@font-face {
  font-family: "DM Sans";
  src: local("DM Sans");
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: local("JetBrains Mono");
  font-display: swap;
}

:root {
  --bg: #0d0f13;
  --surface: #171a21;
  --surface-raised: #1e222b;
  --surface-soft: #13161c;
  --border: #303541;
  --border-strong: #444b59;
  --text: #f2f1ed;
  --muted: #9298a5;
  --accent: #5e93ff;
  --accent-bright: #8db2ff;
  --accent-soft: rgba(94, 147, 255, 0.12);
  --success: #45d6a1;
  --success-soft: rgba(69, 214, 161, 0.1);
  --warning: #efbd67;
  --warning-soft: rgba(239, 189, 103, 0.11);
  --danger: #ff7f7f;
  --danger-soft: rgba(255, 127, 127, 0.1);
  --radius: 16px;
  --radius-small: 10px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.24);
}

* { box-sizing: border-box; }

html { color-scheme: dark; scroll-behavior: smooth; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--bg);
  background-size: 40px 40px;
  color: var(--text);
  font-family: "DM Sans", "Avenir Next", sans-serif;
  line-height: 1.5;
}

button, input, select { font: inherit; }
button { color: inherit; }

.ambient {
  position: fixed;
  z-index: -1;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.12;
  pointer-events: none;
}

.ambient-one { top: -220px; left: 12%; background: var(--accent); }
.ambient-two { right: 4%; bottom: -280px; background: var(--success); opacity: 0.07; }

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header,
.workspace,
.global-status {
  width: min(920px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 54px 0 34px;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: clamp(2rem, 6vw, 3.35rem); line-height: 1; letter-spacing: -0.055em; }
h1 span { color: var(--accent-bright); }
h2 { margin-bottom: 5px; font-size: 1.35rem; letter-spacing: -0.025em; }

.eyebrow {
  margin-bottom: 7px;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.subtitle, .muted, .panel-toolbar p { color: var(--muted); }
.subtitle { margin-bottom: 0; }

.session-actions { display: flex; align-items: center; gap: 12px; min-height: 44px; }
.session-label { max-width: 230px; color: var(--muted); font-size: 0.85rem; text-align: right; overflow-wrap: anywhere; }

.workspace { padding-bottom: 80px; }
.panel {
  margin-bottom: 18px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(255,255,255,0.018), transparent 45%), var(--surface);
  box-shadow: var(--shadow);
}

.gate {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
  padding: 42px;
}
.gate-mark {
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  border: 1px solid rgba(141, 178, 255, 0.34);
  border-radius: 22px;
  background: var(--accent-soft);
  color: var(--accent-bright);
  font-family: "JetBrains Mono", monospace;
  font-size: 2rem;
  font-weight: 700;
}
.gate p:not(.eyebrow) { max-width: 560px; color: var(--muted); }

.global-status {
  position: sticky;
  z-index: 4;
  top: 12px;
  margin-bottom: 18px;
  padding: 12px 16px;
  border: 1px solid var(--warning);
  border-radius: var(--radius-small);
  background: #292315;
  color: #ffe1aa;
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
}
.global-status[data-tone="error"] { border-color: var(--danger); background: #2c191b; color: #ffd0d0; }

.panel-toggle {
  display: flex;
  width: 100%;
  min-height: 108px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 28px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.panel-toggle:hover { background: rgba(255,255,255,.018); }
.panel-toggle-copy { display: flex; min-width: 0; flex-direction: column; }
.panel-toggle-copy strong { margin-bottom: 3px; font-size: 1.08rem; }
.panel-toggle-copy .eyebrow { margin-bottom: 4px; }
.panel-toggle-action { display: flex; align-items: center; gap: 16px; color: var(--muted); }
.panel-toggle[aria-expanded="true"] .panel-toggle-action > span:last-child { transform: rotate(180deg); }

.collapsible { padding: 0 28px 28px; border-top: 1px solid var(--border); }
.panel-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; padding-top: 24px; }
.panel-toolbar p { margin-bottom: 0; }
.inline-note, .decision-block {
  border: 1px solid rgba(239, 189, 103, .27);
  border-radius: var(--radius-small);
  background: var(--warning-soft);
  color: #dcc9a7;
}
.inline-note { padding: 12px 14px; font-size: .86rem; }

.run-form-panel, .current-run { padding: 30px; }
.section-heading { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading .eyebrow { margin-bottom: 2px; }
.section-number {
  color: var(--accent-bright);
  font-family: "JetBrains Mono", monospace;
  font-size: 1.6rem;
  font-weight: 700;
}

.fieldset-reset { min-width: 0; margin: 0 0 24px; padding: 0; border: 0; }
.fieldset-reset legend { margin-bottom: 12px; color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.upload-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.upload-zone {
  position: relative;
  display: grid;
  min-height: 150px;
  place-content: center;
  padding: 22px;
  border: 1px dashed var(--border-strong);
  border-radius: 13px;
  background: var(--surface-soft);
  text-align: center;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}
.upload-zone:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.upload-zone.has-file { border-style: solid; border-color: rgba(69, 214, 161, .6); background: var(--success-soft); }
.upload-zone input { position: absolute; inset: 0; width: 100%; opacity: 0; cursor: pointer; }
.upload-glyph { color: var(--accent-bright); font-size: 1.6rem; }
.upload-title { margin-top: 3px; font-weight: 700; }
.upload-hint { color: var(--muted); font-size: .78rem; }
.upload-name { margin-top: 9px; color: var(--accent-bright); font-family: "JetBrains Mono", monospace; font-size: .72rem; overflow-wrap: anywhere; }
.upload-zone.has-file .upload-name { color: var(--success); }
.field-error { min-height: 1em; color: var(--danger); font-size: .76rem; font-weight: 600; }
.upload-zone .field-error { margin-top: 5px; }
[aria-invalid="true"] { border-color: var(--danger) !important; }

