:root {
  --primary: #2f7d5c;
  --accent: #f3b35f;
  --bg: #f4faf5;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #1d2622;
  --muted: #64726b;
  --line: rgba(31, 48, 40, 0.12);
  --danger: #b5413a;
  --success: #2f7d5c;
  --shadow: 0 18px 50px rgba(32, 48, 43, 0.12);
  --radius: 8px;
  --font-scale: 1;
  --motion: 0.6;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  font-size: calc(16px * var(--font-scale));
  letter-spacing: 0;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, var(--wallpaper-overlay, 0.08)), rgba(255, 255, 255, var(--wallpaper-overlay, 0.08))),
    var(--wallpaper, var(--bg));
  background-size: cover;
  background-position: center;
  color: var(--text);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  min-height: 40px;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  transition: transform calc(120ms * var(--motion)) ease, opacity calc(120ms * var(--motion)) ease;
}

button:hover {
  transform: translateY(-1px);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, white);
  outline-offset: 2px;
}

button.secondary {
  background: color-mix(in srgb, var(--primary) 12%, white);
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 25%, white);
}

button.ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--line);
}

button.danger {
  background: var(--danger);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: var(--surface-strong);
  color: var(--text);
}

textarea {
  min-height: 86px;
  resize: vertical;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

a {
  color: var(--primary);
}

.app-shell {
  min-height: 100vh;
}

.layout {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 20px 14px;
  background: color-mix(in srgb, var(--surface) 92%, var(--primary) 8%);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(14px);
  overflow-y: auto;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 10px 18px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--primary);
  color: white;
  font-weight: 800;
}

.brand h1 {
  margin: 0;
  font-size: 1.08rem;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.nav {
  display: grid;
  gap: 6px;
}

.nav button {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  color: var(--text);
  border: 1px solid transparent;
  text-align: left;
}

.nav button.active {
  background: var(--surface-strong);
  color: var(--primary);
  border-color: var(--line);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
}

.main {
  min-width: 0;
  padding: 24px clamp(16px, 4vw, 44px) 96px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.topbar h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 16px;
}

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

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

.panel,
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel {
  padding: 18px;
}

.card {
  padding: 14px;
}

.panel h3,
.card h3 {
  margin: 0 0 10px;
}

.muted {
  color: var(--muted);
}

.stat {
  display: grid;
  gap: 4px;
}

.stat strong {
  color: var(--primary);
  font-size: 1.6rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.full {
  grid-column: 1 / -1;
}

.task-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

.task-row:last-child {
  border-bottom: 0;
}

.task-row.done h4 {
  text-decoration: line-through;
  color: var(--muted);
}

.task-row h4 {
  margin: 0 0 4px;
}

.task-row p {
  margin: 0;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 24%, white);
  color: color-mix(in srgb, var(--primary) 72%, #222);
  font-size: 0.8rem;
}

.progress {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--primary) 12%, white);
}

.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.timeline {
  position: relative;
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 12px;
}

.timer {
  display: grid;
  place-items: center;
  min-height: 260px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 86%, var(--primary) 14%);
}

.timer strong {
  font-variant-numeric: tabular-nums;
  font-size: clamp(3rem, 10vw, 6rem);
}

.pet-room {
  display: grid;
  grid-template-columns: minmax(220px, 340px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.pet-figure {
  width: min(100%, 320px);
  margin: auto;
}

.pet-figure svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 24px rgba(0, 0, 0, 0.12));
}

.bars {
  display: grid;
  gap: 10px;
}

.chart-bars {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 6px;
  align-items: end;
  height: 160px;
}

.chart-bars span {
  min-height: 4px;
  border-radius: 4px 4px 0 0;
  background: var(--primary);
}

.donut {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: conic-gradient(var(--primary) var(--value), color-mix(in srgb, var(--primary) 12%, white) 0);
  display: grid;
  place-items: center;
}

.donut::after {
  content: attr(data-label);
  display: grid;
  place-items: center;
  width: 86px;
  height: 86px;
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--primary);
  font-weight: 700;
}

.mobile-nav {
  display: none;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 20;
  transform: translateX(-50%) translateY(120px);
  max-width: min(92vw, 520px);
  padding: 12px 16px;
  border-radius: var(--radius);
  background: #1f2b26;
  color: white;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.24);
  transition: transform calc(180ms * var(--motion)) ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.empty {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.dark {
  --surface: rgba(31, 37, 34, 0.9);
  --surface-strong: #232b27;
  --text: #f4f7f5;
  --muted: #b6c0bb;
  --line: rgba(255, 255, 255, 0.14);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.25);
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .main {
    padding: 18px 14px 92px;
  }

