:root {
  --bg: #090F15;
  --panel: #0E1720;
  --panel-hover: #14202B;
  --border: rgba(150,180,205,.15);
  --text: #F5F8FC;
  --muted: #91A3B5;
  --accent: #5ED6BF;
  --info: #5CA8FF;
  --success: #4FD39C;
  --warning: #F4B860;
  --danger: #EF6B78;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 20px 60px rgba(0,0,0,.25);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  font-synthesis: none;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; font-family: inherit; }
button, input { font: inherit; }
button { cursor: pointer; }

.guest-page { display: grid; min-height: 100vh; place-items: center; padding: 20px; }
.guest-card { width: min(720px, 100%); padding: clamp(24px, 5vw, 44px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(145deg, rgba(20,32,43,.96), rgba(14,23,32,.98)); box-shadow: var(--shadow); }

.guest-header { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
.brand-mark { display: grid; width: 48px; height: 48px; flex: 0 0 auto; place-items: center; border: 1px solid rgba(94,214,191,.5); border-radius: 15px; background: linear-gradient(135deg, rgba(94,214,191,.23), rgba(92,168,255,.18)); color: var(--accent); font-size: 25px; font-weight: 900; box-shadow: 0 0 30px rgba(94,214,191,.15); }
.eyebrow { margin: 0 0 7px; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 0; color: var(--text); font-size: clamp(27px, 5vw, 38px); letter-spacing: -.05em; }

.guest-message { margin-bottom: 16px; padding: 12px 14px; border: 1px solid; border-radius: var(--radius-md); font-size: 13px; line-height: 1.5; }
.guest-message.error { border-color: rgba(239,107,120,.42); color: #FFC9CE; background: rgba(239,107,120,.09); }
.guest-message.warning { border-color: rgba(244,184,96,.34); color: #F8D88E; background: rgba(244,184,96,.08); }

/* Security indicator */
.guest-security { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: var(--radius-md); margin-bottom: 16px; font-size: 12px; font-weight: 600; }
.guest-security.secure { border: 1px solid rgba(79,211,156,.4); background: rgba(79,211,156,.12); color: var(--success); }
.guest-security.insecure { border: 1px solid rgba(244,184,96,.4); background: rgba(244,184,96,.1); color: var(--warning); }

/* Steps */
.guest-step { animation: fadeIn .2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.step-title { display: flex; align-items: center; gap: 10px; margin: 0 0 6px; font-size: 18px; }
.step-badge { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: var(--accent); color: #06110D; font-weight: 900; font-size: 13px; }
.step-hint { margin: 0 0 18px; color: var(--muted); font-size: 13px; line-height: 1.5; }

/* Dropzone */
.guest-dropzone { display: grid; min-height: 260px; place-items: center; align-content: center; gap: 12px; border: 1px dashed rgba(94,214,191,.42); border-radius: var(--radius-md); background: rgba(94,214,191,.045); color: #dce8f1; text-align: center; outline: none; transition: border-color .2s, background .2s, transform .2s; }
.guest-dropzone:hover, .guest-dropzone:focus-visible, .guest-dropzone.dragover { border-color: var(--accent); background: rgba(94,214,191,.105); transform: translateY(-2px); }
.guest-dropzone strong { font-size: 16px; }
.guest-dropzone span { color: var(--muted); font-size: 12px; }
.guest-dropzone small { margin-top: 6px; color: #708392; font-size: 11px; }
.drop-icon { display: grid; width: 64px; height: 64px; place-items: center; border-radius: 18px; background: rgba(94,214,191,.14); color: var(--accent); font-size: 32px; }

/* Buttons */
.primary-button, .secondary-button, .danger-button, .ghost-button {
  border: 0; border-radius: var(--radius-sm); padding: 12px 18px; font-weight: 700; font-size: 13px; transition: filter .2s, background .2s;
}
.primary-button { color: #06110D; background: linear-gradient(135deg, var(--accent), #3FB89F); }
.primary-button:hover { filter: brightness(1.08); }
.primary-button:disabled { opacity: .5; cursor: not-allowed; filter: none; }
.secondary-button { color: var(--text); background: rgba(150,180,205,.12); border: 1px solid var(--border); }
.secondary-button:hover { background: rgba(150,180,205,.22); border-color: var(--accent); }
.danger-button { color: #1A0B0D; background: linear-gradient(135deg, var(--danger), #D2505E); }
.danger-button:hover { filter: brightness(1.08); }
.ghost-button { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.ghost-button:hover { border-color: var(--accent); color: var(--accent); }

/* Selected files */
.guest-selected { margin-top: 20px; }
.selected-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; font-size: 14px; }
.selected-header .muted { font-size: 12px; }
.selected-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }

/* Grid */
.guest-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
@media (max-width: 500px) { .guest-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 700px) { .guest-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1000px) { .guest-grid { grid-template-columns: repeat(5, 1fr); } }

.file-card { display: grid; gap: 8px; padding: 10px; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(14,23,32,.6); transition: transform .2s, border-color .2s; }
.file-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.file-thumb { aspect-ratio: 1; border-radius: var(--radius-sm); overflow: hidden; background: #090F15; display: grid; place-items: center; }
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }
.file-thumb .icon { font-size: 32px; }
.file-name { font-size: 11px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { display: flex; gap: 6px; color: var(--muted); font-size: 10px; }
.file-remove { justify-self: end; width: 28px; height: 28px; border: 1px solid var(--border); border-radius: 50%; background: transparent; color: var(--muted); font-size: 16px; line-height: 1; }
.file-remove:hover { border-color: var(--danger); color: var(--danger); }

/* Buttons in selected header */
.secondary-button { padding: 10px 14px; font-size: 12px; }
.primary-button { padding: 12px 18px; }
.danger-button { padding: 10px 14px; color: #1A0B0D; background: linear-gradient(135deg, var(--danger), #D2505E); }

/* Upload progress */
.guest-upload-queue { display: grid; gap: 10px; margin-top: 8px; }
.upload-item { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 14px; align-items: center; padding: 14px; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(14,23,32,.6); }
.upload-copy { min-width: 0; }
.upload-copy strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.upload-meta { display: flex; gap: 10px; margin-top: 4px; color: var(--muted); font-size: 11px; }
.upload-progress { height: 6px; margin-top: 10px; overflow: hidden; border-radius: 9px; background: #232F3B; }
.upload-progress span { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--accent); transition: width .2s; }
.upload-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.upload-actions .small-button { padding: 8px 12px; font-size: 11px; }

.upload-summary { display: flex; justify-content: space-between; margin: 16px 0 8px; font-size: 13px; font-weight: 600; }
.total-progress-bar { height: 8px; border-radius: 9px; background: #232F3B; overflow: hidden; margin-bottom: 16px; }
.total-progress-bar span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--info)); transition: width .3s; }

.upload-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.small-button { padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: rgba(24,34,46,.85); color: #c4d1dc; font-size: 12px; font-weight: 600; }
.small-button:hover { border-color: rgba(94,214,191,.5); color: var(--text); }

/* Done state */
.done-summary { text-align: center; margin-bottom: 24px; }
.done-icon { width: 72px; height: 72px; margin: 0 auto 16px; place-items: center; display: grid; border-radius: 50%; background: rgba(79,211,156,.15); color: var(--success); font-size: 36px; font-weight: 900; }
.done-summary h3 { margin: 0 0 6px; font-size: 22px; }
.done-summary .muted { font-size: 14px; }
.done-list { display: grid; gap: 8px; margin-bottom: 24px; max-height: 300px; overflow-y: auto; }
.done-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: rgba(14,23,32,.5); font-size: 12px; }
.done-item .icon { width: 28px; height: 28px; flex: 0 0 auto; border-radius: 6px; display: grid; place-items: center; background: var(--panel); font-size: 16px; }
.done-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.done-item .size { color: var(--muted); font-size: 11px; }
.done-actions { display: flex; justify-content: center; }

.selected-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }
.primary-button { width: auto; min-width: 180px; }
.secondary-button { min-width: 120px; }

/* Footer */
.guest-footer { margin-top: 28px; color: #718393; font-size: 11px; text-align: center; line-height: 1.6; }
.guest-footer a { color: var(--info); text-decoration: none; }
.guest-footer a:hover { text-decoration: underline; }

/* Status line */
.guest-status-line { display: flex; align-items: center; gap: 10px; margin-top: 20px; color: var(--muted); font-size: 11px; flex-wrap: wrap; }
.guest-status-line span:last-child { margin-left: auto; color: var(--accent); }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #788493; }
.status-dot.online { background: var(--accent); box-shadow: 0 0 0 4px rgba(94,214,191,.11); }

/* Responsive */
@media (max-width: 560px) {
  .guest-page { padding: 12px; }
  .guest-card { border-radius: 14px; padding: 20px; }
  .selected-actions { justify-content: stretch; }
  .selected-actions button { flex: 1; text-align: center; }
  .upload-actions { justify-content: stretch; }
  .upload-actions button { flex: 1; text-align: center; }
  .selected-actions { flex-direction: column; }
  .selected-actions .primary-button { width: 100%; }
  .selected-actions .secondary-button { width: 100%; }
}