/* ==========================================================================
   LAYOUT.CSS — Apex Nexus / Nova Bastion UI
   Navigation, page grid, footer, responsive breakpoints.
   ========================================================================== */

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(11,15,23,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  gap: 1rem;
}

.nav__brand {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  flex-shrink: 0;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: .35rem;
  color: var(--text-bright);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .08em;
}
.nav__logo:hover { color: var(--accent); }

.nav__logo-icon {
  color: var(--accent);
  font-size: 1.1rem;
}

.nav__subtitle {
  font-size: .65rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .12em;
}

.nav__menu {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav__links {
  display: flex;
  list-style: none;
  gap: .25rem;
}

.nav__link {
  display: inline-block;
  padding: .4rem .85rem;
  font-size: .85rem;
  color: var(--muted);
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__link:hover {
  color: var(--text-bright);
  background: rgba(255,255,255,.05);
}
.nav__link--active {
  color: var(--accent);
  background: var(--accent-dim);
}
.nav__link--disabled {
  opacity: .4;
  cursor: default;
  pointer-events: none;
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

.nav__theme-badge {
  font-size: .7rem;
  padding: .15rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  user-select: none;
}

.nav__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  border: 1px solid var(--accent);
  cursor: pointer;
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1010;
}
.nav__toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav__toggle.is-open .nav__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav__toggle.is-open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav__toggle.is-open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Main ---------- */
.main {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
  min-height: calc(100vh - var(--nav-h) - 56px);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  padding: .75rem 1.25rem;
  font-size: .75rem;
  color: var(--muted);
}
.footer__inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}
.footer__brand { color: var(--accent); font-weight: 600; letter-spacing: .05em; }
.footer__sep   { opacity: .3; }
.footer__link  { color: var(--muted); }
.footer__link:hover { color: var(--accent); }

/* ---------- Dashboard Grid ---------- */
.dashboard {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.dashboard__row {
  display: grid;
  gap: 1.25rem;
}

.dashboard__row--top {
  grid-template-columns: 2fr 1fr;
}
.dashboard__row--mid {
  grid-template-columns: 1fr 1fr;
}
.dashboard__row--bottom {
  grid-template-columns: 1fr;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 5rem 1.25rem 4rem;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, var(--accent-dim), transparent 70%),
    radial-gradient(ellipse 40% 60% at 70% 60%, var(--accent2-dim), transparent 70%);
  opacity: .45;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: .04em;
  margin-bottom: .75rem;
  line-height: 1.1;
}
.hero__title-accent {
  color: var(--accent);
  margin-right: .25rem;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 2rem;
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------- Features Grid ---------- */
.features {
  padding: 3rem 0;
}
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ---------- Status Strip ---------- */
.status-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.status-strip__inner {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}
.status-strip__item {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.status-strip__label {
  font-size: .75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.status-strip__value {
  font-size: .8rem;
  font-weight: 600;
  font-family: var(--font-mono);
}
.status-strip__value--ok   { color: var(--ok); }
.status-strip__value--warn { color: var(--warn); }
.status-strip__value--muted{ color: var(--muted); }

/* ---------- What's New ---------- */
.whats-new {
  padding: 2.5rem 0 1rem;
}
.section-title {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border);
}
.whats-new__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .65rem;
}
.whats-new__item {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  font-size: .88rem;
}
.whats-new__date {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
  flex-shrink: 0;
}

/* ---------- Flash messages ---------- */
.flash-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: .75rem 2rem 0;
}
.flash {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .65rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: .5rem;
  font-size: .88rem;
  animation: flash-in .3s var(--ease);
}
.flash--success { background: var(--ok-dim); color: var(--ok); border-left: 3px solid var(--ok); }
.flash--error   { background: var(--danger-dim); color: var(--danger); border-left: 3px solid var(--danger); }
.flash--warning { background: var(--warn-dim); color: var(--warn); border-left: 3px solid var(--warn); }
.flash--info    { background: var(--accent-dim); color: var(--accent); border-left: 3px solid var(--accent); }
.flash__close {
  background: none;
  border: none;
  color: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 .25rem;
  opacity: .7;
}
.flash__close:hover { opacity: 1; }

@keyframes flash-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Tablet */
@media (max-width: 1024px) {
  .dashboard__row--top {
    grid-template-columns: 1fr 1fr;
  }
  .features__grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero__title { font-size: 2.5rem; }
}

/* Mobile */
@media (max-width: 768px) {
  /* Nav collapses */
  .nav__toggle {
    display: flex;
  }
  .nav__menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .25s var(--ease), opacity .25s var(--ease);
    z-index: 999;
  }
  .nav__menu.is-open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav__links {
    flex-direction: column;
    gap: .5rem;
  }
  .nav__link {
    display: block;
    padding: .6rem .75rem;
  }
  .nav__controls {
    display: none; /* hide on mobile; avatar visible in future iteration */
  }

  /* Tighten padding on mobile */
  .main {
    padding: 1rem 1rem 2rem;
  }
  .nav__inner {
    padding: 0 1rem;
  }

  /* Dashboard: single column */
  .dashboard__row--top,
  .dashboard__row--mid {
    grid-template-columns: 1fr;
  }

  /* Features: single column */
  .features__grid {
    grid-template-columns: 1fr;
  }

  /* Hero */
  .hero {
    padding: 3rem 1rem 2.5rem;
  }
  .hero__title { font-size: 2rem; }
  .hero__subtitle { font-size: 1rem; }

  /* Tables: horizontal scroll */
  .panel__body--scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .table { min-width: 360px; }

  .hide-mobile { display: none !important; }

  /* Status strip */
  .status-strip__inner { gap: 1.5rem; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 1.65rem; }
  .hero__actions { flex-direction: column; align-items: center; }
  .status-strip__inner { flex-direction: column; align-items: center; gap: .75rem; }
}