*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; -webkit-text-size-adjust: 100%; }

.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); border: 0; }

.form-page { background: #fff8f0; color: #222; }
.form-page main { max-width: 32rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.form-page h1 { font-size: 1.75rem; margin: 0 0 1rem; }
.form-page label { display: block; font-weight: 600; margin: 1rem 0 0.35rem; }
.form-page input[type="text"], .form-page input[type="tel"], .form-page input[type="password"], .form-page textarea {
  width: 100%; font: inherit; font-size: 16px; padding: 0.75rem; border: 1px solid #ccc; border-radius: 0.6rem; background: #fff;
}
.form-page textarea { min-height: 8rem; resize: vertical; }

.toggle { display: flex; gap: 0.5rem; margin-top: 1.25rem; }
.toggle label { flex: 1; margin: 0; text-align: center; padding: 0.8rem; border: 2px solid #ff6b6b; border-radius: 0.6rem; color: #ff6b6b; }
.toggle label:has(input:checked) { background: #ff6b6b; color: #fff; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }

.btn { display: block; width: 100%; font: inherit; font-size: 1.05rem; font-weight: 700; padding: 0.9rem; margin-top: 1rem; border: 0; border-radius: 0.6rem; background: #ff6b6b; color: #fff; text-align: center; text-decoration: none; cursor: pointer; }
.btn.secondary { background: #fff; color: #ff6b6b; border: 2px solid #ff6b6b; }
.btn:disabled { opacity: 0.5; }

.preview { display: block; width: 100%; max-height: 50vh; margin-top: 1rem; border-radius: 0.6rem; background: #000; object-fit: contain; }
.preview-slide { position: relative; width: 100%; height: 100dvh; margin-top: 1rem; overflow: hidden; border-radius: 0.6rem; background: #000; }
.preview-slide-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.preview-slide .overlay .name:empty, .preview-slide .overlay .message:empty { display: none; }
.hint { color: #666; font-size: 0.9rem; margin: 0.35rem 0 0; }
.error { color: #c0392b; font-weight: 600; margin-top: 1rem; }
progress { width: 100%; height: 1rem; margin-top: 1rem; }
.done { text-align: center; padding-top: 20vh; }

.card-page { background: #000; color: #fff; }
.open { position: fixed; inset: 0; width: 100%; border: 0; background: linear-gradient(160deg, #ff6b6b, #5f6caf); color: #fff; font: inherit; font-size: 2rem; font-weight: 700; cursor: pointer; }
.feed { height: 100dvh; overflow-y: scroll; scroll-snap-type: y mandatory; overscroll-behavior: contain; }
.slide { position: relative; height: 100dvh; overflow: hidden; scroll-snap-align: start; scroll-snap-stop: always; background: #000; }
.slide video, .slide img { display: block; width: 100%; height: 100%; object-fit: cover; }
.text-only { display: flex; align-items: center; justify-content: center; padding: 2rem 1.5rem 7rem; }
.big-message { margin: 0; font-size: clamp(1.5rem, 6vw, 2.5rem); line-height: 1.3; text-align: center; white-space: pre-wrap; overflow-wrap: anywhere; }
.big-message.long { font-size: 1.15rem; text-align: left; }
.overlay { position: absolute; left: 0; right: 0; bottom: 0; padding: 4rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom)); background: linear-gradient(transparent, rgba(0, 0, 0, 0.75)); pointer-events: none; }
.overlay .name { margin: 0 0 0.25rem; font-size: 1.1rem; font-weight: 700; color: #fff; }
.overlay .message { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; color: #fff; }
.fallback { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem; height: 100%; padding: 2rem; text-align: center; }
.fallback a { color: #fff; font-weight: 700; }
.spinner { display: none; position: absolute; top: 50%; left: 50%; width: 2.5rem; height: 2.5rem; margin: -1.25rem 0 0 -1.25rem; border: 3px solid rgba(255, 255, 255, 0.3); border-top-color: #fff; border-radius: 50%; pointer-events: none; animation: spin 0.8s linear infinite; }
.slide.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
.empty { display: flex; align-items: center; justify-content: center; height: 100dvh; margin: 0; font-size: 1.25rem; }

.progress { position: fixed; top: 0; left: 0; right: 0; z-index: 2; padding: calc(0.6rem + env(safe-area-inset-top)) 0.75rem 0; pointer-events: none; }
.progress-bar { display: flex; gap: 0.25rem; }
.progress-segment { flex: 1; height: 0.2rem; border-radius: 0.15rem; background: rgba(255, 255, 255, 0.3); }
.progress-segment.filled { background: #fff; }
.progress-count { margin: 0.4rem 0 0; font-size: 0.8rem; font-weight: 600; color: #fff; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5); }