/* ============================================================
   Quantum Whale Portal — Layout: Header, Footer, Containers
   ============================================================ */

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container-sm { max-width: 760px; }
.container-md { max-width: 960px; }
.container-lg { max-width: 1400px; }

/* ── Portal Header ── */
.portal-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--bg-header);
  padding: 0 var(--space-6);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 16px rgba(0,0,0,0.18);
}

.portal-header .header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.portal-header .header-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255,255,255,0.3);
  flex-shrink: 0;
}

.portal-header .header-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.portal-header .brand-name {
  color: #ffffff;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.01em;
}

.portal-header .brand-tagline {
  color: rgba(255,255,255,0.75);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
}

.portal-header .header-title {
  color: rgba(255,255,255,0.9);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 14px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--border-radius-full);
  border: 1px solid rgba(255,255,255,0.2);
}

.portal-header .header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-nav-link {
  color: rgba(255,255,255,0.85);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}
.header-nav-link:hover {
  color: #ffffff;
  background: rgba(255,255,255,0.12);
}

/* ── Portal Footer ── */
.portal-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: var(--space-6) var(--space-6);
  font-size: var(--font-size-sm);
  margin-top: auto;
}

.portal-footer a {
  color: var(--color-accent);
  text-decoration: none;
}
.portal-footer a:hover { color: var(--color-sky); }

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

.page-content {
  flex: 1;
}

/* ── Hero Section ── */
.page-hero {
  background: var(--bg-hero);
  padding: var(--space-16) var(--space-6) var(--space-12);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 20% 50%, rgba(113,192,255,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 500px 300px at 80% 30%, rgba(26,176,214,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero .hero-content { position: relative; z-index: 1; }
.page-hero h1 { color: #ffffff; margin-bottom: var(--space-4); }
.page-hero p  { color: rgba(255,255,255,0.80); font-size: var(--font-size-lg); max-width: 560px; margin: 0 auto; }

/* ── Section Spacing ── */
.section { padding: var(--space-12) 0; }
.section-sm { padding: var(--space-8) 0; }
.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

/* ── Admin Layout ── */
.admin-layout {
  display: flex;
  min-height: calc(100vh - 64px);
}

.admin-sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  padding: var(--space-6) 0;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}

.admin-main {
  flex: 1;
  overflow: hidden;
  padding: var(--space-8) var(--space-8);
  min-width: 0;
}

.sidebar-nav { list-style: none; }

.sidebar-nav-item a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav-item a:hover {
  color: var(--color-primary);
  background: var(--bg-muted);
  border-left-color: var(--color-accent);
}

.sidebar-nav-item a.active {
  color: var(--color-primary);
  background: var(--bg-muted);
  border-left-color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.sidebar-nav-item a .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar-section-label {
  padding: var(--space-5) var(--space-6) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── Page Title Bar ── */
.page-title-bar {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.page-title-bar h1 {
  font-size: var(--font-size-2xl);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.page-title-bar p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin: 0;
}

/* ── Grid Layouts ── */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .admin-sidebar { width: 200px; }
  .admin-main    { padding: var(--space-6); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-3) 0;
  }
  .admin-main { padding: var(--space-4); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .sidebar-nav { display: flex; flex-wrap: wrap; padding: 0 var(--space-4); gap: var(--space-2); }
  .sidebar-nav-item a {
    padding: var(--space-2) var(--space-3);
    border-left: none;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
  }
  .sidebar-nav-item a.active { border-color: var(--color-primary); }
  .sidebar-section-label { display: none; }
  .container { padding: 0 var(--space-4); }
  .portal-header { padding: 0 var(--space-4); }
  .portal-header .brand-tagline { display: none; }
  .portal-header .header-title { display: none; }
}