/* ========================================
   HOAPOSTBOARD - Base Styles
   Desktop-First Responsive Design
   ======================================== */

/* ========================================
   CSS VARIABLES - Design System
   ======================================== */
:root {
  /* Brand Colors */
  --color-primary: #3b82f6;        /* Blue - primary actions */
  --color-primary-dark: #1e40af;   /* Darker blue - hover states */
  --color-primary-light: #60a5fa;  /* Light blue - accents */
  --color-secondary: #3b82f6;      /* Blue - secondary actions */
  --color-secondary-dark: #1e40af; /* Darker blue - hover */
  
  /* Status Colors */
  --color-success: #10b981;        /* Green - success states */
  --color-warning: #f59e0b;        /* Orange - warnings */
  --color-error: #ef4444;          /* Red - errors */
  --color-info: #3b82f6;           /* Blue - info messages */
  
  /* Neutral Colors */
  --color-text-primary: #1f2937;   /* Dark gray - main text */
  --color-text-secondary: #6b7280; /* Medium gray - secondary text */
  --color-text-light: #9ca3af;     /* Light gray - muted text */
  --color-border: #e5e7eb;         /* Border color */
  --color-divider: #f3f4f6;        /* Divider lines */
  --color-background: #ffffff;     /* White background */
  --color-background-alt: #f9fafb; /* Light gray background */
  --color-background-dark: #111827; /* Dark background for contrast */
  
  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'Courier New', Courier, monospace;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing Scale */
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;  /* Circular */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Layout */
  --max-width-container: 1280px;
  --max-width-content: 900px;
  --sidebar-width: 280px;
  --header-height: 64px;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background-alt);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Touch targets - ensure minimum 44px hit areas on mobile */
@media (max-width: 768px) {
  a, button, [role="button"], input[type="submit"], input[type="button"] {
    min-height: 44px;
  }
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-4);
}

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

p {
  margin-bottom: var(--spacing-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

strong, b {
  font-weight: var(--font-weight-semibold);
}

small {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  background-color: var(--color-background-alt);
  padding: 0.125rem 0.25rem;
  border-radius: var(--radius-sm);
}

/* ========================================
   LAYOUT COMPONENTS
   ======================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width-container);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.container-fluid {
  width: 100%;
  max-width: 100%;
  padding: 0 var(--spacing-6);
}

.container-narrow {
  max-width: var(--max-width-content);
}

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

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

/* ========================================
   CARD COMPONENT
   ======================================== */
.card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--color-divider);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 0;
}

.card-body {
  margin-bottom: var(--spacing-4);
}

.card-footer {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-divider);
  display: flex;
  gap: var(--spacing-3);
  justify-content: flex-end;
}

/* ========================================
   BUTTON COMPONENTS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  text-decoration: none;
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  text-decoration: none;
}

/* Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-background-alt);
  color: var(--color-text-primary);
  text-decoration: none;
}

/* Danger Button */
.btn-danger {
  background-color: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
  border-color: #dc2626;
  text-decoration: none;
}

/* Success Button */
.btn-success {
  background-color: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
  background-color: #059669;
  border-color: #059669;
  text-decoration: none;
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

.btn-block {
  display: flex;
  width: 100%;
}

/* Icon Button */
.btn-icon {
  padding: var(--spacing-3);
  aspect-ratio: 1;
}

/* ========================================
   FORM COMPONENTS
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

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

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-background-alt);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

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

/* Form Input States */
.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.success,
.form-select.success,
.form-textarea.success {
  border-color: var(--color-success);
}

.form-help {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-2);
}

.form-error {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--spacing-2);
}

.form-success {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-success);
  margin-top: var(--spacing-2);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.form-check-input {
  width: 1.125rem;
  height: 1.125rem;
  cursor: pointer;
}

.form-check-label {
  font-size: var(--font-size-base);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

/* Input Group */
.input-group {
  display: flex;
  gap: 0;
}

.input-group > .form-input {
  border-radius: 0;
}

.input-group > .form-input:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.input-group > .form-input:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.input-group > .btn {
  border-radius: 0;
}

.input-group > .btn:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

/* ========================================
   ALERT COMPONENTS
   ======================================== */
.alert {
  padding: var(--spacing-4) var(--spacing-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-4);
}

.alert-success {
  background-color: #d1fae5;
  border-color: #6ee7b7;
  color: #065f46;
}

.alert-error {
  background-color: #fee2e2;
  border-color: #fca5a5;
  color: #991b1b;
}

.alert-warning {
  background-color: #fef3c7;
  border-color: #fcd34d;
  color: #92400e;
}

.alert-info {
  background-color: #dbeafe;
  border-color: #93c5fd;
  color: #1e3a8a;
}

