:root {
  --bg-deep: #0b1210;
  --bg-mid: #14201c;
  --ink: #f2f7f4;
  --muted: #9bb7a8;
  --accent: #3ddc97;
  --accent-hot: #f0b429;
  --panel: rgba(18, 32, 28, 0.92);
  --line: rgba(61, 220, 151, 0.28);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --font-display: "Orbitron", sans-serif;
  --font-body: "Space Grotesk", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg-deep);
  color: var(--ink);
  font-family: var(--font-body);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% 110%, rgba(240, 180, 41, 0.12), transparent 55%),
    linear-gradient(165deg, #0b1210 0%, #14201c 45%, #0e1814 100%);
}

.atmosphere__glow {
  position: absolute;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  animation: drift 14s ease-in-out infinite alternate;
}

.atmosphere__glow--left {
  top: -8%;
  left: -10%;
  background: rgba(61, 220, 151, 0.18);
}

.atmosphere__glow--right {
  right: -12%;
  bottom: 5%;
  background: rgba(240, 180, 41, 0.14);
  animation-delay: -4s;
}

.atmosphere__grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(242, 247, 244, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 247, 244, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 75%);
}

.atmosphere__belts {
  position: absolute;
  inset: auto 0 18% 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-hot), transparent);
  opacity: 0.35;
  animation: belt 6s linear infinite;
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem 3rem;
}

.screen {
  width: min(920px, 100%);
}

.screen[hidden] {
  display: none !important;
}

.screen--title {
  display: grid;
  gap: 3.5rem;
  justify-items: center;
  text-align: center;
  animation: rise 0.7s ease-out both;
}

.brand__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.brand__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 8vw, 4.6rem);
  letter-spacing: 0.04em;
  line-height: 1.05;
  text-shadow: 0 0 40px rgba(61, 220, 151, 0.25);
  animation: titlePulse 4.5s ease-in-out infinite;
}

.brand__tagline {
  margin: 1rem auto 0;
  max-width: 34rem;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  line-height: 1.45;
  color: #c5d9ce;
}

.title-actions {
  display: grid;
  grid-template-columns: 1fr 1.35fr 1fr;
  gap: 1rem;
  width: min(720px, 100%);
  align-items: end;
}

.menu-btn {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(30, 48, 42, 0.95), rgba(16, 28, 24, 0.98));
  color: var(--ink);
  cursor: pointer;
  display: grid;
  gap: 0.35rem;
  justify-items: center;
  padding: 1.1rem 0.85rem;
  box-shadow: var(--shadow);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}

.menu-btn:hover,
.menu-btn:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(61, 220, 151, 0.7);
  outline: none;
  box-shadow:
    var(--shadow),
    0 0 0 1px rgba(61, 220, 151, 0.2);
}

.menu-btn:active {
  transform: translateY(-1px);
}

.menu-btn__icon {
  font-size: 1.35rem;
  line-height: 1;
  opacity: 0.9;
}

.menu-btn__label {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.menu-btn--side {
  min-height: 5.5rem;
}

.menu-btn--play {
  min-height: 7rem;
  border-color: rgba(240, 180, 41, 0.55);
  background:
    radial-gradient(circle at 50% 0%, rgba(240, 180, 41, 0.28), transparent 55%),
    linear-gradient(180deg, rgba(48, 40, 18, 0.98), rgba(22, 28, 18, 0.98));
}

.menu-btn--play .menu-btn__label {
  font-size: 1.25rem;
  color: #ffe7a3;
}

.menu-btn--play:hover,
.menu-btn--play:focus-visible {
  border-color: rgba(240, 180, 41, 0.9);
  box-shadow:
    var(--shadow),
    0 0 28px rgba(240, 180, 41, 0.22);
}

.screen--panel,
.screen--play {
  animation: rise 0.45s ease-out both;
}

.panel {
  margin: 0 auto;
  width: min(520px, 100%);
  padding: 2rem 1.75rem;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel__copy {
  margin: 0.75rem 0 1.5rem;
  color: #c5d9ce;
  line-height: 1.5;
}

.field {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.field--row {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.field__label {
  font-weight: 600;
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.mod-list {
  margin: 0 0 1.5rem;
  padding-left: 1.2rem;
  color: #c5d9ce;
  line-height: 1.7;
}

.panel__back,
.hud__menu {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.08);
  color: var(--ink);
  cursor: pointer;
  padding: 0.7rem 1.2rem;
  font-weight: 600;
  transition:
    background 0.15s ease,
    border-color 0.15s ease;
}

.panel__back:hover,
.panel__back:focus-visible,
.hud__menu:hover,
.hud__menu:focus-visible {
  background: rgba(61, 220, 151, 0.18);
  border-color: rgba(61, 220, 151, 0.6);
  outline: none;
}

.screen--play {
  width: min(1200px, 100%);
  display: grid;
  gap: 0.85rem;
  animation: rise 0.45s ease-out both;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  justify-content: space-between;
}

.hud__goal {
  margin: 0;
  flex: 1 1 220px;
  color: #ffe7a3;
  font-weight: 600;
}

