/* Interface stylesheet.
 *
 * theme.c prepends the @define-color bindings of the active palette before
 * this file is parsed, so nothing here names a literal colour: the rules
 * describe shape, spacing and type only, and every palette stays swappable.
 *
 * Keep to the scales below when adding rules.
 *
 *   type     12 caption | 13 small | 15 body | 17 lead | 20 26 30 headings
 *   weight   400 body | 500 emphasis | 600 controls and labels | 700 headings
 *   radius   8 controls | 12 rows and cards | 16 popovers | 999 circles
 *   motion   120ms colour | 150ms elevation
 *
 * Fills are flat and elevation is neutral; accent colour marks state, never
 * decoration. Rules below the no-scale marker at the end of the file keep a
 * fixed font size while the rest grows with the window.
 */

/* ------------------------------------------------------------------ */
/* Window chrome                                                      */
/* ------------------------------------------------------------------ */

window {
   background-color: @bg_base;
}
headerbar,
headerbar.titlebar,
.titlebar {
   background-color: @bg_base;
   background-image: none;
   color: @fg_text;
   border: none;
   box-shadow: inset 0 -1px 0 alpha(@fg_text, 0.07);
}
.app-title {
   color: @fg_text;
   font-size: 13px;
   font-weight: 600;
}
windowcontrols button:not(:hover),
windowcontrols button:not(:hover) image {
   color: @fg_subtext;
}
button {
   background-image: none;
}
tooltip {
   background-color: @bg_crust;
   border: 1px solid alpha(@fg_text, 0.10);
   border-radius: 8px;
   color: @fg_text;
}

/* Keyboard focus stays visible on every real control; the map nodes below
 * are canvas items and opt out explicitly. */
.btn-primary:focus-visible,
.back-btn:focus-visible,
.settings-btn:focus-visible,
.pill:focus-visible,
.chip:focus-visible,
.group-btn:focus-visible,
.mode-chip:focus-visible,
.theme-card:focus-visible,
.kahoot-opt:focus-visible {
   outline-style: solid;
   outline-width: 2px;
   outline-color: alpha(@accent, 0.65);
   outline-offset: 2px;
}

/* ------------------------------------------------------------------ */
/* Type                                                               */
/* ------------------------------------------------------------------ */

.heading {
   color: @fg_text;
   font-size: 30px;
   font-weight: 700;
   letter-spacing: -0.5px;
}
.roadmap-title {
   color: @fg_text;
   font-size: 26px;
   font-weight: 700;
   letter-spacing: -0.3px;
}
.roadmap-sub {
   color: @fg_subtext;
   font-size: 15px;
}
.welcome-body {
   color: @fg_subtext;
   font-size: 15px;
}
.welcome-meta {
   color: @fg_overlay;
   font-size: 12px;
}

/* Small all-caps-ish section markers. */
.settings-label,
.stats-section,
.stats-metric-label,
.notes-kicker,
.group-panel-label {
   color: @fg_subtext;
   font-size: 12px;
   font-weight: 600;
}
.notes-kicker {
   color: @accent;
   letter-spacing: 0.6px;
}

.hint,
.meaning {
   color: @fg_subtext;
   font-size: 13px;
}
.ex-prompt {
   color: @fg_text;
   font-size: 15px;
   font-weight: 400;
}
.ex-sub {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 500;
}
.trans-word {
   color: @fg_text;
   font-size: 24px;
   font-weight: 600;
}
.dlg-speaker {
   color: @accent;
   font-size: 15px;
   font-weight: 600;
}
.number-big {
   color: @fg_text;
   font-size: 24px;
   font-weight: 600;
}
.hm-word {
   color: @fg_text;
   font-family: monospace;
   font-size: 26px;
   font-weight: 600;
   letter-spacing: 2px;
}
.chain {
   color: @fg_text;
   font-size: 17px;
   font-weight: 500;
   letter-spacing: 0.5px;
}
.u3-answer {
   color: @success;
   font-size: 13px;
   font-weight: 600;
}
.feedback-ok {
   color: @success;
   font-size: 14px;
   font-weight: 600;
}
.feedback-err {
   color: @error;
   font-size: 14px;
   font-weight: 600;
}
.feedback-warn {
   color: @warning;
   font-size: 14px;
   font-weight: 600;
}

/* ------------------------------------------------------------------ */
/* Surfaces                                                           */
/* ------------------------------------------------------------------ */

