/* Shared layout for the «Простыми словами» lectures (1600×900). */

.reveal {
  --nut-proton: #e0475b;
  --nut-neutron: #3d63cc;
  --nut-accent: #7cc7ff;
  --nut-warm: #ffcc8a;
}

/* Title slide */
.reveal #title-slide {
  text-align: left;
  padding-top: 150px;
}

.reveal #title-slide .subtitle {
  margin-bottom: 0.5em;
  color: var(--nut-warm);
  font-size: 0.9em;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.reveal #title-slide .title {
  max-width: 1300px;
  font-size: 2.6em;
  line-height: 1.08;
}

.reveal #title-slide .quarto-title-author-name {
  margin-top: 1.4em;
  color: #c9d3da;
  font-size: 0.8em;
}

/* Section question */
.reveal .nut-question {
  margin-top: 1.2em;
  color: var(--nut-accent);
  font-size: 1.35em;
  font-weight: 700;
}

.reveal .nut-lead {
  font-size: 1.12em;
  line-height: 1.3;
}

.reveal .nut-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.reveal .nut-cols.wide-left {
  grid-template-columns: 1.35fr 1fr;
}

.reveal .nut-cols.wide-right {
  grid-template-columns: 1fr 1.35fr;
}

.reveal .nut-figure {
  margin: 0;
  text-align: center;
}

.reveal .nut-figure img,
.reveal .nut-figure video {
  max-width: 100%;
  max-height: 600px;
  margin: 0 auto;
  border-radius: 6px;
}

.reveal .nut-credit {
  margin-top: 8px;
  color: #9fb0bb;
  font-size: 0.42em;
  line-height: 1.3;
  text-align: center;
}

.reveal .nut-credit a {
  color: #9fb0bb;
  text-decoration: underline;
}

/* Quiz chips: what is made of matter? */
.reveal .nut-chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 34px 60px;
  margin-top: 1.2em;
}

.reveal .nut-chip {
  justify-self: start;
  padding: 0.25em 0.8em;
  border: 4px solid transparent;
  border-radius: 999px;
  font-size: 1.15em;
}

.reveal .slides section .nut-chip.fragment {
  opacity: 1;
  visibility: inherit;
}

.reveal .slides section .nut-chip.fragment.visible {
  border-color: var(--nut-warm);
}

/* Periodic table drawn by nutshell.js */
.reveal .pt {
  display: grid;
  grid-template-columns: repeat(18, 1fr);
  grid-template-rows: repeat(7, 1fr) 0.35fr repeat(2, 1fr);
  gap: 3px;
  width: 100%;
  aspect-ratio: 18 / 10.6;
}

.reveal .pt-cell {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  border-radius: 4px;
  color: #10161a;
  line-height: 1;
  text-align: center;
}

.reveal .pt-z {
  font-size: 0.3em;
  opacity: 0.75;
}

.reveal .pt-s {
  font-size: 0.5em;
  font-weight: 700;
}

.reveal .pt-ref {
  font-size: 0.26em;
  font-weight: 700;
}

.reveal .pt-alkali { background: #f28b82; }
.reveal .pt-alkaline { background: #f6b26b; }
.reveal .pt-transition { background: #9fc5e8; }
.reveal .pt-post { background: #b4d6a6; }
.reveal .pt-metalloid { background: #c9c27a; }
.reveal .pt-nonmetal { background: #ffe599; }
.reveal .pt-halogen { background: #d5b8ea; }
.reveal .pt-noble { background: #a8e0dd; }
.reveal .pt-lanthanide { background: #d9c7a7; }
.reveal .pt-actinide { background: #e6b8c9; }

/* Scale ladder */
.reveal .nut-scale {
  display: grid;
  grid-template-columns: 70px 240px 150px 1fr;
  align-items: center;
  row-gap: 18px;
  column-gap: 28px;
  font-size: 0.85em;
}

.reveal .nut-scale svg {
  width: 120px;
  height: 120px;
}

.reveal .nut-scale .size {
  color: var(--nut-warm);
  font-weight: 700;
  white-space: nowrap;
}

.reveal .nut-scale .ruler {
  grid-row: 1 / span 5;
  align-self: stretch;
  width: 34px;
  border-radius: 6px;
  background:
    repeating-linear-gradient(to bottom, #0b3d66 0 3px, transparent 3px 22px),
    linear-gradient(#4aa3ff, #2d7fd6);
}

