:root {
  --page: #EEF1F5;      /* cool desk grey */
  --paper: #FFFFFF;     /* the resume sheet */
  --ink: #1C2230;       /* main text */
  --muted: #5E6675;     /* secondary text */
  --line: #D3D8E0;      /* borders */
  --pencil: #2F55C4;    /* editor's blue pencil accent */
  --error: #B42318;

  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

.site-header {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.site-header h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 8px 0 0;
  max-width: 60ch;
  color: var(--muted);
}

.workspace {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 64px;
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 32px;
  align-items: start;
}

/* ---------- Inputs ---------- */
.inputs {
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 16px 0 6px;
}

label:first-child { margin-top: 0; }

textarea {
  width: 100%;
  padding: 12px;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  resize: vertical;
}

textarea:focus {
  outline: 2px solid var(--pencil);
  outline-offset: 1px;
  border-color: transparent;
}

.hint {
  margin: 10px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
}

#enhanceBtn {
  margin-top: 20px;
  padding: 12px 20px;
  border: none;
  background: var(--pencil);
  color: #fff;
  align-self: flex-start;
}

#enhanceBtn:hover { background: #2446A8; }

#enhanceBtn:disabled {
  background: #8A9BC9;
  cursor: wait;
}

button:focus-visible {
  outline: 2px solid var(--pencil);
  outline-offset: 2px;
}

.error {
  margin: 12px 0 0;
  color: var(--error);
  font-size: 0.9rem;
}

/* ---------- Output sheet ---------- */
.sheet {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--pencil);
  border-radius: 4px;
  padding: 28px 32px;
  min-height: 320px;
}

.sheet-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.sheet h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
}

.secondary {
  padding: 6px 14px;
  background: transparent;
  color: var(--pencil);
  border: 1px solid var(--pencil);
  font-size: 0.85rem;
}

.secondary:hover { background: #EEF2FC; }

.empty {
  color: var(--muted);
  font-style: italic;
  font-family: var(--serif);
}

.results {
  margin: 0;
  padding-left: 1.2em;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.65;
}

.results li { margin-bottom: 10px; }

.results li::marker { color: var(--pencil); }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .workspace { grid-template-columns: 1fr; }
  .site-header { padding-top: 32px; }
  .site-header h1 { font-size: 2rem; }
  .sheet { padding: 20px; }
}