/* =========================================
   Reset & Base
   ========================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #f0f0f0;
  background-color: #000000;
}

img, video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

ul {
  list-style: none;
}

/* =========================================
   Layout
   ========================================= */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* =========================================
   Header / Nav
   ========================================= */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #000000;
  border-bottom: 1px solid #2a2a2a;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin-inline: auto;
  padding: 1rem 1.5rem;
}

nav .logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

nav ul {
  display: flex;
  gap: 2rem;
}

nav ul a {
  font-size: 0.9rem;
  font-weight: 500;
  color: #888;
  transition: color 0.2s;
}

nav ul a:hover,
nav ul a.active {
  color: #ffffff;
}

/* =========================================
   Landing – two-column layout
   ========================================= */
.landing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  min-height: calc(100vh - 61px);
  max-width: 1100px;
  margin-inline: auto;
  padding: 3rem 1.5rem;
  gap: 3rem;
}

/* Column 1 – cards */
.cards-col {
  display: flex;
  flex-direction: row;
  gap: 1.5rem;
}

.card-placeholder {
  width: 100%;
  aspect-ratio: 2 / 3;
  background-color: #111111;
  border: 1px solid #2a2a2a;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#card-front {
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
  perspective: 600px;
}

#card-front:hover {
  border-color: #555;
  transform: translateY(-2px);
}

#card-front.flip-out {
  transition: transform 0.25s ease-in;
  transform: rotateY(90deg);
}

#card-front.flip-in {
  transition: transform 0.25s ease-out;
  transform: rotateY(0deg);
}

.card-placeholder img {
  /* width: 100%;
  height: 100%; */
  object-fit: cover;
  /* border-radius: 9px; */
  display: block;
}

/* Column 2 – CTA */
.cta-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 2rem;
}

.cta-title {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #f0f0f0;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.feature-list li {
  font-size: 0.95rem;
  color: #888;
  padding-left: 1.1rem;
  position: relative;
}

.feature-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: #444;
}

/* =========================================
   Button
   ========================================= */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  background-color: #ffffff;
  color: #000000;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background-color 0.2s, transform 0.15s;
  text-decoration: none;
}

.btn:hover {
  background-color: #d4d4d4;
  transform: translateY(-1px);
}

.btn-order {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  border-radius: 8px;
}

.btn-ghost {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  border-radius: 8px;
  background-color: transparent;
  color: #f0f0f0;
  border: 1px solid #444;
}

.btn-ghost:hover {
  background-color: #1a1a1a;
  border-color: #888;
  transform: translateY(-1px);
}

.btn-row {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

/* =========================================
   Content Section
   ========================================= */
.content {
  max-width: 1100px;
  margin-inline: auto;
  padding: 5rem 1.5rem;
}

.content h1,
.content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.content p {
  color: #888;
  max-width: 680px;
}

/* =========================================
   About Grid
   ========================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
  margin-bottom: 3rem;
}

.about-card {
  background-color: #111111;
  border: 1px solid #2a2a2a;
  border-radius: 10px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s;
}

.about-card:hover {
  border-color: #555;
}

.about-card h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f0f0f0;
  margin-bottom: 0;
}

.about-card p {
  font-size: 0.9rem;
  color: #888;
  max-width: unset;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

footer {
  border-top: 1px solid #2a2a2a;
  display: flex;
  justify-content: center;
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
  color: #555;
}

footer p {
  display: flex;
  flex-direction: column; /* stack text and image vertically */
  align-items: center;    /* center both horizontally */
  margin: 0;
  gap: 0.5rem;            /* space between text and image */
}

footer img.invert {
  height: 24px;           /* adjust size as needed */
  filter: invert(1);
}


/* =========================================
   Responsive
   ========================================= */
@media (max-width: 768px) {
  .landing {
    grid-template-columns: 1fr;
    min-height: unset;
    padding-block: 3rem;
  }

  .cta-col {
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  nav ul {
    gap: 1.25rem;
  }
}

div.back-home {
  margin-top: 1rem;
}

ul.rs-list {
  margin-top: 1rem;
}