@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Fira+Code:wght@400;500&display=swap');

:root {
  --bg: #0e0e16;
  --bg2: #13131f;
  --bg3: #1a1a2e;
  --card: #16162a;
  --border: rgba(255, 255, 255, 0.07);
  --border2: rgba(255, 255, 255, 0.12);
  --txt: #e8e8f8;
  --txt2: #7878a8;
  --txt3: #45456a;
  --purple: #7c3aed;
  --purple2: #9d5cf0;
  --purple-glow: rgba(124, 58, 237, 0.25);
  --cyan: #06b6d4;
  --green: #10b981;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --r: 12px;
  --r-sm: 8px;
  --sidebar: 270px;
}

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

html,
body {
  height: 100%;
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--txt);
  overflow: hidden
}

::-webkit-scrollbar {
  width: 4px
}

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

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px
}

/* ── APP SHELL ── */
#app {
  display: flex;
  height: 100vh;
  width: 100vw
}

/* ── SIDEBAR ── */
#sidebar {
  width: var(--sidebar);
  flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sb-head {
  padding: 20px 18px 14px;
  border-bottom: 1px solid var(--border)
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  box-shadow: 0 4px 16px var(--purple-glow)
}

.logo-txt {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.3px
}

.logo-txt em {
  font-style: normal;
  background: linear-gradient(135deg, #a78bfa, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent
}

.xp-wrap {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px
}

.xp-top {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--txt2);
  margin-bottom: 6px
}

.xp-top b {
  color: var(--purple2);
  font-weight: 600
}

.xp-track {
  height: 5px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden
}

.xp-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, #7c3aed, #9d5cf0);
  transition: width .6s cubic-bezier(.34, 1.56, .64, 1);
  box-shadow: 0 0 6px var(--purple-glow)
}

.sb-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0
}

.ch-head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px;
  cursor: pointer;
  transition: background .15s;
  user-select: none;
}

.ch-head:hover {
  background: rgba(255, 255, 255, 0.03)
}

.ch-icon {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0
}

.ch-info {
  flex: 1;
  min-width: 0
}

.ch-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--txt)
}

.ch-meta {
  font-size: 10px;
  color: var(--txt3);
  margin-top: 1px
}

.ch-arr {
  font-size: 9px;
  color: var(--txt3);
  transition: transform .2s
}

.ch-head.open .ch-arr {
  transform: rotate(90deg)
}

.ls-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px 8px 28px;
  cursor: pointer;
  transition: all .15s;
  border-left: 2px solid transparent;
}

.ls-item:hover {
  background: rgba(255, 255, 255, 0.03)
}

.ls-item.active {
  background: rgba(124, 58, 237, 0.08);
  border-left-color: var(--purple)
}

.ls-item.locked {
  opacity: .35;
  cursor: not-allowed
}

.ls-ico {
  width: 18px;
  font-size: 12px;
  flex-shrink: 0;
  text-align: center
}

.ls-name {
  flex: 1;
  font-size: 12px;
  font-weight: 500;
  color: var(--txt);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis
}

.ls-xp {
  font-size: 10px;
  color: var(--txt3);
  flex-shrink: 0
}

.sb-foot {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px
}

.s-pill {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 8px;
  text-align: center
}

.s-pill .v {
  font-size: 15px;
  font-weight: 700
}

.s-pill .l {
  font-size: 10px;
  color: var(--txt2)
}

/* ── MAIN ── */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0
}

/* topbar */
#topbar {
  height: 52px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}

.tb-title {
  font-size: 14px;
  font-weight: 600;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis
}

.chip {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(124, 58, 237, 0.15);
  color: var(--purple2)
}

.chip.g {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green)
}

/* views */
#views {
  flex: 1;
  overflow: hidden;
  position: relative
}

.view {
  display: none;
  width: 100%;
  height: 100%
}

.view.active {
  display: flex
}

/* ── HOME ── */
#home-view {
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse 60% 60% at 50% 0%, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
}

.home-inner {
  max-width: 540px;
  text-align: center;
  padding: 40px 20px
}

.h-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--purple2);
  margin-bottom: 22px;
  letter-spacing: .5px;
}

.h-title {
  font-size: 44px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 14px
}

.h-title span {
  background: linear-gradient(135deg, #a78bfa, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent
}

.h-sub {
  font-size: 15px;
  color: var(--txt2);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto
}

.h-stats {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px
}

.h-stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px 20px;
  min-width: 90px;
}

.h-stat .n {
  font-size: 26px;
  font-weight: 800
}

.h-stat .t {
  font-size: 10px;
  color: var(--txt2);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-top: 2px
}

