.presentation-main {
  padding: 1.25rem 0 clamp(4rem, 8vw, 7rem);
}

.db-breadcrumb {
  margin: 0 0 1rem;
}

.db-deck {
  overflow: hidden;
  border: 1px solid rgba(66, 217, 255, .3);
  border-radius: 1.45rem;
  background:
    radial-gradient(circle at 82% 4%, rgba(66, 217, 255, .09), transparent 23rem),
    #081827;
  box-shadow: var(--shadow);
}

.db-deck-header {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 13, 21, .64);
}

.db-deck-identity {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: .8rem;
}

.db-deck-identity > div {
  min-width: 0;
  display: grid;
  line-height: 1.2;
}

.db-deck-identity span:not(.db-deck-mark) {
  color: var(--cyan);
  font: 800 .7rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.db-deck-identity strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .95rem;
}

.db-deck-mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  flex: 0 0 auto;
  border-radius: .75rem;
  color: #07131f;
  background: var(--yellow);
  font: 950 .72rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .04em;
}

.db-deck-actions {
  display: flex;
  gap: .5rem;
}

.db-control-button,
.db-nav-button {
  min-height: 2.65rem;
  padding: .55rem .8rem;
  border: 1px solid var(--line);
  border-radius: .72rem;
  color: var(--ink);
  background: rgba(16, 40, 60, .72);
  font: inherit;
  font-size: .86rem;
  font-weight: 850;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.db-control-button:hover,
.db-nav-button:hover:not(:disabled) {
  border-color: rgba(66, 217, 255, .6);
  background: rgba(20, 52, 77, .95);
  transform: translateY(-1px);
}

.db-progress {
  height: .26rem;
  background: rgba(255, 255, 255, .05);
}

.db-progress span {
  display: block;
  width: 8.333%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--yellow));
  transition: width .3s ease;
}

.db-slide-stage {
  position: relative;
}

.db-slide {
  min-height: clamp(35rem, 66vh, 44rem);
  padding: clamp(1.6rem, 4vw, 3.7rem);
  background:
    linear-gradient(145deg, rgba(16, 40, 60, .28), transparent 56%),
    repeating-linear-gradient(90deg, transparent 0, transparent calc(25% - 1px), rgba(161, 211, 235, .035) 25%);
}

.db-slide[hidden] {
  display: none;
}

.db-slide h1,
.db-slide h2 {
  max-width: 900px;
  margin-bottom: 1rem;
}

.db-slide h1 {
  font-size: clamp(2.65rem, 6vw, 5.7rem);
}

.db-slide h2 {
  font-size: clamp(2.15rem, 4.7vw, 4.2rem);
}

.db-slide h3 {
  letter-spacing: -.025em;
}

.db-slide p,
.db-slide li,
.db-slide dd {
  font-size: clamp(1rem, 1.35vw, 1.13rem);
}

.db-slide code,
.db-slide pre,
.db-keyboard-hint kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.db-slide code {
  color: #dcf7ff;
}

.db-slide-kicker {
  margin: 0 0 1rem;
  color: var(--yellow);
  font: 850 .8rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace !important;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.db-slide-lead,
.db-slide-heading > p:not(.db-slide-kicker) {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
}

.db-slide-heading {
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.db-slide-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(340px, 1.1fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
}

.db-cover-grid {
  min-height: calc(clamp(35rem, 66vh, 44rem) - clamp(3.2rem, 8vw, 7.4rem));
}

.db-objectives {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

.db-objectives li {
  padding: .5rem .75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #cce2ee;
  background: rgba(255, 255, 255, .035);
  font-size: .88rem;
  font-weight: 750;
}

.db-terminal-card,
.db-code-block {
  overflow: hidden;
  border: 1px solid rgba(66, 217, 255, .28);
  border-radius: 1.1rem;
  background: #050d15;
  box-shadow: 0 20px 45px rgba(0, 0, 0, .26);
}

.db-terminal-card {
  transform: rotate(1deg);
}

.db-terminal-card pre,
.db-code-block pre {
  padding: clamp(1.15rem, 3vw, 1.8rem);
  color: #d7f5ff;
  font-size: clamp(.82rem, 1.4vw, 1.05rem);
  line-height: 1.75;
}

.db-query-result {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
}

.db-query-result strong {
  color: var(--green);
}

.db-sql-keyword,
.db-python-keyword {
  color: var(--coral);
  font-weight: 850;
}

