/* ============================================================
   BAB 10 — ADVANCED MOBILE FEATURES
   Theme: VIP LEGEND
   Palette: Obsidian #0D0D1A / Violet #7B2FBE / Cyan #00F5FF / Gold #FFD700
   ============================================================ */

:root {
  --obsidian: #0D0D1A;
  --obsidian-2: #15152b;
  --obsidian-3: #1d1d3a;
  --violet: #7B2FBE;
  --violet-soft: #9d5cd6;
  --cyan: #00F5FF;
  --gold: #FFD700;
  --txt: #EAEAF5;
  --txt-dim: #A0A0C0;
  --glass: rgba(255, 255, 255, 0.04);
  --glass-brd: rgba(123, 47, 190, 0.35);
  --shadow-violet: 0 0 40px rgba(123, 47, 190, 0.45);
  --shadow-cyan: 0 0 30px rgba(0, 245, 255, 0.35);
  --font-head: 'Orbitron', 'Segoe UI', sans-serif;
  --font-body: 'Rajdhani', 'Segoe UI', sans-serif;
  --slide-max: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--obsidian);
  color: var(--txt);
  overflow-x: hidden;
  min-width: 1024px;
}

/* ---------- Animated deep gradient backdrop ---------- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(circle at 15% 20%, rgba(123, 47, 190, 0.25), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(0, 245, 255, 0.15), transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(255, 215, 0, 0.05), transparent 50%),
    linear-gradient(135deg, #0D0D1A 0%, #15152b 50%, #0a0a16 100%);
  background-size: 200% 200%;
  animation: bgShift 18s ease infinite;
}
@keyframes bgShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- Hexagonal tech grid overlay ---------- */
.hex-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: 0.06;
  background-image:
    repeating-linear-gradient(60deg, transparent, transparent 38px, rgba(0,245,255,.4) 39px, transparent 40px),
    repeating-linear-gradient(-60deg, transparent, transparent 38px, rgba(123,47,190,.4) 39px, transparent 40px),
    repeating-linear-gradient(0deg, transparent, transparent 38px, rgba(255,215,0,.2) 39px, transparent 40px);
  animation: gridDrift 30s linear infinite;
}
@keyframes gridDrift { from { background-position: 0 0; } to { background-position: 240px 240px; } }

/* ---------- Particle canvas ---------- */
#particle-canvas { position: fixed; inset: 0; z-index: -1; pointer-events: none; }

/* ============================================================
   SLIDE SYSTEM — each slide is full-viewport + own scroll
   ============================================================ */
.deck { width: 100%; }

.slide {
  display: none;
  min-height: 100vh;
  width: 100%;
  padding: 80px 40px 110px;
  overflow-y: auto;
  overflow-x: hidden;
  animation: slideIn 0.7s cubic-bezier(.2,.8,.2,1);
}
.slide.active { display: block; }
@keyframes slideIn {
  from { opacity: 0; transform: translateY(30px) scale(.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.slide-inner {
  max-width: var(--slide-max);
  margin: 0 auto;
}

/* custom scrollbar */
.slide::-webkit-scrollbar { width: 10px; }
.slide::-webkit-scrollbar-track { background: rgba(255,255,255,.03); }
.slide::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--violet), var(--cyan));
  border-radius: 10px;
}

/* ---------- Slide chrome: kicker / title ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: .72rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 6px 16px;
  border: 1px solid var(--glass-brd);
  border-radius: 30px;
  background: var(--glass);
  margin-bottom: 18px;
  box-shadow: var(--shadow-cyan);
}
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 10px var(--gold); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1);} 50% { opacity: .4; transform: scale(.6);} }

h1.title {
  font-family: var(--font-head);
  font-size: 2.7rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 14px;
  background: linear-gradient(120deg, #fff 0%, var(--cyan) 40%, var(--violet-soft) 75%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 18px rgba(123,47,190,.5));
}
h2.sub { font-family: var(--font-head); font-size: 1.5rem; color: var(--gold); margin: 30px 0 14px; }
h3.sub3 { font-family: var(--font-head); font-size: 1.1rem; color: var(--cyan); margin: 22px 0 10px; letter-spacing: 1px; }
p.lead { font-size: 1.18rem; color: var(--txt-dim); line-height: 1.7; max-width: 820px; }
p.body { font-size: 1.05rem; color: var(--txt); line-height: 1.75; margin: 10px 0; }

