/* ===================================================================
   GrammarType — Interactive Grammar Typing Tutor Stylesheet
   Themes: Serika Dark (Default), Carbon, Nord, Taro, Botanical, Matrix, Paper Light
   =================================================================== */

:root {
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Roboto Mono", Menlo, Monaco, Consolas, monospace;

  /* Default Theme: Serika Dark */
  --bg-primary: #323437;
  --bg-secondary: #2c2e31;
  --bg-card: #25272a;
  --bg-hover: #3c3f43;
  --border-subtle: #3a3c40;

  --accent: #e2b714;
  --accent-hover: #f0c522;
  --accent-light: rgba(226, 183, 20, 0.12);

  --text-main: #d1d0c5;
  --text-untyped: #646669;
  --text-muted: #9a9c9f;
  --text-dim: #74777b;

  --color-correct: #d1d0c5;
  --color-incorrect: #ca4754;
  --color-extra: #7e2a33;

  --warning-bg: rgba(226, 183, 20, 0.08);
  --warning-border: rgba(226, 183, 20, 0.25);
  --warning-text: #e2b714;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --caret-color: #e2b714;
}

/* ===================================================================
   Universal Modern Seamless Scrollbars (All Browsers, All Elements)
   =================================================================== */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-subtle) transparent;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 999px;
  border: 1px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
  border-radius: 999px;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

/* Hide scrollbar arrows/buttons in legacy engines */
::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}


/* Carbon Theme */
[data-theme="carbon"] {
  --bg-primary: #313131;
  --bg-secondary: #2b2b2b;
  --bg-card: #242424;
  --bg-hover: #3a3a3a;
  --border-subtle: #3d3d3d;
  --accent: #f66e0d;
  --accent-hover: #ff7f24;
  --accent-light: rgba(246, 110, 13, 0.15);
  --text-main: #f5e6c8;
  --text-untyped: #616161;
  --text-muted: #aaaaaa;
  --text-dim: #767676;
  --color-correct: #f5e6c8;
  --color-incorrect: #e45c5c;
  --caret-color: #f66e0d;
}

/* Nord Theme */
[data-theme="nord"] {
  --bg-primary: #242933;
  --bg-secondary: #1e222b;
  --bg-card: #191c24;
  --bg-hover: #2e3440;
  --border-subtle: #313744;
  --accent: #88c0d0;
  --accent-hover: #81a1c1;
  --accent-light: rgba(136, 192, 208, 0.15);
  --text-main: #eceff4;
  --text-untyped: #4c566a;
  --text-muted: #a0aabd;
  --text-dim: #7b8494;
  --color-correct: #eceff4;
  --color-incorrect: #bf616a;
  --caret-color: #88c0d0;
}

/* Taro Theme */
[data-theme="taro"] {
  --bg-primary: #131519;
  --bg-secondary: #1b1d24;
  --bg-card: #21242d;
  --bg-hover: #2a2e39;
  --border-subtle: #292d37;
  --accent: #b388ff;
  --accent-hover: #c49eff;
  --accent-light: rgba(179, 136, 255, 0.15);
  --text-main: #e6e6e6;
  --text-untyped: #626673;
  --text-muted: #a8adba;
  --text-dim: #7d8390;
  --color-correct: #e6e6e6;
  --color-incorrect: #ff5370;
  --caret-color: #b388ff;
}

/* Botanical Theme */
[data-theme="botanical"] {
  --bg-primary: #1e2621;
  --bg-secondary: #171d19;
  --bg-card: #131915;
  --bg-hover: #26312a;
  --border-subtle: #2b3830;
  --accent: #8bb39c;
  --accent-hover: #9fc1ad;
  --accent-light: rgba(139, 179, 156, 0.15);
  --text-main: #eaf0ec;
  --text-untyped: #49574d;
  --text-muted: #9aaa9d;
  --text-dim: #78867b;
  --color-correct: #eaf0ec;
  --color-incorrect: #d47d7d;
  --caret-color: #8bb39c;
}

/* Matrix Theme */
[data-theme="matrix"] {
  --bg-primary: #0d110d;
  --bg-secondary: #141a14;
  --bg-card: #192119;
  --bg-hover: #202b20;
  --border-subtle: #1f2b1f;
  --accent: #00ff41;
  --accent-hover: #20ff57;
  --accent-light: rgba(0, 255, 65, 0.15);
  --text-main: #d5fcdb;
  --text-untyped: #2e5735;
  --text-muted: #548b5e;
  --text-dim: #709076;
  --color-correct: #d5fcdb;
  --color-incorrect: #ff3333;
  --caret-color: #00ff41;
}

/* Paper Light */
[data-theme="paper-light"] {
  --bg-primary: #f5f5f0;
  --bg-secondary: #eae8df;
  --bg-card: #dfdccf;
  --bg-hover: #d5d1c0;
  --border-subtle: #ccc7b3;
  --accent: #2e5aac;
  --accent-hover: #24498c;
  --accent-light: rgba(46, 90, 172, 0.12);
  --text-main: #222222;
  --text-untyped: #8e8e88;
  --text-muted: #5e5e58;
  --text-dim: #70706a; /* High-contrast legible labels */
  --color-correct: #222222;
  --color-incorrect: #c53030;
  --caret-color: #2e5aac;
}

