/* ============================================================
   portal-system.css — ZED Portal Unified Design System
   v2.0 | 2026-03-23
   ============================================================ */

/* ── 1. TOKENS (CSS Variables) ─────────────────────────── */
:root {
  --background:    #ffffff;
  --foreground:    #09090b;
  --muted:         #71717a;
  --border:        #e4e4e7;
  --surface:       #fafafa;
  --surface-hover: #f4f4f5;
  --accent:        #3b82f6;   /* Modular Z Blue */
  --accent-dim:    rgba(59,130,246,0.1);
  --tk-accent:     #b45309;   /* Thinkers Amber */
  --tk-accent-bg:  #fffbeb;
  --radius:        1rem;
  --radius-sm:     0.5rem;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:     0 4px 16px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background:    #09090b;
    --foreground:    #fafafa;
    --muted:         #a1a1aa;
    --border:        #27272a;
    --surface:       #18181b;
    --surface-hover: #27272a;
    --accent-dim:    rgba(59,130,246,0.15);
  }
}

/* ── 2. BASE RESET ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ── 3. PORTAL NAV ─────────────────────────────────────── */
.portal-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  border-bottom: 1px solid var(--border);
  background-color: color-mix(in srgb, var(--background) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.portal-nav--minimal {
  height: 48px;
  background-color: transparent;
  border-bottom: none;
  backdrop-filter: none;
  position: relative;
}

.portal-nav-container {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--foreground);
  transition: opacity 0.2s ease;
}
.logo-group:hover { opacity: 0.7; }

.logo-img {
  width: 22px;
  height: 22px;
  object-fit: contain;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  flex-shrink: 0;
}
.logo-group:hover .logo-img { transform: scale(1.15); }

.logo-text {
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--foreground);
  white-space: nowrap;
}

.badge {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 3px 10px;
  font-size: 9px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  white-space: nowrap;
}

/* ── 4. PAGE LAYOUTS ────────────────────────────────────── */

/* Portal-style: centered, reading width */
.hub-focused-container {
  max-width: 42rem;
  margin: 3.5rem auto;
  padding: 0 1.5rem;
}

/* Full-bleed: for immersive app pages */
.hub-fullscreen-container {
  width: 100%;
  min-height: calc(100vh - 64px);
  padding: 0;
  overflow: hidden;
}

/* ── 5. SECTION HEADER ──────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.25rem;
}
.section-header > span {
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
  white-space: nowrap;
}
.section-line {
  flex: 1;
  height: 1px;
  background-color: var(--border);
}

/* ── 6. APP TILES ───────────────────────────────────────── */
.tiles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.625rem;
}
@media (min-width: 1024px) {
  .tiles-grid { grid-template-columns: repeat(3, 1fr); }
}

.app-tile {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.125rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: border-color 0.25s, transform 0.25s cubic-bezier(0.4,0,0.2,1), box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}
.app-tile:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background-color: var(--surface-hover);
}

.active-dot {
  position: absolute;
  top: 0.875rem;
  right: 0.875rem;
  width: 6px;
  height: 6px;
  background-color: #10b981;
  border-radius: 9999px;
  box-shadow: 0 0 8px rgba(16,185,129,0.5);
}

.icon-circle {
  width: 2.75rem;
  height: 2.75rem;
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1), border-color 0.25s;
  flex-shrink: 0;
}
.app-tile:hover .icon-circle {
  transform: scale(1.1);
  border-color: var(--accent);
}

.app-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--foreground);
}
.app-desc {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.5;
  margin-top: 2px;
}

/* ── 7. FOOTER ──────────────────────────────────────────── */
.portal-footer {
  margin-top: 5rem;
  text-align: center;
  padding-bottom: 3rem;
}
.portal-footer p {
  font-size: 9px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3em;
  opacity: 0.5;
}

/* ── 8. BREADCRUMB ──────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  opacity: 0.45;
}
.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--foreground); }