/* =========================================================
   Vocabulary — paper & ink design system
   Warm paper, deep ink, terracotta accent, editorial type.
   ========================================================= */

:root {
  --paper: #f5efe3;
  --paper-deep: #efe5d4;
  --surface: #fffcf5;
  --surface-soft: #fbf5e9;
  --ink: #1d2b27;
  --ink-2: #34443e;
  --muted: #65716a;
  --line: #ddd2bf;
  --line-strong: #c8baa3;
  --accent: #b14a2f;
  --accent-deep: #8d3722;
  --accent-soft: #f3e2da;
  --sage: #5c7a68;
  --sage-deep: #3f5e4d;
  --sage-soft: #e8efe8;
  --gold: #a47a36;
  --gold-soft: #f6ecd8;

  --bg: var(--paper);
  --text: var(--ink);
  --primary: var(--accent);
  --primary-dark: var(--accent-deep);
  --border: var(--line);

  --danger: #a33a2a;
  --danger-bg: #f8e5df;
  --success: #3f6b52;
  --success-bg: #e9f0e8;
  --warning: #8a6420;
  --warning-bg: #f8eed8;

  --radius: 18px;
  --radius-sm: 12px;
  --shadow:
    0 26px 60px -44px rgba(29, 43, 39, 0.5),
    0 2px 0 rgba(255, 255, 255, 0.55) inset;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia,
    "Songti SC", "Noto Serif SC", "SimSun", serif;
  --sans: "Avenir Next", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(1100px 620px at 8% -12%, rgba(177, 74, 47, 0.07), transparent 58%),
    radial-gradient(900px 520px at 100% 0%, rgba(92, 122, 104, 0.08), transparent 54%),
    linear-gradient(180deg, #f7f1e6 0%, var(--paper) 62%, #f2eadc 100%);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.28;
  background-image: radial-gradient(rgba(29, 43, 39, 0.12) 0.55px, transparent 0.55px);
  background-size: 5px 5px;
}

::selection {
  background: var(--accent);
  color: #fff;
}

a {
  color: var(--accent-deep);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

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

img {
  max-width: 100%;
}

.topbar,
.page,
.login-page {
  position: relative;
  z-index: 1;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 239, 227, 0.86);
  border-bottom: 1px solid rgba(29, 43, 39, 0.12);
  backdrop-filter: blur(14px) saturate(1.1);
}

.topbar-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}

.brand::before {
  content: "V";
  display: inline-grid;
  place-items: center;
  width: 31px;
  height: 31px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 17px;
  font-style: italic;
  font-weight: 500;
  line-height: 1;
  padding-left: 1px;
}

.brand:hover {
  color: var(--accent-deep);
  text-decoration: none;
}

.nav {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 2px;
}

.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  transition:
    color 0.18s ease,
    background 0.18s ease;
}

.nav a:hover {
  color: var(--ink);
  background: rgba(29, 43, 39, 0.05);
  text-decoration: none;
}

.nav a.active {
  color: var(--accent-deep);
  background: rgba(177, 74, 47, 0.09);
  box-shadow: inset 0 0 0 1px rgba(177, 74, 47, 0.09);
}

/* ---------- page frame ---------- */

.page {
  padding: 46px 0 78px;
}

.narrow {
  width: min(900px, calc(100% - 40px));
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 32px;
  margin-bottom: 30px;
  padding: 6px 0 32px;
  border-bottom: 1px solid var(--line);
}

.hero::after {
  content: "Aa";
  position: absolute;
  top: -54px;
  right: 0;
  z-index: 0;
  color: rgba(29, 43, 39, 0.045);
  font-family: var(--serif);
  font-size: 190px;
  font-weight: 500;
  letter-spacing: -0.08em;
  line-height: 1;
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-deep);
  font-size: 10.5px;
  font-weight: 750;
  letter-spacing: 0.2em;
  line-height: 1.5;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 680px;
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.12;
  text-wrap: balance;
}

.hero p:not(.eyebrow) {
  max-width: 570px;
  margin: 0;
  color: var(--muted);
  font-size: 15.5px;
}

.hero .row {
  align-self: end;
  margin-bottom: 6px;
}

.page-title {
  margin: 0 0 5px;
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.page-subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 720px;
}

/* ---------- cards & grids ---------- */

.card {
  position: relative;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 20px;
}