.db-sql-function {
  color: var(--yellow);
}

.db-sql-string {
  color: var(--green);
}

.db-three-columns,
.db-constraint-grid,
.db-mutation-grid,
.db-responsibility-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .9rem;
}

.db-concept-card,
.db-constraint-grid article,
.db-mutation-grid article,
.db-responsibility-grid article {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(12, 29, 45, .76);
}

.db-concept-card {
  border-top: 3px solid var(--cyan);
}

.db-concept-problem {
  border-top-color: var(--coral);
}

.db-concept-solution {
  border-top-color: var(--green);
}

.db-card-label {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--cyan);
  font: 800 .74rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.db-concept-problem .db-card-label {
  color: var(--coral);
}

.db-concept-solution .db-card-label {
  color: var(--green);
}

.db-concept-card p,
.db-constraint-grid p,
.db-responsibility-grid p {
  margin: 0;
  color: var(--muted);
}

.db-takeaway,
.db-discussion {
  margin: 1.35rem 0 0;
  padding: .9rem 1rem;
  border-left: 3px solid var(--cyan);
  color: var(--muted);
  background: rgba(66, 217, 255, .05);
}

.db-takeaway strong,
.db-discussion strong {
  color: var(--ink);
}

.db-vocabulary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .6rem;
  margin: 1.5rem 0 0;
}

.db-vocabulary div {
  padding: .75rem;
  border: 1px solid var(--line);
  border-radius: .75rem;
  background: rgba(255, 255, 255, .03);
}

.db-vocabulary dt {
  color: var(--yellow);
  font-weight: 850;
}

.db-vocabulary dd {
  margin: .1rem 0 0;
  color: var(--muted);
  font-size: .88rem;
}

.db-table-demo {
  min-width: 0;
  padding: 1.15rem;
  border: 1px solid rgba(255, 219, 101, .28);
  border-radius: 1.1rem;
  background: rgba(5, 13, 21, .74);
}

.db-schema-line {
  margin: 0 0 1rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9rem !important;
}

.db-schema-line strong {
  color: var(--yellow);
}

.db-table-scroll {
  overflow-x: auto;
}

.db-table-demo table {
  width: 100%;
  border-collapse: collapse;
  white-space: nowrap;
  font-size: .82rem;
}

.db-table-demo th,
.db-table-demo td {
  padding: .7rem .75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.db-table-demo th {
  color: var(--cyan);
  background: rgba(16, 40, 60, .9);
}

.db-table-demo tbody tr:nth-child(2) {
  background: rgba(255, 219, 101, .055);
}

.db-table-legend {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: .85rem;
  color: var(--muted);
  font-size: .76rem;
}

.db-table-legend span {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}

.db-dot {
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  background: var(--cyan);
}

.db-dot-yellow { background: var(--yellow); }
.db-dot-green { background: var(--green); }

.db-schema-map {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: .8rem;
  align-items: center;
}

.db-entity {
  overflow: hidden;
  border: 1px solid rgba(66, 217, 255, .25);
  border-radius: .9rem;
  background: rgba(5, 13, 21, .72);
}

.db-entity h3 {
  margin: 0;
  padding: .75rem .9rem;
  color: #07131f;
  background: var(--cyan);
  font: 900 .88rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .04em;
}

.db-entity:nth-of-type(2) h3 { background: var(--yellow); }
.db-entity:nth-of-type(3) h3 { background: var(--green); }

.db-entity ul {
  margin: 0;
  padding: .6rem .85rem .75rem;
  list-style: none;
}

.db-entity li {
  display: flex;
  justify-content: space-between;
  gap: .5rem;
  padding: .32rem 0;
  border-bottom: 1px solid rgba(161, 211, 235, .09);
  font: 650 .82rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.db-entity li:last-child { border: 0; }
.db-pk { color: var(--cyan); }
.db-fk { color: var(--yellow); }

.db-entity li span {
  color: var(--muted);
  font-size: .68rem;
}

.db-relation-arrow {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: .25rem;
  align-items: center;
  justify-items: center;
  color: var(--yellow);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 850;
}

.db-relation-arrow b { color: var(--cyan); }
.db-relation-arrow small { grid-column: 1 / -1; color: var(--muted); font-weight: 650; }

.db-constraint-symbol {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1rem;
  border-radius: .85rem;
  color: #07131f;
  background: var(--cyan);
  font: 950 .84rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.db-symbol-yellow { background: var(--yellow); }
.db-symbol-green { background: var(--green); }