.quiz-card,
.notes-card,
.stats-metric,
.stats-unit-row,
.book-card,
.lit-link {
   background-color: mix(@bg_base, @bg_surface0, 0.55);
   background-image: none;
   border: 1px solid alpha(@fg_text, 0.09);
   border-radius: 12px;
   color: @fg_text;
   box-shadow: none;
}
.quiz-card {
   padding: 16px 18px;
}
.notes-card {
   padding: 22px 26px;
}
.notes-title {
   color: @fg_text;
   font-size: 20px;
   font-weight: 700;
}
.notes-body {
   color: @fg_text;
   font-size: 15px;
}
.notes-tip {
   color: @success;
   font-size: 14px;
   font-weight: 500;
}
.group-panel,
.sent-group {
   background-color: alpha(@fg_text, 0.04);
   border: 1px solid alpha(@fg_text, 0.09);
   border-radius: 12px;
   padding: 12px;
}
.sent-group.ok {
   border-color: @success;
}
.sent-group.wrong {
   border-color: @error;
}

popover,
popover.background,
.settings-popover {
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid alpha(@fg_text, 0.12);
   border-radius: 16px;
   box-shadow: 0 12px 32px alpha(@bg_crust, 0.45);
}
popover > contents,
.settings-popover > contents {
   background-color: transparent;
   border: none;
   border-radius: 16px;
   box-shadow: none;
   padding: 0;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                            */
/* ------------------------------------------------------------------ */

.btn-primary {
   background-image: none;
   background-color: @accent;
   color: @on_accent;
   font-size: 15px;
   font-weight: 600;
   padding: 10px 22px;
   border: none;
   border-radius: 8px;
   box-shadow: none;
   transition: background-color 120ms ease;
}
.btn-primary:hover {
   background-color: shade(@accent, 1.1);
}
.btn-primary:active {
   background-color: shade(@accent, 0.92);
}
.btn-primary:disabled {
   background-color: alpha(@fg_text, 0.10);
   color: @fg_overlay;
}

/* Flat icon buttons in the header bar and above each page. */
.back-btn,
.settings-btn,
.settings-btn:hover,
.settings-btn:active,
.settings-btn:checked,
.settings-btn:focus {
   min-width: 32px;
   min-height: 32px;
   padding: 0;
   border-radius: 8px;
   background-color: transparent;
   background-image: none;
   border: none;
   box-shadow: none;
   color: @fg_subtext;
   transition: background-color 120ms ease, color 120ms ease;
}
.back-btn:hover,
.settings-btn:hover {
   background-color: alpha(@fg_text, 0.09);
   color: @fg_text;
}
.back-btn:active,
.settings-btn:active {
   background-color: alpha(@fg_text, 0.15);
   color: @fg_text;
}

/* Word / answer chips. */
.pill,
.chip,
.group-btn {
   background-image: none;
   background-color: mix(@bg_base, @bg_surface0, 0.7);
   color: @fg_text;
   border: 1px solid alpha(@fg_text, 0.12);
   border-radius: 8px;
   padding: 7px 14px;
   font-size: 14px;
   font-weight: 500;
   box-shadow: none;
   transition: background-color 120ms ease, border-color 120ms ease;
}
.pill:hover,
.chip:hover,
.group-btn:hover {
   background-image: none;
   background-color: mix(@bg_base, @bg_surface0, 1.0);
   border-color: alpha(@accent, 0.7);
}
.pill:active,
.chip:active,
.group-btn:active {
   background-image: none;
   background-color: @bg_surface1;
}
.pill:checked,
.group-btn:checked {
   background-image: none;
   background-color: @accent;
   border-color: @accent;
   color: @on_accent;
   font-weight: 600;
}
.pill.ok,
.pill.ok:checked,
.pill.ok:hover {
   background-image: none;
   background-color: @success;
   border-color: @success;
   color: @on_accent;
}
.pill.wrong,
.pill.wrong:checked,
.pill.wrong:hover {
   background-image: none;
   background-color: @error;
   border-color: @error;
   color: @on_accent;
}
.pill.hm-key {
   min-width: 32px;
   padding: 5px 6px;
   font-size: 13px;
}
.chip {
   border-radius: 999px;
}
.chip.ghost-host {
   opacity: 0;
}
.group-panel-label {
   margin-bottom: 4px;
}

