:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --bg-elevated: #121821;
  --panel: rgba(18, 24, 33, 0.86);
  --panel-strong: rgba(24, 32, 44, 0.94);
  --panel-soft: rgba(255, 255, 255, 0.045);
  --panel-border: rgba(255, 255, 255, 0.11);
  --panel-border-strong: rgba(255, 255, 255, 0.18);
  --text: #f7fafc;
  --text-strong: #ffffff;
  --muted: #a9b4c2;
  --muted-strong: #c9d2dc;
  --accent: #6aaa64;
  --accent-strong: #87d37f;
  --accent-ink: #071307;
  --warning: #c9b458;
  --warning-ink: #17130a;
  --absent: #3a4352;
  --danger: #ff8f8f;
  --danger-border: rgba(255, 143, 143, 0.45);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --shadow-soft: 0 14px 36px rgba(0, 0, 0, 0.24);
  --focus: 0 0 0 3px rgba(135, 211, 127, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background:
    radial-gradient(circle at 8% 8%, rgba(106, 170, 100, 0.24), transparent 30%),
    radial-gradient(circle at 88% 0%, rgba(201, 180, 88, 0.16), transparent 28%),
    linear-gradient(180deg, #121821 0%, #0b0f14 62%, #080b0f 100%);
  color: var(--text);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 72%);
}

button,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.page-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0 64px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
  gap: 28px;
  align-items: stretch;
}

.hero-copy-wrap {
  min-height: 330px;
  padding: clamp(28px, 5vw, 48px);
  border: 1px solid var(--panel-border);
  border-radius: 34px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.085), rgba(255, 255, 255, 0.025)),
    var(--panel);
  box-shadow: var(--shadow);
  display: grid;
  align-content: end;
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.hero-copy-wrap > * {
  position: relative;
  z-index: 1;
}

.hero-copy-wrap::before {
  position: absolute;
  top: 28px;
  right: 28px;
  width: min(36vw, 230px);
  aspect-ratio: 5 / 4;
  content: "";
  border-radius: 24px;
  opacity: 0.72;
  background:
    linear-gradient(90deg, var(--accent) 0 19%, transparent 19% 21%, var(--warning) 21% 40%, transparent 40% 42%, var(--absent) 42% 61%, transparent 61% 63%, var(--accent) 63% 82%, transparent 82% 84%, var(--warning) 84% 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04));
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.28);
  transform: rotate(3deg);
  z-index: 0;
}

.hero-copy-wrap::after {
  position: absolute;
  top: 42px;
  right: 48px;
  width: min(32vw, 190px);
  height: 44px;
  content: "CRANE";
  display: grid;
  place-items: center;
  border-radius: 18px;
  color: rgba(255, 255, 255, 0.86);
  font-weight: 900;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  background: rgba(9, 12, 17, 0.5);
  transform: rotate(3deg);
  z-index: 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(3.4rem, 8vw, 6.5rem);
  line-height: 0.86;
  letter-spacing: -0.08em;
}

.hero-copy {
  max-width: 560px;
  margin: 22px 0 0;
  color: var(--muted-strong);
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  line-height: 1.7;
}

.hero-card,
.panel,
.status-card,
.board-panel,
.helper-guide {
  border: 1px solid var(--panel-border);
  border-radius: 26px;
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.hero-card {
  padding: 28px;
  display: grid;
  align-content: space-between;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle at 88% 14%, rgba(135, 211, 127, 0.2), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 48%);
}

.hero-card > * {
  position: relative;
}

.hero-card-label {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-card-value {
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 850;
  letter-spacing: -0.06em;
}

.hero-card-meta,
.panel-copy p {
  color: var(--muted);
  line-height: 1.65;
}

.hero-card-meta {
  margin: 0;
}

.mode-tabs {
  display: inline-flex;
  gap: 8px;
  margin: 28px 0 20px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.mode-tab,
.primary-button,
.secondary-button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    background 0.16s ease,
    border-color 0.16s ease,
    color 0.16s ease,
    box-shadow 0.16s ease;
}

.mode-tab {
  padding: 12px 18px;
  background: transparent;
  color: var(--muted);
  font-weight: 750;
}

.mode-tab:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.mode-tab.is-active {
  color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 10px 24px rgba(106, 170, 100, 0.26);
}

.panels {
  display: grid;
}

.panel {
  display: none;
  gap: 20px;
  padding: clamp(22px, 4vw, 34px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025)),
    var(--panel);
}

.panel.is-active {
  display: grid;
}

.panel-copy {
  max-width: 780px;
}

.panel-copy h2 {
  margin: 0 0 10px;
  color: var(--text-strong);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

.panel-copy p {
  margin: 0;
  font-size: 1rem;
}

.helper-guide {
  padding: 20px 22px;
  background:
    linear-gradient(135deg, rgba(106, 170, 100, 0.12), rgba(255, 255, 255, 0.035)),
    var(--panel-soft);
}

.helper-guide h3 {
  margin: 0 0 14px;
  color: var(--text-strong);
  font-size: 1rem;
}

.helper-guide ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: helper-step;
}

.helper-guide li {
  min-height: 100%;
  padding: 14px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  color: var(--muted-strong);
  background: rgba(8, 11, 15, 0.24);
  line-height: 1.45;
  counter-increment: helper-step;
}