/* Full Black (OLED Pitch Black) */
[data-theme="full-black"], [data-theme="oled-black"] {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: #141414;
  --bg-hover: #1f1f1f;
  --border-subtle: #242424;
  --accent: #e2b714;
  --accent-hover: #ffd026;
  --accent-light: rgba(226, 183, 20, 0.15);
  --text-main: #f5f5f5;
  --text-untyped: #555555;
  --text-muted: #888888;
  --text-dim: #858585;
  --color-correct: #f5f5f5;
  --color-incorrect: #ff4757;
  --color-extra: #8b0000;
  --caret-color: #e2b714;
}

/* Monochrome Black (Pure Black & Crisp White) */
[data-theme="monochrome-black"] {
  --bg-primary: #000000;
  --bg-secondary: #0b0b0b;
  --bg-card: #141414;
  --bg-hover: #202020;
  --border-subtle: #262626;
  --accent: #ffffff;
  --accent-hover: #e0e0e0;
  --accent-light: rgba(255, 255, 255, 0.15);
  --text-main: #ffffff;
  --text-untyped: #484848;
  --text-muted: #888888;
  --text-dim: #828282;
  --color-correct: #ffffff;
  --color-incorrect: #ff3344;
  --color-extra: #771122;
  --caret-color: #ffffff;
}

/* Dracula */
[data-theme="dracula"] {
  --bg-primary: #282a36;
  --bg-secondary: #21222c;
  --bg-card: #191a21;
  --bg-hover: #343746;
  --border-subtle: #44475a;
  --accent: #bd93f9;
  --accent-hover: #caa9fa;
  --accent-light: rgba(189, 147, 249, 0.15);
  --text-main: #f8f8f2;
  --text-untyped: #6272a4;
  --text-muted: #9499ab;
  --text-dim: #888a96;
  --color-correct: #f8f8f2;
  --color-incorrect: #ff5555;
  --caret-color: #bd93f9;
}

/* Reset & Layout */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease;
  overflow-x: hidden;
}

/* Header Layout - Single Row Aligned */
.app-header {
  padding: 0.85rem 2rem 0.25rem;
  max-width: 1250px;
  width: 100%;
  margin: 0 auto;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: nowrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
}

.brand-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.brand-title {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-muted);
}

.brand-title .accent-text {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.32rem;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.header-actions > .icon-btn,
.header-actions .sound-control-cluster > .icon-btn {
  min-height: 30px;
  padding: 0.2rem 0.42rem;
  gap: 0.28rem;
  font-size: 0.74rem;
  line-height: 1;
  border-radius: 6px;
}

.header-actions .icon-btn > span:first-child,
.brand-icon,
.theme-pill-selector > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  font-size: 0.88rem;
}

.brand-icon { font-size: 1.15rem; }
.brand-title { font-size: 1.22rem; }

.header-actions .streak-badge-btn {
  min-height: 28px;
  padding: 0.18rem 0.48rem;
  font-size: 0.7rem;
  line-height: 1;
  white-space: nowrap;
}

.sound-control-cluster { gap: 0.12rem !important; }
#sound-volume-slider { width: 38px !important; }

.theme-pill-selector .theme-mark {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  flex: 0 0 auto;
}

.theme-pill-selector .select-skin,
.theme-pill-selector .select-skin-trigger {
  width: 132px !important;
  min-width: 132px !important;
  max-width: 132px !important;
}
.theme-pill-selector .select-skin-trigger {
  overflow: hidden;
  text-overflow: ellipsis;
}
.theme-pill-selector .select-skin-trigger::after {
  width: 0.36rem;
  height: 0.36rem;
  margin-left: 0.25rem;
}
.theme-pill-selector .select-skin-menu {
  width: 156px !important;
  max-width: calc(100vw - 24px);
  font-size: 0.7rem;
}

.theme-pill-selector .select-skin-option {
  font-size: 0.68rem;
  padding: 0.32rem 0.48rem;
  line-height: 1.25;
}

.select-skin.open .select-skin-trigger { border-color: var(--accent); }
.config-bar .select-skin.open { z-index: 85; }
.theme-pill-selector .select-skin-option {
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Minimalist Buttons & Selects */
.icon-btn, .pill-btn, .select-pill {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease, transform 0.1s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  outline: none;
}

.icon-btn:active, .pill-btn:active {
  transform: translateY(1px) scale(0.98);
}

.icon-btn:focus-visible, .pill-btn:focus-visible, .select-pill:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.icon-btn:hover, .pill-btn:hover, .select-pill:hover {
  color: var(--text-main);
}

