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

:root {
  --bg:       #0a0a0a;
  --surface:  #111111;
  --border:   #222222;
  --muted:    #444444;
  --text:     #e8e8e8;
  --dim:      #888888;
  --red:      #e63030;
  --red-dim:  #7a1a1a;
  --green:    #22c55e;
  --mono:     'IBM Plex Mono', monospace;
  --sans:     'IBM Plex Sans', sans-serif;
  --serif:    'Playfair Display', serif;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
}

/* ── Layout ───────────────────────────────────── */

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── Header ───────────────────────────────────── */

header {
  padding: 1.75rem 0 1.1rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

header img {
  height: 32px;
  width: auto;
  opacity: 0.9;
}

.header-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
  flex: 1;
}

/* ── Status bar ───────────────────────────────── */

.status-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--dim);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
  transition: background 0.4s ease;
}

.dot.connected {
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2.5s ease-in-out infinite;
}

.dot.error {
  background: var(--red);
  box-shadow: 0 0 6px var(--red);
}

@keyframes pulse {
  0%, 100% { opacity: 1;   box-shadow: 0 0 6px  var(--green); }
  50%       { opacity: 0.6; box-shadow: 0 0 14px var(--green); }
}

#status-text { flex: 1; }

.heartbeat-tick {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.2s;
}

.heartbeat-tick.flash { opacity: 1; }

/* ── Key form ─────────────────────────────────── */

.key-form {
  padding: 1.1rem 0 0.6rem;
  display: flex;
  gap: 0.6rem;
  align-items: stretch;
}

.key-input-wrap {
  flex: 1;
  position: relative;
  min-width: 0;
  display: flex;
}

.key-form input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.6rem 2.4rem 0.6rem 0.85rem;
  border-radius: 3px;
  outline: none;
  min-width: 0;
  width: 100%;
  transition: border-color 0.2s;
}

.key-form input::placeholder { color: var(--muted); }
.key-form input:focus { border-color: var(--dim); }

.eye-btn {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--muted);
  display: flex;
  align-items: center;
  transition: color 0.15s;
}

.eye-btn:hover { color: var(--dim); }

#connect-btn {
  background: var(--red);
  border: none;
  color: #fff;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.6rem 1.2rem;
  border-radius: 3px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
  letter-spacing: 0.03em;
}

#connect-btn:hover  { background: #c02020; }
#connect-btn:active { background: #a01010; }

#connect-btn.disconnect {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--dim);
}

#connect-btn.disconnect:hover {
  border-color: var(--red-dim);
  color: var(--red);
}

/* ── Feed ─────────────────────────────────────── */

.feed {
  flex: 1;
  padding: 0.5rem 0 2.5rem;
}

.feed-empty {
  padding: 3.5rem 0;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}

/* ── Message card ─────────────────────────────── */

.msg {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  animation: slideIn 0.35s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg.fresh {
  border-left: 2px solid var(--red);
  padding-left: 0.85rem;
}

.msg-meta {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.msg-time {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--dim);
  letter-spacing: 0.04em;
}

.msg-sender {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.msg-new-badge {
  font-family: var(--mono);
  font-size: 0.64rem;
  color: var(--red);
  background: var(--red-dim);
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.msg-headline {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}

.msg-body {
  font-family: var(--sans);
  font-size: 0.98rem;
  font-weight: 300;
  color: #aaa;
  line-height: 1.65;
  white-space: pre-wrap;
}

.msg-image {
  margin-top: 0.85rem;
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
}

/* ── Feed divider ─────────────────────────────── */

.feed-divider {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 0;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feed-divider::before,
.feed-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Scrollbar ────────────────────────────────── */

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Mobile ───────────────────────────────────── */

@media (max-width: 520px) {
  html, body     { font-size: 15px; }
  .msg-headline  { font-size: 1.15rem; }
  .key-form input,
  #connect-btn { font-size: 0.72rem; }
}