/* ============================================================
   Padha World — public marketing pages (landing · ai-tutor · 404)
   Premium, calm, built to explain in 5 seconds
   ============================================================ */

.marketing { background: #f6f5fc; }

/* ---------- Sticky nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(246, 245, 252, 0.82);
  border-bottom: 1px solid rgba(236, 233, 247, 0.8);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 28px;
  padding: 14px 22px;
}
.nav-brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.nav-brand img { height: 38px; width: auto; }
.nav-brand .wordmark { font-size: 21px; color: var(--ink-900); }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a {
  color: var(--ink-700); text-decoration: none;
  font-size: 14px; font-weight: 600;
  padding: 9px 13px; border-radius: 10px;
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: var(--purple-50); color: var(--purple-800); }
.nav-cta { display: flex; gap: 10px; margin-left: auto; align-items: center; }
.nav-signin { color: var(--ink-700); text-decoration: none; font-size: 14px; font-weight: 700; padding: 10px 6px; }
.nav-signin:hover { color: var(--purple-800); }
.nav-burger { display: none; border: none; background: var(--purple-50); border-radius: 10px; padding: 9px; cursor: pointer; color: var(--purple-800); }

.nav-mobile { display: none; border-top: 1px solid var(--border); background: #fff; padding: 12px 18px 18px; }
.nav-mobile a { display: block; padding: 12px 12px; border-radius: 12px; color: var(--ink-900); text-decoration: none; font-weight: 600; }
.nav-mobile a:hover { background: var(--purple-50); }
.nav-mobile.open { display: block; animation: panel-in 0.25s var(--ease-out); }

/* ---------- Hero ---------- */
.mkt-hero { max-width: 1200px; margin: 0 auto; padding: 30px 22px 40px; }
.mkt-hero-grid {
  display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 30px; align-items: center;
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(700px 400px at 85% 15%, rgba(139, 61, 255, 0.14), transparent 60%),
    linear-gradient(140deg, #efeaff 0%, #f6f2ff 45%, #ffffff 100%);
  border: 1px solid #e7e2fb;
  overflow: hidden; position: relative;
}
.flag-pill {
  display: inline-flex; align-items: center; gap: 9px;
  background: #fff; border: 1px solid var(--purple-100);
  color: var(--purple-900); font-size: 12px; font-weight: 700;
  border-radius: var(--radius-pill); padding: 7px 14px; margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.mkt-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.1rem, 4.6vw, 3.6rem); line-height: 1.08;
  letter-spacing: -0.6px; margin: 0 0 16px; color: var(--ink-900);
}
.mkt-title .grad { background: linear-gradient(100deg, #7c3aed, #8b3dff 45%, #2f7cf6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.mkt-sub { font-size: 17px; color: var(--ink-700); line-height: 1.6; margin: 0 0 22px; max-width: 520px; }
.mkt-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.mkt-trust { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.avatar-stack { display: flex; }
.avatar-stack span {
  width: 36px; height: 36px; border-radius: 50%; border: 2px solid #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 10.5px; font-weight: 800; color: #fff; letter-spacing: 0.3px;
}
.avatar-stack span:nth-child(1) { background: #8b3dff; }
.avatar-stack span:nth-child(2) { background: #2f7cf6; margin-left: -10px; }
.avatar-stack span:nth-child(3) { background: #f43f5e; margin-left: -10px; }
.avatar-stack span:nth-child(4) { background: #f59e0b; margin-left: -10px; }
.trust-text { font-size: 12.5px; color: var(--ink-500); line-height: 1.45; }
.trust-text strong { color: var(--ink-900); }

.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-blob {
  position: absolute; inset: 6% 4%;
  background: radial-gradient(closest-side, #e5dcff 0%, rgba(229, 220, 255, 0) 75%);
  border-radius: 40px;
}
.hero-visual img {
  position: relative; width: min(400px, 82%); height: auto; border-radius: 28px;
  box-shadow: var(--shadow-lg);
  animation: gentle-float 6.5s ease-in-out infinite;
}
@keyframes gentle-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid #eae6fa;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 10px 14px;
  display: flex; align-items: center; gap: 10px;
  animation: gentle-float 5.5s ease-in-out infinite;
}
.float-card .fc-title { font-size: 11px; font-weight: 800; color: var(--ink-900); line-height: 1.3; }
.float-card .fc-sub { font-size: 10px; color: var(--ink-500); }
.float-card.fc-1 { top: 9%; left: -4%; animation-delay: 0.4s; }
.float-card.fc-2 { top: 40%; right: -6%; animation-delay: 1.3s; }
.float-card.fc-3 { bottom: 10%; left: 2%; animation-delay: 2.1s; }
.fc-icon { width: 36px; height: 36px; border-radius: 11px; display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.fc-purple { background: var(--purple-100); color: var(--purple-700); }
.fc-blue { background: #e3edff; color: var(--blue-600); }
.fc-green { background: #e3f9ec; color: #15803d; }