.card h2,
.card h3 {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.card h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
}

.card h2::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  flex: 0 0 18px;
  background: var(--accent);
}

.card h3 {
  font-size: 18px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat {
  position: relative;
  overflow: hidden;
  padding: 22px 24px 24px;
  background: linear-gradient(155deg, #fffdf8 0%, #f9f2e5 100%);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 18px 34px -34px rgba(29, 43, 39, 0.55);
}

.stat::before {
  content: "";
  display: block;
  width: 34px;
  height: 2px;
  margin-bottom: 16px;
  background: var(--accent);
}

.stat::after {
  content: "";
  position: absolute;
  right: -32px;
  bottom: -48px;
  width: 124px;
  height: 124px;
  border: 1px solid rgba(177, 74, 47, 0.12);
  border-radius: 50%;
}

.stat .label {
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.55;
  text-transform: uppercase;
}

.stat .value {
  margin-top: 8px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(36px, 4.2vw, 46px);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(29, 43, 39, 0.06);
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.01em;
  line-height: 1.35;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease,
    transform 0.18s ease,
    box-shadow 0.18s ease;
}

.btn:hover {
  background: rgba(29, 43, 39, 0.1);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn:focus-visible,
.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible,
.chip:focus-visible,
.option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 12px 22px -14px rgba(177, 74, 47, 0.9);
}

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

.btn-secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink-2);
}

.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--ink-2);
  color: var(--ink);
}

.btn-danger {
  background: transparent;
  border-color: rgba(163, 58, 42, 0.3);
  color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger-bg);
  border-color: rgba(163, 58, 42, 0.45);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  padding: 8px 10px;
}

.btn-ghost:hover {
  background: rgba(29, 43, 39, 0.045);
  color: var(--ink);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12.5px;
}

/* ---------- forms ---------- */

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.form-group label {
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.input,
.select,
.textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fffdf8;
  color: var(--ink);
  padding: 10px 13px;
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  transition:
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}

.input::placeholder,
.textarea::placeholder {
  color: #9a9b90;
}

.input:hover,
.select:hover,
.textarea:hover {
  border-color: #b7a88f;
}

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fffefa;
  box-shadow: 0 0 0 4px rgba(177, 74, 47, 0.1);
}

.select {
  appearance: none;
  padding-right: 36px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 13px) 50%;
  background-repeat: no-repeat;
  background-size: 5px 5px, 5px 5px;
}

.textarea {
  min-height: 94px;
  line-height: 1.7;
  resize: vertical;
}

#bulk-text {
  min-height: 230px;
  font-family: var(--mono);
  font-size: 13px;
}

code {
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-soft);
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 0.88em;
}

.hint {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.65;
}

/* ---------- toolbar / table ---------- */

.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.toolbar .spacer {
  flex: 1;
}

.toolbar .input,
.toolbar .select {
  background: var(--surface);
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 16px 12px;
  border-bottom: 1px solid rgba(29, 43, 39, 0.09);
  text-align: left;
  vertical-align: top;
}

.table th {
  padding-top: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink-2);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 1.4;
  text-transform: uppercase;
  white-space: nowrap;
}

.table tbody tr {
  transition: background 0.16s ease;
}

.table tbody tr:hover {
  background: rgba(177, 74, 47, 0.035);
}

.table tbody tr:last-child td {
  border-bottom: 0;
}

.table td .row {
  flex-wrap: nowrap;
  gap: 6px;
}

.table td .btn-sm {
  padding: 5px 9px;
}

.table th:last-child,
.table td:last-child {
  min-width: 112px;
}

.table .word {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.table .word:hover {
  color: var(--accent-deep);
}

.table td strong {
  font-weight: 650;
}

.meaning-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.meaning-list li {
  margin: 1px 0;
}

.pos {
  margin-right: 5px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 12px;
  font-style: italic;
}

/* ---------- badges & alerts ---------- */

.badge {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(29, 43, 39, 0.03);
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.03em;
  line-height: 1.6;
  white-space: nowrap;
}

.badge-new {
  border-color: rgba(92, 122, 104, 0.28);
  background: var(--sage-soft);
  color: var(--sage-deep);
}

.badge-due {
  border-color: rgba(164, 122, 54, 0.28);
  background: var(--gold-soft);
  color: var(--warning);
}

