/* ==========================================================================
   Mul Vidya AI — MCQ to PPT Generator
   Design tokens
   ========================================================================== */
:root{
  /* "Midnight Lecture Hall" — cool violet-white day mode, complementary to the dark flagship theme below */
  --bg:            #F5F5FA;
  --bg-decor-a:    #9C8CF0;
  --bg-decor-b:    #F2A93B;
  --surface:       #FFFFFF;
  --surface-2:     #EEEEF6;
  --border:        #DFDFEE;
  --ink:           #14141F;
  --ink-soft:      #52526C;
  --ink-faint:     #85869E;

  --accent:        #6E5BD6;   /* violet - primary CTA */
  --accent-ink:    #FFFFFF;
  --accent-2:      #C98A2E;   /* amber, deepened for contrast on white */
  --accent-3:      #1E9A90;   /* teal */
  --success:       #1E9E67;

  --shadow-sm:     0 1px 2px rgba(20,20,31,.06), 0 1px 1px rgba(20,20,31,.04);
  --shadow-md:     0 8px 24px rgba(20,20,31,.08), 0 2px 6px rgba(20,20,31,.05);
  --shadow-lg:     0 20px 45px rgba(20,20,31,.14);

  --radius-sm:     10px;
  --radius-md:     16px;
  --radius-lg:     24px;

  --font-display:  'Space Grotesk', 'Noto Sans Bengali', 'Noto Sans Devanagari', 'Segoe UI', sans-serif;
  --font-body:     'Inter', 'Noto Sans Bengali', 'Noto Sans Devanagari', 'Segoe UI', sans-serif;

  color-scheme: light;
}

html[data-theme="dark"]{
  /* Midnight Lecture Hall — near-black indigo, amber + violet duo */
  --bg:            #12131E;
  --bg-decor-a:    #9C8CF0;
  --bg-decor-b:    #F2A93B;
  --surface:       #191A2A;
  --surface-2:     #202134;
  --border:        #2C2E45;
  --ink:           #EDEDF5;
  --ink-soft:      #A6A7BE;
  --ink-faint:     #6E7089;

  --accent:        #F2A93B;   /* amber - primary CTA */
  --accent-ink:    #12131E;
  --accent-2:      #9C8CF0;   /* violet */
  --accent-3:      #5FCFC3;   /* soft teal */
  --success:       #4CC38A;

  --shadow-sm:     0 1px 2px rgba(0,0,0,.35);
  --shadow-md:     0 10px 26px rgba(0,0,0,.45);
  --shadow-lg:     0 24px 50px rgba(0,0,0,.55);

  color-scheme: dark;
}

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

/* Several components below (e.g. .btn, .progress-wrap, .skeleton-strip,
   .bg-mode-controls) set their own `display` property. That has the same
   specificity as the browser's built-in `[hidden]{ display:none }` rule,
   and since these author rules load after the UA stylesheet, they win the
   tie and make the element visible even while `hidden` is set. This keeps
   `hidden` authoritative everywhere, so JS can rely on toggling it. */
[hidden]{ display: none !important; }

html{
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body{
  margin: 0;
  overflow-x: hidden;
  max-width: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

h1, h2, h3{
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0;
}

p{ margin: 0; }

code{
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: .1em .4em;
  border-radius: 6px;
  font-size: .88em;
}

:focus-visible{
  outline: 2.5px solid var(--accent-2);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ambient background blobs, signature brand motif */
.bg-decor{
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.bg-decor::before, .bg-decor::after{
  content:"";
  position: absolute;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .18;
}
.bg-decor::before{
  top: -18vw; right: -14vw;
  background: var(--bg-decor-a);
}
.bg-decor::after{
  bottom: -20vw; left: -16vw;
  background: var(--bg-decor-b);
}
html[data-theme="dark"] .bg-decor::before,
html[data-theme="dark"] .bg-decor::after{ opacity: .14; }

/* ==========================================================================
   Header
   ========================================================================== */
.topbar{
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px) saturate(140%);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  animation: topbarIn .5s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes topbarIn{
  from{ transform: translateY(-14px); opacity: 0; }
  to{ transform: translateY(0); opacity: 1; }
}
.topbar-inner{
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand{ display: flex; align-items: center; gap: 12px; }
.brand-mark{ width: 38px; height: 38px; display: block; flex-shrink: 0; }
.brand-mark svg{ width: 100%; height: 100%; }
.mark-a{ fill: var(--accent-3); }
.mark-b{ fill: var(--accent-2); }
.brand-text{ display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong{ font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; }
.brand-text small{ color: var(--ink-faint); font-size: .74rem; letter-spacing: .02em; }

/* Live animated brand name — slow gradient sweep through the accent palette,
   plus a one-time soft entrance. Subtle and continuous, not flashy. */
.brand-text strong.brand-live{
  position: relative;
  display: inline-block;
  background-image: linear-gradient(
    100deg,
    var(--accent-3) 0%,
    var(--accent) 22%,
    var(--accent-2) 45%,
    var(--accent) 68%,
    var(--accent-3) 90%,
    var(--accent-3) 100%
  );
  background-size: 300% 100%;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: .01em;
  animation:
    brandEnter .7s cubic-bezier(.2,.7,.3,1) both,
    brandShimmer 7s linear .7s infinite;
}

/* faint glow that breathes behind the letters, echoes the header's ambient blobs */
.brand-text strong.brand-live::after{
  content: "Mul Vidya AI";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: inherit;
  background-size: inherit;
  background-position: inherit;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: blur(7px);
  opacity: .45;
  animation: inherit;
}

@keyframes brandShimmer{
  0%{ background-position: 0% 50%; }
  100%{ background-position: 300% 50%; }
}

@keyframes brandEnter{
  from{ opacity: 0; transform: translateY(3px) scale(.98); filter: blur(2px); }
  to{ opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

@media (prefers-reduced-motion: reduce){
  .brand-text strong.brand-live,
  .brand-text strong.brand-live::after{ animation: none; background-position: 30% 50%; }
}

.topbar-actions{ display: flex; align-items: center; gap: 18px; }
.ghost-link{
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .92rem;
  font-weight: 500;
}
.ghost-link:hover{ color: var(--ink); }