/* ---------- Logo/metrics strip ---------- */
.metrics {
  max-width: 1200px; margin: 6px auto 0; padding: 0 22px 8px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.metric { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px 18px; text-align: center; }
.metric .m-num { font-family: var(--font-display); font-weight: 800; font-size: 26px; color: var(--purple-800); }
.metric .m-lbl { font-size: 12px; color: var(--ink-500); font-weight: 600; }

/* ---------- Sections ---------- */
.section { max-width: 1200px; margin: 0 auto; padding: 46px 22px; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 30px; }
.section-eyebrow { font-size: 11px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: var(--purple-500); margin-bottom: 10px; }
.section-title { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.6rem, 3vw, 2.4rem); letter-spacing: -0.4px; margin: 0 0 10px; }
.section-sub { color: var(--ink-500); font-size: 15.5px; line-height: 1.6; margin: 0; }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px 22px; position: relative; counter-increment: step;
}
.step::before {
  content: counter(step);
  position: absolute; top: -16px; left: 20px;
  width: 34px; height: 34px; border-radius: 12px;
  background: linear-gradient(135deg, #8b3dff, #6d28d9); color: #fff;
  font-family: var(--font-display); font-weight: 800; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 14px rgba(124, 58, 237, 0.4);
}
.step h3 { font-family: var(--font-display); font-size: 18px; margin: 8px 0 6px; }
.step p { font-size: 13.5px; color: var(--ink-500); line-height: 1.6; margin: 0; }

/* features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 22px; transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon { width: 48px; height: 48px; border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.feature h3 { font-family: var(--font-display); font-size: 17.5px; margin: 0 0 6px; }
.feature p { font-size: 13.5px; color: var(--ink-500); line-height: 1.6; margin: 0; }

/* subjects chips */
.subject-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.subject-chips a {
  text-decoration: none; font-size: 13.5px; font-weight: 600; color: var(--ink-700);
  background: #fff; border: 1px solid var(--border-strong); border-radius: var(--radius-pill);
  padding: 9px 18px; transition: all 0.15s;
}
.subject-chips a:hover { border-color: var(--purple-400); color: var(--purple-800); background: var(--purple-50); transform: translateY(-2px); }

/* FAQ accordion */
.faq { max-width: 840px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  text-align: left; background: none; border: none; cursor: pointer;
  font-size: 15.5px; font-weight: 700; color: var(--ink-900); padding: 18px 20px;
}
.faq-q svg { flex: 0 0 auto; transition: transform 0.25s; color: var(--purple-600); }
.faq-item.open .faq-q svg { transform: rotate(45deg); }
.faq-a { display: none; padding: 0 20px 18px; color: var(--ink-700); font-size: 14px; line-height: 1.65; }
.faq-item.open .faq-a { display: block; animation: panel-in 0.25s var(--ease-out); }

/* CTA banner */
.cta-banner {
  border-radius: var(--radius-xl);
  padding: clamp(30px, 5vw, 54px);
  text-align: center;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(168, 117, 240, 0.35), transparent 60%),
    radial-gradient(600px 300px at 80% 100%, rgba(79, 156, 249, 0.35), transparent 60%),
    #0d0618;
  color: #fff; margin-bottom: 8px;
}
.cta-banner h2 { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.7rem, 3.4vw, 2.6rem); margin: 0 0 12px; letter-spacing: -0.4px; }
.cta-banner p { color: #b8b3cc; margin: 0 0 22px; font-size: 15.5px; }

/* footer */
.footer { border-top: 1px solid var(--border); background: #fff; }
.footer-inner {
  max-width: 1200px; margin: 0 auto; padding: 26px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  font-size: 13px; color: var(--ink-500);
}
.footer-inner nav { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-inner a { color: var(--ink-700); text-decoration: none; font-weight: 600; }
.footer-inner a:hover { color: var(--purple-800); }
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; color: var(--ink-900); }
.footer-brand img { height: 26px; }