/* ── LESSON ── */
#lesson-view {
  flex-direction: column;
  overflow: hidden
}

.lesson-body {
  flex: 1;
  overflow: hidden;
  display: flex;
}

/* theory */
#theory-panel {
  flex: 1;
  overflow-y: auto;
  padding: 32px 36px 80px;
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

/* when ide open, theory shrinks */
.ide-open #theory-panel {
  max-width: none;
  flex: 0 0 45%;
  border-right: 1px solid var(--border)
}

.ide-open #ide-panel {
  display: flex
}

#theory-panel h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -.5px
}

#theory-panel h3 {
  font-size: 14px;
  font-weight: 700;
  margin: 22px 0 10px;
  color: var(--txt);
  text-transform: uppercase;
  letter-spacing: .5px
}

#theory-panel p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--txt2);
  margin-bottom: 12px
}

#theory-panel ul {
  padding-left: 18px;
  margin-bottom: 12px
}

#theory-panel li {
  font-size: 13px;
  line-height: 1.7;
  color: var(--txt2)
}

.code-ex {
  background: #080812;
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  padding: 0;
  margin: 14px 0;
  overflow: hidden;
}

.code-ex pre {
  margin: 0 !important;
  border-radius: 0 !important;
  font-family: 'Fira Code', monospace !important;
  font-size: 13px !important;
  line-height: 1.65 !important;
}

.info-box,
.tip-box {
  display: flex;
  gap: 10px;
  border-radius: var(--r-sm);
  padding: 14px;
  margin: 14px 0;
  font-size: 13px;
}

.info-box {
  background: rgba(6, 182, 212, .07);
  border: 1px solid rgba(6, 182, 212, .18)
}

.info-box strong {
  color: var(--cyan);
  display: block;
  margin-bottom: 5px;
  font-size: 13px
}

.tip-box {
  background: rgba(245, 158, 11, .07);
  border: 1px solid rgba(245, 158, 11, .18)
}

.tip-box p {
  color: var(--txt2);
  margin: 0;
  font-size: 13px
}

.tip-box code,
.info-box code {
  background: rgba(255, 255, 255, .08);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  color: var(--amber)
}

.dt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
  margin: 14px 0
}

.dt-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px;
  text-align: center;
  transition: all .2s
}

.dt-card:hover {
  border-color: var(--purple);
  background: rgba(124, 58, 237, 0.08)
}

.dt-card code {
  display: block;
  font-family: 'Fira Code', monospace;
  font-size: 14px;
  color: var(--purple2);
  font-weight: 600;
  margin-bottom: 4px
}

.dt-card span {
  font-size: 11px;
  color: var(--txt2);
  display: block
}

.dt-card small {
  font-size: 10px;
  color: var(--txt3)
}

.op-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 10px 0
}

.op-table th {
  text-align: left;
  padding: 7px 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--txt2);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px
}

.op-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--txt2)
}

.op-table td code {
  color: var(--amber);
  font-family: 'Fira Code', monospace
}

/* lesson action bar */
.lesson-bar {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg2);
}

.task-txt {
  flex: 1;
  font-size: 12px;
  color: var(--txt2)
}

.task-txt strong {
  color: var(--txt)
}

/* ── IDE PANEL ── */
#ide-panel {
  display: none;
  /* hidden by default */
  flex: 0 0 55%;
  flex-direction: column;
  overflow: hidden;
  background: #070710;
  border-left: 1px solid var(--border);
}

.ide-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: #0a0a18;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.ide-dots span {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 3px
}

.dot-r {
  background: #ff5f57
}

.dot-y {
  background: #febc2e
}

.dot-g {
  background: #28c840
}

.ide-fname {
  font-size: 11px;
  color: var(--txt2);
  font-family: 'Fira Code', monospace;
  flex: 1
}

#monaco-container {
  flex: 1;
  overflow: hidden
}

.ide-bot {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: #0a0a18;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.ide-task {
  flex: 1;
  font-size: 11px;
  color: var(--txt2)
}

.ide-task strong {
  color: var(--txt)
}

#output-panel {
  height: 110px;
  flex-shrink: 0;
  background: #04040e;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.out-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 10px;
  color: var(--txt2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.out-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: blink 2s infinite
}

@keyframes blink {

  0%,
  100% {
    opacity: 1
  }

  50% {
    opacity: .3
  }
}

#output-txt {
  flex: 1;
  overflow-y: auto;
  padding: 7px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--green);
}