/* ---------- Other Features dropdown (Test Series / Exam Series / Test Paper Generator) ---------- */
.feature-menu{ position: relative; }
.feature-menu-btn{
  display: flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(76,110,245,0.35);
  background: rgba(76,110,245,0.08);
  color: #3F5EF0;
  font-size: .88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.feature-menu-btn:hover{ background: rgba(76,110,245,0.16); }
.feature-menu-btn .pencil-icon{
  width: 16px; height: 16px;
  fill: #3F5EF0; stroke: #3F5EF0;
  flex-shrink: 0;
}
.feature-menu-btn .chevron-icon{
  width: 14px; height: 14px;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
  transition: transform .15s;
}
.feature-menu.open .feature-menu-btn .chevron-icon{ transform: rotate(180deg); }

.feature-menu-dropdown{
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: var(--surface, #fff);
  border: 1px solid var(--border, rgba(0,0,0,0.08));
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(20,24,50,0.16);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
  z-index: 60;
}
.feature-menu.open .feature-menu-dropdown{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.feature-menu-item{
  display: block;
  padding: 9px 12px;
  border-radius: 9px;
  color: var(--ink, #1a1a2e);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  white-space: nowrap;
}
.feature-menu-item:hover{ background: rgba(76,110,245,0.1); color: #3F5EF0; }
.feature-menu-new{
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 999px;
  background: #FF7A45;
  color: #fff;
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  vertical-align: middle;
}

@media (max-width: 640px){
  .feature-menu-btn span{ display: none; }
  .feature-menu-btn{ padding: 9px 11px; }
  .feature-menu-dropdown{
    right: 12px;
    left: 12px;
    min-width: 0;
    max-width: none;
    width: auto;
  }
  .feature-menu-item{ white-space: normal; }
}

.theme-toggle{
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--ink);
  position: relative;
  transition: border-color .2s ease, transform .18s cubic-bezier(.2,.8,.3,1.2), box-shadow .2s ease;
}
.theme-toggle:hover{ transform: translateY(-2px) rotate(-8deg); border-color: var(--accent-2); box-shadow: var(--shadow-sm); }
.theme-toggle:active{ transform: translateY(0) scale(.9) rotate(0); transition-duration: .1s; }
@media (prefers-reduced-motion: reduce){
  .theme-toggle{ transition: border-color .2s ease; }
  .theme-toggle:hover{ transform: none; }
}
.theme-toggle svg{ width: 19px; height: 19px; position: absolute; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; transition: opacity .2s ease, transform .3s ease; }
.icon-sun circle{ fill: currentColor; stroke: none; }
.icon-moon{ fill: currentColor; }
html:not([data-theme="dark"]) .icon-moon{ opacity: 0; transform: rotate(-40deg) scale(.5); }
html:not([data-theme="dark"]) .icon-sun{ opacity: 1; transform: rotate(0); }
html[data-theme="dark"] .icon-sun{ opacity: 0; transform: rotate(40deg) scale(.5); }
html[data-theme="dark"] .icon-moon{ opacity: 1; transform: rotate(0); }

.sound-toggle{ margin-left: -4px; }
html[data-sound="off"] .icon-sound-off{ opacity: 1; transform: scale(1); }
html[data-sound="off"] .icon-sound-on{ opacity: 0; transform: scale(.5); }
html:not([data-sound="off"]) .icon-sound-on{ opacity: 1; transform: scale(1); }
html:not([data-sound="off"]) .icon-sound-off{ opacity: 0; transform: scale(.5); }

/* ==========================================================================
   Layout
   ========================================================================== */
.page{
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero{
  padding: 56px 4px 8px;
}
.hero-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.hero-copy{ max-width: 620px; }
.hero-logo{
  display: block;
  width: 112px;
  height: auto;
  margin: 0 0 18px -6px;
  filter: drop-shadow(0 10px 24px rgba(20,20,31,.16));
  animation: heroLogoIn .8s cubic-bezier(.2,.7,.3,1) both, heroLogoFloat 5s ease-in-out .8s infinite;
}
html[data-theme="dark"] .hero-logo{
  filter: drop-shadow(0 10px 28px rgba(0,0,0,.5));
}
@keyframes heroLogoIn{
  from{ opacity: 0; transform: translateY(10px) scale(.92); }
  to{ opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes heroLogoFloat{
  0%, 100%{ transform: translateY(0); }
  50%{ transform: translateY(-6px); }
}
@media (prefers-reduced-motion: reduce){
  .hero-logo{ animation: none; }
}
.eyebrow{
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.hero h1{
  font-size: clamp(1.9rem, 4.2vw, 2.7rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.15;
  margin-bottom: 14px;
}
.hero p{
  color: var(--ink-soft);
  font-size: 1.06rem;
  max-width: 60ch;
}
.hero strong{ color: var(--ink); }

/* ---- Hero visual: premium interactive 3D signature scene ---- */
.hero-visual.hvsig{
  position: relative;
  width: 360px;
  aspect-ratio: 4/3;
  flex-shrink: 0;
  perspective: 1600px;
}

/* ambient color atmosphere, independent of the tilt scene */
.hvsig-orb{
  position: absolute;
  border-radius: 50%;
  filter: blur(26px);
  opacity: .5;
  z-index: 0;
  animation: hvsigDrift 9s ease-in-out infinite;
}
.hvsig-orb.orb-a{ width: 140px; height: 140px; background: var(--accent); top: -28px; left: -30px; }
.hvsig-orb.orb-b{ width: 104px; height: 104px; background: var(--accent-2); bottom: -18px; right: -20px; animation-delay: 1.6s; }
.hvsig-orb.orb-c{ width: 80px;  height: 80px;  background: var(--accent-3); bottom: 30%; left: -36px; animation-delay: 3s; }
html[data-theme="dark"] .hvsig-orb{ opacity: .65; }

/* the whole composition lives in this one 3D plane — either it gently
   sways on its own, or (desktop, fine pointer) it tracks the cursor */
.hvsig-field{
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  animation: hvsigFieldSway 11s ease-in-out infinite;
  will-change: transform;
}
.hero-visual.hvsig.is-live .hvsig-field{ animation: none; }

/* glowing glass plaque behind the signature */
.hvsig-plate{
  position: absolute;
  inset: 10% 4%;
  transform: translateZ(4px);
}
.hvsig-plate-glow{
  position: absolute;
  inset: -22%;
  border-radius: 34px;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-3), var(--accent-2), var(--accent));
  filter: blur(28px);
  opacity: .38;
  animation: hvsigPlateSpin 9s linear infinite;
}
.hvsig-plate-glass{
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255,255,255,.55), rgba(255,255,255,.06));
  border: 1px solid rgba(255,255,255,.55);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,.6);
  backdrop-filter: blur(6px);
}
html[data-theme="dark"] .hvsig-plate-glass{
  background: linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.02));
  border-color: rgba(255,255,255,.14);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,.08);
}