/* ---------- AI Tutor page specific ---------- */
.ai-hero { max-width: 1200px; margin: 0 auto; padding: 34px 22px 10px; }
.ai-hero-inner {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center;
  padding: clamp(24px, 4vw, 48px); border-radius: var(--radius-xl);
  background: linear-gradient(140deg, #120a24 0%, #1d1038 100%);
  color: #fff; overflow: hidden;
}
.ai-hero h1 { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.9rem, 3.8vw, 3rem); line-height: 1.12; margin: 0 0 14px; letter-spacing: -0.4px; }
.ai-hero .lede { color: #c9c3e4; font-size: 16.5px; line-height: 1.65; margin: 0 0 22px; }
.ai-hero .lede strong { color: #fff; }
.ai-points { display: grid; gap: 10px; margin: 0 0 24px; padding: 0; list-style: none; }
.ai-points li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: #ddd8f8; line-height: 1.5; }
.ai-points svg { color: #a875f0; flex: 0 0 auto; margin-top: 2px; }

.chat-demo {
  background: #1b1136; border: 1px solid rgba(168, 117, 240, 0.25);
  border-radius: 20px; padding: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.chat-demo-head { display: flex; align-items: center; gap: 10px; padding: 2px 6px 12px; border-bottom: 1px solid rgba(168,117,240,0.18); margin-bottom: 12px; }
.chat-demo-head .online { width: 9px; height: 9px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 8px #22c55e; }
.chat-demo-head b { font-size: 13px; }
.chat-demo-head span { font-size: 11px; color: #8f88ac; display: block; }
.bubble { border-radius: 16px; padding: 10px 13px; font-size: 13px; line-height: 1.55; max-width: 88%; margin-bottom: 10px; }
.bubble.user { background: #6d28d9; color: #fff; margin-left: auto; border-bottom-right-radius: 4px; }
.bubble.ai { background: #261a48; color: #e9e4ff; border: 1px solid rgba(168,117,240,0.22); border-bottom-left-radius: 4px; }
.bubble b { color: #c4a8f8; }

.example-q { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.example-q a {
  background: #fff; border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  padding: 14px 16px; font-size: 14px; font-weight: 600; color: var(--ink-700); text-decoration: none;
  transition: all 0.15s; line-height: 1.45;
}
.example-q a:hover { border-color: var(--purple-400); color: var(--purple-800); transform: translateY(-2px); }

/* 404 */
.err-shell { min-height: 70vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 40px 20px; }
.err-code { font-family: var(--font-display); font-weight: 800; font-size: clamp(4rem, 14vw, 7rem); line-height: 1; background: linear-gradient(135deg, #8b3dff, #2f7cf6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* breadcrumb */
.crumbs { max-width: 1200px; margin: 0 auto; padding: 18px 22px 0; font-size: 12.5px; color: var(--ink-500); }
.crumbs a { color: var(--purple-700); text-decoration: none; font-weight: 600; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .nav-links { display: none; }
  .nav-burger { display: inline-flex; margin-left: auto; }
  .nav-cta { margin-left: 0; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 920px) {
  .mkt-hero-grid, .ai-hero-inner { grid-template-columns: 1fr; padding: 26px 20px; }
  .float-card { display: none; }
  .hero-visual img { width: min(330px, 88%); }
  .steps { grid-template-columns: 1fr; gap: 22px; }
  .example-q { grid-template-columns: 1fr; }
  .nav-signin { display: none; }
}
@media (max-width: 620px) {
  .features { grid-template-columns: 1fr; }
  .nav-cta .btn { padding: 10px 14px; font-size: 13px; }
}

/* ============================================================
   Public growth additions — demo AI, cards, daily quiz, footer cols
   ============================================================ */

/* visually-hidden (accessible labels) */
.visually-hidden { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }

/* ---------- AI demo box (hero) ---------- */
.ai-demo-box { background:#fff; border:1px solid var(--purple-200); border-radius:var(--radius-lg); padding:14px; box-shadow:var(--shadow-md); max-width:540px; }
.ai-demo-row { display:flex; gap:10px; }
.ai-demo-input { flex:1; min-width:0; border:1.5px solid var(--border-strong); border-radius:var(--radius-pill); padding:14px 18px; font-size:15px; font-family:inherit; background:#fdfcff; color:var(--ink-900); transition:border-color .15s, box-shadow .15s; }
.ai-demo-input::placeholder { color:var(--ink-300); }
.ai-demo-input:focus-visible { outline:none; border-color:var(--purple-500); box-shadow:0 0 0 4px rgba(139,61,255,.18); }
.ai-demo-btn { border:none; border-radius:var(--radius-pill); padding:0 22px; font-weight:800; font-size:15px; font-family:inherit; color:#fff; cursor:pointer; background:linear-gradient(135deg,#8b3dff,#6d28d9); transition:transform .15s, box-shadow .15s; box-shadow:0 6px 18px rgba(124,58,237,.35); }
.ai-demo-btn:hover { transform:translateY(-1px); }
.ai-demo-btn[disabled] { opacity:.65; cursor:progress; transform:none; }
.ai-demo-note { font-size:12px; color:var(--ink-500); margin:9px 4px 0; }
.ai-demo-chips { display:flex; flex-wrap:wrap; gap:8px; margin:10px 2px 0; }
.ai-demo-chips button { font-family:inherit; font-size:12px; font-weight:600; color:var(--purple-800); background:var(--purple-50); border:1px solid var(--purple-100); border-radius:999px; padding:6px 12px; cursor:pointer; transition:background .15s; }
.ai-demo-chips button:hover { background:var(--purple-100); }
.ai-demo-result { display:none; margin-top:12px; }
.ai-demo-result.show { display:block; animation:panel-in 0.3s var(--ease-out); }
.demo-answer { background:var(--purple-50); border:1px solid var(--purple-100); border-radius:16px; padding:12px 14px; font-size:13.5px; line-height:1.62; color:var(--ink-900); white-space:pre-line; }
.demo-followup { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:10px; flex-wrap:wrap; }
.demo-followup small { color:var(--ink-500); font-size:12px; }
.demo-signup { font-size:12.5px; font-weight:800; color:var(--purple-800); text-decoration:none; background:#fff; border:1px solid var(--purple-200); padding:8px 14px; border-radius:999px; }
.demo-signup:hover { background:var(--purple-50); }
.ai-demo-error { display:none; margin-top:10px; color:var(--danger); font-size:12.5px; font-weight:600; }
.ai-demo-error.show { display:block; }

/* ---------- Subject / lesson / tool cards ---------- */
.subject-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.subject-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-lg); padding:18px; text-decoration:none; display:flex; flex-direction:column; gap:8px; transition:transform .2s var(--ease-out), box-shadow .2s var(--ease-out), border-color .2s; }
.subject-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:var(--purple-300); }
.sc-icon { width:52px; height:52px; border-radius:15px; display:flex; align-items:center; justify-content:center; }
.sc-title { font-family:var(--font-display); font-weight:800; font-size:16.5px; color:var(--ink-900); margin:0; }
.sc-desc { font-size:12px; color:var(--ink-500); line-height:1.5; margin:0; }
.sc-tag { align-self:flex-start; margin-top:auto; font-size:10.5px; font-weight:800; letter-spacing:.6px; text-transform:uppercase; border-radius:999px; padding:4px 10px; }
.sc-tag.public { background:var(--success-bg); color:var(--success); }
.sc-tag.account { background:var(--warning-bg); color:var(--warning); }
.sc-tag.play { background:#e3edff; color:var(--blue-600); }

.lesson-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:14px; }
.lesson-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-lg); padding:18px; text-decoration:none; display:flex; flex-direction:column; gap:8px; transition:transform .2s var(--ease-out), box-shadow .2s var(--ease-out); }
.lesson-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); }
.lc-subject { font-size:10.5px; font-weight:800; letter-spacing:.8px; text-transform:uppercase; color:var(--purple-600); }
.lc-title { font-family:var(--font-display); font-weight:800; font-size:16px; color:var(--ink-900); line-height:1.35; margin:0; }
.lc-desc { font-size:12px; color:var(--ink-500); line-height:1.55; margin:0; }
.lc-meta { margin-top:auto; font-size:11px; color:var(--ink-300); font-weight:600; display:flex; align-items:center; gap:6px; }

.tools-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.tool-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-lg); padding:20px; text-decoration:none; display:flex; flex-direction:column; gap:8px; transition:transform .2s var(--ease-out), box-shadow .2s var(--ease-out); }
.tool-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); }
.tool-card h3 { font-family:var(--font-display); font-size:16.5px; margin:0; color:var(--ink-900); }
.tool-card p { font-size:12.5px; color:var(--ink-500); line-height:1.55; margin:0; }
.tool-card span.go { font-size:12.5px; font-weight:800; color:var(--purple-700); margin-top:auto; }

/* ---------- Daily quiz band ---------- */
.daily-band { max-width:1200px; margin:0 auto; padding:8px 22px 46px; }
.daily-band-inner { border-radius:var(--radius-xl); padding:clamp(26px,4vw,44px); display:flex; align-items:center; justify-content:space-between; gap:26px; flex-wrap:wrap; background:linear-gradient(120deg,#0d0618 0%,#1d1038 55%,#251047 100%); color:#fff; border:1px solid rgba(168,117,240,.25); }
.daily-band-inner h2 { font-family:var(--font-display); font-weight:800; font-size:clamp(1.5rem,2.6vw,2.1rem); margin:0 0 8px; letter-spacing:-0.3px; }
.daily-band-inner p { color:#b8b3cc; font-size:14.5px; line-height:1.6; margin:0; max-width:480px; }
.daily-band-inner .eyebrow { font-size:11px; font-weight:800; letter-spacing:2px; text-transform:uppercase; color:#a875f0; margin-bottom:8px; }
.daily-band-cta { display:flex; flex-direction:column; gap:10px; align-items:flex-start; }
.daily-band-cta small { color:#8f88ac; font-size:11.5px; }

/* ---------- Public content pages (lessons / subjects) ---------- */
.article { max-width:880px; margin:0 auto; padding:26px 22px 60px; }
.article-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-xl); padding:clamp(24px,4vw,44px); }
.article h1 { font-family:var(--font-display); font-weight:800; font-size:clamp(1.7rem,3.4vw,2.5rem); line-height:1.18; letter-spacing:-0.4px; margin:6px 0 14px; color:var(--ink-900); }
.article h2 { font-family:var(--font-display); font-weight:800; font-size:clamp(1.25rem,2vw,1.6rem); margin:28px 0 10px; color:var(--ink-900); letter-spacing:-0.2px; }
.article h3 { font-family:var(--font-display); font-weight:800; font-size:1.05rem; margin:18px 0 6px; color:var(--ink-900); }
.article p, .article li { font-size:15px; color:var(--ink-700); line-height:1.7; }
.article p { margin:0 0 14px; }
.article ul, .article ol { padding-left:22px; margin:0 0 14px; }
.article li { margin-bottom:6px; }
.direct-answer { background:var(--purple-50); border-left:4px solid var(--purple-500); border-radius:12px; padding:14px 16px; margin:0 0 20px; font-size:15.5px; color:var(--ink-900); line-height:1.65; }
.direct-answer strong { color:var(--purple-900); }
.example-box { background:#fbfaff; border:1px dashed var(--purple-200); border-radius:14px; padding:14px 16px; margin:0 0 16px; }
.example-box p { margin-bottom:8px; }
.example-box p:last-child { margin-bottom:0; }
.key-points { background:#fff; border:1px solid var(--border); border-radius:14px; padding:14px 18px; margin:0 0 16px; }
.try-it { background:#0d0618; color:#e9e4ff; border-radius:var(--radius-lg); padding:20px; margin:24px 0 6px; }
.try-it h2 { color:#fff; margin-top:0; font-size:1.2rem; }
.try-q { margin-bottom:14px; }
.try-q p { color:#e9e4ff; font-weight:600; font-size:14px; margin-bottom:8px; line-height:1.5; }
.try-options { display:grid; gap:8px; }
.try-opt { text-align:left; background:#1b1136; border:1px solid rgba(168,117,240,.3); color:#e9e4ff; border-radius:12px; padding:10px 13px; font-size:13px; font-family:inherit; cursor:pointer; transition:border-color .15s, background .15s; }
.try-opt:hover { border-color:#a875f0; }
.try-opt.correct { background:#123b2a; border-color:#22c55e; color:#a7f3d0; }
.try-opt.wrong { background:#431525; border-color:#f43f5e; color:#fecdd3; }
.share-row { display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin:20px 0 0; }
.share-row span { font-size:12px; font-weight:800; color:var(--ink-500); letter-spacing:.4px; text-transform:uppercase; }
.share-btn { display:inline-flex; align-items:center; gap:7px; border:1px solid var(--border-strong); background:#fff; color:var(--ink-700); border-radius:999px; padding:8px 13px; font-size:12px; font-weight:700; text-decoration:none; font-family:inherit; cursor:pointer; transition:all .15s; }
.share-btn:hover { border-color:var(--purple-400); color:var(--purple-800); transform:translateY(-1px); }
.related-box { border-top:1px solid var(--border); margin-top:22px; padding-top:16px; }
.related-box h2 { margin-top:0; font-size:1.05rem; }
.related-links { display:flex; flex-wrap:wrap; gap:10px; }
.related-links a { font-size:12.5px; font-weight:700; color:var(--purple-800); background:var(--purple-50); border:1px solid var(--purple-100); border-radius:999px; padding:8px 14px; text-decoration:none; }
.related-links a:hover { background:var(--purple-100); }
.signup-note { text-align:center; background:linear-gradient(140deg,#efeaff,#f6f2ff); border:1px solid #e7e2fb; border-radius:var(--radius-lg); padding:22px; margin:26px 0 0; }
.signup-note h2 { margin:0 0 6px; font-size:1.3rem; }
.signup-note p { margin:0 0 14px; font-size:13.5px; color:var(--ink-500); }

