:root {
  --deck-bg: #f4f7f6;
  --deck-ink: #12202a;
  --deck-muted: #607080;
  --deck-line: #d7e2df;
  --deck-panel: #ffffff;
  --deck-green: #0b6b5f;
  --deck-blue: #245c8f;
  --deck-red: #be3a32;
  --deck-gold: #efc45b;
  --deck-soft-green: #e4f3ef;
  --deck-soft-blue: #e8f1fa;
  --deck-soft-red: #f9e9e7;
  --deck-soft-gold: #fff6dd;
  --deck-shadow: 0 18px 42px rgba(18, 32, 42, .13);
}

* { box-sizing: border-box; }

html,
body {
  margin: 0;
  min-height: 100%;
}

body.presentation-body {
  min-height: 100dvh;
  overflow: auto;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--deck-ink);
  background:
    linear-gradient(90deg, rgba(11, 107, 95, .08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(11, 107, 95, .07) 1px, transparent 1px),
    var(--deck-bg);
  background-size: 44px 44px;
}

.presentation-intro {
  min-height: 100dvh;
  display: grid;
  align-content: center;
  gap: 34px;
  padding: 36px 42px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .96), rgba(228, 243, 239, .8)),
    var(--deck-bg);
}

.intro-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  width: min(100%, 1180px);
  margin: 0 auto;
}

.intro-brand img {
  width: 310px;
  height: auto;
  object-fit: contain;
}

.intro-brand span {
  border-left: 1px solid var(--deck-line);
  padding-left: 16px;
  color: var(--deck-muted);
  font-size: 15px;
  font-weight: 850;
}

.intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 28px;
  align-items: stretch;
  width: min(100%, 1180px);
  margin: 0 auto;
}

.intro-kicker {
  margin: 0 0 14px;
  color: var(--deck-green);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.presentation-intro h1 {
  max-width: 760px;
  margin: 0;
  color: var(--deck-ink);
  font-size: 58px;
  line-height: 1.02;
  letter-spacing: 0;
}

.intro-lead {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--deck-muted);
  font-size: 22px;
  line-height: 1.35;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.intro-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--deck-green);
  border-radius: 8px;
  padding: 10px 14px;
  background: #fff;
  color: var(--deck-green);
  font-size: 15px;
  font-weight: 850;
  text-decoration: none;
}

.intro-button.primary {
  background: var(--deck-green);
  color: #fff;
}

.teacher-brief {
  border: 1px solid var(--deck-line);
  border-radius: 8px;
  padding: 22px;
  background: #fff;
  box-shadow: var(--deck-shadow);
}

.teacher-brief h2 {
  margin: 0 0 14px;
  color: var(--deck-green);
  font-size: 24px;
  line-height: 1.15;
}

.teacher-brief ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
  color: var(--deck-ink);
  font-size: 17px;
  line-height: 1.42;
}

a { color: inherit; }

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(36, 92, 143, .3);
  outline-offset: 3px;
}

.deck-shell {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100dvh;
  min-height: 760px;
  background: rgba(244, 247, 246, .92);
}

.deck-topbar {
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 76px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--deck-line);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
}

.deck-brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  color: var(--deck-ink);
  text-decoration: none;
}

.deck-brand img {
  width: 260px;
  height: auto;
  max-height: 46px;
  object-fit: contain;
  object-position: left center;
}

.deck-brand span {
  display: block;
  min-width: 0;
  border-left: 1px solid var(--deck-line);
  padding-left: 14px;
  font-size: 15px;
  font-weight: 850;
  line-height: 1.15;
}

.deck-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.deck-button,
.deck-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--deck-line);
  border-radius: 8px;
  padding: 8px 12px;
  background: #fff;
  color: var(--deck-ink);
  font: inherit;
  font-size: 14px;
  font-weight: 850;
  text-decoration: none;
  cursor: pointer;
}

.deck-button:hover,
.deck-link-button:hover {
  border-color: var(--deck-green);
  background: var(--deck-soft-green);
}

.deck-button:active,
.deck-link-button:active {
  transform: translateY(1px);
}

.deck-button.primary {
  border-color: var(--deck-green);
  background: var(--deck-green);
  color: #fff;
}

.deck-button.primary:hover {
  background: #08564d;
}

.slide-counter {
  min-width: 72px;
  color: var(--deck-muted);
  font-size: 14px;
  font-weight: 800;
  text-align: center;
}

.deck-stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
  padding: 30px 34px 24px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(28px);
  transition: opacity .24s ease, transform .24s ease;
}

