:root {
  --bg: #ffffff;
  --text: #111318;
  --muted: #6b7280;
  --card: #ffffff;
  --border: rgba(0, 0, 0, .08);
  --shadow: 0 12px 40px rgba(0, 0, 0, .08);
  --accent: #6440fb;
  --accent-light: #8b74fc;
  --accent-text: #fff;
  --brand-soft: #ede9fe;
  --success: #16a34a;
  --danger: #dc2626;
  --warning-bg: #fff3cd;
  --warning-text: #856404;
  --r: 18px;
}

[data-theme="dark"] {
  --bg: #16181d;
  --text: rgba(255, 255, 255, .90);
  --muted: rgba(255, 255, 255, .55);
  --card: #1e2126;
  --border: rgba(255, 255, 255, .12);
  --shadow: 0 12px 40px rgba(0, 0, 0, .50);
  --accent: #8b74fc;
  --accent-light: #b4a7fe;
  --accent-text: #16181d;
  --brand-soft: rgba(139, 116, 252, .15);
  --success: #22c55e;
  --danger: #ef4444;
  --warning-bg: rgba(255, 193, 7, .12);
  --warning-text: #ffc107;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes resultIn {
  from {
    opacity: 0;
    transform: scale(.94);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.warning-msg {
  animation: slideDown 0.3s ease both;
}

/* ===== Header / Logo ===== */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.top-inner {
  max-width: 900px;
  margin: 0 auto;
  height: 94px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
}

.logo-img {
  width: 160px !important;
  height: auto !important;
  display: block;
  max-width: 100%;
}

[data-theme="light"] .logo-dark-img {
  display: none;
}

[data-theme="dark"] .logo-light-img {
  display: none;
}

.brand-sub {
  font-size: 15px;
  color: var(--muted);
  white-space: nowrap;
  margin-left: 5px;
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.lang-toggle {
  display: flex;
  position: relative;
  background: color-mix(in srgb, var(--card) 90%, transparent);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.lang-option {
  position: relative;
  z-index: 2;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 6px 13px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.3s ease;
  white-space: nowrap;
  font-family: inherit;
}

.lang-option.active {
  color: var(--accent-text);
}

.lang-slider {
  position: absolute;
  top: 2px;
  bottom: 2px;
  left: 2px;
  width: 35px;
  background: var(--accent);
  border-radius: 999px;
  z-index: 1;
  transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1), width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-btn {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 90%, transparent);
  color: var(--text);
  padding: 7px 11px;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, transform 0.2s;
}

.theme-btn:hover {
  transform: rotate(15deg);
}

[data-theme="light"] .icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: none;
}

/* ===== Searchbar (thicker) ===== */
.search-row {
  max-width: 900px;
  margin: 0 auto;
  padding: 4px 16px 12px;
  display: flex;
  justify-content: center;
}

.search {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 2px solid var(--border);
  box-shadow: 0 4px 18px rgba(0, 0, 0, .05);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent), 0 6px 20px rgba(0, 0, 0, .06);
}

.search-icon {
  flex-shrink: 0;
  color: var(--muted);
  opacity: 0.85;
}

.clear-btn {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.clear-btn:hover {
  color: var(--text);
  background: var(--border);
}

.search input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  padding: 2px 0;
}

.search input::placeholder {
  color: var(--muted);
  opacity: 0.7;
  font-weight: 400;
}

.layout {
  max-width: 900px;
  margin: 0 auto;
  padding: 10px 16px 60px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.head {
  padding: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.tab-bar {
  display: flex;
  flex: 1;
  min-width: 0;
}

.tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 12px 16px 10px;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.3s, background 0.3s;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab-btn h3 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.tab-btn h3 .tab-short {
  display: none;
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-btn:hover {
  background: rgba(0, 0, 0, .03);
}

[data-theme="dark"] .tab-btn:hover {
  background: rgba(255, 255, 255, .04);
}

.head .btns {
  display: flex;
  gap: 6px;
  padding: 8px 12px;
  flex-shrink: 0;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 92%, transparent);
  color: var(--text);
  padding: 7px 12px;
  border-radius: 10px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: inherit;
}

.btn:hover {
  background: var(--border);
  transform: translateY(-1px);
}

.btn:active {
  transform: scale(0.96);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border: none;
}

