:root {
  --preview-ink: #10285a;
  --preview-blue: #246ff2;
  --preview-violet: #7459ed;
  --preview-pink: #ef3d82;
  --preview-mint: #13bca3;
  --preview-gold: #ffbf25;
  --preview-paper: rgba(255, 255, 255, 0.92);
  --preview-line: rgba(127, 161, 211, 0.26);
  --preview-shadow: 0 16px 42px rgba(30, 66, 122, 0.15);
}

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  color: var(--preview-ink);
  background:
    linear-gradient(rgba(241, 248, 255, 0.72), rgba(240, 247, 255, 0.82)),
    url("assets/ui/backgrounds/bg_hallway_bright.png") center / cover fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(110deg, rgba(255,255,255,0.25), rgba(118,166,236,0.08));
}

body.preview-home {
  background:
    linear-gradient(rgba(244, 249, 255, 0.46), rgba(232, 243, 255, 0.58)),
    url("assets/ui/backgrounds/bg_classroom_bright.png") center / cover fixed;
}

body.preview-wordfall {
  background:
    linear-gradient(rgba(18, 29, 70, 0.28), rgba(12, 24, 61, 0.54)),
    url("assets/ui/backgrounds/bg_wordfall_room.png") center / cover fixed;
}

.app {
  width: min(1140px, calc(100% - 28px));
  margin: 14px auto 28px;
}

.app-header {
  position: relative;
  display: grid;
  grid-template-columns: minmax(330px, 1.1fr) minmax(500px, 1fr);
  align-items: center;
  min-height: 116px;
  padding: 10px 14px 10px 18px;
  border-color: rgba(255,255,255,0.8);
  border-radius: 22px;
  background: rgba(255,255,255,0.86);
  box-shadow: 0 12px 34px rgba(31, 68, 126, 0.13);
  backdrop-filter: blur(14px);
}

.header-top { align-items: center; min-width: 0; }
.brand-home {
  display: grid;
  grid-template-rows: 116px;
  gap: 0;
  min-width: 225px;
  min-height: 0;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  overflow: hidden;
}
.brand-home:hover { transform: none; background: transparent; }
.brand-home img { width: 210px; height: 210px; margin-top: -47px; object-fit: contain; object-position: left center; }
.brand-home span { display: none; }

.brand-message {
  display: flex;
  align-items: center;
  gap: 4px;
  color: #1765d8;
  font-size: 0.92rem;
  font-style: italic;
  line-height: 1.25;
  transform: rotate(-3deg);
}
.brand-message img { width: 38px; height: 38px; object-fit: contain; }

.header-actions { display: none; }
.header-controls {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(190px, 1fr) minmax(150px, .8fr);
  gap: 0;
  align-items: stretch;
  margin: 0;
  border: 1px solid rgba(188, 210, 240, 0.68);
  border-radius: 18px;
  background: rgba(255,255,255,0.78);
  box-shadow: 0 8px 22px rgba(35,78,136,0.08);
}
.header-controls > * { min-width: 0; padding: 10px 15px; }
.header-controls > * + * { border-left: 1px solid #dce7f6; }
.set-switcher { margin: 0; max-width: none; }
.set-switcher .label, .progress-text small, .xp-label { display: block; color: #70809d; font-size: 0.68rem; font-weight: 800; }
.set-switcher .text-input { min-height: 36px; padding: 4px 6px; border: 0; background: transparent; color: var(--preview-ink); font-weight: 800; }
.progress-wrap { position: relative; display: grid; align-content: center; margin: 0; padding-left: 40px !important; }
.header-stat-icon { position: absolute; left: 14px; top: 22px; color: var(--preview-blue); font-size: 1.35rem; font-weight: 900; }
.progress-text strong { display: block; color: var(--preview-blue); font-size: 1.05rem; }
.progress-bar-bg { height: 6px; margin-top: 5px; }
.header-side { display: grid; align-content: center; max-width: none; justify-self: stretch; }
.xp-panel { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 8px; margin: 0; padding: 0; border: 0; background: transparent; }
.xp-bolt { grid-row: 1 / 3; align-self: center; color: #ffc000; font-size: 1.4rem; }
.xp-value { color: var(--preview-ink); font-size: 1.1rem; }
.sync-status { margin: 4px 0 0; overflow: hidden; font-size: 0.65rem; text-overflow: ellipsis; white-space: nowrap; }

.preview-dashboard { margin-top: 12px; }
.home-hero {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 96px;
  overflow: hidden;
  padding: 16px 110px;
  border: 1px solid rgba(255,255,255,0.92);
  border-radius: 20px;
  color: #164d9f;
  background:
    linear-gradient(90deg, rgba(235,248,255,0.86), rgba(255,255,255,0.64), rgba(224,244,255,0.86)),
    url("assets/ui/backgrounds/bg_courtyard_bright.png") center 58% / cover;
  box-shadow: var(--preview-shadow);
  text-align: center;
}
.home-hero::after { content: ""; position: absolute; inset: auto 0 0; height: 3px; background: linear-gradient(90deg, transparent, #67b8ff, #7e6cf5, transparent); }
.home-hero h1 { margin: 2px 0 4px; font-size: clamp(1.35rem, 2.6vw, 2rem); letter-spacing: .12em; }
.home-hero p { margin: 0; color: #526b99; }
.home-kicker { color: #2b76dd !important; font-size: .62rem; font-weight: 900; letter-spacing: .2em; }
.home-hero > img { position: absolute; right: 36px; width: 84px; height: 84px; object-fit: contain; transform: rotate(-8deg); }

