/* =========================
   RESET / BASE
========================= */
* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: #0b0f14;
  color: #fff;
  overflow: hidden; /* evita scroll extra no mobile */
}

/* =========================
   LAYOUT
========================= */
.wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.card {
  background: #121a24;
  border: 1px solid #223044;
  border-radius: 14px;
  padding: 16px;

  width: 100%;
  max-width: 420px;

  display: flex;
  flex-direction: column;
}

.hidden {
  display: none;
}

/* =========================
   TIPOGRAFIA
========================= */
h1, h2 {
  margin: 0 0 10px 0;
}

p {
  margin: 0 0 14px 0;
  opacity: .85;
}

.sub {
  font-size: 12px;
  opacity: .75;
}

/* =========================
   FORM / INPUT
========================= */
.row {
  display: flex;
  gap: 10px;
}

input,
textarea,
button {
  font-size: 16px; /* 🔑 evita zoom automático no mobile */
}

input {
  flex: 1;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #2b3b52;
  background: #0e1520;
  color: #fff;
  outline: none;
}

input::placeholder {
  color: #8aa0c2;
}

/* =========================
   BUTTONS
========================= */
button {
  padding: 12px 14px;
  border-radius: 10px;
  border: none;
  background: #2f7df6;
  color: #fff;
  cursor: pointer;
}

button:active {
  opacity: 0.9;
}

button.ghost {
  background: transparent;
  border: 1px solid #2b3b52;
}

/* =========================
   CHAT HEADER
========================= */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

/* =========================
   CHAT AREA
========================= */
.chat {
  flex: 1;
  overflow-y: auto;
  background: #0e1520;
  border: 1px solid #223044;
  border-radius: 12px;
  padding: 12px;

  -webkit-overflow-scrolling: touch;
}

/* =========================
   MESSAGES
========================= */
.bubble {
  max-width: 80%;
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 12px;
  line-height: 1.35;
  word-wrap: break-word;
}

.me {
  background: #1f3b66;
  margin-left: auto;
}

.ai {
  background: #1b2330;
  margin-right: auto;
  border: 1px solid #223044;
}

/* =========================
   COMPOSER
========================= */
.composer {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

/* =========================
   HINT / STATUS
========================= */
.hint {
  margin-top: 10px;
  font-size: 12px;
  opacity: .8;
}

/* =========================
   MOBILE FULLSCREEN
========================= */
@media (max-width: 600px) {
  .wrap {
    padding: 0;
  }

  .card {
    height: 100vh;
    max-width: 100%;
    border-radius: 0;
  }
}