:root {
  color-scheme: dark;
  --bg: #09111f;
  --surface: #101c2d;
  --surface-2: #15243a;
  --line: #2b3b53;
  --text: #edf4ff;
  --muted: #9fb0c8;
  --accent: #7bd7c4;
  --danger: #ff9eaa;
  --warning: #ffd28a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 10% 0%, #17304d 0, var(--bg) 36rem); color: var(--text); }
button, input, textarea, select { font: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.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; }
.skip-link { position: fixed; z-index: 30; top: 1rem; left: 1rem; transform: translateY(-200%); padding: .75rem 1rem; border-radius: .6rem; background: var(--accent); color: #06120f; }
.skip-link:focus { transform: translateY(0); }

.topbar { position: sticky; z-index: 20; top: 0; display: flex; align-items: center; justify-content: space-between; min-height: 4.25rem; padding: .75rem clamp(1rem, 3vw, 2.5rem); border-bottom: 1px solid rgb(255 255 255 / 8%); background: rgb(9 17 31 / 88%); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: .75rem; color: var(--text); font-weight: 760; text-decoration: none; }
.brand-mark { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: .65rem; background: linear-gradient(135deg, var(--accent), #7da7ff); color: #07131e; }
.topbar-actions { display: flex; align-items: center; gap: .75rem; }
.session-label { color: var(--muted); font-size: .9rem; }

.auth-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(20rem, .9fr); gap: clamp(2rem, 6vw, 7rem); align-items: center; width: min(76rem, calc(100% - 2rem)); min-height: calc(100vh - 4.25rem); margin: 0 auto; padding: 4rem 0; }
.promise-panel { max-width: 43rem; }
.eyebrow { margin: 0 0 .5rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(2.25rem, 5vw, 4.7rem); line-height: 1.02; letter-spacing: -.045em; }
h2 { margin: 0; font-size: clamp(1.4rem, 2vw, 2rem); letter-spacing: -.025em; }
h3 { margin: 0; font-size: 1rem; }
.lede { max-width: 42rem; color: var(--muted); font-size: clamp(1rem, 1.7vw, 1.2rem); line-height: 1.7; }
.supporting-copy { margin: .35rem 0 1rem; color: var(--muted); line-height: 1.55; }
.promise-list { display: grid; gap: .85rem; margin: 2rem 0 0; padding: 0; list-style: none; }
.promise-list li { display: grid; grid-template-columns: 5rem 1fr; gap: 1rem; align-items: baseline; padding: 1rem 0; border-top: 1px solid var(--line); }
.promise-list span { color: var(--muted); }

.auth-card, .card { border: 1px solid var(--line); border-radius: 1.25rem; background: linear-gradient(160deg, rgb(21 36 58 / 96%), rgb(13 25 42 / 96%)); box-shadow: 0 18px 48px rgb(0 0 0 / 28%); }
.auth-card { padding: clamp(1.2rem, 3vw, 2rem); }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem; margin-bottom: 2rem; padding: .3rem; border-radius: .8rem; background: rgb(0 0 0 / 18%); }
.tabs.three-tabs { grid-template-columns: repeat(3, 1fr); }
.tabs button { border: 0; border-radius: .55rem; padding: .75rem; background: transparent; color: var(--muted); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--surface-2); color: var(--text); }
.stack-form { display: grid; gap: 1rem; }
.stack-form > div { margin-bottom: .5rem; }
.separated-form, .split-form { margin-top: 1.2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.split-form { display: grid; grid-template-columns: 1fr auto; gap: .75rem; align-items: end; }
label { display: grid; gap: .45rem; color: var(--muted); font-size: .88rem; font-weight: 650; }
input, textarea, select { width: 100%; border: 1px solid var(--line); border-radius: .7rem; padding: .82rem .9rem; background: #0b1626; color: var(--text); }
textarea { resize: vertical; line-height: 1.55; }
select { appearance: auto; }
.button { border: 1px solid transparent; border-radius: .7rem; padding: .78rem 1rem; font-weight: 760; cursor: pointer; }
.button.primary { background: var(--accent); color: #061512; }
.button.secondary { border-color: var(--line); background: var(--surface-2); color: var(--text); }
.button.ghost { border-color: var(--line); background: transparent; color: var(--text); }
button:disabled, input:disabled, textarea:disabled, select:disabled { cursor: not-allowed; opacity: .48; }
.feedback { min-height: 1.5rem; margin-top: 1rem; color: var(--muted); font-size: .9rem; }
.feedback[data-kind="error"] { color: var(--danger); }
.sticky-feedback { position: sticky; z-index: 8; top: 4.5rem; margin: 0 0 .5rem; padding: .4rem .6rem; background: rgb(9 17 31 / 92%); }

