/* Anonymous Chat — mobile-first dark UI */

:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1f232d;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --text-dim: #8b93a3;
  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --danger: #ff5c5c;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 640px;
  margin: 0 auto;
}

/* ---- Screens ---- */
.screen { display: none; flex: 1; flex-direction: column; padding: 0 16px calc(16px + var(--safe-bottom)); }
.screen.active { display: flex; }

#screen-landing, #screen-waiting { justify-content: center; align-items: center; padding-top: var(--safe-top); }

.card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}

.logo { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 6px; }
.tagline { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 22px; }

label { display: block; text-align: left; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 6px; }

input[type="text"] {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}
input[type="text"]:focus { border-color: var(--accent); }
input[type="text"]:disabled { opacity: 0.5; }

.hint { color: var(--text-dim); font-size: 0.8rem; margin-top: 6px; }

button {
  font: inherit;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  padding: 12px 16px;
  font-size: 1rem;
  transition: background 0.15s, opacity 0.15s;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

.primary { background: var(--accent); color: #fff; font-weight: 600; width: 100%; margin-top: 18px; }
.primary:hover:not(:disabled) { background: var(--accent-hover); }
.primary.small { width: auto; margin-top: 0; padding: 10px 16px; }

.ghost { background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.ghost:hover:not(:disabled) { color: var(--text); border-color: var(--text-dim); }
.ghost.small { padding: 8px 12px; font-size: 0.9rem; border-radius: 8px; }

.legal { margin-top: 22px; color: var(--text-dim); font-size: 0.72rem; line-height: 1.5; }

/* ---- Waiting ---- */
.waiting-card { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.spinner {
  width: 44px; height: 44px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin-bottom: 14px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Chat ---- */
.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(12px + var(--safe-top)) 4px 10px;
  border-bottom: 1px solid var(--border);
}
.partner-name { font-weight: 700; font-size: 1.05rem; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 4px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.msg { max-width: 78%; padding: 9px 13px; border-radius: 14px; font-size: 0.95rem; line-height: 1.4; word-wrap: break-word; overflow-wrap: anywhere; }
.msg .sender { display: block; font-size: 0.7rem; color: var(--text-dim); margin-bottom: 2px; }
.msg.mine { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.msg.mine .sender { color: rgba(255,255,255,0.75); text-align: right; }
.msg.theirs { align-self: flex-start; background: var(--surface-2); border: 1px solid var(--border); border-bottom-left-radius: 4px; }

.msg .text { white-space: pre-wrap; }
.msg .time { display: block; font-size: 0.66rem; color: var(--text-dim); margin-top: 3px; text-align: right; }
.msg.mine .time { color: rgba(255,255,255,0.6); }

/* ---- Banner (offline / info) ---- */
.banner {
  margin: 0 4px 8px;
  padding: 8px 12px;
  border-radius: 8px;
  background: #3a2f12;
  border: 1px solid #6b5518;
  color: #f0d98c;
  font-size: 0.8rem;
  text-align: center;
}
.banner.error { background: #3a1717; border-color: #7a2626; color: #ffb3b3; }
.banner.hidden { display: none; }

/* ---- Composer ---- */
.composer {
  display: flex; gap: 8px;
  padding: 10px 0 calc(10px + var(--safe-bottom));
  border-top: 1px solid var(--border);
}
.composer input { flex: 1; }

/* Thin scrollbars */
.messages::-webkit-scrollbar { width: 6px; }
.messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }