/* ============================ 首页与账号页 ============================ */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--sun);
  color: var(--ink);
  padding: 8px 14px;
  z-index: 60;
}

.skip:focus {
  left: 8px;
  top: 8px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.topnav__cta {
  border-color: var(--sun) !important;
  background: var(--sun);
  color: var(--night) !important;
  font-weight: 600;
}

.topnav__who {
  color: #9fb0be;
  padding: 0 6px;
}

.topnav__link {
  border: 2px solid transparent;
  background: none;
  color: #d6e2ea;
  font-size: var(--t-14);
  padding: 5px 10px;
  cursor: pointer;
}

.topnav__link:hover {
  color: #fff;
  border-color: #46586a;
}

/* -------------------------------- 首屏 -------------------------------- */

.hero {
  border-top: 0;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(28px, 5vw, 56px);
}

.kicker {
  font-size: var(--t-12);
  color: var(--leaf-d);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.hero__title {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  letter-spacing: -0.02em;
  text-shadow: 3px 3px 0 var(--paper-3);
}

.hero__lede {
  margin-top: 16px;
  max-width: 34em;
  color: var(--ink-2);
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.specs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 32px;
  border-top: 2px solid var(--ink);
}

.specs > div {
  padding: 10px 12px 0 0;
}

.specs > div + div {
  border-left: 2px solid var(--line);
  padding-left: 12px;
}

.specs dt {
  font-size: var(--t-12);
  color: var(--ink-3);
}

.specs dd {
  margin: 2px 0 0;
  font-size: var(--t-14);
}

/* -------------------------------- 玻璃缸 -------------------------------- */

.hero__stage {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.terrarium-host {
  position: relative;
  max-width: 100%;
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--sky);
  overflow: hidden;
  touch-action: manipulation;
}

.terrarium__scene {
  image-rendering: pixelated;
  display: block;
}

.terrarium__pet {
  position: absolute;
  image-rendering: pixelated;
  cursor: pointer;
  filter: drop-shadow(2px 2px 0 rgba(19, 26, 33, 0.18));
}

.stagebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 520px;
  border-top: 2px solid var(--ink);
  padding-top: 10px;
}

.stagebar__line {
  color: var(--ink-2);
  margin: 0;
}

/* -------------------------------- 三步 -------------------------------- */

.band__title {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  margin: 34px 0 22px;
}

.steps {
  padding-bottom: 40px;
}

.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
}

.step {
  padding: 22px 20px 26px 20px;
}

.step + .step {
  border-left: 2px solid var(--line);
}

.step__art {
  width: 96px;
  height: 96px;
  border: 2px solid var(--ink);
  display: grid;
  place-items: center;
  background-image: repeating-conic-gradient(var(--paper-3) 0% 25%, var(--paper-2) 0% 50%);
  background-size: 16px 16px;
}

.step__n {
  font-size: var(--t-12);
  color: var(--ink-3);
  margin: 16px 0 4px;
}

.step__title {
  font-size: var(--t-26);
}

.step__body {
  margin-top: 8px;
  color: var(--ink-2);
  font-size: var(--t-14);
  max-width: 30em;
}

/* ------------------------------- 说明区 ------------------------------- */

.notes {
  padding: 34px 0 46px;
}

.notes__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.note {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.note h3 {
  font-size: var(--t-16);
}

.note p {
  margin-top: 8px;
  font-size: var(--t-14);
  color: var(--ink-2);
}

/* ------------------------------- 账号页 ------------------------------- */

.auth {
  padding: clamp(28px, 5vw, 64px) 0;
}

.auth__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.auth__title {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  text-shadow: 3px 3px 0 var(--paper-3);
}

.auth__lede {
  margin-top: 14px;
  color: var(--ink-2);
  max-width: 30em;
}

.auth__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line);
}

.auth__list li {
  border-bottom: 2px solid var(--line);
  padding: 9px 0;
}

.auth__form {
  border: 2px solid var(--ink);
  background: var(--paper-2);
  box-shadow: var(--shadow-hard);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth__switch {
  color: var(--ink-2);
}

/* ------------------------------ 通用页面块 ------------------------------ */

.page__title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-top: 30px;
  text-shadow: 3px 3px 0 var(--paper-3);
}

.page__lede {
  margin-top: 10px;
  color: var(--ink-2);
  max-width: 46em;
}

.empty {
  border: 2px dashed var(--line);
  background: var(--paper-2);
  padding: 26px;
  max-width: 560px;
}

.empty--slim {
  padding: 16px;
}

.empty h2 {
  font-size: var(--t-20);
}

.empty p {
  margin-top: 8px;
}

.empty__actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  .hero__grid,
  .auth__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .steps__grid,
  .notes__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .step + .step {
    border-left: 0;
    border-top: 2px solid var(--line);
  }
}

@media (max-width: 560px) {
  .specs {
    grid-template-columns: minmax(0, 1fr);
  }

  .specs > div + div {
    border-left: 0;
    border-top: 2px solid var(--line);
    padding-left: 0;
  }
}