/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --bg:          #05090f;
  --surface:     #0c1524;
  --surface2:    #111d2e;
  --surface3:    #172540;
  --border:      #1e3249;
  --primary:     #f0a22a;
  --primary-dk:  #c47d0e;
  --accent:      #e07b38;
  --accent2:     #b85c22;
  --text:        #e8ddc8;
  --text-dim:    #8a9bb0;
  --ai-bubble:   #0c1e35;
  --user-bubble: #162030;
  --gold-glow:   0 0 20px rgba(240, 162, 42, 0.15);
  --shadow:      0 4px 24px rgba(0,0,0,.5);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'Lato', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
}

/* ── #app ───────────────────────────────────────────────────────────────── */
#app { height: 100%; display: flex; flex-direction: column; }

/* ── Login Screen ───────────────────────────────────────────────────────── */
#login-screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 50% 40%, #0d1f3a 0%, var(--bg) 70%);
  min-height: 100vh;
}

.login-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  text-align: center;
  box-shadow: var(--shadow), var(--gold-glow);
}

.gem-large { font-size: 52px; display: block; margin-bottom: 12px; }
.login-inner h1, .landing-inner h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.brand-tag {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 22px;
  font-weight: 400;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.login-subtitle, .landing-subtitle {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 28px;
}

.field-group { text-align: left; margin-bottom: 16px; }
.field-group label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.field-group input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}
.field-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(240,162,42,.12);
}

.login-error {
  color: #f87171;
  font-size: 13px;
  margin-bottom: 12px;
  text-align: left;
}

.login-inner button[type="submit"],
.landing-inner #btn-start {
  width: 100%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #0d1b2a;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  padding: 14px 24px;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 8px;
  letter-spacing: 0.02em;
}
.login-inner button[type="submit"]:hover,
.landing-inner #btn-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(240,162,42,.35);
}
.login-inner button[type="submit"]:disabled,
.landing-inner #btn-start:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ── Landing ────────────────────────────────────────────────────────────── */
#landing {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 50% 40%, #0d1f3a 0%, var(--bg) 70%);
  min-height: 100vh;
}

.landing-inner {
  text-align: center;
  padding: 40px 32px;
  max-width: 520px;
  width: 100%;
}

.landing-desc {
  color: var(--text-dim);
  font-size: 15px;
  margin-bottom: 24px;
  line-height: 1.7;
}

.modules-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 28px;
}

.modules-preview span {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
}

.landing-hint {
  font-size: 12px;
  color: var(--border);
  margin-top: 16px;
}

/* ── Chat ───────────────────────────────────────────────────────────────── */
#chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-height: 100vh;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex-shrink: 0;
}
.header-gem { font-size: 22px; }
.header-title {
  font-family: 'Playfair Display', serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.header-center { flex: 1; }
.progress-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.6s ease;
  width: 0%;
}

.header-right { flex-shrink: 0; }
#modulo-badge {
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ── Messages ───────────────────────────────────────────────────────────── */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

#messages::-webkit-scrollbar { width: 5px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.msg { display: flex; gap: 12px; max-width: 780px; width: 100%; }
.msg.ai { align-self: flex-start; }
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg.sys { align-self: center; }

.msg-avatar {
  width: 36px;
  height: 36px;
  background: var(--surface3);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.msg-bubble {
  background: var(--ai-bubble);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  max-width: 720px;
}

.msg.user .msg-bubble {
  background: var(--user-bubble);
  border-color: var(--surface3);
}

.msg.sys .msg-bubble {
  background: rgba(240,162,42,.08);
  border-color: rgba(240,162,42,.2);
  color: var(--primary);
  font-size: 13px;
  text-align: center;
  border-radius: 8px;
}

/* Markdown inside AI bubbles */
.msg-bubble h1 { font-family: 'Playfair Display', serif; font-size: 22px; color: var(--primary); margin: 16px 0 10px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.msg-bubble h2 { font-family: 'Playfair Display', serif; font-size: 18px; color: var(--text); margin: 14px 0 8px; }
.msg-bubble h3 { font-size: 14px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.06em; margin: 12px 0 6px; }
.msg-bubble p { margin-bottom: 10px; }
.msg-bubble ul, .msg-bubble ol { margin: 6px 0 10px 20px; }
.msg-bubble li { margin-bottom: 4px; }
.msg-bubble strong { color: var(--primary); font-weight: 700; }
.msg-bubble em { color: var(--text-dim); }
.msg-bubble blockquote {
  border-left: 3px solid var(--primary);
  padding: 8px 16px;
  margin: 10px 0;
  background: rgba(240,162,42,.06);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-dim);
}
.msg-bubble hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }

/* ── Input Area ─────────────────────────────────────────────────────────── */
#input-area {
  padding: 16px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.input-group { display: flex; gap: 10px; align-items: flex-end; }