#output-txt.err {
  color: var(--rose)
}

#output-txt.dim {
  color: var(--txt2)
}

/* ── QUIZ ── */
#quiz-view {
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  padding: 40px 24px;
  background: radial-gradient(ellipse 50% 40% at 50% 0%, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
}

.qz-top {
  text-align: center;
  max-width: 800px;
  width: 100%;
  margin-bottom: 28px
}

.qz-top h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 6px
}

.qz-top p {
  font-size: 13px;
  color: var(--txt2)
}

.qz-prog {
  width: 100%;
  max-width: 800px;
  height: 4px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  margin-bottom: 28px;
  overflow: hidden
}

.qz-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--purple), var(--purple2));
  transition: width .4s ease
}

.qz-card {
  width: 100%;
  max-width: 800px;
  background: var(--card);
  border: 1px solid var(--border2);
  border-radius: 14px;
  padding: 28px;
  animation: fadeUp .3s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px)
  }

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

.q-num {
  font-size: 10px;
  color: var(--txt3);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px
}

.q-txt {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  margin-bottom: 26px
}

.q-opts {
  display: flex;
  flex-direction: column;
  gap: 14px
}

.q-opt {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all .18s;
  font-size: 15px;
}

.q-opt:hover {
  border-color: var(--purple);
  background: rgba(124, 58, 237, 0.07)
}

.q-opt.sel {
  border-color: var(--purple);
  background: rgba(124, 58, 237, 0.1)
}

.q-opt.ok {
  border-color: var(--green);
  background: rgba(16, 185, 129, 0.08);
  color: var(--green)
}

.q-opt.bad {
  border-color: var(--rose);
  background: rgba(244, 63, 94, 0.07);
  color: var(--rose)
}

.opt-l {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  transition: all .18s;
}

.q-opt.sel .opt-l {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff
}

.q-opt.ok .opt-l {
  background: var(--green);
  border-color: var(--green);
  color: #fff
}

.q-opt.bad .opt-l {
  background: var(--rose);
  border-color: var(--rose);
  color: #fff
}

.qz-feedback {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--r-sm);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.qz-feedback.ok {
  background: rgba(16, 185, 129, 0.1);
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.qz-feedback.err {
  background: rgba(244, 63, 94, 0.1);
  color: var(--rose);
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.q-actions {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center
}

/* quiz result */
.qz-res {
  width: 100%;
  max-width: 480px;
  text-align: center;
  animation: fadeUp .4s ease
}

.res-em {
  font-size: 68px;
  margin-bottom: 14px
}

.res-sc {
  font-size: 52px;
  font-weight: 900;
  margin-bottom: 6px;
  letter-spacing: -2px
}

.res-sc.p {
  background: linear-gradient(135deg, var(--green), #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent
}

.res-sc.g {
  background: linear-gradient(135deg, var(--purple), var(--purple2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent
}

.res-sc.b {
  background: linear-gradient(135deg, var(--amber), var(--rose));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent
}

.res-ttl {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px
}

.res-sub {
  font-size: 13px;
  color: var(--txt2);
  margin-bottom: 24px
}

.xp-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(124, 58, 237, 0.12);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: 20px;
  padding: 7px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--purple2);
  margin-bottom: 24px;
}

.res-btns {
  display: flex;
  gap: 10px;
  justify-content: center
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .18s;
  font-family: 'Inter', sans-serif;
}

.btn:active {
  transform: scale(.97)
}

.btn-p {
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  color: #fff;
  box-shadow: 0 4px 14px var(--purple-glow)
}

.btn-p:hover {
  box-shadow: 0 4px 20px rgba(124, 58, 237, .45);
  transform: translateY(-1px)
}

.btn-g {
  background: linear-gradient(135deg, var(--green), #059669);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, .25)
}

.btn-g:hover {
  box-shadow: 0 4px 20px rgba(16, 185, 129, .4);
  transform: translateY(-1px)
}

.btn-ghost {
  background: rgba(255, 255, 255, .05);
  color: var(--txt2);
  border: 1px solid var(--border)
}

.btn-ghost:hover {
  border-color: var(--border2);
  color: var(--txt)
}

.btn-ide {
  background: rgba(124, 58, 237, .12);
  color: var(--purple2);
  border: 1px solid rgba(124, 58, 237, .25)
}

.btn-ide:hover {
  background: rgba(124, 58, 237, .2);
  border-color: var(--purple)
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px
}

/* ── PAIR PROGRAMMER ── */
.btn-pair {
  background: rgba(6, 182, 212, .12);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, .3);
}