.continue-card {
  display: grid;
  grid-template-columns: 44px minmax(0,1fr) auto;
  align-items: center;
  gap: 13px;
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid rgba(185,210,241,.82);
  border-radius: 17px;
  background: rgba(249,252,255,.91);
  box-shadow: 0 9px 25px rgba(31,70,126,.1);
  backdrop-filter: blur(12px);
}
.continue-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; color: #fff; background: linear-gradient(145deg,#4d91f5,#286bd8); box-shadow: 0 7px 16px rgba(36,111,242,.2); }
.continue-copy { min-width: 0; }
.continue-copy p, .continue-copy h2, .continue-copy span { margin: 0; }
.continue-copy p { color: #6c7f9c; font-size: .68rem; font-weight: 850; letter-spacing: .08em; }
.continue-copy h2 { margin-top: 1px; font-size: 1.05rem; }
.continue-copy span { display: block; overflow: hidden; color: #5b6f8e; font-size: .76rem; text-overflow: ellipsis; white-space: nowrap; }
.continue-button { min-width: 125px; color: #fff; border-color: var(--preview-blue); background: linear-gradient(135deg,#3788fa,#2169df); font-weight: 850; }

.mode-grid { display: grid; gap: 12px; margin-top: 12px; }
.mode-grid-primary { grid-template-columns: repeat(3, minmax(0,1fr)); }
.mode-grid-secondary { grid-template-columns: repeat(5, minmax(0,1fr)); }
.mode-card {
  position: relative;
  display: grid;
  overflow: hidden;
  min-width: 0;
  border: 1px solid rgba(255,255,255,.94);
  color: var(--preview-ink);
  background: rgba(255,255,255,.88);
  box-shadow: 0 12px 30px rgba(35,75,133,.13), inset 0 1px 0 #fff;
  text-align: left;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.mode-card::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(145deg, rgba(255,255,255,.46), transparent 55%); }
.mode-card:hover { transform: translateY(-4px); border-color: rgba(91,139,223,.42); box-shadow: 0 18px 38px rgba(35,75,133,.2), inset 0 1px 0 #fff; }
.mode-card:active { transform: translateY(-1px); }
.mode-grid-primary .mode-card { grid-template-columns: minmax(118px, 40%) 1fr auto; grid-template-rows: 1fr; align-items: end; min-height: 206px; padding: 18px 18px 18px 10px; border-radius: 20px; }
.mode-grid-secondary .mode-card { grid-template-rows: 74px auto; align-content: start; min-height: 150px; padding: 10px 12px 13px; border-radius: 17px; }
.mode-art { position: relative; z-index: 1; display: grid; place-items: center; min-width: 0; }
.mode-grid-primary .mode-art { align-self: center; }
.mode-grid-primary .mode-art img { width: 150px; max-width: 100%; height: 150px; object-fit: contain; filter: drop-shadow(0 12px 10px rgba(24,63,124,.16)); }
.mode-grid-secondary .mode-art img { width: 80px; height: 76px; object-fit: contain; filter: drop-shadow(0 8px 8px rgba(24,63,124,.12)); }
.mode-copy { position: relative; z-index: 1; display: grid; gap: 6px; min-width: 0; }
.mode-copy strong { font-size: clamp(1.18rem, 2vw, 1.55rem); line-height: 1.1; }
.mode-copy small { color: #41567c; font-size: .85rem; line-height: 1.55; }
.mode-grid-secondary .mode-copy strong { font-size: 1.05rem; }
.mode-grid-secondary .mode-copy small { font-size: .72rem; line-height: 1.45; }
.mode-arrow { position: relative; z-index: 1; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: #fff; background: var(--preview-blue); font-size: 1.15rem; }
.mode-grid-secondary .mode-arrow { position: absolute; right: 10px; bottom: 10px; width: 27px; height: 27px; font-size: .85rem; }
.mode-study { background: linear-gradient(150deg, rgba(211,231,255,.95), rgba(250,253,255,.92)); }
.mode-wordfall { background: linear-gradient(150deg, rgba(224,213,255,.96), rgba(250,247,255,.92)); }
.mode-battle { background: linear-gradient(150deg, rgba(255,207,229,.96), rgba(255,248,251,.92)); }
.mode-wordfall .mode-arrow { background: var(--preview-violet); }
.mode-battle .mode-arrow { background: var(--preview-pink); }
.mode-flip { background: linear-gradient(150deg, rgba(210,255,230,.96), rgba(250,255,252,.92)); }
.mode-test { background: linear-gradient(150deg, rgba(214,240,255,.96), rgba(250,253,255,.92)); }
.mode-match { background: linear-gradient(150deg, rgba(255,239,197,.96), rgba(255,252,244,.92)); }
.mode-list { background: linear-gradient(150deg, rgba(232,222,255,.96), rgba(252,250,255,.92)); }
.mode-set { background: linear-gradient(150deg, rgba(201,250,239,.96), rgba(249,255,253,.92)); }
.mode-flip .mode-arrow { background: #2abf73; }
.mode-test .mode-arrow { background: #28a1ee; }
.mode-match .mode-arrow { background: var(--preview-gold); }
.mode-list .mode-arrow { background: var(--preview-violet); }
.mode-set .mode-arrow { background: var(--preview-mint); }

.home-utilities {
  display: grid;
  grid-template-columns: 1.1fr repeat(3, 1fr);
  gap: 10px;
  align-items: center;
  margin-top: 12px;
  padding: 12px 16px;
  border: 1px solid rgba(255,255,255,.84);
  border-radius: 18px;
  background: rgba(248,251,255,.87);
  box-shadow: 0 10px 28px rgba(34,72,126,.11);
  backdrop-filter: blur(12px);
}
.home-utilities > div { display: grid; gap: 2px; }
.home-utilities > div span { color: #71809b; font-size: .72rem; }
.utility-button, .about-details summary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 8px 11px;
  border: 1px solid #d3dfef;
  border-radius: 11px;
  color: var(--preview-ink);
  background: rgba(255,255,255,.86);
  font-size: .78rem;
  font-weight: 800;
  cursor: pointer;
}
.utility-button span, .about-details summary span { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; color: #fff; background: #397fe2; }
.about-details { position: relative; }
.about-details summary { list-style: none; }
.about-details summary::-webkit-details-marker { display: none; }
.about-details p { position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 5; width: 270px; margin: 0; padding: 14px; border: 1px solid #d5e2f2; border-radius: 12px; background: #fff; box-shadow: var(--preview-shadow); color: #536887; font-size: .78rem; line-height: 1.6; }

