/* ==========================================================================
   Petlify UI — Shared Web Components & App Shell
   Standard: docs/design/Petlify_Web_Design_Standard.md
   Version: 1.0 (P0)
   ========================================================================== */

/* --- 1. Base & Reset Defaults --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--pl-font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--pl-text);
  background-color: var(--pl-canvas);
  min-height: 100%;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography Hierarchy */
h1, .h1 {
  font-size: 1.75rem; /* 28px mobile */
  line-height: 1.25;
  font-weight: 700;
  color: var(--pl-deep);
  margin-top: 0;
  margin-bottom: var(--pl-space-3);
}

@media (min-width: 1200px) {
  h1, .h1 {
    font-size: 2rem; /* 32px desktop */
  }
}

h2, .h2 {
  font-size: 1.5rem; /* 24px */
  line-height: 1.3;
  font-weight: 700;
  color: var(--pl-deep);
  margin-top: 0;
  margin-bottom: var(--pl-space-3);
}

h3, .h3 {
  font-size: 1.25rem; /* 20px */
  line-height: 1.35;
  font-weight: 700;
  color: var(--pl-deep);
  margin-top: 0;
  margin-bottom: var(--pl-space-2);
}

p {
  margin-top: 0;
  margin-bottom: var(--pl-space-4);
}

a {
  color: var(--pl-primary);
  text-decoration: none;
  transition: color 150ms ease;
}

a:hover {
  color: var(--pl-primary-hover);
  text-decoration: underline;
}

/* --- 2. Accessibility & Focus --- */
:focus-visible {
  outline: 2px solid var(--pl-focus);
  outline-offset: 2px;
}

/* Skip Link */
.pl-skip-link {
  position: absolute;
  top: -100px;
  left: var(--pl-space-4);
  background-color: var(--pl-deep);
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: var(--pl-space-2) var(--pl-space-4);
  border-radius: var(--pl-radius-pill);
  z-index: 9999;
  text-decoration: none;
  box-shadow: var(--pl-shadow);
  transition: top 150ms ease;
}

.pl-skip-link:focus {
  top: var(--pl-space-4);
  outline: 2px solid var(--pl-focus);
  outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- 3. App Shell Structure --- */
.pl-app-shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* Desktop Sidebar */
.pl-sidebar {
  display: none;
}

@media (min-width: 1200px) {
  .pl-sidebar {
    display: flex;
    flex-direction: column;
    width: var(--pl-sidebar-width);
    min-width: var(--pl-sidebar-width);
    background-color: var(--pl-surface);
    border-right: 1px solid var(--pl-border);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1020;
  }
}

.pl-sidebar-brand {
  height: var(--pl-header-height-desktop);
  display: flex;
  align-items: center;
  gap: var(--pl-space-2);
  padding: 0 var(--pl-space-6);
  border-bottom: 1px solid var(--pl-border);
  text-decoration: none;
  color: var(--pl-deep);
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.pl-sidebar-brand:hover {
  text-decoration: none;
  color: var(--pl-primary);
}

.pl-brand-icon {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--pl-primary), var(--pl-rose));
  color: #ffffff;
  border-radius: 0.625rem;
  font-size: 1.125rem;
}

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

.pl-sidebar-footer {
  padding: var(--pl-space-4) var(--pl-space-3);
  border-top: 1px solid var(--pl-border);
  display: flex;
  flex-direction: column;
  gap: var(--pl-space-1);
}

/* Offcanvas Drawer (Mobile / Tablet) */
.pl-drawer {
  max-width: 280px;
  background-color: var(--pl-surface);
  border-right: 1px solid var(--pl-border);
}

.pl-drawer .offcanvas-header {
  height: var(--pl-header-height-mobile);
  padding: 0 var(--pl-space-4);
  border-bottom: 1px solid var(--pl-border);
}