/* Multiple-choice rows read as list items rather than as chips. They are
 * outlined instead of filled, so they do not have to be lighter than the card
 * in dark mode and darker in light mode. */
.quiz-pill {
   background-color: transparent;
   border-color: alpha(@fg_text, 0.13);
   border-radius: 10px;
   padding: 11px 14px;
   min-height: 40px;
}
.quiz-pill label {
   font-weight: 400;
}
.quiz-pill:checked label {
   font-weight: 600;
}
.quiz-heading {
   color: @fg_text;
   font-size: 17px;
   font-weight: 600;
}
.quiz-intro {
   color: @fg_subtext;
   font-size: 14px;
}
.quiz-q {
   color: @fg_text;
   font-size: 15px;
   font-weight: 600;
}
.quiz-options {
   margin-top: 4px;
}

/* Four-colour quiz board: the colours are the mechanic, so they stay, but
 * they are flat and the answer state is shown by the border alone. */
.kahoot-opt {
   background-image: none;
   color: @on_accent;
   font-size: 15px;
   font-weight: 600;
   padding: 14px 16px;
   border: 2px solid transparent;
   border-radius: 12px;
   box-shadow: none;
   transition: border-color 120ms ease, opacity 120ms ease;
}
.kahoot-0 {
   background-color: @accent;
}
.kahoot-1 {
   background-color: @error;
}
.kahoot-2 {
   background-color: @warning;
}
.kahoot-3 {
   background-color: @success;
}
.kahoot-opt:hover {
   border-color: alpha(@fg_text, 0.35);
}
.kahoot-opt.ok {
   border-color: @fg_text;
}
.kahoot-opt.wrong {
   opacity: 0.4;
}

/* ------------------------------------------------------------------ */
/* Text entry                                                         */
/* ------------------------------------------------------------------ */

entry {
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid alpha(@fg_text, 0.14);
   border-radius: 8px;
   padding: 7px 11px;
   font-size: 15px;
   caret-color: @accent;
   box-shadow: none;
}
entry:focus {
   border-color: @accent;
   box-shadow: 0 0 0 2px alpha(@accent, 0.22);
}
entry.answer-ok {
   border-color: @success;
   background-color: alpha(@success, 0.10);
}
entry.answer-wrong {
   border-color: @error;
   background-color: alpha(@error, 0.10);
}
combobox {
   background-color: transparent;
   color: @fg_text;
}
combobox button {
   background-image: none;
   background-color: @bg_mantle;
   color: @fg_text;
   border: 1px solid alpha(@fg_text, 0.14);
   border-radius: 8px;
   padding: 4px 10px;
   box-shadow: none;
}
combobox button:hover {
   background-image: none;
   border-color: alpha(@accent, 0.7);
}
combobox.answer-ok button {
   border-color: @success;
   background-color: alpha(@success, 0.10);
}
combobox.answer-wrong button {
   border-color: @error;
   background-color: alpha(@error, 0.10);
}

/* ------------------------------------------------------------------ */
/* Progress maps                                                      */
/* ------------------------------------------------------------------ */

.unit-node,
.ex-bubble {
   background-image: none;
   background-color: @node_bg;
   color: @fg_text;
   border: 2px solid @locked_border;
   border-radius: 999px;
   padding: 0;
   box-shadow: none;
   transition: background-color 120ms ease, border-color 120ms ease,
               box-shadow 150ms ease;
}
.ex-bubble {
   min-width: 64px;
   min-height: 64px;
}
.unit-node.done,
.ex-bubble.done {
   background-color: @success;
   border-color: @success;
   color: @on_accent;
}
.unit-node.current {
   background-color: @accent;
   border-color: @accent;
   color: @on_accent;
   box-shadow: 0 0 0 4px alpha(@accent, 0.2);
}
.unit-node.locked {
   background-color: @locked_bg;
   border-color: @locked_border;
   color: @fg_overlay;
}
.unit-node.finish {
   background-color: transparent;
   border: none;
   color: @fg_overlay;
}
.unit-node:hover,
.ex-bubble:hover {
   border-color: @accent;
}
.unit-node.locked:hover {
   border-color: @locked_border;
}
.unit-node.done:hover,
.ex-bubble.done:hover {
   border-color: shade(@success, 1.15);
}
.unit-node.current:hover {
   box-shadow: 0 0 0 5px alpha(@accent, 0.3);
}
.unit-node:focus,
.unit-node:focus-visible,
.ex-bubble:focus,
.ex-bubble:focus-visible {
   outline-style: none;
}
.ex-branch {
   border-style: dashed;
   border-color: @accent;
}
.ex-branch:hover {
   border-style: solid;
}