.hvsig-stage{
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 1;
  transform-style: preserve-3d;
}

.hvsig-imgwrap{
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 300px;
  transform: translateZ(46px);
  animation: hvsigFloat 5s ease-in-out infinite;
  will-change: transform;
}

.hvsig-img{
  display: block;
  width: 100%;
  filter:
    drop-shadow(0 2px 0 rgba(0,0,0,.18))
    drop-shadow(0 16px 26px rgba(20,20,40,.3))
    drop-shadow(0 2px 12px var(--accent-2));
}
html[data-theme="dark"] .hvsig-img{
  filter:
    drop-shadow(0 2px 0 rgba(0,0,0,.5))
    drop-shadow(0 18px 30px rgba(0,0,0,.6))
    drop-shadow(0 2px 16px var(--accent));
}

/* mirrored, fading reflection under the signature — grounds it in the scene */
.hvsig-reflection{
  position: absolute;
  left: 0;
  top: 100%;
  width: 100%;
  transform: scaleY(-1);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.35), transparent 65%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.35), transparent 65%);
  opacity: .45;
  pointer-events: none;
}

/* diagonal light sweep across the signature */
.hvsig-sheen{
  position: absolute;
  inset: -20% -50%;
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,.6) 50%, transparent 60%);
  mix-blend-mode: overlay;
  transform: translateX(-130%);
  animation: hvsigSheen 4.5s ease-in-out infinite;
  pointer-events: none;
}
html[data-theme="dark"] .hvsig-sheen{
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,.3) 50%, transparent 60%);
}

/* twinkling motes scattered around the signature */
.hvsig-sparkle{
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0%, rgba(255,255,255,0) 72%);
  opacity: 0;
  transform: translateZ(60px) scale(.4);
  animation: hvsigTwinkle 3.2s ease-in-out infinite;
  pointer-events: none;
}
.hvsig-sparkle.s1{ top: 12%;  left: 14%; box-shadow: 0 0 10px 2px var(--accent);   animation-delay: .1s; }
.hvsig-sparkle.s2{ top: 66%;  left: 6%;  box-shadow: 0 0 10px 2px var(--accent-3); animation-delay: 1.1s; width: 5px; height: 5px; }
.hvsig-sparkle.s3{ top: 20%;  left: 84%; box-shadow: 0 0 12px 3px var(--accent-2); animation-delay: 2s; }
.hvsig-sparkle.s4{ top: 78%;  left: 70%; box-shadow: 0 0 9px 2px var(--accent);    animation-delay: .7s; width: 4px; height: 4px; }
.hvsig-sparkle.s5{ top: 46%;  left: 92%; box-shadow: 0 0 10px 2px var(--accent-3); animation-delay: 2.6s; }

.hvsig-chip{
  position: absolute;
  z-index: 3;
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  font: 700 .68rem var(--font-display);
  animation: hvsigChipFloat 5s ease-in-out infinite;
}
.hvsig-chip-pptx{ top: 10px; right: 2px; padding: 6px 12px; background: var(--accent-2); color: #fff; --z: 64px; animation-delay: .3s; }
.hvsig-chip-check{ bottom: 24px; left: -6px; width: 34px; height: 34px; background: var(--success); color: #fff; --z: 56px; animation-delay: 1.1s; }
.hvsig-chip-check svg{ width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

/* breathing contact shadow — sells the lift on float */
.hvsig-shadow{
  position: absolute;
  left: 50%;
  bottom: 2%;
  width: 58%;
  height: 20px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(10,10,30,.4), transparent 72%);
  filter: blur(6px);
  animation: hvsigShadowPulse 5s ease-in-out infinite;
}
html[data-theme="dark"] .hvsig-shadow{ background: radial-gradient(ellipse at center, rgba(0,0,0,.6), transparent 72%); }

/* cursor-follow glass highlight, only active while the scene is "live" */
.hvsig-spotlight{
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  transform: translateZ(80px);
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,.55), transparent 42%);
  mix-blend-mode: overlay;
  opacity: 0;
  transition: opacity .4s ease;
}
.hero-visual.hvsig.is-live .hvsig-spotlight{ opacity: 1; }
html[data-theme="dark"] .hvsig-spotlight{
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,.3), transparent 42%);
}

@keyframes hvsigDrift{
  0%, 100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(8px,-10px) scale(1.08); }
}
@keyframes hvsigFieldSway{
  0%, 100%{ transform: rotateX(5deg) rotateY(-7deg); }
  50%{ transform: rotateX(-3deg) rotateY(6deg); }
}
@keyframes hvsigPlateSpin{ to{ transform: rotate(360deg); } }
@keyframes hvsigFloat{
  0%, 100%{ transform: translateZ(46px) translateY(0) rotate(-1.5deg); }
  50%{ transform: translateZ(46px) translateY(-13px) rotate(1.5deg); }
}
@keyframes hvsigSheen{
  0%, 20%{ transform: translateX(-130%); }
  55%, 100%{ transform: translateX(130%); }
}
@keyframes hvsigTwinkle{
  0%, 100%{ opacity: 0; transform: translateZ(60px) scale(.4); }
  50%{ opacity: 1; transform: translateZ(60px) scale(1); }
}
@keyframes hvsigChipFloat{
  0%, 100%{ transform: translateZ(var(--z,60px)) translateY(0); }
  50%{ transform: translateZ(var(--z,60px)) translateY(-7px); }
}
@keyframes hvsigShadowPulse{
  0%, 100%{ transform: translateX(-50%) scale(1); opacity: .55; }
  50%{ transform: translateX(-50%) scale(.8); opacity: .28; }
}
@media (prefers-reduced-motion: reduce){
  .hvsig-orb, .hvsig-field, .hvsig-plate-glow, .hvsig-imgwrap, .hvsig-sheen,
  .hvsig-sparkle, .hvsig-chip, .hvsig-shadow{ animation: none; }
}
@media (max-width: 860px){
  .hero-inner{ flex-direction: column; align-items: flex-start; }
  .hero-visual.hvsig{ width: 100%; max-width: 360px; align-self: center; }
}