.pl-drawer .offcanvas-title {
  display: flex;
  align-items: center;
  gap: var(--pl-space-2);
  font-weight: 800;
  color: var(--pl-deep);
}

.pl-drawer .offcanvas-body {
  padding: var(--pl-space-4) var(--pl-space-3);
  display: flex;
  flex-direction: column;
  gap: var(--pl-space-1);
}

/* Nav Link Items */
.pl-nav-item {
  display: flex;
  align-items: center;
  gap: var(--pl-space-3);
  padding: var(--pl-space-2) var(--pl-space-3);
  min-height: 44px; /* Accessible target */
  border-radius: var(--pl-radius-control);
  color: var(--pl-text);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease;
  position: relative;
}

.pl-nav-item:hover {
  background-color: rgba(112, 65, 123, 0.06);
  color: var(--pl-primary);
  text-decoration: none;
}

.pl-nav-item.active,
.pl-nav-item[aria-current="page"] {
  background-color: rgba(112, 65, 123, 0.12);
  color: var(--pl-primary);
  font-weight: 700;
}

.pl-nav-item.active::before,
.pl-nav-item[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  background-color: var(--pl-primary);
  border-radius: 0 var(--pl-radius-pill) var(--pl-radius-pill) 0;
}

.pl-nav-item--pending {
  color: var(--pl-muted);
  cursor: default;
  opacity: 0.85;
}

.pl-nav-item--pending:hover {
  background-color: transparent;
  color: var(--pl-muted);
}

.pl-nav-icon {
  width: 1.5rem;
  height: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.125rem;
}

.pl-nav-label {
  flex-grow: 1;
}

.pl-nav-badge {
  font-size: 0.6875rem;
  padding: 2px 6px;
  background-color: var(--pl-cream);
  color: var(--pl-deep);
  border-radius: var(--pl-radius-pill);
  font-weight: 600;
}

/* App Main Container (Header + Content + Footer) */
.pl-main-wrapper {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  min-width: 0; /* Prevent flex blowout */
  min-height: 100vh;
}

/* Header */
.pl-header {
  height: var(--pl-header-height-mobile);
  min-height: var(--pl-header-height-mobile);
  background-color: rgba(255, 253, 249, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--pl-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 var(--pl-space-4);
}

@media (min-width: 1200px) {
  .pl-header {
    height: var(--pl-header-height-desktop);
    min-height: var(--pl-header-height-desktop);
    padding: 0 var(--pl-space-8);
  }
}

.pl-header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--pl-space-4);
}

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

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

/* Drawer Toggle Button (Mobile/Tablet) */
.pl-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pl-space-1);
  min-width: 44px;
  min-height: 44px;
  padding: var(--pl-space-2) var(--pl-space-3);
  border: 1px solid var(--pl-border);
  background-color: var(--pl-surface);
  color: var(--pl-deep);
  border-radius: var(--pl-radius-control);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.pl-menu-toggle:hover {
  background-color: rgba(112, 65, 123, 0.05);
  border-color: var(--pl-control-border);
}

@media (min-width: 1200px) {
  .pl-menu-toggle {
    display: none;
  }
}

/* Main Content Area */
.pl-main-content {
  flex-grow: 1;
  width: 100%;
  padding: var(--pl-space-4); /* 16px mobile */
}

@media (min-width: 768px) {
  .pl-main-content {
    padding: var(--pl-space-6); /* 24px tablet */
  }
}

@media (min-width: 1200px) {
  .pl-main-content {
    padding: var(--pl-space-8); /* 32px desktop */
  }
}

.pl-container {
  width: 100%;
  max-width: var(--pl-content-max);
  margin: 0 auto;
}

/* Footer */
.pl-footer {
  padding: var(--pl-space-6) var(--pl-space-4);
  background-color: var(--pl-surface);
  border-top: 1px solid var(--pl-border);
  font-size: 0.875rem;
  color: var(--pl-muted);
}

@media (min-width: 768px) {
  .pl-footer {
    padding: var(--pl-space-6) var(--pl-space-8);
  }
}

