/* ============================================
   MOBILE-FIRST RESPONSIVE DESIGN
   Complete mobile optimization from 375px to 1920px
   ============================================ */

:root {
  /* Responsive spacing scale */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 48px;

  /* Minimum touch target size */
  --touch-min: 44px;

  /* Mobile-first font sizes */
  --font-xs: clamp(10px, 2vw, 12px);
  --font-sm: clamp(12px, 2.5vw, 14px);
  --font-base: clamp(14px, 3vw, 16px);
  --font-lg: clamp(16px, 3.5vw, 18px);
  --font-xl: clamp(18px, 4vw, 20px);
  --font-2xl: clamp(20px, 4.5vw, 24px);
  --font-3xl: clamp(24px, 5vw, 28px);
  --font-4xl: clamp(28px, 6vw, 36px);
  --font-5xl: clamp(32px, 7vw, 42px);
  --font-6xl: clamp(36px, 8vw, 48px);
}

/* ============================================
   MOBILE BASE (375px - 480px)
   ============================================ */

html, body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}

body {
  font-size: var(--font-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
}

/* Viewport optimization */
@supports (padding: max(0px)) {
  .container,
  .dashboard-container {
    padding: max(var(--spacing-lg), env(safe-area-inset-left))
             max(var(--spacing-lg), env(safe-area-inset-right));
  }
}

.container,
.dashboard-container {
  width: 100%;
  padding: var(--spacing-lg);
  margin: 0 auto;
  box-sizing: border-box;
}

/* ============================================
   HEADER RESPONSIVE - MOBILE
   ============================================ */

.header {
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg) !important;
  margin-bottom: var(--spacing-xl);
  border-radius: 12px;
}

.logo {
  font-size: var(--font-2xl);
  min-height: var(--touch-min);
  display: flex;
  align-items: center;
}

.logo i {
  font-size: var(--font-2xl) !important;
}

.user-info {
  width: 100%;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  order: 3;
}

.user-id {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-xs);
  flex: 1;
  min-width: 120px;
}

/* Mobile Navigation */
.nav-links {
  width: 100%;
  order: 2;
  grid-template-columns: repeat(2, 1fr) !important;
  gap: var(--spacing-md) !important;
  overflow-x: visible;
  flex-wrap: wrap;
}

.nav-btn {
  min-height: var(--touch-min);
  padding: var(--spacing-md) var(--spacing-lg) !important;
  font-size: var(--font-xs);
  border-radius: 10px;
  flex: 1;
  min-width: calc(50% - var(--spacing-md));
}

/* ============================================
   HAMBURGER MENU - MOBILE
   ============================================ */

.mobile-menu-toggle {
  display: none;
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  padding: var(--spacing-md);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(0, 212, 255, 0.05));
  border: 2px solid rgba(59, 130, 246, 0.3);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all 0.3s ease;
}

.mobile-menu-toggle:active {
  transform: scale(0.95);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: #e2e8f0;
  border-radius: 1px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translateY(10px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translateY(-10px);
}

/* ============================================
   CARDS & STAT CARDS - MOBILE
   ============================================ */

.card,
.stat-card {
  padding: var(--spacing-lg) !important;
  margin-bottom: var(--spacing-xl);
  border-radius: 12px;
  width: 100%;
}

.stat-icon {
  font-size: clamp(28px, 8vw, 40px) !important;
  margin-bottom: var(--spacing-md) !important;
}

.stat-title {
  font-size: var(--font-xs) !important;
  margin-bottom: var(--spacing-sm) !important;
}

.stat-value {
  font-size: clamp(20px, 8vw, 36px) !important;
  margin: var(--spacing-md) 0 !important;
}

.stat-desc {
  font-size: var(--font-xs) !important;
  margin-top: var(--spacing-sm) !important;
}

/* Grid for cards */
.card-grid,
[style*="grid-template-columns: repeat(auto-fit"]  {
  grid-template-columns: 1fr !important;
  gap: var(--spacing-lg) !important;
}

/* ============================================
   BUTTONS - MOBILE FRIENDLY
   ============================================ */

.btn,
button,
a[class*="btn"],
input[type="submit"],
input[type="button"] {
  min-height: var(--touch-min);
  min-width: var(--touch-min);
  padding: var(--spacing-md) var(--spacing-lg) !important;
  font-size: var(--font-sm);
  border-radius: 10px;
  margin: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600 !important;
  transition: all 0.3s ease;
  -webkit-user-select: none;
  user-select: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn:active,
button:active {
  transform: scale(0.98) !important;
}

