* {
  box-sizing: border-box
}
body {
  margin: 0;
  background: #172c38;
  color: #f0f7fa;
  font: 16px 'Fira Sans',sans-serif
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 25px;
  padding: 30px 40px
}
.logo {
  font: 500 29px Tektur
}
.logo span {
  display: block;
  font: 16px 'Fira Sans';
  margin-top: 8px
}
h1 {
  font: 400 31px/1.2 Tektur;
  margin: 0
}
header p {
  line-height: 1.5
}
main {
  display: grid;
  grid-template-columns: repeat(5,minmax(0,1fr));
  gap: 22px;
  padding: 0 40px
}
.phase {
  margin: 0 0 14px;
  color: #adc4ce
}
article {
  height: 708px;
  background: #203b49;
  border: 1px solid #55717f;
  border-radius: 14px;
  padding: 21px 24px;
  display: flex;
  flex-direction: column;
  scroll-margin: 20px
}
.status {
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 27px
}
h2 {
  font: 500 29px/1.16 Tektur;
  margin: 0 0 25px
}
p {
  line-height: 1.45
}
.facility {
  font-size: 14px;
  color: #adc4ce;
  margin: 0 0 20px
}
button {
  font: 500 16px 'Fira Sans';
  border: 0;
  border-radius: 5px;
  min-height: 48px;
  padding: 13px;
  background: #8ed3e0;
  color: #172c38;
  cursor: pointer
}
button:focus-visible,textarea:focus-visible {
  outline: 3px solid white;
  outline-offset: 3px
}
article>button:last-of-type {
  margin-top: auto
}
.diagram {
  width: 100%;
  height: 218px;
  margin: 0 auto 12px
}
.route {
  list-style: none;
  padding: 0;
  margin: 10px 0 28px
}
.route li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid #55717f
}
.route span {
  font: 500 30px Tektur;
  color: #8ed3e0
}
.route p {
  font-size: 14px;
  color: #adc4ce;
  margin: 8px 0 0
}
.hint {
  font-size: 14px;
  color: #c1d4dd
}
.checkrow {
  border-bottom: 1px solid #55717f;
  padding: 0 0 19px;
  margin-bottom: 17px
}
.checkrow p {
  margin: 0 0 12px;
  font-size: 18px
}
.choices {
  display: flex;
  gap: 10px
}
.choices button {
  flex: 1;
  background: #365362;
  color: white;
  border: 1px solid #6a8b9a;
  padding: 10px
}
.choices [aria-pressed=true] {
  background: #8ed3e0;
  color: #172c38
}
.choices [data-value=fault][aria-pressed=true] {
  background: #f0f7fa;
  color: #172c38;
  border: 2px solid #8ed3e0
}
.warning {
  padding: 18px;
  border-left: 4px solid #8ed3e0;
  background: #365362;
  margin: 8px 0 25px
}
.warning p {
  margin-bottom: 0
}
label {
  display: block
}
textarea {
  display: block;
  width: 100%;
  height: 120px;
  background: #172c38;
  color: #f0f7fa;
  border: 1px solid #adc4ce;
  border-radius: 4px;
  padding: 12px;
  font: 16px 'Fira Sans';
  margin-top: 10px;
  resize: vertical
}
textarea::placeholder {
  color: #adc4ce
}
#description-error {
  font-size: 14px;
  color: #c9e7ef;
  min-height: 40px
}
.result {
  background: #294958
}
.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  border-block: 1px solid #6a8b9a;
  padding: 25px 0;
  margin: 15px 0 25px
}
.metrics b {
  font: 500 44px Tektur;
  display: block;
  color: #8ed3e0
}
.metrics span {
  font-size: 14px;
  display: block;
  margin-top: 10px
}
.log {
  border-left: 2px solid #8ed3e0;
  padding: 5px 0 5px 16px
}
.log p {
  overflow-wrap: anywhere
}
.secondary {
  background: #365362;
  color: white
}
small {
  font-size: 14px;
  margin-top: 14px
}
footer {
  font-size: 14px;
  color: #adc4ce;
  padding: 24px 40px
}
@media(max-width:1000px) {
  header {
    padding: 25px 20px;
    flex-wrap: wrap;
    align-items: flex-start
  }
  h1 {
    font-size: 25px
  }
  main {
    display: flex;
    flex-direction: column;
    padding: 0 20px;
    gap: 28px
  }
  article,.phase {
    max-width: 430px;
    margin-left: auto;
    margin-right: auto
  }
  article {
    width: 100%
  }
  footer {
    padding: 24px 20px
  }
}
.result .metrics {
  margin: 15px 0 18px;
  padding: 20px 0
}

@media (min-width: 1001px) and (max-width: 1800px) {
  main {
    grid-template-columns: repeat(2, minmax(0, 430px));
    justify-content: center;
  }
}

/* Task 12: complete screens. */
@media(min-width:1001px){header{height:130px;padding:20px 40px;gap:24px}header h1{font-size:30px}header p{font-size:14px}main.flow,body>main{display:grid;grid-template-columns:repeat(3,340px);justify-content:center;align-items:start;gap:48px 42px;padding:0 40px 40px}main>section{min-width:0}main article{width:340px;height:708px;margin:0 auto}main>section>p:first-child{height:24px;margin:0 0 12px}}
@media(min-width:1001px){main>section:first-child{grid-column:span 2}main>section:first-child>p{text-align:center}}@media(min-width:1001px){main article{border-radius:6px;border:2px solid #8ed3e0}}article small,.facility,.phase,.hint{color:#dcecf2;font-size:16px}textarea{border:2px solid #badbe6;background:#172c38;color:white}textarea::placeholder{color:#c6dce5}.choices button[aria-pressed="false"]{background:#365362;color:#fff;border:1px solid #badbe6}

@media(min-width:1001px){body{padding-bottom:160px}}
@media(max-width:380px){article{height:748px;min-height:748px}}

/* Задание 15: самостоятельные визуальные материалы. */
.visual-hero{margin:0 0 18px;position:relative;overflow:hidden;flex:0 0 225px;min-height:0;border-radius:3px;border-top:2px solid #8ed3e0}
.visual-hero img{display:block;width:100%;height:225px;object-fit:cover}
.visual-story{margin:24px auto 0;max-width:340px;overflow:hidden;border-radius:3px;border-top:2px solid #8ed3e0}
.visual-story img{display:block;width:100%;height:190px;object-fit:cover}
.visual-story figcaption{font-size:14px;line-height:1.4;padding:12px 0}
.visual-reference{max-width:340px;margin:20px auto;overflow:hidden}.visual-reference>svg{width:100%;height:190px}.visual-reference>div{margin:0}
.visual-disclosure{font-size:14px;line-height:1.5}
.visual-hero:after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at var(--vx,50%) var(--vy,50%),#8ed3e033,transparent 50%)}
@media(max-width:1000px){.visual-story,.visual-reference{max-width:430px}.visual-hero{flex-basis:225px}}
@media(prefers-reduced-motion:reduce){.visual-hero img,.visual-story img,.visual-hero:after{animation:none!important;transition:none!important;transform:none!important;clip-path:none!important;opacity:1!important}}