*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0a0e0a;
  --surface:   #111711;
  --surface2:  #192119;
  --border:    #2a3a2a;
  --green:     #00d97e;
  --green-dim: rgba(0,217,126,0.15);
  --green-glow:rgba(0,217,126,0.35);
  --red:       #ff4d6a;
  --yellow:    #f5c542;
  --text:      #e8f5e8;
  --muted:     #6b856b;
  --radius:    12px;
}

html, body { height: 100%; font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); }

/* ── Screens ── */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; flex-direction: column; }

/* ── Welcome ── */
#screen-welcome { align-items: center; justify-content: center; text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,217,126,0.12) 0%, transparent 70%), var(--bg); }
.welcome-wrap { max-width: 560px; padding: 40px 24px; }
.stax-wordmark { font-size: 4rem; font-weight: 800; letter-spacing: -2px;
  color: var(--green); text-shadow: 0 0 40px var(--green-glow); margin-bottom: 8px; }
.welcome-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; text-transform: uppercase; letter-spacing: 2px; }
.welcome-headline { font-size: 2rem; font-weight: 700; line-height: 1.2; margin-bottom: 16px; }
.welcome-desc { color: var(--muted); font-size: 1rem; line-height: 1.6; margin-bottom: 36px; }

/* ── Buttons ── */
.btn-primary { background: var(--green); color: #000; font-family: 'Inter', sans-serif;
  font-weight: 700; font-size: 1rem; border: none; border-radius: 8px;
  padding: 14px 32px; cursor: pointer; transition: opacity 0.15s, transform 0.1s; }
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--muted); font-family: 'Inter', sans-serif;
  font-weight: 500; font-size: 0.95rem; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 20px; cursor: pointer; transition: color 0.15s; }
.btn-ghost:hover { color: var(--text); }
.btn-ghost:disabled { opacity: 0.3; cursor: default; }
.btn-invest { background: var(--green-dim); color: var(--green); border: 1px solid var(--green);
  font-family: 'Inter', sans-serif; font-size: 0.78rem; font-weight: 600; padding: 5px 10px;
  border-radius: 6px; cursor: pointer; transition: background 0.15s; white-space: nowrap; }
.btn-invest:hover { background: rgba(0,217,126,0.28); }
.btn-sell { background: rgba(255,77,106,0.12); color: var(--red); border: 1px solid var(--red);
  font-family: 'Inter', sans-serif; font-size: 0.78rem; font-weight: 600; padding: 5px 10px;
  border-radius: 6px; cursor: pointer; transition: background 0.15s; white-space: nowrap; }
.btn-sell:hover { background: rgba(255,77,106,0.22); }
.btn-small { font-family: 'Inter', sans-serif; font-size: 0.72rem; font-weight: 600;
  padding: 3px 8px; border-radius: 5px; cursor: pointer; border: 1px solid var(--red);
  background: rgba(255,77,106,0.12); color: var(--red); }

/* ── Tutorial ── */
#screen-tutorial { align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,217,126,0.08) 0%, transparent 60%), var(--bg); }
.tutorial-wrap { padding: 24px; width: 100%; max-width: 520px; }
.tutorial-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 48px 40px 36px; text-align: center; }
.tutorial-icon { font-size: 3rem; margin-bottom: 20px; }
.tutorial-card h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 14px; }
.tutorial-card p { color: var(--muted); line-height: 1.6; font-size: 1rem; margin-bottom: 36px; }
.tutorial-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.slide-dots { color: var(--muted); font-size: 0.85rem; flex: 1; text-align: center; }

/* ── Game HUD ── */
.game-hud { display: flex; align-items: center; gap: 20px; padding: 10px 20px;
  background: var(--surface); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.hud-logo { font-size: 1.4rem; font-weight: 800; color: var(--green); letter-spacing: -1px; margin-right: 8px; }
.hud-stat { display: flex; flex-direction: column; align-items: flex-start; }
.hud-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.hud-val { font-size: 1rem; font-weight: 700; }
.hud-val.green { color: var(--green); }
.hud-year-label { margin-left: auto; font-size: 0.8rem; color: var(--muted); }
.positive { color: var(--green); }
.negative { color: var(--red); }

/* ── Time Bar ── */
.timebar-track { height: 4px; background: var(--border); }
.timebar-fill { height: 4px; background: var(--green); width: 100%;
  transition: width 0.4s linear; box-shadow: 0 0 8px var(--green-glow); }

/* ── Game Body ── */
.game-body { display: flex; flex: 1; overflow: hidden; min-height: 0; }
.investments-area { flex: 1; overflow-y: auto; padding: 16px; }
.investments-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 14px; }

/* ── Investment Cards ── */
.investment-card { background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; }
.card-header { display: flex; align-items: center; gap: 10px; padding: 12px 14px;
  border-bottom: 1px solid var(--border); }
.card-icon { font-size: 1.2rem; }
.card-title { font-size: 0.9rem; font-weight: 600; flex: 1; }
.card-badge { font-size: 0.65rem; font-weight: 600; padding: 2px 8px; border-radius: 20px; }
.low-risk    { background: rgba(0,217,126,0.15); color: var(--green); }
.medium-risk { background: rgba(245,197,66,0.15); color: var(--yellow); }
.high-risk   { background: rgba(255,77,106,0.15); color: var(--red); }