.hud__meta {
  display: flex;
  gap: 0.75rem;
  color: #c5d9ce;
  font-size: 0.92rem;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.9fr);
  gap: 1rem;
  align-items: start;
}

.world-panel,
.side-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(14, 24, 20, 0.92);
  box-shadow: var(--shadow);
}

.world-panel {
  padding: 0.85rem;
}

.world-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.world-toolbar button {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(61, 220, 151, 0.08);
  color: var(--ink);
  cursor: pointer;
  padding: 0.45rem 0.85rem;
  font-weight: 600;
  font-size: 0.88rem;
}

.world-toolbar button:hover:not(:disabled),
.world-toolbar button.is-active {
  border-color: rgba(240, 180, 41, 0.75);
  background: rgba(240, 180, 41, 0.16);
}

.world-toolbar button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.world-toolbar button.danger {
  margin-left: auto;
  border-color: rgba(220, 90, 90, 0.45);
  color: #ffb4b4;
}

.world-grid {
  --cols: 12;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  gap: 4px;
  padding: 6px;
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(28, 48, 38, 0.55), rgba(12, 20, 16, 0.85)),
    repeating-linear-gradient(90deg, rgba(61, 220, 151, 0.05) 0 1px, transparent 1px 24px);
}

.tile {
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  background: #1b2c24;
  color: var(--ink);
  cursor: pointer;
  padding: 0;
  display: grid;
  place-items: center;
  transition:
    transform 0.12s ease,
    border-color 0.12s ease,
    filter 0.12s ease;
}

.tile:hover {
  transform: translateY(-1px) scale(1.03);
  border-color: rgba(61, 220, 151, 0.55);
  z-index: 1;
}

.tile__icon {
  font-size: clamp(0.9rem, 2.2vw, 1.25rem);
  line-height: 1;
}

.tile--grass {
  background: #20362c;
}

.tile--tree {
  background: linear-gradient(180deg, #2f5a3a, #1d3a28);
}

.tile--rock {
  background: linear-gradient(180deg, #4a5560, #2e3640);
}

.tile--coal {
  background: linear-gradient(180deg, #2a2a2a, #151515);
}

.tile--iron {
  background: linear-gradient(180deg, #6a4530, #3d281c);
}

.tile--copper {
  background: linear-gradient(180deg, #7a4a28, #4a2c16);
}

.tile--depleted {
  filter: grayscale(0.7) brightness(0.7);
}

.tile--drill {
  background: linear-gradient(180deg, #1f5a4a, #12352c);
  border-color: rgba(61, 220, 151, 0.55);
  animation: machinePulse 1.4s ease-in-out infinite;
}

.tile--smelter {
  background: linear-gradient(180deg, #6a3a18, #3a2010);
  border-color: rgba(240, 180, 41, 0.55);
  animation: machinePulse 1.8s ease-in-out infinite;
}

.game-toast {
  margin: 0.65rem 0 0;
  min-height: 1.3em;
  color: var(--accent-hot);
  font-weight: 600;
}

.world-help {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.side-panels {
  display: grid;
  gap: 1rem;
}

.side-card {
  padding: 0.9rem 1rem 1rem;
}

.side-card h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.inventory-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  max-height: 220px;
  overflow: auto;
}

.inv-item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 0.45rem;
  align-items: center;
  padding: 0.35rem 0.45rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
}

.inv-item em {
  font-style: normal;
  color: var(--muted);
  font-size: 0.85rem;
}

.inv-empty {
  color: var(--muted);
  font-size: 0.9rem;
}

.craft-list {
  display: grid;
  gap: 0.45rem;
  max-height: 360px;
  overflow: auto;
}

.craft-btn {
  appearance: none;
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.55rem;
  align-items: center;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  cursor: pointer;
  padding: 0.55rem 0.65rem;
}

.craft-btn.is-ready {
  border-color: rgba(61, 220, 151, 0.45);
  background: rgba(61, 220, 151, 0.1);
}

.craft-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.craft-btn__body {
  display: grid;
  gap: 0.15rem;
}

.craft-btn__body small {
  color: var(--muted);
}

.craft-btn__icon {
  font-size: 1.2rem;
}

@keyframes machinePulse {
  0%,
  100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.18);
  }
}

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

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(4%, 3%, 0) scale(1.08);
  }
}

@keyframes belt {
  from {
    transform: translateX(-8%);
    opacity: 0.15;
  }
  to {
    transform: translateX(8%);
    opacity: 0.45;
  }
}

@keyframes titlePulse {
  0%,
  100% {
    text-shadow: 0 0 28px rgba(61, 220, 151, 0.18);
  }
  50% {
    text-shadow: 0 0 48px rgba(61, 220, 151, 0.35);
  }
}

@media (max-width: 640px) {
  .title-actions {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .menu-btn--side,
  .menu-btn--play {
    min-height: 4.5rem;
    grid-template-columns: auto 1fr;
    justify-items: start;
    align-items: center;
    text-align: left;
    padding: 1rem 1.2rem;
  }

  .menu-btn--play {
    order: -1;
  }

  .app:has(.screen--play.is-active),
  .app:has(#screen-play:not([hidden])) {
    place-items: start center;
    padding-top: 1rem;
  }
}