.badge-tag {
  border-color: rgba(29, 43, 39, 0.12);
  background: rgba(29, 43, 39, 0.03);
  color: var(--muted);
}

.badge-ok {
  border-color: rgba(63, 107, 82, 0.25);
  background: var(--success-bg);
  color: var(--success);
}

.alert {
  margin: 14px 0;
  padding: 12px 15px;
  border: 1px solid transparent;
  border-left-width: 3px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.6;
}

.alert-error {
  border-color: rgba(163, 58, 42, 0.2);
  border-left-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

.alert-success {
  border-color: rgba(63, 107, 82, 0.2);
  border-left-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
}

.alert-warning {
  border-color: rgba(138, 100, 32, 0.2);
  border-left-color: var(--warning);
  background: var(--warning-bg);
  color: var(--warning);
}

/* ---------- utilities ---------- */

.hidden {
  display: none !important;
}

.row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.between {
  justify-content: space-between;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.small {
  font-size: 13px;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 6px; }
.mt-2 { margin-top: 12px; }
.mt-3 { margin-top: 20px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 12px; }

.pager {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.empty {
  padding: 56px 20px;
  color: var(--muted);
  text-align: center;
}

.empty::before {
  content: "Aa";
  display: block;
  margin-bottom: 6px;
  color: var(--line-strong);
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1;
}

.empty .btn {
  margin-top: 14px;
}

.meaning-row {
  display: grid;
  grid-template-columns: 1fr 140px 42px;
  gap: 8px;
  margin-bottom: 8px;
}

.meaning-row .btn {
  align-self: stretch;
  padding: 0;
  font-size: 18px;
  line-height: 1;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.chip {
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-2);
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition:
    border-color 0.18s ease,
    background 0.18s ease,
    color 0.18s ease;
}

.chip:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.section-title {
  font-size: 22px;
}

/* ---------- login ---------- */

.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 42px 24px;
  background:
    radial-gradient(900px 600px at 8% 0%, rgba(177, 74, 47, 0.1), transparent 55%),
    radial-gradient(800px 560px at 100% 100%, rgba(92, 122, 104, 0.12), transparent 52%);
}

.login-card {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  width: min(900px, 100%);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 44px 100px -64px rgba(29, 43, 39, 0.75);
}

.login-art {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 530px;
  overflow: hidden;
  padding: 46px 42px;
  background:
    radial-gradient(420px 300px at 100% 0%, rgba(177, 74, 47, 0.22), transparent 60%),
    var(--ink);
  color: var(--paper);
}

.login-art::before {
  content: "";
  position: absolute;
  right: -118px;
  bottom: -92px;
  width: 330px;
  height: 330px;
  border: 1px solid rgba(245, 239, 227, 0.16);
  border-radius: 50%;
}

.login-art::after {
  content: "Aa";
  position: absolute;
  left: 30px;
  bottom: 24px;
  color: rgba(245, 239, 227, 0.1);
  font-family: var(--serif);
  font-size: clamp(150px, 17vw, 220px);
  font-weight: 500;
  letter-spacing: -0.09em;
  line-height: 0.8;
}

.login-art-mark,
.login-art-foot,
.login-art-quote {
  position: relative;
  z-index: 1;
}

.login-art-mark {
  color: rgba(245, 239, 227, 0.7);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.login-art-quote {
  max-width: 300px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(23px, 2.5vw, 31px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.5;
}

.login-art-foot {
  color: rgba(245, 239, 227, 0.45);
  font-size: 10px;
  letter-spacing: 0.24em;
}

.login-form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 52px 46px;
}

.login-form h1 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.login-form > p:not(.eyebrow) {
  margin: 0 0 24px;
  color: var(--muted);
}

.login-form .form-group {
  margin-bottom: 14px;
}

.login-form .btn {
  width: 100%;
  margin-top: 4px;
}

.login-form .hint {
  margin-top: 22px;
}

/* ---------- practice ---------- */

.practice-top {
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.practice-question {
  padding: 6px 2px 0;
}

.practice-question > .muted {
  margin-bottom: 2px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
}

.prompt-word {
  margin: 10px 0 14px;
  overflow-wrap: anywhere;
  font-family: var(--serif);
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.prompt-meanings {
  margin: 8px 0 14px;
  overflow-wrap: anywhere;
  color: var(--ink-2);
  font-family: var(--serif);
  font-size: clamp(23px, 3vw, 30px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.5;
}