.pill-btn.active, .select-pill.active {
  color: var(--accent);
}

.select-pill {
  background: var(--bg-secondary);
  color: var(--text-muted);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
}

.select-pill:focus {
  color: var(--text-main);
}
/* Universal Form & Select Dropdown Styling - Seamless Theme Integration */
select {
  color-scheme: dark;
  scrollbar-color: var(--border-subtle) transparent;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-color: var(--bg-secondary) !important;
  color: var(--text-main) !important;
  font-family: var(--font-sans);
  border: 1px solid var(--border-subtle);
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") !important;
  background-repeat: no-repeat !important;
  background-position: calc(100% - 0.45rem) center !important;
  background-size: 10px 10px !important;
  padding-right: 1.35rem !important;
}

[data-theme="paper-light"] select {
  color-scheme: light;
  background-color: var(--bg-card) !important;
  color: var(--text-main) !important;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23444444' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") !important;
  background-repeat: no-repeat !important;
  background-position: calc(100% - 0.45rem) center !important;
  background-size: 10px 10px !important;
}

[data-theme="full-black"] select {
  background-color: #121212 !important;
  color: #ffffff !important;
}

select option,
select optgroup {
  background-color: var(--bg-secondary) !important;
  color: var(--text-main) !important;
  font-family: var(--font-sans);
}

[data-theme="paper-light"] select option {
  background-color: #f0eee6 !important;
  color: #222222 !important;
}

[data-theme="full-black"] select option {
  background-color: #121212 !important;
  color: #ffffff !important;
}

.select-skin {
  position: relative;
  display: inline-flex;
  min-width: 0;
  vertical-align: middle;
}

.select-skin-trigger { width: 100%; }

.select-skin-source {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  opacity: 0 !important;
  pointer-events: none !important;
  clip-path: inset(50%) !important;
  overflow: hidden !important;
}

.select-skin-trigger {
  min-width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.55rem;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-main);
  font: inherit;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
}

.select-skin-trigger::after {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.7;
  flex: 0 0 auto;
}

.select-skin-trigger:hover,
.select-skin-trigger[aria-expanded="true"] {
  border-color: var(--accent);
}

.select-skin-trigger:focus-visible,
.select-skin-option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.select-skin-menu {
  position: fixed;
  z-index: 120;
  top: var(--select-menu-top, 0px);
  left: var(--select-menu-left, 0px);
  width: var(--select-menu-width, 10rem);
  max-width: calc(100vw - 24px);
  max-height: var(--select-menu-max-height, min(18rem, 55vh));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.25rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  box-sizing: border-box;
}

.select-skin-menu-config { max-height: min(208px, 42vh) !important; }
.select-skin-menu-config .select-skin-option { min-height: 28px; font-size: 0.68rem; line-height: 1.25; }
.select-skin-menu-theme { max-height: min(240px, 48vh) !important; }
body.modal-open .select-skin-menu { display: none !important; }

.select-skin-menu-config {
  width: min(228px, calc(100vw - 24px));
  font-size: 0.7rem;
}


.select-skin-menu-theme {
  width: min(156px, calc(100vw - 24px));
  font-size: 0.68rem;
}

.select-skin-menu[hidden] { display: none !important; }
.select-skin-option-config { font-size: 0.68rem; padding: 0.32rem 0.46rem; line-height: 1.3; }
.select-skin-option-theme { font-size: 0.7rem; padding: 0.34rem 0.48rem; line-height: 1.3; }

.select-skin-option {
  display: block;
  width: 100%;
  padding: 0.42rem 0.6rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-main);
  font: inherit;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
}

.select-skin-option:hover,
.select-skin-option[aria-selected="true"] {
  background: var(--bg-hover);
  color: var(--accent);
}

.select-skin-option { transition: background-color 0.12s ease, color 0.12s ease; }

[data-theme="paper-light"] .select-skin-menu { background: #f7f5ed; }
[data-theme="paper-light"] .select-skin-option { color: #323437; }
[data-theme="paper-light"] .select-skin-option:hover,
[data-theme="paper-light"] .select-skin-option[aria-selected="true"] { background: #e9e5d8; color: #2459a6; }
[data-theme="full-black"] .select-skin-menu { background: #121212; }

body.modal-open .select-skin-menu { display: none !important; }

select option {
  padding: 0.55rem 0.85rem !important;
  font-size: 0.82rem;
  background-color: var(--bg-secondary) !important;
  color: var(--text-main) !important;
}

select option:checked {
  background-color: var(--bg-hover) !important;
  color: var(--accent) !important;
  font-weight: 700;
}

select option:hover {
  background-color: var(--bg-hover) !important;
  color: var(--accent) !important;
}


/* Main Container */
.main-content {
  flex: 1;
  max-width: 1250px;
  width: 100%;
  margin: 0 auto;
  padding: 0.2rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center; /* Ensures all direct children center horizontally */
  justify-content: flex-start;
  gap: 0.65rem; /* Reduced from 1.2rem to tighten overall vertical spacing */
}

