/* ═══════════════════════════════════════════════════════════════════════
   VSHRED AI PLATFORM — LAYOUT SYSTEM
   Creative Director: Phase 0 Design Foundation

   Page-level layout: app shell, content grids, responsive behavior.
   ═══════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────
   APP SHELL
   Fixed sidebar + scrollable main content area
   ───────────────────────────────────────────────────────────────────── */

.app {
  display: flex;
  min-height: 100vh;
  overflow: hidden;
}

.app__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  overflow: hidden;
  transition: margin-left var(--transition-slow);
}

.app__content {
  flex: 1;
  padding: var(--content-padding);
  overflow-y: auto;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────────────────────────────────
   PAGE HEADER
   ───────────────────────────────────────────────────────────────────── */

.page-header {
  margin-bottom: var(--space-8);
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ─────────────────────────────────────────────────────────────────────
   GRID SYSTEMS
   ───────────────────────────────────────────────────────────────────── */

/* Metrics Row — 4 column KPI cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

/* Content Grid — Main + sidebar layout */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-5);
}

/* Full-width content */
.content-full {
  max-width: var(--content-max-width);
}

/* Two column equal */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

/* Three column */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

/* Auto-fill responsive grid */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

/* Stack — vertical flex layout with gap */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.stack--tight { gap: var(--space-3); }
.stack--loose { gap: var(--space-6); }

/* ─────────────────────────────────────────────────────────────────────
   LOGIN LAYOUT
   Centered form on dark canvas with subtle energy
   ───────────────────────────────────────────────────────────────────── */

.login-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-base);
  position: relative;
  overflow: hidden;
  padding: var(--space-4);
}

/* Ambient glow behind login */
.login-layout::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  opacity: 0.15;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: breathe-glow 6s ease-in-out infinite;
  pointer-events: none;
}

@keyframes breathe-glow {
  0%, 100% { opacity: 0.1; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.2; transform: translate(-50%, -50%) scale(1.1); }
}

.login-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-10);
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--color-border-subtle);
}

/* Fire accent line at top of login card */
.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-fire);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.login-logo {
  text-align: center;
  margin-bottom: var(--space-2);
}

.login-logo__img {
  max-width: 280px;
  height: auto;
  filter: drop-shadow(0 0 24px var(--color-primary-glow));
}

.login-logo__text {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 4px;
  text-shadow: 0 0 32px var(--color-primary-glow);
}

.login-tagline {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-display);
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  text-align: center;
  margin-bottom: var(--space-6);
  letter-spacing: var(--tracking-wide);
}

.login-footer {
  margin-top: var(--space-8);
  text-align: center;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
}

.login-footer__text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.login-footer__text strong {
  color: var(--color-text-tertiary);
  font-weight: var(--weight-semibold);
}

.login-motivation {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-6);
  font-style: italic;
  opacity: 0;
  animation: fade-in-up 0.8s ease 0.6s forwards;
}


/* ─────────────────────────────────────────────────────────────────────
   RESPONSIVE BREAKPOINTS
   Mobile: 375px  |  Tablet: 768px  |  Desktop: 1024px  |  Wide: 1440px
   ───────────────────────────────────────────────────────────────────── */

/* Tablet: 768px and below */
@media (max-width: 768px) {
  .app__main {
    margin-left: 0;
  }

  .app__content {
    padding: var(--content-padding-mobile);
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .page-title {
    font-size: var(--text-2xl);
  }

  .login-card {
    padding: var(--space-8) var(--space-6);
  }
}

/* Mobile: 480px and below */
@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .metric-card__value {
    font-size: var(--text-3xl);
  }

  .page-header {
    margin-bottom: var(--space-5);
  }

  .login-card {
    padding: var(--space-6) var(--space-5);
    border-radius: var(--radius-xl);
  }

  .login-logo__text {
    font-size: var(--text-4xl);
  }

  .login-logo__img {
    max-width: 220px;
  }
}

/* Desktop: 1024px+ — default styles */

/* Wide: 1440px+ */
@media (min-width: 1440px) {
  .content-grid {
    grid-template-columns: 1fr 400px;
  }

  .app__content {
    padding: var(--space-10);
  }
}