/* ============================================================================
   DRONIFY UI DESIGN LIBRARY - BASE STYLES & RESET
   Modern CSS reset and foundational styles
   ============================================================================ */

/* ========== MODERN CSS RESET ========== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-900);
  background-color: var(--dronify-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html,
body {
  min-height: 100%;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
}

a {
  color: var(--color-primary-600);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.2em;
  transition: var(--transition-colors);
}

a:hover,
a:focus {
  color: var(--color-primary-700);
  text-decoration-color: currentColor;
}

a:focus {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ========== TYPOGRAPHY SCALE ========== */

.text-xs { font-size: var(--text-xs); line-height: 1.25; }
.text-sm { font-size: var(--text-sm); line-height: 1.375; }
.text-base { font-size: var(--text-base); line-height: var(--leading-normal); }
.text-lg { font-size: var(--text-lg); line-height: 1.555; }
.text-xl { font-size: var(--text-xl); line-height: 1.6; }
.text-2xl { font-size: var(--text-2xl); line-height: var(--leading-tight); }
.text-3xl { font-size: var(--text-3xl); line-height: var(--leading-tight); }
.text-4xl { font-size: var(--text-4xl); line-height: var(--leading-tight); }
.text-5xl { font-size: var(--text-5xl); line-height: 1; }
.text-6xl { font-size: var(--text-6xl); line-height: 1; }
.text-7xl { font-size: var(--text-7xl); line-height: 1; }

/* Heading Styles */
h1, .h1 { 
  font-size: var(--text-4xl); 
  font-weight: var(--font-weight-bold); 
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
}

h2, .h2 { 
  font-size: var(--text-3xl); 
  font-weight: var(--font-weight-semibold); 
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-5);
}

h3, .h3 { 
  font-size: var(--text-2xl); 
  font-weight: var(--font-weight-semibold); 
  margin-bottom: var(--space-4);
}

h4, .h4 { 
  font-size: var(--text-xl); 
  font-weight: var(--font-weight-medium); 
  margin-bottom: var(--space-3);
}

h5, .h5 { 
  font-size: var(--text-lg); 
  font-weight: var(--font-weight-medium); 
  margin-bottom: var(--space-2);
}

h6, .h6 { 
  font-size: var(--text-base); 
  font-weight: var(--font-weight-medium); 
  margin-bottom: var(--space-2);
}

/* Text Styles */
p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.lead {
  font-size: var(--text-xl);
  font-weight: var(--font-weight-light);
  line-height: var(--leading-relaxed);
  color: var(--color-neutral-700);
}

.small {
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
}

/* ========== LAYOUT UTILITIES ========== */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container { max-width: var(--container-sm); padding-left: var(--space-6); padding-right: var(--space-6); }
}

@media (min-width: 768px) {
  .container { max-width: var(--container-md); padding-left: var(--space-8); padding-right: var(--space-8); }
}

@media (min-width: 1024px) {
  .container { max-width: var(--container-lg); }
}

@media (min-width: 1280px) {
  .container { max-width: var(--container-xl); }
}

@media (min-width: 1536px) {
  .container { max-width: var(--container-2xl); }
}

.container-max {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: var(--grid-cols-1); }
.grid-cols-2 { grid-template-columns: var(--grid-cols-2); }
.grid-cols-3 { grid-template-columns: var(--grid-cols-3); }
.grid-cols-4 { grid-template-columns: var(--grid-cols-4); }
.grid-cols-6 { grid-template-columns: var(--grid-cols-6); }
.grid-cols-12 { grid-template-columns: var(--grid-cols-12); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: var(--grid-cols-2); }
  .md\:grid-cols-3 { grid-template-columns: var(--grid-cols-3); }
  .md\:grid-cols-4 { grid-template-columns: var(--grid-cols-4); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: var(--grid-cols-2); }
  .lg\:grid-cols-3 { grid-template-columns: var(--grid-cols-3); }
  .lg\:grid-cols-4 { grid-template-columns: var(--grid-cols-4); }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-12 { gap: var(--space-12); }

/* ========== SPACING UTILITIES ========== */

/* Margin */
.m-0 { margin: 0; }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-3 { padding-left: var(--space-3); padding-right: var(--space-3); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.px-8 { padding-left: var(--space-8); padding-right: var(--space-8); }