/* ---------- Section labels following the mandated pattern ---------- */
.flow-tag {
  display: inline-block;
  font-family: var(--font-head);
  font-size: .68rem;
  letter-spacing: 2px;
  padding: 4px 12px;
  border-radius: 6px;
  margin: 26px 0 8px;
  text-transform: uppercase;
}
.flow-tag.point   { background: rgba(0,245,255,.12);  color: var(--cyan);  border-left: 3px solid var(--cyan); }
.flow-tag.analogi { background: rgba(255,215,0,.12);  color: var(--gold);  border-left: 3px solid var(--gold); }
.flow-tag.jelas   { background: rgba(157,92,214,.16); color: var(--violet-soft); border-left: 3px solid var(--violet); }
.flow-tag.code    { background: rgba(0,245,255,.10);  color: var(--cyan);  border-left: 3px solid var(--cyan); }
.flow-tag.demo    { background: rgba(255,215,0,.10);  color: var(--gold);  border-left: 3px solid var(--gold); }

/* ---------- Glass panels ---------- */
.panel {
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  border-radius: 18px;
  padding: 24px 26px;
  margin: 16px 0;
  backdrop-filter: blur(8px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05), 0 12px 40px rgba(0,0,0,.4);
  position: relative;
  overflow: hidden;
}
.panel::before {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  animation: scanline 4s linear infinite;
}
@keyframes scanline { to { left: 100%; } }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }

/* feature cards */
.feat-card {
  background: linear-gradient(160deg, var(--obsidian-2), var(--obsidian-3));
  border: 1px solid var(--glass-brd);
  border-radius: 16px;
  padding: 20px;
  transition: .35s;
  cursor: default;
}
.feat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-violet); border-color: var(--cyan); }
.feat-card .ic { font-size: 2rem; margin-bottom: 10px; }
.feat-card h4 { font-family: var(--font-head); color: var(--gold); font-size: .95rem; margin-bottom: 6px; }
.feat-card p { color: var(--txt-dim); font-size: .92rem; line-height: 1.5; }

/* ---------- Code blocks ---------- */
.code-wrap {
  position: relative;
  margin: 14px 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--glass-brd);
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
}
.code-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  background: #0a0a14;
  border-bottom: 1px solid var(--glass-brd);
  font-family: var(--font-head);
  font-size: .72rem; color: var(--txt-dim); letter-spacing: 1px;
}
.code-bar .b { width: 12px; height: 12px; border-radius: 50%; }
.code-bar .r { background: #ff5f56; } .code-bar .y { background: #ffbd2e; } .code-bar .g { background: #27c93f; }
.code-bar .fname { margin-left: auto; color: var(--cyan); }
pre[class*="language-"] { margin: 0 !important; border-radius: 0 !important; max-height: 460px; font-size: .9rem; }
code[class*="language-"] { font-family: 'Fira Code','Consolas',monospace; }

/* ============================================================
   3D ROTATING CUBE (Slide 1)
   ============================================================ */
.scene { width: 220px; height: 220px; perspective: 900px; margin: 30px auto; }
.cube { width: 100%; height: 100%; position: relative; transform-style: preserve-3d; animation: spinCube 14s linear infinite; }
@keyframes spinCube {
  from { transform: rotateX(-20deg) rotateY(0deg); }
  to   { transform: rotateX(-20deg) rotateY(360deg); }
}
.cube .face {
  position: absolute; width: 220px; height: 220px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 2px solid var(--cyan);
  background: rgba(123,47,190,.18);
  box-shadow: inset 0 0 40px rgba(0,245,255,.3), 0 0 30px rgba(123,47,190,.5);
  font-family: var(--font-head);
  color: var(--cyan);
  backdrop-filter: blur(2px);
}
.cube .face .ic { font-size: 2.6rem; }
.cube .face .lbl { font-size: .8rem; letter-spacing: 2px; margin-top: 8px; color: var(--gold); }
.cube .front  { transform: rotateY(0deg)   translateZ(110px); }
.cube .back   { transform: rotateY(180deg) translateZ(110px); }
.cube .right  { transform: rotateY(90deg)  translateZ(110px); }
.cube .left   { transform: rotateY(-90deg) translateZ(110px); }
.cube .top    { transform: rotateX(90deg)  translateZ(110px); }
.cube .bottom { transform: rotateX(-90deg) translateZ(110px); }

