window {
   background-color: @bg_base;
   background-image: linear-gradient(160deg, @bg_crust 0%, @bg_base 40%, @bg_surface0 100%);
}
button {
   background-image: none;
}
.app-title {
   color: @fg_text;
   font-weight: 700;
   font-size: 14px;
}
.settings-btn,
.settings-btn:hover,
.settings-btn:active,
.settings-btn:checked,
.settings-btn:focus,
.settings-btn:focus-visible {
   min-width: 34px;
   min-height: 34px;
   padding: 0;
   border-radius: 999px;
   background: transparent;
   background-color: transparent;
   background-image: none;
   border: none;
   outline: none;
   box-shadow: none;
   color: @fg_text;
}
.settings-btn:hover {
   color: @accent;
   background-color: alpha(@bg_surface0, 0.55);
}
.settings-btn:active {
   color: @accent;
   background-color: alpha(@bg_surface1, 0.4);
}
popover,
popover.background,
.settings-popover {
   background: @bg_mantle;
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid @bg_surface1;
   border-radius: 18px;
   box-shadow: 0 18px 40px alpha(@bg_crust, 0.45);
}
popover > contents,
.settings-popover > contents {
   background: transparent;
   background-color: transparent;
   border: none;
   border-radius: 18px;
   box-shadow: none;
   padding: 0;
}
.settings-box {
   background-color: transparent;
   color: @fg_text;
   min-width: 292px;
   padding: 16px 16px 14px 16px;
}
.settings-title {
   color: @fg_text;
   font-size: 17px;
   font-weight: 800;
   letter-spacing: -0.2px;
}
.settings-label {
   color: @fg_overlay;
   font-size: 11px;
   font-weight: 700;
   letter-spacing: 0.8px;
}
.settings-seg {
   background-color: alpha(@bg_surface0, 0.55);
   border: none;
   border-radius: 12px;
   padding: 3px;
}
.mode-chip {
   background-image: none;
   background-color: transparent;
   color: @fg_subtext;
   border: none;
   border-radius: 10px;
   padding: 9px 12px;
   font-size: 13px;
   font-weight: 600;
   min-width: 0;
   box-shadow: none;
   transition: background-color 140ms ease, color 140ms ease,
                box-shadow 140ms ease;
}
.mode-chip:hover {
   background-color: alpha(@bg_surface1, 0.28);
   color: @fg_text;
}
.mode-chip:checked {
   background-image: linear-gradient(135deg, @accent 0%, @accent2 100%);
   color: @on_accent;
   font-weight: 800;
   box-shadow: 0 4px 12px alpha(@accent, 0.25);
}
.mode-chip:checked:hover {
   background-image: linear-gradient(135deg, @accent 0%, @accent2 100%);
   color: @on_accent;
}
.theme-grid {
   background-color: transparent;
   border: none;
   padding: 0;
}
flowboxchild {
   padding: 0;
   margin: 0;
   background: transparent;
   border: none;
   box-shadow: none;
}
.theme-card {
   background-image: none;
   background-color: transparent;
   color: @fg_text;
   border: none;
   border-radius: 12px;
   padding: 6px 4px;
   min-width: 0;
   box-shadow: none;
   transition: background-color 140ms ease;
}
.theme-card:hover {
   background-color: alpha(@bg_surface0, 0.45);
}
.theme-card:checked {
   background-color: transparent;
   box-shadow: none;
}
.theme-card:checked:hover {
   background-color: alpha(@bg_surface0, 0.35);
}
.theme-card-name {
   color: @fg_subtext;
   font-size: 11px;
   font-weight: 600;
}
.theme-card:checked .theme-card-name {
   color: @fg_text;
   font-weight: 700;
}
headerbar,
headerbar.titlebar,
.titlebar {
   background-color: @bg_base;
   background-image: none;
   color: @fg_text;
   box-shadow: none;
   border: none;
}
windowcontrols button:not(:hover) {
   color: @fg_text;