/* ---- Consistent step-header icon set ---- */
.step-head h2{ display: flex; align-items: center; gap: 10px; }
.step-icon{
  width: 22px; height: 22px;
  flex-shrink: 0;
  color: var(--accent);
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Scroll-reveal (progressive enhancement — JS adds .reveal, then .revealed) ---- */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1);
}
.reveal.revealed{ opacity: 1; transform: translateY(0); }

.how-steps li{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}
.how-steps.revealed li{ opacity: 1; transform: translateY(0); }
.how-steps.revealed li:nth-child(1){ transition-delay: .05s; }
.how-steps.revealed li:nth-child(2){ transition-delay: .15s; }
.how-steps.revealed li:nth-child(3){ transition-delay: .25s; }
.how-steps.revealed li:nth-child(4){ transition-delay: .35s; }

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.step-head{
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.step-num{
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .92rem;
}
.step-head h2{ font-size: 1.28rem; font-weight: 600; margin-bottom: 4px; }
.step-sub{ color: var(--ink-soft); font-size: .93rem; max-width: 56ch; }
.q-count{
  margin-left: auto;
  align-self: center;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 13%, transparent);
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ==========================================================================
   Step 1 — Textarea
   ========================================================================== */
.mcq-textarea{
  width: 100%;
  min-height: 260px;
  resize: vertical;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, 'Noto Sans Bengali', 'Noto Sans Devanagari', monospace;
  font-size: .93rem;
  line-height: 1.65;
  color: var(--ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.mcq-textarea::placeholder{ color: var(--ink-faint); }
.mcq-textarea:focus{
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-2) 20%, transparent);
  outline: none;
}

.step-footer{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.parse-warning{
  font-size: .84rem;
  color: #B5532B;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
}
html[data-theme="dark"] .parse-warning{ color: #FFB98A; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .92rem;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform .18s cubic-bezier(.2,.8,.3,1.2), box-shadow .2s ease, opacity .2s ease, background .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 32%, rgba(255,255,255,.4) 50%, transparent 68%);
  transform: translateX(-130%);
  transition: transform .6s ease;
  pointer-events: none;
}
.btn:hover:not(:disabled)::after{ transform: translateX(130%); }
.btn:hover:not(:disabled){ transform: translateY(-2px); }
.btn:active:not(:disabled){ transform: translateY(0) scale(.95); transition-duration: .1s; }
.btn svg{ width: 17px; height: 17px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: transform .2s ease; }
.btn:hover:not(:disabled) svg{ transform: translateX(2px); }
.btn:active:not(:disabled) svg{ transform: translateX(0) scale(.92); }
.btn:disabled{ opacity: .45; cursor: not-allowed; transform: none; }
@media (prefers-reduced-motion: reduce){
  .btn, .btn::after, .btn svg{ transition: none !important; }
  .btn:hover:not(:disabled){ transform: none; }
}

.btn-ghost{
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--ink-soft);
}
.btn-ghost:hover:not(:disabled){ color: var(--ink); border-color: var(--ink-faint); box-shadow: var(--shadow-sm); }
.btn-ghost.speaking{ background: color-mix(in srgb, var(--accent) 14%, var(--surface-2)); border-color: var(--accent); color: var(--accent); animation: speakPulse 1.4s ease infinite; }

.btn-primary{
  background: var(--accent);
  color: var(--accent-ink);
  padding: 13px 26px;
  font-size: .96rem;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover:not(:disabled){ box-shadow: var(--shadow-lg); }

.btn-success{
  background: var(--success);
  color: #fff;
  padding: 13px 26px;
  font-size: .96rem;
  box-shadow: var(--shadow-md);
}
.btn-success:hover:not(:disabled){ box-shadow: var(--shadow-lg); }

/* ==========================================================================
   Step 2 — Template gallery
   ========================================================================== */
.template-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.template-card{
  position: relative;
  border-radius: var(--radius-md);
  border: 2.5px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  overflow: hidden;
  padding: 0;
  text-align: left;
  transition: border-color .2s ease, transform .15s ease, box-shadow .2s ease;
  animation: cardIn .4s ease both;
  animation-delay: calc(var(--i, 0) * 55ms);
}
@keyframes cardIn{
  from{ opacity: 0; transform: translateY(10px); }
  to{ opacity: 1; transform: translateY(0); }
}
.template-card:hover{ transform: translateY(-2px); box-shadow: var(--shadow-md); }
.template-thumb{ transition: transform .35s ease; }
.template-card:hover .template-thumb{ transform: scale(1.045); }
.template-card.selected{
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-2) 22%, transparent);
}

.template-thumb{
  position: relative;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
}
/* mocked slide overlay preview, mirrors real pptx placeholder geometry */
.thumb-mock{ position: absolute; inset: 0; }
.thumb-mock .m-badge{
  position: absolute; left: 6%; top: 8%; width: 34%; height: 11%;
  border-radius: 999px; background: rgba(255,255,255,.92);
  display: flex; align-items: center; padding-left: 8%;
}
.thumb-mock .m-badge i{ width: 30%; height: 55%; border-radius: 3px; background: var(--tpl-accent, #FF7A45); }
.thumb-mock .m-question{
  position: absolute; left: 6%; top: 21%; width: 88%; height: 20%;
  border-radius: 8px; background: rgba(255,255,255,.92);
}
.thumb-mock .m-opt{
  position: absolute; width: 42%; height: 19%;
  border-radius: 8px; background: rgba(255,255,255,.88);
}
.thumb-mock .m-opt.o-a{ left: 6%;  top: 46%; }
.thumb-mock .m-opt.o-b{ left: 52%; top: 46%; }
.thumb-mock .m-opt.o-c{ left: 6%;  top: 69%; }
.thumb-mock .m-opt.o-d{ left: 52%; top: 69%; }

.template-check{
  position: absolute; top: 9px; right: 9px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent-2);
  display: grid; place-items: center;
  opacity: 0; transform: scale(.6);
  transition: opacity .15s ease, transform .15s ease;
}
.template-card.selected .template-check{ opacity: 1; transform: scale(1); }
.template-check svg{ width: 14px; height: 14px; stroke: #fff; stroke-width: 3; fill: none; }

.template-label{
  padding: 10px 14px 14px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--ink);
}
.template-label small{ display: block; font-weight: 400; color: var(--ink-faint); font-size: .76rem; margin-top: 2px; }