.db-error-example {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(240px, .65fr);
  gap: 1rem;
  margin-top: 1.2rem;
  padding: 1rem;
  border: 1px solid rgba(255, 123, 114, .32);
  border-radius: .9rem;
  background: rgba(255, 123, 114, .055);
}

.db-error-example div {
  min-width: 0;
  display: grid;
  gap: .4rem;
}

.db-error-example div > span {
  color: var(--coral);
  font-size: .74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.db-error-example code {
  overflow-wrap: anywhere;
  font-size: .8rem;
}

.db-error-example p {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}

.db-error-example strong { color: var(--coral); }

.db-query-questions,
.db-check-list,
.db-activity-steps {
  display: grid;
  gap: .65rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: db-step;
}

.db-query-questions li,
.db-check-list li,
.db-activity-steps li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem .8rem;
  border: 1px solid var(--line);
  border-radius: .75rem;
  background: rgba(255, 255, 255, .03);
}

.db-query-questions code {
  color: var(--yellow);
  font-weight: 850;
}

.db-code-caption {
  display: block;
  padding: .65rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: rgba(16, 40, 60, .64);
  font-size: .76rem;
  font-weight: 750;
}

.db-mini-result {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: .75rem;
  padding: .8rem 1rem;
  border: 1px solid rgba(114, 230, 177, .25);
  border-radius: .8rem;
  color: var(--muted);
  background: rgba(114, 230, 177, .055);
}

.db-mini-result b { color: var(--green); }

.db-aggregate-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
}

.db-command-stack {
  display: grid;
  gap: .65rem;
}

.db-command-stack div {
  display: grid;
  grid-template-columns: 8.2rem 1fr;
  gap: .8rem;
  align-items: center;
  padding: .75rem .85rem;
  border-left: 3px solid var(--cyan);
  background: rgba(255, 255, 255, .035);
}

.db-command-stack div:nth-child(2) { border-color: var(--yellow); }
.db-command-stack div:nth-child(3) { border-color: var(--coral); }
.db-command-stack div:nth-child(4) { border-color: var(--green); }
.db-command-stack code { color: var(--yellow); font-weight: 850; }
.db-command-stack span { color: var(--muted); font-size: .9rem; }

.db-join-demo {
  display: grid;
  grid-template-columns: minmax(300px, .85fr) minmax(0, 1.15fr);
  gap: 1.2rem;
  align-items: stretch;
}

.db-join-visual {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: .55rem;
  align-items: center;
}

.db-join-visual > div {
  display: grid;
  gap: .5rem;
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: .9rem;
  background: rgba(12, 29, 45, .78);
}

.db-join-visual strong { color: var(--cyan); font-size: .78rem; }
.db-join-visual span { color: var(--yellow); font: 700 .76rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.db-join-visual em { color: var(--muted); font-size: .82rem; }
.db-join-visual > b { color: var(--green); font-size: .72rem; white-space: nowrap; }

.db-mutation-grid article {
  display: grid;
  gap: .65rem;
  border-top: 3px solid var(--green);
}

.db-mutation-grid article:nth-child(2) { border-top-color: var(--yellow); }
.db-mutation-grid article:nth-child(3) { border-top-color: var(--coral); }
.db-mutation-grid span { font-weight: 850; }
.db-mutation-grid code { color: var(--muted); font-size: .82rem; line-height: 1.75; }

.db-warning {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: center;
  margin-top: 1.2rem;
  padding: 1rem;
  border: 1px solid rgba(255, 123, 114, .32);
  border-radius: .9rem;
  background: rgba(255, 123, 114, .055);
}

.db-warning strong { color: var(--coral); }
.db-warning span { color: var(--muted); }

.db-check-list li,
.db-activity-steps li {
  justify-content: flex-start;
  color: var(--muted);
}

.db-check-list li::before {
  content: "✓";
  color: var(--green);
  font-weight: 950;
}

.db-activity-steps {
  counter-reset: db-activity;
}

.db-activity-steps li {
  counter-increment: db-activity;
}

.db-activity-steps li::before {
  content: counter(db-activity, decimal-leading-zero);
  flex: 0 0 auto;
  color: var(--yellow);
  font: 850 .78rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.db-python-block pre {
  font-size: clamp(.73rem, 1.15vw, .91rem);
}

