/* ==========================================================================
   SPMB Online — Layout (Sidebar, Navbar, Main Content Grid)
   ========================================================================== */

/* ══════════════════════════════════════════════════════════════════════════
   1. APP SHELL LAYOUT
   ══════════════════════════════════════════════════════════════════════════ */

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

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-base);
  min-width: 0;
}

.app-layout.sidebar-collapsed .app-main {
  margin-left: var(--sidebar-collapsed);
}

.app-content {
  flex: 1;
  padding: var(--space-6);
  margin-top: var(--navbar-height);
}


/* ══════════════════════════════════════════════════════════════════════════
   2. SIDEBAR
   ══════════════════════════════════════════════════════════════════════════ */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--neutral-900);
  color: var(--neutral-0);
  z-index: var(--z-fixed);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-base);
  overflow: hidden;
}

.app-layout.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed);
}

/* -- Sidebar Header (Logo) -- */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: var(--navbar-height);
  flex-shrink: 0;
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  font-weight: var(--fw-extrabold);
  color: var(--neutral-0);
  flex-shrink: 0;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
  min-width: 0;
  opacity: 1;
  transition: opacity var(--transition-fast);
}

.app-layout.sidebar-collapsed .sidebar-brand {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-brand-name {
  font-family: var(--font-heading);
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--neutral-0);
  white-space: nowrap;
}

.sidebar-brand-sub {
  font-size: var(--fs-xs);
  color: var(--neutral-500);
  white-space: nowrap;
}

/* -- Sidebar Navigation -- */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-4) var(--space-2);
}

.sidebar-nav::-webkit-scrollbar {
  width: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
}

.sidebar-section {
  margin-bottom: var(--space-5);
}

.sidebar-section-title {
  font-size: 10px;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--neutral-500);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
  white-space: nowrap;
  overflow: hidden;
}

.app-layout.sidebar-collapsed .sidebar-section-title {
  text-align: center;
  font-size: 0;
}

.app-layout.sidebar-collapsed .sidebar-section-title::after {
  content: '•••';
  font-size: 10px;
  letter-spacing: 2px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2-5, 10px) var(--space-3);
  border-radius: var(--radius-md);
  color: var(--neutral-400);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
  text-decoration: none;
  margin-bottom: var(--space-0-5);
}

.sidebar-link:hover {
  color: var(--neutral-200);
  background: rgba(255, 255, 255, 0.06);
}

.sidebar-link.active {
  color: var(--neutral-0);
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.sidebar-link-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--fs-lg);
}

.sidebar-link-text {
  flex: 1;
  overflow: hidden;
  opacity: 1;
  transition: opacity var(--transition-fast);
}

.app-layout.sidebar-collapsed .sidebar-link-text {
  opacity: 0;
  width: 0;
}

.sidebar-link-badge {
  margin-left: auto;
  transition: opacity var(--transition-fast);
}

.app-layout.sidebar-collapsed .sidebar-link-badge {
  opacity: 0;
}

/* -- Submenu -- */
.sidebar-submenu {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.35s ease;
  padding-left: var(--space-5);
}

.sidebar-submenu.open {
  max-height: 300px;
}

.sidebar-link.has-submenu .sidebar-link-chevron {
  margin-left: auto;
  transition: transform var(--transition-fast);
  font-size: var(--fs-xs);
}

.sidebar-link.has-submenu.open .sidebar-link-chevron {
  transform: rotate(90deg);
}

.app-layout.sidebar-collapsed .sidebar-link-chevron {
  display: none;
}

.sidebar-submenu-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-sm);
  color: var(--neutral-500);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}

.sidebar-submenu-link::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--neutral-600);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.sidebar-submenu-link:hover {
  color: var(--neutral-200);
}

.sidebar-submenu-link:hover::before {
  background: var(--neutral-400);
}

.sidebar-submenu-link.active {
  color: var(--primary-300);
}

.sidebar-submenu-link.active::before {
  background: var(--primary-400);
}

/* -- Sidebar Footer -- */
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.sidebar-user:hover {
  background: rgba(255, 255, 255, 0.06);
}

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--neutral-0);
  flex-shrink: 0;
}

.sidebar-user-info {
  min-width: 0;
  opacity: 1;
  transition: opacity var(--transition-fast);
}

.app-layout.sidebar-collapsed .sidebar-user-info {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar-user-name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--neutral-200);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: var(--fs-xs);
  color: var(--neutral-500);
}

/* -- Sidebar Overlay (Mobile) -- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  -webkit-tap-highlight-color: transparent;
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
  pointer-events: auto;
}



/* ══════════════════════════════════════════════════════════════════════════
   3. TOP NAVBAR
   ══════════════════════════════════════════════════════════════════════════ */

.navbar {
  position: fixed;
  top: 0;
  right: 0;
  left: var(--sidebar-width);
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--neutral-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: var(--z-sticky);
  transition: left var(--transition-base);
}

.app-layout.sidebar-collapsed .navbar {
  left: var(--sidebar-collapsed);
}

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

.navbar-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--neutral-600);
  cursor: pointer;
  transition: all var(--transition-fast);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}

.navbar-toggle:hover {
  background: var(--neutral-100);
  color: var(--neutral-800);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
}

.breadcrumb-item {
  color: var(--neutral-500);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-item a {
  color: var(--neutral-500);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-item.active {
  color: var(--neutral-800);
  font-weight: var(--fw-medium);
}

.breadcrumb-separator {
  color: var(--neutral-300);
  font-size: var(--fs-xs);
}

/* Navbar Right Actions */
.navbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-search {
  position: relative;
  margin-right: var(--space-2);
}

.navbar-search input {
  width: 240px;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-10);
  font-size: var(--fs-sm);
  background: var(--neutral-100);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.navbar-search input:focus {
  width: 300px;
  background: var(--neutral-0);
  border-color: var(--primary-300);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.navbar-search input::placeholder {
  color: var(--neutral-400);
}

.navbar-search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--neutral-400);
  pointer-events: none;
}

/* Notification Bell */
.navbar-notification {
  position: relative;
}

.navbar-notification .badge-count {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  font-size: 10px;
}

/* Notification Dropdown */
.notification-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 360px;
  background: var(--neutral-0);
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.notification-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.notification-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--neutral-200);
}

.notification-header h5 {
  margin: 0;
}

.notification-list {
  max-height: 340px;
  overflow-y: auto;
}

.notification-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--neutral-100);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.notification-item:hover {
  background: var(--neutral-50);
}

.notification-item.unread {
  background: var(--primary-50);
}

.notification-item.unread:hover {
  background: var(--primary-100);
}

.notification-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--fs-md);
}

.notification-body {
  flex: 1;
  min-width: 0;
}

.notification-text {
  font-size: var(--fs-sm);
  color: var(--neutral-700);
  line-height: var(--lh-normal);
}

.notification-time {
  font-size: var(--fs-xs);
  color: var(--neutral-400);
  margin-top: var(--space-0-5);
}

.notification-footer {
  padding: var(--space-3) var(--space-4);
  text-align: center;
  border-top: 1px solid var(--neutral-200);
}

.notification-footer a {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
}

/* Navbar User Dropdown */
.navbar-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-1);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.navbar-user:hover {
  background: var(--neutral-100);
}

.navbar-user-name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--neutral-700);
}


/* ══════════════════════════════════════════════════════════════════════════
   4. PAGE LAYOUT UTILITIES
   ══════════════════════════════════════════════════════════════════════════ */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--neutral-900);
  margin-bottom: var(--space-1);
}

.page-subtitle {
  font-size: var(--fs-sm);
  color: var(--neutral-500);
}

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Grid layouts */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

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

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

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

/* Content section spacing */
.section {
  margin-bottom: var(--space-6);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--neutral-900);
  margin-bottom: var(--space-4);
}


/* ══════════════════════════════════════════════════════════════════════════
   5. AUTH LAYOUT (Login/Register - Full-page, no sidebar)
   ══════════════════════════════════════════════════════════════════════════ */

.auth-layout {
  display: flex;
  min-height: 100vh;
}

.auth-left {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  background: var(--neutral-0);
}

.auth-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-600) 50%, var(--secondary-600) 100%);
  position: relative;
  overflow: hidden;
}

.auth-right::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  border-radius: 50%;
}

.auth-right::after {
  content: '';
  position: absolute;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  bottom: -80px;
  left: -80px;
  border-radius: 50%;
}

.auth-box {
  width: 100%;
  max-width: 420px;
}

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

.auth-header .sidebar-logo {
  margin-bottom: var(--space-5);
}

.auth-title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--neutral-900);
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  font-size: var(--fs-base);
  color: var(--neutral-500);
}

.auth-form .form-group {
  margin-bottom: var(--space-4);
}

.auth-form .btn {
  margin-top: var(--space-2);
}

.auth-footer {
  margin-top: var(--space-6);
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--neutral-500);
}

.auth-footer a {
  font-weight: var(--fw-semibold);
}

/* Auth illustration panel */
.auth-illustration {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--neutral-0);
  max-width: 480px;
}

.auth-illustration h2 {
  font-family: var(--font-heading);
  color: var(--neutral-0);
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-4);
}

.auth-illustration p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
}

.auth-illustration img {
  max-width: 320px;
  margin: 0 auto var(--space-8);
}


/* ══════════════════════════════════════════════════════════════════════════
   6. LANDING PAGE LAYOUT (Full-width, no sidebar)
   ══════════════════════════════════════════════════════════════════════════ */

.landing-layout {
  min-height: 100vh;
}

.landing-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
  background: transparent;
}

.landing-navbar.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-sm);
}

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

.landing-nav-brand span {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--neutral-900);
}

.landing-nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.landing-nav-links a {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--neutral-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.landing-nav-links a:hover {
  color: var(--primary-600);
}

.landing-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile Nav Toggle */
.landing-nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--neutral-600);
  cursor: pointer;
  font-size: var(--fs-xl);
}

/* Mobile Nav Menu */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  background: var(--neutral-0);
  border-bottom: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  z-index: var(--z-fixed);
  animation: fadeInDown 0.3s ease;
}

.mobile-nav.show {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-base);
  color: var(--neutral-700);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.mobile-nav a:hover {
  background: var(--neutral-50);
}

.mobile-nav .btn {
  width: 100%;
  margin-top: var(--space-3);
}