#gk-kasse-app * { box-sizing: border-box; }
#gk-kasse-app {
  max-width: 900px;
  margin: 0 auto;
  background: #000;
  color: #f5f5f5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid #262626;
  min-height: 600px;
}
#gk-kasse-app .gk-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 24px;
  border-bottom: 1px solid #262626;
}
#gk-kasse-app .gk-header img { width: 46px; height: 46px; object-fit: contain; }
#gk-kasse-app .gk-eyebrow { font-size: 12px; letter-spacing: .3em; text-transform: uppercase; color: #f2b90c; font-weight: 600; margin: 0; }
#gk-kasse-app .gk-title { font-size: 22px; font-weight: 900; text-transform: uppercase; letter-spacing: -0.02em; margin: 2px 0 0; color: #f2b90c; }
#gk-kasse-app .gk-logout {
  margin-left: auto; background: #171717; border: 1px solid #333; color: #d4d4d4;
  font-size: 15px; padding: 10px 18px; border-radius: 10px; cursor: pointer;
}
#gk-kasse-app .gk-main { padding: 24px; }
#gk-kasse-app input {
  width: 100%;
  background: #171717;
  border: 1px solid #333;
  color: #f5f5f5;
  border-radius: 12px;
  padding: 16px 18px;
  font-size: 19px;
  margin-bottom: 16px;
}
#gk-kasse-app input:focus { outline: none; border-color: #f2b90c; }
#gk-kasse-app input.gk-pin { text-align: center; letter-spacing: .4em; font-size: 24px; max-width: 320px; margin: 0 auto 16px; }
#gk-kasse-app .gk-center { text-align: center; }
#gk-kasse-app .gk-hero-logo { width: 100px; height: 100px; object-fit: contain; margin: 0 auto 16px; display: block; }
#gk-kasse-app button.gk-primary {
  width: 100%; max-width: 320px; display: block; margin: 0 auto;
  background: #f2b90c; color: #000; font-weight: 800; border: none;
  border-radius: 12px; padding: 18px; font-size: 19px; cursor: pointer;
}
#gk-kasse-app button.gk-primary:active { background: #ffce33; }
#gk-kasse-app .gk-error { color: #f87171; font-size: 16px; text-align: center; margin: 0 0 16px; }
#gk-kasse-app .gk-member-list { display: flex; flex-direction: column; gap: 10px; max-height: 60vh; overflow-y: auto; }
#gk-kasse-app .gk-member-btn {
  display: flex; justify-content: space-between; align-items: center;
  background: #171717; border: 1px solid rgba(242,185,12,.3); border-radius: 12px;
  padding: 18px 20px; font-size: 19px; color: #f5f5f5; cursor: pointer; text-align: left;
}
#gk-kasse-app .gk-member-btn:active { background: #1f1f1f; border-color: rgba(242,185,12,.75); }
#gk-kasse-app .gk-member-btn .gk-balance-tag { font-family: monospace; font-size: 16px; }
#gk-kasse-app .gk-empty { text-align: center; color: #737373; font-size: 17px; padding: 40px 0; }
#gk-kasse-app .gk-customer-bar {
  display: flex; align-items: center; justify-content: space-between;
  background: #0a0a0a; border: 1px solid rgba(242,185,12,.3); border-radius: 14px;
  padding: 18px 22px; margin-bottom: 22px;
}
#gk-kasse-app .gk-customer-name { font-size: 22px; font-weight: 700; }
#gk-kasse-app .gk-customer-balance-label { font-size: 11px; text-transform: uppercase; letter-spacing: .2em; color: #737373; margin: 0 0 2px; }
#gk-kasse-app .gk-customer-balance { font-family: monospace; font-size: 26px; font-weight: 700; }
#gk-kasse-app .gk-back-btn {
  background: #171717; border: 1px solid #333; color: #d4d4d4;
  font-size: 16px; padding: 12px 20px; border-radius: 10px; cursor: pointer; margin-bottom: 20px;
}
#gk-kasse-app .gk-drink-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
#gk-kasse-app .gk-drink-btn {
  background: #171717; border: 1px solid rgba(242,185,12,.4); border-radius: 14px;
  padding: 28px 16px; text-align: center; cursor: pointer; color: #f5f5f5;
}
#gk-kasse-app .gk-drink-btn:active { background: #1f1f1f; border-color: rgba(242,185,12,.85); }
#gk-kasse-app .gk-drink-btn .gk-drink-name { font-weight: 700; font-size: 19px; display: block; margin-bottom: 6px; }
#gk-kasse-app .gk-drink-btn .gk-drink-price { color: #a3a3a3; font-size: 15px; }
#gk-kasse-app .gk-action-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
#gk-kasse-app .gk-action-btn {
  background: #171717; border: 1px solid #333; color: #f5f5f5;
  border-radius: 12px; padding: 16px 10px; font-size: 16px; font-weight: 600; cursor: pointer;
}
#gk-kasse-app .gk-action-btn:active { background: #1f1f1f; border-color: #f2b90c; }
#gk-kasse-app .gk-action-btn:disabled { opacity: .35; }
#gk-kasse-app .gk-panel {
  background: #0a0a0a; border: 1px solid #262626; border-radius: 14px;
  padding: 18px; margin-top: 16px;
}
#gk-kasse-app .gk-panel-title { font-size: 12px; text-transform: uppercase; letter-spacing: .15em; color: #737373; margin: 0 0 12px; }
#gk-kasse-app .gk-panel-row { display: flex; gap: 10px; }
#gk-kasse-app .gk-panel-row input { margin-bottom: 0; flex: 1; }
#gk-kasse-app .gk-panel-row button {
  flex-shrink: 0; background: #f2b90c; color: #000; font-weight: 700; border: none;
  border-radius: 10px; padding: 0 22px; font-size: 16px; cursor: pointer;
}
#gk-kasse-app .gk-history-list { list-style: none; padding: 0; margin: 0; max-height: 260px; overflow-y: auto; }
#gk-kasse-app .gk-history-list li {
  display: flex; justify-content: space-between; font-size: 15px;
  padding: 10px 0; border-bottom: 1px solid #171717;
}
#gk-kasse-app .gk-history-list li span:first-child { color: #d4d4d4; }
#gk-kasse-app .gk-toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  background: #f2b90c; color: #000; font-weight: 700; font-size: 17px;
  padding: 12px 26px; border-radius: 999px; z-index: 9999;
}
@media (max-width: 640px) {
  #gk-kasse-app .gk-drink-grid { grid-template-columns: 1fr 1fr; }
  #gk-kasse-app .gk-action-row { grid-template-columns: 1fr; }
}