.db-responsibility-grid {
  grid-template-columns: repeat(4, 1fr);
}

.db-responsibility-grid article {
  border-top: 3px solid var(--cyan);
}

.db-responsibility-grid article:nth-child(2) { border-top-color: var(--yellow); }
.db-responsibility-grid article:nth-child(3) { border-top-color: var(--green); }
.db-responsibility-grid article:nth-child(4) { border-top-color: var(--coral); }
.db-responsibility-grid article > span { color: var(--cyan); font: 850 .78rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.db-responsibility-grid article:nth-child(2) > span { color: var(--yellow); }
.db-responsibility-grid article:nth-child(3) > span { color: var(--green); }
.db-responsibility-grid article:nth-child(4) > span { color: var(--coral); }

.db-discussion {
  border-left-color: var(--yellow);
  background: rgba(255, 219, 101, .05);
}

.db-resource-panel {
  display: grid;
  gap: .7rem;
  padding: 1.2rem;
  border: 1px solid rgba(255, 219, 101, .34);
  border-radius: 1.05rem;
  background: linear-gradient(145deg, rgba(255, 219, 101, .075), rgba(66, 217, 255, .045));
}

.db-resource-panel > p {
  margin: 0 .15rem .2rem;
  color: var(--yellow);
  font: 850 .76rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.db-resource-panel a {
  display: block;
  padding: .8rem .9rem;
  border: 1px solid var(--line);
  border-radius: .75rem;
  color: var(--ink);
  background: rgba(5, 13, 21, .56);
  text-decoration: none;
  font-weight: 800;
  transition: border-color .18s ease, transform .18s ease;
}

.db-resource-panel a:hover {
  transform: translateX(.2rem);
  border-color: rgba(66, 217, 255, .6);
}

.db-resource-panel .db-resource-primary {
  color: #07131f;
  background: var(--cyan);
}

.db-resource-primary span,
.db-resource-primary strong {
  display: block;
}

.db-resource-primary span {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.db-resource-panel small {
  padding: .25rem .2rem 0;
  color: var(--muted);
  font-size: .76rem;
}

.db-deck-controls {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 1rem;
  align-items: center;
  padding: .9rem 1rem;
  border-top: 1px solid var(--line);
  background: rgba(5, 13, 21, .7);
}

.db-nav-next {
  color: #07131f;
  border-color: transparent;
  background: var(--cyan);
}

.db-nav-next:hover:not(:disabled) {
  background: #7be5ff;
}

.db-nav-button:disabled {
  opacity: .38;
  cursor: not-allowed;
}

.db-pagination {
  display: flex;
  justify-content: center;
  gap: .34rem;
}

.db-pagination button {
  width: .62rem;
  height: .62rem;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(169, 190, 208, .34);
  cursor: pointer;
  transition: width .2s ease, background .2s ease;
}

.db-pagination button[aria-current="step"] {
  width: 1.75rem;
  background: var(--yellow);
}

.db-counter {
  min-width: 3.4rem;
  margin: 0;
  color: var(--muted);
  font: 800 .8rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-align: center;
}

.db-keyboard-hint {
  margin: 0;
  padding: .55rem 1rem .8rem;
  color: #7993a5;
  background: rgba(5, 13, 21, .7);
  font-size: .72rem;
  text-align: center;
}

.db-keyboard-hint kbd {
  padding: .08rem .32rem;
  border: 1px solid var(--line);
  border-radius: .3rem;
  color: var(--muted);
  background: rgba(255, 255, 255, .04);
}

.db-noscript {
  margin: 1rem 0;
  color: var(--muted);
}

.db-deck:fullscreen {
  display: flex;
  flex-direction: column;
  border: 0;
  border-radius: 0;
  background: #07131f;
}

.db-deck:fullscreen .db-slide-stage {
  min-height: 0;
  flex: 1;
  overflow: hidden;
}

.db-deck:fullscreen .db-slide {
  height: 100%;
  min-height: 0;
  overflow-y: auto;
}

.db-deck:fullscreen .db-keyboard-hint {
  padding-bottom: .55rem;
}

/* Cours ITC : même lecteur que la présentation de Terminale, avec une
   typographie plus dense pour conserver le cours, les exercices et les corrigés. */
.itc-deck .db-slide {
  min-height: clamp(38rem, 70vh, 48rem);
}

.itc-slide > h1 {
  max-width: 100%;
  margin-bottom: 1.2rem;
  font-size: clamp(2rem, 4.3vw, 3.35rem);
}

