* { box-sizing: border-box; }

:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #202735;
  background: #f2f5f9;
  font-synthesis: none;
}

body { margin: 0; min-height: 100vh; }
.page { width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 56px 0 40px; }
.intro { margin-bottom: 26px; }
.home-link { display: inline-block; margin-bottom: 20px; color: #4057b0; font-size: .92rem; font-weight: 750; text-decoration: none; }
.home-link:hover { text-decoration: underline; }
.eyebrow { color: #5369b2; font-size: .78rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 8px 0; font-size: clamp(2.4rem, 8vw, 4rem); letter-spacing: -.055em; }
.intro > p:last-child { max-width: 590px; color: #5e6878; line-height: 1.65; }
.default-list-card { display: grid; justify-items: start; gap: 18px; margin-bottom: 14px; padding: 24px; border: 1px solid #d6e1ef; border-radius: 16px; background: #fff; }
.default-list-card h2 { margin: 0; font-size: 1.1rem; }
.default-list-card p { margin: 6px 0 0; color: #5e6878; line-height: 1.5; }
.default-list-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.default-wordlist-buttons { display: flex; flex-wrap: wrap; gap: 10px; }
.wordlist-choice { min-width: 112px; }
.customized-list-dialog { position: relative; width: min(720px, calc(100% - 32px)); max-width: none; padding: 24px; border: 1px solid var(--theme-border); border-radius: 18px; background: var(--theme-surface); box-shadow: 0 24px 80px #17203335; color: var(--theme-text); }
.customized-list-dialog::backdrop { background: rgb(23 32 51 / 48%); backdrop-filter: blur(2px); }
.customized-list-dialog .custom-list-panel { margin: 0; padding: 24px; border: 1px solid var(--theme-border); border-radius: 16px; background: var(--theme-surface); color: var(--theme-text); }
.custom-list-intro h2 { margin: 0; font-size: 1.1rem; }
.custom-list-intro p, .custom-list-form > p { margin: 7px 0 18px; color: var(--theme-muted); line-height: 1.5; }
.customized-list-shelf { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--theme-border); }
.customized-list-shelf h2 { margin: 0 0 12px; font-size: 1rem; }
.customized-wordlist-list { display: flex; flex-wrap: wrap; gap: 9px; }
.customized-wordlist-button { min-height: 40px; }
.empty-customized-lists { margin: 0; color: var(--theme-muted); font-size: .92rem; }
.custom-list-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 20px; }
.custom-list-option { display: grid; justify-items: start; gap: 8px; min-height: 112px; padding: 18px; border: 1px solid #cbd3df; background: #f7f8fc; color: #202735; text-align: left; }
.custom-list-option:hover { border-color: #7c8bd0; background: #eef1fc; color: #202735; }
.custom-list-option[aria-pressed="true"] { border-color: var(--theme-accent-hover); background: var(--theme-accent-hover); color: var(--theme-button-text, #fff); }
.custom-list-option strong { font-size: 1rem; }
.custom-list-option span { color: inherit; font-size: .92rem; font-weight: 550; line-height: 1.45; }
.custom-list-form { display: grid; gap: 12px; margin-top: 14px; }
.custom-list-form h3 { margin: 4px 0; font-size: 1.05rem; }
.custom-list-form label { font-size: .92rem; }
.custom-list-form input, .manual-word-row select { min-height: 42px; width: 100%; padding: 8px 10px; border: 1px solid var(--theme-border); border-radius: 8px; background: var(--theme-surface); color: var(--theme-text); font: inherit; }
.custom-list-form input::placeholder { color: var(--theme-muted); opacity: 1; }
.manual-word-rows { display: grid; gap: 9px; }
.manual-word-row { display: grid; grid-template-columns: 105px minmax(130px, 1fr) minmax(150px, 1fr) auto; gap: 8px; align-items: center; }
.manual-word-control { position: relative; min-width: 0; }
.manual-word-control .manual-word { width: 100%; }
.manual-word-suggestions { position: absolute; z-index: 40; top: calc(100% + 5px); right: 0; left: 0; max-height: 250px; overflow-y: auto; padding: 6px; border: 1px solid var(--theme-border); border-radius: 10px; background: var(--theme-surface); box-shadow: 0 12px 30px #17203324; }
.manual-word-suggestions[hidden] { display: none; }
.manual-word-suggestion.secondary { display: flex; width: 100%; min-height: 40px; align-items: baseline; justify-content: flex-start; gap: 9px; padding: 8px 10px; border: 0; border-radius: 7px; background: transparent !important; color: var(--theme-text) !important; text-align: left; }
.manual-word-suggestion.secondary:hover, .manual-word-suggestion.secondary:focus-visible { background: var(--theme-soft) !important; }
.manual-suggestion-word { flex: 0 0 auto; }
.manual-suggestion-article { flex: 0 0 auto; color: var(--theme-accent); font-size: .82rem; font-weight: 800; }
.manual-suggestion-meaning { overflow: hidden; color: var(--theme-muted); font-size: .82rem; font-weight: 500; text-overflow: ellipsis; white-space: nowrap; }
.manual-word-row .remove-word-row { min-height: 40px; padding: 0 10px; }
