:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1f2a44;
  --ink-soft: #5b6478;
  --line: #e2e5ea;
  --accent: #1f2a44;
  --accent-2: #c9a14a;     /* dorado sobrio, tono jurídico */
  --ok: #1b7f4b;
  --warn: #b4452a;
  --radius: 12px;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); }

#app { display: flex; height: 100vh; }

/* Sidebar */
#sidebar {
  width: 300px; min-width: 260px; background: var(--accent); color: #eef1f6;
  display: flex; flex-direction: column; padding: 18px 14px; gap: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700;
  letter-spacing: .3px; padding: 4px 6px 10px; }
.brand-mark { color: var(--accent-2); font-size: 24px; }
.exp-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.exp-item { padding: 10px 12px; border-radius: 10px; cursor: pointer; font-size: 14px;
  color: #dbe0ea; background: transparent; border: 1px solid transparent; }
.exp-item:hover { background: rgba(255,255,255,.06); }
.exp-item.active { background: rgba(201,161,74,.18); border-color: rgba(201,161,74,.5); color: #fff; }
.exp-item .num { display: block; font-size: 12px; color: #9aa3b5; margin-top: 2px; }
.sidebar-foot { font-size: 11px; color: #8b94a8; padding: 8px 6px 0; border-top: 1px solid rgba(255,255,255,.08); }

/* Main */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.vacio { flex: 1; display: grid; place-items: center; }
.vacio-inner { text-align: center; color: var(--ink-soft); }
.vacio-bust { width: 150px; height: 150px; object-fit: cover; border-radius: 50%;
  margin: 0 auto 18px; box-shadow: 0 10px 30px rgba(31,42,68,.25); }
.vacio-inner h1 { font-size: 40px; color: var(--ink); margin: 0 0 8px; }

.caso { flex: 1; display: flex; flex-direction: column; min-height: 0; padding: 22px 28px; gap: 14px; }
.caso-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.caso-head h2 { margin: 0; font-size: 22px; }
.muted { color: var(--ink-soft); font-size: 13px; margin: 4px 0 0; }

.brief { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; white-space: pre-wrap; font-size: 14px; line-height: 1.5; max-height: 30vh;
  overflow-y: auto; }
.brief:empty { display: none; }
.brief h4 { margin: 0 0 8px; color: var(--accent-2); font-size: 13px; text-transform: uppercase;
  letter-spacing: .5px; }

.chat { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; padding: 4px; }
.msg { max-width: 80%; padding: 12px 14px; border-radius: var(--radius); font-size: 14px;
  line-height: 1.55; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--panel); border: 1px solid var(--line);
  border-bottom-left-radius: 4px; }
.cites { margin-top: 10px; border-top: 1px dashed var(--line); padding-top: 8px; font-size: 12px; }
.cites a { color: var(--accent); }
.cite-row { margin: 3px 0; }
.cite-n { display: inline-block; min-width: 20px; font-weight: 700; color: var(--accent-2); }
.firewall { margin-top: 8px; font-size: 12px; font-weight: 600; }
.firewall.ok { color: var(--ok); }
.firewall.warn { color: var(--warn); }
.issue { color: var(--warn); font-size: 12px; margin-top: 4px; }

.chat-form { display: flex; gap: 10px; align-items: flex-end; }
.chat-form textarea { flex: 1; resize: none; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: var(--radius); font: inherit; font-size: 14px; }

/* Botones */
.btn-primary { background: var(--accent-2); color: #1c1c1c; border: none; padding: 11px 16px;
  border-radius: 10px; font-weight: 700; cursor: pointer; font-size: 14px; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; border: 1px solid var(--line); padding: 11px 16px;
  border-radius: 10px; cursor: pointer; }
.upload { background: #fff; border: 1px solid var(--line); padding: 9px 14px; border-radius: 10px;
  cursor: pointer; font-size: 13px; white-space: nowrap; }

/* Modal */
dialog { border: none; border-radius: 16px; padding: 0; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(20,26,40,.45); }
#form-nuevo { padding: 24px; display: flex; flex-direction: column; gap: 12px; min-width: 360px; }
#form-nuevo h3 { margin: 0 0 4px; }
#form-nuevo label { display: flex; flex-direction: column; font-size: 13px; gap: 4px; color: var(--ink-soft); }
#form-nuevo input { padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.dlg-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* Términos y Condiciones */
#dlg-terminos { max-width: 640px; }
.tos { padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.tos h3 { margin: 0; }
.tos-text { max-height: 50vh; overflow-y: auto; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; font-size: 13px; line-height: 1.55; white-space: pre-wrap; background: #fafbfc; }
.tos-check { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.hidden { display: none !important; }