}
windowcontrols button:not(:hover) image {
   color: @fg_text;
}
.heading {
   color: @fg_text;
   font-size: 32px;
   font-weight: 800;
}
.card {
   background-color: alpha(@bg_surface0, 0.92);
   border: 1px solid @bg_surface1;
   border-radius: 18px;
   padding: 30px 34px;
   color: @fg_text;
   font-size: 16px;
}
.btn-primary {
   background-image: linear-gradient(135deg, @accent 0%, @accent2 100%);
   color: @on_accent;
   font-size: 16px;
   font-weight: 700;
   padding: 12px 40px;
   border: none;
   border-radius: 999px;
   box-shadow: 0 6px 18px alpha(@accent, 0.25);
   transition: box-shadow 150ms ease, background-image 150ms ease;
}
.btn-primary:hover {
   box-shadow: 0 8px 24px alpha(@accent, 0.45);
   background-image: linear-gradient(135deg, @accent2 0%, @accent3 100%);
}
.btn-primary:active {
   box-shadow: 0 3px 10px alpha(@accent, 0.35);
}
.roadmap-title {
   color: @fg_text;
   font-size: 28px;
   font-weight: 800;
}
.roadmap-sub {
   color: @fg_subtext;
   font-size: 14px;
}
.back-btn {
   min-width: 42px;
   min-height: 42px;
   padding: 0;
   border-radius: 999px;
   background-color: alpha(@bg_surface0, 0.9);
   border: 1px solid @bg_surface1;
   color: @fg_text;
   box-shadow: 0 4px 14px alpha(@bg_crust, 0.35);
   transition: background-color 150ms ease, color 150ms ease,
                border-color 150ms ease, box-shadow 150ms ease;
}
.back-btn:hover {
   background-color: @bg_surface1;
   border-color: @bg_surface2;
   color: @accent;
   box-shadow: 0 6px 20px alpha(@accent, 0.35);
}
.back-btn:active {
   background-color: @bg_surface0;
   box-shadow: 0 2px 8px alpha(@bg_crust, 0.35);
}
.unit-node {
   background-image: none;
   background-color: @node_bg;
   color: @fg_text;
   border: 2px solid @locked_border;
   border-radius: 999px;
   padding: 0;
   box-shadow: 0 4px 14px alpha(@bg_crust, 0.35);
   transition: transform 150ms ease, box-shadow 150ms ease,
                border-color 150ms ease;
}
.unit-node.done {
   background-image: linear-gradient(135deg, @success 0%, @success2 100%);
   border-color: @success;
   color: @on_accent;
   box-shadow: 0 4px 16px alpha(@success, 0.35);
}
.unit-node.current {
   background-image: linear-gradient(135deg, @accent 0%, @accent2 55%, @accent3 100%);
   border-color: @accent;
   color: @on_accent;
   box-shadow: 0 4px 18px alpha(@accent, 0.5),
               0 0 0 4px alpha(@bg_base, 0.9),
               0 0 0 7px alpha(@accent, 0.45);
}
.unit-node.done:hover,
.unit-node.current:hover {
   transition: box-shadow 150ms ease, border-color 150ms ease;
}
.unit-node.done:hover {
   box-shadow: 0 8px 22px alpha(@success, 0.5);
}
.unit-node.current:hover {
   box-shadow: 0 8px 26px alpha(@accent, 0.65),
               0 0 0 4px alpha(@bg_base, 0.9),
               0 0 0 7px alpha(@accent, 0.55);
}
.unit-node.locked {
   background-image: none;
   background-color: @locked_bg;
   border: 2px solid @locked_border;
   color: @fg_overlay;
   box-shadow: none;
}
.unit-node.locked:hover {
   transform: none;
   box-shadow: none;
}
.unit-node.finish {
   background-color: transparent;
   background-image: none;
   border: none;
   color: @fg_overlay;
   box-shadow: 0 4px 14px alpha(@bg_crust, 0.35);
}
.unit-node.finish:hover {
   transform: none;
   box-shadow: 0 4px 14px alpha(@bg_crust, 0.35);
}
.unit-node:focus,
.unit-node:focus-visible,
.unit-node:hover {
   outline: none;
}
.unit-number {
   font-size: 24px;
   font-weight: 800;
}
.unit-node.done .unit-number,