.preview-home #main-tabs, .preview-home .tab-panel { display: none !important; }
body:not(.preview-home) .preview-dashboard { display: none; }

.tabs {
  position: sticky;
  top: 6px;
  z-index: 8;
  grid-template-columns: repeat(10, minmax(max-content, 1fr));
  gap: 5px;
  margin-top: 10px;
  padding: 7px;
  overflow-x: auto;
  border: 1px solid rgba(255,255,255,.82);
  border-radius: 16px;
  background: rgba(249,252,255,.88);
  box-shadow: 0 8px 25px rgba(27,65,120,.12);
  backdrop-filter: blur(14px);
}
.tabs button, .tabs .battle-nav-link { min-height: 40px; padding: 8px 10px; border-radius: 10px; font-size: .78rem; white-space: nowrap; }
.preview-home-btn { color: var(--preview-blue); border-color: #bdd3f4; background: #eef5ff; font-weight: 900; }
.tabs .tab-btn.active { background: linear-gradient(135deg, #367cf0, #2064d5); }
.tabs .battle-nav-link,
.tabs .wordfall-tab-btn {
  color: var(--preview-ink);
  border-color: #c8d9f1;
  background: #fff;
  font-weight: 700;
}
.tabs .battle-nav-link:hover,
.tabs .wordfall-tab-btn:hover { color: #155fce; border-color: #8eb7ef; background: #f0f6ff; }
.tabs .wordfall-tab-btn.active { color: #fff; border-color: var(--preview-blue); background: linear-gradient(135deg, #367cf0, #2064d5); }

.tab-panel {
  min-height: 520px;
  margin-top: 10px;
  padding: clamp(18px, 3vw, 30px);
  border-color: rgba(255,255,255,.85);
  border-radius: 22px;
  background: rgba(255,255,255,.94);
  box-shadow: var(--preview-shadow);
  backdrop-filter: blur(13px);
}
.panel-head { padding-bottom: 14px; border-bottom: 1px solid #e4ecf7; }
.panel-head h2 { font-size: 1.35rem; }
.study-card, .list-controls, .test-count-control { border-color: #dce7f5; border-radius: 16px; background: #fbfdff; }
.text-input, .direction-select, .range-input { border-color: #bfd0e7; border-radius: 12px; background: #fff; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid rgba(28, 111, 242, .48);
  outline-offset: 3px;
}

.preview-wordfall .app-header { background: rgba(246,249,255,.9); }
.preview-wordfall #tab-wordfall { border-color: rgba(139,125,244,.4); background: rgba(247,248,255,.94); }
.preview-wordfall .wordfall-panel-head { padding: 16px 18px; border-radius: 16px; color: #fff; background: linear-gradient(120deg, rgba(72,58,174,.95), rgba(32,112,209,.92)); }
.preview-wordfall .wordfall-panel-head p, .preview-wordfall .wordfall-kicker { color: #e7e8ff; }

/* Shared mode language */
body:not(.preview-home) .tab-panel {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.92);
  background: rgba(255,255,255,.95);
}
body:not(.preview-home) .panel-head {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  column-gap: 13px;
  min-height: 64px;
  padding: 0 0 16px;
}
body:not(.preview-home) .panel-head::before {
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(145deg, #4f91f5, #256bd9);
  box-shadow: 0 8px 18px rgba(36,111,242,.2);
  font-size: 1.15rem;
  font-weight: 900;
}
.preview-study .panel-head::before { content: "✎"; }
.preview-flip .panel-head::before { content: "▣"; }
.preview-test .panel-head::before { content: "✓"; }
.preview-match .panel-head::before { content: "↔"; }
.preview-list .panel-head::before { content: "≡"; }
.preview-json .panel-head::before { content: "{ }"; font-size: .75rem; }
.preview-set .panel-head::before { content: "⚙"; }
body:not(.preview-home) .panel-head h2,
body:not(.preview-home) .panel-head > div { grid-column: 2; }
body:not(.preview-home) .panel-head > p { grid-column: 2; margin: 3px 0 0; }
body:not(.preview-home) .panel-head h2 { color: var(--preview-ink); font-size: clamp(1.28rem,2.2vw,1.65rem); }

body:not(.preview-home) button,
body:not(.preview-home) .text-input,
body:not(.preview-home) .direction-select,
body:not(.preview-home) .range-input {
  min-height: 46px;
  border-radius: 12px;
}
body:not(.preview-home) button { font-weight: 750; }
body:not(.preview-home) .primary-btn { border-color: var(--preview-blue); background: linear-gradient(135deg, #3788fa, #2169df); box-shadow: 0 7px 16px rgba(36,111,242,.2); }
body:not(.preview-home) .primary-btn:hover { background: linear-gradient(135deg, #2879eb, #165ac8); }

/* Study */
.preview-study #tab-study { max-width: 980px; margin-inline: auto; }
.preview-study .study-card { display: grid; gap: 8px; padding: clamp(18px,3vw,30px); background: linear-gradient(145deg,#f8fbff,#fff); }
.preview-study .range-controls { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; margin-bottom: 12px; padding: 12px 14px; border-radius: 14px; }
.preview-study .range-controls > .label { font-weight: 800; }
.preview-study .range-controls .range-row { margin: 0; }
.preview-study .range-controls .hint { margin: 0; text-align: right; font-size: .78rem; }
.preview-study .word-ja { margin: 12px 0 18px; color: #12346b; font-size: clamp(2rem,5.5vw,3.5rem); text-align: center; }
.preview-study #study-answer { min-height: 58px; font-size: 1.15rem; }
.study-enter-hint { margin: -1px 0 3px; color: #6b7e9a; font-size: .76rem; text-align: right; }
.study-enter-hint kbd { padding: 2px 6px; border: 1px solid #cad9ec; border-bottom-width: 2px; border-radius: 5px; background: #fff; font: inherit; font-weight: 800; }
.preview-study .study-actions { display: grid; grid-template-columns: minmax(180px,1.5fr) repeat(2,minmax(120px,1fr)); }