.btn-pair:hover {
  background: rgba(6, 182, 212, .2);
  border-color: rgba(6, 182, 212, .45);
}

.pair-panel {
  position: absolute;
  right: 16px;
  bottom: 126px;
  width: min(420px, calc(100% - 32px));
  max-height: 56%;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(12, 16, 34, .96), rgba(9, 12, 26, .96));
  border: 1px solid rgba(124, 58, 237, .35);
  border-radius: 12px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45), 0 0 0 1px rgba(124, 58, 237, .12) inset;
  backdrop-filter: blur(8px);
  z-index: 55;
  transform: translateY(12px);
  opacity: 0;
  transition: transform .22s ease, opacity .22s ease;
}

.pair-panel.open {
  transform: translateY(0);
  opacity: 1
}

.pp-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.pp-avatar {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(124, 58, 237, .15);
  border: 1px solid rgba(124, 58, 237, .35);
}

.pp-title-wrap {
  flex: 1;
  min-width: 0
}

.pp-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--txt)
}

.pp-subtitle {
  font-size: 11px;
  color: var(--txt2)
}

.pp-close {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .03);
  color: var(--txt2);
  cursor: pointer;
}

.pp-close:hover {
  color: var(--txt);
  border-color: var(--border2)
}

.pp-body {
  padding: 12px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pp-bubble {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border2);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--txt);
  animation: fadeUp .25s ease;
}

.pp-bubble code {
  background: rgba(255, 255, 255, .08);
  color: var(--amber);
  border-radius: 5px;
  padding: 1px 5px;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
}

.pp-tip-note {
  font-size: 11px;
  color: var(--txt3);
}

.pp-progress {
  display: flex;
  gap: 6px;
  align-items: center;
}

.pp-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .2);
}

.pp-dot.active {
  background: var(--purple2);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, .15);
}

.pp-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  padding: 10px 16px;
  font-size: 13px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .5);
  animation: toastIn .25s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(8px)
  }

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

.toast.ok {
  border-color: rgba(16, 185, 129, .35)
}

.toast.err {
  border-color: rgba(244, 63, 94, .35)
}

#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998
}

/* ── MINIMALIST THEME OVERRIDES ── */
:root {
  --bg: #0b1020;
  --bg2: #0f172a;
  --bg3: #111827;
  --card: #0f172a;
  --border: rgba(148, 163, 184, 0.22);
  --border2: rgba(148, 163, 184, 0.32);
  --txt: #e2e8f0;
  --txt2: #a5b4cc;
  --txt3: #7c8ba5;
  --purple: #6366f1;
  --purple2: #818cf8;
  --purple-glow: rgba(99, 102, 241, 0.12);
  --cyan: #38bdf8;
  --green: #22c55e;
  --amber: #f59e0b;
  --rose: #fb7185;
  --r: 10px;
  --r-sm: 8px;
}

#sidebar,
#topbar,
.h-stat,
.qz-card,
.s-pill,
.xp-wrap,
#theory-panel .code-ex,
#theory-panel .info-box,
#theory-panel .tip-box,
.pair-panel,
#output-panel {
  box-shadow: none !important;
}

.logo-icon {
  background: #1e293b !important;
  border: 1px solid var(--border2);
}

.logo-txt em,
.h-title span,
.res-sc.p,
.res-sc.g,
.res-sc.b {
  -webkit-text-fill-color: initial !important;
  background: none !important;
  color: var(--txt) !important;
}

#home-view,
#quiz-view {
  background: var(--bg) !important;
}

.btn {
  border: 1px solid var(--border);
  transform: none !important;
}

.btn-p {
  background: #334155;
  color: #f8fafc;
}

.btn-p:hover {
  background: #3f4d63;
}

.btn-g {
  background: #166534;
}

.btn-g:hover {
  background: #15803d;
}

.btn-ghost {
  background: transparent;
}

.btn-ide {
  background: transparent;
}

.ls-item.active {
  background: rgba(99, 102, 241, 0.12);
  border-left-color: #818cf8;
}

.q-opt:hover,
.q-opt.sel {
  border-color: #64748b;
  background: rgba(148, 163, 184, 0.08);
}

.pair-panel {
  background: #0f172a;
  border-color: var(--border2);
  backdrop-filter: none;
}

.deep-dive-box {
  margin-top: 20px;
  padding: 14px;
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  background: rgba(148, 163, 184, 0.06);
}

.deep-dive-box h3 {
  margin: 0 0 8px 0;
  text-transform: none !important;
  letter-spacing: normal !important;
  font-size: 14px;
}

.deep-dive-box ul {
  margin: 0;
}