/* ============================================================
   personality-test-hub, layout.css
   Grid system, responsive breakpoints, container widths
   ============================================================ */

/* ---------- Container ---------- */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* ---------- Breakpoints ---------- */
/*
  sm:  640px, mobile landscape / small tablet
  md:  768px, tablet
  lg:  1024px, laptop / small desktop
  xl:  1280px, desktop
  2xl: 1536px, wide desktop
*/

/* Mobile first: default container */
.container {
  max-width: 100%;
}

/* sm ≥ 640px */
@media (min-width: 640px) {
  .container {
    max-width: 608px;          /* 640 - 2×16px padding */
  }
}

/* md ≥ 768px */
@media (min-width: 768px) {
  .container {
    max-width: 736px;
  }
}

/* lg ≥ 1024px */
@media (min-width: 1024px) {
  .container {
    max-width: 960px;
  }
}

/* xl ≥ 1280px */
@media (min-width: 1280px) {
  .container {
    max-width: 1120px;
  }
}

/* 2xl ≥ 1536px */
@media (min-width: 1536px) {
  .container {
    max-width: 1344px;
  }
}

/* ---------- Grid System (12-column) ---------- */
.grid {
  display: grid;
  gap: var(--space-md);
}

/* Responsive column utilities */
.grid-1  { grid-template-columns: repeat(1, 1fr); }
.grid-2  { grid-template-columns: repeat(2, 1fr); }
.grid-3  { grid-template-columns: repeat(3, 1fr); }
.grid-4  { grid-template-columns: repeat(4, 1fr); }
.grid-6  { grid-template-columns: repeat(6, 1fr); }
.grid-12 { grid-template-columns: repeat(12, 1fr); }

/* Auto-fit grid (cards, etc.) */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* Responsive: stack on mobile */
@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-6,
  .grid-12 {
    grid-template-columns: 1fr;
  }
}

/* Tablet: 2 columns for 4-col grid */
@media (min-width: 768px) and (max-width: 1023px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Flexbox helpers ---------- */
.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.flex-wrap    { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start  { align-items: flex-start; }
.items-end    { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around  { justify-content: space-around; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ---------- Section spacing ---------- */
.section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

.section-sm {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

/* ---------- Page layout ---------- */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-content {
  flex: 1 0 auto;
}

.page-footer {
  flex-shrink: 0;
}

/* ---------- Full-bleed helper ---------- */
.full-bleed {
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

/* ---------- Sticky header ---------- */
.sticky-top {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background-color: rgba(15, 15, 26, 0.85);
}

/* ---------- Hide on breakpoints ---------- */
.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: initial;
  }
  .hide-desktop {
    display: none;
  }
}

/* ── Navigation Dropdown ── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__trigger {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.15s;
  font-family: inherit;
}

.nav-dropdown__trigger:hover {
  color: var(--text-primary);
}

.nav-dropdown__arrow {
  font-size: 0.6rem;
  transition: transform 0.2s;
}

.nav-dropdown:hover .nav-dropdown__arrow {
  transform: rotate(180deg);
}

.nav-dropdown__menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  background: #1a1f2e;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 0.5rem 0;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 100;
}

.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown__trigger:focus + .nav-dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown__menu a {
  display: block;
  padding: 0.6rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-dropdown__menu a:hover {
  background: rgba(88,166,255,0.08);
  color: var(--accent-primary);
}

@media (max-width: 768px) {
  .nav-dropdown__menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding-left: 1rem;
    display: none;              /* collapsed by default */
  }

  /* Expand a submenu ONLY when its own trigger is toggled open,
     not just because the burger menu is open. */
  .nav-dropdown.open .nav-dropdown__menu {
    display: block;
  }

  .nav-dropdown.open .nav-dropdown__arrow {
    transform: rotate(180deg);
  }
}