/* --- 1. ROOT & GLOBAL STYLES --- */
:root {
  --background-color: #1a1a1a;
  --text-color: #ffffff;
  --primary-blue: #007aff;
  --danger-red: #dc3545;
  --container-bg: rgba(0, 0, 0, 0.2);
  --container-border: rgba(255, 255, 255, 0.1);
  --chat-bubble-bot: rgba(58, 58, 60, 0.8);
  --chat-window-bg: rgba(28, 28, 30, 0.85);
  --touch-target-min: 44px;
}

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

html,
body {
  height: 100%;
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

body {
  background-color: var(--background-color);
  font-size: 16px; /* Base mobile font size */
  color: var(--text-color);
  padding-bottom: 80px; /* Space for fixed admin nav bar */
}

/* SAFARI-FRIENDLY FIXED BACKGROUND LAYER */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url("../assets/background.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  will-change: transform;
}

/* Lock page scroll while chat is open (toggled by script) */
body.chat-open {
  overflow: hidden;
}

/* --- Accessibility Helper Classes --- */
.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;
}
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-blue);
    color: white;
    padding: 8px;
    z-index: 9999;
    transition: top 0.3s ease;
}
.skip-link:focus {
    top: 0;
}


/* --- Animations --- */
@keyframes float {
  0% {
    transform: translateY(-5px);
  }
  100% {
    transform: translateY(5px);
  }
}
@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}
@keyframes shake {
  10%,
  90% {
    transform: translate3d(-1px, 0, 0);
  }
  20%,
  80% {
    transform: translate3d(2px, 0, 0);
  }
  30%,
  50%,
  70% {
    transform: translate3d(-4px, 0, 0);
  }
  40%,
  60% {
    transform: translate3d(4px, 0, 0);
  }
}

/* --- RESPONSIVE (CO-LOCATED) --- */
/* Progressively enhance font size for larger screens */

@media (min-width: 768px) {
  body {
    font-size: 17px;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }
}
/* Chat card thumbnails */
.message.bot-message .card-thumb {
  width: 300px;            /* crisp on retina; adjust 280–360 if you like */
  max-width: 45vw;         /* responsive on small screens */
  height: auto;            /* keep aspect ratio */
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,.35);
  display: block;
  image-rendering: auto;                 /* avoid pixelation */
  -webkit-image-rendering: -webkit-optimize-contrast;
}

/* Wrap multiple cards neatly */
.card-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-start;
}

/* Modal full-size preview */
#img-modal #img-full {
  max-width: 92vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;                    /* preserve aspect ratio */
  image-rendering: auto;
  -webkit-image-rendering: -webkit-optimize-contrast;
}

/* Safety: if you have any global img rules, keep chat images proportional */
.chat-window img { height: auto !important; }