:root {
  --bg: #121c23;
  --ink: #f7fbff;
  --muted: #b9c8d6;
  --line: #354655;
  --panel: #19242d;
  --panel-soft: #22303b;
  --field: #0b1218;
  --zoom-dark: #0d141a;
  --accent: #d8a64a;
  --accent-strong: #f0c66e;
  --danger: #e0504f;
  --pay: #d8a64a;
  --line-green: #06c755;
  --ok: #51d68a;
  --shadow: rgba(3, 8, 13, 0.36);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #10181f 0, var(--bg) 220px),
    var(--bg);
  font-family: "Microsoft JhengHei", "PingFang TC", Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

a {
  color: inherit;
}

.shell {
  min-height: 100vh;
  padding: 30px 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: -30px -24px 22px;
  padding: 30px 24px 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 3px solid var(--accent);
  background: #152029;
}

.topbar > div:first-child {
  position: relative;
  min-height: 60px;
  padding-left: 82px;
}

.topbar > div:first-child::before {
  content: "字";
  position: absolute;
  left: 0;
  top: 2px;
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #071018;
  background: linear-gradient(135deg, #f1c66f, #c99136);
  font-size: 30px;
  font-weight: 900;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 12px 24px rgba(0, 0, 0, 0.24);
}

.title {
  margin: 0;
  color: #fff;
  font-size: 32px;
  font-weight: 900;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.42);
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 10px;
}

.nav a,
.ghost,
.primary,
.danger {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.nav a:hover,
.ghost:hover,
.primary:hover,
.danger:hover,
.toggle-action:hover {
  transform: translateY(-1px);
}

.nav a,
.ghost {
  color: var(--ink);
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.primary {
  color: #101820;
  background: var(--pay);
  font-weight: 800;
}

.danger {
  color: #fff;
  background: var(--danger);
  font-weight: 800;
}

.toggle-action {
  color: var(--ink);
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 800;
}

.toggle-action.is-active {
  color: #101820;
  background: var(--pay);
  border-color: var(--pay);
  box-shadow: 0 8px 18px rgba(221, 171, 71, 0.18);
}

.teacher-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  border-radius: 8px;
  padding: 18px;
  box-shadow: 0 18px 44px var(--shadow);
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 20px;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.field label {
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  padding: 10px 12px;
  background: var(--field);
}

.setting-details {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.setting-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 0 12px;
  color: var(--accent-strong);
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.setting-details summary::-webkit-details-marker {
  display: none;
}

.setting-details summary::before {
  content: "▸";
  color: var(--accent-strong);
  transform: rotate(0deg);
  transition: transform 0.18s ease;
}

.setting-details[open] summary::before {
  transform: rotate(90deg);
}

.setting-details summary span:first-child {
  margin-right: auto;
}

.settings-body {
  padding: 0 12px 12px;
}

.setting-group {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
  border: 1px solid rgba(240, 198, 110, 0.18);
  border-radius: 8px;
  padding: 12px;
  background: rgba(11, 18, 24, 0.48);
}

.setting-group:last-child {
  margin-bottom: 0;
}

.setting-group h3 {
  margin: 0;
  color: var(--accent-strong);
  font-size: 15px;
}

.setting-group .field {
  margin-bottom: 0;
}

.setting-group .field + .field,
.setting-group .field + .check-field {
  margin-top: 10px;
}

.check-field {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--field);
  font-weight: 800;
  cursor: pointer;
}

.check-field input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.status-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--panel-soft);
}

.metric strong {
  display: block;
  color: var(--accent-strong);
  font-size: 24px;
}

.student-classroom {
  min-height: 100vh;
  padding: 18px;
  background:
    linear-gradient(180deg, #101820 0, #141f27 250px, #0d141a 100%),
    var(--bg);
}

.classroom-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1440px;
  margin: 0 auto 14px;
  padding: 10px 2px;
}

.classroom-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--text);
  background: rgba(35, 49, 60, 0.86);
  font-weight: 800;
}

.classroom-link {
  margin-left: auto;
}

.zoom-test-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(180deg, #101820 0, #141f27 260px, #0d141a 100%),
    var(--bg);
}

.zoom-test-card {
  width: min(760px, 100%);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  border-radius: 8px;
  padding: 24px;
  background: var(--panel);
  box-shadow: 0 20px 44px var(--shadow);
}