.studio-layout { display: grid; grid-template-columns: 17rem minmax(0, 1fr); min-height: calc(100vh - 4.25rem); }
.journey-sidebar { position: sticky; top: 4.25rem; align-self: start; min-height: calc(100vh - 4.25rem); padding: 2rem 1.25rem; border-right: 1px solid var(--line); background: rgb(8 17 30 / 72%); }
.organization-block { display: grid; gap: .3rem; margin-bottom: 1.4rem; padding: 0 .5rem; }
.organization-block strong { overflow: hidden; text-overflow: ellipsis; }
.organization-block span { color: var(--muted); font-size: .82rem; }
.project-picker-block { display: grid; gap: .65rem; margin-bottom: 1.4rem; padding: 0 .5rem 1.25rem; border-bottom: 1px solid var(--line); }
.project-picker-block .button { width: 100%; }
.journey-steps { display: grid; gap: .35rem; margin: 0; padding: 0; list-style: none; }
.journey-steps li { display: grid; grid-template-columns: 2rem 1fr; gap: .55rem; align-items: center; padding: .85rem .7rem; border-radius: .7rem; color: var(--muted); }
.journey-steps li span { font: 700 .7rem/1 ui-monospace, monospace; }
.journey-steps li.complete { background: rgb(123 215 196 / 9%); color: var(--text); }
.journey-steps li.complete span { color: var(--accent); }

.studio-workspace { width: min(82rem, 100%); margin: 0 auto; padding: 1.25rem clamp(1rem, 3vw, 3rem) 5rem; }
.project-create-card { max-width: 52rem; margin: clamp(2rem, 8vh, 7rem) auto; padding: clamp(1.5rem, 4vw, 3rem); }
.project-create-card h1 { max-width: 44rem; font-size: clamp(2rem, 4vw, 3.6rem); }
.wide-form { margin-top: 2rem; }
.project-heading { display: flex; gap: 2rem; align-items: start; justify-content: space-between; margin: 1rem 0 1.5rem; }
.project-heading h1 { font-size: clamp(2rem, 4vw, 3.5rem); }
.heading-actions { display: flex; flex: 0 0 auto; gap: .65rem; align-items: center; }
.revision-pill { flex: 0 0 auto; border: 1px solid var(--line); border-radius: 999px; padding: .65rem .9rem; color: var(--muted); }
.revision-pill strong { color: var(--text); }
.status-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; margin-bottom: .8rem; }
.metric { display: grid; gap: .35rem; min-height: 6.2rem; padding: 1rem; border: 1px solid var(--line); border-radius: .9rem; background: rgb(16 28 45 / 72%); }
.metric span { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; }
.metric strong { align-self: end; overflow-wrap: anywhere; }
.workspace-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(19rem, .75fr); gap: .8rem; }
.card { padding: 1.25rem; }
.card-heading { display: flex; justify-content: space-between; gap: 1rem; align-items: start; margin-bottom: 1rem; }
.status-dot { border: 1px solid rgb(123 215 196 / 35%); border-radius: 999px; padding: .35rem .6rem; color: var(--accent); font-size: .72rem; }
.agent-card { display: grid; grid-template-rows: auto auto minmax(18rem, 1fr); min-height: 35rem; }
.message-list { display: flex; flex-direction: column; gap: .75rem; overflow-y: auto; padding: .35rem .2rem 1rem; }
.message { max-width: 88%; border-radius: .9rem; padding: .85rem 1rem; background: var(--surface-2); }
.message.customer { align-self: end; background: rgb(123 215 196 / 14%); }
.message.system { border: 1px solid rgb(255 158 170 / 25%); }
.message p { margin: .4rem 0; color: #d9e5f4; line-height: 1.55; white-space: pre-wrap; }
.message small { color: var(--muted); }
.empty-state { align-self: center; margin: auto; max-width: 30rem; color: var(--muted); text-align: center; line-height: 1.6; }
.action-list { display: grid; gap: .65rem; }
.journey-action { display: grid; gap: .25rem; width: 100%; border: 1px solid var(--line); border-radius: .8rem; padding: .9rem; background: #0d1929; color: var(--text); text-align: left; cursor: pointer; }
.journey-action:hover:not(:disabled) { border-color: var(--accent); transform: translateY(-1px); }
.journey-action.consequential:not(:disabled) { border-color: rgb(255 210 138 / 42%); }
.journey-action small { color: var(--muted); line-height: 1.4; }
.action-link { min-height: 2rem; padding-top: 1rem; }
.action-link a { color: var(--accent); }
.evidence-list { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: .4rem .7rem; margin: 0; }
.evidence-list dt { color: var(--muted); font-size: .78rem; }
.evidence-list dd { margin: 0; overflow: hidden; color: var(--text); font: .75rem/1.5 ui-monospace, monospace; text-overflow: ellipsis; }

