:root {
  color-scheme: dark;
  --bg: #07090d;
  --bg-soft: #0b0f16;
  --panel: rgba(18, 23, 32, 0.82);
  --panel-strong: rgba(25, 32, 44, 0.94);
  --panel-soft: rgba(255, 255, 255, 0.035);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(215, 178, 94, 0.36);
  --text: #f4f0e8;
  --muted: #9aa4b2;
  --muted-soft: #697385;
  --accent: #d7b25e;
  --accent-strong: #f1cf7a;
  --accent-blue: #4b8dff;
  --danger: #ff6b6b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(215, 178, 94, 0.13), transparent 32rem),
    radial-gradient(circle at top right, rgba(75, 141, 255, 0.13), transparent 30rem),
    linear-gradient(135deg, #06070a 0%, #0c1119 48%, #07090d 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

button,
input,
textarea {
  font: inherit;
}

button,
input,
textarea,
.history-item,
.msg,
.topbar,
.chat-panel,
.history-panel,
.profile-card {
  transition:
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
}

.topbar,
.chat-panel,
.history-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.topbar {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 74px;
  padding: 12px 18px;
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02)),
    rgba(10, 13, 19, 0.76);
  border-color: rgba(215, 178, 94, 0.22);
}

.brand {
  min-width: 0;
  display: flex;
  justify-content: center;
}

.brand img {
  display: block;
  width: min(360px, 76vw);
  height: auto;
  max-height: 66px;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 12px 22px rgba(0, 0, 0, 0.38));
}

h2,
p {
  margin-top: 0;
}

h2 {
  margin-bottom: 4px;
  font-size: 15px;
  line-height: 1.2;
  letter-spacing: 0.01em;
  font-weight: 700;
}

p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12.5px;
}

.workspace {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 14px;
  margin-top: 14px;
}

.history-panel,
.chat-panel {
  border-radius: 24px;
}

.history-panel {
  min-height: calc(100vh - 124px);
  padding: 14px;
  overflow: hidden;
}

.chat-panel {
  min-height: calc(100vh - 124px);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.profile-card {
  display: grid;
  gap: 9px;
  padding: 13px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(215, 178, 94, 0.08), rgba(75, 141, 255, 0.04)),
    rgba(255, 255, 255, 0.035);
}

.profile-card h2 {
  color: var(--accent-strong);
}

.login-actions {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  gap: 8px;
}

.history-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin: 8px 0 10px;
}

.history-heading h2 {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.11em;
}

.history-list {
  display: grid;
  gap: 7px;
}

.history-note {
  padding: 10px;
  border: 1px dashed rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  color: var(--muted-soft);
  background: rgba(255, 255, 255, 0.025);
}

.history-item {
  min-height: 38px;
  width: 100%;
  border: 1px solid transparent;
  border-radius: 14px;
  background: transparent;
  color: var(--muted);
  padding: 9px 10px;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.history-item:hover,
.history-item.active {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.055);
  color: var(--text);
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 14px;
  padding: 2px 2px 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.panel-heading h2 {
  font-size: 18px;
  letter-spacing: -0.02em;
}

.panel-heading p {
  max-width: 720px;
}

.hidden {
  display: none !important;
}

input,
textarea,
button {
  min-height: 38px;
  border-radius: 14px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(5, 8, 13, 0.72);
  color: var(--text);
  padding: 10px 11px;
  outline: none;
}

input::placeholder,
textarea::placeholder {
  color: #667184;
}

input:focus,
textarea:focus {
  border-color: rgba(215, 178, 94, 0.58);
  box-shadow: 0 0 0 4px rgba(215, 178, 94, 0.08);
}

textarea {
  resize: none;
}

button {
  border: 1px solid rgba(215, 178, 94, 0.28);
  background:
    linear-gradient(135deg, rgba(241, 207, 122, 0.95), rgba(176, 128, 43, 0.95));
  color: #101010;
  padding: 0 14px;
  font-weight: 750;
  letter-spacing: -0.01em;
  cursor: pointer;
}

button:hover {
  background:
    linear-gradient(135deg, rgba(255, 224, 146, 1), rgba(202, 151, 55, 1));
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(215, 178, 94, 0.14);
}

button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
}

button.secondary:hover {
  background: rgba(255, 255, 255, 0.075);
  box-shadow: none;
}

button:disabled {
  cursor: wait;
  opacity: 0.68;
  transform: none;
}

.chat-log {
  flex: 1;
  min-height: 420px;
  overflow: auto;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at top left, rgba(75, 141, 255, 0.07), transparent 24rem),
    rgba(3, 6, 10, 0.58);
  border-radius: 20px;
  padding: 16px;
  margin-bottom: 12px;
  scrollbar-width: thin;
  scrollbar-color: rgba(215, 178, 94, 0.36) transparent;
}

.chat-log::-webkit-scrollbar {
  width: 9px;
}

.chat-log::-webkit-scrollbar-track {
  background: transparent;
}

.chat-log::-webkit-scrollbar-thumb {
  background: rgba(215, 178, 94, 0.28);
  border-radius: 999px;
}

.msg {
  max-width: min(760px, 86%);
  margin: 9px 0;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 18px;
  white-space: pre-wrap;
  line-height: 1.55;
  font-size: 13.5px;
}

.msg.user {
  margin-left: auto;
  border-color: rgba(75, 141, 255, 0.28);
  background:
    linear-gradient(135deg, rgba(75, 141, 255, 0.22), rgba(75, 141, 255, 0.08)),
    rgba(255, 255, 255, 0.04);
}

.msg.assistant {
  background: rgba(255, 255, 255, 0.055);
}

.prompt-row {
  display: grid;
  grid-template-columns: 1fr 92px;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.035);
}

.prompt-row textarea {
  height: 52px;
  min-height: 52px;
  max-height: 140px;
  border: 0;
  background: transparent;
  padding: 8px 4px;
  box-shadow: none;
}

.prompt-row textarea:focus {
  border: 0;
  box-shadow: none;
}

.prompt-row button {
  align-self: end;
  min-height: 42px;
}

.access-panel,
.access-row {
  display: none;
}

@media (max-width: 860px) {
  .shell {
    width: min(100% - 20px, 900px);
    padding: 10px 0;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .topbar {
    min-height: 62px;
    border-radius: 18px;
  }

  .brand img {
    width: min(280px, 82vw);
    max-height: 54px;
  }

  .history-panel,
  .chat-panel {
    min-height: auto;
    border-radius: 20px;
  }

  .history-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(150px, 1fr);
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .profile-card {
    grid-template-columns: 1fr;
  }

  .login-actions {
    grid-template-columns: 1fr 1fr;
  }

  .chat-log {
    min-height: 48vh;
  }

  .msg {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 13.5px;
  }

  .prompt-row {
    grid-template-columns: 1fr;
  }

  .prompt-row button {
    width: 100%;
  }
}