:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #f3f4f6;
  --text: #1f2937;
  --muted: #57606a;
  --border: #d6dce5;
  --accent: #2d6cdf;
  --accent-soft: #eef4ff;
  --ok: #159947;
  --danger: #c1323f;
  --warning: #b87f10;
  --shadow: 0 10px 26px rgba(16, 24, 40, 0.08);
  --button-bg: #f3f4f6;
  --input-bg: #ffffff;
}

body.dark-mode {
  --bg: #2f2f2f;
  --surface: #3a3a3a;
  --surface-alt: #404040;
  --text: #f3f4f6;
  --muted: #c7c9cf;
  --border: #4a4a4a;
  --accent: #7aa2ff;
  --accent-soft: #434343;
  --ok: #55d08b;
  --danger: #ff7d88;
  --warning: #f2c86d;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  --button-bg: #404040;
  --input-bg: #383838;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--text);
}

h1,
h2,
h3,
p {
  margin: 0;
}

button,
input,
select {
  font: inherit;
}

textarea {
  font: inherit;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg);
  padding: 10px 12px;
  resize: vertical;
  min-height: 42px;
}

button {
  padding: 10px 14px;
  cursor: pointer;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--button-bg);
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

input,
select {
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg);
  padding: 10px 12px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

label {
  color: var(--muted);
  font-size: 14px;
}

.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  white-space: nowrap;
}

.app-nav a {
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  background: var(--surface-alt);
}

.app-nav a.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.app-nav-context {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
}

.logout-top {
  height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--button-bg);
}

.theme-toggle {
  position: relative;
  width: 58px;
  height: 34px;
  padding: 0;
  border-radius: 999px;
  color: transparent;
  font-size: 0;
  overflow: hidden;
  background: var(--surface-alt);
}

.theme-toggle::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--surface);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease;
}

.theme-toggle::after {
  content: "🌞";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 12px;
  color: var(--text);
  transition: transform 0.2s ease;
}

.theme-toggle[aria-checked="true"]::before,
.theme-toggle[aria-checked="true"]::after {
  transform: translateX(26px);
}

.theme-toggle[aria-checked="true"]::after {
  content: "🌚";
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 84px 16px 26px;
}

.app-shell--narrow {
  max-width: 760px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.page-title {
  font-size: clamp(24px, 4vw, 36px);
  letter-spacing: 0.2px;
}

.status-line {
  color: var(--muted);
  font-size: 14px;
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.meta-pill {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr);
  gap: 16px;
}

body[data-page="voting"] .page-grid {
  grid-template-columns: minmax(0, 760px);
  justify-content: center;
}

.stack {
  display: grid;
  gap: 16px;
}

.card {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 10px;
}

.section-title {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.action-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.profile-form {
  display: grid;
  gap: 8px;
}

.profile-disclosure {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--surface-alt);
}

.profile-disclosure summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
}

.profile-disclosure[open] summary {
  margin-bottom: 10px;
}

#editor-replace-wrap {
  margin-top: 10px;
}

.upload-dropzone {
  display: grid;
  gap: 4px;
  justify-items: center;
  text-align: center;
  padding: 16px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: var(--surface-alt);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.upload-dropzone:hover,
.upload-dropzone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.upload-dropzone:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.upload-dropzone-title {
  font-weight: 600;
}

.upload-dropzone-subtitle,
.upload-selected-file {
  color: var(--muted);
  font-size: 14px;
}

#host-quiz-controls {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.setup-panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: var(--surface-alt);
}

#player-setup-panel {
  display: none;
}

.setup-panel-title {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 10px;
}

.setup-grid {
  display: grid;
  gap: 10px;
}

.setup-field {
  display: grid;
  gap: 6px;
}

.setup-field select {
  width: 100%;
}

.setup-grid-readonly {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.setup-overview-item {
  display: grid;
  gap: 4px;
}

.setup-overview-label {
  color: var(--muted);
  font-size: 12px;
}

.setup-overview-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

#question-set-select {
  min-width: 220px;
}

.timer-stepper {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--input-bg);
}

.timer-stepper button {
  border: 0;
  border-radius: 0;
  min-width: 38px;
  height: 40px;
  padding: 0;
  background: var(--button-bg);
}

.timer-stepper-input {
  width: 92px;
  border: 0;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-radius: 0;
  text-align: center;
  padding: 0 8px;
}

.timer-stepper-input::-webkit-outer-spin-button,
.timer-stepper-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.timer-stepper-input[type="number"] {
  -moz-appearance: textfield;
}

