@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --ink: #12131a;
  --panel: #191b24;
  --panel-raised: #20222e;
  --border: #2a2d3a;
  --text: #f5f3ee;
  --text-dim: #8a8d9a;
  --signal: #ff6b6b;
  --signal-dim: #7a2f2f;
  --online: #4ade80;
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
}

*:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.hidden { display: none !important; }

.screen { height: 100vh; width: 100vw; }

/* ---------- Sign-in / username screens ---------- */
#signin-screen, #username-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 700px 500px at 50% -10%, rgba(255,107,107,0.10), transparent 60%),
    var(--ink);
}

.signin-card {
  width: 360px;
  padding: 44px 36px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-align: center;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 6px;
}

.brand-mark {
  font-size: 22px;
  color: var(--signal);
  line-height: 1;
}

.brand-mark.large {
  font-size: 44px;
  display: block;
  margin-bottom: 14px;
}

.brand h1 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.tagline {
  color: var(--text-dim);
  font-size: 13.5px;
  margin: 0 0 30px;
  line-height: 1.5;
}

#username-input, #add-username-input, #message-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
  transition: border-color 0.15s;
}

#username-input:focus, #add-username-input:focus, #message-input:focus {
  border-color: var(--signal-dim);
}

.field-error {
  color: var(--signal);
  font-size: 12px;
  text-align: left;
  margin: -6px 0 14px;
}

.btn-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--signal);
  color: #1a0b0b;
  border: none;
  border-radius: 9px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:active { transform: scale(0.98); }

.btn-small { width: auto; padding: 10px 16px; }

.btn-secondary {
  width: 100%;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.btn-secondary:hover { border-color: var(--signal-dim); background: var(--panel-raised); }

/* ---------- App layout ---------- */
#app-screen { display: flex; }

.sidebar {
  width: 288px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.me { display: flex; align-items: center; gap: 11px; }

/* Signature element: presence pulse ring around avatars */
.avatar-wrap {
  position: relative;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--panel-raised);
  object-fit: cover;
  display: block;
}

.avatar-wrap.online::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 1.5px solid var(--online);
  animation: pulse-ring 2.2s ease-out infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.92); opacity: 0.9; }
  70% { transform: scale(1.18); opacity: 0; }
  100% { transform: scale(1.18); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .avatar-wrap.online::after { animation: none; opacity: 0.6; }
}

.me-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.me-status {
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.dot-online { background: var(--online); }
.dot-offline { background: var(--text-dim); }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 17px;
  cursor: pointer;
  padding: 5px 9px;
  border-radius: 7px;
  transition: color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--signal); background: var(--panel-raised); }

.sidebar-section { margin-bottom: 18px; }
.sidebar-section.grow { flex: 1; overflow-y: auto; }

.section-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 9px;
  font-weight: 600;
}

.add-person-panel {
  padding: 12px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 9px;
  margin-bottom: 18px;
}
.add-person-panel input { margin-bottom: 9px; }

.requests-list, .contacts-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.request-item, .contact-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 8px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  border: 1px solid transparent;
}
.contact-item:hover { background: var(--panel-raised); }
.contact-item.active { background: var(--panel-raised); border-color: var(--signal-dim); }

.request-item { background: var(--panel-raised); cursor: default; }

.item-name {
  font-family: var(--font-mono);
  font-size: 13px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.request-actions { display: flex; gap: 6px; }
.request-actions button {
  border: none;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 9px;
  cursor: pointer;
}
.accept-btn { background: var(--online); color: #072710; }
.decline-btn { background: var(--ink); color: var(--text-dim); }

.empty-note {
  color: var(--text-dim);
  font-size: 12px;
  padding: 7px 4px;
}

/* ---------- Chat pane ---------- */
.chat-pane { flex: 1; display: flex; flex-direction: column; }

.chat-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 14px;
  gap: 4px;
}

.chat-active { flex: 1; display: flex; flex-direction: column; height: 100vh; }

.chat-header {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-username {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
}

.chat-status { font-size: 11.5px; color: var(--text-dim); }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.msg-row { display: flex; }
.msg-row.mine { justify-content: flex-end; }

.msg-bubble {
  max-width: 60%;
  padding: 10px 14px;
  border-radius: 13px;
  font-size: 14px;
  line-height: 1.45;
  background: var(--panel-raised);
  border: 1px solid var(--border);
}
.msg-row.mine .msg-bubble { background: var(--signal-dim); border-color: var(--signal-dim); }

.msg-time {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 4px;
  display: block;
}

.message-form {
  display: flex;
  gap: 10px;
  padding: 18px 22px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.message-form input { margin-bottom: 0; flex: 1; }

.premium-badge {
  background: linear-gradient(135deg, var(--signal), #ffb86b);
  color: #1a0b0b;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  padding: 7px 10px;
  border-radius: 8px;
  margin-bottom: 10px;
  text-align: center;
}

.premium-note {
  font-size: 11.5px;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 6px 0 10px;
}

#redeem-code-input { margin-bottom: 8px; }

/* ---------- Admin ---------- */
.admin-link {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-dim);
  text-decoration: none;
  padding: 5px 9px;
  border-radius: 6px;
}
.admin-link:hover { color: var(--signal); background: var(--panel-raised); }

.admin-wrap {
  min-height: 100vh;
  padding: 40px 24px;
  display: flex;
  justify-content: center;
}

.admin-panel {
  width: 100%;
  max-width: 640px;
}

.admin-panel h1 {
  font-family: var(--font-display);
  font-size: 24px;
  margin: 0 0 6px;
}

.admin-panel .tagline { text-align: left; margin-bottom: 28px; }

.admin-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  margin-bottom: 16px;
}

.admin-card h2 {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0 0 14px;
}

.admin-stat-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 13px;
}
.admin-stat-row:last-child { border-bottom: none; }
.admin-stat-row span:last-child { color: var(--signal); font-weight: 600; }

.admin-user-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.admin-user-row:last-child { border-bottom: none; }
.admin-user-row .item-name { font-size: 13px; }
.admin-user-row button {
  border: none;
  border-radius: 6px;
  background: var(--signal-dim);
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  padding: 6px 10px;
  cursor: pointer;
}
.admin-user-row button:hover { filter: brightness(1.15); }

.admin-denied {
  text-align: center;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  padding-top: 100px;
}

@media (max-width: 720px) {
  #app-screen { flex-direction: column; }
  .sidebar { width: 100%; height: 40vh; border-right: none; border-bottom: 1px solid var(--border); }
  .chat-pane { height: 60vh; }
}