:root {
  --bg: #0b0f14;
  --bg-elevated: #121820;
  --bg-input: #0e141c;
  --border: #243041;
  --border-strong: #3a4d66;
  --text: #e7eef8;
  --muted: #8b9bb0;
  --accent: #5b9dff;
  --accent-2: #3dd6c6;
  --danger: #ff6b7a;
  --warn: #f0b429;
  --ok: #3ecf8e;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

body {
  line-height: 1.55;
}

a {
  color: var(--accent);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: rgba(91, 157, 255, 0.1);
  border: 1px solid rgba(91, 157, 255, 0.18);
  border-radius: 6px;
  padding: 0.1em 0.35em;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1000px 500px at 10% -10%, rgba(91, 157, 255, 0.18), transparent 55%),
    radial-gradient(800px 400px at 90% 0%, rgba(61, 214, 198, 0.12), transparent 50%),
    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: auto, auto, 48px 48px, 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

.app {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

/* Header */
.header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(91, 157, 255, 0.25), rgba(61, 214, 198, 0.15));
  border: 1px solid rgba(91, 157, 255, 0.35);
  color: var(--accent-2);
  font-size: 1.4rem;
}

.header h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.header-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.badge {
  font-size: 0.75rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: rgba(18, 24, 32, 0.8);
}

.badge.ok {
  color: var(--ok);
  border-color: rgba(62, 207, 142, 0.35);
}

/* Step nav */
.step-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.step-nav-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 0.4rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(18, 24, 32, 0.65);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.step-nav-item span {
  display: grid;
  place-items: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: #1a2433;
  border: 1px solid var(--border);
  font-size: 0.75rem;
}

.step-nav-item:hover,
.step-nav-item.active {
  color: var(--text);
  border-color: rgba(91, 157, 255, 0.45);
  background: rgba(91, 157, 255, 0.08);
}

.step-nav-item.active span,
.step-nav-item.done span {
  background: linear-gradient(180deg, #4d93ff, #2f74e8);
  border-color: #2f74e8;
  color: #fff;
}

.step-nav-item.done {
  color: var(--ok);
  border-color: rgba(62, 207, 142, 0.3);
}

/* Notice */
.notice {
  background: rgba(240, 180, 41, 0.08);
  border: 1px solid rgba(240, 180, 41, 0.28);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
  color: #f5e6b8;
  font-size: 0.9rem;
}

.notice.compact strong {
  color: var(--warn);
  margin-right: 0.35rem;
}

/* Step cards */
.step-card {
  background: rgba(18, 24, 32, 0.92);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.15rem 1.2rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  scroll-margin-top: 1rem;
}

.step-card.highlight {
  border-color: rgba(91, 157, 255, 0.45);
  box-shadow: 0 0 0 1px rgba(91, 157, 255, 0.15), var(--shadow);
}

.step-head {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  margin-bottom: 0.95rem;
}

.step-num {
  flex: 0 0 auto;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  background: linear-gradient(180deg, #4d93ff, #2f74e8);
  box-shadow: 0 6px 16px rgba(47, 116, 232, 0.35);
}

.step-head h2 {
  margin: 0;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}

.step-head p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.step-body {
  padding-left: 0;
}

@media (min-width: 640px) {
  .step-body {
    padding-left: 3rem;
  }
}

.step-tip {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.step-tip.ok-tip {
  color: #b8f0d3;
}

.step-list {
  margin: 0.85rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.step-list li + li {
  margin-top: 0.35rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.link-box {
  flex: 1 1 220px;
  display: block;
  padding: 0.65rem 0.8rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.82rem;
  word-break: break-all;
  color: #cfe1ff;
}

/* Form */
.field-label {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  align-items: baseline;
  font-weight: 600;
  margin-bottom: 0.55rem;
}

.hint {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.85rem;
}

textarea,
input[type="text"] {
  width: 100%;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 0.95rem;
  font-family: var(--mono);
  font-size: 0.86rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea:focus,
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 157, 255, 0.18);
}

textarea {
  resize: vertical;
  min-height: 200px;
  line-height: 1.45;
}

.row.options {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  margin: 1rem 0;
}

.check {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  cursor: pointer;
}

.field-inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.field-inline input {
  width: 140px;
  padding: 0.45rem 0.6rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.actions.tight {
  gap: 0.5rem;
}

.btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: #182230;
  color: var(--text);
  border-radius: 10px;
  padding: 0.7rem 1.05rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}

a.btn {
  color: var(--text);
}

.btn:hover {
  border-color: var(--accent);
  background: #1c2a3c;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn.primary {
  background: linear-gradient(180deg, #4d93ff, #2f74e8);
  border-color: #2f74e8;
  color: #fff;
}

.btn.primary:hover {
  background: linear-gradient(180deg, #5b9dff, #3b80f0);
}

.btn.ghost {
  background: transparent;
}

/* Status / result */
.status {
  margin-top: 1rem;
  padding: 0.8rem 0.95rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.92rem;
  white-space: pre-wrap;
}

.status.info {
  background: rgba(91, 157, 255, 0.08);
  border-color: rgba(91, 157, 255, 0.28);
  color: #cfe1ff;
}

.status.ok {
  background: rgba(62, 207, 142, 0.08);
  border-color: rgba(62, 207, 142, 0.3);
  color: #b8f0d3;
}

.status.error {
  background: rgba(255, 107, 122, 0.08);
  border-color: rgba(255, 107, 122, 0.3);
  color: #ffd0d5;
}

.status.warn {
  background: rgba(240, 180, 41, 0.08);
  border-color: rgba(240, 180, 41, 0.28);
  color: #f5e6b8;
}

.result {
  margin-top: 1.25rem;
  border-top: 1px solid var(--border);
  padding-top: 1.1rem;
}

.result-head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.result-head h3 {
  margin: 0;
  font-size: 1rem;
}

.meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  margin: 0 0 0.85rem;
  font-size: 0.9rem;
}

.meta dt {
  color: var(--muted);
}

.meta dd {
  margin: 0;
  font-family: var(--mono);
  word-break: break-all;
}

.code {
  margin: 0;
  max-height: 360px;
  overflow: auto;
  background: #0a0e13;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
  color: #d7e4f5;
}

/* Cockpit steps */
.cockpit-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.cockpit-step {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.95rem 1rem 1rem;
  background: rgba(10, 14, 19, 0.55);
}

.cockpit-step-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.35rem;
}

.cockpit-step-title strong {
  font-size: 0.98rem;
}

.mini-num {
  display: grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(180deg, #4d93ff, #2f74e8);
  flex: 0 0 auto;
}

.shot {
  margin: 0.75rem 0 0;
  padding: 0;
}

.shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0a0e13;
}

.shot figcaption {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.badge.github-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  color: var(--text);
  border-color: rgba(91, 157, 255, 0.35);
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.badge.github-badge:hover {
  color: #fff;
  border-color: rgba(91, 157, 255, 0.65);
  background: rgba(91, 157, 255, 0.14);
}

.github-icon {
  display: block;
}

.muted-block {
  margin-top: 0.5rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(18, 24, 32, 0.45);
}

.muted-block h2 {
  margin: 0 0 0.45rem;
  font-size: 0.98rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.footer {
  margin-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .app {
    padding-top: 1.25rem;
  }

  .step-nav {
    grid-template-columns: 1fr 1fr;
  }

  .step-nav-item {
    font-size: 0.78rem;
  }

  .row.options {
    flex-direction: column;
    align-items: flex-start;
  }
}