/* tools page */
.tool-shell { max-width:880px; margin:0 auto; padding:26px 22px 60px; display:grid; gap:18px; }
.tool-panel { background:#fff; border:1px solid var(--border); border-radius:var(--radius-xl); padding:clamp(20px,3vw,32px); scroll-margin-top:90px; }
.tool-panel h2 { font-family:var(--font-display); font-weight:800; font-size:1.35rem; margin:0 0 6px; letter-spacing:-0.2px; }
.tool-panel > p { color:var(--ink-500); font-size:13.5px; line-height:1.6; margin:0 0 16px; }
.calc-grid { display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.calc-block { border:1px solid var(--border); border-radius:var(--radius-md); padding:16px; }
.calc-block h3 { font-size:13px; font-weight:800; color:var(--ink-700); margin:0 0 10px; }
.calc-row { display:flex; gap:8px; align-items:center; flex-wrap:wrap; font-size:14px; color:var(--ink-700); }
.calc-input { width:92px; border:1px solid var(--border-strong); border-radius:10px; padding:10px 10px; font-size:15px; font-family:inherit; }
.calc-input:focus-visible { outline:none; border-color:var(--purple-500); box-shadow:0 0 0 3px rgba(139,61,255,.16); }
.calc-out { background:var(--purple-50); border:1px solid var(--purple-100); border-radius:10px; font-weight:800; padding:10px 12px; min-width:110px; text-align:center; color:var(--purple-900); }
.calc-out small { display:block; font-size:10px; font-weight:700; color:var(--ink-500); text-transform:uppercase; letter-spacing:.6px; }

/* flashcards */
.flash-stage { text-align:center; }
.flash-card { margin:14px auto 12px; max-width:340px; min-height:150px; border-radius:var(--radius-lg); border:2px solid var(--purple-200); background:linear-gradient(150deg,#efeaff,#fff); display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-weight:800; font-size:2rem; color:var(--purple-900); cursor:pointer; user-select:none; transition:transform .18s var(--ease-out); padding:18px; }
.flash-card:hover { transform:scale(1.02); }
.flash-card small { display:block; font-size:11px; letter-spacing:1.4px; text-transform:uppercase; color:var(--ink-500); font-family:var(--font-body); font-weight:800; margin-bottom:6px; }
.flash-controls { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }
.flash-btn { border:1px solid var(--border-strong); background:#fff; border-radius:999px; padding:10px 20px; font-weight:800; font-size:13px; cursor:pointer; font-family:inherit; color:var(--ink-700); }
.flash-btn.good { background:var(--success-bg); border-color:#86efac; color:#15803d; }
.flash-btn.bad { background:var(--danger-bg); border-color:#fda4af; color:var(--danger); }
.flash-meter { display:flex; justify-content:center; gap:18px; margin-top:12px; font-size:12.5px; font-weight:700; color:var(--ink-500); }
.flash-meter b { color:var(--ink-900); }

