:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #111;
  --muted: #666;
  --line: #e5e5e5;
  --accent: #2563eb;
  --accent-soft: #eff4ff;
  --accent-hover: #1d4ed8;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Avenir Next", "SF Pro Display", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* ── Header ──────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  background: rgba(250, 250, 250, 0.9);
  backdrop-filter: blur(8px);
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.header nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.header nav a:hover { color: var(--text); }

/* ── Button ──────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 150ms;
}

.btn:hover { background: var(--accent-hover); }

.btn-full { width: 100%; text-align: center; }

.btn-secondary {
  background: #111;
  color: #fff;
}

.btn-danger {
  background: #b91c1c;
}

/* ── Sections ────────────────────────────────────────────── */
.section {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0;
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.section-title-row h2 {
  margin-bottom: 0.4rem;
}

.section-title-row p {
  color: var(--muted);
  max-width: 42rem;
}

.section-dark {
  background: var(--text);
  color: #fff;
  max-width: none;
  text-align: center;
}

.section-dark p { color: #aaa; margin-bottom: 1.5rem; }
.section-dark .btn { background: #fff; color: var(--text); }
.section-dark .btn:hover { background: #eee; }

.order-form {
  display: grid;
  gap: 0.9rem;
  max-width: 420px;
  margin: 0 auto;
  text-align: left;
}

.order-form label {
  display: grid;
  gap: 0.35rem;
  color: #ddd;
  font-size: 0.9rem;
  font-weight: 600;
}

.order-form input,
.order-form textarea {
  width: 100%;
  border: 1px solid #333;
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
  background: #fff;
  color: var(--text);
  font: inherit;
}

.order-form textarea {
  resize: vertical;
}

.order-form .btn {
  border: 0;
  cursor: pointer;
}

.order-status {
  min-height: 1.4rem;
  margin: 0;
  color: #aaa;
  font-size: 0.9rem;
  text-align: center;
}

.order-status.success {
  color: #86efac;
}

.order-status.error {
  color: #fca5a5;
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 1rem 0 1.5rem;
  max-width: 32rem;
}

/* ── Konfigurator ────────────────────────────────────────── */
.configurator {
  display: grid;
  gap: 2rem;
}

.config-block {
  display: grid;
  gap: 0.5rem;
}

.config-label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.95rem;
}

.config-hint {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── Choice Grids ────────────────────────────────────────── */
.os-grid,
.app-grid {
  display: grid;
  gap: 0.65rem;
}

.os-grid {
  grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
}

.app-grid {
  grid-template-columns: repeat(3, 1fr);
}

.os-card,
.app-card {
  display: flex;
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
  transition: border-color 150ms;
}

.os-card {
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 0.5rem;
  font-size: 0.8rem;
}

.app-card {
  min-height: 132px;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.45rem;
  padding: 0.95rem;
  text-align: left;
}

.app-card span:not(.app-icon) {
  font-weight: 700;
}

.app-card small {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.app-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #111;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.os-card:hover,
.app-card:hover { border-color: #bbb; }

.os-card.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.os-card.disabled:hover {
  border-color: var(--line);
}

.os-card.active,
.app-card.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.os-icon-text { font-size: 1.8rem; line-height: 1; }

/* ── Sliders ─────────────────────────────────────────────── */
.sliders {
  display: grid;
  gap: 1.5rem;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--line);
  border-radius: 999px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Summary ─────────────────────────────────────────────── */
.summary {
  background: var(--surface);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
}

.summary-line {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.summary-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.summary-specs span {
  padding: 0.3rem 0.7rem;
  background: var(--bg);
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
}

.summary-price {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.price-amount {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0;
}

.price-period {
  color: var(--muted);
  font-size: 1rem;
}

.capacity-status {
  font-size: 0.85rem;
  color: var(--muted);
}

.capacity-status.ok {
  color: #166534;
}

.capacity-status.warning {
  color: #b45309;
}

/* ── Demo Instances ──────────────────────────────────────── */
.instance-list {
  display: grid;
  gap: 0.9rem;
}

.empty-state,
.instance-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.empty-state {
  color: var(--muted);
}

.instance-card {
  display: grid;
  gap: 0.9rem;
}

.instance-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.instance-top h3 {
  font-size: 1.05rem;
}

.status-pill {
  align-self: flex-start;
  border-radius: 8px;
  padding: 0.2rem 0.55rem;
  font-size: 0.76rem;
  font-weight: 700;
  background: #eee;
}

.status-running { background: #dcfce7; color: #166534; }
.status-stopped { background: #f3f4f6; color: #374151; }
.status-failed { background: #fee2e2; color: #991b1b; }

.instance-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.instance-meta span {
  background: var(--bg);
  border-radius: 8px;
  padding: 0.25rem 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.instance-log {
  color: var(--muted);
  font-size: 0.84rem;
}

.instance-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.instance-actions button,
.instance-actions a {
  border: 0;
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  background: #111;
  color: #fff;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.instance-actions .danger {
  background: #b91c1c;
}

.instance-actions .light {
  background: #e5e7eb;
  color: #111;
}

/* ── Terminal ────────────────────────────────────────────── */
.terminal-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(0,0,0,0.55);
}

.terminal-modal.hidden {
  display: none;
}

.terminal-panel {
  width: min(980px, 100%);
  min-height: 520px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  border-radius: 12px;
  background: #080b10;
  color: #e5f3ff;
  box-shadow: 0 22px 80px rgba(0,0,0,0.35);
}

.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  background: #111827;
}

.terminal-close {
  border: 0;
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  background: #fff;
  color: #111;
  font-weight: 700;
  cursor: pointer;
}

.terminal-output {
  margin: 0;
  padding: 1rem;
  overflow: auto;
  white-space: pre-wrap;
  font: 0.9rem/1.45 "SFMono-Regular", Consolas, monospace;
}

.terminal-input-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid #1f2937;
  background: #0f172a;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.terminal-input-row input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: #fff;
  font: inherit;
}

/* ── FAQ ──────────────────────────────────────────────────── */
.faq-list {
  display: grid;
  gap: 0.5rem;
}

.faq-list details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list p {
  margin-top: 0.5rem;
  color: var(--muted);
}

/* ── Features ─────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.feature-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.5rem;
}

.feature h3 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.feature p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Infra ────────────────────────────────────────────────── */
.section-infra {
  background: #f0f0f0;
  max-width: none;
  padding: 3.5rem 1.5rem;
}

.section-infra h2 {
  max-width: 900px;
  margin: 0 auto 1.5rem;
}

.infra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  max-width: 900px;
  margin: 0 auto;
}

.infra-item {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
}

.infra-item strong {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.infra-item span {
  font-weight: 600;
  font-size: 0.95rem;
}

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a:hover { color: var(--text); }

/* ── Mobile ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .header nav { display: none; }
  .hero { padding: 4rem 1.25rem 3rem; }
  .hero h1 { font-size: 2.45rem; }
  .section { padding: 3rem 1.25rem; }
  .section-title-row { display: grid; }
  .os-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: 1fr; }
  .instance-top { display: grid; }
  .feature-grid { grid-template-columns: 1fr; }
  .infra-grid { grid-template-columns: repeat(2, 1fr); }
  .footer { flex-direction: column; gap: 1rem; text-align: center; }
}