/* Grammar Practice Config Bar - Balanced Two Compact Rows */
.config-bar {
  position: relative;
  z-index: 40;
  box-sizing: border-box !important;
  background: color-mix(in srgb, var(--bg-secondary) 92%, transparent) !important;
  border: 1px solid var(--border-subtle) !important;
  transition: height 0.28s cubic-bezier(0.2, 0.9, 0.3, 1), padding 0.22s cubic-bezier(0.2, 0.9, 0.3, 1), gap 0.22s ease, border-color 0.2s ease, box-shadow 0.22s ease, opacity 0.22s ease, transform 0.22s cubic-bezier(0.2, 0.9, 0.3, 1), background-color 0.2s ease;
  border-radius: var(--radius-lg) !important;
  padding: 0.5rem 1.1rem !important;
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  justify-content: center !important;
  align-self: center !important;
  flex: 0 0 auto !important;
  gap: 0.4rem !important;
  width: max-content !important;
  max-width: min(calc(100vw - 3rem), 1120px) !important;
  interpolate-size: allow-keywords;
  height: auto;
  min-height: 0 !important;
  margin: 0 auto 0.25rem auto !important;
  font-size: 0.74rem !important;
  opacity: 0.98;
  overflow: visible !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transform-origin: top center;
}

body.typing-active .config-bar {
  opacity: 0.16;
  filter: saturate(0.35);
  transform: translateY(-6px) scale(0.96);
  padding-top: 0.12rem !important;
  padding-bottom: 0.12rem !important;
}

body.typing-active .config-bar:hover,
body.typing-active .config-bar:focus-within,
body.typing-active .config-bar:has(.config-select-group.open) {
  opacity: 0.92;
  filter: none;
  transform: none;
  padding-top: 0.5rem !important;
  padding-bottom: 0.5rem !important;
}

.config-bar:has(.config-select-group.open) { z-index: 90; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.config-row {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.6rem !important;
  flex-wrap: wrap !important;
  white-space: nowrap !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
  padding: 0 0.15rem !important;
}

.config-row > *,
.config-group,
.config-group > * { min-width: 0; }

.config-group { flex-shrink: 1 !important; }
.config-select-group { position: relative; min-width: 0 !important; flex: 0 1 auto !important; }
.config-select-group .select-skin { width: auto !important; max-width: none !important; }
.config-select-group .select-skin-trigger {
  box-sizing: border-box !important;
  width: 100% !important;
  min-width: 0 !important;
  max-width: 100% !important;
  overflow: hidden !important;
  text-overflow: ellipsis;
  transition: width 0.18s ease, border-color 0.14s ease;
}
.config-select-group .select-skin.open .select-skin-trigger { border-color: var(--accent); }
.config-group > span:first-child { flex-shrink: 0; }


.config-bar:hover {
  opacity: 1;
  border-color: rgba(226, 183, 20, 0.45) !important;
}

.config-group {
  display: inline-flex !important;
  align-items: center !important;
  gap: 0.3rem !important;
  flex: 0 1 auto !important;
  min-width: 0 !important;
  transition: gap 0.16s ease;
}

/* Progressive disclosure: show active setting; reveal alternatives on hover, keyboard focus or tap. */
#level-pills .config-item:not(.active),
#time-pills .config-item:not(.active),
#count-pills .config-item:not(.active),
#size-pills .config-item:not(.active) {
  display: none !important;
}

#level-pills:hover .config-item:not(.active),
#level-pills:focus-within .config-item:not(.active),
#level-pills.expanded .config-item:not(.active),
#time-pills:hover .config-item:not(.active),
#time-pills:focus-within .config-item:not(.active),
#time-pills.expanded .config-item:not(.active),
#count-pills:hover .config-item:not(.active),
#count-pills:focus-within .config-item:not(.active),
#count-pills.expanded .config-item:not(.active),
#size-pills:hover .config-item:not(.active),
#size-pills:focus-within .config-item:not(.active),
#size-pills.expanded .config-item:not(.active) {
  display: inline-flex !important;
  padding-left: 0.32rem !important;
  padding-right: 0.32rem !important;
}

#level-pills .config-item:not(.active),
#time-pills .config-item:not(.active),
#count-pills .config-item:not(.active),
#size-pills .config-item:not(.active) {
  animation: pillReveal 0.2s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}

@keyframes pillReveal {
  from { opacity: 0; transform: translateY(-3px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.config-group > span:first-child {
  display: inline-block !important;
  color: var(--text-muted) !important;
  font-size: 0.65rem !important;
  text-transform: uppercase !important;
  letter-spacing: 0.05em !important;
  opacity: 1 !important;
}

.config-bar .select-pill,
.config-bar .select-skin-trigger {
  font-size: 0.68rem !important;
  padding: 0.12rem 0.38rem !important;
  height: 24px !important;
  line-height: 1 !important;
  border-radius: var(--radius-sm) !important;
  border: 1px solid var(--border-subtle) !important;
  background-color: var(--bg-card) !important;
  color: var(--text-main) !important;
  cursor: pointer !important;
  width: auto !important;
  max-width: none !important;
  overflow: visible !important;
  white-space: nowrap !important;
}