.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-3 { padding-top: var(--space-3); padding-bottom: var(--space-3); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }

/* ========== VISUAL UTILITIES ========== */

/* Background Colors */
.bg-white { background-color: var(--dronify-white); }
.bg-primary { background-color: var(--color-primary-500); }
.bg-primary-50 { background-color: var(--color-primary-50); }
.bg-primary-100 { background-color: var(--color-primary-100); }
.bg-neutral-50 { background-color: var(--color-neutral-50); }
.bg-neutral-100 { background-color: var(--color-neutral-100); }
.bg-neutral-200 { background-color: var(--color-neutral-200); }
.bg-neutral-900 { background-color: var(--color-neutral-900); }

/* Text Colors */
.text-white { color: var(--dronify-white); }
.text-primary { color: var(--color-primary-600); }
.text-primary-500 { color: var(--color-primary-500); }
.text-neutral-600 { color: var(--color-neutral-600); }
.text-neutral-700 { color: var(--color-neutral-700); }
.text-neutral-900 { color: var(--color-neutral-900); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

/* Border */
.border { border: 1px solid var(--color-neutral-200); }
.border-neutral-200 { border-color: var(--color-neutral-200); }
.border-neutral-300 { border-color: var(--color-neutral-300); }
.border-primary { border-color: var(--color-primary-500); }

.border-t { border-top: 1px solid var(--color-neutral-200); }
.border-b { border-bottom: 1px solid var(--color-neutral-200); }
.border-l { border-left: 1px solid var(--color-neutral-200); }
.border-r { border-right: 1px solid var(--color-neutral-200); }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* ========== ACCESSIBILITY ========== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.focus\:not-sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 0;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Focus styles */
.focus-visible {
  outline: 2px solid var(--focus-ring-color);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-neutral-900);
  color: var(--dronify-white);
  padding: 8px 16px;
  text-decoration: none;
  border-radius: var(--radius-base);
  z-index: var(--z-tooltip);
}

.skip-link:focus {
  top: 6px;
}

/* ========== DESKTOP HOVER ENHANCEMENTS ========== */

/* Enhanced Desktop Hover Effects from Design Review */
@media (min-width: 1024px) {
  .component-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(70, 144, 212, 0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .component-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
}

/* ========== MOBILE TOUCH TARGET ACCESSIBILITY ========== */

/* CRITICAL: Touch Target Compliance - Minimum 44px for all interactive elements */
.btn,
.nav-link,
.navbar-nav-link,
.form-input,
.form-textarea,
.form-select,
.card-link,
.breadcrumb-link,
.sidebar-nav-link,
.dropdown-item {
    min-height: 44px;
    display: flex;
    align-items: center;
}

/* Specific button touch target fixes */
.btn {
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-3) var(--space-4);
}

/* Navigation touch targets */
.nav-link,
.navbar-nav-link,
.sidebar-nav-link {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
}

/* Form element touch targets */
.form-input,
.form-textarea,
.form-select {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
}

/* Touch element spacing - CRITICAL for accessibility */
.touch-element + .touch-element,
.btn + .btn,
.nav-link + .nav-link,
.form-group + .form-group {
    margin-top: 8px;
}

/* Mobile-specific touch improvements */
@media (max-width: 768px) {
    /* Prevent iOS zoom on form inputs */
    .form-input,
    .form-textarea,
    .form-select {
        font-size: 16px !important;
        padding: var(--space-4);
        border-radius: 8px;
    }
    
    /* Ensure proper touch spacing on mobile */
    .btn,
    .nav-link,
    .form-input,
    .card-link {
        margin-bottom: var(--space-2);
    }
    
    /* Enhanced mobile touch targets */
    .btn-xs {
        min-height: 44px;
        min-width: 44px;
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-sm);
    }
    
    .btn-sm {
        min-height: 44px;
        min-width: 44px;
        padding: var(--space-3) var(--space-4);
    }
    
    /* Mobile navigation touch targets */
    .navbar-nav-link {
        min-height: 44px;
        padding: var(--space-4) var(--space-6);
    }
    
    /* Mobile form group spacing */
    .form-group {
        margin-bottom: var(--space-4);
    }
    