/* ============================================================
   2D ANIMATION STAGES (analogi) — reusable
   ============================================================ */
.stage {
  position: relative;
  height: 240px;
  border-radius: 16px;
  background: radial-gradient(circle at 50% 30%, rgba(123,47,190,.15), transparent 70%), #0a0a16;
  border: 1px solid var(--glass-brd);
  overflow: hidden;
  margin: 14px 0;
}
.ground { position: absolute; bottom: 28px; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); opacity: .5; }

/* generic moving actor */
.actor { position: absolute; font-size: 2.4rem; filter: drop-shadow(0 0 12px var(--cyan)); }

/* — camera analogy: photographer + flash — */
.anim-camera .lens { left: 50%; top: 40%; transform: translate(-50%,-50%); font-size: 4rem; animation: lensZoom 3s ease-in-out infinite; }
@keyframes lensZoom { 0%,100% { transform: translate(-50%,-50%) scale(1);} 50% { transform: translate(-50%,-50%) scale(1.18);} }
.anim-camera .flash { position: absolute; inset: 0; background: #fff; opacity: 0; animation: flash 3s infinite; }
@keyframes flash { 0%,46%,54%,100% { opacity: 0;} 50% { opacity: .85;} }

/* — moving courier (share / deep link) — */
.courier { bottom: 40px; left: -60px; animation: runRight 5s linear infinite; }
@keyframes runRight { from { left: -60px;} to { left: 105%;} }
.bob { animation: bob .5s ease-in-out infinite alternate; display:inline-block;}
@keyframes bob { from { transform: translateY(0);} to { transform: translateY(-8px);} }

/* — envelope flying (notification) — */
.fly-note { font-size: 2.2rem; bottom: 50px; left: -50px; animation: flyArc 4s ease-in-out infinite; }
@keyframes flyArc {
  0% { left: -50px; bottom: 50px; opacity: 0;}
  15% { opacity: 1;}
  50% { bottom: 150px;}
  85% { opacity: 1;}
  100% { left: 105%; bottom: 60px; opacity: 0;}
}

/* — pulsing bell — */
.bell { left: 50%; top: 45%; transform: translateX(-50%); font-size: 3.4rem; transform-origin: top center; animation: ring 1.4s ease-in-out infinite; }
@keyframes ring { 0%,100% { transform: translateX(-50%) rotate(0);} 20% { transform: translateX(-50%) rotate(16deg);} 40% { transform: translateX(-50%) rotate(-12deg);} 60% { transform: translateX(-50%) rotate(8deg);} 80% { transform: translateX(-50%) rotate(-4deg);} }

/* — clock ticking (scheduled) — */
.clock { left: 50%; top: 45%; transform: translateX(-50%); font-size: 3.6rem; }
.clock .hand { position:absolute; left:50%; top:50%; width:2px; height:34px; background:var(--gold); transform-origin: bottom center; animation: tick 6s steps(12) infinite; }
@keyframes tick { to { transform: rotate(360deg);} }

/* — file folder opening — */
.folder { left: 50%; top: 42%; transform: translateX(-50%); font-size: 3.6rem; animation: bobSlow 2.4s ease-in-out infinite; }
@keyframes bobSlow { 0%,100% { transform: translateX(-50%) translateY(0);} 50% { transform: translateX(-50%) translateY(-14px);} }

/* — document/PDF pages — */
.doc-fly { font-size: 2.6rem; bottom: 60px; animation: docUp 3.5s ease-in-out infinite; }
@keyframes docUp { 0%,100% { transform: translateY(0) rotate(-4deg);} 50% { transform: translateY(-40px) rotate(4deg);} }

