/* ---------- Theme Colors ---------- */
:root {
  --color-background: white;
  --color-on-background: black;
  --color-background-hover: #eee;
  --color-on-background-hover: black;
  --color-primary: #DB830F;
  --color-on-primary: white;
  --color-error: #de0000;
  --color-on-error: white;
}

main.dark,
header.dark {
  color-scheme: dark;
  --color-background: #1c1b1f;
  --color-on-background: white;
  --color-background-hover: #27262c;
  --color-on-background-hover: white;
  --color-primary: #432805;
  --color-primary-disabled: #A66819;
  --color-on-primary: white;
  --color-error: #de0000;
  --color-on-error: white;
}

/* ---------- Global layout ---------- */
html,
body {
  height: 100%;
  overflow: hidden; /* ✅ Prevent full-page scrolling */
}

body {
  display: flex;
  flex-direction: column;
  margin: 0;
}

header,
main {
  background-color: var(--color-background);
  color: var(--color-on-background);
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) minmax(16rem, 2fr) minmax(16rem, 1fr);
  column-gap: 2rem;
}

header {
  display: flex;
  padding-inline: calc(25vw - 10rem);
  height: 4rem;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

@media screen and (min-width: 1366px) {
  header {
    display: grid;
    padding-inline: 0;
  }
}

header .logo {
  justify-self: end;
  align-self: center;
  display: flex;
  align-items: flex-end;
  gap: 1rem;
}

header .nav {
  flex: 1;
}

main {
  height: 0;
  flex: 1;
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  column-gap: 2rem;
}

main > div {
  overflow-y: auto;
}

/* ---------- Packs Page ---------- */
.page-packs-container,
main.page-packs {
  position: relative;
  z-index: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start; /* ✅ start instead of center for horizontal layout */
  padding: 40px 40px; /* slightly higher */
  box-sizing: border-box;
  background-color: var(--color-background);
  color: var(--color-on-background);
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  overflow-x: auto; /* ✅ horizontal scroll enabled */
  overflow-y: hidden; /* disable vertical scroll inside packs container */
  height: 100%;
  width: 100%;
  transition: background-color 0.25s ease, color 0.25s ease;
  scroll-behavior: smooth; /* smooth horizontal scrolling */
}

/* ---------- Packs Row ---------- */
.packs-wrapper,
.packs-container {
  display: flex;
  flex-wrap: nowrap; /* ✅ prevent wrapping to next row */
  justify-content: flex-start; /* align to start */
  align-items: flex-start;
  gap: 32px;
  margin-top: 40px;
  z-index: 1;
  width: max-content; /* ✅ ensures horizontal scrolling works */
  padding-bottom: 20px; /* room for scrollbar */
}

/* ---------- Pack Card ---------- */
.pack,
.pack-card {
  background: var(--color-background-hover);
  border-radius: 0.75rem;
  padding: 28px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 360px;
  box-sizing: border-box;
  flex-shrink: 0; /* ✅ prevent packs from shrinking when too many */
  overflow: visible;
}

.pack:hover,
.pack-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  background: var(--color-background-hover);
  color: var(--color-on-background-hover);
}

/* ---------- Pack Title ---------- */
.pack > h2,
.pack-card > h2,
.pack-title {
  margin: 0 0 16px;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-on-background);
  text-align: center;
}

/* ---------- Levels List ---------- */
.pack-levels,
.level-list,
.pack ul {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}

/* ---------- Level Item ---------- */
.pack-levels li,
.level-item,
.pack li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  margin: 22px 0;
  width: 100%;
  background: var(--color-background);
  border-radius: 0.5rem;
  padding: 20px;
  transition: background 0.2s ease;
}

.pack-levels li:hover,
.level-item:hover {
  background: var(--color-background-hover);
}

/* ---------- Level Name ---------- */
.pack-levels a,
.level-name,
.pack a {
  display: inline-block;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-on-background);
  text-decoration: none;
  text-align: center;
  word-break: break-word;
  transition: color 0.2s ease;
}

.pack-levels a:hover,
.pack a:hover {
  text-decoration: underline;
  color: var(--color-primary);
}

/* ---------- Video ---------- */
.pack iframe,
.pack-video,
.pack-levels iframe,
.level-video {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  border-radius: 0.75rem;
  border: none;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  margin: 0 auto;
}

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
  .pack,
  .pack-card {
    width: 320px;
  }
}

@media (max-width: 900px) {
  .page-packs-container,
  main.page-packs {
    align-items: flex-start;
    padding: 30px 20px;
  }

  .packs-wrapper,
  .packs-container {
    gap: 24px;
  }

  .pack,
  .pack-card {
    width: 300px;
  }
}

/* ---------- Utility Elements ---------- */
.spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  grid-column: span 3;
}

input[type="checkbox"] {
  height: 1.25rem;
  width: 1.25rem;
  cursor: pointer;
  margin: 0;
}