    /* Mobile checkbox/radio touch targets */
    .form-checkbox,
    .form-radio {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Mobile card link touch targets */
    .card-link {
        min-height: 44px;
        padding: var(--space-3);
    }
}

/* ========== MOBILE NAVIGATION SYSTEM ========== */

/* Mobile hamburger menu */
.mobile-nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-base);
    transition: var(--transition-colors);
}

.mobile-nav-toggle:hover {
    background-color: var(--color-neutral-100);
}

.mobile-nav-toggle:focus {
    outline: 2px solid var(--focus-ring-color);
    outline-offset: 2px;
}

/* Hamburger icon */
.mobile-nav-icon {
    width: 24px;
    height: 24px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
}

.mobile-nav-icon span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: currentColor;
    border-radius: 1px;
    transition: var(--transition-all);
    transform-origin: center;
}

/* Animated hamburger to X */
.mobile-nav-toggle.active .mobile-nav-icon span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-nav-toggle.active .mobile-nav-icon span:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle.active .mobile-nav-icon span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile navigation drawer */
.mobile-nav-drawer {
    position: fixed;
    top: 0;
    left: -300px;
    width: 300px;
    height: 100vh;
    background: var(--dronify-white);
    border-right: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-xl);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: var(--z-fixed);
    overflow-y: auto;
    padding: var(--space-6);
}

.mobile-nav-drawer.open {
    left: 0;
}

/* Mobile nav overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-nav-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Mobile navigation links */
.mobile-nav-drawer .nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-4);
    text-decoration: none;
    color: var(--color-neutral-700);
    border-radius: var(--radius-lg);
    transition: var(--transition-colors);
    margin-bottom: var(--space-2);
    min-height: 44px;
}

.mobile-nav-drawer .nav-link:hover {
    background-color: var(--color-primary-50);
    color: var(--color-primary-600);
}

/* Show mobile navigation on smaller screens */
@media (max-width: 1023px) {
    .mobile-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ========== MOBILE ACCESSIBILITY ENHANCEMENTS ========== */

/* Enhanced focus indicators for mobile */
@media (max-width: 768px) {
    /* Larger focus indicators for mobile devices */
    .btn:focus-visible,
    .nav-link:focus-visible,
    .form-input:focus,
    .form-textarea:focus,
    .form-select:focus,
    .card-link:focus {
        outline: 3px solid var(--focus-ring-color);
        outline-offset: 3px;
        border-radius: var(--radius-base);
    }
    
    /* Mobile touch feedback */
    .btn:active,
    .nav-link:active,
    .mobile-nav-toggle:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
    
    /* Mobile screen reader improvements */
    .mobile-nav-drawer[aria-hidden="true"] {
        visibility: hidden;
    }
    
    .mobile-nav-drawer[aria-hidden="false"] {
        visibility: visible;
    }
}

/* Mobile keyboard navigation enhancements */
.mobile-nav-drawer .nav-link:focus,
.mobile-dropdown-toggle:focus {
    outline: 2px solid var(--focus-ring-color);
    outline-offset: 2px;
    background-color: var(--color-primary-50);
}

/* Skip links for mobile accessibility */
.mobile-skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-neutral-900);
    color: var(--dronify-white);
    padding: var(--space-3) var(--space-4);
    text-decoration: none;
    border-radius: var(--radius-base);
    z-index: calc(var(--z-fixed) + 10);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.mobile-skip-link:focus {
    top: 6px;
}

/* Mobile reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .mobile-nav-drawer,
    .mobile-nav-overlay,
    .mobile-nav-toggle .mobile-nav-icon span,
    .btn,
    .card {
        transition: none !important;
        animation: none !important;
    }
    
    .mobile-nav-toggle.active .mobile-nav-icon span {
        transform: none !important;
    }
}

/* ========== RESPONSIVE UTILITIES ========== */

.hidden {
  display: none;
}

.block {
  display: block;
}

.inline {
  display: inline;
}

.inline-block {
  display: inline-block;
}

@media (min-width: 640px) {
  .sm\:block { display: block; }
  .sm\:hidden { display: none; }
  .sm\:flex { display: flex; }
}

@media (min-width: 768px) {
  .md\:block { display: block; }
  .md\:hidden { display: none; }
  .md\:flex { display: flex; }
}

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:hidden { display: none; }
  .lg\:flex { display: flex; }
}