:root {
  --bg: #090b10;
  --surface: #11141b;
  --surface-raised: #171b24;
  --border: #292e3a;
  --border-strong: #3a4252;
  --text: #f4f6fa;
  --muted: #929aa9;
  --subtle: #687181;
  --accent: #8b7cff;
  --accent-strong: #a99fff;
  --accent-soft: rgba(139, 124, 255, 0.13);
  --cyan: #64d7e8;
  --success: #55d69e;
  --danger: #ff7d88;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -20%, rgba(93, 80, 196, 0.13), transparent 34rem),
    var(--bg);
  color: var(--text);
  line-height: 1.45;
}
button, input, textarea, select { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

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

.auth-view {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(1.25rem, env(safe-area-inset-top)) 1.25rem max(1.25rem, env(safe-area-inset-bottom));
}

.login-panel {
  width: min(100%, 25rem);
  text-align: center;
}

.brand-mark {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  margin: 0 auto 1.25rem;
  border: 1px solid #5f55a7;
  border-radius: 0.8rem;
  background: linear-gradient(145deg, #27223f, #12141b);
  color: var(--accent-strong);
  font: 700 1.15rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  box-shadow: 0 0 28px rgba(139, 124, 255, 0.13);
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent-strong);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1, h2, p { overflow-wrap: anywhere; }
h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.55rem, 5vw, 2rem);
  letter-spacing: -0.035em;
}
h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  letter-spacing: -0.025em;
}

#account-input,
.amount-field,
.invoice-text,
.account-number-display {
  width: 100%;
  border: 1px solid var(--border-strong);
  background: #0c0f14;
  color: var(--text);
  border-radius: 0.75rem;
}

#account-input {
  padding: 0.95rem 1rem;
  text-align: center;
  font: 600 1.05rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.09em;
}

input:focus, textarea:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.login-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-top: 0.75rem;
}

button {
  border: 0;
  border-radius: 0.65rem;
  padding: 0.72rem 1rem;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
  background: var(--accent);
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.button-primary { background: var(--accent); }
.button-secondary { background: #252a35; border: 1px solid #373e4c; }
.text-button { background: transparent; color: var(--muted); padding-inline: 0.55rem; }
.full-width { width: 100%; margin-top: 0.85rem; }

.bearer-note,
.field-hint,
.modal-copy,
.status-line,
.chat-meter {
  color: var(--muted);
  font-size: 0.8rem;
}
.bearer-note { margin: 1.15rem auto 0; max-width: 22rem; }
.status-line { min-height: 1.2rem; margin: 0.7rem 0 0; }
.status-line.error { color: var(--danger); }
.status-line.success { color: var(--success); }

.chat-view {
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: max(0.8rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) 0.8rem max(1rem, env(safe-area-inset-left));
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(9, 11, 16, 0.88);
  backdrop-filter: blur(18px);
}

.account-chip,
.icon-button,
.credit-button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.5rem 0.7rem;
  font-size: 0.8rem;
}
.account-chip { display: flex; align-items: center; gap: 0.55rem; }
.status-dot { width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--success); box-shadow: 0 0 10px rgba(85, 214, 158, 0.65); }
.header-actions { display: flex; align-items: center; gap: 0.55rem; }
.credit-button { display: flex; align-items: baseline; gap: 0.45rem; color: var(--muted); }
.credit-button strong { color: var(--cyan); font-size: 0.9rem; }
.icon-button { border-color: transparent; }

.chat-shell {
  min-height: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  width: min(100%, 52rem);
  margin: 0 auto;
  padding: 0 clamp(0.75rem, 3vw, 1.5rem) max(0.8rem, env(safe-area-inset-bottom));
}

.chat-transcript {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-padding-bottom: 1rem;
  padding: clamp(1rem, 4vh, 2.5rem) 0 1rem;
  scrollbar-width: thin;
}