.slide-preview-block{ margin: 2px 0 20px; }
.slide-preview-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.slide-preview-label{
  font-size: .78rem;
  font-weight: 700;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.slide-preview-count{ font-size: .78rem; color: var(--ink-faint); }
.slide-preview-strip{
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x proximity;
}
.slide-preview-strip::-webkit-scrollbar{ height: 6px; }
.slide-preview-strip::-webkit-scrollbar-thumb{ background: var(--border); border-radius: 999px; }
.preview-slide{
  flex: 0 0 124px;
  aspect-ratio: 16/9;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  overflow: hidden;
  scroll-snap-align: start;
  transition: transform .15s ease, border-color .15s ease;
  animation: qrowIn .25s ease both;
  /* Defaults — overridden per-card via inline style in renderSlidePreview()
     so the strip reflects the accent / text / fill / font / card-style /
     shadow controls live, instead of always showing flat white boxes. */
  --ps-fill: rgba(255,255,255,.9);
  --ps-ink: #16213A;
  --ps-accent: #FF7A45;
  --ps-radius: 4px;
  --ps-shadow: none;
  --ps-font: Arial, sans-serif;
  --ps-border: 1px solid rgba(22,33,58,.14);
}
.preview-slide:hover{ transform: translateY(-3px); border-color: var(--accent-2); }
.preview-slide .ps-num{
  position: absolute; left: 5%; top: 8%;
  width: 15%; aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(255,255,255,.92);
  color: var(--ps-accent);
  font-size: 7px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: inset 0 0 0 1.4px var(--ps-accent);
}
.preview-slide .ps-q{
  position: absolute; left: 5%; top: 24%;
  width: 90%; height: 22%;
  border-radius: var(--ps-radius);
  background: var(--ps-fill);
  box-shadow: var(--ps-shadow);
  border: var(--ps-border);
  border-left: 2px solid var(--ps-accent);
}
.preview-slide .ps-opt{
  position: absolute;
  width: 42%; height: 16%;
  border-radius: var(--ps-radius);
  background: var(--ps-fill);
  box-shadow: var(--ps-shadow);
  border: var(--ps-border);
}
.preview-slide .ps-q::before,
.preview-slide .ps-opt::before{
  content: 'Aa';
  position: absolute;
  left: 7%; top: 8%;
  font-family: var(--ps-font);
  color: var(--ps-ink);
  font-weight: 700;
  line-height: 1;
}
.preview-slide .ps-q::before{ font-size: 8px; }
.preview-slide .ps-opt::before{ font-size: 6px; }
.preview-slide .ps-opt.o-a{ left: 5%;  top: 52%; }
.preview-slide .ps-opt.o-b{ left: 53%; top: 52%; }
.preview-slide .ps-opt.o-c{ left: 5%;  top: 72%; }
.preview-slide .ps-opt.o-d{ left: 53%; top: 72%; }

/* Compact layout preview — mirrors LAYOUT.variants.compact geometry */
.preview-slide.layout-compact .ps-q{ top: 15%; height: 16%; }
.preview-slide.layout-compact .ps-opt{ height: 17%; }
.preview-slide.layout-compact .ps-opt.o-a,
.preview-slide.layout-compact .ps-opt.o-b{ top: 33%; }
.preview-slide.layout-compact .ps-opt.o-c,
.preview-slide.layout-compact .ps-opt.o-d{ top: 52%; }

/* Stacked layout preview — mirrors LAYOUT.variants.stacked geometry */
.preview-slide.layout-stacked .ps-q{ top: 13%; height: 16%; }
.preview-slide.layout-stacked .ps-opt{ width: 90%; height: 12%; }
.preview-slide.layout-stacked .ps-opt.o-a{ left: 5%; top: 33%; }
.preview-slide.layout-stacked .ps-opt.o-b{ left: 5%; top: 47%; }
.preview-slide.layout-stacked .ps-opt.o-c{ left: 5%; top: 61%; }
.preview-slide.layout-stacked .ps-opt.o-d{ left: 5%; top: 75%; }

/* Spacious layout preview — same grid as default, more gap between boxes */
.preview-slide.layout-spacious .ps-q{ top: 20%; height: 18%; }
.preview-slide.layout-spacious .ps-opt{ width: 40%; height: 15%; }
.preview-slide.layout-spacious .ps-opt.o-a,
.preview-slide.layout-spacious .ps-opt.o-b{ top: 45%; }
.preview-slide.layout-spacious .ps-opt.o-c,
.preview-slide.layout-spacious .ps-opt.o-d{ top: 73%; }

/* Single row layout preview — mirrors LAYOUT.variants.row geometry */
.preview-slide.layout-row .ps-q{ top: 12%; height: 26%; }
.preview-slide.layout-row .ps-opt{ width: 21%; height: 32%; top: 60%; }
.preview-slide.layout-row .ps-opt.o-a{ left: 3%; }
.preview-slide.layout-row .ps-opt.o-b{ left: 27%; }
.preview-slide.layout-row .ps-opt.o-c{ left: 51%; }
.preview-slide.layout-row .ps-opt.o-d{ left: 75%; }

/* Big options layout preview — mirrors LAYOUT.variants.bigOptions geometry */
.preview-slide.layout-bigOptions .ps-q{ top: 10%; height: 12%; }
.preview-slide.layout-bigOptions .ps-opt{ height: 26%; }
.preview-slide.layout-bigOptions .ps-opt.o-a,
.preview-slide.layout-bigOptions .ps-opt.o-b{ top: 26%; }
.preview-slide.layout-bigOptions .ps-opt.o-c,
.preview-slide.layout-bigOptions .ps-opt.o-d{ top: 56%; }

/* Centered layout preview — mirrors LAYOUT.variants.centered geometry */
.preview-slide.layout-centered .ps-q{ left: 20%; width: 60%; top: 16%; height: 16%; }
.preview-slide.layout-centered .ps-opt{ left: 25%; width: 50%; height: 11%; }
.preview-slide.layout-centered .ps-opt.o-a{ top: 36%; }
.preview-slide.layout-centered .ps-opt.o-b{ top: 50%; left: 25%; }
.preview-slide.layout-centered .ps-opt.o-c{ top: 64%; }
.preview-slide.layout-centered .ps-opt.o-d{ top: 78%; left: 25%; }

.preview-slide-more{
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  color: var(--ink-soft);
  font-weight: 700;
  font-size: .82rem;
}