.btn.primary:hover {
  background: var(--accent-light);
}

.body {
  padding: 14px 16px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.25s ease both;
}

.warning-msg {
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 12px;
  text-align: center;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 14px;
}

/* ===== Tianzige (centered hanzi, always) ===== */
.tianzige-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  padding: 4px 0 8px;
}

.tianzige {
  width: 300px;
  height: 300px;
  max-width: 100%;
  position: relative;
  border: 2px solid var(--accent);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--card) 85%, transparent);
}

.grid-line {
  position: absolute;
  background: var(--accent);
  opacity: 0.25;
  pointer-events: none;
}

.h-mid {
  width: 100%;
  height: 1px;
  top: 50%;
  left: 0;
}

.v-mid {
  height: 100%;
  width: 1px;
  left: 50%;
  top: 0;
}

.grid-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  color: var(--accent);
}

.writer-target {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.writer-target svg {
  display: block;
  max-width: 100%;
  max-height: 100%;
  margin: 0 auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#hanzi-practice {
  position: absolute;
  inset: 0;
  z-index: 2;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#hanzi-practice svg {
  width: auto !important;
  height: auto !important;
  max-width: 100%;
  max-height: 100%;
  display: block;
  margin: auto;
}

/* Practice canvas size is controlled by JS (breakpoint) */
#hanzi-practice-wrap {
  width: 300px;
  height: 300px;
  flex: 0 0 auto;
}

/* ===== All view: 2 canvases side-by-side, max 4 per page ===== */
.tianzige-wrap.all-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  justify-items: center;
}

.tianzige-wrap.all-grid .tianzige {
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 1/1;
}

.all-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 8px 0 14px;
}

.all-nav .nav-btn {
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 8px;
}

.all-nav span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  min-width: 90px;
  text-align: center;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 8px 0 14px;
}

.nav-bar .nav-btn {
  font-size: 14px;
  padding: 6px 14px;
  border-radius: 8px;
}

.nav-bar span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  min-width: 60px;
  text-align: center;
}

/* ===== Speed slider (smooth custom) ===== */
.speed-box {
  margin-top: 10px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.025);
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  white-space: nowrap;
}

[data-theme="dark"] .speed-box {
  background: rgba(255, 255, 255, 0.05);
}

.speed-box label {
  font-weight: 600;
}

.speed-box #speed-val {
  font-weight: 700;
  color: var(--accent);
  min-width: 30px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.speed-box input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  min-width: 80px;
  height: 8px;
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  background: linear-gradient(to right,
      var(--accent) var(--fill, 50%),
      color-mix(in srgb, var(--text) 16%, transparent) var(--fill, 50%));
  transition: background 0.12s linear;
}

.speed-box input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-width 0.15s ease;
}

.speed-box input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.12);
}

.speed-box input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.22);
  box-shadow: 0 0 0 9px color-mix(in srgb, var(--accent) 16%, transparent);
  border-width: 4px;
}

.speed-box input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.speed-box input[type="range"]:active::-moz-range-thumb {
  transform: scale(1.2);
  box-shadow: 0 0 0 9px color-mix(in srgb, var(--accent) 16%, transparent);
}

.speed-box input[type="range"]::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: transparent;
}

/* ========== STEPS (display-only, no buttons, no borders) ========== */
.section {
  margin-top: 20px;
}

.section h4 {
  font-size: 13px;
  margin-bottom: 8px;
}

.steps-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 100%;
}

.steps-char-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.steps-char-tab {
  min-width: 36px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--muted);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.steps-char-tab:hover {
  border-color: var(--accent-light);
  color: var(--accent);
}

.steps-char-tab.active {
  background: var(--brand-soft);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}

.strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.mini-box {
  width: 75px;
  height: 75px;
  background: color-mix(in srgb, var(--card) 95%, transparent);
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 3px;
  pointer-events: none;
  cursor: default;
}

.mini-box:hover {
  border-color: var(--accent-light);
  transform: none;
  box-shadow: none;
}

.mini-box.active,
.mini-box.active-step {
  border-color: var(--accent);
  background: var(--brand-soft);
  box-shadow: none;
  transform: none;
}

.mini-box canvas {
  display: block;
  pointer-events: none;
  user-select: none;
}