.input-group textarea {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  resize: none;
  min-height: 48px;
  max-height: 160px;
  transition: border-color 0.2s;
  line-height: 1.5;
}
.input-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(240,162,42,.1);
}
.input-group textarea::placeholder { color: var(--text-dim); }

#btn-send {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0d1b2a;
  border: none;
  border-radius: 12px;
  padding: 12px 22px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.2s;
  height: 48px;
}
#btn-send:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(240,162,42,.3);
}

/* ── Continue Button ────────────────────────────────────────────────────── */
.btn-continuar {
  width: 100%;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
  border-radius: 12px;
  padding: 14px 24px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.04em;
}
.btn-continuar:hover {
  background: var(--primary);
  color: #0d1b2a;
  box-shadow: 0 4px 20px rgba(240,162,42,.25);
}

/* ── PDF Buttons ────────────────────────────────────────────────────────── */
.module-pdf-wrap {
  margin-bottom: 10px;
}

.btn-pdf {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  border-radius: 10px;
  padding: 10px 18px;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-pdf-module {
  background: rgba(240,162,42,.1);
  border: 1px solid rgba(240,162,42,.3);
  color: var(--primary);
  width: 100%;
  justify-content: center;
  margin-bottom: 8px;
}
.btn-pdf-module:hover {
  background: rgba(240,162,42,.2);
  border-color: var(--primary);
}

.btn-pdf-final {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #0d1b2a;
  width: 100%;
  justify-content: center;
  font-size: 15px;
  padding: 14px 24px;
}
.btn-pdf-final:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(240,162,42,.4);
}

/* ── Done State ─────────────────────────────────────────────────────────── */
.done-wrap { display: flex; flex-direction: column; gap: 12px; }
.done-title {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  color: var(--primary);
  text-align: center;
  margin-bottom: 4px;
}
.btn-restart {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}
.btn-restart:hover { border-color: var(--text-dim); color: var(--text); }

/* ── Loading ────────────────────────────────────────────────────────────── */
.loading-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 4px;
  color: var(--text-dim);
  font-size: 14px;
}

.dots { display: flex; gap: 5px; align-items: center; flex-shrink: 0; }
.dots span {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  display: inline-block;
  animation: bounce 1.2s infinite ease-in-out;
}
.dots span:nth-child(2) { animation-delay: 0.2s; }
.dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%            { transform: scale(1.0); opacity: 1; }
}

/* ── Choice Buttons ─────────────────────────────────────────────────────── */
.choice-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.choice-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.choice-btn:hover {
  border-color: var(--primary);
  background: rgba(240,162,42,.06);
  color: var(--primary);
}
.choice-btn.selected {
  background: rgba(240,162,42,.12);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 700;
}

/* ── True/False ─────────────────────────────────────────────────────────── */
.vf-buttons { display: flex; gap: 12px; }
.vf-btn {
  flex: 1;
  border: 2px solid;
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.vf-icon { font-size: 18px; }

.vf-verdadeiro {
  background: rgba(52,211,153,.08);
  border-color: rgba(52,211,153,.4);
  color: #34d399;
}
.vf-verdadeiro:hover, .vf-verdadeiro.selected {
  background: rgba(52,211,153,.18);
  border-color: #34d399;
  box-shadow: 0 4px 16px rgba(52,211,153,.2);
}

.vf-falso {
  background: rgba(248,113,113,.08);
  border-color: rgba(248,113,113,.4);
  color: #f87171;
}
.vf-falso:hover, .vf-falso.selected {
  background: rgba(248,113,113,.18);
  border-color: #f87171;
  box-shadow: 0 4px 16px rgba(248,113,113,.2);
}

.vf-btn:disabled { opacity: 0.4; cursor: default; }

/* ── Scale ──────────────────────────────────────────────────────────────── */
.scale-wrap { display: flex; flex-direction: column; gap: 10px; }
.scale-label { font-size: 13px; color: var(--text-dim); }
.scale-buttons { display: flex; gap: 6px; flex-wrap: wrap; }

.scale-btn {
  width: 44px;
  height: 44px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.scale-btn:hover {
  border-color: var(--primary);
  background: rgba(240,162,42,.08);
}
.scale-btn.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: #0d1b2a;
  box-shadow: 0 3px 12px rgba(240,162,42,.3);
}

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

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .header-title { display: none; }
  .login-inner { padding: 36px 24px; margin: 16px; }
  .landing-inner { padding: 32px 20px; }
  #messages { padding: 16px 12px; }
  #input-area { padding: 12px; }
  .msg-bubble { font-size: 14px; padding: 12px 14px; }
  .vf-buttons { flex-direction: column; }
  .scale-btn { width: 36px; height: 36px; font-size: 13px; }
}