/**
 * Teacher To Do landing — dark blue / violet, conversion-focused.
 * Paywall band uses styles/otc-paywall.css (loaded separately).
 */
@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@600;700;800&display=swap");

:root {
  --td-bg0: #050814;
  --td-bg1: #0a0f24;
  --td-bg2: #12183a;
  --td-ink: #f1f5f9;
  --td-muted: #94a3b8;
  --td-dim: #64748b;
  --td-violet: #8b5cf6;
  --td-violet-deep: #6d28d9;
  --td-blue: #3b82f6;
  --td-blue-deep: #1d4ed8;
  --td-cyan: #22d3ee;
  --td-border: rgba(129, 140, 248, 0.35);
  --td-glass: rgba(15, 23, 42, 0.55);
  --td-glass2: rgba(30, 27, 75, 0.45);
  --td-radius: 20px;
  --td-radius-sm: 14px;
  --td-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --td-glow: 0 0 60px rgba(139, 92, 246, 0.22);
}

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

html {
  scroll-behavior: smooth;
}

body.td-page {
  margin: 0;
  min-height: 100vh;
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--td-ink);
  background: var(--td-bg0);
  overflow-x: hidden;
}

.td-page h1,
.td-page h2,
.td-page h3 {
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  letter-spacing: -0.03em;
}

.td-skip {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.td-skip:focus {
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 10px 16px;
  background: #fff;
  color: #0f172a;
  border-radius: 10px;
  z-index: 9999;
  font-weight: 700;
}

/* Ambient orbs */
.td-ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.td-ambient__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: td-drift 22s ease-in-out infinite;
}
.td-ambient__blob--1 {
  width: min(520px, 90vw);
  height: min(520px, 90vw);
  background: radial-gradient(circle, rgba(99, 102, 241, 0.55) 0%, transparent 70%);
  top: -12%;
  right: -8%;
  animation-delay: 0s;
}
.td-ambient__blob--2 {
  width: min(480px, 85vw);
  height: min(480px, 85vw);
  background: radial-gradient(circle, rgba(139, 92, 246, 0.4) 0%, transparent 68%);
  bottom: -15%;
  left: -10%;
  animation-delay: -8s;
}
.td-ambient__blob--3 {
  width: min(360px, 70vw);
  height: min(360px, 70vw);
  background: radial-gradient(circle, rgba(59, 130, 246, 0.35) 0%, transparent 65%);
  top: 42%;
  left: 28%;
  animation-delay: -14s;
}

@keyframes td-drift {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(2%, 3%) scale(1.04);
  }
  66% {
    transform: translate(-2%, -2%) scale(0.98);
  }
}

@media (prefers-reduced-motion: reduce) {
  .td-ambient__blob {
    animation: none;
  }
}

.td-shell {
  position: relative;
  z-index: 1;
}

/* Topbar */
.td-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(129, 140, 248, 0.15);
  background: rgba(5, 8, 20, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.td-topbar-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
}
.td-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--td-ink);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.td-brand:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}
.td-brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: contain;
}
.td-brand-text {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  font-size: 0.95rem;
}
/* Hero */
.td-hero {
  padding: clamp(40px, 8vw, 88px) 22px clamp(56px, 10vw, 100px);
  position: relative;
}
.td-hero-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  gap: clamp(40px, 6vw, 64px);
  align-items: center;
}
@media (min-width: 980px) {
  .td-hero-inner {
    grid-template-columns: 1fr 1.02fr;
  }
}

.td-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--td-cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  padding: 8px 14px;
  margin-bottom: 18px;
}

.td-hero h1 {
  font-size: clamp(2rem, 4.8vw, 3.15rem);
  font-weight: 800;
  line-height: 1.1;
  margin: 0 0 18px;
  color: #fff;
  text-wrap: balance;
}

.td-hero h1 span {
  background: linear-gradient(135deg, #a5b4fc 0%, #c4b5fd 40%, #22d3ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.td-lead {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--td-muted);
  max-width: 36rem;
  margin: 0 0 26px;
  line-height: 1.65;
}
.td-lead strong {
  color: #e2e8f0;
  font-weight: 600;
}

.td-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.td-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 26px;
  border-radius: 14px;
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.25s ease;
}
.td-btn:active {
  transform: scale(0.98);
}

.td-btn-primary {
  background: linear-gradient(135deg, var(--td-blue-deep) 0%, var(--td-violet-deep) 55%, #5b21b6 100%);
  color: #fff;
  box-shadow: 0 12px 40px rgba(91, 33, 182, 0.45), var(--td-glow);
}
.td-btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.18) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.55s ease;
}
.td-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 50px rgba(91, 33, 182, 0.55), 0 0 80px rgba(139, 92, 246, 0.25);
}
.td-btn-primary:hover::before {
  transform: translateX(100%);
}

