/* ============================================================
   HUVI — Layout
   Sidebar, Header, Bottom Nav, Grid
   ============================================================ */

/* ============================================================
   AUTH SCREEN
   ============================================================ */
.auth-screen {
  align-items: center;
  justify-content: center;
  background: var(--surface-0);
  background-image: var(--gradient-glow);
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: var(--space-8);
  animation: slideUp var(--transition-slow) ease-out;
}

.auth-brand {
  text-align: center;
  margin-bottom: var(--space-10);
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.logo-icon {
  font-size: 2.5rem;
  filter: drop-shadow(0 0 12px rgba(244, 112, 1, 0.35));
}

.logo-text {
  font-size: var(--font-4xl);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.auth-tagline {
  color: var(--text-muted);
  font-size: var(--font-sm);
  font-weight: 400;
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
  animation: fadeIn var(--transition-normal) ease-out;
}

.auth-title {
  font-size: var(--font-xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: var(--font-sm);
  margin-bottom: var(--space-6);
}

.auth-links {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-5);
}

.auth-link {
  background: none;
  border: none;
  color: var(--primary-400);
  font-family: var(--font-family);
  font-size: var(--font-sm);
  cursor: pointer;
  transition: color var(--transition-fast);
  padding: 0;
}

.auth-link:hover {
  color: var(--primary-300);
}

/* ============================================================
   APP SCREEN
   ============================================================ */
.app-screen {
  flex-direction: row;
  min-height: 100vh;
  min-height: 100dvh;
}

/* ============================================================
   SIDEBAR (Desktop)
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  height: 100dvh;
  position: fixed;
  top: 0;
  left: 0;
  background: var(--surface-0);
  border-right: 1px solid var(--surface-300);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--surface-300);
}

.logo-icon-sm {
  font-size: 1.5rem;
  filter: drop-shadow(0 0 8px rgba(244, 112, 1, 0.3));
}

.sidebar-brand-text {
  font-size: var(--font-xl);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-base);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-family);
  width: 100%;
  text-align: left;
  position: relative;
}

.nav-item:hover {
  background: var(--surface-300);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(244, 112, 1, 0.08);
  color: var(--primary-500);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 25%;
  bottom: 25%;
  width: 4px;
  background: var(--primary-500);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: 0 0 8px var(--primary-400);
}

.nav-icon {
  font-size: var(--font-lg);
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.nav-label {
  white-space: nowrap;
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--surface-300);
}

.nav-logout {
  color: var(--text-muted);
}

.nav-logout:hover {
  color: var(--error-400);
  background: rgba(255, 107, 107, 0.08);
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.main-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--surface-300);
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.page-title {
  font-size: var(--font-lg);
  font-weight: 700;
  flex: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.user-name {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

/* ============================================================
   PAGES CONTAINER
   ============================================================ */
.pages-container {
  flex: 1;
  padding: var(--space-6);
  overflow-y: auto;
}

.page {
  display: none;
}

.page.active {
  display: block;
  animation: fadeIn var(--transition-normal) ease-out;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-title {
  font-size: var(--font-xl);
  font-weight: 700;
}

/* ============================================================
   GRIDS
   ============================================================ */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.chart-wide {
  grid-column: 1 / -1;
}

/* ============================================================
   BOTTOM NAV (Mobile)
   ============================================================ */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: rgba(255, 255, 255, 0.85);
  border-top: 1px solid var(--surface-300);
  z-index: 100;
  padding: 0;
  justify-content: space-around;
  align-items: center;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.bnav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--font-xs);
  font-weight: 500;
  transition: color var(--transition-fast);
  min-width: 56px;
}

.bnav-item.active {
  color: var(--primary-400);
}

.bnav-icon {
  font-size: var(--font-lg);
}

.bnav-label {
  font-size: 10px;
  letter-spacing: 0.2px;
}

/* ============================================================
   RESPONSIVE — Mobile First
   ============================================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .main-content {
    margin-left: 0;
    padding-bottom: var(--bottom-nav-height);
  }

  .menu-toggle {
    display: flex;
  }

  .bottom-nav {
    display: flex;
  }

  .pages-container {
    padding: var(--space-4);
  }

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

  .kpi-card {
    padding: var(--space-4);
  }

  .kpi-value {
    font-size: var(--font-xl);
  }

  .kpi-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-lg);
  }

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

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-group {
    width: 100%;
  }

  .filter-group .form-select,
  .filter-group .form-input {
    flex: 1;
    min-width: 0;
  }

  .auth-container {
    padding: var(--space-6);
  }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Large Desktop */
@media (min-width: 1400px) {
  .kpi-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}