:root {
  --bg0: #1a2f28;
  --bg1: #243d34;
  --bg2: #2f4f42;
  --ink: #f3efe6;
  --ink-soft: #c8c0b0;
  --accent: #e8a54b;
  --accent-deep: #c47d22;
  --panel: rgba(15, 28, 24, 0.72);
  --line: rgba(243, 239, 230, 0.12);
  --ok: #7dbe8a;
  --err: #e07a6a;
  --radius: 18px;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 10% -10%, #3d6b55 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 20%, #8b5a2b55 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 45%, #15241f 100%);
  background-attachment: fixed;
}

a {
  color: var(--accent);
}

.brand {
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* —— Chat —— */
.page-chat {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.chat-shell {
  width: min(720px, 100%);
  min-height: min(88vh, 820px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1rem;
  animation: rise 0.7s ease both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.chat-hero h1 {
  font-family: var(--display);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 600;
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
}

.chat-hero .lede {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  max-width: 36ch;
  line-height: 1.45;
}

.banner-warn {
  margin: 0.85rem 0 0;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--line);
  background: rgba(232, 165, 75, 0.12);
  border-radius: 12px;
  font-size: 0.92rem;
}

.chat-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.msg {
  max-width: 88%;
  padding: 0.75rem 0.95rem;
  border-radius: 14px;
  line-height: 1.45;
  animation: pop 0.35s ease both;
}

@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.msg p {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg .fuentes {
  margin-top: 0.55rem;
  font-size: 0.78rem;
  color: var(--ink-soft);
  opacity: 0.9;
}

.msg.bot {
  align-self: flex-start;
  background: rgba(243, 239, 230, 0.08);
  border: 1px solid var(--line);
}

.msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #1a150c;
  font-weight: 500;
}

.msg.typing {
  opacity: 0.75;
  font-style: italic;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.65rem;
}

.chat-form input,
.login-card input,
.upload-form input[type="file"] {
  font: inherit;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  outline: none;
}

.chat-form input:focus,
.login-card input:focus {
  border-color: var(--accent);
}

.chat-form button,
.login-card button,
.upload-form button,
.btn-danger {
  font: inherit;
  font-weight: 600;
  border: 0;
  border-radius: 14px;
  padding: 0.85rem 1.2rem;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #1a150c;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.chat-form button:hover,
.login-card button:hover,
.upload-form button:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.chat-form button:disabled {
  opacity: 0.55;
  cursor: wait;
  transform: none;
}

/* —— Admin —— */
.page-admin-login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.login-card {
  width: min(400px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  backdrop-filter: blur(10px);
  animation: rise 0.6s ease both;
}

.login-card h1 {
  font-family: var(--display);
  font-size: 1.35rem;
  margin: 0.4rem 0 0;
}

.login-card .sub,
.admin-section .sub,
.hint {
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.45;
}

.login-card form {
  display: grid;
  gap: 0.55rem;
  margin-top: 1.25rem;
}

.login-card label {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.login-card .back {
  margin: 1.1rem 0 0;
  font-size: 0.9rem;
}

.alert {
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
  margin: 0.9rem 0 0;
  background: rgba(224, 122, 106, 0.18);
  border: 1px solid rgba(224, 122, 106, 0.35);
}

.alert-ok {
  background: rgba(125, 190, 138, 0.15);
  border-color: rgba(125, 190, 138, 0.35);
  color: var(--ok);
}

.alert-err {
  color: #ffb4a8;
}

.page-admin {
  min-height: 100vh;
  padding: 1.5rem clamp(1rem, 4vw, 2.5rem) 3rem;
}

.admin-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.admin-top h1 {
  font-family: var(--display);
  margin: 0.25rem 0 0;
  font-size: 1.5rem;
}

.admin-top nav {
  display: flex;
  gap: 1rem;
}

.admin-top a {
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}

.admin-top a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.admin-main {
  width: min(760px, 100%);
  display: grid;
  gap: 1.25rem;
}

.admin-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  backdrop-filter: blur(8px);
}

.admin-section h2 {
  font-family: var(--display);
  font-size: 1.2rem;
  margin: 0 0 0.35rem;
}

.upload-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
}

.hint {
  margin: 1rem 0 0;
}

.hint code {
  font-size: 0.85em;
  background: rgba(0, 0, 0, 0.25);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}

.doc-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.doc-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.doc-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.doc-list strong {
  display: block;
}

.doc-list span {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 0.2rem;
}

.ai-form label {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.ai-form input,
.ai-form select {
  font: inherit;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  outline: none;
  width: 100%;
}

.ai-form input:focus,
.ai-form select:focus {
  border-color: var(--accent);
}

.doc-preview {
  margin-top: 0.45rem !important;
  padding: 0.55rem 0.7rem;
  background: rgba(0, 0, 0, 0.22);
  border-radius: 10px;
  font-size: 0.8rem !important;
  line-height: 1.4;
  max-width: 52ch;
  white-space: pre-wrap;
}


.btn-danger {
  background: transparent;
  color: var(--err);
  border: 1px solid rgba(224, 122, 106, 0.45);
  padding: 0.55rem 0.9rem;
}

.btn-danger:hover {
  background: rgba(224, 122, 106, 0.12);
}

.empty {
  color: var(--ink-soft);
}

@media (max-width: 560px) {
  .chat-shell {
    min-height: 92vh;
  }

  .msg {
    max-width: 95%;
  }

  .upload-form {
    flex-direction: column;
    align-items: stretch;
  }
}