:root {
  color-scheme: dark;
  --bg: #08141c;
  --panel: rgba(10, 27, 38, 0.9);
  --panel-strong: rgba(13, 24, 36, 0.96);
  --panel-solid: #10232f;
  --stroke: rgba(145, 190, 201, 0.18);
  --text: #eff7fb;
  --muted: #9eb6c4;
  --accent: #72f5bc;
  --accent-2: #f4b942;
  --danger: #ff6f7d;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  overflow-x: hidden;
  font-family: Bahnschrift, "Segoe UI Variable", "Malgun Gothic", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(114, 245, 188, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(244, 185, 66, 0.15), transparent 22%),
    linear-gradient(145deg, #071018 0%, #0f2431 48%, #07131d 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 90%);
  opacity: 0.85;
  pointer-events: none;
}

.page-shell {
  position: relative;
  max-width: 1480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
}

.tab-panels,
.tab-panel,
.browser-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.tab-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tab-button {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(7, 20, 29, 0.82);
  color: var(--muted);
  padding: 12px 18px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, color 140ms ease, background 140ms ease;
}

.tab-button:hover {
  transform: translateY(-1px);
  border-color: rgba(114, 245, 188, 0.28);
  color: var(--text);
}

.tab-button.is-active {
  border-color: rgba(114, 245, 188, 0.4);
  background: linear-gradient(135deg, rgba(114, 245, 188, 0.18), rgba(95, 224, 255, 0.12));
  color: #f7fffc;
  box-shadow: 0 12px 28px rgba(7, 24, 31, 0.28);
}

.tab-panel[hidden] {
  display: none;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.brand-block,
.panel-card,
.chat-log,
.composer-card {
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

@supports (backdrop-filter: blur(1px)) {
  @media (hover: hover) and (pointer: fine) {
    .brand-block,
    .panel-card,
    .chat-log,
    .composer-card {
      backdrop-filter: blur(18px);
    }
  }
}

.brand-block,
.panel-card,
.composer-card {
  padding: 22px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.privacy-notice {
  margin: 0 0 14px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(244, 185, 66, 0.42);
  background:
    linear-gradient(135deg, rgba(244, 185, 66, 0.18), rgba(255, 111, 125, 0.16)),
    rgba(31, 16, 7, 0.88);
  color: #fff2cc;
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.55;
  box-shadow: 0 18px 36px rgba(244, 185, 66, 0.12);
}

h1,
h2 {
  margin: 0;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
}

h2 {
  font-size: clamp(1.2rem, 2vw, 1.7rem);
}

.lede,
.request-status,
.drop-zone p,
.status-grid dd,
.status-grid dt,
.diag-note {
  color: var(--muted);
}

.panel-title-row,
.composer-actions,
.message-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 0;
}

.status-grid div {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.status-grid dt {
  margin-bottom: 8px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-grid dd {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text);
  overflow-wrap: anywhere;
}

.diag-note {
  margin: 16px 0 0;
  font-size: 0.84rem;
}

.diag-note code {
  color: var(--text);
}

.field-label {
  display: block;
  margin: 16px 0 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.field-hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.field-hint.is-error {
  color: #ffd8dd;
}

.field-hint[hidden] {
  display: none;
}

.text-input,
.text-area,
.composer-input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(4, 13, 18, 0.76);
  color: var(--text);
  padding: 14px 16px;
  font: inherit;
}

.text-input.is-invalid {
  border-color: rgba(255, 111, 125, 0.78);
  box-shadow: 0 0 0 1px rgba(255, 111, 125, 0.28);
}

.text-area,
.composer-input {
  resize: vertical;
}

.chat-log {
  min-height: 46vh;
  max-height: 52vh;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 18px;
}

.composer-card {
  background: linear-gradient(180deg, rgba(10, 27, 38, 0.96), rgba(10, 20, 30, 0.96));
}

.drop-zone {
  display: grid;
  place-items: center;
  min-height: 120px;
  border: 1.5px dashed rgba(114, 245, 188, 0.32);
  border-radius: 22px;
  text-align: center;
  background: rgba(114, 245, 188, 0.05);
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.drop-zone.dragging {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: rgba(114, 245, 188, 0.12);
}

.drop-zone input {
  margin-top: 14px;
}

.drop-helper {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.6;
}

.drop-helper code {
  color: var(--text);
}

.preview-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.preview-chip {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-width: min(100%, 420px);
  padding: 8px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.preview-chip span {
  overflow-wrap: anywhere;
}

.preview-chip img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 14px;
}

.preview-chip button,
.ghost-button,
.send-button {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  font: inherit;
  cursor: pointer;
}

.preview-chip button,
.ghost-button {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.send-button {
  min-width: 180px;
  background: linear-gradient(90deg, var(--accent), #5fe0ff);
  color: #031016;
  font-weight: 700;
}

.send-button:disabled {
  cursor: progress;
  opacity: 0.72;
}

.token-dialog {
  width: min(100% - 28px, 520px);
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.token-dialog::backdrop {
  background: rgba(3, 10, 16, 0.72);
  backdrop-filter: blur(10px);
}

.token-dialog-card {
  margin: 0;
  padding: 24px;
  border: 1px solid var(--stroke);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(114, 245, 188, 0.08), transparent 52%),
    linear-gradient(335deg, rgba(244, 185, 66, 0.1), transparent 42%),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