.helper-guide li::before {
  content: counter(helper-step);
  display: grid;
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  place-items: center;
  border-radius: 999px;
  color: var(--accent-ink);
  background: var(--accent-strong);
  font-weight: 850;
}

.controls-grid,
.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: end;
}

.feedback-editor {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.035);
}

.field {
  display: grid;
  gap: 8px;
  min-width: min(280px, 100%);
  flex: 1 1 280px;
}

.field span {
  color: var(--muted-strong);
  font-size: 0.92rem;
  font-weight: 750;
}

.field input {
  width: 100%;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: rgba(8, 11, 15, 0.38);
  color: var(--text);
  padding: 15px 16px;
  text-transform: lowercase;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.field input::placeholder {
  color: rgba(169, 180, 194, 0.58);
}

.primary-button,
.secondary-button {
  min-height: 50px;
  padding: 14px 22px;
  font-weight: 800;
}

.primary-button {
  color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 12px 26px rgba(106, 170, 100, 0.24);
}

.secondary-button {
  border: 1px solid var(--panel-border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}

.primary-button:disabled,
.secondary-button:disabled,
.feedback-tile:disabled {
  opacity: 0.46;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.status-card {
  padding: 16px 18px;
  line-height: 1.55;
  background: var(--panel-strong);
}

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

.status-card.success {
  border-color: rgba(106, 170, 100, 0.42);
  color: var(--text);
}

.status-card.error {
  border-color: var(--danger-border);
  color: var(--danger);
}

.board-panel {
  min-height: 320px;
  padding: clamp(18px, 3vw, 26px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent),
    rgba(8, 11, 15, 0.22);
}

.board-grid {
  display: grid;
  gap: 10px;
  justify-content: center;
}

.board-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.tile,
.feedback-tile {
  width: min(70px, 15vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 18px;
  border: 1px solid var(--panel-border-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tile {
  font-size: clamp(1.18rem, 3vw, 1.85rem);
}

.tile--g {
  border-color: rgba(135, 211, 127, 0.34);
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  color: var(--accent-ink);
}

.tile--y {
  border-color: rgba(201, 180, 88, 0.36);
  background: linear-gradient(180deg, #dcc96d, var(--warning));
  color: var(--warning-ink);
}

.tile--n {
  background: var(--absent);
}

.tile--active {
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.2),
    0 10px 22px rgba(0, 0, 0, 0.2);
}

.feedback-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.feedback-tile {
  border: 0;
  font-size: clamp(1.08rem, 3vw, 1.45rem);
  cursor: pointer;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.18);
}

.feedback-tile:not(:disabled):hover {
  transform: translateY(-1px);
}

.feedback-tile--g {
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  color: var(--accent-ink);
}

.feedback-tile--y {
  background: linear-gradient(180deg, #dcc96d, var(--warning));
  color: var(--warning-ink);
}

.feedback-tile--n {
  background: var(--absent);
}

.feedback-legend {
  display: flex;
  gap: 10px 14px;
  flex-wrap: wrap;
  color: var(--muted-strong);
  font-size: 0.93rem;
}

.feedback-legend > span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(8, 11, 15, 0.2);
}

.legend-dot {
  width: 12px;
  height: 12px;
  display: inline-block;
  flex: 0 0 auto;
  border-radius: 999px;
  margin-right: 8px;
}

.legend-dot--g {
  background: var(--accent);
}

.legend-dot--y {
  background: var(--warning);
}

.legend-dot--n {
  background: var(--absent);
}

.board-summary {
  margin: 16px 0 0;
  text-align: center;
  color: var(--muted);
}

.board-panel > .board-summary:first-child {
  margin: 0;
}

.loader {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.loader::before {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  content: "";
  background: var(--accent-strong);
  box-shadow:
    18px 0 0 rgba(135, 211, 127, 0.55),
    36px 0 0 rgba(135, 211, 127, 0.22);
  animation: pulse 1s infinite ease-in-out;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.65;
    transform: translateX(0);
  }

  50% {
    opacity: 1;
    transform: translateX(6px);
  }
}

@media (max-width: 900px) {
  .page-shell {
    width: min(100% - 28px, 1120px);
    padding: 24px 0 44px;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy-wrap {
    min-height: 300px;
  }

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

@media (max-width: 620px) {
  .page-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 14px;
  }

  .hero-copy-wrap,
  .hero-card,
  .panel {
    border-radius: 22px;
  }

  .hero-copy-wrap {
    min-height: 0;
    padding: 24px;
  }

  .hero-copy-wrap::before,
  .hero-copy-wrap::after {
    display: none;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 4.2rem);
  }

  .mode-tabs {
    width: 100%;
    overflow-x: auto;
  }

  .mode-tab {
    flex: 1 0 auto;
  }

  .helper-guide ol {
    grid-template-columns: 1fr;
  }

  .actions-row,
  .controls-grid {
    align-items: stretch;
  }

  .primary-button,
  .secondary-button,
  .controls-grid .field {
    width: 100%;
  }

  .tile,
  .feedback-tile {
    width: min(58px, 16vw);
    border-radius: 14px;
  }

  .board-row,
  .board-grid {
    gap: 8px;
  }
}