.badge {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--accent);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  width: 17px;
  height: 17px;
  border-radius: 0 0 6px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

/* ===== Practice layout: reference model (larger) + writing area ===== */
.practice-layout {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 22px;
  padding: 4px 0 8px;
}

.reference-card {
  flex: 0 0 auto;
  text-align: center;
}

.reference-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: .3px;
}

.reference-svg {
  width: min(370px, 100%);
  aspect-ratio: 1/1;
  border-radius: 12px;
  overflow: hidden;
  background: color-mix(in srgb, var(--card) 90%, transparent);
  border: 2px solid var(--border);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .02);
  display: flex;
  align-items: center;
  justify-content: center;
}

.reference-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.practice-area {
  flex: 0 0 auto;
  text-align: center;
}

/* Practice */
.character-tabs {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.char-tab {
  min-width: 40px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  font-size: 20px;
  transition: all 0.2s;
}

.char-tab.active {
  color: var(--accent);
  background: var(--brand-soft);
  border-color: var(--accent-light);
}

.char-tab:hover {
  border-color: var(--accent-light);
}

.stroke-indicators {
  min-height: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px;
  margin-bottom: 9px;
}

.stroke-dot {
  min-width: 27px;
  height: 27px;
  padding: 0 6px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  transition: .18s ease;
}

.stroke-dot.current {
  background: var(--card);
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.stroke-dot.done {
  color: #fff;
  background: var(--success);
  border-color: var(--success);
}

.stroke-dot.score {
  min-width: 28px;
  border-radius: 5px;
  padding: 0 7px;
  background: var(--card);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.stroke-dot.score.low {
  color: #b91c1c;
  background: #fee2e2;
  border-color: #fca5a5;
}

.stroke-dot.score.medium {
  color: #a16207;
  background: #fef3c7;
  border-color: #fcd34d;
}

.stroke-dot.score.high {
  color: #15803d;
  background: #dcfce7;
  border-color: #86efac;
}

.status {
  text-align: center;
  min-height: 24px;
  margin: 9px 0 2px;
  font-size: 12px;
  color: var(--muted);
}

.status.success {
  color: var(--success);
  font-weight: 700;
}

.practice-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 8px;
}

.pm-btn {
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  transition: all 0.2s ease;
}

#hintBtn {
  color: #b45309;
  background: #fef3c7;
  border-color: #fcd34d;
}
[data-theme="dark"] #hintBtn {
  color: #fbbf24;
  background: rgba(251, 191, 36, 0.14);
  border-color: rgba(251, 191, 36, 0.45);
}
#hintBtn:hover {
  background: #fde68a;
  transform: translateY(-1px);
}

#outlineBtn {
  color: #6d28d9;
  background: #ede9fe;
  border-color: #c4b5fd;
}
[data-theme="dark"] #outlineBtn {
  color: #a78bfa;
  background: rgba(139, 116, 252, 0.14);
  border-color: rgba(167, 139, 250, 0.45);
}
#outlineBtn:hover {
  background: #ddd6fe;
  transform: translateY(-1px);
}

#retryBtn {
  color: #be123c;
  background: #ffe4e6;
  border-color: #fda4af;
}
[data-theme="dark"] #retryBtn {
  color: #fb7185;
  background: rgba(251, 113, 133, 0.14);
  border-color: rgba(251, 113, 133, 0.45);
}
#retryBtn:hover {
  background: #fecdd3;
  transform: translateY(-1px);
}

/* Result Overlay */
.result-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(20, 18, 28, .38);
  backdrop-filter: blur(3px);
}

.result-overlay.show {
  display: flex;
}

.result-card {
  width: min(320px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .18);
  padding: 24px 20px;
  text-align: center;
  position: relative;
}

.result-card .popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-card .result-actions .btn {
  padding: 12px 18px;
  font-size: 14px;
  border-radius: 12px;
  justify-content: center;
}

.stars {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  margin-bottom: 6px;
}

.star {
  width: 22px;
  height: 22px;
  color: #e0e0e0;
  fill: #e0e0e0;
}

.star.filled {
  color: #f2bd42;
  fill: #f2bd42;
}

.score-ring {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 8px auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.score-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-ring .track {
  fill: transparent;
  stroke: var(--border);
  stroke-width: 8;
}

.score-ring .progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset .4s ease;
}

