:root {
  --bg: #f5fcfc;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --text: #102026;
  --muted: #4e6b73;
  --accent: #0f8f8a;
  --accent-strong: #0a6f6c;
  --accent-soft: #e6f8f7;
  --line: #d6eceb;
  --success: #0d8a6a;
  --danger: #bc3046;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% 10%, #ddf7f5 0%, transparent 35%),
    radial-gradient(circle at 78% 8%, #ecfbfa 0%, transparent 40%),
    linear-gradient(145deg, #ffffff 0%, #f6fdfd 50%, #edf8f8 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

.background-glow {
  position: fixed;
  width: 30rem;
  height: 30rem;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.22;
  pointer-events: none;
  z-index: -1;
}

.glow-a {
  top: -8rem;
  left: -7rem;
  background: #8ee3df;
}

.glow-b {
  right: -9rem;
  bottom: -9rem;
  background: #65cfc9;
}

.shell {
  width: min(1280px, calc(100vw - 2.5rem));
  margin: 1.2rem auto 2rem;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.09em;
  font-size: 0.72rem;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
}

h1 {
  font-size: clamp(1.8rem, 2.3vw, 2.7rem);
  margin-top: 0.2rem;
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1.1rem;
}

.health-badge {
  align-self: center;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  font-weight: 600;
  background: #e8faf9;
  color: #0a6662;
  border: 1px solid #bde8e5;
}

.health-badge.ok {
  background: #e5f8f4;
  color: #0d6d54;
  border-color: #b9e6da;
}

.health-badge.warn {
  background: #fff4df;
  color: #7a4d1f;
  border-color: #f0dab8;
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr 300px;
  gap: 1rem;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 25px rgba(10, 111, 108, 0.1);
  padding: 1rem;
}

.controls,
.history-panel {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 3rem);
  overflow: auto;
}

.field-label {
  display: block;
  margin-top: 0.8rem;
  margin-bottom: 0.35rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
}

input,
textarea,
button {
  font-family: "Space Grotesk", sans-serif;
}

input,
textarea {
  width: 100%;
  border: 1px solid #bfdedd;
  border-radius: 12px;
  padding: 0.72rem 0.78rem;
  font-size: 0.95rem;
  background: #ffffff;
  color: var(--text);
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(15, 143, 138, 0.28);
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 70px;
}

.stacked-form {
  margin-top: 0.3rem;
}

.btn-primary,
.btn-ghost {
  cursor: pointer;
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 0.64rem 0.92rem;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 120ms ease, box-shadow 160ms ease, opacity 120ms ease;
}

.btn-primary {
  margin-top: 0.6rem;
  background: linear-gradient(130deg, var(--accent) 0%, #14a39d 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(10, 111, 108, 0.28);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--accent-soft);
  border-color: #b7e8e5;
  color: #0a6864;
}

.btn-ghost:hover {
  transform: translateY(-1px);
}

.inline-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
}

.panel-divider {
  border-top: 1px solid var(--line);
  margin: 0.95rem 0;
}

.hint,
.status-line {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 0.5rem;
}

.status-line.ok {
  color: var(--success);
}

.status-line.error {
  color: var(--danger);
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.55rem;
  font-size: 0.88rem;
}

.toggle-row input {
  width: auto;
  margin: 0;
}

.documents-list {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.65rem;
}

.doc-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  align-items: start;
  border: 1px solid #cfe9e8;
  background: #f9ffff;
  border-radius: 12px;
  padding: 0.56rem;
}

.doc-item input {
  width: auto;
  margin-top: 0.2rem;
}

.doc-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.doc-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

.cache-tools {
  margin-top: 0.9rem;
}

.chat-panel {
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 78vh;
}

.messages {
  display: grid;
  gap: 0.8rem;
  padding-right: 0.25rem;
  overflow: auto;
}

.message {
  max-width: 92%;
  border-radius: 14px;
  padding: 0.78rem 0.85rem;
  line-height: 1.45;
  border: 1px solid #cfe6e5;
  animation: slide-in 220ms ease;
}

.message.user {
  justify-self: end;
  background: #e8fbfa;
  border-color: #bde8e6;
}

.message.assistant {
  justify-self: start;
  background: #ffffff;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.badge {
  display: inline-block;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge.cache {
  background: #e9f8f8;
  color: #0b6260;
}

.badge.fresh {
  background: #dff6f2;
  color: #0f6b58;
}

.message small {
  color: var(--muted);
  font-size: 0.74rem;
}

.references {
  margin-top: 0.55rem;
  border-top: 1px dashed #c8e6e4;
  padding-top: 0.5rem;
  display: grid;
  gap: 0.4rem;
}

.reference {
  border: 1px solid #d2eceb;
  border-radius: 10px;
  padding: 0.48rem;
  background: #f9ffff;
}

.reference-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: #0b6562;
}

.reference p {
  margin: 0.25rem 0 0;
  color: #1d3941;
  font-size: 0.82rem;
}

.chat-form {
  margin-top: 0.85rem;
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: end;
}

.conversation-list {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.5rem;
}

.history-item {
  border: 1px solid #d1ebe9;
  border-radius: 12px;
  padding: 0.56rem;
  background: #f9ffff;
}

.history-item .topic {
  font-size: 0.78rem;
  font-weight: 700;
  color: #0a6d69;
}

.history-item .question {
  margin-top: 0.2rem;
  font-size: 0.84rem;
  color: #1f3c43;
}

.history-item .meta {
  margin-top: 0.28rem;
  font-size: 0.72rem;
  color: var(--muted);
}

.toast-host {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.5rem;
  z-index: 20;
}

.toast {
  min-width: 210px;
  max-width: 340px;
  border-radius: 10px;
  border: 1px solid #cfe8e7;
  padding: 0.65rem 0.75rem;
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(10, 111, 108, 0.14);
  animation: fade-up 250ms ease;
}

.toast.ok {
  border-color: #bae6dc;
}

.toast.error {
  border-color: #efc5cb;
}

.fade-in,
.fade-in-delay-1,
.fade-in-delay-2,
.fade-in-delay-3 {
  opacity: 0;
  animation: fade-up 450ms ease forwards;
}

.fade-in-delay-1 {
  animation-delay: 90ms;
}

.fade-in-delay-2 {
  animation-delay: 170ms;
}

.fade-in-delay-3 {
  animation-delay: 250ms;
}

@keyframes fade-up {
  from {
    transform: translateY(10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slide-in {
  from {
    transform: translateY(5px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .controls,
  .history-panel {
    position: static;
    max-height: none;
  }

  .chat-panel {
    min-height: 58vh;
  }
}

@media (max-width: 640px) {
  .shell {
    width: calc(100vw - 1rem);
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }
}