/* ---------- live PDF worksheet preview (real page thumbnails) ----------
   Each .pdf-preview-page is now a <canvas> rasterized by pdf.js straight
   from the actual generated PDF (see UI.renderPdfPreviewNow in script.js)
   — pixel-accurate to the real download, not a hand-drawn approximation. */
.pdf-preview-page{
  flex: 0 0 84px;
  width: 84px;
  aspect-ratio: 595/842;
  height: auto;
  border-radius: 5px;
  border: 1.5px solid var(--border);
  background: #fff;
  display: block;
  object-fit: contain;
  position: relative;
  overflow: hidden;
  scroll-snap-align: start;
  transition: transform .15s ease, border-color .15s ease, opacity .15s ease;
  animation: qrowIn .25s ease both;
}
.pdf-preview-page:hover{ transform: translateY(-3px); border-color: var(--accent-2); }

.pdf-preview-more{
  flex: 0 0 84px;
  aspect-ratio: 595/842;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  color: var(--ink-soft);
  font-weight: 700;
  font-size: .82rem;
  scroll-snap-align: start;
}

/* Brief "regenerating" state while a debounced re-render (real PDF build +
   pdf.js rasterization) is in flight after a design tweak — keeps the old
   thumbnails visible but dimmed instead of flashing to empty. */
.slide-preview-strip.is-updating .pdf-preview-page,
.slide-preview-strip.is-updating .pdf-preview-more{
  opacity: .45;
}


.upload-tile{
  display: flex;
  align-items: center;
  gap: 14px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  cursor: pointer;
  color: var(--ink-soft);
  transition: border-color .2s ease, background .2s ease;
}
.upload-tile:hover{ border-color: var(--accent-2); background: var(--surface-2); }
.upload-icon{ width: 26px; height: 26px; stroke: var(--accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.upload-tile span{ font-size: .87rem; line-height: 1.4; }
.upload-tile strong{ color: var(--ink); }

/* ==========================================================================
   Step 3 — Generate
   ========================================================================== */
.generate-row{
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.progress-wrap{
  flex: 1;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.progress-track{
  height: 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow: hidden;
}
.progress-fill{
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background-image:
    repeating-linear-gradient(45deg, rgba(255,255,255,.28) 0 9px, transparent 9px 18px),
    linear-gradient(90deg, var(--accent-3), var(--accent));
  background-size: 26px 26px, 100% 100%;
  transition: width .2s ease;
  animation: progressStripes 1s linear infinite;
}
@keyframes progressStripes{
  from{ background-position: 0 0, 0 0; }
  to{ background-position: 52px 0, 0 0; }
}
.progress-label{ font-size: .8rem; color: var(--ink-soft); }

/* ---- Small feedback animations: count bump, button-ready pulse, pop-in ---- */
@keyframes bumpPulse{
  0%{ transform: scale(1); }
  45%{ transform: scale(1.14); }
  100%{ transform: scale(1); }
}
.q-count.bump{ animation: bumpPulse .32s ease; }

@keyframes btnPulseGlow{
  0%{ box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent); }
  70%{ box-shadow: 0 0 0 14px color-mix(in srgb, var(--accent) 0%, transparent); }
  100%{ box-shadow: 0 0 0 0 transparent; }
}
.btn-pulse{ animation: btnPulseGlow .8s ease-out; }

@keyframes popIn{
  0%{ opacity: 0; transform: scale(.85) translateY(6px); }
  60%{ opacity: 1; transform: scale(1.03) translateY(0); }
  100%{ opacity: 1; transform: scale(1) translateY(0); }
}
.pop-in{ animation: popIn .38s cubic-bezier(.2,.8,.3,1.2); }

.skeleton-strip{
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.skeleton-slide{
  flex: 1;
  aspect-ratio: 16/9;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--border) 37%, var(--surface-2) 63%);
  background-size: 400% 100%;
  animation: skeletonShimmer 1.4s ease infinite;
}
.skeleton-slide:nth-child(2){ animation-delay: .12s; }
.skeleton-slide:nth-child(3){ animation-delay: .24s; }
.skeleton-slide:nth-child(4){ animation-delay: .36s; }
@keyframes skeletonShimmer{
  0%{ background-position: 100% 0; }
  100%{ background-position: 0 0; }
}
@media (max-width: 640px){
  .skeleton-strip{ display: none; }
}

.generate-hint{
  margin-top: 14px;
  font-size: .84rem;
  color: var(--ink-faint);
}

/* ==========================================================================
   How it works
   ========================================================================== */
.how{ padding: 12px 4px 0; }
.how h2{ font-size: 1.3rem; font-weight: 600; margin-bottom: 18px; }
.how-steps{
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.how-steps li{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  font-size: .89rem;
  color: var(--ink-soft);
  line-height: 1.55;
}
.how-num{
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--accent-2);
  margin-bottom: 8px;
}

/* ==========================================================================
   Footer & toast
   ========================================================================== */
.site-footer{
  text-align: center;
  padding: 30px 24px 50px;
  color: var(--ink-faint);
  font-size: .82rem;
}

.toast{
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: var(--bg);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: .87rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s cubic-bezier(.3,1.4,.4,1), transform .3s cubic-bezier(.3,1.4,.4,1);
  z-index: 50;
  max-width: 90vw;
}
.toast.show{ opacity: 1; transform: translateX(-50%) translateY(0); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 640px){
  .topbar-inner{ padding: 12px 16px; }
  .page{ padding: 0 16px 60px; gap: 20px; }
  .hero{ padding: 34px 0 4px; }
  .card{ padding: 20px; border-radius: var(--radius-md); }
  .q-count{ margin-left: 0; }
  .ghost-link{ display: none; }
  .generate-row{ flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-success{ width: 100%; justify-content: center; }
  .progress-wrap{ order: 3; width: 100%; }
}

@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ==========================================================================
   Step 2 — Review & edit table
   ========================================================================== */
.review-table{
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 560px;
  overflow-y: auto;
  padding-right: 4px;
  margin-bottom: 6px;
}
.review-empty{
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  padding: 38px 20px 32px;
  color: var(--ink-faint);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}
.review-empty-icon{
  width: 40px; height: 40px;
  stroke: var(--ink-faint);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: .7;
  margin-bottom: 8px;
}
.review-empty-title{ font-family: var(--font-display); font-weight: 600; font-size: 1rem; color: var(--ink); }
.review-empty-sub{ font-size: .86rem; max-width: 40ch; }
.review-empty-actions{ display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; justify-content: center; }