  .grid.two,
  .grid.three,
  .form-grid,
  .pet-room {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

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

  .mobile-nav {
    position: fixed;
    right: 10px;
    bottom: 10px;
    left: 10px;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--surface);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
  }

  .mobile-nav button {
    min-height: 48px;
    padding: 6px;
    background: transparent;
    color: var(--text);
    font-size: 0.76rem;
  }

  .mobile-nav button.active {
    background: color-mix(in srgb, var(--primary) 14%, white);
    color: var(--primary);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* Cosmic learning universe skin */
:root {
  --space: #0d1823;
  --space-2: #142838;
  --star: rgba(255, 255, 255, 0.86);
  --surface: rgba(255, 255, 255, 0.84);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.22);
}

body {
  background:
    radial-gradient(ellipse at 18% 8%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 34rem),
    radial-gradient(ellipse at 86% 18%, color-mix(in srgb, var(--primary) 32%, transparent), transparent 30rem),
    linear-gradient(135deg, color-mix(in srgb, var(--space) 90%, var(--primary) 10%), color-mix(in srgb, var(--space-2) 84%, var(--accent) 16%)),
    var(--wallpaper, var(--bg));
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  background: linear-gradient(rgba(255, 255, 255, var(--wallpaper-overlay, 0.05)), rgba(255, 255, 255, var(--wallpaper-overlay, 0.05)));
  pointer-events: none;
}

.cosmos-backdrop {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  pointer-events: none;
}

.star-field,
.star-field::before,
.star-field::after {
  position: absolute;
  inset: 0;
  content: "";
  background-repeat: repeat;
}

.star-field {
  opacity: 0.72;
  background-image:
    radial-gradient(circle, var(--star) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(255, 255, 255, 0.42) 0 1px, transparent 1.7px);
  background-size: 92px 92px, 148px 148px;
  background-position: 10px 14px, 36px 48px;
}

.star-field.layer-two {
  opacity: 0.34;
  transform: scale(1.18);
  filter: blur(0.4px);
}

.nebula {
  position: absolute;
  width: 44vw;
  height: 44vw;
  border-radius: 999px;
  filter: blur(64px);
  opacity: 0.2;
}

.nebula-mint {
  top: -14vw;
  right: -12vw;
  background: var(--primary);
}

.nebula-gold {
  bottom: -18vw;
  left: -14vw;
  background: var(--accent);
}

button {
  position: relative;
  isolation: isolate;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 22%, rgba(255, 255, 255, 0.8), transparent 0.44rem),
    linear-gradient(135deg, color-mix(in srgb, var(--primary) 88%, white), color-mix(in srgb, var(--primary) 78%, var(--accent)));
  box-shadow: 0 10px 26px color-mix(in srgb, var(--primary) 24%, transparent);
}

button::after {
  content: "";
  position: absolute;
  inset: 50% -8px auto;
  z-index: -1;
  height: 1px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 64%, transparent);
  transform: rotate(-9deg);
  opacity: 0.72;
}

button.secondary {
  background:
    radial-gradient(circle at 28% 26%, rgba(255, 255, 255, 0.9), transparent 0.36rem),
    color-mix(in srgb, var(--primary) 12%, white);
}

button.ghost::after,
button.danger::after,
.nav button::after,
.mobile-nav button::after {
  display: none;
}

.sidebar {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent),
    color-mix(in srgb, var(--space) 76%, var(--primary) 24%);
  color: #f8fbff;
  border-right-color: rgba(255, 255, 255, 0.12);
}

.brand-mark {
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 24%, rgba(255, 255, 255, 0.86), transparent 0.35rem),
    linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 12%, transparent), 0 14px 28px rgba(0, 0, 0, 0.18);
}

.brand p,
.sidebar .muted {
  color: rgba(248, 251, 255, 0.68);
}

.nav button {
  gap: 10px;
  border-radius: 999px;
  color: rgba(248, 251, 255, 0.84);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.nav button.active {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
  box-shadow: inset 0 0 22px rgba(255, 255, 255, 0.08), 0 10px 26px rgba(0, 0, 0, 0.16);
}

.nav-planet {
  display: grid;
  width: 30px;
  height: 30px;
  min-width: 30px;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 25%, rgba(255, 255, 255, 0.82), transparent 0.28rem),
    linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 10%, transparent);
}

.main > .topbar h2 {
  color: #fff;
  text-shadow: 0 0 28px rgba(255, 255, 255, 0.16);
}

.main > .topbar p {
  color: rgba(248, 251, 255, 0.74);
}

.panel,
.card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), transparent),
    var(--surface);
  border-color: rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(18px);
}