.zoom-test-form {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.zoom-test-form label {
  display: grid;
  gap: 8px;
  color: var(--accent-strong);
  font-weight: 900;
}

.zoom-test-form input,
.zoom-test-form select {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--text);
  background: #091016;
  font: inherit;
}

.zoom-test-form .full {
  width: 100%;
  min-height: 50px;
}

.zoom-test-form .ghost.full {
  justify-content: center;
}

.zoom-remember-row {
  color: var(--text);
}

.time-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.time-inputs label {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.time-inputs span {
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 800;
}

.form-status {
  min-height: 22px;
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

.zoom-sdk-page {
  min-height: 100vh;
  margin: 0;
  background: #05080c;
}

.zoom-sdk-loading {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: grid;
  place-content: center;
  gap: 8px;
  padding: 24px;
  color: var(--text);
  background: var(--bg);
  text-align: center;
}

.zoom-sdk-loading[hidden] {
  display: none;
}

.zoom-sdk-loading pre {
  max-width: min(760px, calc(100vw - 32px));
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  color: var(--muted);
  background: #091016;
  text-align: left;
}

.zoom-sdk-sale-layer {
  position: fixed;
  inset: 52px 0 110px;
  z-index: 2147483647 !important;
  pointer-events: none;
}

.zoom-sdk-sale-layer[hidden] {
  display: none;
}

.zoom-sdk-sale-layer .sale-stack--bottom {
  bottom: 0;
}

.zoom-sdk-sale-layer .sale-banner.sale-size--normal {
  width: min(620px, calc(100% - 42px));
  min-height: 72px;
  grid-template-columns: 106px 1fr auto;
  gap: 12px;
}

.zoom-sdk-sale-layer .sale-copy h3 {
  font-size: 18px;
  margin-bottom: 2px;
}

.zoom-sdk-sale-layer .sale-copy p {
  margin-bottom: 4px;
  font-size: 13px;
}

.zoom-sdk-sale-layer .new-price {
  font-size: 24px;
}

.zoom-sdk-sale-layer .chip {
  padding: 3px 8px;
  font-size: 11px;
}

.zoom-sdk-sale-layer .pay-button {
  min-width: 92px;
  height: 38px;
  white-space: nowrap;
}

.zoom-sdk-sale-layer .sale-banner.sale-size--compact {
  grid-template-columns: 96px minmax(0, 1fr) auto;
}

.zoom-sdk-sale-layer .sale-banner.sale-size--compact .pay-button {
  min-width: 82px;
  padding-inline: 10px;
}

.zoom-sdk-sale-layer .sale-banner.sale-size--square {
  width: min(280px, calc(100% - 28px));
  min-height: 280px;
  grid-template-columns: 1fr;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: #20d466;
  box-shadow: 0 0 0 5px rgba(32, 212, 102, 0.14);
}

.stage,
.classroom-stage {
  min-height: calc(100vh - 112px);
  max-width: 1440px;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  background: var(--zoom-dark);
  box-shadow: 0 20px 44px rgba(3, 8, 13, 0.44);
}

.zoom-frame {
  position: relative;
  min-height: calc(100vh - 112px);
  color: #fff;
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.07), transparent 22%),
    linear-gradient(135deg, rgba(241, 194, 107, 0.08), transparent 38%),
    #10161c;
}

.zoom-header {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: #202b34;
  font-size: 14px;
}

.meeting-title {
  color: #d8e3ec;
  font-weight: 700;
}

.recording-pill {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 3px 8px;
  color: #fff;
  background: rgba(239, 68, 68, 0.72);
  font-size: 12px;
  font-weight: 900;
}

.share-area {
  position: absolute;
  inset: 44px 250px 66px 0;
  display: grid;
  place-items: center;
  padding: 28px;
}

.share-card {
  width: min(520px, 78%);
  aspect-ratio: 1.22;
  display: grid;
  align-content: center;
  place-items: center;
  gap: 8px;
  border: 12px solid #050607;
  border-radius: 20px;
  background:
    radial-gradient(circle at 72% 18%, rgba(241, 194, 107, 0.22), transparent 24%),
    #1e1e1e;
  color: #fff;
  font-size: 34px;
  font-weight: 900;
  letter-spacing: 0;
}

.share-mark {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border-radius: 18px;
  color: #101820;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-size: 30px;
  font-weight: 1000;
}