.custom-list-form-actions { display: flex; justify-content: flex-end; margin-top: 6px; }
.custom-list-form .back-to-options { justify-self: start; min-height: 38px; }
.custom-list-form .upload-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.custom-list-form .upload-actions a { color: var(--theme-accent); font-size: .92rem; font-weight: 700; }
.upload-status { margin: 16px 0 0; color: var(--theme-muted); line-height: 1.45; }
.dialog-close { position: absolute; top: 8px; right: 8px; z-index: 1; width: 40px; min-height: 40px; padding: 0; font-size: 1.5rem; line-height: 1; }
.upload-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; padding: 20px 24px; border: 1px solid #d6e1ef; border-radius: 16px; background: #eaf0fa; }
.upload-card h2 { margin: 0; font-size: 1.1rem; }
.upload-card p { margin: 6px 0 0; color: #5e6878; line-height: 1.5; }
.upload-actions { display: flex; flex-shrink: 0; align-items: center; gap: 14px; }
.upload-actions a { color: #4057b0; font-size: .92rem; font-weight: 650; }
.upload-status { flex-basis: 100%; }
.upload-card { flex-wrap: wrap; }
.practice-card { padding: clamp(20px, 5vw, 36px); border: 1px solid #e0e5ed; border-radius: 20px; background: white; box-shadow: 0 18px 50px #27365512; }
.toolbar { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
.page-navigation { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: -14px 0 24px; }
.page-navigation[hidden] { display: none; }
.page-navigation-bottom { margin: 22px 0 0; }
.page-indicator { min-width: 105px; color: #5e6878; font-size: .95rem; font-weight: 700; text-align: center; }
.field { display: grid; gap: 8px; }
label { font-weight: 700; }
select, .answer { min-height: 44px; border: 1px solid #cbd3df; border-radius: 9px; background: #fff; color: inherit; font: inherit; }
select { padding: 0 34px 0 12px; }
h2 { margin: 0; font-size: 1.45rem; }
.hint { margin: 7px 0 18px; color: #697386; }
.word-list { display: grid; gap: 10px; }
.word-row { display: grid; grid-template-columns: auto minmax(130px, 1fr) minmax(165px, 1fr); align-items: center; gap: 12px; padding: 13px 14px; border: 1px solid #e7eaf0; border-radius: 11px; }
.word { position: relative; display: inline-block; font-size: 1.1rem; font-weight: 700; outline-offset: 3px; }
.meaning-tooltip { position: absolute; z-index: 5; left: 0; bottom: calc(100% + 10px); width: max-content; max-width: min(250px, 70vw); padding: 10px 13px; border: 1px solid #ffffff30; border-radius: 10px; background: rgb(32 39 53 / 88%); box-shadow: 0 8px 24px #17203330; color: #fff; font-size: .9rem; font-weight: 550; line-height: 1.4; white-space: normal; opacity: 0; visibility: hidden; transform: translateY(4px); transition: opacity .15s ease, transform .15s ease, visibility .15s; pointer-events: none; }
.word:hover .meaning-tooltip, .word:focus .meaning-tooltip { opacity: 1; visibility: visible; transform: translateY(0); }
.choices { display: flex; gap: 8px; }
select:focus { outline: 3px solid #ccd5ff; border-color: #596fc4; }
.result { min-height: 1.3em; font-size: .9rem; font-weight: 650; }
.result .feedback-line { display: block; }
.correct { color: #18734a; }
.incorrect { color: #b33e38; }
.choice-button { min-width: 58px; min-height: 40px; padding: 0 13px; }
.choice-button:disabled { cursor: default; opacity: .58; }
.choice-button.right-answer { background: #18734a; opacity: 1; }
.choice-button.wrong-answer { background: #b33e38; opacity: 1; }
.actions { display: flex; gap: 10px; margin-top: 22px; }
button { min-height: 46px; padding: 0 17px; border: 0; border-radius: 9px; background: #475fc0; color: white; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #34499f; }
button:disabled { cursor: not-allowed; opacity: .55; }
button:focus-visible { outline: 3px solid #aab7f5; outline-offset: 2px; }
button.secondary { border: 1px solid #cbd3df; background: white; color: #354052; }
button.secondary:hover { background: #f3f5f9; }
.summary { min-height: 1.5em; margin: 18px 0 0; font-weight: 700; }
footer { padding: 20px 4px; color: #687386; font-size: .93rem; }

@media (max-width: 560px) {
  .page { padding-top: 30px; }
  .intro { padding-right: 0; }
  .upload-card { align-items: flex-start; flex-direction: column; padding: 18px; }
  .default-list-card { padding: 18px; }
  .upload-actions { align-items: flex-start; flex-direction: column; }
  .customized-list-dialog { padding: 18px; }
  .customized-list-dialog .custom-list-panel { padding: 18px; }
  .custom-list-options { grid-template-columns: 1fr; }
  .manual-word-row { grid-template-columns: 90px minmax(0, 1fr); }
  .manual-word-row .manual-meaning { grid-column: 2; }
  .manual-word-row .remove-word-row { grid-column: 1; grid-row: 2; }
  .toolbar { align-items: flex-start; flex-direction: column; }
  .word-row { grid-template-columns: auto minmax(0, 1fr); gap: 8px; }
  .result { grid-column: 1 / -1; }
  .actions { flex-direction: column; }
}