.config-bar .select-skin { flex: 0 0 auto; }
.config-bar .select-skin-trigger::after { width: 0.34rem; height: 0.34rem; }
.config-bar .select-skin-lang-select { width: 112px !important; }


.config-bar .select-pill:focus,
.config-bar .select-pill:hover,
.config-bar .select-skin-trigger:hover {
  color: var(--text-main) !important;
  border-color: var(--accent) !important;
  background: var(--bg-hover) !important;
}

.config-divider {
  width: 1px !important;
  height: 14px !important;
  background: var(--border-subtle) !important;
  margin: 0 0.2rem !important;
  flex-shrink: 0 !important;
}

.config-item {
  color: var(--text-muted) !important;
  cursor: pointer !important;
  padding: 0.12rem 0.4rem !important;
  border-radius: var(--radius-sm) !important;
  font-size: 0.74rem !important;
  font-family: var(--font-mono) !important;
  transition: all 0.15s ease !important;
  user-select: none !important;
  white-space: nowrap !important;
}

.config-item:hover {
  color: var(--text-main) !important;
}

.config-item.active {
  color: var(--accent) !important;
  font-weight: 700 !important;
  background: rgba(226, 183, 20, 0.1) !important;
}

#lesson-counter {
  font-size: 0.76rem !important;
  font-variant-numeric: tabular-nums !important;
  color: var(--text-muted) !important;
  font-family: var(--font-mono) !important;
  margin: 0 0.2rem !important;
  white-space: nowrap !important;
}

/* Minimalist Grammar Cue Pill Header - Sleek & Compact */
.grammar-cue-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
  max-width: 900px;
  width: 100%;
  margin: 0.2rem auto 0.7rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(226, 183, 20, 0.25);
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
  transition: transform 0.24s cubic-bezier(0.2, 0.9, 0.3, 1), border-color 0.24s ease, box-shadow 0.24s ease;
  animation: fadeInCue 0.25s ease-out;
}

@keyframes fadeInCue {
  from {
    opacity: 0.6;
    transform: translateY(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.grammar-cue-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.badge-tag {
  font-size: 0.88rem;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--accent-light);
  padding: 0.22rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(226, 183, 20, 0.35);
}

.badge-level {
  font-size: 0.76rem;
  color: var(--text-main);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--bg-card);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
}

.lesson-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.grammar-rule-text {
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--text-main);
  line-height: 1.6;
  max-width: 820px;
}

.grammar-bengali-text {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 500;
  line-height: 1.5;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
  display: none;
}

.grammar-pro-tip {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--warning-bg);
  border-left: 3px solid var(--accent);
  padding: 0.42rem 0.75rem;
  border-radius: var(--radius-sm);
  text-align: left;
  width: 100%;
  line-height: 1.45;
}

.mistake-alert {
  padding: 0.3rem 0.65rem;
  font-size: 0.76rem;
  line-height: 1.4;
}

.mistake-alert {
  background: rgba(197, 48, 48, 0.12);
  border-left: 3px solid var(--color-incorrect);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-main);
  width: 100%;
  text-align: left;
}

.error-strike {
  text-decoration: line-through;
  color: var(--color-incorrect);
  font-weight: 600;
}

/* Parts of Speech Tags */
.pos-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-top: 0.4rem;
}

.pos-pill {
  font-size: 0.72rem;
  background: var(--bg-secondary);
  color: var(--text-muted);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
}

.pos-pill strong {
  color: var(--text-main);
}

/* Live Minimalist Counter */
.live-stats-bar {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  margin-bottom: 0.25rem; /* Distinct space above words so overlay never touches it */
  padding-left: 0.25rem;
  user-select: none;
  position: relative;
  z-index: 25; /* Always above any typing overlay */
}

.live-stat-item {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}

.live-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ===================================================================
   TYPING ARENA & ROCK-SOLID CARET
   =================================================================== */

.typing-arena {
  position: relative;
  width: 100%;
  min-height: 140px;
  cursor: default;
  outline: none;
  border: none;
  overflow: visible; /* Prevent glow clipping on outer wrapper */
}

/* Words Stream Container */
.words-container {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65em;
  font-family: var(--font-mono);
  font-size: 1.65rem;
  line-height: 2.2;
  user-select: none;
  max-height: 200px;
  overflow-y: hidden;
  scroll-behavior: smooth;
  padding: 0.5rem 1.2rem; /* Generous 1.2rem horizontal padding so caret glow radiates with zero clipping */
  margin: 0 -1.2rem; /* Negative margin offsets padding to preserve visual alignment */
}

/* Words are inline-flex without position:relative to preserve absolute global coordinates */
.word {
  display: inline-flex;
}

.char {
  color: var(--text-untyped);
  transition: color 0.05s ease;
}

.char.correct {
  color: var(--text-main);
}

.char.incorrect {
  color: var(--color-incorrect);
  border-bottom: 2px solid var(--color-incorrect);
}

