/* Sócraken — Paleta Antigua Atenas
   Mármol #9CA3AF · Dorado #C9A227 · Hueso #F5F0E1 · Bronce #B7791F · Grafito #1F2937 · Papiro #EDE7D9 */
:root {
  --marmol: #9CA3AF;
  --dorado: #C9A227;
  --dorado-oscuro: #A88A1E;
  --dorado-claro: #D4B33A;
  --hueso: #F5F0E1;
  --bronce: #B7791F;
  --grafito: #1F2937;
  --grafito-claro: #374151;
  --papiro: #EDE7D9;
  --blanco: #FFFFFF;
  --negro: #111827;
  --sombra: rgba(31, 41, 55, 0.12);
  --sombra-fuerte: rgba(31, 41, 55, 0.25);
  --radio: 12px;
  --radio-sm: 8px;
  --trans: 0.18s ease;
  --header-h: 72px;
  --inputbar-h: 72px;
}

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

html, body { height: 100%; }

body {
  font-family: 'Montserrat', system-ui, sans-serif;
  background: var(--papiro);
  color: var(--grafito);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: 'Playfair Display', Georgia, serif; font-weight: 700; color: var(--grafito); }

a { color: var(--bronce); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== TIPOGRAFÍA ===== */
.brand-title { font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.15; letter-spacing: -0.02em; }
.brand-title.small { font-size: clamp(1.1rem, 2.5vw, 1.35rem); }
.brand-sub { font-size: 0.95rem; color: var(--marmol); font-weight: 400; }
.brand-sub.small { font-size: 0.8rem; color: var(--marmol); }
.brand-mark { font-size: 2rem; line-height: 1; }
.brand-mark.small { font-size: 1.35rem; }

/* ===== BOTONES ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.7rem 1.25rem; border-radius: var(--radio);
  font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: 0.95rem;
  border: 2px solid transparent; cursor: pointer; transition: all var(--trans);
  white-space: nowrap;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary {
  background: var(--dorado); color: var(--negro); border-color: var(--dorado);
  box-shadow: 0 2px 8px rgba(201, 162, 39, 0.35);
}
.btn-primary:hover:not(:disabled) {
  background: var(--dorado-oscuro); border-color: var(--dorado-oscuro);
  transform: translateY(-1px); box-shadow: 0 4px 14px rgba(201, 162, 39, 0.45);
}
.btn-ghost {
  background: transparent; color: var(--grafito); border-color: var(--marmol);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--papiro); border-color: var(--bronce); color: var(--bronce);
}
.btn-google {
  background: var(--blanco); color: var(--grafito); border-color: var(--marmol);
  gap: 0.6rem;
}
.btn-google:hover:not(:disabled) {
  border-color: var(--dorado); box-shadow: 0 2px 8px var(--sombra);
}
.btn-block { width: 100%; }

/* ===== FORMULARIOS ===== */
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field > span { font-size: 0.85rem; font-weight: 500; color: var(--grafito-claro); }
.field input {
  padding: 0.8rem 1rem; border: 2px solid var(--marmol); border-radius: var(--radio);
  font-family: inherit; font-size: 1rem; color: var(--negro);
  background: var(--blanco); transition: border-color var(--trans), box-shadow var(--trans);
}
.field input:focus { outline: none; border-color: var(--dorado); box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.18); }
.field input::placeholder { color: var(--marmol); }

.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.tab {
  flex: 1; padding: 0.6rem 0; border: 2px solid var(--marmol); border-radius: var(--radio);
  background: transparent; color: var(--marmol); font-weight: 600; font-family: inherit;
  cursor: pointer; transition: all var(--trans);
}
.tab.active { background: var(--dorado); border-color: var(--dorado); color: var(--negro); }

.auth-divider { display: flex; align-items: center; gap: 1rem; margin: 1rem 0; color: var(--marmol); font-size: 0.85rem; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--marmol); }

.msg { margin-top: 0.75rem; font-size: 0.875rem; min-height: 1.25rem; text-align: center; }
.msg.err { color: #B91C1C; }
.msg.ok { color: #166534; }

/* ===== VISTA AUTH (centrada) ===== */
.auth-view { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 2rem 1rem; }
.auth-card {
  width: 100%; max-width: 420px; background: var(--blanco); border-radius: 18px;
  padding: 2.5rem 2rem; box-shadow: 0 10px 40px var(--sombra);
  border: 1px solid rgba(201, 162, 39, 0.12);
}
.auth-card .brand { text-align: center; margin-bottom: 1.5rem; }
.auth-card .brand-title { margin-bottom: 0.25rem; }
.auth-card form { display: flex; flex-direction: column; gap: 1rem; }
.auth-card .field { margin: 0; }

/* ===== VISTA CATÁLOGO ===== */
.catalogo-view { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem 1.5rem; background: var(--blanco);
  border-bottom: 1px solid var(--papiro); box-shadow: 0 2px 10px var(--sombra);
}
.topbar .brand { display: flex; align-items: center; gap: 0.75rem; }
.userbox { display: flex; align-items: center; gap: 1rem; font-size: 0.875rem; color: var(--grafito-claro); }
.user-email { font-weight: 500; color: var(--grafito); }