.slide.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.slide-main {
  position: relative;
  display: grid;
  align-content: center;
  min-width: 0;
  padding: 34px 42px;
  border: 1px solid var(--deck-line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(255, 255, 255, .88)),
    linear-gradient(120deg, rgba(11, 107, 95, .12), rgba(36, 92, 143, .08));
  box-shadow: var(--deck-shadow);
  overflow: hidden;
}

.slide-main::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 10px;
  background: var(--slide-accent, var(--deck-green));
}

.slide-main::after {
  content: attr(data-number);
  position: absolute;
  right: 24px;
  bottom: 18px;
  color: rgba(18, 32, 42, .08);
  font-size: 96px;
  font-weight: 950;
  line-height: 1;
}

.slide[data-tone="blue"] { --slide-accent: var(--deck-blue); }
.slide[data-tone="red"] { --slide-accent: var(--deck-red); }
.slide[data-tone="gold"] { --slide-accent: var(--deck-gold); }

.slide-kicker {
  margin: 0 0 12px;
  color: var(--slide-accent, var(--deck-green));
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.slide h1 {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0;
  font-size: 56px;
  line-height: 1.02;
  letter-spacing: 0;
}

.slide h2 {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0;
  font-size: 44px;
  line-height: 1.06;
  letter-spacing: 0;
}

.slide-lead {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--deck-muted);
  font-size: 22px;
  line-height: 1.35;
}

.message-list,
.check-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  max-width: 920px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.check-list {
  gap: 10px;
}

.message-list li,
.check-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  min-height: 52px;
  border: 1px solid rgba(215, 226, 223, .95);
  border-radius: 8px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, .82);
  font-size: 22px;
  line-height: 1.25;
  box-shadow: 0 8px 18px rgba(18, 32, 42, .05);
}

.check-list li {
  min-height: 48px;
  padding: 10px 14px;
  font-size: 21px;
}

.message-list li::before,
.check-list li::before {
  content: "";
  width: 12px;
  height: 12px;
  margin-top: 8px;
  border-radius: 3px;
  background: var(--slide-accent, var(--deck-green));
}

.statute-quote {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 22px 0 0;
  border: 1px solid rgba(190, 58, 50, .28);
  border-left: 8px solid var(--slide-accent, var(--deck-red));
  border-radius: 8px;
  padding: 16px 18px;
  background: rgba(249, 233, 231, .92);
  box-shadow: 0 10px 20px rgba(18, 32, 42, .06);
}

.statute-quote strong {
  display: block;
  margin-bottom: 7px;
  color: var(--deck-red);
  font-size: 18px;
  line-height: 1.2;
}

.statute-quote span {
  display: block;
  color: var(--deck-ink);
  font-size: 20px;
  line-height: 1.35;
}

.compact-grid,
.date-grid,
.link-grid,
.support-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.compact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.phone-rules {
  margin-top: 18px;
}

.phone-list {
  gap: 9px;
  margin-top: 18px;
}

.phone-list li {
  min-height: 44px;
  padding: 10px 14px;
  font-size: 19px;
}

.date-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.support-grid,
.link-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-tile,
.date-tile,
.web-link {
  min-width: 0;
  border: 1px solid var(--deck-line);
  border-radius: 8px;
  padding: 16px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 10px 20px rgba(18, 32, 42, .06);
}

.info-tile strong,
.date-tile strong,
.web-link strong {
  display: block;
  color: var(--deck-ink);
  font-size: 21px;
  line-height: 1.12;
}

.info-tile span,
.date-tile span,
.web-link span {
  display: block;
  margin-top: 7px;
  color: var(--deck-muted);
  font-size: 16px;
  line-height: 1.32;
}

.date-tile strong {
  color: var(--slide-accent, var(--deck-green));
  font-size: 19px;
}

.web-link {
  position: relative;
  color: var(--deck-ink);
  text-decoration: none;
}

.web-link::after {
  content: "WWW";
  position: absolute;
  top: 12px;
  right: 12px;
  border: 1px solid rgba(11, 107, 95, .26);
  border-radius: 6px;
  padding: 3px 6px;
  color: var(--deck-green);
  background: var(--deck-soft-green);
  font-size: 12px;
  font-weight: 900;
}

.web-link:hover {
  border-color: var(--deck-green);
  background: var(--deck-soft-green);
}

.help-ladder {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  max-width: 960px;
  margin-top: 22px;
  counter-reset: ladder;
}

.ladder-step {
  position: relative;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  column-gap: 16px;
  align-items: center;
  min-width: 0;
  border: 1px solid var(--deck-line);
  border-radius: 8px;
  padding: 11px 16px;
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 10px 20px rgba(18, 32, 42, .06);
  counter-increment: ladder;
}

.ladder-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 42px;
  bottom: -9px;
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: var(--slide-accent, var(--deck-blue));
}