.itc-slide > h2,
.itc-slide h2 {
  max-width: 100%;
  margin: 1.25rem 0 .65rem;
  font-size: clamp(1.45rem, 2.8vw, 2.15rem);
}

.itc-slide h3 {
  margin: 1.25rem 0 .45rem;
  color: var(--yellow);
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  letter-spacing: -.02em;
}

.itc-slide p,
.itc-slide li,
.itc-slide td,
.itc-slide th {
  font-size: clamp(.92rem, 1.15vw, 1.02rem);
  line-height: 1.55;
}

.itc-slide p {
  margin: .65rem 0;
}

.itc-slide ul,
.itc-slide ol {
  margin: .55rem 0 .9rem;
  padding-left: 1.4rem;
}

.itc-slide li + li {
  margin-top: .3rem;
}

.itc-slide a {
  color: var(--cyan);
  text-underline-offset: .18em;
}

.itc-cover-slide {
  background:
    radial-gradient(circle at 80% 18%, rgba(255, 219, 101, .13), transparent 19rem),
    radial-gradient(circle at 18% 82%, rgba(66, 217, 255, .13), transparent 23rem),
    #081725;
}

.itc-cover-slide > h1 {
  max-width: 900px;
  font-size: clamp(2.7rem, 6vw, 5.3rem);
}

.itc-cover-slide > h2 {
  margin-top: 0;
  color: var(--yellow);
}

.itc-cover-slide > p {
  max-width: 880px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.itc-slide pre {
  position: relative;
  margin: .8rem 0 1rem;
  padding: 2.25rem 1rem 1rem;
  overflow-x: auto;
  border: 1px solid rgba(66, 217, 255, .26);
  border-radius: .85rem;
  color: #d7f5ff;
  background: #050d15;
  box-shadow: inset 0 1px rgba(255, 255, 255, .025);
  font-size: clamp(.78rem, 1.05vw, .92rem);
  line-height: 1.55;
}

.itc-slide pre::before {
  position: absolute;
  top: .55rem;
  left: 1rem;
  color: var(--cyan);
  font: 850 .68rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: .08em;
}

.itc-slide pre.sql::before {
  content: "SQL";
}

.itc-slide pre.text::before {
  content: "REPÈRE";
  color: var(--yellow);
}

.itc-slide :not(pre) > code {
  padding: .08rem .32rem;
  border: 1px solid rgba(66, 217, 255, .18);
  border-radius: .3rem;
  background: rgba(66, 217, 255, .07);
  font-size: .9em;
}

.itc-slide table {
  width: 100%;
  margin: .8rem 0 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-spacing: 0;
  border-collapse: separate;
  border-radius: .8rem;
  background: rgba(5, 13, 21, .42);
}

.itc-slide th,
.itc-slide td {
  padding: .55rem .7rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.itc-slide th:last-child,
.itc-slide td:last-child {
  border-right: 0;
}

.itc-slide tbody tr:last-child td {
  border-bottom: 0;
}

.itc-slide th {
  color: #07131f;
  background: var(--cyan);
  font-weight: 900;
}

.itc-slide th:first-child {
  border-top-left-radius: .7rem;
}

.itc-slide th:last-child {
  border-top-right-radius: .7rem;
}

.itc-slide tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, .035);
}

.itc-slide h3[id*="-application-"],
.itc-exercise-slide h3 {
  margin-top: 1.35rem;
  padding: .65rem .8rem;
  border-left: .28rem solid var(--yellow);
  border-radius: .45rem;
  color: var(--ink);
  background: rgba(255, 219, 101, .08);
}

.itc-exercise-slide {
  background:
    radial-gradient(circle at 95% 10%, rgba(255, 219, 101, .08), transparent 20rem),
    linear-gradient(145deg, rgba(16, 40, 60, .22), transparent 58%);
}

.itc-correction-slide {
  background:
    radial-gradient(circle at 95% 10%, rgba(114, 230, 177, .09), transparent 20rem),
    linear-gradient(145deg, rgba(16, 40, 60, .22), transparent 58%);
}

.itc-correction-slide .db-slide-kicker,
.itc-correction-slide h3 {
  color: var(--green);
}

.itc-correction-slide h3 {
  padding-bottom: .35rem;
  border-bottom: 1px solid rgba(114, 230, 177, .22);
}