/* Flip */
.preview-flip #tab-flip { max-width: 1040px; margin-inline: auto; }
.flip-toolbar {
  display: grid;
  grid-template-columns: minmax(190px,1fr) auto auto;
  align-items: end;
  gap: 12px;
  margin: 16px auto 0;
  padding: 12px;
  border: 1px solid #d9e5f4;
  border-radius: 15px;
  background: #f7faff;
}
.flip-direction-field { display: grid; gap: 5px; color: #657792; font-size: .78rem; font-weight: 800; }
.flip-size-controls { display: grid; grid-template-columns: auto 48px 58px 48px; align-items: center; gap: 6px; color: #657792; font-size: .78rem; font-weight: 800; }
.flip-size-controls button { min-height: 42px !important; padding: 7px; color: #215fae; background: #fff; }
.flip-size-controls output { color: var(--preview-ink); text-align: center; font-variant-numeric: tabular-nums; }
.flip-present-btn { min-height: 42px !important; color: #fff !important; border-color: #6255d9 !important; background: linear-gradient(135deg,#7968ee,#5547c9) !important; }
.preview-flip .flip-card {
  width: min(760px,100%);
  height: clamp(340px,52vh,480px);
  min-height: 0;
  margin: 18px auto 0;
  border: 2px solid #c4d9f5;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 22px 48px rgba(29,66,121,.15);
}
.preview-flip .flip-card-inner { height: 100%; min-height: 0; }
.preview-flip .flip-face { padding: clamp(24px,5vw,56px); border-radius: 22px; }
.preview-flip .flip-front { background: radial-gradient(circle at 50% 15%,#fff,#edf6ff 82%); }
.preview-flip .flip-back { background: radial-gradient(circle at 50% 15%,#fff,#eeeaff 82%); }
.preview-flip .flip-word {
  max-width: 100%;
  margin: 0;
  color: #102e64;
  font-size: clamp(3rem,calc(5.8vw * var(--flip-font-scale,1)),6.5rem);
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.flip-control-dock { width: min(760px,100%); margin: 0 auto; }
.flip-key-hint { margin: 12px 0 8px; font-size: .78rem; text-align: center; }
.flip-actions { display: grid; grid-template-columns: 1fr 1.35fr 1fr .95fr .95fr; margin-top: 0; }
.flip-actions button { width: 100%; }
.flip-presentation { background: linear-gradient(145deg,#eaf4ff,#f4efff); }
.flip-presentation .app-header,
.flip-presentation .tabs,
.flip-presentation #tab-flip > .panel-head { display: none !important; }
.flip-presentation .app { width: 100%; margin: 0; }
.flip-presentation #tab-flip { max-width: none; min-height: 100vh; margin: 0; padding: 16px 24px; border: 0; border-radius: 0; }
.flip-presentation .flip-toolbar { max-width: 1100px; margin-top: 0; }
.flip-presentation .flip-card { width: min(920px,92vw); height: calc(100vh - 255px); min-height: 390px; }
.flip-presentation .flip-control-dock { width: min(920px,92vw); }
.flip-presentation .flip-word { font-size: clamp(4rem,calc(8vw * var(--flip-font-scale,1)),9rem); }

/* Test */
.preview-test #tab-test { max-width: 940px; margin-inline: auto; }
.preview-test #test-start-area { display: grid; grid-template-columns: 1fr 220px; gap: 16px; align-items: stretch; margin-top: 18px; }
.preview-test .test-count-control { max-width: none; margin: 0; padding: 20px; }
.preview-test #test-start-btn { width: 100%; min-height: 100%; font-size: 1.05rem; }
.preview-test #test-question-area { padding: clamp(22px,4vw,38px); border-radius: 20px; }
.preview-test #test-question-area .word-ja { margin: 16px 0 24px; font-size: clamp(2rem,5vw,3.4rem); text-align: center; }
.preview-test #test-answer { min-height: 58px; font-size: 1.12rem; }

/* Match */
.preview-match #tab-match { max-width: 1080px; margin-inline: auto; }
.preview-match > main {}
.preview-match #match-start-btn { min-width: 240px; }
.preview-match .match-board { padding: 18px; border-radius: 20px; background: linear-gradient(145deg,#f5f9ff,#fbfdff); }
.preview-match .match-status { padding: 10px 14px; border-radius: 12px; background: #eaf3ff; font-size: 1rem; }
.preview-match .match-columns > div { padding: 12px; border: 1px solid #dce7f5; border-radius: 16px; background: rgba(255,255,255,.88); }
.preview-match .match-columns h3 { margin: 0 0 10px; color: #547090; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; }
.preview-match .match-item { border-radius: 14px; box-shadow: 0 5px 13px rgba(31,67,119,.08); }

/* List, data and set management */
.preview-list #tab-list, .preview-set #tab-set, .preview-json #tab-json { max-width: 1080px; margin-inline: auto; }
.preview-list .list-controls { display: grid; grid-template-columns: minmax(240px,1fr) auto; align-items: end; gap: 12px; padding: 16px; }
.preview-list .list-controls > .label { grid-column: 1; }
.preview-list .list-controls > .text-input { grid-column: 1; }
.preview-list .filter-buttons { grid-column: 2; grid-row: 1 / 3; margin: 0; }
.preview-list .table-wrap { max-height: 58vh; border-radius: 16px; box-shadow: 0 8px 24px rgba(30,67,121,.08); }
.preview-list .word-table thead { position: sticky; top: 0; z-index: 2; }
.preview-list .word-table tbody tr:nth-child(even) { background: #f8fbff; }
.preview-list .word-table tbody tr:hover { background: #eef6ff; }
.preview-list .word-table td { padding-block: 12px; }
.preview-json .json-box { max-height: 58vh; padding: 20px; border-radius: 18px; color: #d9e8ff; background: #102348; box-shadow: inset 0 1px 0 rgba(255,255,255,.1); }
.preview-set #tab-set > .list-controls { padding: 18px; border-radius: 18px; background: linear-gradient(145deg,#f7fbff,#fff); }
.preview-set #teacher-lock-box { border-left: 4px solid #f2b72c; }
.preview-set #teacher-tools { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 14px; }
.preview-set #teacher-tools.hidden { display: none; }
.preview-set #teacher-tools > .list-controls { margin: 0; }