.unit-number {
   font-size: 22px;
   font-weight: 700;
}
.bubble-number {
   font-size: 20px;
   font-weight: 700;
}
.unit-node.done .unit-number,
.unit-node.current .unit-number,
.ex-bubble.done .bubble-number,
.state-icon,
.bubble-icon {
   color: @on_accent;
}
.unit-node.locked .unit-number {
   color: @fg_overlay;
}
.unit-node.locked .lock-icon {
   color: @fg_overlay;
}

/* Node captions sit on top of the rail, so they carry the page background. */
.unit-name,
.ex-label {
   color: @fg_text;
   font-size: 13px;
   font-weight: 500;
}
.unit-name-locked {
   color: @fg_overlay;
}
.cz-label {
   background-color: @bg_base;
   border-radius: 6px;
   padding: 2px 6px;
}

/* ------------------------------------------------------------------ */
/* Reading list and literature                                        */
/* ------------------------------------------------------------------ */

.book-card,
.lit-link {
   padding: 16px 20px;
   transition: background-color 120ms ease, border-color 120ms ease;
}
.book-card:hover,
.lit-link:hover {
   background-color: mix(@bg_base, @bg_surface0, 0.9);
   border-color: alpha(@accent, 0.6);
}
.book-card:active,
.lit-link:active {
   background-color: alpha(@accent, 0.14);
}
.reading-hero {
   opacity: 0.18;
}
.book-title {
   color: @fg_text;
   font-size: 20px;
   font-weight: 700;
}
.book-author {
   color: @fg_subtext;
   font-size: 15px;
   font-weight: 500;
}
.book-sub,
.lit-link-sub {
   color: @fg_subtext;
   font-size: 13px;
}
.lit-link-title {
   color: @fg_text;
   font-size: 17px;
   font-weight: 600;
}
.lit-progress {
   color: @accent;
   font-size: 13px;
   font-weight: 600;
}
.lit-score {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 500;
}
.lit-prompt {
   color: @fg_text;
   font-size: 17px;
   font-weight: 600;
}
.lit-expl {
   color: @fg_text;
   font-size: 14px;
   background-color: alpha(@success, 0.10);
   border-left: 3px solid @success;
   border-radius: 6px;
   padding: 10px 14px;
}

/* ------------------------------------------------------------------ */
/* Settings popover                                                   */
/* ------------------------------------------------------------------ */

.settings-box {
   background-color: transparent;
   color: @fg_text;
   min-width: 292px;
   padding: 16px;
}
.settings-title {
   color: @fg_text;
   font-size: 17px;
   font-weight: 700;
}
.settings-seg {
   background-color: alpha(@fg_text, 0.06);
   border: none;
   border-radius: 8px;
   padding: 3px;
}
.mode-chip {
   background-image: none;
   background-color: transparent;
   color: @fg_subtext;
   border: none;
   border-radius: 6px;
   padding: 7px 12px;
   font-size: 13px;
   font-weight: 500;
   min-width: 0;
   box-shadow: none;
   transition: background-color 120ms ease, color 120ms ease;
}
.mode-chip:hover {
   background-color: alpha(@fg_text, 0.07);
   color: @fg_text;
}
.mode-chip:checked,
.mode-chip:checked:hover {
   background-image: none;
   background-color: @accent;
   color: @on_accent;
   font-weight: 600;
}
.theme-grid,
flowboxchild {
   background-color: transparent;
   border: none;
   box-shadow: none;
   padding: 0;
   margin: 0;
}
.theme-card {
   background-image: none;
   background-color: transparent;
   color: @fg_text;
   border: none;
   border-radius: 8px;
   padding: 6px 4px;
   min-width: 0;
   box-shadow: none;
   transition: background-color 120ms ease;
}
.theme-card:hover,
.theme-card:checked:hover {
   background-color: alpha(@fg_text, 0.07);
}
.theme-card:checked {
   background-color: alpha(@fg_text, 0.04);
}
.theme-card-name {
   color: @fg_subtext;
   font-size: 12px;
   font-weight: 500;
}
.theme-card:checked .theme-card-name {
   color: @fg_text;
   font-weight: 600;
}

/* ------------------------------------------------------------------ */
/* Updates                                                            */
/* ------------------------------------------------------------------ */