.stat {
  position: relative;
  overflow: hidden;
}

.cosmic-stat {
  min-height: 118px;
}

.stat strong {
  color: color-mix(in srgb, var(--primary) 82%, var(--accent));
}

.stat-orb {
  position: absolute;
  right: 18px;
  top: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 26%, rgba(255, 255, 255, 0.9), transparent 0.38rem),
    linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 12%, transparent);
  opacity: 0.9;
}

.welcome-main {
  max-width: 1080px;
  margin: 0 auto;
}

.cosmic-hero {
  position: relative;
  overflow: hidden;
  min-height: 460px;
  margin-top: min(8vh, 64px);
  padding: clamp(22px, 4vw, 44px);
  color: #f7fbff;
  background:
    radial-gradient(circle at 78% 34%, color-mix(in srgb, var(--primary) 28%, transparent), transparent 18rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.06)),
    color-mix(in srgb, var(--space) 82%, var(--primary) 18%);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.34);
}

.cosmic-hero .muted {
  color: rgba(247, 251, 255, 0.78);
}

.hero-copy h2 {
  margin: 14px 0;
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 0.95;
  color: #fff;
  text-shadow: 0 0 32px color-mix(in srgb, var(--accent) 28%, transparent);
}

.planet-actions {
  margin-top: 24px;
}

.hero-system {
  display: grid;
  min-height: 340px;
  place-items: center;
}

.orbit-map {
  position: relative;
  display: grid;
  width: min(100%, 380px);
  aspect-ratio: 1;
  place-items: center;
}

.orbit-line,
.orbital-ring {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
}

.line-one {
  inset: 18%;
  transform: rotate(-18deg) scaleX(1.16);
}

.line-two {
  inset: 5%;
  transform: rotate(22deg) scaleX(1.05);
}

.orbital-ring {
  opacity: 0.22;
  pointer-events: none;
}

.ring-a {
  width: 32rem;
  height: 10rem;
  right: -8rem;
  top: 3rem;
  transform: rotate(-18deg);
}

.ring-b {
  width: 26rem;
  height: 8rem;
  left: -10rem;
  bottom: 2rem;
  transform: rotate(18deg);
}

.orbit-dot,
.mini-planet {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 25%, rgba(255, 255, 255, 0.85), transparent 0.32rem),
    linear-gradient(135deg, var(--accent), var(--primary));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 12%, transparent), 0 14px 26px rgba(0, 0, 0, 0.2);
}

.dot-one {
  width: 58px;
  height: 58px;
  left: 8%;
  top: 25%;
}

.dot-two {
  width: 70px;
  height: 70px;
  right: 4%;
  top: 46%;
}

.dot-three {
  width: 54px;
  height: 54px;
  left: 28%;
  bottom: 2%;
}

.planet-core {
  width: min(68%, 260px);
  z-index: 1;
}

.study-orbit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 360px);
  gap: 18px;
  align-items: center;
  margin-bottom: 16px;
  overflow: hidden;
}

.study-orbit h3 {
  margin-top: 12px;
  font-size: clamp(1.4rem, 3vw, 2.4rem);
}

.mini-system {
  position: relative;
  min-height: 190px;
}

.mini-system::before,
.mini-system::after {
  content: "";
  position: absolute;
  inset: 18px 34px;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent);
  border-radius: 50%;
  transform: rotate(-12deg);
}

.mini-system::after {
  inset: 42px 70px;
  transform: rotate(20deg);
}

.mini-sun {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  width: 86px;
  height: 86px;
  place-items: center;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(circle at 35% 28%, rgba(255, 255, 255, 0.9), transparent 0.5rem),
    linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 0 38px color-mix(in srgb, var(--primary) 38%, transparent);
}

.mini-planet {
  width: 44px;
  height: 44px;
}

.p1 {
  left: 16%;
  top: 22%;
}

.p2 {
  right: 12%;
  top: 30%;
}

.p3 {
  left: 58%;
  bottom: 12%;
}

@media (max-width: 900px) {
  .study-orbit,
  .cosmic-hero .grid.two {
    grid-template-columns: 1fr;
  }

  .hero-system {
    min-height: 260px;
  }

  .mobile-nav {
    background: color-mix(in srgb, var(--space) 80%, var(--primary) 20%);
  }

  .mobile-nav button {
    color: rgba(248, 251, 255, 0.86);
  }

  .mobile-nav .nav-planet {
    width: 12px;
    height: 12px;
    min-width: 12px;
    margin: 0 auto 2px;
    font-size: 0;
  }
}