.share-card small {
  color: #c7d4df;
  font-size: 15px;
  font-weight: 700;
}

.participant-strip {
  position: absolute;
  top: 64px;
  right: 18px;
  bottom: 86px;
  width: 214px;
  display: grid;
  grid-auto-rows: 120px;
  gap: 12px;
  pointer-events: none;
}

.participant-card {
  display: grid;
  align-content: end;
  gap: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 12px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.12), transparent 50%),
    #27343e;
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

.participant-card.is-speaking {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(241, 194, 107, 0.18), 0 10px 24px rgba(0, 0, 0, 0.24);
}

.participant-card span {
  color: #c9d6df;
  font-size: 12px;
  font-weight: 800;
}

.participant-card strong {
  font-size: 17px;
}

.zoom-toolbar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 66px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: #050505;
  color: #e6edf5;
  font-size: 13px;
}

.sale-banner {
  position: absolute;
  left: 50%;
  bottom: 88px;
  width: min(760px, calc(100% - 42px));
  min-height: 82px;
  display: grid;
  grid-template-columns: 120px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 10px 14px 10px 10px;
  border: 2px solid var(--accent);
  border-radius: 8px;
  background: #f8faf7;
  color: var(--ink);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
  transform: translate(-50%, 18px);
  transform-origin: center;
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms ease, opacity 220ms ease;
  box-sizing: border-box;
  container-type: inline-size;
  overflow: hidden;
}

.sale-copy {
  min-width: 0;
}

.sale-copy h3,
.sale-copy p,
.prices {
  min-width: 0;
}

.sale-copy h3,
.sale-copy p {
  overflow-wrap: anywhere;
}

.sale-layer {
  position: absolute;
  inset: 42px 0 66px;
  pointer-events: none;
  z-index: 2;
}

.sale-stack {
  position: absolute;
  width: min(760px, calc(100% - 42px));
  display: grid;
  gap: 10px;
  pointer-events: none;
}

.sale-stack--bottom {
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
}

.sale-stack--top {
  left: 50%;
  top: 22px;
  transform: translateX(-50%);
}

.sale-stack--right {
  right: 22px;
  bottom: 22px;
  width: min(360px, calc(100% - 42px));
}

.sale-stack--left {
  left: 22px;
  top: 50%;
  width: min(360px, calc(100% - 42px));
  transform: translateY(-50%);
}

.sale-stack--bottom-left,
.sale-stack--bottom-right,
.sale-stack--top-left,
.sale-stack--top-right {
  width: min(390px, calc(100% - 42px));
}

.sale-stack--bottom-left {
  left: 22px;
  bottom: 22px;
}

.sale-stack--bottom-right {
  right: 22px;
  bottom: 22px;
}

.sale-stack--top-left {
  left: 22px;
  top: 22px;
}

.sale-stack--top-right {
  right: 22px;
  top: 22px;
}

.sale-stack--center {
  left: 50%;
  top: 50%;
  width: min(620px, calc(100% - 42px));
  transform: translate(-50%, -50%);
}

.sale-stack .sale-banner {
  position: relative;
  left: auto;
  bottom: auto;
  width: 100%;
  transform: translateY(18px);
}

.sale-banner.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
  animation: banner-shake-bottom 1.4s ease-in-out infinite;
}

.sale-stack .sale-banner.is-visible {
  transform: translateY(0);
  pointer-events: auto;
  animation: banner-shake-stack 1.4s ease-in-out infinite;
}

.sale-banner.sale-no-shake.is-visible,
.sale-stack .sale-banner.sale-no-shake.is-visible {
  animation: none;
}

.sale-banner.sale-placement--top {
  top: 22px;
  bottom: auto;
}

.sale-banner.sale-placement--right {
  left: auto;
  right: 22px;
  bottom: 88px;
  width: min(360px, calc(100% - 42px));
  grid-template-columns: 1fr;
  transform: translate(0, 18px);
}

.sale-banner.sale-placement--right.is-visible {
  transform: translate(0, 0);
  animation-name: banner-shake-right;
}

.sale-banner.sale-placement--left,
.sale-banner.sale-placement--bottom-left,
.sale-banner.sale-placement--bottom-right,
.sale-banner.sale-placement--top-left,
.sale-banner.sale-placement--top-right {
  width: min(390px, calc(100% - 42px));
  grid-template-columns: 1fr;
  transform: translate(0, 18px);
}