/* daily quiz page */
.quiz-shell { max-width:760px; margin:0 auto; padding:26px 22px 60px; }
.quiz-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-xl); padding:clamp(22px,4vw,38px); }
.quiz-progress { display:flex; gap:6px; margin:6px 0 18px; }
.quiz-progress span { height:6px; flex:1; border-radius:99px; background:var(--purple-100); }
.quiz-progress span.done { background:var(--purple-600); }
.quiz-progress span.current { background:linear-gradient(90deg,#a875f0,#6d28d9); }
.quiz-q { font-family:var(--font-display); font-weight:800; font-size:1.35rem; margin:0 0 14px; letter-spacing:-0.2px; }
.quiz-opts { display:grid; gap:10px; }
.quiz-opt { text-align:left; border:1.5px solid var(--border-strong); background:#fff; border-radius:var(--radius-md); padding:13px 15px; font-size:14.5px; font-family:inherit; cursor:pointer; transition:all .15s; }
.quiz-opt:hover { border-color:var(--purple-400); background:var(--purple-50); }
.quiz-opt.correct { border-color:var(--success); background:var(--success-bg); }
.quiz-opt.wrong { border-color:var(--danger); background:var(--danger-bg); }
.quiz-next { margin-top:16px; }
.quiz-result { text-align:center; padding:10px 0 4px; }
.quiz-score { font-family:var(--font-display); font-weight:800; font-size:3rem; line-height:1; color:var(--purple-700); }

/* ---------- Rich footer ---------- */
.footer-cols { max-width:1200px; margin:0 auto; padding:34px 22px 12px; display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:28px; }
.footer-col h2 { font-size:11px; font-weight:800; letter-spacing:2px; text-transform:uppercase; color:var(--ink-500); margin:0 0 10px; }
.footer-col a { display:block; color:var(--ink-700); text-decoration:none; font-size:13px; padding:4px 0; }
.footer-col a:hover { color:var(--purple-800); }
.footer-bottom { border-top:1px solid var(--border); max-width:1200px; margin:0 auto; padding:14px 22px 20px; display:flex; justify-content:space-between; gap:10px; flex-wrap:wrap; font-size:12px; color:var(--ink-500); }
.footer-bottom a { color:var(--purple-800); text-decoration:none; font-weight:700; }

/* ---------- Responsive for additions ---------- */
@media (max-width: 1020px) {
  .subject-grid, .lesson-grid { grid-template-columns:repeat(2,1fr); }
  .tools-grid { grid-template-columns:repeat(2,1fr); }
  .footer-cols { grid-template-columns:1fr 1fr; }
  .calc-grid { grid-template-columns:1fr; }
}
@media (max-width: 620px) {
  .subject-grid, .lesson-grid, .tools-grid { grid-template-columns:1fr; }
  .footer-cols { grid-template-columns:1fr; }
  .ai-demo-row { flex-direction:column; }
  .ai-demo-btn { padding:13px 18px; }
}

/* ============================================================
   Padha Play — viral challenges & friendship quizzes
   ============================================================ */
.play-hero { max-width:1200px; margin:0 auto; padding:34px 22px 8px; }
.play-hero-inner { position:relative; overflow:hidden; border-radius:var(--radius-xl); padding:clamp(28px,5vw,56px); text-align:center; color:#fff; border:1px solid rgba(168,117,240,.3); background:radial-gradient(700px 380px at 20% -10%, rgba(139,61,255,.5), transparent 60%), radial-gradient(700px 380px at 85% 110%, rgba(47,124,246,.45), transparent 60%), #0d0618; }
.play-hero h1 { font-family:var(--font-display); font-weight:800; font-size:clamp(1.9rem,4.6vw,3.3rem); line-height:1.1; letter-spacing:-0.6px; margin:0 auto 14px; max-width:880px; }
.play-hero .lede { color:#c9c3e4; font-size:16.5px; line-height:1.6; max-width:560px; margin:0 auto 22px; }
.play-hero .cta-row { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }
.play-hero .meta-line { margin-top:14px; font-size:12px; color:#8f88ac; }
.play-spark { position:absolute; font-size:22px; opacity:.55; pointer-events:none; user-select:none; }