.unit-node.current .unit-number {
   color: @on_accent;
}
.unit-node.locked .unit-number {
   color: @fg_overlay;
}
.state-icon {
   color: @on_accent;
}
.unit-node.locked .lock-icon {
   color: @bg_surface2;
}
.unit-name {
   color: @fg_text;
   font-size: 13px;
   font-weight: 600;
}
.unit-name-locked {
   color: @fg_overlay;
}
.ex-bubble {
   min-width: 64px;
   min-height: 64px;
   padding: 0;
   border-radius: 999px;
   background-color: @node_bg;
   color: @fg_text;
   border: 2px solid @locked_border;
   box-shadow: 0 4px 14px alpha(@bg_crust, 0.35);
   transition: border-color 150ms ease, box-shadow 150ms ease;
}
.ex-bubble:hover {
   background-image: none;
   border-color: @accent;
   box-shadow: 0 6px 20px alpha(@accent, 0.35);
}
.ex-bubble.done {
   background-image: linear-gradient(135deg, @success 0%, @success2 100%);
   border-color: @success;
   color: @on_accent;
   box-shadow: 0 4px 16px alpha(@success, 0.35);
}
.ex-bubble.done:hover {
   box-shadow: 0 8px 22px alpha(@success, 0.5);
}
.ex-bubble:focus,
.ex-bubble:focus-visible {
   outline: none;
}
.ex-branch {
   border-style: dashed;
   border-color: @accent;
}
.ex-branch:hover {
   border-style: solid;
}
.bubble-number {
   font-size: 22px;
   font-weight: 800;
}
.ex-bubble.done .bubble-number {
   color: @on_accent;
}
.bubble-icon {
   color: @on_accent;
}
.ex-label {
   color: @fg_text;
   font-size: 12px;
   font-weight: 600;
}
.cz-label {
   background-color: @bg_base;
   padding: 1px 6px;
   border-radius: 8px;
}
.ex-prompt {
   color: @fg_text;
   font-size: 16px;
   font-weight: 500;
}
.trans-word {
   color: @fg_text;
   font-size: 24px;
   font-weight: 700;
}
.ex-sub {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 700;
}
.hint {
   color: @fg_subtext;
   font-size: 13px;
   font-style: italic;
}
.meaning {
   color: @fg_subtext;
   font-size: 13px;
   font-style: italic;
}
.u3-answer {
   color: @success;
   font-size: 13px;
   font-weight: 700;
}
.notes-card {
   background-color: alpha(@bg_surface0, 0.9);
   border: 1px solid @bg_surface1;
   border-radius: 24px;
   padding: 24px 34px;
   box-shadow: 0 10px 30px alpha(@bg_crust, 0.20);
}
.notes-kicker {
   color: @accent2;
   font-weight: 800;
   letter-spacing: 2px;
}
.notes-title {
   color: @fg_text;
   font-weight: 800;
}
.notes-body {
   color: @fg_text;
}
.notes-tip {
   color: @success2;
   font-weight: 700;
}
.dlg-speaker {
   color: @accent;
   font-weight: 700;
   font-size: 15px;
}
.number-big {
   color: @warning;
   font-size: 26px;
   font-weight: 800;
}
.hm-word {
   color: @fg_text;
   font-family: monospace;
   font-size: 30px;
   font-weight: 800;
}
.chain {
   color: @warning;
   font-size: 20px;
   font-weight: 700;
   letter-spacing: 1px;
}
entry {
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid @bg_surface1;
   border-radius: 10px;
   padding: 8px 12px;
   font-size: 15px;
   caret-color: @accent;
}
entry:focus {
   border-color: @accent;
}
combobox {
   background-color: @bg_mantle;
   color: @fg_text;
}
combobox button {
   background-image: none;
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid @bg_surface1;
   border-radius: 10px;
   padding: 4px 10px;
}
combobox button:hover {
   background-image: none;
   border-color: @accent;
}
combobox.answer-ok button {
   border-color: @success;
   background-color: alpha(@success, 0.12);
}
combobox.answer-wrong button {
   border-color: @error;
   background-color: alpha(@error, 0.12);
}