/* Wordfall keeps game energy inside the content, not in global navigation. */
.preview-wordfall #tab-wordfall { max-width: 1080px; margin-inline: auto; }
.preview-wordfall .wordfall-panel-head { grid-template-columns: 48px minmax(0,1fr); padding: 18px 20px; border: 0; }
.preview-wordfall .wordfall-panel-head::before { content: "W"; background: rgba(255,255,255,.18); box-shadow: none; }
.preview-wordfall .wordfall-setting-card,
.preview-wordfall .wordfall-exclusion-card { border-radius: 18px; box-shadow: 0 9px 24px rgba(48,47,134,.08); }
.wordfall-exclusion-card { overflow: hidden; }
.wordfall-exclusion-summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; cursor: pointer; list-style: none; }
.wordfall-exclusion-summary::-webkit-details-marker { display: none; }
.wordfall-exclusion-summary h3 { margin: 0 0 5px; }
.wordfall-exclusion-summary .hint { margin: 0; }
.wordfall-exclusion-summary > span { flex: 0 0 auto; padding: 7px 10px; border-radius: 999px; color: #584cc6; background: #ece9ff; font-size: .76rem; font-weight: 850; }
.wordfall-exclusion-summary > span::after { content: " ＋"; }
.wordfall-exclusion-card[open] .wordfall-exclusion-summary > span::after { content: " −"; }
.wordfall-exclusion-body { display: grid; gap: 9px; margin-top: 13px; padding-top: 13px; border-top: 1px solid #dedcf2; }
.wordfall-exclusion-actions { justify-content: flex-end; order: 2; }
.wordfall-quick-summary { margin: 0; color: #5a6380; font-size: .78rem; font-weight: 800; }