.challenge-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:14px; }
.challenge-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-lg); padding:18px; text-decoration:none; display:flex; flex-direction:column; gap:7px; transition:transform .2s var(--ease-out), box-shadow .2s var(--ease-out), border-color .2s; }
.challenge-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:var(--purple-300); }
.cc-emoji { font-size:36px; line-height:1; }
.cc-title { font-family:var(--font-display); font-weight:800; font-size:15.5px; color:var(--ink-900); margin:0; }
.cc-desc { font-size:12px; color:var(--ink-500); line-height:1.55; margin:0; }
.cc-tag { align-self:flex-start; margin-top:auto; font-size:10px; font-weight:800; letter-spacing:.7px; text-transform:uppercase; border-radius:999px; padding:4px 10px; background:var(--success-bg); color:var(--success); }
.cc-tag.signin { background:var(--warning-bg); color:var(--warning); }
.cc-tag.star { background:#efe4ff; color:var(--purple-700); }

.play-card { background:#fff; border:1px solid var(--border); border-radius:var(--radius-xl); padding:clamp(22px,3.4vw,36px); }
.field-label { font-size:12.5px; font-weight:800; color:var(--ink-700); margin:16px 0 6px; display:block; }
.field-input, .field-area { width:100%; border:1.5px solid var(--border-strong); border-radius:12px; padding:12px 14px; font-size:15px; font-family:inherit; color:var(--ink-900); background:#fdfcff; }
.field-input:focus-visible, .field-area:focus-visible { outline:none; border-color:var(--purple-500); box-shadow:0 0 0 3px rgba(139,61,255,.16); }
.q-block { border:1px solid var(--border); border-radius:var(--radius-lg); padding:16px; margin-bottom:14px; background:#fbfaff; }
.q-block-head { display:flex; justify-content:space-between; align-items:center; gap:10px; margin-bottom:8px; }
.q-block-head strong { font-size:13px; color:var(--purple-800); }
.icon-btn { border:none; background:var(--danger-bg); color:var(--danger); border-radius:10px; padding:7px 11px; font-size:12px; font-weight:800; cursor:pointer; font-family:inherit; }
.opt-row { display:flex; gap:8px; align-items:center; margin-bottom:8px; }
.opt-correct { flex:0 0 auto; width:22px; height:22px; accent-color:#7c3aed; cursor:pointer; }
.opt-input { flex:1; border:1px solid var(--border-strong); border-radius:10px; padding:10px 12px; font-size:14px; font-family:inherit; }
.opt-input:focus-visible { outline:none; border-color:var(--purple-500); }
.opt-correct-wrap { font-size:10.5px; font-weight:800; color:var(--ink-500); text-transform:uppercase; letter-spacing:.5px; white-space:nowrap; }

.result-card-canvas { width:100%; max-width:440px; height:auto; border-radius:var(--radius-lg); display:block; margin:0 auto; box-shadow:var(--shadow-lg); }

.poll-option { display:block; width:100%; text-align:left; border:1.5px solid var(--border-strong); background:#fff; border-radius:var(--radius-md); padding:13px 15px; font-size:14.5px; font-family:inherit; color:var(--ink-800); cursor:pointer; transition:all .15s; }
.poll-option:hover { border-color:var(--purple-400); background:var(--purple-50); }
.poll-option.voted-a, .poll-option.voted-b { border-color:var(--purple-500); background:var(--purple-50); font-weight:700; }
.poll-bar { height:26px; border-radius:8px; background:var(--purple-100); overflow:hidden; margin:8px 0 2px; }
.poll-bar-fill { height:100%; background:linear-gradient(90deg,#a875f0,#6d28d9); width:0%; transition:width .6s var(--ease-out); border-radius:8px; }
.poll-pct { font-size:12px; font-weight:800; color:var(--ink-700); display:flex; justify-content:space-between; }

.wrapped-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:14px; margin:16px 0; }
.wrapped-stat { background:var(--purple-50); border:1px solid var(--purple-100); border-radius:var(--radius-lg); padding:18px; text-align:center; }
.wrapped-stat b { display:block; font-family:var(--font-display); font-weight:800; font-size:2rem; color:var(--purple-800); line-height:1.1; }
.wrapped-stat span { font-size:11.5px; font-weight:700; color:var(--ink-500); text-transform:uppercase; letter-spacing:.6px; }

@media (max-width: 620px) {
  .wrapped-grid { grid-template-columns:1fr 1fr; gap:10px; }
  .wrapped-stat b { font-size:1.5rem; }
}