entry.answer-ok {
   border-color: @success;
   background-color: alpha(@success, 0.08);
}
entry.answer-wrong {
   border-color: @error;
   background-color: alpha(@error, 0.08);
}
.pill {
   background-image: none;
   background-color: @node_bg;
   color: @fg_text;
   border: 2px solid @locked_border;
   border-radius: 999px;
   padding: 6px 18px;
   font-size: 15px;
   transition: border-color 150ms ease, box-shadow 150ms ease,
                background-color 150ms ease;
}
.pill:hover {
   background-image: none;
   background-color: @node_bg;
   border-color: @accent;
   box-shadow: none;
}
.pill:active {
   background-image: none;
   background-color: @bg_surface1;
   box-shadow: none;
}
.pill:checked {
   background-image: linear-gradient(135deg, @accent 0%, @accent2 100%);
   color: @on_accent;
   border-color: @accent;
   font-weight: 700;
}
.pill.ok,
.pill.ok:checked {
   background-image: linear-gradient(135deg, @success 0%, @success2 100%);
   color: @on_accent;
   border-color: @success;
   box-shadow: 0 0 0 2px alpha(@success, 0.35);
}
.pill.wrong,
.pill.wrong:checked {
   background-image: linear-gradient(135deg, @error 0%, #c45c5c 100%);
   color: @on_accent;
   border-color: @error;
   box-shadow: 0 0 0 2px alpha(@error, 0.35);
}
.pill.hm-key {
   padding: 4px 5px;
   min-width: 32px;
   font-size: 13px;
}
.quiz-card {
   background-color: alpha(@bg_surface0, 0.85);
   border: 1px solid @bg_surface1;
   border-radius: 18px;
   padding: 16px 18px 14px 18px;
   box-shadow: 0 6px 18px alpha(@bg_crust, 0.18);
}
.quiz-heading {
   color: @fg_text;
   font-size: 18px;
   font-weight: 700;
}
.quiz-intro {
   color: @fg_subtext;
   font-size: 14px;
   font-style: italic;
}
.quiz-q {
   color: @fg_text;
   font-size: 16px;
   font-weight: 700;
}
.quiz-options {
   margin-top: 2px;
}
.quiz-pill {
   border-radius: 14px;
   padding: 12px 16px;
   min-height: 44px;
}
.quiz-pill label {
   font-weight: 500;
}
.quiz-pill:checked label {
   font-weight: 700;
}
.chip {
   background-image: none;
   background-color: @bg_surface1;
   color: @fg_text;
   border: 1px solid @bg_surface2;
   border-radius: 999px;
   padding: 6px 14px;
   font-size: 14px;
   font-weight: 600;
   transition: background-color 150ms ease, border-color 150ms ease;
}
.chip:hover {
   background-image: none;
   background-color: @bg_surface2;
   border-color: @accent;
   box-shadow: none;
}
.chip:active {
   background-image: none;
   background-color: @bg_surface2;
   box-shadow: none;
}
.chip.ghost-host {
   opacity: 0;
}
.group-btn {
   background-image: none;
   background-color: @node_bg;
   color: @fg_text;
   border: 2px solid @locked_border;
   border-radius: 12px;
   padding: 8px 18px;
   font-size: 14px;
   font-weight: 700;
   transition: border-color 150ms ease, box-shadow 150ms ease;
}
.group-btn:hover {
   background-image: none;
   background-color: @node_bg;
   border-color: @accent;
   box-shadow: none;
}
.group-btn:active {
   background-image: none;
   background-color: @bg_surface1;
   box-shadow: none;
}
.group-btn:checked {
   background-image: linear-gradient(135deg, @accent3 0%, @success2 100%);
   color: @on_accent;
   border-color: @accent3;
}
.group-panel {
   background-color: alpha(@bg_surface0, 0.5);
   border: 2px dashed @bg_surface1;
   border-radius: 14px;
   padding: 10px;
}
.group-panel-label {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 700;
}
.sent-group {
   background-color: alpha(@bg_surface0, 0.5);
