:root {
  --bg: #0b1220;
  --card: #131f35;
  --accent: #38bdf8;
  --accent2: #3b82f6;
  --text: #eef4ff;
  --muted: #8ba3c7;
  --radius: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  /* Subtle party-popper watermark (matches the icon on the QR code)
     tiled over the existing gradient. Opacity is baked into the SVG
     itself (stroke-opacity) rather than applied via CSS, since CSS
     opacity on a background layer would need a separate pseudo-element.
     Deliberately no background-attachment: fixed — that's flaky/janky
     on iOS Safari, which is most of the audience here. */
  background-image:
    url("data:image/svg+xml;base64,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"),
    radial-gradient(circle at top, #1a2c4d, var(--bg) 60%);
  background-repeat: repeat, no-repeat;
  background-size: 110px 110px, auto;
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 96px;
}

header.top {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 18px 16px 14px;
  text-align: center;
  background: linear-gradient(180deg, rgba(11,18,32,0.97), rgba(11,18,32,0.85));
  backdrop-filter: blur(6px);
}

.lang-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 4px;
}

.lang-toggle button {
  background: var(--card);
  border: 1px solid #24334f;
  color: var(--muted);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.lang-toggle button.active {
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-color: transparent;
}

header.top h1 {
  margin: 0;
  font-size: 1.4rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

header.top p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 12px;
}

.upload-bar {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}

.upload-bar input[type="text"] {
  flex: 1;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid #24334f;
  background: var(--card);
  color: var(--text);
  font-size: 0.9rem;
}

.upload-bar input[type="text"]::placeholder { color: var(--muted); }

.btn {
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.fab-upload {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 20;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  border: none;
  font-size: 1.6rem;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.45);
  cursor: pointer;
}

.fab-upload:disabled { opacity: 0.6; cursor: not-allowed; }

.fab-upload.fab-secondary {
  right: 26px;
  bottom: 96px;
  width: 48px;
  height: 48px;
  font-size: 1.25rem;
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.35);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

@media (min-width: 560px) {
  .grid { grid-template-columns: 1fr 1fr 1fr; }
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: pop 0.35s ease;
}

@keyframes pop {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  cursor: pointer;
  background: #0a1220;
}

.card .thumb-wrap {
  position: relative;
  cursor: pointer;
  aspect-ratio: 1 / 1;
  background: #0a1220;
}

.card .thumb-wrap video,
.card .thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none; /* clicks go to the wrapper, which opens the modal */
}

.card .play-badge {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: white;
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}

.card .meta {
  padding: 8px 10px 10px;
  font-size: 0.78rem;
}

.card .who {
  font-weight: 600;
  color: var(--text);
}

.card .caption {
  color: var(--muted);
  margin: 2px 0 6px;
  word-break: break-word;
}

.card .actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.like-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 2px 4px;
}

.like-btn.liked { color: var(--accent); }

.comment-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
}

.empty .qr-hint {
  font-size: 2rem;
  margin-bottom: 8px;
}

/* Modal (photo detail + comments) */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 50;
}

.modal {
  background: var(--card);
  width: 100%;
  max-width: 520px;
  max-height: 88vh;
  overflow-y: auto;
  border-radius: 20px 20px 0 0;
  padding: 0 0 16px;
}

.modal img,
.modal video {
  width: 100%;
  max-height: 50vh;
  object-fit: contain;
  background: #000;
  display: block;
}

.modal video {
  /* Without this, a <video> with no metadata loaded yet can render
     at ~0 height on some mobile browsers, hiding its own controls
     before they ever get a chance to be tapped. */
  min-height: 200px;
}

.video-unsupported {
  width: 100%;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background: #000;
  color: var(--muted);
  font-size: 0.9rem;
}

.modal-body { padding: 14px 16px 0; }

.modal-close {
  position: sticky;
  top: 0;
  float: right;
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  border-radius: 50%;
  width: 34px;
  height: 34px;
  font-size: 1rem;
  cursor: pointer;
  margin: 10px;
}

.comment-list { margin: 10px 0; display: flex; flex-direction: column; gap: 8px; }

.comment {
  background: #13223d80;
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 0.85rem;
}

.comment .cname { font-weight: 600; margin-right: 6px; }
.comment .ctext { color: var(--muted); }

.comment-form {
  display: flex;
  gap: 6px;
  margin-top: 10px;
}

.comment-form input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid #24334f;
  background: #13223d80;
  color: var(--text);
  font-size: 0.85rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 100px;
  transform: translateX(-50%);
  background: var(--accent2);
  color: white;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  z-index: 60;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.toast.show { opacity: 1; }

.nav-link {
  display: inline-block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  text-decoration: none;
  border-bottom: 1px dotted var(--muted);
}

/* ---------------- Slideshow page ---------------- */
body.slideshow {
  padding: 0;
  margin: 0;
  background: #000;
  overflow: hidden;
  height: 100vh;
}

.slide-stage {
  position: relative;
  width: 100vw;
  height: 100vh;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 1s ease;
}

.slide.active { opacity: 1; }

.slide img,
.slide video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.slide-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 40px;
  background: linear-gradient(0deg, rgba(0,0,0,0.75), transparent);
  color: white;
  font-size: 1.6rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.slide-caption .likes { font-size: 1.2rem; color: var(--accent); white-space: nowrap; }

.slide-empty {
  color: white;
  text-align: center;
  font-size: 2rem;
  opacity: 0.7;
}