.mobile-dock, .mobile-more-sheet, .mobile-more-backdrop, .wordfall-mobile-launch { display: none; }
.preview-toast-region { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: grid; width: min(360px,calc(100% - 36px)); pointer-events: none; }
.preview-toast { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 13px 15px; border: 1px solid rgba(255,255,255,.22); border-radius: 14px; color: #fff; background: #11294a; box-shadow: 0 15px 42px rgba(0,15,40,.3); font-weight: 750; pointer-events: auto; animation: toast-enter .18s ease-out; }
.preview-toast button { min-height: 36px !important; padding: 6px 10px !important; color: #dcebff !important; border-color: #6386b5 !important; background: #1e416c !important; }
.is-busy { position: relative; opacity: .76; }
.is-busy::after { content: ""; display: inline-block; width: 12px; height: 12px; margin-left: 7px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; vertical-align: -2px; animation: busy-spin .7s linear infinite; }
@keyframes toast-enter { from { opacity: 0; transform: translateY(8px); } }
@keyframes busy-spin { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .app-header { grid-template-columns: 1fr; }
  .brand-message { display: none; }
  .header-controls { margin-top: 8px; }
  .mode-grid-primary { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .mode-grid-primary .mode-battle { grid-column: 1 / -1; }
  .mode-grid-secondary { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .home-utilities { grid-template-columns: repeat(3, 1fr); }
  .home-utilities > div { grid-column: 1 / -1; }
  .flip-toolbar { grid-template-columns: 1fr auto; }
  .flip-present-btn { grid-column: 1 / -1; }
  .preview-set #teacher-tools { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  body { background-attachment: scroll; }
  .app { width: min(100% - 16px, 560px); margin-top: 8px; }
  .app-header { display: block; min-height: 0; padding: 8px 10px; border-radius: 16px; }
  .header-top { align-items: center; }
  .header-top { flex-direction: row; }
  .brand-home { grid-template-rows: 94px; width: 180px; min-width: 0; }
  .brand-home img { width: 170px; height: 170px; margin-top: -38px; }
  .brand-home span { display: none; }
  .header-actions { display: block; }
  .tabs-toggle-btn { min-height: 38px; padding: 7px 10px; }
  .header-controls { grid-template-columns: 1fr 1fr; }
  .header-controls > * { padding: 8px 10px; }
  .header-controls > * + * { border-left: 0; }
  .header-controls > .progress-wrap { border-left: 1px solid #dce7f6; }
  .header-side { grid-column: 1 / -1; grid-template-columns: 1fr 1fr; align-items: center; border-top: 1px solid #dce7f6; }
  .sync-status { text-align: right; }
  .header-controls.collapsed { display: none; }
  .home-hero { min-height: 118px; padding: 16px 54px 16px 16px; text-align: left; }
  .home-hero h1 { letter-spacing: .04em; }
  .home-hero > img { right: 4px; width: 62px; height: 62px; }
  .continue-card { grid-template-columns: 38px minmax(0,1fr); gap: 10px; padding: 11px; }
  .continue-icon { width: 38px; height: 38px; }
  .continue-button { grid-column: 1 / -1; width: 100%; min-height: 48px; }
  .mode-grid-primary, .mode-grid-secondary { grid-template-columns: 1fr; }
  .mode-grid-primary .mode-battle { grid-column: auto; }
  .mode-grid-primary .mode-card { grid-template-columns: 96px 1fr auto; min-height: 136px; padding: 10px 12px 10px 4px; }
  .mode-grid-primary .mode-art img { width: 104px; height: 104px; }
  .mode-grid-secondary .mode-card { grid-template-columns: 78px 1fr auto; grid-template-rows: 1fr; align-items: center; min-height: 94px; padding: 8px 12px 8px 2px; }
  .mode-grid-secondary .mode-art img { width: 74px; height: 74px; }
  .mode-grid-secondary .mode-arrow { position: static; }
  .home-utilities { grid-template-columns: 1fr; }
  .home-utilities > div { grid-column: auto; }
  .about-details p { position: static; width: auto; margin-top: 8px; }
  .tabs { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: max-content; justify-content: start; }
  .tab-panel { min-height: 0; padding: 16px 12px; }
  .study-actions { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .study-actions > * { width: 100%; }
  .word-ja { font-size: clamp(1.45rem, 8vw, 2.2rem); }
  body:not(.preview-home) .panel-head { grid-template-columns: 42px minmax(0,1fr); }
  body:not(.preview-home) .panel-head::before { width: 40px; height: 40px; border-radius: 12px; }
  .preview-study .range-controls { grid-template-columns: 1fr; }
  .preview-study .range-controls .hint { text-align: left; }
  .preview-study .study-actions { grid-template-columns: 1fr 1fr; }
  .preview-study #study-check-btn { grid-column: 1 / -1; }
  .flip-toolbar { grid-template-columns: 1fr; }
  .flip-size-controls { grid-template-columns: 1fr 48px 58px 48px; }
  .flip-present-btn { grid-column: auto; }
  .preview-flip .flip-card { height: min(54vh,420px); }
  .preview-flip .flip-word { font-size: clamp(2.6rem,calc(12vw * var(--flip-font-scale,1)),5rem); }
  .flip-actions { grid-template-columns: repeat(3,1fr); }
  #flip-shuffle-btn, #flip-speak-btn { grid-column: auto; }
  .flip-key-hint { font-size: .68rem; }
  .preview-test #test-start-area { grid-template-columns: 1fr; }
  .preview-test #test-start-btn { min-height: 58px; }
  .preview-list .list-controls { grid-template-columns: 1fr; }
  .preview-list .filter-buttons { grid-column: 1; grid-row: auto; }
  .preview-list .filter-buttons button { flex: 1 1 130px; }
  .flip-presentation #tab-flip { padding: 8px; }
  .flip-presentation .flip-toolbar { grid-template-columns: 1fr auto; }
  .flip-presentation .flip-direction-field { display: none; }
  .flip-presentation .flip-present-btn { grid-column: auto; }
  .flip-presentation .flip-card { height: calc(100vh - 185px); min-height: 300px; }
  body:not(.flip-presentation) { padding-bottom: 76px; }
  .mobile-dock {
    position: fixed;
    right: 8px;
    bottom: max(8px,env(safe-area-inset-bottom));
    left: 8px;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(5,minmax(0,1fr));
    gap: 3px;
    padding: 6px;
    border: 1px solid rgba(145,177,220,.42);
    border-radius: 18px;
    background: rgba(249,252,255,.94);
    box-shadow: 0 12px 34px rgba(14,42,83,.24);
    backdrop-filter: blur(15px);
  }
  .mobile-dock button, .mobile-dock a { display: grid; place-items: center; gap: 1px; min-width: 0; min-height: 52px; padding: 4px 2px; border: 0; border-radius: 12px; color: #5d6f8b; background: transparent; font-size: .64rem; font-weight: 800; text-decoration: none; }
  .mobile-dock span { font-size: .9rem; font-weight: 900; }
  .mobile-dock .active { color: #fff; background: linear-gradient(145deg,#3c87f3,#256bd9); }
  .mobile-more-backdrop { position: fixed; inset: 0; z-index: 44; display: block; background: rgba(3,12,27,.42); }
  .mobile-more-backdrop[hidden] { display: none; }
  .mobile-more-sheet { position: fixed; right: 8px; bottom: calc(76px + env(safe-area-inset-bottom)); left: 8px; z-index: 45; display: block; padding: 14px; border: 1px solid #cfdef1; border-radius: 20px; background: #f9fcff; box-shadow: 0 20px 50px rgba(8,32,70,.3); transform: translateY(18px); opacity: 0; pointer-events: none; transition: .18s ease; }
  .mobile-more-sheet.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .mobile-sheet-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
  .mobile-sheet-head button { width: 42px; min-height: 42px; padding: 4px; font-size: 1.25rem; }
  .mobile-sheet-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 7px; }
  .mobile-sheet-grid button { min-height: 48px; }
  .preview-wordfall .wordfall-start-row { display: none; }
  .wordfall-mobile-launch { position: fixed; right: 8px; bottom: calc(76px + env(safe-area-inset-bottom)); left: 8px; z-index: 39; grid-template-columns: auto minmax(0,1fr); gap: 7px; padding: 9px; border: 1px solid #d8d4ff; border-radius: 15px; background: rgba(249,248,255,.96); box-shadow: 0 10px 28px rgba(26,24,77,.22); backdrop-filter: blur(12px); }
  .wordfall-mobile-launch:not([hidden]) { display: grid; }
  .wordfall-mobile-launch p { grid-column: 1 / -1; margin: 0; color: #5a6380; font-size: .72rem; font-weight: 800; }
  .wordfall-mobile-launch button { width: 100%; min-width: 0; min-height: 46px; }
  .wordfall-mobile-launch [data-wordfall-mobile-start] { color: #17143f; border: 0; background: linear-gradient(135deg,#ffe184,#ffb84f); font-weight: 900; }
  .wordfall-exclusion-summary { align-items: flex-start; }
  .wordfall-exclusion-summary > span { font-size: .68rem; }
  .preview-toast-region { right: 10px; bottom: 88px; width: calc(100% - 20px); }
  .flip-presentation .mobile-dock, .flip-presentation .mobile-more-sheet, .flip-presentation .mobile-more-backdrop { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* Theme switch ----------------------------------------------------------- */
.header-actions {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  padding: 8px 12px;
  border: 1px solid #c6d8ee;
  border-radius: 999px;
  color: #194f96;
  background: rgba(247,251,255,.92);
  box-shadow: 0 5px 15px rgba(25,67,124,.1);
  font-size: .78rem;
  font-weight: 850;
  white-space: nowrap;
}
.theme-toggle-icon { font-size: 1.05rem; line-height: 1; }
.theme-toggle:hover { border-color: #78aaf0; background: #fff; }