.td-btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
  border: 1px solid var(--td-border);
  backdrop-filter: blur(8px);
}
.td-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(165, 180, 252, 0.55);
  transform: translateY(-2px);
}

.td-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--td-dim);
}
.td-trust-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.td-trust-row span::before {
  content: "✓";
  color: #34d399;
  font-weight: 900;
}

.td-hero-note {
  margin-top: 22px;
  font-size: 0.85rem;
  color: var(--td-dim);
  max-width: 34rem;
  line-height: 1.5;
}
.td-hero-note a {
  color: var(--td-cyan);
  font-weight: 600;
  text-decoration: none;
}
.td-hero-note a:hover {
  text-decoration: underline;
}

/* Board mock */
.td-board-stage {
  perspective: 1400px;
}
.td-board {
  position: relative;
  border-radius: var(--td-radius);
  padding: clamp(18px, 3vw, 26px);
  background: linear-gradient(145deg, rgba(30, 27, 75, 0.85) 0%, rgba(15, 23, 42, 0.92) 100%);
  border: 1px solid var(--td-border);
  box-shadow: var(--td-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s ease;
}
.td-board-stage:hover .td-board {
  transform: rotateX(2deg) rotateY(-2deg) translateY(-4px);
  box-shadow: var(--td-shadow), 0 0 0 1px rgba(139, 92, 246, 0.25), 0 0 80px rgba(99, 102, 241, 0.12);
}

.td-board-label {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--td-dim);
  margin-bottom: 14px;
}

.td-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
@media (max-width: 640px) {
  .td-columns {
    grid-template-columns: 1fr;
  }
}

.td-col {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--td-radius-sm);
  padding: 10px 8px 12px;
  border: 1px solid rgba(129, 140, 248, 0.12);
  min-height: 200px;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.td-col:hover {
  border-color: rgba(129, 140, 248, 0.35);
  background: rgba(0, 0, 0, 0.32);
}

.td-col-title {
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #818cf8;
  text-align: center;
  margin-bottom: 10px;
}

.td-card {
  margin: 0 auto 8px;
  padding: 11px 12px;
  border-radius: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.35;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  cursor: default;
}
.td-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  border-color: rgba(255, 255, 255, 0.2);
}

.td-card--a {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.35) 0%, rgba(79, 70, 229, 0.5) 100%);
  color: #e0e7ff;
}
.td-card--b {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.3) 0%, rgba(109, 40, 217, 0.45) 100%);
  color: #ede9fe;
}
.td-card--c {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.3) 0%, rgba(29, 78, 216, 0.45) 100%);
  color: #dbeafe;
}

/* Sections */
.td-section {
  padding: clamp(56px, 10vw, 96px) 22px;
  position: relative;
}
.td-section--mesh {
  background: linear-gradient(180deg, transparent 0%, rgba(30, 27, 75, 0.2) 50%, transparent 100%);
}
.td-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.td-section-head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 48px;
}
.td-eyebrow {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #a5b4fc;
  margin-bottom: 12px;
}
.td-h2 {
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 14px;
  color: #fff;
}
.td-sub {
  margin: 0;
  font-size: 1.05rem;
  color: var(--td-muted);
  line-height: 1.6;
}

/* Standalone vs integrated — 3 pillars */
.td-model-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 860px) {
  .td-model-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.td-model-card {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(129, 140, 248, 0.22);
  border-radius: var(--td-radius);
  padding: 24px 20px;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.td-model-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--td-blue), var(--td-violet));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.td-model-card:hover {
  transform: translateY(-5px);
  border-color: rgba(165, 180, 252, 0.45);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.td-model-card:hover::after {
  opacity: 1;
}

.td-model-ico {
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 12px;
}
.td-model-card h3 {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 1.02rem;
  font-weight: 800;
  margin: 0 0 10px;
  color: #fff;
  line-height: 1.25;
}
.td-model-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--td-muted);
  line-height: 1.55;
}

/* Bento features */
.td-bento {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .td-bento {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 980px) {
  .td-bento {
    grid-template-columns: repeat(3, 1fr);
  }
  .td-bento .td-tile--wide {
    grid-column: span 2;
  }
}