/* — rocket launcher (url launcher) — */
.rocket { left: 46%; bottom: 40px; font-size: 3rem; animation: launch 4s ease-in infinite; }
@keyframes launch { 0% { bottom: 40px; opacity:1;} 70% { bottom: 60px;} 100% { bottom: 220px; opacity: 0;} }

/* particle burst dots inside stage */
.spark { position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 10px var(--gold); }

/* ============================================================
   ANIMATED FLOWCHART (SVG / CSS)
   ============================================================ */
.flow {
  display: flex; align-items: center; justify-content: center;
  gap: 0; flex-wrap: wrap; margin: 16px 0; padding: 18px;
}
.flow-node {
  min-width: 130px; text-align: center;
  padding: 14px 16px; border-radius: 12px;
  background: linear-gradient(160deg, var(--obsidian-2), var(--obsidian-3));
  border: 1px solid var(--glass-brd);
  font-family: var(--font-head); font-size: .82rem; color: var(--txt);
  opacity: 0; transform: translateY(14px);
  animation: nodeIn .6s forwards;
}
.flow-node .nic { font-size: 1.5rem; display:block; margin-bottom: 6px; }
.flow-node.glow-cyan { border-color: var(--cyan); box-shadow: var(--shadow-cyan); }
.flow-node.glow-gold { border-color: var(--gold); box-shadow: 0 0 26px rgba(255,215,0,.4); }
.flow-node.glow-violet { border-color: var(--violet); box-shadow: var(--shadow-violet); }
@keyframes nodeIn { to { opacity: 1; transform: translateY(0);} }

.flow-arrow {
  width: 56px; height: 2px; position: relative;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  margin: 0 4px;
}
.flow-arrow::after {
  content: ''; position: absolute; right: -2px; top: -4px;
  border-left: 8px solid var(--cyan);
  border-top: 5px solid transparent; border-bottom: 5px solid transparent;
}
.flow-arrow .pkt {
  position: absolute; top: -3px; left: 0;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--gold); box-shadow: 0 0 10px var(--gold);
  animation: pktMove 1.8s linear infinite;
}
@keyframes pktMove { from { left: 0; } to { left: 100%; } }

/* vertical flow variant */
.flow-v { flex-direction: column; }
.flow-v .flow-arrow { width: 2px; height: 40px; background: linear-gradient(180deg, var(--violet), var(--cyan)); }
.flow-v .flow-arrow::after { right: -4px; top: auto; bottom: -2px; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 8px solid var(--cyan); border-bottom: none; }
.flow-v .flow-arrow .pkt { left: -3px; top: 0; animation: pktMoveV 1.8s linear infinite; }
@keyframes pktMoveV { from { top: 0; } to { top: 100%; } }

/* ---------- phone mock (demo) ---------- */
.phone {
  width: 230px; height: 460px; margin: 10px auto;
  border-radius: 32px; border: 3px solid var(--glass-brd);
  background: #07070f; padding: 14px 10px;
  box-shadow: var(--shadow-violet), inset 0 0 40px rgba(0,0,0,.6);
  position: relative; overflow: hidden;
}
.phone .notch { width: 90px; height: 18px; background:#000; border-radius:0 0 14px 14px; margin: 0 auto 10px; }
.phone-screen { height: calc(100% - 30px); border-radius: 18px; background: linear-gradient(160deg,#10101f,#1a1a35); overflow:hidden; position: relative; }

.app-bar { height: 52px; background: linear-gradient(90deg,var(--violet),var(--cyan)); display:flex; align-items:center; padding: 0 14px; font-family: var(--font-head); font-size:.8rem; color:#fff; font-weight:700; }
.app-body { padding: 14px; }
.toast {
  position: absolute; left: 14px; right: 14px; bottom: 16px;
  background: rgba(255,215,0,.95); color:#1a1a1a;
  padding: 12px 14px; border-radius: 12px; font-weight: 700; font-size: .82rem;
  transform: translateY(80px); opacity: 0;
}
.toast.show { animation: toastPop 3.2s ease-in-out infinite; }
@keyframes toastPop { 0%,100% { transform: translateY(80px); opacity: 0;} 15%,70% { transform: translateY(0); opacity: 1;} }