.sale-banner.sale-placement--left {
  left: 22px;
  top: 50%;
  bottom: auto;
  transform: translate(0, calc(-50% + 18px));
}

.sale-banner.sale-placement--left.is-visible {
  transform: translate(0, -50%);
  animation-name: banner-shake-left;
}

.sale-banner.sale-placement--bottom-left {
  left: 22px;
  bottom: 88px;
}

.sale-banner.sale-placement--bottom-right {
  left: auto;
  right: 22px;
  bottom: 88px;
}

.sale-banner.sale-placement--top-left {
  left: 22px;
  top: 22px;
  bottom: auto;
}

.sale-banner.sale-placement--top-right {
  left: auto;
  right: 22px;
  top: 22px;
  bottom: auto;
}

.sale-banner.sale-placement--bottom-left.is-visible,
.sale-banner.sale-placement--bottom-right.is-visible,
.sale-banner.sale-placement--top-left.is-visible,
.sale-banner.sale-placement--top-right.is-visible {
  transform: translate(0, 0);
  animation-name: banner-shake-right;
}

.sale-banner.sale-placement--center {
  top: 50%;
  bottom: auto;
  width: min(620px, calc(100% - 42px));
  transform: translate(-50%, calc(-50% + 18px));
}

.sale-banner.sale-placement--center.is-visible {
  transform: translate(-50%, -50%);
  animation-name: banner-shake-center;
}

.sale-banner.sale-placement--custom {
  left: var(--sale-x, 50%);
  top: var(--sale-y, 78%);
  bottom: auto;
  width: clamp(300px, var(--sale-width, 760px), calc(100% - 42px));
  transform: translate(0, 18px);
  transform-origin: top left;
}

.sale-banner.sale-placement--custom.is-visible {
  transform: translate(0, 0) scale(var(--sale-scale, 1));
  animation-name: banner-shake-custom;
}

.teacher-preview-layer .sale-banner.sale-placement--custom {
  width: var(--sale-width, 760px);
}

.sale-banner.sale-shape--rounded {
  border-radius: 14px;
}

.sale-banner.sale-shape--rectangle {
  border-radius: 5px;
}

.sale-banner.sale-shape--rectangle .sale-badge,
.sale-banner.sale-shape--rectangle .pay-button {
  border-radius: 5px;
}

.sale-banner.sale-shape--square {
  width: var(--sale-width, 320px);
  min-height: 0;
  aspect-ratio: 1;
  grid-template-columns: 1fr;
  align-content: stretch;
  gap: 10px;
  padding: 12px;
}

.sale-banner.sale-shape--square .sale-badge {
  min-height: 86px;
}

.sale-banner.sale-shape--square .prices {
  display: grid;
  gap: 4px;
}

.sale-banner.sale-shape--square .pay-button {
  width: 100%;
}

.sale-banner.sale-shape--circle {
  width: var(--sale-width, 300px);
  min-height: 0;
  aspect-ratio: 1;
  border-radius: 50%;
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
  padding: 24px;
}

.sale-banner.sale-shape--circle .sale-badge {
  width: 112px;
  min-height: 112px;
  border-radius: 50%;
}

.sale-banner.sale-shape--circle .prices,
.sale-banner.sale-shape--circle .chips {
  justify-content: center;
}

.sale-banner.sale-shape--circle .pay-button {
  width: 100%;
  border-radius: 999px;
}

.sale-banner.sale-preview {
  cursor: grab;
  touch-action: none;
}

.sale-banner.sale-preview.is-dragging {
  cursor: grabbing;
  animation: none;
}

.sale-banner.sale-preview.is-visible {
  animation: none;
  transform: translate(0, 0) scale(var(--sale-scale, 1));
}

.sale-resize-handle {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  cursor: nwse-resize;
  z-index: 3;
}

.sale-resize-handle--nw {
  left: -9px;
  top: -9px;
  cursor: nwse-resize;
}

.sale-resize-handle--ne {
  right: -9px;
  top: -9px;
  cursor: nesw-resize;
}

.sale-resize-handle--sw {
  left: -9px;
  bottom: -9px;
  cursor: nesw-resize;
}

.sale-resize-handle--se {
  right: -9px;
  bottom: -9px;
  cursor: nwse-resize;
}

.sale-resize-handle::before,
.sale-resize-handle::after {
  content: "";
  display: none;
}