/* ============================================
   FORMS - MOBILE FRIENDLY
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
  width: 100%;
}

.form-group label {
  font-size: var(--font-sm);
  margin-bottom: var(--spacing-md);
  display: block;
  font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  min-height: var(--touch-min);
  padding: var(--spacing-md) var(--spacing-lg) !important;
  font-size: var(--font-base);
  border-radius: 10px;
  font-family: inherit;
  /* Prevent zoom on focus (iOS) */
  font-size: 16px;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* Focus styles for better accessibility */
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  font-size: 16px;
}

/* ============================================
   TABLES - MOBILE RESPONSIVE
   ============================================ */

table {
  width: 100%;
  font-size: var(--font-sm);
  border-collapse: collapse;
}

thead {
  display: none;
}

tbody tr {
  display: block;
  margin-bottom: var(--spacing-lg);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 10px;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(26, 31, 46, 0.9) 0%, rgba(33, 40, 53, 0.4) 100%);
}

td {
  display: block;
  padding: var(--spacing-sm) 0;
  text-align: left;
  word-break: break-word;
}

td:before {
  content: attr(data-label);
  font-weight: 700;
  color: var(--accent-cyan);
  display: block;
  font-size: var(--font-xs);
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================
   CHARTS - MOBILE RESPONSIVE
   ============================================ */

[style*="height: 240px"],
.chart-container {
  height: 200px !important;
  max-width: 100%;
  overflow-x: auto;
}

canvas {
  max-width: 100% !important;
  height: auto !important;
}

svg {
  max-width: 100%;
  height: auto;
}

/* ============================================
   IMAGES - RESPONSIVE
   ============================================ */

img {
  max-width: 100%;
  height: auto;
  display: block;
}

img[style*="width"] {
  width: 100% !important;
  max-width: 100%;
}

/* ============================================
   MODALS & OVERLAYS - MOBILE
   ============================================ */

.modal,
[class*="modal"],
[class*="overlay"] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  padding: var(--spacing-lg);
}

.modal-content,
[class*="modal-content"] {
  max-width: 100%;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

/* ============================================
   TEXT UTILITIES - MOBILE
   ============================================ */

h1 { font-size: var(--font-4xl); }
h2 { font-size: var(--font-3xl); }
h3 { font-size: var(--font-2xl); }
h4 { font-size: var(--font-xl); }
h5 { font-size: var(--font-lg); }
h6 { font-size: var(--font-base); }

p { font-size: var(--font-base); }
small { font-size: var(--font-sm); }

/* Prevent text from zooming on focus */
input[type="text"],
input[type="email"],
input[type="password"],
textarea {
  font-size: 16px !important;
}

/* ============================================
   TABLET (480px - 768px)
   ============================================ */

@media (min-width: 480px) {
  .nav-links {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  .nav-btn {
    min-width: auto;
  }

  thead {
    display: table-header-group;
  }

  tbody tr {
    display: table-row;
  }

  td {
    display: table-cell;
    padding: var(--spacing-md);
  }

  td:before {
    content: none;
  }

  [style*="grid-template-columns: repeat(auto-fit"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* ============================================
   TABLET LANDSCAPE / SMALL DESKTOP (768px - 1024px)
   ============================================ */

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none !important;
  }

  .header {
    flex-wrap: nowrap;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl) !important;
  }

  .user-info {
    width: auto;
    order: auto;
  }

  .nav-links {
    width: auto;
    order: auto;
    grid-template-columns: auto-fit !important;
    gap: var(--spacing-lg) !important;
    margin-top: 0;
    flex-wrap: nowrap;
  }

  .nav-btn {
    min-width: auto;
    flex: none;
    padding: var(--spacing-md) var(--spacing-lg) !important;
  }

  .container,
  .dashboard-container {
    padding: var(--spacing-xl) var(--spacing-2xl);
  }

  .card,
  .stat-card {
    padding: var(--spacing-xl) !important;
  }

  [style*="grid-template-columns: repeat(auto-fit"] {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)) !important;
  }