.options {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.option {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 0.16s ease,
    background 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.16s ease;
}

.option:hover {
  border-color: var(--accent);
  background: #fffaf1;
  transform: translateY(-1px);
}

.option.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(177, 74, 47, 0.11);
}

.option.option-correct {
  border-color: var(--sage);
  background: var(--success-bg);
}

.option-key {
  display: inline-grid;
  place-items: center;
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 13px;
  font-weight: 600;
}

.option.selected .option-key {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.option.option-correct .option-key {
  border-color: var(--sage);
  background: var(--sage);
  color: #fff;
}

#fill-area {
  max-width: 440px;
  margin-top: 22px;
}

#fill-area label {
  display: block;
  margin-bottom: 7px;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

#fill-area .input {
  font-family: var(--serif);
  font-size: 23px;
  letter-spacing: 0.01em;
  padding: 12px 14px;
}

.feedback {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-radius: 14px;
}

.feedback strong {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.feedback p {
  margin: 4px 0;
}

.feedback-correct {
  border-color: rgba(63, 107, 82, 0.25);
  border-left-color: var(--sage);
  background: var(--success-bg);
}

.feedback-close {
  border-color: rgba(138, 100, 32, 0.22);
  border-left-color: var(--gold);
  background: var(--warning-bg);
}

.feedback-wrong {
  border-color: rgba(163, 58, 42, 0.22);
  border-left-color: var(--danger);
  background: var(--danger-bg);
}

#practice-card #next {
  margin-top: 10px;
}

/* ---------- result ---------- */

.result-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.result-stat {
  padding: 20px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(155deg, #fffdf8, #f9f2e5);
  text-align: center;
}

.result-number {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 42px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.result-stat:nth-child(1) .result-number { color: var(--sage-deep); }
.result-stat:nth-child(2) .result-number { color: var(--warning); }
.result-stat:nth-child(3) .result-number { color: var(--danger); }
.result-stat:nth-child(4) .result-number { color: var(--accent-deep); }

.result-stat .muted {
  font-size: 12px;
  letter-spacing: 0.03em;
}

/* ---------- small ornamental motion ---------- */

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero,
  .card,
  .stat,
  .login-card {
    animation: rise 0.55s cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }

  .grid-3 .stat:nth-child(2) {
    animation-delay: 0.06s;
  }

  .grid-3 .stat:nth-child(3) {
    animation-delay: 0.12s;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero h1 {
    max-width: 560px;
  }

  .login-card {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .login-art {
    padding: 38px 32px;
  }

  .login-form {
    padding: 44px 36px;
  }
}

@media (max-width: 760px) {
  .container,
  .narrow {
    width: calc(100% - 32px);
  }

  .topbar-inner {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px 12px;
    padding: 11px 0 9px;
  }

  .brand {
    font-size: 20px;
  }

  .brand::before {
    width: 28px;
    height: 28px;
    font-size: 15px;
  }

  .topbar .btn {
    margin-left: auto;
  }

  .nav {
    order: 3;
    flex: 0 0 100%;
    width: 100%;
    min-width: 0;
    flex-wrap: nowrap;
    gap: 4px;
    overflow-x: auto;
    padding: 1px 0 3px;
    scrollbar-width: none;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .nav a {
    flex: 0 0 auto;
    padding: 7px 10px;
    font-size: 13px;
  }

  .page {
    padding: 30px 0 54px;
  }

  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 16px;
    padding: 2px 0 24px;
    margin-bottom: 22px;
  }

  .hero::after {
    display: none;
  }

  .hero h1 {
    font-size: clamp(34px, 9vw, 44px);
  }

  .hero .row {
    margin-bottom: 0;
  }

  .page-title {
    font-size: 32px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .stat {
    padding: 18px 18px 20px;
  }

  .stat .label {
    font-size: 10.5px;
  }

  .stat .value {
    font-size: 34px;
  }

  .card {
    padding: 21px;
    border-radius: 15px;
  }

  .card h2 {
    font-size: 20px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .meaning-row {
    grid-template-columns: minmax(0, 1fr) 100px 40px;
  }

  .toolbar {
    gap: 8px;
  }

  .toolbar .input,
  .toolbar .select {
    flex: 1 1 140px;
    max-width: none !important;
  }