.ladder-step::before {
  content: counter(ladder);
  display: inline-grid;
  place-items: center;
  grid-row: 1 / span 2;
  width: 42px;
  height: 42px;
  margin: 0;
  border-radius: 8px;
  background: var(--slide-accent, var(--deck-blue));
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}

.ladder-step strong,
.ladder-step span {
  display: block;
}

.ladder-step strong {
  color: var(--deck-ink);
  font-size: 22px;
  line-height: 1.1;
}

.ladder-step span {
  margin-top: 5px;
  color: var(--deck-muted);
  font-size: 17px;
  line-height: 1.34;
}

.slide-note {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 16px 0 0;
  border-left: 6px solid var(--slide-accent, var(--deck-blue));
  border-radius: 8px;
  padding: 12px 16px;
  background: rgba(232, 241, 250, .9);
  color: var(--deck-ink);
  font-size: 18px;
  font-weight: 750;
  line-height: 1.3;
}

.speaker-notes-source {
  display: none;
}

.deck-footer {
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 10px 22px 14px;
  border-top: 1px solid var(--deck-line);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(12px);
}

.progress-wrap {
  display: grid;
  gap: 8px;
}

.progress-bar {
  height: 7px;
  border-radius: 999px;
  background: #dfe8e5;
  overflow: hidden;
}

.progress-fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--deck-green);
  transition: width .2s ease;
}

.slide-dots {
  display: flex;
  gap: 5px;
  overflow: hidden;
}

.slide-dot {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 3px;
  padding: 0;
  background: #c9d6d2;
  cursor: pointer;
}

.slide-dot.is-active {
  width: 28px;
  background: var(--deck-green);
}

.hint {
  margin: 0;
  color: var(--deck-muted);
  font-size: 13px;
  font-weight: 750;
  white-space: nowrap;
}

@media (max-width: 1180px) {
  .slide {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px;
  }

  .slide-main {
    padding: 28px 32px;
  }

  .slide h1 {
    font-size: 46px;
  }

  .slide h2 {
    font-size: 38px;
  }

  .message-list li,
  .check-list li {
    font-size: 19px;
  }

  .phone-list li {
    font-size: 18px;
  }

  .date-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-height: 700px) and (min-width: 700px) {
  .deck-shell {
    height: 100dvh;
    min-height: 0;
  }

  .deck-topbar {
    min-height: 58px;
    padding: 7px 14px;
  }

  .deck-brand img {
    width: 190px;
    max-height: 36px;
  }

  .deck-brand span {
    font-size: 12px;
  }

  .deck-button,
  .deck-link-button {
    min-height: 34px;
    padding: 6px 9px;
    font-size: 12px;
  }

  .slide-counter {
    min-width: 58px;
    font-size: 12px;
  }

  .deck-stage {
    min-height: 0;
  }

  .slide {
    padding: 14px 18px 10px;
  }

  .slide-main {
    align-content: center;
    padding: 20px 26px 22px;
  }

  .slide-main::after {
    right: 16px;
    bottom: 12px;
    font-size: 64px;
  }

  .slide h1 {
    font-size: 38px;
  }

  .slide h2 {
    max-width: 760px;
    font-size: 30px;
  }

  .slide-lead {
    font-size: 17px;
  }

  .message-list,
  .check-list,
  .compact-grid,
  .date-grid,
  .link-grid,
  .support-grid {
    gap: 8px;
    margin-top: 16px;
  }

  .message-list li,
  .check-list li {
    min-height: 38px;
    padding: 8px 10px;
    font-size: 16px;
  }

  .statute-quote {
    margin-top: 14px;
    padding: 10px 12px;
  }

  .statute-quote strong {
    margin-bottom: 3px;
    font-size: 14px;
  }

  .statute-quote span {
    font-size: 15px;
    line-height: 1.25;
  }

  .compact-grid,
  .date-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .link-grid,
  .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .date-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .info-tile,
  .date-tile,
  .web-link {
    padding: 10px;
  }

  .info-tile strong,
  .date-tile strong,
  .web-link strong {
    font-size: 16px;
  }

  .info-tile span,
  .date-tile span,
  .web-link span {
    margin-top: 4px;
    font-size: 13px;
  }

  .help-ladder {
    gap: 8px;
    margin-top: 16px;
  }

  .ladder-step {
    grid-template-columns: 40px minmax(0, 1fr);
    column-gap: 10px;
    padding: 8px 10px;
  }

  .ladder-step:not(:last-child)::after {
    left: 28px;
    bottom: -9px;
    width: 3px;
    height: 8px;
  }

  .ladder-step::before {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

  .ladder-step strong {
    font-size: 16px;
  }

  .ladder-step span {
    margin-top: 3px;
    font-size: 13px;
    line-height: 1.25;
  }