.card-body { padding: 12px 14px; }
.card-stat { display: flex; justify-content: space-between; align-items: center;
  padding: 4px 0; font-size: 0.8rem; color: var(--muted); }
.card-val { color: var(--text); font-weight: 600; font-size: 0.85rem; }
.card-actions { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.card-actions input, .card-actions select {
  flex: 1; min-width: 0; background: var(--surface2); border: 1px solid var(--border);
  color: var(--text); font-family: 'Inter', sans-serif; font-size: 0.8rem;
  padding: 5px 8px; border-radius: 6px; }
.card-actions select { flex: unset; width: 100%; margin-bottom: 4px; }

/* ── CD / Bond list ── */
.cd-list { margin-top: 8px; display: flex; flex-direction: column; gap: 4px; }
.cd-item { display: flex; align-items: center; justify-content: space-between; gap: 6px;
  font-size: 0.75rem; color: var(--muted); background: var(--surface2);
  border-radius: 6px; padding: 5px 8px; }
.cd-progress { color: var(--green); font-weight: 600; }
.more-text { font-size: 0.72rem; color: var(--muted); text-align: center; padding-top: 2px; }

/* ── Sidebar ── */
.sidebar { width: 220px; flex-shrink: 0; border-left: 1px solid var(--border);
  overflow-y: auto; background: var(--surface); }
.sidebar details { border-bottom: 1px solid var(--border); }
.sidebar summary { padding: 12px 14px; font-size: 0.82rem; font-weight: 600;
  cursor: pointer; user-select: none; list-style: none; }
.sidebar summary::-webkit-details-marker { display: none; }
.sidebar summary::after { content: '▸'; float: right; color: var(--muted); transition: transform 0.2s; }
.sidebar details[open] summary::after { transform: rotate(90deg); }
.sidebar-body { padding: 8px 12px 14px; }

.portfolio-item { display: flex; justify-content: space-between; font-size: 0.78rem;
  padding: 4px 0; color: var(--muted); }
.portfolio-item span:last-child { color: var(--text); font-weight: 600; }
.portfolio-total { display: flex; justify-content: space-between; font-size: 0.82rem;
  font-weight: 700; padding: 8px 0 0; margin-top: 6px; border-top: 1px solid var(--border);
  color: var(--green); }
.leaderboard-item { display: flex; align-items: center; gap: 8px; padding: 5px 0; font-size: 0.78rem; }
.leaderboard-item.is-player { color: var(--green); font-weight: 600; }
.rank { width: 16px; font-weight: 700; color: var(--muted); }
.player-name { flex: 1; }
.player-worth { font-weight: 600; font-size: 0.76rem; }
.achievement-item { font-size: 0.78rem; padding: 3px 0; color: var(--yellow); }
.muted { color: var(--muted); font-size: 0.78rem; }

/* ── Modals ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.75);
  display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 24px; }
.modal-overlay.hidden { display: none; }
.modal-box { background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 40px 36px; max-width: 420px; width: 100%; text-align: center; }
.modal-emoji { font-size: 3rem; margin-bottom: 16px; }
.modal-box h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; }
.modal-box p { color: var(--muted); line-height: 1.6; margin-bottom: 20px; }
.event-amount { font-size: 2rem; font-weight: 800; margin-bottom: 24px; }
.event-amount.positive { color: var(--green); }
.event-amount.negative { color: var(--red); }

/* ── Toast ── */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--surface2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 20px; border-radius: 8px; font-size: 0.85rem; font-weight: 500;
  opacity: 0; transition: opacity 0.3s, transform 0.3s; z-index: 500; white-space: nowrap; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Results ── */
#screen-results { align-items: center; justify-content: flex-start; overflow-y: auto;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,217,126,0.1) 0%, transparent 60%), var(--bg); }
.results-wrap { max-width: 640px; width: 100%; padding: 48px 24px; margin: 0 auto; text-align: center; }
.results-headline { font-size: 2.5rem; font-weight: 800; margin: 8px 0 28px; }
.results-main-stat { background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 24px; margin-bottom: 16px; }
.results-main-stat span:first-child { display: block; color: var(--muted); font-size: 0.9rem; margin-bottom: 8px; }
.results-big { font-size: 2.8rem; font-weight: 800; color: var(--green); }
.results-projection { color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; }
.results-projection strong { color: var(--text); }
.results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 28px; }
.result-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px; text-align: left; }
.result-label { display: block; font-size: 0.72rem; color: var(--muted); text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 6px; }
.result-val { font-size: 1.15rem; font-weight: 700; color: var(--text); }
.versus-box { display: flex; align-items: center; gap: 16px; justify-content: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 24px; margin-bottom: 16px; }
.versus-item { text-align: center; }
.versus-label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 8px; }
.versus-worth { font-size: 1.5rem; font-weight: 800; color: var(--text); }
.versus-vs { font-size: 1rem; font-weight: 700; color: var(--muted); }
.verdict { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: var(--green); }

/* ── Responsive ── */
@media (max-width: 680px) {
  .sidebar { display: none; }
  .investments-grid { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
  .game-hud { gap: 12px; padding: 8px 12px; }
  .hud-logo { display: none; }
  .hud-year-label { display: none; }
}