  .toolbar .btn {
    flex: 0 0 auto;
  }

  .table {
    min-width: 640px;
  }

  .table th:nth-child(5),
  .table td:nth-child(5) {
    display: none;
  }

  .table-cards {
    min-width: 0;
  }

  .table-cards,
  .table-cards tbody {
    display: block;
  }

  .table-cards thead {
    display: none;
  }

  .table-cards tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(29, 43, 39, 0.09);
  }

  .table-cards td {
    display: block;
    padding: 0;
    border: 0;
  }

  .table-cards td:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
  }

  .table-cards td:nth-child(6) {
    grid-column: 2;
    grid-row: 1;
    align-self: start;
  }

  .table-cards td:nth-child(2) {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 3px;
  }

  .table-cards td:nth-child(3) {
    grid-column: 1;
    grid-row: 3;
    margin-top: 5px;
  }

  .table-cards td:nth-child(5) {
    display: block;
    grid-column: 2;
    grid-row: 3;
    margin-top: 5px;
    text-align: right;
    white-space: nowrap;
  }

  .table-cards td:nth-child(4) {
    grid-column: 1 / -1;
    grid-row: 4;
    margin-top: 4px;
  }

  .table-cards td:nth-child(4)::before {
    content: "有效系数 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .table-cards td:nth-child(5)::before {
    content: "最近练习 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .result-cards {
    min-width: 0;
  }

  .result-cards,
  .result-cards tbody {
    display: block;
  }

  .result-cards thead {
    display: none;
  }

  .result-cards tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 3px 12px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(29, 43, 39, 0.09);
  }

  .result-cards td {
    display: block;
    padding: 0;
    border: 0;
  }

  .result-cards td:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
    font-family: var(--serif);
    font-size: 18px;
  }

  .result-cards td:nth-child(3) {
    grid-column: 2;
    grid-row: 1;
    text-align: right;
  }

  .result-cards td:nth-child(2) {
    grid-column: 1;
    grid-row: 2;
  }

  .result-cards td:nth-child(4) {
    grid-column: 2;
    grid-row: 2;
    text-align: right;
  }

  .result-cards td:nth-child(5) {
    display: block;
    grid-column: 1;
    grid-row: 3;
    margin-top: 3px;
  }

  .result-cards td:nth-child(6) {
    grid-column: 2;
    grid-row: 3;
    margin-top: 3px;
    text-align: right;
  }

  .result-cards td:nth-child(2)::before {
    content: "方向 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .result-cards td:nth-child(4)::before {
    content: "作答 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .result-cards td:nth-child(5)::before {
    content: "系数 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .result-cards td:nth-child(6)::before {
    content: "有效 ";
    color: var(--muted);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .result-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .result-number {
    font-size: 36px;
  }

  .login-page {
    padding: 22px 16px;
  }

  .login-card {
    grid-template-columns: 1fr;
    border-radius: 20px;
  }

  .login-art {
    min-height: 186px;
    padding: 26px 26px 24px;
  }

  .login-art::after {
    left: auto;
    right: 18px;
    bottom: -10px;
    font-size: 150px;
  }

  .login-art-quote {
    display: block;
    max-width: 230px;
    font-size: 18px;
    line-height: 1.55;
  }

  .login-form {
    padding: 32px 26px 30px;
  }

  .login-form h1 {
    font-size: 34px;
  }

  .practice-top {
    margin-bottom: 18px;
  }

  .prompt-word {
    font-size: clamp(40px, 11vw, 54px);
  }

  .prompt-meanings {
    font-size: 24px;
  }

  .option {
    padding: 14px 15px;
    font-size: 15px;
  }

  #fill-area .input {
    font-size: 21px;
  }
}

@media (max-width: 380px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero .row,
  .hero .row .btn {
    width: 100%;
  }

  .hero .row .btn {
    flex: 1 1 100%;
  }

  .card {
    padding: 18px;
  }

  .stat {
    padding: 18px 20px 20px;
  }

  .stat .value {
    font-size: 38px;
  }

  .result-summary {
    gap: 10px;
  }

  .result-stat {
    padding: 16px 8px;
  }

  .feedback {
    padding: 15px 16px;
  }

  .feedback strong {
    font-size: 20px;
  }
}