.chat-empty {
  min-height: 100%;
  display: grid;
  place-content: center;
  text-align: center;
  color: var(--muted);
}
.chat-empty h2 { margin: 0.65rem 0 0.15rem; color: var(--text); font-size: 1.45rem; }
.chat-empty p { margin: 0; font-size: 0.85rem; }
.spark-glyph { color: var(--accent-strong); font-size: 1.6rem; }

.chat-message {
  max-width: 88%;
  min-width: 0;
  margin: 0.85rem 0;
  padding: 0.8rem 0.95rem;
  border-radius: 1rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.055);
}
.chat-message.user { margin-left: auto; background: var(--accent-soft); border-color: rgba(139, 124, 255, 0.27); }
.chat-message.assistant { width: 100%; max-width: 100%; margin-right: auto; }
.chat-message > .chat-role { display: block; margin-bottom: 0.4rem; color: var(--muted); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; }
.chat-message.user .message-content { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.message-content { min-width: 0; }

.markdown-body { color: var(--text); overflow-wrap: anywhere; word-break: break-word; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body > :last-child { margin-bottom: 0; }
.markdown-body p { margin: 0.65rem 0; }
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin: 1.1rem 0 0.5rem;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.markdown-body h1 { font-size: 1.35rem; }
.markdown-body h2 { font-size: 1.2rem; }
.markdown-body h3 { font-size: 1.05rem; }
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 { font-size: 0.95rem; }
.markdown-body ul,
.markdown-body ol { margin: 0.65rem 0; padding-left: 1.45rem; }
.markdown-body li { margin: 0.28rem 0; padding-left: 0.1rem; }
.markdown-body li > p { margin: 0.25rem 0; }
.markdown-body blockquote {
  margin: 0.8rem 0;
  padding: 0.15rem 0 0.15rem 0.8rem;
  border-left: 3px solid var(--accent);
  color: #c3c8d3;
}
.markdown-body code {
  padding: 0.12rem 0.32rem;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 0.35rem;
  background: #090c12;
  color: #d8d3ff;
  font: 0.88em/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.markdown-body pre {
  max-width: 100%;
  margin: 0.8rem 0;
  padding: 0.8rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: #080a0f;
  -webkit-overflow-scrolling: touch;
}
.markdown-body pre code { display: block; min-width: max-content; padding: 0; border: 0; background: transparent; white-space: pre; word-break: normal; }
.markdown-body table {
  display: block;
  max-width: 100%;
  margin: 0.8rem 0;
  overflow-x: auto;
  border-collapse: collapse;
  -webkit-overflow-scrolling: touch;
}
.markdown-body th,
.markdown-body td { padding: 0.45rem 0.6rem; border: 1px solid var(--border); text-align: left; white-space: nowrap; }
.markdown-body th { background: #151923; color: var(--accent-strong); }
.markdown-body a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
.markdown-body hr { margin: 1rem 0; border: 0; border-top: 1px solid var(--border); }
.message-warning {
  margin: 0.8rem 0 0;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(255, 125, 136, 0.25);
  color: #ffb2b9;
  font-size: 0.78rem;
}

.composer-wrap {
  border: 1px solid var(--border-strong);
  border-radius: 1rem;
  background: var(--surface);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  overflow: hidden;
}
#chat-input {
  display: block;
  width: 100%;
  min-height: 3.25rem;
  max-height: 10rem;
  resize: none;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 0.9rem 1rem 0.55rem;
}
#chat-input:focus { outline: 0; }
.output-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  padding: 0.15rem 0.8rem 0.35rem;
  color: var(--muted);
  font-size: 0.75rem;
}
.output-controls label { font-weight: 700; }
.output-controls select {
  max-width: 10rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: #151923;
  color: var(--text);
  padding: 0.32rem 0.45rem;
}
.output-mode-note {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.output-mode-note.warning { color: #ffd38a; }
.composer-bar { display: flex; align-items: center; gap: 0.35rem; padding: 0.35rem 0.45rem 0.45rem 0.8rem; }
.stream-toggle { display: flex; align-items: center; gap: 0.35rem; color: var(--muted); font-size: 0.75rem; }
.stream-toggle input { accent-color: var(--accent); }
.chat-meter { margin-right: auto; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.send-button, .stop-button, .continue-button { height: 2.2rem; padding: 0; display: grid; place-items: center; border-radius: 0.65rem; }
.send-button { width: 2.2rem; }
.stop-button { width: auto; padding: 0 0.65rem; background: #3b2630; color: #ffb2b9; }
.continue-button { width: auto; padding: 0 0.65rem; background: #22382f; color: #9af0c8; }

