:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #09120f;
  color: #edf5f0;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  --panel: #101c18;
  --panel-raised: #14231d;
  --line: #293d34;
  --muted: #a0b5aa;
  --green: #45d6a2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  padding: clamp(14px, 4vw, 42px);
  background: radial-gradient(ellipse at 50% -15%, #1b4436 0, #0c1712 47%, #09120f 78%);
}

main { width: min(760px, 100%); margin: 0 auto; display: grid; gap: 15px; }
header, section { padding: clamp(19px, 4.5vw, 29px); background: rgb(16 28 24 / 94%); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 16px 42px #0003; }
header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
h1, h2, p { margin: 0; }
h1 { font-size: clamp(1.7rem, 6vw, 2.35rem); line-height: 1.1; letter-spacing: -.045em; }
h2 { font-size: 1.08rem; letter-spacing: -.015em; }
p { margin-top: 6px; color: var(--muted); line-height: 1.5; }
.step-label { color: var(--green); font-size: .72rem; font-weight: 800; letter-spacing: .12em; }
.session-status { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 8px; padding: 8px 11px; border: 1px solid #46564d; border-radius: 999px; background: #0a1510; color: #bac6bf; }
.status-text { display: inline-flex; align-items: center; gap: 7px; font-size: .85rem; font-weight: 750; white-space: nowrap; }
.status-text::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: #8c9b94; }
.status-text::after { content: "Not connected"; }
html[data-rw-connection="open"] .session-status[data-joined="true"] { border-color: #287253; color: var(--green); }
html[data-rw-connection="open"] .session-status[data-joined="true"] .status-text::before { background: var(--green); box-shadow: 0 0 12px #45d6a277; }
html[data-rw-connection="open"] .session-status[data-joined="true"] .status-text::after { content: "Connected"; }
html[data-rw-connection="connecting"] .session-status[data-joined="true"] .status-text::before,
html[data-rw-connection="reconnecting"] .session-status[data-joined="true"] .status-text::before { background: #f0bd66; }
html[data-rw-connection="connecting"] .session-status[data-joined="true"] .status-text::after { content: "Connecting"; }
html[data-rw-connection="reconnecting"] .session-status[data-joined="true"] .status-text::after { content: "Reconnecting"; }
html[data-rw-connection="closed"] .session-status[data-joined="true"] .status-text::after,
html[data-rw-connection="closing"] .session-status[data-joined="true"] .status-text::after { content: "Session joined · offline"; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
.section-heading h2 { margin-top: 5px; }
.section-heading p { font-size: .93rem; }
.latest-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 9px; }
.copy-button { min-height: 40px; padding: 8px 12px; gap: 8px; border-color: #40564a; background: #192a21; color: #e2eee7; }
.copy-button:hover:not(:disabled) { border-color: #5b7968; background: #22372b; }
.copy-button svg { width: 17px; height: 17px; fill: currentColor; }
.copy-status { color: var(--muted); font-size: .82rem; }
.step-label { margin-bottom: 3px; }
form { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto; gap: 11px; align-items: end; }
label:not(.upload-button) { display: grid; gap: 7px; color: #cfdbd4; font-size: .84rem; font-weight: 650; }
input, textarea, button, .upload-button { min-width: 0; min-height: 48px; border: 1px solid #385047; border-radius: 12px; background: #0a1510; color: inherit; padding: 12px 14px; font: inherit; }
input::placeholder, textarea::placeholder { color: #74887d; opacity: 1; }
.session-card input[name="room"] { text-transform: uppercase; letter-spacing: .08em; }
input:focus, textarea:focus { border-color: var(--green); outline: 3px solid rgb(69 214 162 / 17%); outline-offset: 1px; }
button, .upload-button { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; border-color: #20a979; background: #16845f; color: white; font-weight: 750; text-align: center; text-decoration: none; transition: background-color .15s ease, transform .15s ease; }
button:hover:not(:disabled), .upload-button:hover:not([aria-disabled="true"]) { background: #1ca879; }