  [style*="grid-template-columns: repeat(2"] {
    grid-template-columns: repeat(3, 1fr) !important;
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: var(--spacing-md) var(--spacing-lg) !important;
  }

  [style*="height: 200px"] {
    height: 300px !important;
  }

  [style*="height: 240px"] {
    height: 280px !important;
  }
}

/* ============================================
   DESKTOP (1024px - 1280px)
   ============================================ */

@media (min-width: 1024px) {
  :root {
    --spacing-lg: 20px;
    --spacing-xl: 30px;
  }

  .container,
  .dashboard-container {
    max-width: 1200px;
    padding: var(--spacing-2xl) var(--spacing-3xl);
  }

  [style*="grid-template-columns: repeat(auto-fit"] {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)) !important;
  }

  [style*="height: 240px"] {
    height: 320px !important;
  }

  .header {
    padding: var(--spacing-xl) var(--spacing-2xl) !important;
  }

  .nav-links {
    gap: var(--spacing-xl) !important;
  }
}

/* ============================================
   LARGE DESKTOP (1280px - 1920px)
   ============================================ */

@media (min-width: 1280px) {
  .container,
  .dashboard-container {
    max-width: 1400px;
  }

  [style*="grid-template-columns: repeat(auto-fit"] {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)) !important;
  }

  .stat-value {
    font-size: clamp(28px, 5vw, 42px) !important;
  }
}

/* ============================================
   ULTRA-WIDE (1920px+)
   ============================================ */

@media (min-width: 1920px) {
  .container,
  .dashboard-container {
    max-width: 1600px;
  }

  :root {
    --spacing-xl: 40px;
    --spacing-2xl: 48px;
  }

  .header {
    gap: var(--spacing-xl);
  }

  .nav-links {
    gap: var(--spacing-2xl) !important;
  }
}

/* ============================================
   LANDSCAPE ORIENTATION - MOBILE
   ============================================ */

@media (max-height: 500px) and (orientation: landscape) {
  body {
    overflow-y: auto;
  }

  .header {
    margin-bottom: var(--spacing-lg);
  }

  .container,
  .dashboard-container {
    padding: var(--spacing-md);
  }

  .card,
  .stat-card {
    padding: var(--spacing-md) !important;
    margin-bottom: var(--spacing-md);
  }

  h1 { font-size: var(--font-2xl); }
  h2 { font-size: var(--font-xl); }
  h3 { font-size: var(--font-lg); }

  .stat-value {
    font-size: clamp(16px, 6vw, 24px) !important;
  }

  [style*="height: 240px"],
  .chart-container {
    height: 150px !important;
  }

  .user-info {
    flex-direction: column;
  }
}

/* ============================================
   TOUCH DEVICE ENHANCEMENTS
   ============================================ */

@media (hover: none) and (pointer: coarse) {
  .btn:hover,
  button:hover,
  a[class*="btn"]:hover {
    transform: none !important;
  }

  .btn:active,
  button:active {
    transform: scale(0.96) !important;
    opacity: 0.9;
  }

  .card:hover {
    transform: none !important;
  }

  .nav-btn:hover {
    transform: none !important;
  }
}

/* ============================================
   HIGH DPI / RETINA DISPLAYS
   ============================================ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  body {
    -webkit-font-smoothing: subpixel-antialiased;
  }

  border: 0.5px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   DARK MODE OPTIMIZATIONS
   ============================================ */

@media (prefers-color-scheme: dark) {
  body {
    background: #0f172a;
    color: #e5e7eb;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  textarea,
  select {
    background: rgba(15, 23, 42, 0.8);
    color: #e5e7eb;
    border-color: rgba(59, 130, 246, 0.25);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  body {
    background: white;
    color: black;
  }

  .header,
  .footer,
  .nav-links,
  .nav-btn {
    display: none;
  }

  .container,
  .dashboard-container {
    max-width: 100%;
    padding: 0;
  }

  .card {
    page-break-inside: avoid;
    border: 1px solid #ccc;
  }
}

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

/* High contrast mode */
@media (prefers-contrast: more) {
  .btn,
  button,
  a[class*="btn"] {
    border-width: 2px;
  }

  .nav-btn {
    border-width: 2px;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

.hidden-mobile {
  display: none !important;
}

@media (min-width: 768px) {
  .hidden-mobile {
    display: block !important;
  }

  .hidden-desktop {
    display: none !important;
  }
}

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