.update-banner {
   background-color: alpha(@accent, 0.12);
   border-bottom: 1px solid alpha(@accent, 0.3);
   padding: 8px 16px;
}
.update-banner-text {
   color: @fg_text;
   font-size: 13px;
   font-weight: 500;
}
.update-banner-btn {
   background-image: none;
   background-color: @accent;
   color: @on_accent;
   border: none;
   border-radius: 8px;
   padding: 5px 14px;
   font-size: 13px;
   font-weight: 600;
   box-shadow: none;
   transition: background-color 120ms ease;
}
.update-banner-btn:hover {
   background-color: shade(@accent, 1.1);
}
.update-banner-later {
   background-image: none;
   background-color: transparent;
   color: @fg_subtext;
   border: none;
   border-radius: 8px;
   padding: 5px 10px;
   font-size: 13px;
   font-weight: 500;
   box-shadow: none;
}
.update-banner-later:hover {
   background-color: alpha(@fg_text, 0.09);
   color: @fg_text;
}
.update-status {
   color: @fg_subtext;
   font-size: 12px;
}
.update-btn {
   background-image: none;
   background-color: mix(@bg_base, @bg_surface0, 0.7);
   color: @fg_text;
   border: 1px solid alpha(@fg_text, 0.12);
   border-radius: 8px;
   padding: 5px 12px;
   font-size: 12px;
   font-weight: 600;
   box-shadow: none;
   transition: background-color 120ms ease, border-color 120ms ease;
}
.update-btn:hover {
   background-image: none;
   background-color: mix(@bg_base, @bg_surface0, 1.0);
   border-color: alpha(@accent, 0.7);
}
.update-btn:disabled {
   color: @fg_overlay;
}
.update-progress,
.update-progress trough {
   min-height: 6px;
   min-width: 6px;
   border: none;
   border-radius: 3px;
   padding: 0;
   background-color: alpha(@fg_text, 0.11);
}
.update-progress progress {
   min-height: 6px;
   min-width: 6px;
   border: none;
   border-radius: 3px;
   background-image: none;
   background-color: @accent;
}

/* ------------------------------------------------------------------ */
/* Statistics                                                         */
/* ------------------------------------------------------------------ */

.stats-page {
   padding: 8px 28px 24px 28px;
}
.stats-summary {
   margin-top: 10px;
   margin-bottom: 16px;
}
.stats-metric {
   padding: 14px 16px;
   min-width: 120px;
}
.stats-metric-value {
   color: @fg_text;
   font-size: 24px;
   font-weight: 700;
   letter-spacing: -0.5px;
}
.stats-metric-label {
   margin-top: 2px;
}
.stats-section {
   margin-bottom: 8px;
}
.stats-subject {
   margin-bottom: 20px;
}
.stats-subject-name {
   color: @fg_text;
   font-size: 15px;
   font-weight: 600;
}
.stats-subject-count {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 500;
}
.stats-subject-count.locked {
   color: @fg_overlay;
}
.stats-units {
   margin-top: 8px;
   padding-left: 14px;
}
.stats-unit-row {
   padding: 13px 14px;
   margin-bottom: 6px;
}
.stats-unit-row.locked {
   opacity: 0.5;
}
.stats-unit-row.done {
   border-color: alpha(@success, 0.5);
}
.stats-unit-index {
   color: @fg_overlay;
   font-size: 13px;
   font-weight: 500;
   min-width: 20px;
}
.stats-unit-name {
   color: @fg_text;
   font-size: 15px;
   font-weight: 500;
}
.stats-unit-count {
   color: @fg_subtext;
   font-size: 13px;
   font-weight: 500;
}
.stats-unit-badge {
   color: @success;
   font-size: 12px;
   font-weight: 600;
}

/* One shared bar geometry; only the fill colour differs. */
.stats-overall-bar,
.stats-overall-bar trough,
.stats-subject-bar,
.stats-subject-bar trough,
.stats-unit-bar,
.stats-unit-bar trough {
   min-height: 6px;
   min-width: 6px;
   border: none;
   border-radius: 3px;
   padding: 0;
   background-color: alpha(@fg_text, 0.11);
}
.stats-overall-bar progress,
.stats-subject-bar progress,
.stats-unit-bar progress {
   min-height: 6px;
   min-width: 6px;
   border: none;
   border-radius: 3px;
   background-image: none;
   background-color: @accent;
}
.stats-unit-bar.done progress {
   background-color: @success;
}
/* stats_set_fraction() marks bars at zero, whose fill GTK would otherwise
 * still paint at its minimum width. */
.stats-overall-bar.empty progress,
.stats-subject-bar.empty progress,
.stats-unit-bar.empty progress {
   background-color: transparent;
}
.stats-overall-bar {
   margin-bottom: 20px;
}
.stats-subject-bar {
   margin-top: 6px;
}

/* no-scale */
/* Rules below keep a fixed size (symbols/icons) even when the window grows. */
.bubble-number.branch-star {
   font-size: 20px;
}