/* landing.css — Rhizomium Landing Page */

:root {
  --bg: #0E0E0E;
  --fg: #EAE7E4;
  --accent: #A3532E; /* نارنجی از لوگو */
  --accent-hover: #C5643A;
  --font-main: "Inter", "Helvetica Neue", Arial, sans-serif;
}

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-main);
  overflow-y: auto;
  scroll-snap-type: y mandatory;
}

main {
  height: 100%;
}

section {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  text-align: center;
  scroll-snap-align: start;
  padding: 4vh 2vw;
}

#hero {
  flex-direction: column;
  gap: 2rem;
}

.logo {
  width: clamp(140px, 22vw, 260px);
  height: auto;
  filter: brightness(0.92) saturate(1.1);
  user-select: none;
}

.tagline {
  font-size: clamp(1.3rem, 2.5vw, 2.8rem);
  letter-spacing: 0.02em;
  margin: 0.5rem 0 1.8rem;
  font-weight: 400;
}

.buttons {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  text-decoration: none;
  padding: 0.9rem 1.4rem;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.25s ease;
}

.btn.primary {
  background: var(--accent);
  color: var(--bg);
}

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

.btn.ghost {
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn.ghost:hover {
  border-color: var(--accent-hover);
  color: var(--accent-hover);
}

#about h2, #features h2 {
  margin-bottom: 1.2rem;
  font-size: 1.6rem;
  font-weight: 600;
}

#about p {
  max-width: 600px;
  font-size: 1.1rem;
  line-height: 1.6;
}

#features {
  display: grid;
  place-items: center;
}

.feature {
  font-size: 1.2rem;
  margin: 0.8rem 0;
  opacity: 0.85;
}

#footer {
  font-size: 0.9rem;
  opacity: 0.6;
}

#footer a {
  color: var(--accent);
  text-decoration: none;
}

#footer a:hover {
  color: var(--accent-hover);
}
/* --- smooth scroll and fade effects --- */
html {
  scroll-behavior: smooth;
}

section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

section.visible {
  opacity: 1;
  transform: none;
}