:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #18202a;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #3346d3;
  --accent-strong: #2434a8;
  --danger: #b42318;
  --radius: 16px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(8px); }
.site-header-inner { max-width: 1120px; margin: 0 auto; padding: 12px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-weight: 800; letter-spacing: -.02em; }
.nav { display: flex; gap: 8px; align-items: center; }
.nav a { padding: 8px 10px; border-radius: 10px; color: var(--muted); }
.nav a:hover { background: var(--bg); color: var(--text); }
main { max-width: 1120px; margin: 0 auto; padding: 28px 20px 64px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -.035em; }
h2 { margin: 0; }
.eyebrow { margin: 0 0 6px; text-transform: uppercase; letter-spacing: .08em; font-size: .72rem; font-weight: 800; color: var(--accent); }
.muted { color: var(--muted); margin: 8px 0 0; }
.button { border: 0; border-radius: 11px; padding: 10px 14px; font: inherit; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.button.primary { background: var(--accent); color: white; }
.button.primary:hover { background: var(--accent-strong); }
.button.secondary { background: #eef0ff; color: #2939b2; }
.button.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.button.danger { color: var(--danger); }
.card-form, .empty-state, .card-row, .filter-bar { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.card-form { padding: 22px; display: grid; gap: 18px; }
.field { display: grid; gap: 7px; min-width: 0; }
.field > span, .field > label { font-size: .88rem; font-weight: 700; }
.field b { color: var(--danger); }
input, textarea, select { width: 100%; border: 1px solid #d0d5dd; border-radius: 11px; padding: 11px 12px; font: inherit; color: var(--text); background: white; outline: none; }
textarea { resize: vertical; line-height: 1.5; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(51,70,211,.12); }
.field-main textarea { font-size: 1.05rem; }
.quick-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.file-field, .check-pill, .keep-context { border: 1px solid var(--line); border-radius: 11px; padding: 9px 12px; background: #fafafa; font-size: .9rem; }
.file-field input[type=file] { border: 0; padding: 0; margin-top: 7px; font-size: .8rem; }
.check-pill { display: inline-flex; align-items: center; gap: 7px; }
.check-pill input, .keep-context input, .filter-bar input[type=checkbox] { width: auto; }
.optional { border-top: 1px solid var(--line); padding-top: 14px; }
.optional summary { cursor: pointer; font-weight: 800; }
.optional-grid { margin-top: 16px; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.span-2 { grid-column: span 2; }
.form-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.shortcut { font-size: .82rem; color: var(--muted); margin-left: auto; }
.alert { margin-bottom: 14px; padding: 12px 14px; border-radius: 12px; background: #fef3f2; color: #912018; border: 1px solid #fecdca; }
.filter-bar { padding: 12px; margin-bottom: 16px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.filter-bar input[type=search] { flex: 1; min-width: 240px; }
.filter-bar label { display: inline-flex; gap: 6px; align-items: center; font-size: .9rem; color: var(--muted); }
.cards-list { display: grid; gap: 10px; }
.card-row { padding: 16px; display: flex; justify-content: space-between; align-items: center; gap: 18px; }
.card-row-main { min-width: 0; }
.card-row h2 { font-size: 1rem; margin: 7px 0 5px; }
.card-row p { margin: 0; color: var(--muted); font-size: .9rem; }
.tags { display: flex; gap: 5px; flex-wrap: wrap; }
.tags span { font-size: .7rem; padding: 3px 7px; border-radius: 999px; background: #f2f4f7; color: #475467; }
.row-actions { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.empty-state { padding: 44px 20px; text-align: center; }
.empty-state p { color: var(--muted); }
.logout-form { margin: 0; }
@media (max-width: 720px) {
  main { padding: 20px 14px 48px; }
  .site-header-inner { padding: 10px 14px; }
  .nav .desktop-only { display: none; }
  .page-head { align-items: center; }
  .optional-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .card-form { padding: 16px; }
  .card-row { align-items: flex-start; flex-direction: column; }
  .row-actions { width: 100%; }
  .shortcut { width: 100%; margin-left: 0; }
}

.login-shell { max-width: 460px; margin: 8vh auto 0; }
.login-form { margin-top: 18px; }
.login-form label { display: grid; gap: 6px; font-weight: 700; }