.score-number {
  position: relative;
  font-size: 36px;
  line-height: 1;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.result-label {
  margin-top: 4px;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.result-actions {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
}

.tutorial-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tutorial-card {
  background: var(--card);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  max-width: 420px;
  width: 90%;
  padding: 30px 24px 20px;
  text-align: center;
}

.tutorial-step {
  display: none;
}

.tutorial-step.active {
  display: block;
}

.tutorial-step h3 {
  margin-bottom: 6px;
  font-size: 16px;
  color: var(--accent);
}

.tutorial-step p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}

.tut-icon {
  margin: 10px 0;
}

.tut-desc {
  font-size: 13px;
  color: var(--text);
}

.tutorial-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.tut-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.3s;
}

.dot.active {
  background: var(--accent);
}

.tut-skip {
  font-size: 11px;
  padding: 6px 10px;
}

.popup-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.popup-card {
  background: var(--card);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  max-width: 360px;
  width: 85%;
  padding: 30px 24px;
  text-align: center;
  position: relative;
}

.popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.popup-close:hover {
  color: var(--text);
  background: var(--border);
}

/* ===== Responsive ===== */
@media (max-width:768px) {
  .top-inner {
    height: 80px;
    padding: 0 12px;
    gap: 8px;
  }

  .logo-img {
    width: 130px !important;
    height: auto !important;
  }

  .brand-sub {
    font-size: 9px;
  }

  .lang-option {
    padding: 5px 10px;
    font-size: 10px;
  }

  .search {
    padding: 10px 12px;
    gap: 8px;
    border-width: 2px;
  }

  .search input {
    font-size: 15px;
  }

  .head .btns {
    padding: 6px 10px;
  }

  .btn {
    padding: 6px 9px;
    font-size: 11px;
  }

  .result-card .result-actions .btn {
    padding: 9px 12px;
    font-size: 12px;
  }

  .tab-btn h3 {
    font-size: 12px;
  }

  .tab-btn h3 .tab-full {
    display: none;
  }

  .tab-btn h3 .tab-short {
    display: inline;
  }

  .body {
    padding: 10px 12px;
  }

  .tianzige {
    width: 260px;
    height: 260px;
  }

  .mini-box {
    width: 75px;
    height: 75px;
  }

  #hanzi-practice-wrap {
    width: 260px;
    height: 260px;
  }

  .tianzige-wrap.all-grid {
    gap: 12px;
  }

  .reference-svg {
    width: min(320px, 100%);
  }

  /* Steps: horizontal scroll for mobile so the strip stays optimal */
  .strip {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    padding-bottom: 6px;
  }

  .mini-box {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }

  .steps-char-tabs {
    gap: 5px;
  }

  .steps-char-tab {
    min-width: 32px;
    height: 28px;
    padding: 0 8px;
    font-size: 16px;
  }

  .section {
    margin-top: 14px;
  }
}

@media (max-width:420px) {
  .top-inner {
    height: 74px;
    flex-direction: row;
    align-items: center;
  }

  .brand {
    flex-shrink: 1;
    min-width: 0;
  }

  .brand-sub {
    font-size: 8px;
  }

  .controls {
    gap: 6px;
  }

  .lang-option {
    padding: 4px 8px;
    font-size: 9px;
  }

  .tab-btn {
    padding: 10px 8px 8px;
  }

  .tab-btn h3 {
    font-size: 11px;
  }

  .head .btns {
    padding: 4px 8px;
    gap: 4px;
  }

  .btn {
    padding: 5px 7px;
    font-size: 10px;
  }

  .tianzige {
    width: 220px;
    height: 220px;
  }

  .mini-box {
    width: 75px;
    height: 75px;
  }

  .badge {
    width: 14px;
    height: 14px;
    font-size: 7px;
  }

  .logo-img {
    width: 110px !important;
    height: auto !important;
  }

  #hanzi-practice-wrap {
    width: 220px;
    height: 220px;
  }

  .tianzige-wrap.all-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .tianzige-wrap.all-grid .tianzige {
    border-width: 2px;
    border-radius: 6px;
  }

  .reference-svg {
    width: min(280px, 100%);
  }

  .speed-box {
    padding: 10px 12px;
    gap: 8px;
    font-size: 12px;
  }
}