#session-code-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

#session-id-input {
  flex: 1;
}

#session-actions,
#menu-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

#question-text {
  margin-top: 10px;
  font-size: 20px;
  line-height: 1.4;
}

#answer-text {
  margin-top: 10px;
  color: var(--muted);
  font-weight: 600;
}

#question-image {
  display: none;
  margin-top: 12px;
  width: min(100%, 640px);
  height: clamp(220px, 38vh, 360px);
  object-fit: contain;
  object-position: center;
  background: var(--surface-alt);
  border-radius: 10px;
  border: 1px solid var(--border);
}

#dynamic-list,
#round-attempt-list,
#question-set-list,
#leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.editor-question-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.editor-item {
  display: grid;
  gap: 8px;
}

.editor-item-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.editor-item-header {
  gap: 8px;
}

.editor-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
}

.editor-expand-icon {
  font-size: 14px;
  line-height: 1;
  color: var(--muted);
}

.editor-item-summary {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.editor-item-top button {
  margin-left: auto;
}

.editor-drag-handle {
  cursor: grab;
  user-select: none;
  color: var(--muted);
}

.editor-item.is-dragging {
  opacity: 0.6;
}

.editor-item.is-dragover {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}

.editor-item.is-collapsed .editor-item-body {
  display: none;
}

.editor-item.is-expanded .editor-item-body {
  display: grid;
  gap: 8px;
}

.editor-image-dropzone {
  padding: 10px;
}

.editor-image-preview-wrap {
  min-height: 8px;
}

.editor-image-preview {
  max-width: min(100%, 360px);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.round-attempt-item {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-alt);
}

.question-set-item-subscribed {
  border-color: var(--ok);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ok) 30%, transparent);
  background: color-mix(in srgb, var(--accent-soft) 35%, var(--surface-alt));
}

.question-set-subscribed-badge {
  display: inline-block;
  margin-top: 2px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--ok);
  color: var(--ok);
  font-weight: 700;
}

.round-attempt-item.is-correct {
  border-color: var(--ok);
}

.round-attempt-item.is-wrong {
  border-color: var(--danger);
}

.leaderboard-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 14px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.leaderboard-item .question-set-item-meta {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 13px;
}

.leaderboard-item-self {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--surface-alt));
}

#leaderboard-search-input {
  width: 100%;
}

#catalog-filter-input {
  width: 100%;
}

.player-list-item {
  display: grid;
  grid-template-columns: auto minmax(max-content, 1fr) auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-alt);
}

.player-list-item > span {
  white-space: nowrap;
}

.player-list-item[data-role="host"] {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.player-list-item[data-connected="false"] {
  opacity: 0.7;
}

.player-list-item.is-clickable {
  cursor: pointer;
}

.player-list-item.is-selected {
  border-color: var(--ok);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ok) 30%, transparent);
}

.player-list-item.is-voted {
  border-color: color-mix(in srgb, var(--ok) 55%, var(--border));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--ok) 20%, transparent);
  background: color-mix(in srgb, var(--ok) 8%, var(--surface-alt));
}

.player-list-item.is-eliminated {
  border-color: var(--danger);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--danger) 35%, transparent);
}

.player-list-item.is-out-of-lives {
  opacity: 0.45;
  filter: grayscale(1);
  box-shadow: none;
  cursor: not-allowed;
}

.player-list-item.is-locked {
  opacity: 0.45;
  cursor: not-allowed;
}

.player-name-group,
.player-tail-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.player-name {
  font-weight: 600;
}

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

.player-voted-status {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ok);
}

.player-votes,
.player-tail-group {
  justify-self: end;
  font-variant-numeric: tabular-nums;
}

.player-connection img {
  display: block;
  width: auto;
  height: 1em;
}

body.login-page {
  min-height: 100vh;
}

.login-shell {
  max-width: 560px;
  margin: 80px auto 24px;
  padding: 0 16px;
}

#login-form,
#register-form {
  display: grid;
  gap: 10px;
}

#login-form[hidden],
#register-form[hidden],
.auth-form[hidden] {
  display: none;
}

.login-grid {
  display: grid;
  gap: 16px;
}

.auth-shell {
  display: grid;
  gap: 16px;
}

.auth-card {
  display: grid;
  gap: 14px;
}

.auth-mode-tabs button {
  min-width: 120px;
}

body.login-page .theme-toggle {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 120;
}

@media (max-width: 1024px) {
  .page-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding-top: 92px;
  }

  .app-nav-context {
    display: none;
  }

  .page-title {
    font-size: 24px;
  }

  #question-text {
    font-size: 18px;
  }
}