/* Review */
.review-shell { max-width: 900px; margin: 0 auto; }
.review-topbar { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 16px; }
.review-topbar strong { font-size: .9rem; color: var(--muted); }
.review-card { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: clamp(20px, 4vw, 40px); box-shadow: 0 12px 36px rgba(16,24,40,.06); }
.review-tags { margin-bottom: 24px; }
.review-front { min-height: 180px; display: grid; align-content: center; gap: 22px; }
.review-copy { font-size: clamp(1.2rem, 2.8vw, 1.75rem); line-height: 1.55; font-weight: 650; letter-spacing: -.015em; }
.review-media { display: grid; gap: 12px; }
.review-media img { display: block; max-width: 100%; max-height: 52vh; width: auto; margin: 0 auto; border-radius: 14px; border: 1px solid var(--line); object-fit: contain; }
.reveal-answer { width: 100%; margin-top: 24px; min-height: 52px; }
kbd { font: inherit; font-size: .75em; border: 1px solid currentColor; border-radius: 5px; padding: 1px 5px; opacity: .72; }
.review-answer { margin-top: 28px; padding-top: 6px; }
.answer-divider { color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-weight: 850; font-size: .72rem; border-top: 1px solid var(--line); padding-top: 22px; margin-bottom: 15px; }
.review-note { margin-top: 20px; padding: 14px; border-radius: 12px; background: #f8f9fc; color: #475467; line-height: 1.5; }
.review-ratings { margin-top: 28px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; }
.rating-button { min-height: 70px; border-radius: 13px; border: 1px solid var(--line); background: #fff; cursor: pointer; display: grid; place-items: center; gap: 3px; padding: 9px; font: inherit; font-weight: 800; color: var(--text); }
.rating-button small { font-weight: 650; color: var(--muted); }
.rating-button:disabled { opacity: .42; cursor: not-allowed; }
.rating-button:not(:disabled):hover { border-color: #98a2b3; transform: translateY(-1px); }
.rating-1:not(:disabled) { background: #fff5f4; border-color: #fecdca; color: #b42318; }
.rating-2:not(:disabled) { background: #fffaeb; border-color: #fedf89; color: #b54708; }
.rating-3:not(:disabled) { background: #f0f9ff; border-color: #b9e6fe; color: #026aa2; }
.rating-4:not(:disabled) { background: #ecfdf3; border-color: #abefc6; color: #067647; }
.review-empty { max-width: 700px; margin: 8vh auto 0; }
@media (max-width: 650px) {
  .review-card { padding: 18px; border-radius: 16px; }
  .review-ratings { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-topbar { align-items: flex-start; }
  .review-copy { font-size: 1.18rem; }
}

/* Dashboard and settings */
.metric-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 12px; margin-bottom: 18px; }
.metric-card, .dashboard-panel, .settings-form { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.metric-card { padding: 17px; display: grid; gap: 5px; min-height: 112px; align-content: center; }
.metric-card span { color: var(--muted); font-size: .82rem; font-weight: 700; }
.metric-card strong { font-size: 2rem; letter-spacing: -.04em; }
.metric-card small { color: var(--muted); }
a.metric-card:hover { border-color: #b8c0cc; transform: translateY(-1px); }
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.dashboard-panel { padding: 20px; }
.panel-head { margin-bottom: 13px; }
.panel-head h2 { font-size: 1.08rem; }
.study-modes, .weak-list { display: grid; gap: 8px; }
.study-modes a, .weak-list a { border: 1px solid var(--line); border-radius: 12px; padding: 13px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.study-modes a { display: grid; }
.study-modes span, .weak-list small { display: block; color: var(--muted); font-size: .82rem; margin-top: 3px; }
.study-modes a:hover, .weak-list a:hover { background: #fafbfc; }
.weak-list b { color: var(--accent); }
.settings-form { max-width: 680px; padding: 22px; display: grid; gap: 20px; }
.settings-form small { color: var(--muted); line-height: 1.45; }
.success-alert { background: #ecfdf3; color: #067647; border-color: #abefc6; }
@media (max-width: 850px) { .metric-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } .dashboard-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .metric-grid { grid-template-columns: 1fr 1fr; } .metric-card { min-height: 96px; padding: 14px; } }

/* Export */
.export-panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: grid; gap: 22px; }
.export-filters { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; align-items: end; }
.export-summary { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 18px 0; display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; }
.export-summary strong { font-size: 1.25rem; }
.export-summary span { color: var(--muted); }
.export-action { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.export-action small { color: var(--muted); }
@media (max-width:650px) { .export-filters { grid-template-columns:1fr; } .export-filters .span-2 { grid-column:auto; } }

/* Clipboard image paste */
.paste-zone { position: relative; }
.paste-hint { color: var(--muted); font-size: .8rem; font-weight: 600 !important; }
.paste-image-input { display: none !important; }
.paste-previews { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.paste-previews:empty { display: none; }
.paste-preview { margin: 0; border: 1px solid var(--line); border-radius: 12px; padding: 8px; background: #fafafa; display: grid; gap: 6px; }
.paste-preview img { width: 100%; height: 120px; object-fit: contain; border-radius: 8px; background: white; }
.paste-preview figcaption { color: var(--muted); font-size: .72rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.paste-remove { border: 0; background: transparent; color: var(--danger); font: inherit; font-size: .76rem; font-weight: 700; cursor: pointer; justify-self: start; padding: 0; }
.paste-preview.existing .paste-remove { display: none; }
.review-media-answer { margin-top: 18px; }
.review-ratings.is-submitting { pointer-events: none; opacity: .72; }
.review-complete-alert { margin-bottom: 18px; padding: 13px 15px; border: 1px solid #abefc6; border-radius: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
@media (max-width: 520px) { .paste-previews { grid-template-columns: repeat(2, minmax(0, 1fr)); } }