.btn-demo {
  display: inline-block; padding: 10px 18px; border-radius: 10px;
  background: linear-gradient(90deg,var(--violet),var(--cyan));
  color:#fff; font-family: var(--font-head); font-weight:700; font-size:.8rem;
  border: none; cursor: pointer; margin: 6px 4px; transition:.25s;
  box-shadow: var(--shadow-violet);
}
.btn-demo:hover { transform: translateY(-3px) scale(1.04); }

/* notification card demo */
.notif-card {
  display: flex; gap: 10px; align-items: flex-start;
  background: rgba(255,255,255,.08); border-radius: 12px; padding: 12px;
  margin: 8px 0; border-left: 3px solid var(--gold);
  opacity: 0; transform: translateX(40px);
  animation: notifIn .6s forwards;
}
@keyframes notifIn { to { opacity:1; transform: translateX(0);} }
.notif-card .nic { font-size: 1.4rem; }
.notif-card .ntxt b { color:#fff; font-size:.82rem; } .notif-card .ntxt p { color: var(--txt-dim); font-size:.74rem; margin-top:2px;}

/* ---------- bullet lists ---------- */
ul.vip { list-style: none; margin: 10px 0; }
ul.vip li { position: relative; padding: 8px 0 8px 30px; color: var(--txt); line-height: 1.6; }
ul.vip li::before { content: '◈'; position: absolute; left: 4px; color: var(--cyan); }
ul.vip li b { color: var(--gold); }

.tip {
  border-left: 4px solid var(--gold);
  background: rgba(255,215,0,.08);
  padding: 14px 18px; border-radius: 0 12px 12px 0; margin: 16px 0;
  color: var(--txt);
}
.tip b { color: var(--gold); }
.warn { border-left: 4px solid #ff5f7e; background: rgba(255,95,126,.08); padding: 14px 18px; border-radius: 0 12px 12px 0; margin: 16px 0; }
.warn b { color: #ff5f7e; }

/* pubspec / terminal block */
.term {
  background: #07070f; border:1px solid var(--glass-brd); border-radius: 12px;
  padding: 16px 18px; font-family: 'Fira Code',monospace; font-size:.88rem;
  color: var(--cyan); margin: 12px 0; overflow-x:auto;
}
.term .cmt { color: var(--txt-dim); }
.term .pkg { color: var(--gold); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: 56px; z-index: 50;
  display: flex; align-items: center; padding: 0 24px;
  background: rgba(10,10,20,.7); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--glass-brd);
}
.topbar .brand { font-family: var(--font-head); font-weight: 900; letter-spacing: 2px; font-size: .95rem;
  background: linear-gradient(90deg,var(--cyan),var(--gold)); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.topbar .brand span { color: var(--violet-soft); -webkit-text-fill-color: var(--violet-soft); }
.progress-wrap { flex: 1; height: 6px; background: rgba(255,255,255,.08); border-radius: 6px; margin: 0 24px; overflow: hidden; }
.progress-bar { height: 100%; width: 0; background: linear-gradient(90deg,var(--violet),var(--cyan),var(--gold)); transition: width .4s; box-shadow: var(--shadow-cyan); }
.slide-count { font-family: var(--font-head); font-size: .8rem; color: var(--txt-dim); min-width: 64px; text-align: right; }

.navbtns { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 50; display: flex; gap: 14px; align-items: center;
  background: rgba(10,10,20,.7); backdrop-filter: blur(14px); padding: 10px 16px; border-radius: 40px; border: 1px solid var(--glass-brd); box-shadow: 0 10px 40px rgba(0,0,0,.5); }
.nav-btn {
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--glass-brd);
  background: linear-gradient(160deg,var(--obsidian-2),var(--obsidian-3)); color: var(--cyan);
  font-size: 1.2rem; cursor: pointer; transition: .25s; display: flex; align-items: center; justify-content: center;
}
.nav-btn:hover { transform: scale(1.12); box-shadow: var(--shadow-cyan); border-color: var(--cyan); }
.nav-btn:disabled { opacity: .3; cursor: not-allowed; }
.nav-dots { display: flex; gap: 7px; max-width: 360px; flex-wrap: wrap; justify-content:center; }
.nav-dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.2); cursor: pointer; transition: .25s; }
.nav-dot.active { background: var(--gold); box-shadow: 0 0 10px var(--gold); transform: scale(1.3); }

