:root {
  --primary: #00a0ff;
  --primary-dark: #00629f;
  --on-primary: #ffffff;
  --background: #f9f9f9;
  --on-background: #1b1b1b;
  --surface: #ffffff;
  --surface-container: #f5f5f7;
  --surface-container-low: #f3f3f3;
  --on-surface-variant: #3f4852;
  --outline-variant: #dadada;
  --sidebar-width: 260px;

  --font: "Bricolage Grotesque", system-ui, sans-serif;
  --row-gap: 48px;
  --gutter: 24px;
  --margin-desktop: 64px;
  --margin-mobile: 20px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--background);
  color: var(--on-background);
}

a { color: inherit; text-decoration: none; }

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--outline-variant);
  padding: var(--margin-desktop) 24px;
  display: flex;
  flex-direction: column;
  z-index: 50;
}

.sidebar .brand h1 {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
}

.sidebar .brand p {
  margin: 4px 0 40px;
  color: var(--on-surface-variant);
  font-size: 14px;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 6px;
  color: var(--on-surface-variant);
  font-size: 15px;
  transition: transform 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.sidebar nav a:hover {
  color: var(--primary-dark);
  transform: translateX(4px);
}

.sidebar nav a.active {
  color: var(--primary-dark);
  background: var(--surface-container-low);
  font-weight: 700;
  border-right: 3px solid var(--primary);
}

.sidebar-toggle {
  display: none;
}

/* Main */
main {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 24px var(--margin-desktop);
}

.btn {
  height: 52px;
  padding: 0 32px;
  border-radius: 6px;
  border: none;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover { transform: scale(1.03); }

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

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

.btn-outline {
  background: transparent;
  color: var(--on-background);
  border: 1px solid var(--on-background);
}

/* Hero */
.hero {
  position: relative;
  padding: 40px var(--margin-desktop) 96px;
  overflow: hidden;
}

.hero-eyebrow {
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 12px;
}

.hero h2 {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 20px;
  max-width: 700px;
}

.hero p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  max-width: 560px;
  margin: 0 0 32px;
}

.hero .actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Rows / shelves */
.shelf {
  padding: var(--row-gap) var(--margin-desktop);
}

.shelf h3 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}

.row {
  display: flex;
  gap: var(--gutter);
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.row::-webkit-scrollbar { display: none; }

.card {
  flex: 0 0 240px;
  background: var(--surface);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(0,0,0,0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: scale(1.04);
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.card-media {
  width: 100%;
  aspect-ratio: 2 / 3;
  background: var(--surface-container-low);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-surface-variant);
  font-size: 13px;
  overflow: hidden;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body { padding: 20px; }

.card-tag {
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 6px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
}

.card-desc {
  font-size: 14px;
  color: var(--on-surface-variant);
  margin: 0 0 10px;
  line-height: 1.5;
}

.card-status {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--on-surface-variant);
}

.card-add {
  flex: 0 0 240px;
  aspect-ratio: 2 / 3;
  border: 1px dashed var(--outline-variant);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--on-surface-variant);
  background: var(--surface-container-low);
}

footer {
  padding: 48px var(--margin-desktop);
  color: var(--on-surface-variant);
  font-size: 14px;
  border-top: 1px solid var(--outline-variant);
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 0 0 32px rgba(0,0,0,0.15);
  }
  .sidebar.open { transform: translateX(0); }
  main { margin-left: 0; }
  .sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 6px;
    border: 1px solid var(--outline-variant);
    background: var(--surface);
    cursor: pointer;
    font-size: 20px;
  }
  .topbar { justify-content: space-between; padding: 20px var(--margin-mobile); }
  .hero, .shelf { padding-left: var(--margin-mobile); padding-right: var(--margin-mobile); }
  .hero h2 { font-size: 36px; }
}