   border: 1px solid @bg_surface1;
   border-radius: 14px;
   padding: 12px;
}
.sent-group.ok {
   border-color: @success;
}
.sent-group.wrong {
   border-color: @error;
}
.feedback-ok {
   color: @success;
   font-size: 15px;
   font-weight: 700;
}
.feedback-err {
   color: @error;
   font-size: 15px;
   font-weight: 700;
}
.feedback-warn {
   color: @warning;
   font-size: 15px;
   font-weight: 700;
}
.stats-page {
   padding: 8px 28px 24px 28px;
}
.stats-summary {
   margin-top: 8px;
   margin-bottom: 18px;
}
.stats-metric {
   background-color: alpha(@bg_surface0, 0.92);
   border: 1px solid @bg_surface1;
   border-radius: 16px;
   padding: 16px 18px;
   min-width: 120px;
}
.stats-metric-value {
   color: @fg_text;
   font-size: 26px;
   font-weight: 800;
   letter-spacing: -0.4px;
}
.stats-metric-label {
   color: @fg_overlay;
   font-size: 11px;
   font-weight: 700;
   letter-spacing: 0.8px;
   margin-top: 4px;
}
.stats-overall-bar,
.stats-overall-bar trough,
.stats-unit-bar,
.stats-unit-bar trough {
   min-height: 10px;
   min-width: 1px;
   border-radius: 6px;
   background-color: alpha(@bg_surface1, 0.85);
   border: none;
   padding: 0;
}
.stats-overall-bar {
   margin-bottom: 22px;
   min-height: 12px;
}
.stats-overall-bar progress,
.stats-unit-bar progress {
   min-width: 1px;
   min-height: 10px;
   border-radius: 6px;
   background-image: linear-gradient(90deg, @accent 0%, @accent2 100%);
   background-color: @accent;
   border: none;
}
.stats-unit-bar.done progress {
   background-image: linear-gradient(90deg, @success 0%, @success2 100%);
   background-color: @success;
}
.stats-section {
   color: @fg_overlay;
   font-size: 11px;
   font-weight: 700;
   letter-spacing: 0.8px;
   margin-bottom: 10px;
}
.stats-subject {
   margin-bottom: 20px;
}
.stats-subject-name {
   color: @fg_text;
   font-size: 16px;
   font-weight: 800;
}
.stats-subject-count {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 700;
}
.stats-subject-count.locked {
   color: @fg_overlay;
}
.stats-subject-bar,
.stats-subject-bar trough {
   min-height: 12px;
   min-width: 1px;
   border-radius: 6px;
   background-color: alpha(@bg_surface1, 0.85);
   border: none;
   padding: 0;
}
.stats-subject-bar {
   margin: 4px 0 0 0;
}
.stats-subject-bar progress {
   min-width: 1px;
   min-height: 10px;
   border-radius: 6px;
   background-image: linear-gradient(90deg, @accent 0%, @accent2 100%);
   background-color: @accent;
   border: none;
}
.stats-units {
   margin-top: 8px;
   border-left: 2px solid alpha(@fg_overlay, 0.22);
   padding-left: 12px;
}
.stats-unit-row {
   background-color: alpha(@bg_surface0, 0.72);
   border: 1px solid @bg_surface1;
   border-radius: 14px;
   padding: 12px 14px;
   margin-bottom: 8px;
}
.stats-unit-row.locked {
   opacity: 0.55;
}
.stats-unit-row.done {
   border-color: alpha(@success, 0.55);
}
.stats-unit-index {
   color: @fg_overlay;
   font-size: 13px;
   font-weight: 700;
   min-width: 22px;
}
.stats-unit-name {
   color: @fg_text;
   font-size: 15px;
   font-weight: 700;
}
.stats-unit-count {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 600;
}
.stats-unit-badge {
   color: @success;
   font-size: 12px;
   font-weight: 700;
}
tooltip {
   background-color: @bg_mantle;
   border: 1px solid @bg_surface1;
   border-radius: 10px;
   color: @fg_text;
}

/* no-scale */
/* Rules below keep a fixed size (symbols/icons) even when the window grows. */
.bubble-number.branch-star {
   font-size: 22px;
}