/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --color-yellow: #F8CB46;
  --color-black: #1C1C1C;
  --color-green: #0C831F;
  --color-white: #FFFFFF;
  --color-gray-light: #EAF6EC;
  --color-red: #E24B4A;

  --color-text: var(--color-black);
  --color-text-muted: #6B6B6B;
  --color-border: #EDE1AE;
  --color-bg: #FFF6DE;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;

  --radius-card: 14px;
  --radius-pill: 999px;
  --radius-sm: 8px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  --max-width: 760px;

  --shadow-none: none;
}

/* ==========================================================================
   Reset & base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

html, body {
  overflow-x: hidden;
  width: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
  font-size: 16px;
}

img, svg { display: block; max-width: 100%; }

button {
  font-family: inherit;
  cursor: pointer;
}

input {
  font-family: inherit;
}

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

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3) 0;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

p { margin: 0 0 var(--space-3) 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

section {
  padding: var(--space-7) 0;
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type { border-bottom: none; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.section-title {
  font-size: 1.6rem;
  max-width: 32ch;
}

.section-body {
  color: var(--color-text);
  max-width: 62ch;
  font-size: 1.02rem;
}

/* ==========================================================================
   Components: card, pill, button
   ========================================================================== */
.card {
  background: var(--color-gray-light);
  border-radius: var(--radius-card);
  padding: var(--space-5);
}

.card + .card { margin-top: var(--space-4); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-gray-light);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}

.pill--yellow { background: var(--color-yellow); color: var(--color-black); }
.pill--green { background: #E4F3E6; color: var(--color-green); }
.pill--red { background: #FBE6E5; color: var(--color-red); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-5);
  font-size: 1rem;
  font-weight: 700;
  transition: transform 0.1s ease, opacity 0.15s ease;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn--primary {
  background: var(--color-yellow);
  color: var(--color-black);
}

.btn--primary:hover:not(:disabled) { opacity: 0.9; }

.btn--secondary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn--secondary:hover:not(:disabled) { opacity: 0.85; }

.btn--linkedin {
  background: #0A66C2;
  color: var(--color-white);
}

.btn--linkedin:hover { opacity: 0.9; }

.tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 6px;
  border-radius: 4px;
  vertical-align: middle;
  white-space: nowrap;
}

.tag--sourced { background: var(--color-white); color: var(--color-green); border: 1px solid #C7E7CC; }
.tag--assumption { background: var(--color-white); color: #8A6A0E; border: 1px solid #E9D48A; }

/* ==========================================================================
   Hero — full-bleed yellow band
   ========================================================================== */
.hero-band {
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
  padding: 0;
  border-bottom: none;
}

.hero-band__inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-4) var(--space-7);
}

.wordmark {
  font-size: clamp(2.75rem, 11vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--color-black);
  margin-bottom: var(--space-4);
}

.wordmark__accent { color: var(--color-green); }

.hero__unofficial {
  background: var(--color-black);
  color: var(--color-yellow);
  margin-bottom: var(--space-5);
  white-space: normal;
  text-align: left;
}

.hero__eyebrow {
  color: var(--color-black);
  opacity: 0.65;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.hero-band h1 {
  font-size: 2.1rem;
  margin-bottom: var(--space-4);
  max-width: 20ch;
}

.hero__hook {
  font-size: 1.1rem;
  color: var(--color-black);
  opacity: 0.75;
  max-width: 46ch;
  margin-bottom: 0;
}

.hero-band__truck {
  position: absolute;
  right: var(--space-4);
  bottom: var(--space-5);
  opacity: 0.5;
}

@media (max-width: 640px) {
  .hero-band__truck { display: none; }
}

/* ==========================================================================
   Problem section — illustrated steps, stat card, statement
   ========================================================================== */
.problem-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

@media (max-width: 640px) {
  .problem-cards {
    grid-template-columns: 1fr;
  }
}

.problem-card {
  background: var(--color-gray-light);
  border-radius: var(--radius-card);
  padding: var(--space-4);
  text-align: center;
}

.problem-card__illustration {
  width: 100%;
  max-width: 140px;
  height: auto;
  margin: 0 auto var(--space-3);
}

.problem-card__title {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

.problem-card__caption {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

.problem-statement {
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-card);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-5);
  font-size: 0.98rem;
  line-height: 1.5;
}

.problem-statement strong {
  color: var(--color-yellow);
}

.solution-statement {
  background: var(--color-green);
  color: var(--color-white);
  border-radius: var(--radius-card);
  padding: var(--space-4) var(--space-5);
  margin-top: var(--space-4);
  margin-bottom: 0;
  font-size: 0.98rem;
  line-height: 1.5;
}

.solution-statement strong {
  color: var(--color-yellow);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.stat-card__number {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-black);
  white-space: nowrap;
}

.stat-card__desc {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.spike-chart {
  width: 100%;
  height: auto;
  margin-top: var(--space-4);
}

/* ==========================================================================
   Trade-off section — two-bar comparison
   ========================================================================== */
.tradeoff-bars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.tradeoff-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.tradeoff-bar__label {
  font-size: 0.85rem;
  font-weight: 700;
}

