:root {
  --bg-top: #0b0b10;
  --bg-bottom: #2a0600;
  --card: #1a1015;
  --card-border: rgba(255, 255, 255, 0.06);
  --ink: #f9f3ff;
  --muted: #c2b5cf;
  --lava-main: #ff6a00;
  --lava-soft: #ffb347;
  --lava-deep: #b31400;
  --accent: #ffd166;
  --shadow: 0 14px 35px rgba(0, 0, 0, 0.65);
}

/* RESET BASIC */
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

body.lava-bg {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial,
    "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 0%, rgba(255,120,0,0.45), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(255,60,0,0.4), transparent 60%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

/* HERO */
.hero {
  text-align: center;
  padding: 32px 16px 18px;
  position: relative;
  overflow: hidden;
}

.lava-hero::before,
.lava-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -40px;
  height: 90px;
  background:
    radial-gradient(circle at 10% 0%, rgba(255,255,255,0.15), transparent 60%),
    repeating-linear-gradient(
      -45deg,
      rgba(255,106,0,0.9) 0px,
      rgba(255,106,0,0.9) 6px,
      rgba(179,20,0,0.95) 6px,
      rgba(179,20,0,0.95) 12px
    );
  opacity: 0.45;
  filter: blur(2px);
  pointer-events: none;
}

.logo {
  font-size: 44px;
  line-height: 1;
  text-shadow: 0 0 18px rgba(0,0,0,0.7);
}

.title {
  margin: 8px 0 4px;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: 1.4px;
  font-weight: 900;
  color: #fff5f0;
  text-shadow:
    2px 2px 0 #2b0300,
    -2px 2px 0 #2b0300,
    2px -2px 0 #2b0300,
    -2px -2px 0 #2b0300,
    0 0 20px rgba(255,90,0,0.7);
}

.subtitle {
  margin: 0;
  color: var(--lava-soft);
  font-weight: 700;
  letter-spacing: 0.6px;
}

/* LANGUAGE SWITCHER */
.lang-nav {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  padding: 10px 0 18px;
}

.lang-nav a {
  color: #fff3e0;
  text-decoration: none;
  font-weight: 700;
  background: rgba(255,106,0,0.12);
  border: 1px solid rgba(255,179,71,0.7);
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
  transition: background 0.15s ease-out, transform 0.1s ease-out;
}

.lang-nav a:hover {
  background: rgba(255,106,0,0.28);
  transform: translateY(-1px);
}

.lang-nav span {
  color: rgba(255,224,178,0.7);
}

/* LAYOUT */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px 42px;
}

/* CARDS */
.card {
  background: var(--card);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 18px 18px 10px;
  margin: 14px 0;
  border: 1px solid var(--card-border);
  position: relative;
  overflow: hidden;
}

.card-lava::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      135deg,
      rgba(255,106,0,0.12),
      transparent 40%,
      transparent 60%,
      rgba(255,179,71,0.12)
    );
  mix-blend-mode: screen;
  opacity: 0.65;
  pointer-events: none;
}

/* HEADINGS & TEXT */
h2 {
  margin: 6px 0 10px;
  font-size: clamp(20px, 3.2vw, 26px);
  color: var(--accent);
}

h3 {
  margin: 18px 0 8px;
  color: var(--lava-soft);
}

p {
  color: var(--ink);
  line-height: 1.6;
}

ul {
  margin: 6px 0 12px 20px;
  line-height: 1.6;
}

a {
  color: #ffd166;
}

a:hover {
  color: #ffe9a6;
}

/* META INFO LIST */
.meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.meta strong { color: var(--accent); }

.meta .editable {
  background: rgba(255,179,71,0.08);
  padding: 0 6px;
  border-radius: 6px;
  border: 1px solid rgba(255,179,71,0.35);
}

/* CODE STYLE */
code {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;
  font-size: 0.95em;
  color: #ffe6b3;
}

/* FOOTER */
.footer-note {
  text-align: center;
}

.footer-note p {
  color: var(--muted);
  font-size: 14px;
}

/* RESPONSIVE */
@media (min-width: 640px) {
  .meta {
    grid-template-columns: 1fr 1fr;
  }
}