/* =========================================================
   Ubuntu Terminal Cheatsheet — заглушка
   Только HTML + CSS, без скриптов и внешних зависимостей
   ========================================================= */

:root {
  --bg:            #1b1220;
  --bg-deep:       #150d19;
  --surface:       rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border:        rgba(255, 255, 255, 0.09);
  --border-hover:  rgba(233, 84, 32, 0.45);

  --text:          #ede7f1;
  --text-dim:      #b3a7bd;
  --text-mute:     #8c8095;

  --accent:        #e95420;  /* фирменный оранжевый Ubuntu */
  --accent-soft:   #ff8353;
  --aubergine:     #77216f;
  --green:         #7ddba3;
  --yellow:        #f0c674;
  --red:           #ff6b5e;

  --mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "SFMono-Regular",
          Consolas, "Liberation Mono", Menlo, monospace;
  --sans: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --radius: 14px;
  --wrap: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Мягкое свечение на фоне ------------------------------------------------ */
.glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60rem 40rem at 12% -10%, rgba(233, 84, 32, 0.20), transparent 60%),
    radial-gradient(50rem 36rem at 88% 4%,  rgba(119, 33, 111, 0.32), transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 70%);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================== HERO ===================== */
.hero {
  padding: 84px 0 56px;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.accent {
  background: linear-gradient(100deg, var(--accent) 10%, var(--accent-soft) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 640px;
  margin: 18px auto 0;
  color: var(--text-dim);
  font-size: 1.06rem;
}

/* ===================== Окно терминала ===================== */
.terminal {
  max-width: 720px;
  margin: 44px auto 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(12, 7, 15, 0.72);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  text-align: left;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}
.dot--red    { background: var(--red); }
.dot--yellow { background: var(--yellow); }
.dot--green  { background: var(--green); }

.terminal__title {
  margin-left: auto;
  color: var(--text-mute);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.terminal__body {
  margin: 0;
  padding: 20px 22px 24px;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.85;
  overflow-x: auto;
}

.prompt { color: var(--green); }
.out    { color: var(--text-mute); }
.cm     { color: #7a6f83; }

.cursor {
  color: var(--accent-soft);
  animation: blink 1.15s steps(2, start) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* ===================== Секции ===================== */
.section { padding: 46px 0 10px; }

.section__title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 26px;
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

.num {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  padding: 4px 10px;
  border: 1px solid rgba(233, 84, 32, 0.35);
  border-radius: 8px;
  background: rgba(233, 84, 32, 0.09);
}

/* ===================== Карточки ===================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 18px;
}

.card {
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
  transform: translateY(-3px);
}

.card__cmd {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--accent-soft);
}

.card__desc {
  margin: 8px 0 16px;
  color: var(--text-dim);
  font-size: 0.93rem;
}

.snippet {
  margin: auto 0 0;
  padding: 15px 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.32);
  font-family: var(--mono);
  font-size: 0.83rem;
  line-height: 1.8;
  color: #d8ccdf;
  overflow-x: auto;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.card__desc code,
.footer__note code {
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
}

.warn {
  margin: 14px 0 0;
  padding: 10px 13px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: rgba(233, 84, 32, 0.10);
  color: #f3d9cd;
  font-size: 0.86rem;
}

.warn code {
  background: rgba(0, 0, 0, 0.28);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ===================== Подвал ===================== */
.footer {
  margin-top: 70px;
  padding: 52px 0 60px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
  text-align: center;
}

.footer__title {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 600;
}

.footer__note {
  max-width: 560px;
  margin: 10px auto 0;
  color: var(--text-dim);
  font-size: 0.94rem;
}

.footer__copy {
  margin: 26px 0 0;
  color: var(--text-mute);
  font-size: 0.83rem;
}

/* ===================== Скроллбары ===================== */
.snippet::-webkit-scrollbar,
.terminal__body::-webkit-scrollbar { height: 7px; }

.snippet::-webkit-scrollbar-thumb,
.terminal__body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 4px;
}

/* ===================== Адаптив ===================== */
@media (max-width: 640px) {
  .hero { padding: 56px 0 36px; }
  .wrap { padding: 0 18px; }
  .grid { grid-template-columns: 1fr; }
  .card { padding: 20px 18px; }
  .terminal__body { font-size: 0.78rem; }
  .snippet { font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}