.dialog-copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 20px;
}

.message-card {
  padding: 16px 18px;
  border-radius: 22px;
  margin-bottom: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.message-card.user {
  background: rgba(114, 245, 188, 0.09);
}

.message-card.assistant {
  background: rgba(95, 224, 255, 0.08);
}

.message-card.system {
  background: rgba(244, 185, 66, 0.08);
}

.message-role {
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.message-meta {
  font-size: 0.82rem;
  color: var(--muted);
}

.message-body,
.thought-body {
  overflow-wrap: anywhere;
  line-height: 1.7;
}

.message-body {
  font-size: 1rem;
  color: var(--text);
}

.message-body > :first-child {
  margin-top: 0;
}

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

.message-body p,
.message-body ul,
.message-body ol,
.message-body blockquote,
.message-body pre,
.message-body .md-table-wrap {
  margin: 0 0 1rem;
}

.message-body h1,
.message-body h2,
.message-body h3,
.message-body h4,
.message-body h5,
.message-body h6 {
  margin: 1.15rem 0 0.65rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fbfeff;
}

.message-body h1 {
  font-size: 1.7rem;
}

.message-body h2 {
  font-size: 1.4rem;
}

.message-body h3 {
  font-size: 1.2rem;
}

.message-body strong {
  font-weight: 800;
  color: #ffffff;
}

.message-body em {
  color: #d4fef0;
}

.message-body a {
  color: #8eeeff;
  text-underline-offset: 0.18em;
}

.message-body ul,
.message-body ol {
  padding-left: 1.3rem;
}

.message-body li + li {
  margin-top: 0.34rem;
}

.message-body hr {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin: 1.2rem 0;
}

.message-body blockquote {
  padding: 0.85rem 1rem;
  border-left: 3px solid rgba(114, 245, 188, 0.55);
  border-radius: 0 16px 16px 0;
  background: rgba(255, 255, 255, 0.04);
}

.message-body code {
  padding: 0.14rem 0.42rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.94em;
}

.message-body .md-code {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  overflow: auto;
  background: rgba(4, 13, 18, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.message-body .md-code code {
  padding: 0;
  border-radius: 0;
  background: transparent;
  white-space: pre-wrap;
}

.message-body .md-table-wrap {
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.message-body table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
  background: rgba(255, 255, 255, 0.03);
}

.message-body th,
.message-body td {
  padding: 0.78rem 0.85rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.message-body th {
  font-weight: 800;
  color: #ffffff;
  background: rgba(114, 245, 188, 0.08);
}

.message-body tr:last-child td {
  border-bottom: 0;
}

.thought-body {
  white-space: pre-wrap;
}

.thought-box {
  margin-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding-top: 12px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.pill.pending {
  background: rgba(255, 255, 255, 0.08);
}

.pill.ok {
  background: rgba(114, 245, 188, 0.18);
  color: var(--accent);
}

.pill.bad {
  background: rgba(255, 111, 125, 0.14);
  color: #ff9aa4;
}

.manual-stack,
.manual-grid,
.manual-content,
.manual-card-grid,
.manual-examples {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.manual-grid {
  gap: 18px;
}

.manual-hero {
  background:
    linear-gradient(145deg, rgba(114, 245, 188, 0.08), transparent 46%),
    linear-gradient(325deg, rgba(95, 224, 255, 0.08), transparent 42%),
    var(--panel);
}

.manual-panel h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.manual-item,
.manual-example {
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.manual-item p,
.manual-example p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.manual-item p + p,
.manual-example p + p,
.manual-item .manual-code,
.manual-example .manual-code {
  margin-top: 10px;
}

.manual-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text);
}

.manual-list li {
  line-height: 1.65;
}

.manual-list li + li {
  margin-top: 0.52rem;
}

.manual-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.manual-item-head code {
  color: var(--text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.92rem;
}

.manual-chip,
.manual-method {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.manual-chip {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.manual-method {
  background: rgba(114, 245, 188, 0.15);
  color: var(--accent);
}

.manual-code {
  margin: 12px 0 0;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(4, 13, 18, 0.76);
}

.manual-code.compact {
  padding: 0.78rem 0.9rem;
}

.manual-code code {
  display: block;
  color: var(--text);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.92rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.manual-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.manual-guide-grid {
  margin-top: 18px;
}

.ghost-button:disabled {
  cursor: wait;
  opacity: 0.72;
}

@media (max-width: 1080px) {
  body::before {
    display: none;
  }

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

  .chat-log {
    min-height: 38vh;
    max-height: none;
    overflow: visible;
  }

  .manual-split {
    grid-template-columns: 1fr;
  }

}

@media (hover: none), (pointer: coarse), (max-width: 820px) {
  .page-shell {
    gap: 14px;
    padding: 14px;
  }

  .brand-block,
  .panel-card,
  .chat-log,
  .composer-card {
    background: var(--panel-solid);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
    backdrop-filter: none;
  }

  .composer-card {
    background: var(--panel-solid);
  }

  .drop-zone {
    transition: border-color 140ms ease, background 140ms ease;
  }

  .drop-zone.dragging {
    transform: none;
  }

  .text-area,
  .composer-input {
    resize: none;
  }

  .composer-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .dialog-actions {
    flex-direction: column-reverse;
  }

  .dialog-actions .ghost-button,
  .dialog-actions .send-button {
    width: 100%;
  }

  .send-button {
    min-width: 0;
    width: 100%;
  }
}