:root {
  color-scheme: dark;
  --bg: #080a10;
  --panel: #111521;
  --panel-soft: #171d2b;
  --panel-strong: #20283a;
  --panel-warm: #211b24;
  --line: #31394b;
  --line-soft: rgba(255, 255, 255, 0.07);
  --text: #f5f7fb;
  --muted: #a1adbf;
  --soft: #d6ddea;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --mint: #8ee6c8;
  --rose: #fb7185;
  --gold: #f8c663;
  --violet: #a78bfa;
  --danger: #fb7185;
  --warning: #f8c663;
  --success: #8ee6c8;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.48);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(125, 211, 252, 0.17), transparent 28rem),
    radial-gradient(circle at 88% 16%, rgba(248, 198, 99, 0.12), transparent 24rem),
    radial-gradient(circle at 64% 92%, rgba(251, 113, 133, 0.10), transparent 26rem),
    linear-gradient(135deg, #080a10 0%, #10131d 46%, #151925 100%);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.8rem 1.05rem;
  color: #071018;
  background: linear-gradient(135deg, var(--accent), var(--mint));
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
  box-shadow: 0 12px 26px rgba(125, 211, 252, 0.18);
}

button:hover {
  background: linear-gradient(135deg, #a5e4ff, #b0f3dc);
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

button.secondary {
  padding: 0.5rem 0.7rem;
  color: var(--soft);
  background: #263047;
  font-size: 0.82rem;
  box-shadow: none;
}

.shell {
  min-height: 100vh;
  padding: clamp(0.75rem, 2.5vw, 1.5rem);
}

.app-frame {
  display: grid;
  grid-template-columns: minmax(17rem, 21rem) minmax(0, 1fr);
  width: min(100%, 76rem);
  min-height: min(48rem, calc(100vh - 3rem));
  margin: 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 20px;
  overflow: hidden;
  background: rgba(13, 16, 25, 0.84);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.sidebar {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  gap: 1rem;
  padding: 1.25rem;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(32, 40, 58, 0.72), rgba(14, 18, 28, 0.88)),
    rgba(10, 15, 25, 0.72);
}

.brand,
.topbar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 3.15rem;
  height: 3.15rem;
  border-radius: 10px;
  color: #081018;
  background: linear-gradient(145deg, var(--gold), var(--rose));
  font-weight: 900;
  box-shadow: 0 14px 34px rgba(251, 113, 133, 0.22);
}

h1,
h2,
p,
dl {
  margin: 0;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1;
}

h2 {
  font-size: 1rem;
}

.brand p,
.eyebrow,
label,
dt,
.hint,
footer {
  color: var(--muted);
}

.panel {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.018)),
    rgba(17, 21, 33, 0.78);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

label,
dt {
  font-size: 0.82rem;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid #394256;
  border-radius: 12px;
  padding: 0.85rem 0.9rem;
  color: var(--text);
  background: rgba(8, 10, 16, 0.74);
}

textarea {
  min-height: 3.6rem;
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: 3px solid rgba(125, 211, 252, 0.18);
  border-color: var(--accent);
}

.usage-list {
  display: grid;
  gap: 0.62rem;
}

.usage-list div {
  display: grid;
  grid-template-columns: 7.4rem minmax(0, 1fr);
  gap: 0.65rem;
  align-items: baseline;
}

dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--soft);
}

.hint {
  font-size: 0.78rem;
  line-height: 1.45;
}

footer {
  align-self: end;
  font-size: 0.82rem;
}

.chat-card {
  display: grid;
  grid-template-rows: auto auto minmax(18rem, 1fr) auto;
  min-width: 0;
  background: rgba(17, 24, 39, 0.84);
}

.topbar {
  justify-content: space-between;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(32, 40, 58, 0.92), rgba(33, 27, 36, 0.82)),
    rgba(21, 31, 49, 0.82);
}

.topbar h2 {
  margin-top: 0.2rem;
  font-size: 1.45rem;
}

.eyebrow {
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.status-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.status-grid span {
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 0.42rem 0.62rem;
  color: var(--soft);
  background: rgba(8, 10, 16, 0.58);
  font-size: 0.78rem;
  font-weight: 800;
}

.status-grid span:first-child {
  color: #081018;
  background: var(--gold);
}

.status {
  min-height: 2.75rem;
  padding: 0.78rem 1.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: rgba(8, 10, 16, 0.38);
}

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

.status.loading {
  color: var(--accent);
}

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

.chat-history {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
  padding: 1.35rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 9rem),
    rgba(9, 12, 19, 0.28);
}

.message {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 42rem);
  gap: 0.7rem;
  align-items: start;
}

.message.user {
  grid-template-columns: minmax(0, 42rem) 2.2rem;
  justify-content: end;
}

.message.user .avatar {
  grid-column: 2;
  grid-row: 1;
  background: #30384b;
  color: var(--text);
}

.message.user .bubble {
  grid-column: 1;
  color: #071018;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #b5e7ff);
}

.avatar {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 9px;
  color: #071018;
  background: linear-gradient(145deg, var(--mint), var(--accent));
  font-size: 0.78rem;
  font-weight: 900;
}

.bubble {
  min-width: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  line-height: 1.6;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.052), rgba(255, 255, 255, 0.018)),
    var(--panel-strong);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.18);
}

.message.loading .bubble {
  color: var(--muted);
}

.typing {
  display: inline-flex;
  gap: 0.24rem;
  align-items: center;
}

.typing span {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: var(--gold);
  animation: pulse 1s infinite ease-in-out;
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes pulse {
  0%, 80%, 100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-0.2rem);
  }
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body pre {
  margin: 0 0 0.75rem;
}

.markdown-body > :last-child {
  margin-bottom: 0;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.25rem;
}

.markdown-body code {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 0.12rem 0.32rem;
  color: #ffe3a3;
  background: rgba(0, 0, 0, 0.32);
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.92em;
}

.markdown-body pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem;
  background: #090d14;
}

.markdown-body pre code {
  border: 0;
  padding: 0;
  background: transparent;
}

.composer {
  display: grid;
  gap: 0.65rem;
  padding: 1.15rem 1.25rem;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(32, 40, 58, 0.42), rgba(8, 10, 16, 0.72)),
    rgba(8, 10, 16, 0.58);
}

.send-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: stretch;
}

@media (max-width: 860px) {
  .shell {
    padding: 0;
  }

  .app-frame {
    grid-template-columns: 1fr;
    min-height: 100vh;
    border: 0;
    border-radius: 0;
  }

  .sidebar {
    grid-template-rows: auto auto auto auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .usage-list {
    grid-template-columns: 1fr 1fr;
  }

  .usage-list div {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .status-grid {
    justify-content: flex-start;
  }

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

  button {
    width: 100%;
  }

  .message,
  .message.user {
    grid-template-columns: 2rem minmax(0, 1fr);
    justify-content: stretch;
  }

  .message.user .avatar {
    grid-column: 1;
  }

  .message.user .bubble {
    grid-column: 2;
  }

  .usage-list {
    grid-template-columns: 1fr;
  }
}