/* Responsive Design System for AgriConnectHub */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Breakpoints */
  --bp-xs: 320px;
  --bp-sm: 576px;
  --bp-md: 768px;
  --bp-lg: 992px;
  --bp-xl: 1200px;
  --bp-xxl: 1400px;

  /* Fluid Typography */
  --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --fs-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --fs-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --fs-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --fs-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --fs-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --fs-4xl: clamp(2.25rem, 1.8rem + 2.25vw, 3rem);

  /* Fluid Spacing */
  --space-xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.5rem);
  --space-sm: clamp(0.5rem, 0.4rem + 0.5vw, 0.75rem);
  --space-md: clamp(0.75rem, 0.6rem + 0.75vw, 1rem);
  --space-lg: clamp(1rem, 0.8rem + 1vw, 1.5rem);
  --space-xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --space-2xl: clamp(2rem, 1.6rem + 2vw, 3rem);
  --space-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --space-4xl: clamp(3rem, 2.4rem + 3vw, 5rem);

  /* Container Sizes */
  --container-xs: 100%;
  --container-sm: 540px;
  --container-md: 720px;
  --container-lg: 960px;
  --container-xl: 1140px;
  --container-xxl: 1320px;

  /* Grid Columns */
  --grid-cols-1: repeat(1, 1fr);
  --grid-cols-2: repeat(2, 1fr);
  --grid-cols-3: repeat(3, 1fr);
  --grid-cols-4: repeat(4, 1fr);
  --grid-cols-auto: repeat(auto-fit, minmax(280px, 1fr));
  --grid-cols-auto-sm: repeat(auto-fit, minmax(240px, 1fr));
  --grid-cols-auto-xs: repeat(auto-fit, minmax(200px, 1fr));

  /* Theme Colors */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --accent-primary: #16a34a;
  --accent-secondary: #22c55e;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #334155;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --accent-primary: #22c55e;
  --accent-secondary: #16a34a;
}

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

/* Container System */
.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-lg);
}

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

.grid-auto {
  grid-template-columns: var(--grid-cols-auto);
}

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

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

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

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

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

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

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

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Responsive Typography */
.text-xs { font-size: var(--fs-xs); }
.text-sm { font-size: var(--fs-sm); }
.text-base { font-size: var(--fs-base); }
.text-lg { font-size: var(--fs-lg); }
.text-xl { font-size: var(--fs-xl); }
.text-2xl { font-size: var(--fs-2xl); }
.text-3xl { font-size: var(--fs-3xl); }
.text-4xl { font-size: var(--fs-4xl); }

/* Responsive Spacing */
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }
.p-3xl { padding: var(--space-3xl); }

.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }
.m-2xl { margin: var(--space-2xl); }

/* Responsive Visibility */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

/* ===== BREAKPOINT-SPECIFIC STYLES ===== */

/* Extra Small Devices (320px and up) */
@media (min-width: 320px) {
  .container {
    max-width: var(--container-xs);
    padding: 0 var(--space-md);
  }
  
  .xs\:block { display: block; }
  .xs\:hidden { display: none; }
  .xs\:grid-1 { grid-template-columns: var(--grid-cols-1); }
  .xs\:text-center { text-align: center; }
  .xs\:flex-col { flex-direction: column; }
}

/* Small Devices (576px and up) */
@media (min-width: 576px) {
  .container {
    max-width: var(--container-sm);
    padding: 0 var(--space-lg);
  }
  
  .sm\:block { display: block; }
  .sm\:hidden { display: none; }
  .sm\:grid-2 { grid-template-columns: var(--grid-cols-2); }
  .sm\:grid-auto { grid-template-columns: var(--grid-cols-auto-sm); }
  .sm\:flex-row { flex-direction: row; }
  .sm\:text-left { text-align: left; }
}

/* Medium Devices (768px and up) */
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
  
  .md\:block { display: block; }
  .md\:hidden { display: none; }
  .md\:grid-2 { grid-template-columns: var(--grid-cols-2); }
  .md\:grid-3 { grid-template-columns: var(--grid-cols-3); }
  .md\:grid-auto { grid-template-columns: var(--grid-cols-auto); }
  .md\:flex-row { flex-direction: row; }
  .md\:justify-start { justify-content: flex-start; }
}

/* Large Devices (992px and up) */
@media (min-width: 992px) {
  .container {
    max-width: var(--container-lg);
  }
  
  .lg\:block { display: block; }
  .lg\:hidden { display: none; }
  .lg\:grid-3 { grid-template-columns: var(--grid-cols-3); }
  .lg\:grid-4 { grid-template-columns: var(--grid-cols-4); }
  .lg\:flex-row { flex-direction: row; }
}

/* Extra Large Devices (1200px and up) */
@media (min-width: 1200px) {
  .container {
    max-width: var(--container-xl);
  }
  
  .xl\:block { display: block; }
  .xl\:hidden { display: none; }
  .xl\:grid-4 { grid-template-columns: var(--grid-cols-4); }
}

/* Extra Extra Large Devices (1400px and up) */
@media (min-width: 1400px) {
  .container {
    max-width: var(--container-xxl);
  }
  
  .xxl\:grid-4 { grid-template-columns: var(--grid-cols-4); }
}

/* ===== COMPONENT RESPONSIVE STYLES ===== */

/* Responsive Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: clamp(8px, 1vw, 16px);
  padding: var(--space-lg);
  box-shadow: 0 1px 3px var(--shadow-color);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-color);
}

/* Responsive Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: clamp(6px, 0.5vw, 10px);
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  min-height: 44px; /* Touch target size */
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-secondary);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-secondary:hover {
  background: var(--accent-primary);
  color: white;
}

/* Responsive Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  font-size: var(--fs-base);
  border: 1px solid var(--border-color);
  border-radius: clamp(4px, 0.5vw, 8px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all 0.3s ease;
  min-height: 44px; /* Touch target size */
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}

/* Responsive Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.nav-item {
  display: flex;
  align-items: center;
}

.nav-link {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-base);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: clamp(4px, 0.5vw, 8px);
  transition: all 0.3s ease;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-link:hover {
  background: var(--bg-secondary);
  color: var(--accent-primary);
}

/* Responsive Tables */
.table-container {
  overflow-x: auto;
  margin: var(--space-lg) 0;
}

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

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  font-weight: 600;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Responsive Images */
.img-responsive {
  max-width: 100%;
  height: auto;
  display: block;
}

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Responsive Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  z-index: 1000;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: clamp(8px, 1vw, 16px);
  padding: var(--space-2xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
}

/* ===== PRINT STYLES ===== */
@media print {
  .no-print {
    display: none !important;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

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

/* Focus styles for keyboard navigation */
*:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --shadow-color: rgba(0, 0, 0, 0.5);
  }
  
  [data-theme="dark"] {
    --border-color: #ffffff;
    --shadow-color: rgba(255, 255, 255, 0.3);
  }
}