/* slide menu */
.menu-btn { margin-left: 16px; background: none; border: none; color: var(--cyan); font-size: 1.4rem; cursor: pointer; }
.menu {
  position: fixed; top: 56px; right: 0; width: 320px; height: calc(100vh - 56px); z-index: 49;
  background: rgba(10,10,20,.92); backdrop-filter: blur(18px); border-left: 1px solid var(--glass-brd);
  transform: translateX(100%); transition: transform .4s cubic-bezier(.2,.8,.2,1); overflow-y: auto; padding: 16px;
}
.menu.open { transform: translateX(0); }
.menu h3 { font-family: var(--font-head); color: var(--gold); font-size: .9rem; margin-bottom: 12px; letter-spacing: 1px; }
.menu-item { padding: 10px 12px; border-radius: 10px; cursor: pointer; color: var(--txt-dim); font-size: .88rem; transition: .2s; border-left: 3px solid transparent; }
.menu-item:hover { background: var(--glass); color: var(--txt); border-left-color: var(--cyan); }
.menu-item.active { color: var(--gold); border-left-color: var(--gold); background: rgba(255,215,0,.06); }
.menu-item .n { font-family: var(--font-head); color: var(--violet-soft); margin-right: 8px; }

/* task slide accents */
.task-badge { display:inline-flex; align-items:center; gap:8px; font-family:var(--font-head); font-size:.8rem; color:#1a1a1a; background: var(--gold); padding:6px 16px; border-radius: 30px; font-weight:700; box-shadow: 0 0 26px rgba(255,215,0,.5); margin-bottom: 14px;}
.checklist { list-style:none; }
.checklist li { padding: 10px 0 10px 36px; position: relative; line-height:1.6; border-bottom: 1px dashed rgba(255,255,255,.08); }
.checklist li::before { content:'☐'; position:absolute; left:6px; color: var(--cyan); font-size:1.2rem; }
.level { display:inline-block; padding:3px 10px; border-radius:6px; font-size:.7rem; font-family:var(--font-head); letter-spacing:1px; }
.level.easy { background: rgba(39,201,63,.18); color:#27c93f;}
.level.mid { background: rgba(255,189,46,.18); color:#ffbd2e;}
.level.hard { background: rgba(255,95,126,.18); color:#ff5f7e;}

.hint-box { margin-top: 14px; }
.hint-box summary { cursor: pointer; color: var(--cyan); font-family: var(--font-head); font-size:.85rem; padding: 8px 0; }
.hint-box[open] summary { color: var(--gold); }

/* fade-in on view */
.reveal { opacity: 0; transform: translateY(24px); transition: .7s; }
.reveal.in { opacity: 1; transform: translateY(0); }

.footer-note { text-align:center; color: var(--txt-dim); font-size:.8rem; margin-top: 30px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.06); }

.badge-row { display:flex; gap:10px; flex-wrap:wrap; margin: 14px 0; }
.badge { font-family:var(--font-head); font-size:.72rem; letter-spacing:1px; padding:6px 14px; border-radius:20px; border:1px solid var(--glass-brd); color:var(--txt-dim); }
.badge.on { color: var(--cyan); border-color: var(--cyan); box-shadow: var(--shadow-cyan); }

/* keyboard hint */
.kbd { display:inline-block; padding:2px 8px; border-radius:6px; background:rgba(255,255,255,.08); border:1px solid var(--glass-brd); font-family:var(--font-head); font-size:.75rem; color:var(--cyan); }

@media (max-width: 1100px) { :root { --slide-max: 960px; } h1.title { font-size: 2.2rem; } }