html[data-theme="dark"] {
  --bg: #071329;
  --card: #101f38;
  --text: #eef5ff;
  --muted: #afc0d8;
  --line: #30435f;
  --preview-ink: #eef5ff;
  --preview-paper: rgba(13, 29, 52, .94);
  --preview-line: rgba(126, 165, 218, .25);
  --preview-shadow: 0 18px 48px rgba(0, 7, 20, .42);
}
html[data-theme="dark"] body {
  background:
    linear-gradient(rgba(4,13,31,.8), rgba(7,18,39,.88)),
    url("assets/ui/backgrounds/bg_hallway_bright.png") center / cover fixed;
}
html[data-theme="dark"] body.preview-home {
  background:
    linear-gradient(rgba(5,15,34,.68), rgba(7,18,39,.8)),
    url("assets/ui/backgrounds/bg_classroom_bright.png") center / cover fixed;
}
html[data-theme="dark"] body.preview-wordfall {
  background:
    linear-gradient(rgba(4,8,29,.66), rgba(5,11,35,.84)),
    url("assets/ui/backgrounds/bg_wordfall_room.png") center / cover fixed;
}
html[data-theme="dark"] body::before { background: linear-gradient(110deg, rgba(41,103,187,.08), rgba(6,11,27,.38)); }
html[data-theme="dark"] .app-header,
html[data-theme="dark"] .header-controls,
html[data-theme="dark"] .tabs,
html[data-theme="dark"] .tab-panel,
html[data-theme="dark"] body:not(.preview-home) .tab-panel {
  border-color: rgba(115,151,202,.28);
  background: rgba(11,25,47,.94);
  box-shadow: var(--preview-shadow);
}
html[data-theme="dark"] .header-controls > * + *,
html[data-theme="dark"] .header-controls > .progress-wrap,
html[data-theme="dark"] .header-side { border-color: #2b3d59; }
html[data-theme="dark"] .set-switcher .label,
html[data-theme="dark"] .progress-text small,
html[data-theme="dark"] .xp-label,
html[data-theme="dark"] .home-utilities > div span,
html[data-theme="dark"] .flip-direction-field,
html[data-theme="dark"] .flip-size-controls,
html[data-theme="dark"] .hint,
html[data-theme="dark"] .sub { color: #aebfd8; }
html[data-theme="dark"] .sync-status { color: #a8bad3; }
html[data-theme="dark"] .home-hero {
  color: #eaf4ff;
  border-color: rgba(121,164,221,.38);
  background:
    linear-gradient(90deg, rgba(8,29,58,.89), rgba(13,34,61,.78), rgba(11,38,70,.9)),
    url("assets/ui/backgrounds/bg_courtyard_bright.png") center 58% / cover;
}
html[data-theme="dark"] .home-hero p { color: #b8cae3; }
html[data-theme="dark"] .home-kicker { color: #72b5ff !important; }
html[data-theme="dark"] .mode-card {
  color: #f3f7ff;
  border-color: rgba(126,162,211,.28);
  box-shadow: 0 15px 34px rgba(0,7,23,.36), inset 0 1px 0 rgba(255,255,255,.06);
}
html[data-theme="dark"] .mode-card::before { background: linear-gradient(145deg, rgba(255,255,255,.08), transparent 55%); }
html[data-theme="dark"] .mode-copy small { color: #bdcce0; }
html[data-theme="dark"] .mode-study { background: linear-gradient(150deg,#173557,#10243f); }
html[data-theme="dark"] .mode-wordfall { background: linear-gradient(150deg,#302961,#1a2141); }
html[data-theme="dark"] .mode-battle { background: linear-gradient(150deg,#54243d,#291a32); }
html[data-theme="dark"] .mode-flip { background: linear-gradient(150deg,#163f38,#102d32); }
html[data-theme="dark"] .mode-test { background: linear-gradient(150deg,#17364d,#10263a); }
html[data-theme="dark"] .mode-match { background: linear-gradient(150deg,#493b20,#292719); }
html[data-theme="dark"] .mode-list { background: linear-gradient(150deg,#332b53,#20233e); }
html[data-theme="dark"] .mode-set { background: linear-gradient(150deg,#143f3d,#102d36); }
html[data-theme="dark"] .home-utilities { border-color: rgba(122,158,207,.26); background: rgba(10,24,45,.9); }
html[data-theme="dark"] .continue-card { border-color: rgba(110,150,204,.3); background: rgba(10,24,45,.92); }
html[data-theme="dark"] .continue-copy p, html[data-theme="dark"] .continue-copy span { color: #aebfd7; }
html[data-theme="dark"] .study-enter-hint { color: #aebfd7; }
html[data-theme="dark"] .study-enter-hint kbd { border-color: #405977; background: #172b46; }
html[data-theme="dark"] .utility-button,
html[data-theme="dark"] .about-details summary,
html[data-theme="dark"] .about-details p,
html[data-theme="dark"] .tabs .battle-nav-link,
html[data-theme="dark"] .tabs .wordfall-tab-btn,
html[data-theme="dark"] .preview-home-btn,
html[data-theme="dark"] .theme-toggle,
html[data-theme="dark"] button:not(.primary-btn):not(.tab-btn):not(.mode-card),
html[data-theme="dark"] .text-input,
html[data-theme="dark"] .direction-select,
html[data-theme="dark"] .range-input,
html[data-theme="dark"] input,
html[data-theme="dark"] select,
html[data-theme="dark"] textarea {
  color: #eaf2ff;
  border-color: #3a5272;
  background: #142640;
}
html[data-theme="dark"] .about-details p { color: #c2d0e3; }
html[data-theme="dark"] .tabs .tab-btn:not(.active) { color: #e4edfa; border-color: #38506f; background: #142640; }
html[data-theme="dark"] .progress-bar-bg { background: #233650; }
html[data-theme="dark"] .study-card,
html[data-theme="dark"] .list-controls,
html[data-theme="dark"] .test-count-control,
html[data-theme="dark"] .range-controls,
html[data-theme="dark"] .preview-study .study-card,
html[data-theme="dark"] .preview-test #test-question-area,
html[data-theme="dark"] .preview-set #tab-set > .list-controls,
html[data-theme="dark"] .preview-match .match-board,
html[data-theme="dark"] .preview-match .match-columns > div,
html[data-theme="dark"] .wordfall-setting-card,
html[data-theme="dark"] .wordfall-exclusion-card {
  color: #edf4ff;
  border-color: #304764;
  background: #11243e;
}
html[data-theme="dark"] .preview-study .word-ja,
html[data-theme="dark"] .preview-flip .flip-word,
html[data-theme="dark"] body:not(.preview-home) .panel-head h2 { color: #f1f6ff; }
html[data-theme="dark"] .flip-toolbar { border-color: #304764; background: #10213a; }
html[data-theme="dark"] .preview-flip .flip-card { border-color: #415f86; background: #0d2039; box-shadow: 0 22px 50px rgba(0,6,20,.48); }
html[data-theme="dark"] .preview-flip .flip-front { background: radial-gradient(circle at 50% 15%,#193657,#0d2039 82%); }
html[data-theme="dark"] .preview-flip .flip-back { background: radial-gradient(circle at 50% 15%,#292852,#151c3d 82%); }
html[data-theme="dark"] .flip-presentation { background: linear-gradient(145deg,#07162b,#17132f); }
html[data-theme="dark"] .preview-match .match-status { background: #183354; }
html[data-theme="dark"] .preview-match .match-columns h3 { color: #a9bdd8; }
html[data-theme="dark"] .preview-list .word-table tbody tr:nth-child(even),
html[data-theme="dark"] .word-table tbody tr:nth-child(even) { background: #112944; }
html[data-theme="dark"] .word-table tbody tr:nth-child(odd) { background: #0e2139; }
html[data-theme="dark"] .preview-list .word-table tbody tr:hover { background: #193959; }
html[data-theme="dark"] .word-table th { color: #eaf3ff; background: #183453; }
html[data-theme="dark"] .word-table td { border-color: #2d4562; }
html[data-theme="dark"] .wordfall-setting-card,
html[data-theme="dark"] .wordfall-exclusion-card { background: linear-gradient(145deg,#11243e,#101c35); }
html[data-theme="dark"] .wordfall-selection-summary > strong,
html[data-theme="dark"] .wordfall-score-rate span:last-child { color: #a99cff; }
html[data-theme="dark"] .wordfall-score-rate { color: #d6d0f2; background: #29254a; }
html[data-theme="dark"] .wordfall-card-option { color: #eaf2ff; border-color: #354b69; background: #152943; }
html[data-theme="dark"] .wordfall-card-copy strong { color: #eef5ff; }
html[data-theme="dark"] .wordfall-card-copy span { color: #b3c3d9; }
html[data-theme="dark"] .wordfall-length-badge { color: #c9c1e9; background: #2c294a; }
html[data-theme="dark"] .wordfall-exclusion-summary > span { color: #c4bbff; background: #2a2850; }
html[data-theme="dark"] .wordfall-exclusion-body { border-color: #364764; }
html[data-theme="dark"] body.preview-wordfall #tab-wordfall { background: rgba(8,19,38,.96); }