.char.extra {
  color: var(--color-extra);
  opacity: 0.8;
}

#speak-sentence-btn.speaking-active {
  color: var(--accent) !important;
  background: rgba(226, 183, 20, 0.18) !important;
  border-color: var(--accent) !important;
  animation: speakPulse 0.9s infinite alternate;
}

@keyframes speakPulse {
  0% { transform: scale(0.98); opacity: 0.85; }
  100% { transform: scale(1.03); opacity: 1; }
}
.caret {
  position: absolute;
  top: 0;
  left: 0;
  width: 2.5px;
  background-color: var(--caret-color);
  border-radius: 2px;
  pointer-events: none;
  transition: transform 0.08s cubic-bezier(0.2, 0.9, 0.3, 1), height 0.06s ease;
  animation: caretFlash 1.1s infinite;
  box-shadow: 0 0 5px var(--caret-color), 0 0 10px rgba(226, 183, 20, 0.45);
  z-index: 10;
  display: none;
}

/* Key Heatmap Status Classes */
.key.heat-perfect {
  background: rgba(72, 187, 120, 0.25) !important;
  color: #48bb78 !important;
  border: 1px solid rgba(72, 187, 120, 0.5);
}

.key.heat-warm {
  background: rgba(237, 137, 54, 0.25) !important;
  color: #ed8936 !important;
  border: 1px solid rgba(237, 137, 54, 0.5);
}

.key.heat-trouble {
  background: rgba(229, 62, 62, 0.28) !important;
  color: #fc8181 !important;
  border: 1px solid rgba(229, 62, 62, 0.6);
  animation: errorPulse 1.2s infinite alternate;
}

@keyframes errorPulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.04); }
}

/* Interactive Quiz Modal Styling */
.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 1.2rem 0;
}

.quiz-option-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-main);
  text-align: left;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.quiz-option-btn:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
}

.quiz-option-btn.selected-correct {
  background: rgba(72, 187, 120, 0.18) !important;
  border-color: #48bb78 !important;
  color: #48bb78 !important;
  font-weight: 700;
}

.quiz-option-btn.selected-incorrect {
  background: rgba(229, 62, 62, 0.18) !important;
  border-color: #e53e3e !important;
  color: #fc8181 !important;
  font-weight: 700;
}

/* Gamification Badge Pill in Header */
.streak-badge-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: #f6ad55;
  background: rgba(246, 173, 85, 0.12);
  border: 1px solid rgba(246, 173, 85, 0.35);
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.streak-badge-btn:hover {
  background: rgba(246, 173, 85, 0.22);
  transform: translateY(-1px);
}

@keyframes caretFlash {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Hidden Keystroke Capture Input */
.hidden-input {
  position: absolute;
  opacity: 0;
  top: -9999px;
  left: -9999px;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

/* Focus Notice - Seamless Ambient Vignette Blur */
.focus-notice {
  position: absolute;
  top: 0;
  left: -1rem;
  right: -1rem;
  bottom: 0;
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  /* Smooth radial and gradient feathering so edges dissolve into the page background seamlessly */
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 50%, rgba(0,0,0,0) 98%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 50%, rgba(0,0,0,0) 98%);
  opacity: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: opacity 0.25s cubic-bezier(0.2, 0.9, 0.3, 1);
  z-index: 20;
}

[data-theme="paper-light"] .focus-notice {
  background: rgba(234, 232, 223, 0.45);
}

.focus-notice span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  color: var(--text-main);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  user-select: none;
}

.focus-notice:hover span {
  border-color: var(--accent);
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

.focus-notice.active {
  opacity: 1;
  pointer-events: auto;
}

/* Bottom Minimalist Controls */
.restart-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.restart-circle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-full);
  transition: color 0.15s ease, transform 0.25s ease;
  outline: none;
}

.restart-circle-btn:hover {
  color: var(--text-main);
  transform: rotate(90deg);
}

.shortcut-hints {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.key-pill {
  background: var(--bg-secondary);
  color: var(--text-muted);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* Virtual Keyboard */
.virtual-keyboard {
  max-width: 680px;
  width: 100%;
  margin: 1rem auto 0;
  display: none;
  flex-direction: column;
  gap: 0.3rem;
  user-select: none;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 0.3rem;
}

.key {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.5rem 0;
  width: 36px;
  text-align: center;
  cursor: pointer;
  transition: all 0.12s cubic-bezier(0.2, 0.9, 0.3, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.key.key-wide { width: 54px; }
.key.key-space { width: 220px; }

.key:hover {
  background: var(--bg-hover);
  color: var(--text-main);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.key:active {
  transform: translateY(1px) scale(0.96);
}

.key.active-target {
  background: var(--accent) !important;
  color: #000000 !important;
  font-weight: 800 !important;
  box-shadow: 0 0 12px var(--accent), 0 0 4px var(--accent) !important;
  border-color: var(--accent) !important;
  transform: scale(1.05);
}