/* Nucleons and atoms drawn by nutshell.js */
.reveal .nut-nucleus-svg,
.reveal .nut-atom-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.reveal [data-nucleus],
.reveal [data-planetary-atom] {
  margin: 0 auto;
}

.reveal .nut-orbit {
  fill: none;
  stroke: rgb(255 255 255 / 55%);
  stroke-width: 3;
}

.reveal .nut-electron {
  fill: #f2f2e6;
}

.reveal .nut-shell {
  transform-origin: 0 0;
  animation-name: nut-spin;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

@keyframes nut-spin {
  to { transform: rotate(360deg); }
}

.reveal .nut-legend {
  display: flex;
  gap: 26px;
  justify-content: center;
  margin-top: 12px;
}

.reveal .nut-legend span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  color: #ffffff;
  font-size: 0.62em;
  font-weight: 600;
}

.reveal .nut-legend .p { background: radial-gradient(circle at 35% 30%, #ff8a95, var(--nut-proton) 55%, #7a1020); }
.reveal .nut-legend .n { background: radial-gradient(circle at 35% 30%, #8fb0ff, var(--nut-neutron) 55%, #14286b); }

/* Isotopes */
.reveal .nut-isotopes {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 10px 40px;
  align-items: center;
}

.reveal .nut-isotopes [data-nucleus] {
  width: 200px;
  height: 150px;
}

/* Dalton's oxides */
.reveal .nut-dalton {
  display: grid;
  grid-template-columns: repeat(2, 1fr) 260px repeat(2, 1fr);
  gap: 16px 26px;
  align-items: start;
  font-size: 0.62em;
  text-align: center;
}

.reveal .nut-dalton img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 6px;
}

.reveal .nut-dalton .portrait img {
  height: 330px;
}

.reveal .nut-dalton .formula {
  margin-top: 8px;
  color: var(--nut-warm);
  font-size: 1.35em;
  font-weight: 700;
}

.reveal .nut-dalton .count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--nut-proton);
  color: #ffffff;
  font-size: 1.3em;
  font-weight: 700;
}

.reveal .nut-dalton .mass {
  margin-top: 6px;
  color: #dfe6ea;
}

/* Two thinkers facing each other */
.reveal .nut-thinkers {
  display: grid;
  grid-template-columns: 1fr 360px 1fr;
  gap: 40px;
  align-items: center;
  text-align: center;
}

.reveal .nut-thinkers img {
  height: 400px;
  border-radius: 6px;
}

.reveal .nut-thinkers .who {
  margin-top: 6px;
  color: #c9d3da;
  font-size: 0.6em;
}

.reveal .nut-thinkers .quote {
  margin-top: 14px;
  font-size: 0.85em;
  font-style: italic;
}

.reveal .nut-apple svg {
  width: 100%;
  height: 380px;
}

/* Forces between two protons */
.reveal .nut-force {
  display: flex;
  gap: 80px;
  align-items: center;
  justify-content: center;
  margin-top: 30px;
}

.reveal .nut-force .pair {
  text-align: center;
}

.reveal .nut-force .pair .balls {
  display: flex;
  justify-content: center;
}

.reveal .nut-force .pair .balls span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 140px;
  margin: 0 -4px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ff8a95, var(--nut-proton) 55%, #7a1020);
  color: #ffffff;
  font-size: 0.55em;
  font-weight: 600;
}

.reveal .nut-force .arrow {
  color: var(--nut-accent);
  font-size: 1.6em;
  line-height: 1;
}

.reveal .nut-force .weight {
  color: var(--nut-warm);
  font-size: 0.9em;
  text-align: center;
}

.reveal .nut-force .weight strong {
  display: block;
  color: var(--nut-warm);
  font-size: 1.8em;
}

/* Larger text for a general audience */
.reveal .slides section:not(#title-slide) {
  font-size: 1.2em;
}

.reveal #title-slide .quarto-title-authors {
  justify-content: flex-start;
}

.reveal .nut-figure video {
  max-height: 740px;
}

/* Keep long titles clear of the slide number */
.reveal .slides section h2 {
  padding-right: 90px;
}