.sale-resize-handle::after {
  right: 2px;
  bottom: 8px;
}

.sale-banner.sale-size--compact {
  min-height: 58px;
  grid-template-columns: 82px 1fr auto;
  gap: 10px;
  padding: 8px;
}

.sale-banner.sale-size--compact .sale-copy h3 {
  font-size: 16px;
  margin-bottom: 2px;
}

.sale-banner.sale-size--compact .sale-copy p {
  display: none;
}

.sale-banner.sale-size--compact .new-price {
  font-size: 20px;
}

.sale-banner.sale-size--compact .chip {
  padding: 3px 8px;
  font-size: 11px;
}

.sale-banner.sale-size--compact .pay-button {
  min-width: 92px;
  height: 34px;
}

.sale-banner.sale-size--large {
  width: min(900px, calc(100% - 42px));
  min-height: 108px;
  grid-template-columns: 150px 1fr auto;
}

.sale-banner.sale-size--large .sale-copy h3 {
  font-size: 26px;
}

.sale-banner.sale-size--large .new-price {
  font-size: 34px;
}

.sale-banner.sale-size--square {
  width: min(300px, calc(100% - 42px));
  min-height: 300px;
  grid-template-columns: 1fr;
  align-content: stretch;
  gap: 10px;
  padding: 12px;
}

.sale-banner.sale-size--square .sale-badge {
  min-height: 86px;
}

.sale-banner.sale-size--square .sale-copy h3 {
  font-size: 20px;
}

.sale-banner.sale-size--square .prices {
  display: grid;
  gap: 4px;
}

.sale-banner.sale-size--square .new-price {
  font-size: 30px;
}

.sale-banner.sale-size--square .pay-button {
  width: 100%;
}

.sale-banner.sale-shape--square {
  width: var(--sale-width, 320px);
  min-height: 0;
  aspect-ratio: 1;
  grid-template-columns: 1fr;
}

.sale-banner.sale-shape--circle {
  width: var(--sale-width, 300px);
  min-height: 0;
  aspect-ratio: 1;
  border-radius: 50%;
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
  padding: 24px;
}

.sale-banner.sale-shape--circle .sale-badge {
  width: 112px;
  min-height: 112px;
  border-radius: 50%;
}

.sale-banner.sale-shape--circle .prices,
.sale-banner.sale-shape--circle .chips {
  justify-content: center;
}

.sale-banner.sale-shape--circle .pay-button {
  width: 100%;
  border-radius: 999px;
}

@keyframes banner-shake-bottom {
  0%, 100% { transform: translate(-50%, 0) rotate(0deg); }
  20% { transform: translate(-50%, -4px) rotate(-0.55deg); }
  42% { transform: translate(-50%, 2px) rotate(0.45deg); }
  64% { transform: translate(-50%, -2px) rotate(-0.28deg); }
}

@keyframes banner-shake-right {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  20% { transform: translate(0, -4px) rotate(-0.55deg); }
  42% { transform: translate(0, 2px) rotate(0.45deg); }
  64% { transform: translate(0, -2px) rotate(-0.28deg); }
}

@keyframes banner-shake-left {
  0%, 100% { transform: translate(0, -50%) rotate(0deg); }
  20% { transform: translate(0, calc(-50% - 4px)) rotate(-0.55deg); }
  42% { transform: translate(0, calc(-50% + 2px)) rotate(0.45deg); }
  64% { transform: translate(0, calc(-50% - 2px)) rotate(-0.28deg); }
}

@keyframes banner-shake-center {
  0%, 100% { transform: translate(-50%, -50%) rotate(0deg); }
  20% { transform: translate(-50%, calc(-50% - 4px)) rotate(-0.55deg); }
  42% { transform: translate(-50%, calc(-50% + 2px)) rotate(0.45deg); }
  64% { transform: translate(-50%, calc(-50% - 2px)) rotate(-0.28deg); }
}

@keyframes banner-shake-custom {
  0%, 100% { transform: translate(0, 0) scale(var(--sale-scale, 1)) rotate(0deg); }
  20% { transform: translate(0, -4px) scale(var(--sale-scale, 1)) rotate(-0.55deg); }
  42% { transform: translate(0, 2px) scale(var(--sale-scale, 1)) rotate(0.45deg); }
  64% { transform: translate(0, -2px) scale(var(--sale-scale, 1)) rotate(-0.28deg); }
}