/* Volume Slider Custom Styling */
input[type="range"]#sound-volume-slider {
  -webkit-appearance: none;
  background: var(--border-subtle);
  border-radius: 999px;
  height: 4px;
  outline: none;
  transition: opacity 0.2s;
}

input[type="range"]#sound-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.1s ease;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.3);
}

input[type="range"]#sound-volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* Modals */
body.modal-open {
  overflow: hidden !important;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  overflow: hidden !important; /* Ensure no page-level scrollbar appears */
}

.modal-overlay.show {
  display: flex !important;
  z-index: 100;
}

body.modal-open .select-skin-menu { display: none !important; }

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  max-width: 550px;
  width: 100%;
  box-shadow: 0 12px 30px rgba(0,0,0,0.5);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden !important; /* Never show outer scrollbar on dialog box */
}

/* Scrollable containers inside modals */
.modal-content > .directory-list,
#stat-category-mastery {
  flex: 1;
  min-height: 0;
  overflow-y: auto !important;
}

/* Custom sleek scrollbar for modal scrollable containers */
.directory-list::-webkit-scrollbar,
#stat-category-mastery::-webkit-scrollbar {
  width: 6px;
}

.directory-list::-webkit-scrollbar-track,
#stat-category-mastery::-webkit-scrollbar-track {
  background: transparent;
}

.directory-list::-webkit-scrollbar-thumb,
#stat-category-mastery::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 999px;
}

.directory-list::-webkit-scrollbar-thumb:hover,
#stat-category-mastery::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
}

.close-btn:hover { color: var(--text-main); }

/* Results Screen */
#results-modal .modal-content {
  max-width: 620px;
  max-height: 90vh;
  padding: 1.85rem 2rem;
  overflow-y: auto !important; /* Allow scroll if chart + explanation open */
}

.results-hero {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-top: 0.25rem; /* Ensure top of large digits is never clipped */
}

.results-primary {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  overflow: visible;
}

.results-big-wpm {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.15; /* Generous line-height so ascent is never cropped */
  padding-top: 0.1rem;
  display: inline-block;
}

.results-big-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.results-sub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.sub-stat {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--text-main);
}

.sub-stat small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.takeaway-box {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
  margin-bottom: 1.25rem;
}

.takeaway-box:empty {
  display: none !important; /* Never show empty gray box or rogue accent border */
}

.takeaway-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.takeaway-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Minimalist Form Controls */
.modal-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-sans);
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  outline: none;
}

.modal-input:focus {
  border-color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  color: #000000;
  font-weight: 700;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.btn-primary:hover {
  opacity: 0.9;
}

/* Directory Modal */
.directory-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 48vh;
  overflow-y: auto;
  padding-right: 0.35rem;
}

.directory-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.directory-item:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.directory-item.active {
  border-color: var(--accent);
  border-left: 3px solid var(--accent);
  background: var(--bg-secondary);
}

.dir-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.dir-preview {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 480px;
}

/* Footer */
.app-footer {
  margin-top: auto;
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.theme-pill-selector {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  height: 32px;
  background: transparent;
  padding: 0 0.25rem;
  border-radius: var(--radius-sm);
  flex: 0 0 auto;
}

.theme-pill-selector .select-skin-trigger {
  min-width: 118px;
  width: 132px;
  height: 28px;
  padding: 0.15rem 0.48rem;
  font-size: 0.72rem;
  line-height: 1;
  border-color: transparent;
  background: var(--bg-secondary);
}

.theme-pill-selector .select-skin { width: 132px !important; }
.theme-pill-selector .select-skin-trigger:hover,
.theme-pill-selector .select-skin-trigger[aria-expanded="true"] {
  border-color: var(--border-subtle);
  background: var(--bg-hover);
}

/* Custom Notification Toast */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 9999;
  max-width: 90vw;
  white-space: pre-line;
}

.toast-container.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.toast-container.toast-success {
  border-left: 4px solid var(--accent);
}

.toast-container.toast-error {
  border-left: 4px solid var(--color-incorrect);
}