.td-tile {
  background: var(--td-glass);
  border: 1px solid rgba(129, 140, 248, 0.2);
  border-radius: var(--td-radius);
  padding: 26px 22px;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.3s ease, box-shadow 0.3s ease,
    background 0.3s ease;
  position: relative;
  overflow: hidden;
}
.td-tile::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--td-blue), var(--td-violet), var(--td-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.td-tile:hover {
  transform: translateY(-6px);
  border-color: rgba(165, 180, 252, 0.45);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35), 0 0 40px rgba(99, 102, 241, 0.08);
  background: rgba(30, 27, 75, 0.5);
}
.td-tile:hover::before {
  opacity: 1;
}

.td-tile-ico {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.35), rgba(139, 92, 246, 0.25));
  border: 1px solid rgba(129, 140, 248, 0.3);
  transition: transform 0.3s ease;
}
.td-tile:hover .td-tile-ico {
  transform: scale(1.08) rotate(-3deg);
}

.td-tile h3 {
  font-size: 1.08rem;
  font-weight: 800;
  margin: 0 0 10px;
  color: #fff;
  line-height: 1.25;
}
.td-tile p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--td-muted);
  line-height: 1.55;
}

/* Steps */
.td-steps {
  display: grid;
  gap: 20px;
  counter-reset: tdstep;
}
@media (min-width: 720px) {
  .td-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1100px) {
  .td-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.td-step {
  position: relative;
  padding: 24px 20px 24px 56px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--td-radius-sm);
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.td-step:hover {
  border-color: rgba(129, 140, 248, 0.45);
  transform: translateY(-3px);
}
.td-step::before {
  counter-increment: tdstep;
  content: counter(tdstep);
  position: absolute;
  left: 16px;
  top: 22px;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--td-violet), var(--td-blue-deep));
  color: #fff;
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.td-step h3 {
  font-size: 1rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: #fff;
}
.td-step p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--td-muted);
  line-height: 1.5;
}

/* Stats */
.td-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 8px;
}
@media (max-width: 640px) {
  .td-stats {
    grid-template-columns: 1fr;
  }
}

.td-stat {
  text-align: center;
  padding: 22px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(129, 140, 248, 0.18);
  border-radius: var(--td-radius-sm);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.td-stat:hover {
  transform: translateY(-4px);
  border-color: rgba(165, 180, 252, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}
.td-stat-val {
  font-family: "Plus Jakarta Sans", sans-serif;
  font-weight: 800;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  background: linear-gradient(135deg, #c4b5fd, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.td-stat-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--td-dim);
  margin-top: 10px;
}

/* Pre-paywall CTA strip */
.td-strip {
  padding: clamp(48px, 8vw, 72px) 22px;
  text-align: center;
  background: linear-gradient(135deg, rgba(49, 46, 129, 0.5) 0%, rgba(30, 27, 75, 0.6) 50%, rgba(15, 23, 42, 0.8) 100%);
  border-top: 1px solid rgba(129, 140, 248, 0.2);
  border-bottom: 1px solid rgba(129, 140, 248, 0.2);
}
.td-strip h2 {
  font-size: clamp(1.45rem, 2.8vw, 2rem);
  font-weight: 800;
  margin: 0 0 12px;
  color: #fff;
}
.td-strip p {
  color: var(--td-muted);
  max-width: 28rem;
  margin: 0 auto 22px;
  line-height: 1.55;
}
.td-strip-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* Footer */
.td-footer {
  padding: 32px 22px 40px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--td-dim);
  border-top: 1px solid rgba(129, 140, 248, 0.12);
  background: var(--td-bg0);
}
.td-footer a {
  color: #a5b4fc;
  font-weight: 600;
  text-decoration: none;
}
.td-footer a:hover {
  color: var(--td-cyan);
  text-decoration: underline;
}

/* Scroll reveal */
.td-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.td-reveal.td-reveal--in {
  opacity: 1;
  transform: translateY(0);
}

.td-bento .td-reveal:nth-child(1) {
  transition-delay: 0.04s;
}
.td-bento .td-reveal:nth-child(2) {
  transition-delay: 0.1s;
}
.td-bento .td-reveal:nth-child(3) {
  transition-delay: 0.16s;
}
.td-bento .td-reveal:nth-child(4) {
  transition-delay: 0.22s;
}
.td-bento .td-reveal:nth-child(5) {
  transition-delay: 0.28s;
}

@media (prefers-reduced-motion: reduce) {
  .td-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .td-bento .td-reveal {
    transition-delay: 0s !important;
  }
  .td-btn-primary::before {
    display: none;
  }
  .td-board-stage:hover .td-board {
    transform: none;
  }
}