button:active:not(:disabled), .upload-button:active { transform: translateY(1px); }
button:disabled, .upload-button[aria-disabled="true"] { cursor: not-allowed; opacity: .48; pointer-events: none; }
.session-card form output { grid-column: 1 / -1; }
.share-card form { grid-template-columns: minmax(0, 1fr); gap: 12px; }
textarea { width: 100%; min-height: 156px; resize: vertical; line-height: 1.55; }
.share-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.share-actions button, .upload-button { min-height: 44px; padding: 10px 16px; }
.upload-button { user-select: none; }
.shortcut-hint, .live-note { color: var(--muted); font-size: .85rem; }
.shortcut-hint { margin-left: auto; }
.upload-input { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; clip-path: inset(50%); }
.upload-input:focus-visible + output { outline: 2px solid var(--green); }
.upload-progress { display: grid; gap: 8px; margin-top: 12px; padding: 13px 14px; border: 1px solid #2b4739; border-radius: 12px; background: #0b1711; }
.upload-progress[hidden] { display: none; }
.upload-progress-heading { display: flex; justify-content: space-between; gap: 12px; color: #d5e2da; font-size: .88rem; }
.upload-progress-heading span:last-child { color: var(--green); font-variant-numeric: tabular-nums; }
.upload-progress progress { display: block; width: 100%; height: 10px; overflow: hidden; border: 0; border-radius: 999px; background: #263a2f; accent-color: var(--green); }
.upload-progress progress::-webkit-progress-bar { border-radius: 999px; background: #263a2f; }
.upload-progress progress::-webkit-progress-value { border-radius: 999px; background: var(--green); transition: width .12s linear; }
.upload-progress progress::-moz-progress-bar { border-radius: 999px; background: var(--green); }
.upload-progress output { color: var(--muted); font-size: .84rem; }
.live-note { padding: 6px 9px; border: 1px solid #315747; border-radius: 999px; color: var(--green); white-space: nowrap; }
output { display: block; color: #b9c9c0; line-height: 1.45; }
.preview { min-height: 100px; padding: 15px; overflow: auto; overflow-wrap: anywhere; background: #0a1510; border: 1px solid #263c32; border-radius: 14px; }
.empty-state { min-height: 68px; display: flex; align-items: center; gap: 12px; color: #92a69b; line-height: 1.45; }
.empty-icon { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid #385047; border-radius: 11px; color: var(--green); font-size: 1.3rem; }
.preview img { display: block; max-width: 100%; max-height: min(60vh, 520px); margin: 0 auto; border-radius: 9px; object-fit: contain; }
.image-item { display: grid; justify-items: start; gap: 12px; }
.file-item { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.file-name { font-weight: 750; overflow-wrap: anywhere; }
.file-meta { margin-top: 4px; color: var(--muted); font-size: .85rem; overflow-wrap: anywhere; }
.file-link { flex: 0 0 auto; color: var(--green); font-weight: 700; }
pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; line-height: 1.55; }

@media (max-width: 620px) {
  body { padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  main { gap: 11px; }
  header { align-items: flex-start; }
  .connection-badge { align-items: start; text-align: left; }
  form { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .session-card form button, .session-card form output { grid-column: 1 / -1; }
  .share-actions { align-items: stretch; }
  .share-actions button, .share-actions .upload-button { flex: 1 1 135px; }
  .shortcut-hint { width: 100%; margin-left: 0; }
  .file-item { align-items: flex-start; flex-direction: column; }
  .file-link { min-height: 42px; display: inline-flex; align-items: center; }
}

@media (max-width: 390px) {
  header { flex-direction: column; }
  .connection-badge { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
  form { grid-template-columns: minmax(0, 1fr); }
  .session-card form button, .session-card form output { grid-column: auto; }
  .share-actions { flex-direction: column; }
  .share-actions button, .share-actions .upload-button { width: 100%; }
  .shortcut-hint { text-align: center; }
  .section-heading { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}