@media (max-width: 680px) {
  .header-actions { display: flex; }
  .theme-toggle-label { display: none; }
  .theme-toggle { min-width: 40px; padding-inline: 10px; }
  .preview-list .table-wrap { overflow-x: hidden; }
  .preview-list .word-table { display: block; min-width: 0; }
  .preview-list .word-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .preview-list .word-table tbody { display: grid; gap: 8px; padding: 6px; }
  .preview-list .word-table tbody tr {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    align-items: center;
    min-width: 0;
    padding: 9px 8px;
    border: 1px solid #d8e5f4;
    border-radius: 13px;
  }
  .preview-list .word-table tbody td { min-width: 0; padding: 2px 5px; border: 0; }
  .preview-list .word-table tbody td:nth-child(1) { grid-column: 1; grid-row: 1 / 3; color: var(--muted); font-weight: 800; }
  .preview-list .word-table tbody td:nth-child(2) { grid-column: 2; grid-row: 1; font-weight: 800; }
  .preview-list .word-table tbody td:nth-child(3) { grid-column: 2; grid-row: 2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .preview-list .word-table tbody td:nth-child(4) { grid-column: 3; grid-row: 1; }
  .preview-list .word-table tbody td:nth-child(5) { grid-column: 3; grid-row: 2; }
  .preview-list .word-table tbody td:nth-child(5) button { min-height: 40px; padding: 7px 10px; }
  html[data-theme="dark"] .preview-list .word-table tbody tr { border-color: #304965; }
  html[data-theme="dark"] .mobile-dock, html[data-theme="dark"] .mobile-more-sheet { border-color: #324a69; background: rgba(10,24,45,.96); }
  html[data-theme="dark"] .mobile-dock button, html[data-theme="dark"] .mobile-dock a { color: #b6c7dc; }
  html[data-theme="dark"] .mobile-dock .active { color: #fff; }
  html[data-theme="dark"] .wordfall-mobile-launch { border-color: #3b4770; background: rgba(14,27,51,.97); }
  html[data-theme="dark"] .wordfall-mobile-launch p { color: #bdc9dc; }
  .preview-match .match-board.fullscreen { padding: 8px; --match-board-height: calc(100dvh - 16px); }
  .preview-match .match-board.fullscreen .match-status { padding: 6px 10px; }
  .preview-match .match-board.fullscreen .match-columns {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(2, minmax(0, 1fr));
    gap: 7px;
    min-height: calc(var(--match-board-height) - 46px);
  }
  .preview-match .match-board.fullscreen .match-columns > div { min-height: 0; padding: 7px; }
  .preview-match .match-board.fullscreen .match-columns h3 { margin-bottom: 5px; }
  .preview-match .match-board.fullscreen .match-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(2, minmax(58px, 1fr));
    gap: 6px;
    min-height: 0;
  }
  .preview-match .match-board.fullscreen .match-item {
    min-height: 58px;
    padding: 4px;
    font-size: clamp(.68rem, 3vw, .82rem);
    overflow-wrap: anywhere;
  }
}