.revision-card, .operation-card { margin-top: .8rem; }
.revision-list { display: grid; gap: .65rem; }
.revision-item { padding: 1rem; border: 1px solid var(--line); border-radius: .85rem; background: rgb(11 22 38 / 72%); }
.revision-item-heading { display: flex; gap: 1rem; justify-content: space-between; }
.revision-item-heading small { color: var(--muted); }
.revision-item p { margin: .5rem 0 0; }
.inline-actions { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: .9rem; }
.usage-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .75rem; }
.usage-grid article { display: grid; gap: .4rem; padding: .8rem; border-left: 2px solid var(--line); }
.usage-grid span { color: var(--muted); font-size: .8rem; }
.operations-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.compact-form { align-content: start; padding: 1rem; border: 1px solid var(--line); border-radius: .85rem; background: rgb(11 22 38 / 55%); }

#confirmation-dialog { width: min(34rem, calc(100% - 2rem)); border: 1px solid var(--line); border-radius: 1rem; padding: 0; background: var(--surface); color: var(--text); }
#confirmation-dialog::backdrop { background: rgb(0 0 0 / 72%); backdrop-filter: blur(4px); }
.dialog-content { display: grid; gap: 1rem; padding: 1.5rem; }
.dialog-content strong { color: var(--warning); }
.dialog-actions { display: flex; justify-content: flex-end; gap: .65rem; }

@media (max-width: 1000px) {
  .workspace-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .auth-layout { grid-template-columns: 1fr; padding: 2rem 0 4rem; }
  .studio-layout { grid-template-columns: 1fr; }
  .journey-sidebar { position: static; min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); padding: 1rem; }
  .organization-block { margin-bottom: .8rem; }
  .project-picker-block { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
  .project-picker-block label { grid-column: 1; }
  .project-picker-block select { grid-column: 1; }
  .project-picker-block .button { grid-column: 2; grid-row: 2; width: auto; }
  .journey-steps { grid-template-columns: repeat(6, minmax(7rem, 1fr)); overflow-x: auto; }
  .status-grid, .usage-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .topbar { padding-inline: .8rem; }
  .session-label { display: none; }
  .auth-layout { width: min(100% - 1rem, 40rem); }
  .tabs.three-tabs { grid-template-columns: 1fr; }
  .promise-list li { grid-template-columns: 1fr; gap: .25rem; }
  .split-form { grid-template-columns: 1fr; }
  .status-grid, .usage-grid, .operations-grid { grid-template-columns: 1fr; }
  .project-heading { flex-direction: column; }
  .heading-actions { width: 100%; flex-wrap: wrap; }
  .studio-workspace { padding-inline: .65rem; }
  .revision-item-heading { flex-direction: column; gap: .25rem; }
  .dialog-actions { flex-direction: column-reverse; }
  .dialog-actions .button { width: 100%; }
}

@media (prefers-reduced-motion: no-preference) {
  button, .journey-action { transition: border-color 140ms ease, background-color 140ms ease, transform 140ms ease; }
}

html { min-width: 320px; }

@media (max-width: 560px) {
  .topbar,
  .studio-workspace,
  .auth-layout { padding-left: 1rem; padding-right: 1rem; }
  .topbar,
  .topbar-actions,
  .project-heading,
  .card-heading,
  .heading-actions { align-items: stretch; flex-direction: column; }
  .status-grid,
  .usage-grid,
  .workspace-grid,
  .operations-grid,
  .split-form { grid-template-columns: minmax(0, 1fr); }
  .button,
  .journey-action,
  input,
  textarea,
  select { width: 100%; }
}