:root {
  --bg: #f4f6f8;
  --text: #222;
  --card-bg: #fff;
  --primary: #007bff;
  --border: #333;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a2e;
    --text: #eee;
    --card-bg: #16213e;
    --primary: #0f3460;
    --border: #777;
  }
}
* { box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background: var(--bg); color: var(--text); margin: 0; padding: 20px; display: flex; justify-content: center; min-height: 100vh; }
.screen { width: 100%; max-width: 900px; margin: 0 auto; }
/* Numpad Styles */
#login-screen { text-align: center; margin-top: 10vh; max-width: 350px; }
#passcode-display { font-size: 2rem; letter-spacing: 10px; margin: 20px 0; min-height: 40px; }
.numpad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.numpad button { font-size: 1.5rem; padding: 20px; border-radius: 50%; border: none; background: var(--card-bg); color: var(--text); box-shadow: 0 4px 6px rgba(0,0,0,0.1); cursor: pointer; }
.numpad button:active { opacity: 0.7; }
.action-btn { background: var(--primary) !important; color: #fff !important; font-size: 1.2rem !important; }
#login-error { color: #ff4d4d; margin-top: 15px; min-height: 20px; }
/* App Layout */
header { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--border); padding-bottom: 10px; margin-bottom: 20px; }
.logout-btn { background: #ff4d4d; color: white; border: none; padding: 8px 15px; border-radius: 5px; cursor: pointer; }
.summary-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; margin-bottom: 20px; }
.card { background: var(--card-bg); padding: 20px; border-radius: 8px; text-align: center; box-shadow: 0 2px 4px rgba(0,0,0,0.1); border: 1px solid var(--border); }
.add-trade-section { background: var(--card-bg); padding: 20px; border-radius: 8px; margin-bottom: 20px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
#add-trade-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
#add-trade-form input, #add-trade-form button { padding: 10px; border: 1px solid var(--border); border-radius: 4px; background: var(--bg); color: var(--text); }
#add-trade-form button { background: var(--primary); color: white; border: none; cursor: pointer; font-weight: bold; }
/* Table with ALL BORDERS */
.table-container { overflow-x: auto; background: var(--card-bg); padding: 10px; border-radius: 8px; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { border: 1px solid var(--border); padding: 12px; text-align: left; white-space: nowrap; }
th { background: rgba(0,0,0,0.05); }
@media (prefers-color-scheme: dark) { th { background: rgba(255,255,255,0.05); } }
.profit { color: #00cc66; font-weight: bold; }
.loss { color: #ff4d4d; font-weight: bold; }
</style>