:root {
  --k-black: #000000;
  --k-teal: #005682;
  --k-indigo: #000739;
  --k-sand: #FFE8DB;
  --font-main: 'Inter', sans-serif;
}

body {
  background-color: var(--k-black);
  color: var(--k-sand);
  font-family: var(--font-main);
  margin: 0;
  overflow-x: hidden;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* System Scan Animation */
.k-scanner {
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--k-teal);
  box-shadow: 0 0 15px var(--k-teal);
  top: -10%;
  z-index: 10;
  animation: scan 4s linear infinite;
}

@keyframes scan {
  0% { top: 0%; opacity: 0; }
  50% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.k-container { max-width: 1200px; margin: 0 auto; padding: 2rem; }

.k-btn {
  background: var(--k-teal);
  color: var(--k-black);
  border: none;
  padding: 1rem 2rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.3s;
}

.k-btn:hover { background: var(--k-sand); }

.k-size-btn {
    background: transparent;
    border: 1px solid var(--k-indigo);
    color: var(--k-sand);
    padding: 10px 20px;
    font-family: var(--font-tech);
    transition: all 0.3s ease;
    text-align: center;
    min-width: 80px;
}

.k-size-btn:hover:not(:disabled) {
    border-color: var(--k-teal);
    background: rgba(0, 86, 130, 0.1);
}

.k-depleted {
    opacity: 0.3;
    cursor: not-allowed;
    text-decoration: line-through;
    border-style: dashed;
}

/* Active Size Button Highlight */
.active-selection {
    border-color: var(--k-teal) !important;
    background: rgba(0, 86, 130, 0.15) !important;
    box-shadow: 0 0 15px rgba(0, 86, 130, 0.4);
}

/* The "System Ready" Pulse */
.k-pulse-active {
    opacity: 1 !important;
    background-color: var(--k-teal) !important;
    color: #fff !important;
    animation: k-pulse-glow 2s infinite;
    cursor: pointer;
}

@keyframes k-pulse-glow {
    0% { box-shadow: 0 0 0 0 rgba(0, 86, 130, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(0, 86, 130, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 86, 130, 0); }
}

/* Disabled State */
.k-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border: 1px solid var(--k-indigo);
}

.k-size-selector{color:car(k--sand);}