.qrow{
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  animation: qrowIn .28s ease both;
}
.qrow.qrow-removing{
  transition: opacity .2s ease, transform .2s ease;
  opacity: 0;
  transform: translateX(14px) scale(.98);
  pointer-events: none;
}
@keyframes qrowIn{
  from{ opacity: 0; transform: translateY(6px); }
  to{ opacity: 1; transform: translateY(0); }
}
.qrow-head{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.qrow-num{
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  font-size: .74rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.qrow-type{
  font-size: .72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent-2) 16%, transparent);
  color: var(--ink-soft);
  white-space: nowrap;
}
.qrow-type.type-tf{ background: color-mix(in srgb, var(--accent-3) 22%, transparent); }
.qrow-type.type-blank{ background: color-mix(in srgb, var(--accent) 16%, transparent); }
.qrow-spacer{ flex: 1; }

.icon-btn{
  width: 28px; height: 28px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-soft);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color .15s ease, color .15s ease, transform .15s cubic-bezier(.2,.8,.3,1.2), box-shadow .15s ease;
}
.icon-btn svg{ width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2.3; stroke-linecap: round; stroke-linejoin: round; transition: transform .15s ease; }
.icon-btn:hover:not(:disabled){ border-color: var(--accent-2); color: var(--ink); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.icon-btn:active:not(:disabled){ transform: translateY(0) scale(.88); transition-duration: .1s; }
@media (prefers-reduced-motion: reduce){
  .icon-btn{ transition: border-color .15s ease, color .15s ease; }
  .icon-btn:hover:not(:disabled){ transform: none; }
}
.icon-btn:disabled{ opacity: .35; cursor: not-allowed; }
.icon-btn.danger:hover{ border-color: #E0555A; color: #E0555A; }
.icon-btn.speaking{ border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--surface)); animation: speakPulse 1.4s ease infinite; }
@keyframes speakPulse{
  0%, 100%{ box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 35%, transparent); }
  50%{ box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 0%, transparent); }
}

.qrow-question{
  width: 100%;
  resize: vertical;
  min-height: 44px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-family: var(--font-body);
  font-size: .89rem;
  color: var(--ink);
  margin-bottom: 8px;
}
.qrow-question:focus{ border-color: var(--accent-2); outline: none; }

.qopt-list{ display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.qopt-list.qopt-tf{ grid-template-columns: 1fr 1fr; }
.qopt-row{
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
}
.qopt-row input[type="radio"]{ accent-color: var(--accent); flex-shrink: 0; }
.qopt-letter{
  font-size: .74rem;
  font-weight: 700;
  color: var(--ink-faint);
  width: 16px;
  flex-shrink: 0;
}
.qopt-input{
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-size: .87rem;
  color: var(--ink);
  font-family: var(--font-body);
}
.qopt-input:focus{ outline: none; }
.qopt-static{ font-size: .87rem; color: var(--ink); }
.qopt-blank-row{ grid-column: 1 / -1; }

@media (max-width: 560px){
  .qopt-list{ grid-template-columns: 1fr; }
}

/* ==========================================================================
   Step 3 extras — template tools, accent picker, cover fields
   ========================================================================== */
.template-tools{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}
@media (max-width: 640px){ .template-tools{ grid-template-columns: 1fr; } }

.accent-tile{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}
.accent-tile label{ font-size: .87rem; color: var(--ink-soft); line-height: 1.4; }
.accent-tile strong{ color: var(--ink); }
.accent-controls{ display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.accent-controls input[type="color"]{
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: none;
  cursor: pointer;
  padding: 2px;
}
.btn-sm{ padding: 7px 12px; font-size: .78rem; }

.cover-fields{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
@media (max-width: 640px){ .cover-fields{ grid-template-columns: 1fr; } }

.field{ display: flex; flex-direction: column; gap: 6px; }
.field label{ font-size: .82rem; font-weight: 600; color: var(--ink-soft); }
.field input[type="text"]{
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: .9rem;
  color: var(--ink);
  font-family: var(--font-body);
}
.field input[type="text"]:focus{ border-color: var(--accent-2); outline: none; }

.check-field{
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: .87rem;
  color: var(--ink-soft);
  cursor: pointer;
}
.check-field input{ accent-color: var(--accent); width: 17px; height: 17px; }

/* ==========================================================================
   Switch field — pill on/off toggle (used for the watermark control)
   ========================================================================== */
.switch-field{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
  cursor: pointer;
}
.switch-field-text{ display: flex; flex-direction: column; gap: 2px; }
.switch-field-text strong{ font-size: .92rem; color: var(--ink); font-family: var(--font-display); }
.switch-field-text small{ font-size: .78rem; color: var(--ink-faint); line-height: 1.4; }

.switch{ position: relative; flex: none; display: inline-flex; }
.switch input{
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.switch-track{
  width: 46px;
  height: 26px;
  background: var(--border);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  padding: 3px;
  transition: background .18s ease;
}
.switch-thumb{
  width: 20px;
  height: 20px;
  background: var(--surface);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transform: translateX(0);
  transition: transform .32s cubic-bezier(.34,1.56,.64,1);
}
.switch input:checked + .switch-track{ background: var(--accent); }
.switch input:checked + .switch-track .switch-thumb{ transform: translateX(20px); }
.switch input:focus-visible + .switch-track{ outline: 2px solid var(--accent-2); outline-offset: 2px; }

/* Output format toggle — PPT vs PDF, used in step 4 to show one generator at a time */
.output-switch-control{ display: flex; align-items: center; gap: 10px; flex: none; }
.output-switch-label{
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--ink-faint);
  font-family: var(--font-display);
  transition: color .15s ease;
}
.output-switch-label.active{ color: var(--accent); }

/* ==========================================================================
   Format fields — font, card style, layout, shadows, slide background
   ========================================================================== */
.format-fields{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 20px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
@media (max-width: 640px){ .format-fields{ grid-template-columns: 1fr; } }

.field select{
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: .9rem;
  color: var(--ink);
  font-family: var(--font-body);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235B6478' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
  padding-right: 34px;
}
.field select:focus{ border-color: var(--accent-2); outline: none; }
.field-note{ font-size: .76rem; color: var(--ink-faint); line-height: 1.4; }