.modal {
  width: min(calc(100% - 2rem), 29rem);
  max-height: calc(100dvh - 2rem);
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 1rem;
  background: var(--surface-raised);
  color: var(--text);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.62);
}
.modal::backdrop { background: rgba(1, 3, 7, 0.78); backdrop-filter: blur(4px); }
.modal-card { position: relative; padding: 1.35rem; overflow-y: auto; }
.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 2rem;
  height: 2rem;
  padding: 0;
  background: transparent;
  color: var(--muted);
  font-size: 1.35rem;
}
.modal-copy { margin: 0 2rem 1rem 0; }
.modal label { display: block; color: var(--muted); font-size: 0.78rem; font-weight: 700; margin: 0.9rem 0 0.4rem; }

.account-reveal { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; align-items: stretch; margin: 0.9rem 0; }
.account-reveal code,
.account-number-display {
  display: grid;
  place-items: center;
  min-width: 0;
  padding: 0.8rem;
  color: var(--cyan);
  font: 700 0.95rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.055em;
  white-space: nowrap;
}
.account-number-display { margin: 1rem 0; }

.amount-field { display: flex; align-items: center; }
.amount-field input { min-width: 0; flex: 1; border: 0; outline: 0; background: transparent; color: var(--text); padding: 0.8rem; font-size: 1rem; }
.amount-field span { color: var(--muted); padding: 0 0.85rem; font-size: 0.85rem; }

.invoice-panel { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.qr-frame { width: min(100%, 16rem); aspect-ratio: 1; margin: 0 auto; padding: 0.7rem; border-radius: 0.75rem; background: #fff; }
.qr-frame img { display: block; width: 100%; height: 100%; image-rendering: pixelated; }
.invoice-amount { text-align: center; color: var(--cyan); font-weight: 800; }
.invoice-text { display: block; resize: none; padding: 0.75rem; font: 0.72rem/1.35 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; word-break: break-all; }
.invoice-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.55rem; margin-top: 0.65rem; }
.payment-status { min-height: 1.3rem; margin: 0.75rem 0 0; text-align: center; color: var(--muted); font-size: 0.82rem; }
.payment-status.success { color: var(--success); }
.stack-actions { display: grid; gap: 0.6rem; }

@media (max-width: 620px) {
  .chat-header { gap: 0.4rem; }
  .account-chip { max-width: 8rem; overflow: hidden; }
  .account-chip span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .credit-button span { display: none; }
  .icon-button { padding-inline: 0.45rem; }
  .chat-shell { padding-inline: 0.65rem; }
  .chat-message { max-width: 94%; padding: 0.75rem 0.8rem; }
  .chat-message.assistant { max-width: 100%; }
  .markdown-body pre { margin-inline: -0.15rem; padding: 0.7rem; }
  .markdown-body table { font-size: 0.84rem; }
  .chat-meter { display: none; }
  .output-controls { align-items: flex-start; flex-wrap: wrap; padding-inline: 0.6rem; }
  .output-mode-note { flex-basis: 100%; white-space: normal; }
  .composer-bar { padding-left: 0.55rem; }
  .text-button { padding-inline: 0.4rem; }
  .account-reveal { grid-template-columns: 1fr; }
  .account-reveal code { font-size: 0.86rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}