.toast-container.toast-info {
  border-left: 4px solid #3182ce;
}
/* Responsive */
@media (max-width: 768px) {
  .app-header { padding: 0.5rem 0.6rem 0.2rem; }
  .header-container { justify-content: center; gap: 0.35rem; flex-wrap: wrap; }
  .header-actions { justify-content: center; gap: 0.16rem; flex-wrap: wrap; flex-basis: 100%; }
  .header-actions > .icon-btn, .header-actions .sound-control-cluster > .icon-btn { min-height: 26px; font-size: 0.62rem; padding: 0.12rem 0.24rem; }
  .header-actions .streak-badge-btn { min-height: 25px; font-size: 0.61rem; padding: 0.12rem 0.28rem; }
  .sound-control-cluster #sound-volume-slider { width: 24px !important; }
  /* Keep only frequent actions visible; avoid wrapping the typing-focused header. */
  .header-actions > #open-custom-btn,
  .header-actions > #toggle-keyboard-btn,
  .header-actions > #open-directory-btn,
  .header-actions > .sound-control-cluster { display: none !important; }
  .header-actions .icon-btn { max-width: none; }
  .brand-title { font-size: 1.02rem; }
  .brand-icon { font-size: 1rem; }
  .theme-pill-selector { height: 26px; gap: 0.1rem; padding: 0; }
  .theme-pill-selector .select-skin, .theme-pill-selector .select-skin-trigger { width: 112px !important; min-width: 112px !important; max-width: 112px !important; height: 26px; font-size: 0.66rem; }
  .theme-pill-selector .select-skin-menu { min-width: 104px !important; max-width: 156px; }
  .config-bar .select-skin-menu { width: min(224px, calc(100vw - 24px)); max-width: calc(100vw - 24px); max-height: min(190px, 38vh) !important; }
  .config-bar .select-skin-option { font-size: 0.64rem; padding: 0.3rem 0.42rem; min-height: 28px; }
  .header-actions .theme-pill-selector .theme-mark { width: 18px; height: 18px; }
  .theme-pill-selector .select-skin,
  .theme-pill-selector .select-skin-trigger { width: 104px !important; min-width: 104px !important; max-width: 104px !important; }
  .theme-pill-selector .select-skin-trigger { font-size: 0.62rem; padding: 0.12rem 0.32rem; }
  .icon-btn, .pill-btn, .select-pill { font-size: 0.72rem; padding: 0.2rem 0.35rem; }
  .main-content { padding: 0.5rem 0.75rem 1.5rem; gap: 0.8rem; }
  .grammar-cue-container { padding: 0.6rem 0.75rem; gap: 0.38rem; margin-bottom: 0.35rem; }
  .grammar-cue-meta { gap: 0.35rem; }
  .badge-tag { font-size: 0.72rem; padding: 0.14rem 0.48rem; }
  .badge-level { font-size: 0.64rem; padding: 0.12rem 0.4rem; }
  .lesson-title { font-size: 0.9rem; }
  .grammar-rule-text { font-size: 0.78rem; line-height: 1.4; }
  .grammar-pro-tip { font-size: 0.74rem; padding: 0.32rem 0.55rem; line-height: 1.35; }
  .mistake-alert { font-size: 0.68rem; padding: 0.25rem 0.48rem; line-height: 1.3; }
  .words-container { font-size: 1.25rem; line-height: 1.8; min-height: 100px; }
  .config-bar {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    padding: 0.42rem 0.36rem !important;
    gap: 0.32rem !important;
    font-size: 0.63rem !important;
    overflow: visible !important;
  }
  .config-row {
    width: 100% !important;
    max-width: 100% !important;
    flex-wrap: wrap !important;
    white-space: normal !important;
    justify-content: flex-start !important;
    gap: 0.24rem 0.42rem !important;
    padding: 0 !important;
  }
  .config-group { gap: 0.14rem !important; max-width: 100%; }
  .config-group > span:first-child { font-size: 0.56rem !important; }
  .config-divider { display: none !important; }
  .config-bar .select-skin-trigger { font-size: 0.59rem !important; }
  .config-bar .config-row:last-child .config-group { flex-wrap: wrap; }
  .config-bar .config-row:last-child .config-group#level-pills { flex-wrap: wrap; }
  .config-bar .config-row:last-child .config-group#level-pills .config-item { font-size: 0.59rem !important; padding: 0.08rem 0.2rem !important; }
  .config-bar .config-row:last-child .config-group#time-pills,
  .config-bar .config-row:last-child .config-group#count-pills,
  .config-bar .config-row:last-child .config-group#size-pills { flex: 0 1 auto; }
  .config-bar .config-row:last-child .config-group#time-pills .config-item,
  .config-bar .config-row:last-child .config-group#count-pills .config-item,
  .config-bar .config-row:last-child .config-group#size-pills .config-item { font-size: 0.59rem !important; padding: 0.08rem 0.18rem !important; }
  #level-pills:hover .config-item:not(.active), #level-pills:focus-within .config-item:not(.active), #level-pills.expanded .config-item:not(.active),
  #time-pills:hover .config-item:not(.active), #time-pills:focus-within .config-item:not(.active), #time-pills.expanded .config-item:not(.active),
  #count-pills:hover .config-item:not(.active), #count-pills:focus-within .config-item:not(.active), #count-pills.expanded .config-item:not(.active),
  #size-pills:hover .config-item:not(.active), #size-pills:focus-within .config-item:not(.active), #size-pills.expanded .config-item:not(.active) { display: inline-flex !important; }
  #lesson-counter { font-size: 0.64rem !important; }
  .virtual-keyboard { gap: 0.2rem; }
  .key { width: 26px; font-size: 0.7rem; padding: 0.35rem 0; }
  .key.key-wide { width: 40px; }
  .key.key-space { width: 120px; }
}