.seg-group{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px;
}
.seg-btn{
  flex: 1 1 auto;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: .84rem;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}
.seg-btn:hover{ color: var(--ink); }
.seg-btn.active{
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.bg-mode-field{ grid-column: 1 / -1; }
.bg-mode-controls{
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}
.bg-mode-controls label{
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.bg-mode-controls input[type="color"]{
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: none;
  cursor: pointer;
  padding: 2px;
}

/* ==========================================================================
   About Me card — animated signature intro + CTA to personal site
   ========================================================================== */
.about-me{
  position: relative;
  overflow: hidden;
  margin: 22px 0 34px;
  opacity: 0;
  transform: translateY(16px);
  animation: abmeIn .7s cubic-bezier(.2,.7,.3,1) .15s both;
}
@keyframes abmeIn{
  from{ opacity: 0; transform: translateY(16px); }
  to{ opacity: 1; transform: translateY(0); }
}

.abme-decor{ position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.abme-orb{
  position: absolute;
  border-radius: 50%;
  filter: blur(28px);
  opacity: .35;
  animation: abmeDrift 10s ease-in-out infinite;
}
.abme-orb-a{ width: 150px; height: 150px; background: var(--accent);   top: -50px;  left: -40px; }
.abme-orb-b{ width: 120px; height: 120px; background: var(--accent-2); bottom: -46px; right: -30px; animation-delay: 1.8s; }
.abme-orb-c{ width: 90px;  height: 90px;  background: var(--accent-3); top: 30%;    right: 18%;  animation-delay: 3.4s; }
html[data-theme="dark"] .abme-orb{ opacity: .5; }
@keyframes abmeDrift{
  0%, 100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(10px,-14px) scale(1.08); }
}

.abme-sparkle{
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: abmeTwinkle 3.4s ease-in-out infinite;
}
.abme-sparkle.s1{ top: 16%; left: 22%; box-shadow: 0 0 10px 2px var(--accent);   animation-delay: .2s; }
.abme-sparkle.s2{ top: 70%; left: 40%; box-shadow: 0 0 9px 2px var(--accent-3);  animation-delay: 1.4s; width: 4px; height: 4px; }
.abme-sparkle.s3{ top: 34%; left: 78%; box-shadow: 0 0 11px 2px var(--accent-2); animation-delay: 2.3s; }
@keyframes abmeTwinkle{
  0%, 100%{ opacity: 0; transform: scale(.5); }
  50%{ opacity: 1; transform: scale(1.15); }
}

.abme-inner{
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 30px;
}
.abme-sigwrap{
  position: relative;
  flex-shrink: 0;
  width: 128px;
  height: 128px;
  display: grid;
  place-items: center;
}
.abme-sig-ring{
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1.5px dashed var(--border);
  animation: abmeRingSpin 16s linear infinite;
}
@keyframes abmeRingSpin{ to{ transform: rotate(360deg); } }
.abme-sig{
  position: relative;
  width: 84%;
  height: auto;
  filter: drop-shadow(0 6px 14px rgba(20,20,31,.14));
  animation: abmeSigFloat 5s ease-in-out infinite;
}
html[data-theme="dark"] .abme-sig{ filter: drop-shadow(0 6px 16px rgba(0,0,0,.5)) invert(1) brightness(1.4); }
@keyframes abmeSigFloat{
  0%, 100%{ transform: translateY(0) rotate(-2deg); }
  50%{ transform: translateY(-6px) rotate(1deg); }
}
.abme-sig-sheen{
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,.5) 50%, transparent 60%);
  transform: translateX(-120%);
  animation: abmeSheen 4.5s ease-in-out infinite;
  mix-blend-mode: overlay;
}
@keyframes abmeSheen{
  0%, 60%, 100%{ transform: translateX(-120%); }
  80%{ transform: translateX(120%); }
}

.abme-copy{ flex: 1; min-width: 0; }
.abme-copy h2{ font-size: 1.32rem; font-weight: 700; margin: 6px 0 8px; }
.abme-copy p{ color: var(--ink-soft); font-size: .96rem; max-width: 58ch; margin-bottom: 18px; }

.abme-link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .92rem;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: transform .18s cubic-bezier(.2,.8,.3,1.2), box-shadow .2s ease;
}
.abme-link-glow{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 32%, rgba(255,255,255,.45) 50%, transparent 68%);
  transform: translateX(-130%);
  transition: transform .6s ease;
  pointer-events: none;
}
.abme-link:hover .abme-link-glow{ transform: translateX(130%); }
.abme-link:hover{ transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.abme-link:active{ transform: translateY(0) scale(.96); }
.abme-link svg{ width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: transform .2s ease; }
.abme-link:hover svg{ transform: translateX(3px); }

@media (prefers-reduced-motion: reduce){
  .about-me{ animation: none; opacity: 1; transform: none; }
  .abme-orb, .abme-sparkle, .abme-sig-ring, .abme-sig, .abme-sig-sheen, .abme-link-glow{ animation: none !important; }
  .abme-link:hover{ transform: none; }
}

@media (max-width: 720px){
  .abme-inner{ flex-direction: column; text-align: center; gap: 18px; }
  .abme-copy p{ max-width: 100%; }
}

/* ==========================================================================
   Secondary button + download row
   ========================================================================== */
.btn-secondary{
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--ink);
  padding: 13px 22px;
  font-size: .92rem;
}
.btn-secondary:hover:not(:disabled){ border-color: var(--accent-2); box-shadow: var(--shadow-sm); }

.download-row{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.notes-export{
  border-top: 1.5px dashed var(--border);
  margin-top: 22px;
  padding-top: 20px;
}
.notes-export-title{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0 0 4px;
}
.notes-export .step-sub{ margin-bottom: 14px; }
.notes-export .switch-field{ margin-bottom: 14px; }

/* ==========================================================================
   PDF worksheet design panel — background, accent, font, title & question
   style, decorative border, controlling PdfBuilder in script.js
   ========================================================================== */
.pdf-design-panel{
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 18px 6px;
  margin-bottom: 20px;
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.pdf-design-title{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0;
}
.pdf-design-title .step-icon{ width: 18px; height: 18px; flex: none; stroke: var(--accent); fill: none; stroke-width: 1.8; }
.pdf-design-panel > .field-note{ margin-top: -8px; }
.design-row{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
}
@media (max-width: 640px){ .design-row{ grid-template-columns: 1fr; } }
.pdf-design-panel .accent-tile{ padding: 12px 14px; }