  .slide-note {
    margin-top: 14px;
    padding: 10px 12px;
    font-size: 16px;
  }

  .date-tile strong {
    font-size: 15px;
  }

  .deck-footer {
    padding: 7px 14px;
  }

  .hint {
    display: none;
  }
}

@media (max-width: 900px) {
  body.presentation-body {
    overflow: auto;
  }

  .deck-shell {
    min-height: 100dvh;
    height: auto;
  }

  .deck-topbar,
  .deck-footer {
    position: sticky;
    background: rgba(255, 255, 255, .96);
  }

  .deck-topbar {
    top: 0;
    grid-template-columns: 1fr;
  }

  .deck-controls {
    flex-wrap: wrap;
  }

  .deck-stage {
    min-height: 720px;
  }

  .slide {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .slide-main {
    align-content: start;
  }

  .compact-grid,
  .support-grid,
  .link-grid,
  .help-ladder {
    grid-template-columns: 1fr;
  }

  .deck-footer {
    bottom: 0;
    grid-template-columns: 1fr;
  }

  .hint {
    white-space: normal;
  }
}

@media (max-width: 620px) {
  .presentation-intro {
    padding: 24px 18px;
  }

  .intro-brand,
  .intro-layout {
    grid-template-columns: 1fr;
  }

  .intro-brand {
    align-items: flex-start;
    flex-direction: column;
  }

  .intro-brand img {
    width: 230px;
  }

  .intro-brand span {
    border-left: 0;
    padding-left: 0;
  }

  .presentation-intro h1 {
    font-size: 38px;
  }

  .intro-lead {
    font-size: 18px;
  }

  .deck-brand {
    align-items: flex-start;
  }

  .deck-brand img {
    width: 190px;
  }

  .deck-brand span {
    border-left: 0;
    padding-left: 0;
  }

  .slide {
    position: relative;
    display: none;
    padding: 14px;
    opacity: 1;
    pointer-events: none;
    transform: none;
    transition: none;
  }

  .slide.is-active {
    display: grid;
    pointer-events: auto;
  }

  .slide-main {
    overflow: visible;
    padding: 22px 20px 28px;
  }

  .slide h1 {
    font-size: 34px;
  }

  .slide h2 {
    font-size: 29px;
  }

  .slide-lead {
    font-size: 18px;
  }

  .message-list li,
  .check-list li {
    font-size: 17px;
  }

  .statute-quote span {
    font-size: 17px;
  }

  .phone-list li {
    font-size: 16px;
  }

  .date-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-height: 700px) and (min-width: 700px) {
  .deck-shell {
    height: 100dvh;
    min-height: 0;
  }

  .deck-topbar {
    min-height: 58px;
    padding: 7px 14px;
  }

  .deck-brand img {
    width: 190px;
    max-height: 36px;
  }

  .deck-brand span {
    border-left: 1px solid var(--deck-line);
    padding-left: 10px;
    font-size: 12px;
  }

  .deck-button,
  .deck-link-button {
    min-height: 34px;
    padding: 6px 9px;
    font-size: 12px;
  }

  .slide-counter {
    min-width: 58px;
    font-size: 12px;
  }

  .deck-stage {
    min-height: 0;
  }

  .slide {
    padding: 14px 18px 10px;
  }

  .slide-main {
    align-content: center;
    padding: 20px 26px 22px;
  }

  .slide-main::after {
    right: 16px;
    bottom: 12px;
    font-size: 64px;
  }

  .slide h1 {
    font-size: 38px;
  }

  .slide h2 {
    max-width: 760px;
    font-size: 30px;
  }

  .slide-lead {
    font-size: 17px;
  }

  .message-list,
  .check-list,
  .compact-grid,
  .date-grid,
  .link-grid,
  .support-grid {
    gap: 8px;
    margin-top: 16px;
  }

  .message-list li,
  .check-list li {
    min-height: 38px;
    padding: 8px 10px;
    font-size: 16px;
  }

  .statute-quote {
    margin-top: 14px;
    padding: 10px 12px;
  }

  .statute-quote strong {
    margin-bottom: 3px;
    font-size: 14px;
  }

  .statute-quote span {
    font-size: 15px;
    line-height: 1.25;
  }

  .compact-grid,
  .phone-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .date-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .link-grid,
  .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-tile,
  .date-tile,
  .web-link {
    padding: 10px;
  }

  .info-tile strong,
  .date-tile strong,
  .web-link strong {
    font-size: 16px;
  }

  .info-tile span,
  .date-tile span,
  .web-link span {
    margin-top: 4px;
    font-size: 13px;
  }

  .date-tile strong {
    font-size: 15px;
  }

  .deck-footer {
    padding: 7px 14px;
  }

  .hint {
    display: none;
  }
}