.hero { text-align: center; padding: 3rem 1.5rem 2rem; }
.hero h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); margin-bottom: 0.5rem; }
.hero p { color: var(--marmol); max-width: 480px; margin: 0 auto; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; padding: 0 1.5rem 2rem; }
.card {
  background: var(--blanco); border-radius: var(--radio); padding: 1.5rem;
  border: 1px solid var(--papiro); box-shadow: 0 4px 16px var(--sombra);
  cursor: pointer; transition: all var(--trans);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px var(--sombra-fuerte); border-color: var(--dorado); }
.card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card p { color: var(--grafito-claro); font-size: 0.9rem; margin-bottom: 0.5rem; }
.card .meta { font-size: 0.8rem; color: var(--marmol); font-weight: 500; }

/* ===== VISTA CHAT (FULL SCREEN) ===== */
.chat-view {
  min-height: 100vh; height: 100vh; display: flex; flex-direction: column;
  background: var(--papiro);
}

/* Header fijo */
.chat-header {
  position: sticky; top: 0; z-index: 40; flex-shrink: 0;
  display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1rem;
  background: var(--blanco); border-bottom: 1px solid var(--papiro);
  box-shadow: 0 2px 10px var(--sombra);
}
.chat-header .brand { display: flex; align-items: center; gap: 0.75rem; flex: 1; min-width: 0; }
.chat-title-wrap { min-width: 0; }
.chat-title-wrap .brand-title.small { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-title-wrap .brand-sub.small { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.progreso-wrap { display: flex; align-items: center; gap: 0.75rem; margin-left: auto; white-space: nowrap; }
.progreso-label { font-size: 0.75rem; font-weight: 600; color: var(--marmol); text-transform: uppercase; letter-spacing: 0.05em; }
.progreso-bar { flex: 1; max-width: 200px; height: 8px; background: var(--papiro); border-radius: 999px; overflow: hidden; }
.progreso-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--dorado), var(--dorado-claro)); border-radius: 999px; transition: width 0.4s ease; }

/* Área de chat: flex-grow, scroll interno */
.chat-caja {
  flex: 1 1 auto; overflow-y: auto; padding: 1.5rem 1rem; display: flex; flex-direction: column; gap: 1rem;
  max-width: 720px; margin: 0 auto; width: 100%;
}

.burbuja {
  display: flex; flex-direction: column; gap: 0.25rem; max-width: 85%; animation: burbuja-in 0.25s ease;
}
@keyframes burbuja-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.burbuja.agente { align-self: flex-start; }
.burbuja.usuario { align-self: flex-end; }

.burbuja .meta {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  padding: 0 0.5rem; opacity: 0.7;
}
.burbuja.agente .meta { color: var(--bronce); }
.burbuja.usuario .meta { color: var(--dorado); text-align: right; }

.burbuja > *:not(.meta) {
  padding: 0.85rem 1.1rem; border-radius: var(--radio); font-size: 0.95rem; line-height: 1.6;
  box-shadow: 0 2px 8px var(--sombra);
}
.burbuja.agente > *:not(.meta) {
  background: var(--blanco); color: var(--grafito); border: 1px solid var(--papiro);
  border-bottom-left-radius: 4px;
}
.burbuja.usuario > *:not(.meta) {
  background: linear-gradient(135deg, var(--dorado), var(--dorado-claro)); color: var(--negro);
  border-bottom-right-radius: 4px;
}

.burbuja strong { font-weight: 700; color: inherit; }

.typing {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; color: var(--marmol); font-size: 0.9rem; font-style: italic;
}
.typing::after { content: ''; width: 16px; height: 16px; border: 2px solid var(--dorado); border-right-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Input bar fija al fondo */
.chat-inputbar {
  position: sticky; bottom: 0; z-index: 30; flex-shrink: 0;
  display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1rem;
  background: linear-gradient(180deg, rgba(237,231,217,0) 0%, var(--papiro) 30%, var(--blanco) 100%);
  border-top: 1px solid var(--papiro);
}
.chat-inputbar input {
  flex: 1; padding: 0.85rem 1rem; border: 2px solid var(--marmol); border-radius: var(--radio);
  font-family: inherit; font-size: 1rem; color: var(--negro); background: var(--blanco);
  transition: border-color var(--trans), box-shadow var(--trans);
}
.chat-inputbar input:focus { outline: none; border-color: var(--dorado); box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.18); }
.chat-inputbar input::placeholder { color: var(--marmol); }
.chat-inputbar .btn-primary { padding: 0.85rem 1.5rem; font-size: 0.95rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .auth-card { padding: 1.75rem 1.25rem; }
  .chat-header { padding: 0.5rem 0.75rem; gap: 0.5rem; }
  .progreso-wrap { display: none; }
  .chat-caja { padding: 1rem 0.75rem; gap: 0.75rem; }
  .burbuja { max-width: 95%; }
  .chat-inputbar { padding: 0.5rem 0.75rem; }
  .chat-inputbar .btn-primary { padding: 0.75rem 1rem; }
}