.tradeoff-bar__track {
  height: 120px;
  background: var(--color-gray-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.tradeoff-bar__fill {
  width: 100%;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height 0.6s ease;
}

.tradeoff-bar__fill--shelf { background: var(--color-yellow); }
.tradeoff-bar__fill--risk { background: var(--color-red); }

.tradeoff-bar__value {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Game section
   ========================================================================== */
.game-shell {
  margin-top: var(--space-5);
}

.game-shell > * + * {
  margin-top: var(--space-5);
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.game-header__day {
  font-weight: 800;
  font-size: 1rem;
}

.game-header__costs {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.cost-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--color-gray-light);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  min-width: 88px;
}

.cost-chip__label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  font-weight: 700;
}

.cost-chip__value {
  font-size: 1.05rem;
  font-weight: 800;
}

.cost-chip__value--danger { color: var(--color-red); }

.game-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .game-board {
    grid-template-columns: 1fr 1fr;
  }
}

.silo-panel {
  background: var(--color-gray-light);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.store-scene {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg);
}

.store-scene canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.store-scene-fallback {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.store-scene-fallback__track {
  height: 140px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.store-scene-fallback__fill {
  width: 100%;
  background: var(--color-green);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height 0.5s ease, background 0.3s ease;
}

.silo-readout {
  text-align: center;
}

.silo-readout__value {
  font-size: 1.8rem;
  font-weight: 800;
}

.silo-readout__label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.incoming-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.incoming-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 32px;
}

.truck-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-gray-light);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-3);
  font-size: 0.85rem;
  font-weight: 600;
  animation: slide-in 0.4s ease;
}

.truck-pill__icon { flex-shrink: 0; }

@keyframes slide-in {
  from { transform: translateX(-12px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 140px;
}

.field label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.field input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: 1rem;
  width: 100%;
}

.field input:focus, .btn:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}

.buffer-control__row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.buffer-control__row input[type="range"] {
  flex: 1;
  min-width: 0;
  width: auto;
  border: none;
  padding: 0;
  accent-color: var(--color-green);
}

.buffer-control__value {
  font-weight: 800;
  font-size: 1rem;
  min-width: 84px;
  text-align: right;
  flex-shrink: 0;
}

.playback-control {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.playback-control .tick-progress {
  flex: 1;
}

.cost-legend p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-1) 0;
}

.cost-legend p:last-child {
  margin-bottom: 0;
}

.order-form__hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.tick-progress {
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.tick-progress__fill {
  height: 100%;
  width: 0%;
  background: var(--color-green);
  border-radius: var(--radius-pill);
}

/* Day log */
.day-log {
  margin-top: var(--space-5);
}

.day-log__title {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.day-log__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 260px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.day-log__row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-light);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.day-log__day {
  font-weight: 800;
  color: var(--color-text-muted);
}

.day-log__detail { color: var(--color-text); }

.day-log__row--stockout { border-left: 3px solid var(--color-red); }
.day-log__row--delivered { border-left: 3px solid var(--color-green); }

/* Game over screen */
.score-screen {
  margin-top: var(--space-5);
}

.score-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin: var(--space-4) 0;
}

.score-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
}

.score-bar__track {
  width: 56px;
  height: 160px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.score-bar__fill {
  width: 100%;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height 0.6s ease;
}

.score-bar__fill--player { background: var(--color-black); }
.score-bar__fill--benchmark { background: var(--color-yellow); }

.score-bar__value { font-weight: 800; font-size: 1rem; }
.score-bar__label { font-size: 0.8rem; color: var(--color-text-muted); text-align: center; }

.score-guardrail {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.takeaway {
  margin-top: var(--space-4);
  font-weight: 700;
}

/* ==========================================================================
   Metric section
   ========================================================================== */
.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.metric-tile {
  background: var(--color-gray-light);
  border-radius: var(--radius-card);
  padding: var(--space-4);
}

.metric-tile__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.metric-tile__value {
  font-size: 1.8rem;
  font-weight: 800;
}

.metric-tile__sub {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.metric-empty {
  color: var(--color-text-muted);
  font-style: italic;
}

/* ==========================================================================
   CTA / close
   ========================================================================== */
.cta {
  text-align: left;
}

.cta__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

footer.page {
  padding: var(--space-5) 0 var(--space-7);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 480px) {
  .hero-band h1 { font-size: 1.6rem; }
  .stat-card { flex-direction: column; align-items: flex-start; }
  .stat-card__number { font-size: 2rem; }
  .tradeoff-bars { gap: var(--space-3); }
  .score-compare { gap: var(--space-3); }
  .metric-grid { grid-template-columns: 1fr; }
}

@media (max-width: 360px) {
  .page { padding-left: var(--space-3); padding-right: var(--space-3); }
  .hero-band__inner { padding-left: var(--space-3); padding-right: var(--space-3); padding-top: var(--space-7); }
  .card, .problem-card, .metric-tile { padding: var(--space-4); }
  .cost-chip { min-width: 72px; }
}