@keyframes banner-shake-stack {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  20% { transform: translateY(-4px) rotate(-0.55deg); }
  42% { transform: translateY(2px) rotate(0.45deg); }
  64% { transform: translateY(-2px) rotate(-0.28deg); }
}

.sale-design--classic {
  background: #f8faf7;
}

.sale-design--dark {
  border-color: var(--accent-strong);
  background: #111820;
  color: #fff;
}

.sale-design--dark .sale-badge {
  background: linear-gradient(135deg, #f1c66f, #b97b28);
  color: #081018;
}

.sale-design--dark .sale-copy h3,
.sale-design--dark .new-price {
  color: #fff;
}

.sale-design--dark .sale-copy p,
.sale-design--dark .old-price {
  color: #b9c8d6;
}

.sale-design--dark .prices span:not(.old-price):not(.new-price) {
  color: var(--accent-strong);
}

.sale-design--dark .chip {
  background: rgba(240, 198, 110, 0.15);
  color: var(--accent-strong);
  border: 1px solid rgba(240, 198, 110, 0.32);
}

.sale-design--dark .chip.ok {
  background: rgba(81, 214, 138, 0.12);
  color: #79e6a4;
  border-color: rgba(81, 214, 138, 0.28);
}

.sale-design--clean {
  border-color: #e8d6ad;
  background: #fffdf7;
  box-shadow: 0 14px 34px rgba(3, 8, 13, 0.24);
}

.sale-design--clean .sale-badge {
  background: #111820;
  color: var(--accent-strong);
}

.sale-design--clean .pay-button {
  color: #fff;
  background: #111820;
}

.sale-design--slim {
  min-height: 64px;
  grid-template-columns: auto 1fr auto;
  border-width: 1px;
  border-color: rgba(240, 198, 110, 0.7);
  background: #111820;
  color: #fff;
}

.sale-design--slim .sale-badge {
  min-width: 78px;
  background: transparent;
  color: var(--accent-strong);
  border: 1px solid rgba(240, 198, 110, 0.38);
}

.sale-design--slim .sale-copy h3,
.sale-design--slim .new-price {
  color: #fff;
}

.sale-design--slim .sale-copy p {
  display: none;
}

.sale-design--slim .chips {
  margin-top: 4px;
}

.sale-design--glass {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(17, 24, 32, 0.78);
  color: #fff;
  backdrop-filter: blur(12px);
}

.sale-design--glass .sale-badge {
  background: rgba(240, 198, 110, 0.92);
  color: #101820;
}

.sale-design--glass .sale-copy h3,
.sale-design--glass .new-price {
  color: #fff;
}

.sale-design--glass .sale-copy p,
.sale-design--glass .old-price {
  color: #d8e2ec;
}

.sale-design--glass .chip {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.sale-design--glass .chip.ok {
  color: #94f0b8;
}

.sale-badge {
  align-self: stretch;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: var(--accent);
  color: #111820;
  text-align: center;
  font-weight: 900;
}

.sale-copy h3 {
  margin: 0 0 4px;
  color: #111820;
  font-size: 20px;
}

.sale-copy p {
  margin: 0;
  color: #566473;
  font-size: 14px;
}

.prices {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 6px;
}

.old-price {
  color: #6b7785;
  text-decoration: line-through;
}

.new-price {
  color: #c43736;
  font-size: 26px;
  font-weight: 900;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 7px;
}

.chip {
  border-radius: 999px;
  padding: 4px 10px;
  background: #fff1c9;
  color: #76510f;
  font-size: 12px;
  font-weight: 800;
}

.chip.ok {
  background: #e8f8ed;
  color: #167a3f;
}

.pay-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 124px;
  height: 42px;
  border: 0;
  border-radius: 8px;
  color: #101820;
  background: var(--pay);
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  box-sizing: border-box;
  max-width: 100%;
  white-space: nowrap;
}

.teacher-preview-layer .sale-banner.sale-shape--circle {
  width: var(--sale-width, 300px);
  min-width: 0;
  min-height: 0;
}

.teacher-preview-layer .sale-banner.sale-shape--square {
  width: var(--sale-width, 320px);
  min-width: 0;
  min-height: 0;
}

.preview-frame {
  margin-top: 12px;
}

.payments {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  height: 280px;
  overflow-x: auto;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  overscroll-behavior: contain;
  background: var(--field);
}

