:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --panel: #ffffff;
  --line: #e2e5e9;
  --text: #25282d;
  --muted: #69717c;
  --accent: #2f6fed;
  --accent-dark: #1f56c4;
  --danger: #ad3b3b;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; background: var(--bg); color: var(--text); }
body { line-height: 1.5; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }

.shell { width: min(960px, 100%); margin: 0 auto; padding: 24px 16px 48px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 8px 30px rgba(25, 35, 50, .05); }
.auth-panel { width: min(420px, 100%); margin: 8vh auto 0; padding: 28px; }
h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(1.35rem, 2vw, 1.75rem); margin-bottom: 4px; }
h2 { font-size: 1.2rem; margin-bottom: 4px; }
.muted { color: var(--muted); }
.eyebrow { color: var(--accent-dark); font-size: .85rem; font-weight: 650; letter-spacing: .03em; }
.message { min-height: 1.5em; color: var(--danger); margin: 12px 0 0; }
.message.success { color: #267345; }

label { display: block; font-size: .9rem; font-weight: 600; margin: 14px 0 6px; }
input, select, textarea { width: 100%; border: 1px solid #cbd1d8; border-radius: 10px; background: #fff; color: var(--text); padding: 10px 12px; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 3px solid rgba(47, 111, 237, .22); outline-offset: 2px; }
textarea { resize: vertical; min-height: 96px; }

.primary, .secondary, .quiet { border-radius: 10px; padding: 9px 14px; border: 1px solid transparent; }
.primary { background: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-dark); }
.secondary { background: #eef3ff; color: var(--accent-dark); border-color: #cbd9ff; }
.quiet { background: transparent; color: var(--accent-dark); border-color: var(--line); }
.auth-panel .primary { width: 100%; margin-top: 18px; }

.topbar, .section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.button-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.topbar { padding: 4px 2px 20px; }
.topbar h1 { margin-bottom: 0; }
.topbar p { margin-bottom: 0; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; overflow-x: auto; }
.tab { flex: 0 0 auto; border: 0; border-bottom: 3px solid transparent; padding: 10px 14px; background: transparent; color: var(--muted); }
.tab.active { color: var(--accent-dark); border-bottom-color: var(--accent); font-weight: 700; }
.view-panel { padding: 22px; }
.control-row { display: grid; grid-template-columns: 1fr 140px; gap: 10px; margin: 18px 0 10px; }
.status { color: var(--muted); min-height: 2em; padding: 12px 0; }
.card-list { display: grid; gap: 10px; }
.item-card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; background: #fff; }
.item-card h3 { font-size: 1rem; margin: 0 0 4px; overflow-wrap: anywhere; }
.item-card p { margin: 2px 0; overflow-wrap: anywhere; }
.item-meta { color: var(--muted); font-size: .88rem; }
#library-more { margin-top: 14px; }
.review-card { border: 1px solid var(--line); border-radius: 12px; padding: 18px; margin-top: 14px; }
.prompt { font-size: clamp(1.25rem, 3vw, 1.7rem); font-weight: 650; overflow-wrap: anywhere; margin: 10px 0 18px; }
.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 8px 0 18px; }
.summary-cell { border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.summary-cell strong { display: block; font-size: 1.2rem; }
.summary-cell span { color: var(--muted); font-size: .82rem; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 560px) {
  .shell { padding: 14px 10px 32px; }
  .auth-panel { margin-top: 4vh; padding: 20px; }
  .view-panel { padding: 16px; }
  .topbar, .section-heading { gap: 10px; }
  .topbar .quiet, .section-heading .quiet { flex: 0 0 auto; }
  .section-heading { flex-wrap: wrap; }
  .button-row { width: 100%; justify-content: stretch; }
  .button-row button { flex: 1 1 150px; min-width: 0; }
  .control-row { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .tab { padding-inline: 10px; }
}