.period-fields { display: grid; grid-template-columns: 120px 180px 1fr; gap: 14px; }
.period-fields legend { grid-column: 1 / -1; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field > span { color: var(--muted); font-size: .82rem; font-weight: 600; }
.field select {
  width: 100%;
  min-height: 46px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-raised);
  color: var(--text);
}

.decision-block { display: flex; gap: 13px; margin: 2px 0 20px; padding: 15px; }
.decision-block p { margin: 3px 0 0; font-size: .88rem; }
.decision-icon { display: grid; width: 25px; height: 25px; flex: 0 0 auto; place-items: center; border-radius: 50%; background: var(--warning); color: #271d0b; font-weight: 800; }

.button {
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 700;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
.button:not(:disabled):hover { transform: translateY(-1px); }
.button:disabled { opacity: .46; cursor: not-allowed; }
.button-primary { background: var(--accent); color: #07101f; }
.button-primary:not(:disabled):hover { background: var(--accent-bright); }
.button-secondary { border-color: var(--border-strong); background: var(--surface-raised); }
.button-quiet { border-color: transparent; background: transparent; color: var(--muted); }
.button-full { width: 100%; min-height: 54px; font-size: 1rem; }

.validation-summary { margin-bottom: 20px; padding: 13px 15px; border: 1px solid var(--danger); border-radius: 10px; background: var(--danger-soft); color: #ffd0d0; }
.validation-summary ul { margin: 7px 0 0; padding-left: 20px; }

.run-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.status-pill { display: inline-flex; min-height: 28px; align-items: center; padding: 4px 10px; border-radius: 999px; font-family: "JetBrains Mono", monospace; font-size: .68rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.status-neutral { background: rgba(146, 152, 165, .13); color: #bdc2cc; }
.status-progress { background: var(--accent-soft); color: var(--accent-bright); }
.status-success { background: var(--success-soft); color: var(--success); }
.status-warning { background: var(--warning-soft); color: var(--warning); }
.status-error { background: var(--danger-soft); color: var(--danger); }

.timeline { display: grid; gap: 1px; margin: 28px 0; padding: 0; list-style: none; }
.timeline li { position: relative; display: flex; gap: 13px; min-height: 42px; align-items: flex-start; color: var(--muted); }
.timeline li::before { content: ""; width: 9px; height: 9px; margin-top: 6px; border: 2px solid var(--border-strong); border-radius: 50%; background: var(--surface); }
.timeline li:not(:last-child)::after { content: ""; position: absolute; top: 18px; bottom: -2px; left: 5px; width: 1px; background: var(--border); }
.timeline li.done { color: var(--text); }
.timeline li.done::before { border-color: var(--success); background: var(--success); }
.timeline li.active { color: var(--accent-bright); }
.timeline li.active::before { border-color: var(--accent); box-shadow: 0 0 0 5px var(--accent-soft); }
.run-message { padding: 14px 0; color: var(--muted); }
.run-actions { display: flex; gap: 10px; }

.stack, .history-list { display: grid; gap: 10px; margin-top: 18px; }
.list-card, .history-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface-soft);
}
.list-card p, .history-row p { margin: 2px 0 0; color: var(--muted); font-size: .8rem; }
.list-actions { display: flex; align-items: center; gap: 9px; }
.empty-state { padding: 30px; border: 1px dashed var(--border); border-radius: 12px; color: var(--muted); text-align: center; }

.skeleton-card { display: grid; gap: 10px; padding: 18px; }
.skeleton-card span { display: block; height: 12px; border-radius: 8px; background: linear-gradient(90deg, var(--surface-raised), #292e38, var(--surface-raised)); background-size: 200% 100%; animation: shimmer 1.4s infinite; }
.skeleton-card span:nth-child(2) { width: 65%; }
.skeleton-card span:nth-child(3) { width: 42%; }

:focus-visible { outline: 3px solid var(--accent-bright); outline-offset: 3px; }
[hidden] { display: none !important; }

@keyframes shimmer { to { background-position: -200% 0; } }

@media (max-width: 720px) {
  .site-header { flex-direction: column; padding-top: 34px; }
  .session-actions, .session-label { text-align: left; }
  .upload-grid, .period-fields { grid-template-columns: 1fr; }
  .period-fields legend { grid-column: auto; }
  .panel-toolbar, .run-header, .list-card, .history-row { align-items: stretch; flex-direction: column; }
  .panel-toggle, .run-form-panel, .current-run { padding: 22px; }
  .collapsible { padding: 0 22px 22px; }
  .gate { grid-template-columns: 1fr; padding: 28px; }
}

@media (max-width: 440px) {
  .site-header, .workspace, .global-status { width: min(100% - 24px, 920px); }
  .panel-toggle-action .status-pill { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}