.payment-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}

.payment-tools h3 {
  margin: 0;
  font-size: 16px;
}

.payment-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.export-link {
  min-height: 36px;
  padding: 8px 12px;
  text-decoration: none;
}

.danger-ghost {
  min-height: 36px;
  padding: 8px 12px;
  color: #ffd7d7;
  border-color: rgba(224, 80, 79, 0.55);
}

.payment-summary {
  display: grid;
  gap: 8px;
  margin-top: 10px;
  max-height: 220px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--panel-soft);
}

.summary-item span {
  color: var(--accent-strong);
  font-weight: 900;
  white-space: nowrap;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 12px;
  color: var(--muted);
  background: var(--field);
}

.payment-details {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.payment-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 46px;
  padding: 0 12px;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.payment-details summary::-webkit-details-marker {
  display: none;
}

.payment-details summary::before {
  content: "▸";
  color: var(--accent-strong);
  transform: rotate(0deg);
  transition: transform 0.18s ease;
}

.payment-details[open] summary::before {
  transform: rotate(90deg);
}

.payment-details summary span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-right: auto;
}

.payment-details summary strong {
  color: var(--accent-strong);
}

.detail-hint {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.payment-details .payments {
  margin: 0 12px 12px;
  min-height: 280px;
  max-height: 280px;
}

.summary-details .payment-summary {
  margin: 0 12px 12px;
  padding-right: 4px;
}

.payment-table {
  width: 100%;
  min-width: 780px;
  border-collapse: collapse;
  overflow: hidden;
  background: var(--field);
}

.payment-table th,
.payment-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 14px;
}

.payment-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  color: var(--accent-strong);
  background: #17222b;
  font-weight: 800;
}

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

.product-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.product-pill {
  display: grid;
  gap: 2px;
  min-width: 150px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--panel-soft);
  text-align: left;
  cursor: pointer;
}

.product-pill span {
  color: var(--muted);
  font-size: 13px;
}

.product-pill.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(216, 166, 74, 0.2);
}

.product-pill.is-active {
  border-color: var(--ok);
  background: #183226;
}

.payment-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--panel-soft);
}

.pay-page,
.success-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(180deg, #10181f 0, var(--bg) 220px),
    var(--bg);
}

.checkout-card {
  width: min(480px, 100%);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent);
  border-radius: 8px;
  padding: 22px;
  background: var(--panel);
  box-shadow: 0 18px 44px var(--shadow);
}

.checkout-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 14px;
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--panel-soft);
}

.checkout-summary span {
  color: var(--muted);
  font-weight: 700;
}

.checkout-summary strong {
  color: var(--accent-strong);
}

.success-summary {
  margin-bottom: 18px;
}

.payment-notice {
  display: grid;
  gap: 6px;
  margin: 18px 0;
  border: 1px solid rgba(241, 194, 107, 0.42);
  border-radius: 8px;
  padding: 14px;
  color: var(--text);
  background: rgba(241, 194, 107, 0.12);
}

.payment-notice strong {
  color: var(--accent-strong);
}

.payment-notice span {
  color: var(--muted);
}

.line-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
  min-height: 48px;
  border-radius: 4px;
  padding: 8px 16px;
  color: #fff;
  background: var(--line-green);
  text-decoration: none;
  font-weight: 900;
}

.line-logo {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 34px;
  border-radius: 50%;
  color: var(--line-green);
  background: #fff;
  font-size: 12px;
  font-weight: 900;
}

.line-logo::after {
  content: "";
  position: absolute;
  left: 20px;
  bottom: -7px;
  border-width: 10px 5px 0 5px;
  border-style: solid;
  border-color: #fff transparent transparent transparent;
  transform: rotate(-28deg);
}

@media (max-width: 980px) {
  .student-classroom {
    padding: 12px;
  }

  .classroom-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .classroom-stage,
  .zoom-frame {
    min-height: calc(100vh - 136px);
  }

  .share-area {
    inset: 44px 0 176px;
  }

  .share-card {
    width: min(420px, 86%);
    font-size: 26px;
  }

  .participant-strip {
    top: auto;
    left: 12px;
    right: 12px;
    bottom: 78px;
    width: auto;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: 86px;
  }

  .participant-card {
    padding: 10px;
  }

  .zoom-toolbar {
    gap: 12px;
    overflow-x: auto;
    justify-content: flex-start;
    padding: 0 12px;
  }

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

}