid;
  place-items: center;
  width: 2.75rem;
  position: relative;
}

.workspace-divider::before {
  content: "";
  position: absolute;
  top: 8%;
  bottom: 8%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--desk-edge), transparent);
}

.divider-label {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: #8a877f;
  background: var(--desk);
  padding: 0.35rem 0;
}

.copy-status {
  margin: 0;
  padding: 0.35rem 1rem 0.75rem;
  min-height: 1.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
}

.footnote {
  padding: 0.65rem 1.25rem 1rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: #7d7970;
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .workspace-divider {
    width: auto;
    height: 2rem;
  }

  .workspace-divider::before {
    top: 50%;
    bottom: auto;
    left: 8%;
    right: 8%;
    width: auto;
    height: 1px;
  }

  .divider-label {
    transform: rotate(90deg);
  }

  .pane {
    min-height: 18rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
}