.itc-correction-banner {
  margin: 0 0 1.25rem !important;
  padding: .9rem 1rem;
  border: 1px solid rgba(114, 230, 177, .32);
  border-left: .3rem solid var(--green);
  border-radius: .7rem;
  color: #c9f5df !important;
  background: rgba(114, 230, 177, .08);
}

.itc-resource-panel {
  max-width: 760px;
  margin-top: 1.5rem;
}

@media (max-width: 900px) {
  .db-slide-grid,
  .db-aggregate-grid,
  .db-join-demo {
    grid-template-columns: 1fr;
  }

  .db-three-columns,
  .db-constraint-grid,
  .db-mutation-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .db-responsibility-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .db-schema-map {
    grid-template-columns: 1fr;
  }

  .db-relation-arrow {
    grid-template-columns: auto auto auto;
    justify-content: start;
    padding-left: 1rem;
  }

  .db-relation-arrow b {
    transform: rotate(90deg);
  }

  .db-slide {
    min-height: 0;
  }

  .db-cover-grid {
    min-height: 0;
  }

  .itc-deck .db-slide {
    min-height: 0;
  }
}

@media (max-width: 620px) {
  .presentation-main { padding-top: .75rem; }
  .db-breadcrumb { overflow-x: auto; white-space: nowrap; }
  .db-deck-header { align-items: flex-start; }
  .db-deck-identity strong { max-width: 12rem; }
  .db-deck-actions { flex-direction: column; }
  .db-control-button { min-height: 2.2rem; padding: .35rem .55rem; font-size: .72rem; }
  .db-slide { padding: 1.3rem 1rem 1.6rem; background: linear-gradient(145deg, rgba(16, 40, 60, .28), transparent 56%); }
  .db-slide h1 { font-size: clamp(2.35rem, 13vw, 3.6rem); }
  .db-slide h2 { font-size: clamp(2rem, 10vw, 3rem); }
  .db-terminal-card { transform: none; }
  .db-three-columns,
  .db-constraint-grid,
  .db-mutation-grid,
  .db-responsibility-grid,
  .db-error-example {
    grid-template-columns: 1fr;
  }
  .db-vocabulary { grid-template-columns: 1fr; }
  .db-join-visual { grid-template-columns: 1fr; }
  .db-join-visual > b { text-align: center; }
  .db-warning { grid-template-columns: 1fr; }
  .db-command-stack div { grid-template-columns: 1fr; gap: .2rem; }
  .db-deck-controls { grid-template-columns: 1fr auto 1fr; gap: .5rem; }
  .db-pagination { display: none; }
  .db-nav-button { padding-inline: .6rem; font-size: .75rem; }
  .db-counter { min-width: 3rem; }
  .itc-slide table { display: block; white-space: nowrap; }
  .itc-slide th, .itc-slide td { min-width: 7rem; }
  .itc-slide > h1 { font-size: clamp(1.85rem, 9vw, 2.75rem); }
}

@media (prefers-reduced-motion: reduce) {
  .db-progress span,
  .db-pagination button,
  .db-control-button,
  .db-nav-button,
  .db-resource-panel a {
    transition: none;
  }
}

@media print {
  .site-header,
  .site-footer,
  .db-breadcrumb,
  .db-deck-header,
  .db-progress,
  .db-deck-controls,
  .db-keyboard-hint {
    display: none !important;
  }

  body {
    color: #111827;
    background: white;
  }

  .presentation-main { padding: 0; }
  .container { width: 100%; }
  .db-deck { overflow: visible; border: 0; box-shadow: none; background: white; }
  .db-slide[hidden] { display: block !important; }
  .db-slide {
    min-height: 100vh;
    break-after: page;
    color: #111827;
    background: white;
  }
  .db-slide:last-child { break-after: auto; }
  .db-slide p,
  .db-slide li,
  .db-slide dd,
  .db-slide-lead,
  .db-slide-heading > p:not(.db-slide-kicker) { color: #334155; }
  .db-concept-card,
  .db-constraint-grid article,
  .db-mutation-grid article,
  .db-responsibility-grid article,
  .db-table-demo,
  .db-entity,
  .db-resource-panel { background: #f8fafc; }
  .itc-slide pre { color: #0f172a; background: #f8fafc; }
  .itc-slide table { color: #111827; background: white; }
  .itc-slide th { color: #111827; background: #dbeafe; }
  .itc-correction-banner { color: #14532d !important; background: #f0fdf4; }
}