/* =============================================
   CHAT DO CLIENTE — NP Empréstimos
   ============================================= */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --purple: #5420a4;
  --purple-dk: #330d78;
  --teal: #14b8a6;
  --teal-lt: #2dd4bf;
  --white: #ffffff;
  --surface: #f1f5f9;
  --text: #1a0a3b;
  --text-2: #64748b;
  --border: #e2e8f0;
  --bg-msg-client: #5420a4;
  --bg-msg-admin: #ffffff;
  --font: 'Inter', system-ui, sans-serif;
}

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

/* ---- Screens ---- */
.screen {
  display: none;
  width: 100%;
  min-height: 100vh;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

/* ==========================================
   FORMULÁRIO INICIAL
   ========================================== */
#screen-form {
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: linear-gradient(145deg, #1a0a3b, #330d78);
  min-height: 100vh;
}

.form-wrapper {
  background: #fff;
  border-radius: 1.5rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 560px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: form-in .5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes form-in {
  from {
    opacity: 0;
    transform: translateY(2rem) scale(0.97);
  }
}

.form-header {
  text-align: center;
  margin-bottom: 2rem;
}

.form-logo {
  width: 3rem;
  margin: 0 auto 1rem;
  filter: brightness(.5);
}

.form-header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--purple-dk);
  margin-bottom: .5rem;
}

.form-header p {
  font-size: .9rem;
  color: var(--text-2);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  flex: 1;
}

.field-group label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.field-row {
  display: flex;
  gap: 1rem;
}

input,
select {
  padding: .7rem .9rem;
  border: 1.5px solid var(--border);
  border-radius: .6rem;
  font-size: .9rem;
  font-family: var(--font);
  color: var(--text);
  background: #fafafa;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(84, 32, 164, .12);
  background: #fff;
}

.form-privacy {
  font-size: .75rem;
  color: var(--text-2);
  text-align: center;
  padding: .5rem;
  background: #f8fafc;
  border-radius: .5rem;
}

.btn-start {
  width: 100%;
  padding: .9rem;
  background: var(--purple);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: .75rem;
  cursor: pointer;
  transition: background .2s, transform .2s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(84, 32, 164, .3);
  margin-top: .5rem;
}

.btn-start:hover {
  background: #6b31c4;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(84, 32, 164, .4);
}

.btn-start:active {
  transform: translateY(0);
}

.btn-start:disabled {
  opacity: .7;
  cursor: default;
  transform: none;
}

/* ==========================================
   CHAT
   ========================================== */
#screen-chat {
  height: 100dvh;
  background: var(--surface);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  background: var(--purple-dk);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  position: sticky;
  top: 0;
  z-index: 10;
  flex-shrink: 0;
}

.back-btn {
  color: rgba(255, 255, 255, .7);
  font-size: 1.2rem;
  text-decoration: none;
  padding: .25rem .5rem;
  border-radius: .4rem;
  transition: background .2s;
}

.back-btn:hover {
  background: rgba(255, 255, 255, .1);
  color: #fff;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex: 1;
}

.chat-avatar {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--teal-lt));
  color: #0a2e2a;
  font-size: .75rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.chat-header-info strong {
  display: block;
  font-size: .9rem;
  color: #fff;
  font-weight: 600;
}

.chat-header-info span {
  font-size: .72rem;
  color: var(--teal-lt);
}

.btn-icon {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, .5);
  font-size: 1rem;
  cursor: pointer;
  padding: .4rem;
  border-radius: .4rem;
  transition: all .2s;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, .1);
  color: #fff;
}

/* Mensagens */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  scroll-behavior: smooth;
}

.chat-day-divider {
  text-align: center;
  font-size: .72rem;
  color: var(--text-2);
  margin: .75rem 0;
  position: relative;
}

.chat-day-divider::before,
.chat-day-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 35%;
  height: 1px;
  background: var(--border);
}

.chat-day-divider::before {
  left: 0;
}

.chat-day-divider::after {
  right: 0;
}

.msg {
  display: flex;
  flex-direction: column;
  max-width: 75%;
  animation: msg-in .2s both;
}

@keyframes msg-in {
  from {
    opacity: 0;
    transform: translateY(.5rem);
  }
}

.msg--client {
  align-self: flex-end;
  align-items: flex-end;
}

.msg--admin {
  align-self: flex-start;
  align-items: flex-start;
}

.msg-bubble {
  padding: .65rem .9rem;
  border-radius: 1rem;
  font-size: .9rem;
  line-height: 1.5;
  word-break: break-word;
}

.msg--client .msg-bubble {
  background: var(--bg-msg-client);
  color: #fff;
  border-bottom-right-radius: .25rem;
}

.msg--admin .msg-bubble {
  background: var(--bg-msg-admin);
  color: var(--text);
  border-bottom-left-radius: .25rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .08);
}

.msg.optimistic .msg-bubble {
  opacity: .75;
}

.msg-time {
  font-size: .65rem;
  color: var(--text-2);
  margin-top: .2rem;
  padding-inline: .2rem;
}

/* Input bar */
.chat-input-bar {
  display: flex;
  gap: .75rem;
  padding: .75rem 1rem;
  background: #fff;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-input-bar input {
  flex: 1;
  padding: .65rem 1rem;
  border: 1.5px solid var(--border);
  border-radius: 2rem;
  background: var(--surface);
  font-size: .92rem;
}

.chat-input-bar input:focus {
  border-color: var(--purple);
  box-shadow: 0 0 0 3px rgba(84, 32, 164, .1);
}

.btn-send {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: var(--purple);
  color: #fff;
  display: grid;
  place-items: center;
  border: none;
  cursor: pointer;
  transition: background .2s, transform .2s var(--ease-spring, cubic-bezier(.34, 1.56, .64, 1));
  flex-shrink: 0;
}

.btn-send:hover {
  background: #6b31c4;
  transform: scale(1.08);
}

.btn-send:active {
  transform: scale(0.95);
}

/* Util */
.hidden {
  display: none !important;
}

/* Mobile */
@media (max-width: 480px) {
  .form-wrapper {
    padding: 1.75rem 1.25rem;
    border-radius: 1.25rem;
  }

  .field-row {
    flex-direction: column;
    gap: .75rem;
  }

  .form-header h1 {
    font-size: 1.3rem;
  }
}