.pl-footer-inner {
  max-width: var(--pl-content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--pl-space-2);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .pl-footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* --- 4. Component Library --- */

/* Buttons */
.pl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pl-space-2);
  min-height: 44px; /* Accessible target */
  padding: var(--pl-space-2) var(--pl-space-6);
  border-radius: var(--pl-radius-pill);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 150ms ease;
  white-space: nowrap;
}

.pl-btn:disabled,
.pl-btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button Variants */
.pl-btn-primary {
  background-color: var(--pl-primary);
  color: #ffffff !important;
  border-color: var(--pl-primary);
}

.pl-btn-primary:hover {
  background-color: var(--pl-primary-hover);
  border-color: var(--pl-primary-hover);
  text-decoration: none;
}

.pl-btn-secondary {
  background-color: var(--pl-surface);
  color: var(--pl-primary) !important;
  border-color: var(--pl-primary);
}

.pl-btn-secondary:hover {
  background-color: rgba(112, 65, 123, 0.06);
  border-color: var(--pl-primary-hover);
  text-decoration: none;
}

.pl-btn-ghost {
  background-color: transparent;
  color: var(--pl-primary) !important;
  border-color: transparent;
}

.pl-btn-ghost:hover {
  background-color: rgba(112, 65, 123, 0.08);
  text-decoration: none;
}

.pl-btn-danger {
  background-color: var(--pl-danger);
  color: #ffffff !important;
  border-color: var(--pl-danger);
}

.pl-btn-danger:hover {
  background-color: #832034;
  border-color: #832034;
  text-decoration: none;
}

/* Cards */
.pl-card {
  background-color: var(--pl-surface);
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-card);
  padding: var(--pl-space-4);
  box-shadow: var(--pl-shadow-sm);
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

@media (min-width: 768px) {
  .pl-card {
    padding: var(--pl-space-6);
  }
}

.pl-card:hover {
  box-shadow: var(--pl-shadow);
  border-color: rgba(112, 65, 123, 0.2);
}

.pl-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--pl-space-4);
  padding-bottom: var(--pl-space-3);
  border-bottom: 1px solid var(--pl-border);
}

/* Page Header Component */
.pl-page-header {
  display: flex;
  flex-direction: column;
  gap: var(--pl-space-3);
  margin-bottom: var(--pl-space-6);
}

@media (min-width: 768px) {
  .pl-page-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.pl-page-header-content {
  flex-grow: 1;
}

.pl-page-header-title {
  margin-bottom: var(--pl-space-1);
}

.pl-page-header-desc {
  color: var(--pl-muted);
  margin-bottom: 0;
  font-size: 0.9375rem;
}

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

/* Form Fields */
.pl-field {
  display: flex;
  flex-direction: column;
  gap: var(--pl-space-1);
  margin-bottom: var(--pl-space-4);
}

.pl-label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--pl-deep);
}

.pl-label-required::after {
  content: " *";
  color: var(--pl-danger);
}

.pl-input,
.pl-select,
.pl-textarea {
  width: 100%;
  min-height: 44px;
  padding: 0.625rem 0.875rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--pl-text);
  background-color: var(--pl-surface);
  border: 1px solid var(--pl-control-border);
  border-radius: var(--pl-radius-control);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.pl-textarea {
  min-height: 100px;
  resize: vertical;
}

.pl-input:focus,
.pl-select:focus,
.pl-textarea:focus {
  border-color: var(--pl-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(112, 65, 123, 0.2);
}

.pl-field-helper {
  font-size: 0.8125rem;
  color: var(--pl-muted);
}

.pl-field-error {
  font-size: 0.8125rem;
  color: var(--pl-danger);
  font-weight: 500;
}

/* Status Badges */
.pl-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--pl-space-1);
  padding: 0.25rem 0.625rem;
  border-radius: var(--pl-radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.25;
}

.pl-badge-success {
  background-color: var(--pl-success-bg);
  color: var(--pl-success);
}

.pl-badge-warning {
  background-color: var(--pl-warning-bg);
  color: var(--pl-warning);
}

.pl-badge-danger {
  background-color: var(--pl-danger-bg);
  color: var(--pl-danger);
}

.pl-badge-neutral {
  background-color: rgba(112, 65, 123, 0.08);
  color: var(--pl-deep);
}

/* Alert Notification Banners */
.pl-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--pl-space-3);
  padding: var(--pl-space-4);
  border-radius: var(--pl-radius-control);
  margin-bottom: var(--pl-space-4);
  font-size: 0.9375rem;
  position: relative;
}

.pl-alert-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1;
}

.pl-alert-content {
  flex-grow: 1;
}

.pl-alert-close {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  line-height: 1;
  color: inherit;
  opacity: 0.7;
  cursor: pointer;
  padding: var(--pl-space-1);
  margin: -0.25rem -0.25rem 0 0;
}

.pl-alert-close:hover {
  opacity: 1;
}

.pl-alert-success {
  background-color: var(--pl-success-bg);
  color: var(--pl-success);
  border: 1px solid rgba(35, 99, 68, 0.2);
}

.pl-alert-warning {
  background-color: var(--pl-warning-bg);
  color: var(--pl-warning);
  border: 1px solid rgba(121, 83, 0, 0.2);
}

.pl-alert-danger {
  background-color: var(--pl-danger-bg);
  color: var(--pl-danger);
  border: 1px solid rgba(161, 45, 69, 0.2);
}

.pl-alert-info {
  background-color: var(--pl-cream);
  color: var(--pl-deep);
  border: 1px solid rgba(112, 65, 123, 0.15);
}

/* Validation Summary */
.pl-validation-summary {
  padding: var(--pl-space-4);
  border-radius: var(--pl-radius-control);
  background-color: var(--pl-danger-bg);
  color: var(--pl-danger);
  border: 1px solid rgba(161, 45, 69, 0.25);
  margin-bottom: var(--pl-space-4);
}

.pl-validation-summary-title {
  font-weight: 700;
  margin-bottom: var(--pl-space-2);
  display: flex;
  align-items: center;
  gap: var(--pl-space-2);
}

.pl-validation-summary ul {
  margin: 0;
  padding-left: var(--pl-space-4);
}

.pl-validation-summary li {
  margin-bottom: var(--pl-space-1);
}

/* Empty State Component */
.pl-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--pl-space-12) var(--pl-space-4);
  max-width: 480px;
  margin: 0 auto;
}

.pl-empty-icon {
  width: 4rem;
  height: 4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--pl-radius-pill);
  background-color: var(--pl-cream);
  color: var(--pl-deep);
  font-size: 2rem;
  margin-bottom: var(--pl-space-4);
}

.pl-empty-title {
  color: var(--pl-deep);
  margin-bottom: var(--pl-space-2);
}

.pl-empty-desc {
  color: var(--pl-muted);
  margin-bottom: var(--pl-space-6);
  line-height: 1.5;
}

/* User Dropdown / Header Profile */
.pl-user-menu {
  display: flex;
  align-items: center;
  gap: var(--pl-space-2);
}

.pl-user-avatar {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--pl-radius-pill);
  background-color: var(--pl-cream);
  color: var(--pl-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  border: 1px solid var(--pl-border);
}

.pl-user-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--pl-deep);
  display: none;
}

@media (min-width: 576px) {
  .pl-user-name {
    display: inline;
  }
}

/* Reflow & Small Mobile (< 360px) Protection */
@media (max-width: 360px) {
  body {
    word-break: break-word;
  }
  .pl-btn {
    padding: var(--pl-space-2) var(--pl-space-3);
    font-size: 0.875rem;
  }
  .pl-card {
    padding: var(--pl-space-3);
  }
}