/* ========================================
   BADGE COMPONENT
   ======================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background-color: #dbeafe;
  color: var(--color-primary-dark);
}

.badge-success {
  background-color: #d1fae5;
  color: #065f46;
}

.badge-warning {
  background-color: #fef3c7;
  color: #92400e;
}

.badge-error {
  background-color: #fee2e2;
  color: #991b1b;
}

.badge-secondary {
  background-color: #f3f4f6;
  color: var(--color-text-secondary);
}

/* ========================================
   TABLE COMPONENT
   ======================================== */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-background);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table thead {
  background-color: var(--color-background-alt);
  border-bottom: 2px solid var(--color-border);
}

.table th {
  padding: var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-align: left;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table td {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-divider);
}

.table tbody tr:hover {
  background-color: var(--color-background-alt);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ========================================
   MODAL COMPONENT
   ======================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: none;
}

.modal-backdrop.active {
  display: block;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-background);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  display: none;
}

.modal.active {
  display: block;
}

.modal-header {
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-background-alt);
}

.modal-body {
  padding: var(--spacing-6);
}

.modal-footer {
  padding: var(--spacing-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  gap: var(--spacing-3);
  justify-content: flex-end;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.navbar-container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

.brand-name {
  font-weight: 800;
  letter-spacing: -0.5px;
  color: inherit;
}

.brand-separator {
  display: inline-block;
  width: 2px;
  height: 22px;
  background: currentColor;
  opacity: 0.25;
  margin: 0 0.25rem;
}

.brand-label {
  font-weight: 500;
  opacity: 0.7;
  font-size: 0.95em;
  transition: opacity 0.2s ease;
}

.navbar-brand:hover .brand-label {
  opacity: 0.9;
}

.navbar-nav {
  display: flex;
  gap: var(--spacing-6);
  list-style: none;
  align-items: center;
}

.navbar-link {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-primary);
  background-color: var(--color-background-alt);
  text-decoration: none;
}

/* Sidebar Navigation */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-background);
  border-right: 1px solid var(--color-border);
  height: calc(100vh - var(--header-height));
  position: fixed;
  top: var(--header-height);
  left: 0;
  overflow-y: auto;
  padding: var(--spacing-6);
}

.sidebar-nav {
  list-style: none;
}

.sidebar-item {
  margin-bottom: var(--spacing-2);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.sidebar-link:hover,
.sidebar-link.active {
  background-color: var(--color-background-alt);
  color: var(--color-primary);
  text-decoration: none;
}

.sidebar-link.active {
  background-color: #dbeafe;
}

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

/* Spacing */
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

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

.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

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

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-light); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

/* Font Weights */
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }

/* Visibility */
.invisible { visibility: hidden; }
.visible { visibility: visible; }

/* ========================================
   RESPONSIVE - TABLET (max-width: 1024px)
   ======================================== */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
  }
  
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  
  .container {
    padding: 0 var(--spacing-4);
  }
  
  .navbar-container {
    padding: 0 var(--spacing-4);
  }
  
  .sidebar {
    padding: var(--spacing-4);
  }
}

/* ========================================
   RESPONSIVE - MOBILE (max-width: 768px)
   ======================================== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 1.875rem;  /* 30px */
    --font-size-3xl: 1.5rem;    /* 24px */
    --font-size-2xl: 1.25rem;   /* 20px */
    --spacing-6: 1rem;          /* 16px */
    --spacing-8: 1.5rem;        /* 24px */
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 var(--spacing-4);
  }
  
  .card {
    padding: var(--spacing-4);
  }
  
  .btn {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
  }
  
  .btn-lg {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
  }
  
  .navbar-nav {
    gap: var(--spacing-3);
  }
  
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .modal {
    width: 95%;
    max-height: 95vh;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: var(--spacing-4);
  }
  
  .table {
    font-size: var(--font-size-sm);
  }
  
  .table th,
  .table td {
    padding: var(--spacing-3);
  }
}

/* ========================================
   RESPONSIVE - SMALL MOBILE (max-width: 480px)
   ======================================== */
@media (max-width: 480px) {
  :root {
    --spacing-4: 0.75rem;       /* 12px */
    --spacing-6: 0.875rem;      /* 14px */
  }
  
  .container {
    padding: 0 var(--spacing-3);
  }
  
  .navbar-container {
    padding: 0 var(--spacing-3);
  }
  
  .card {
    padding: var(--spacing-3);
    border-radius: var(--radius-md);
  }
  
  .btn {
    padding: var(--spacing-2) var(--spacing-3);
  }
  
  .form-input,
  .form-select,
  .form-textarea {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
  }
  
  .modal {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    border-radius: 0;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
  .navbar,
  .sidebar,
  .btn,
  .modal-backdrop,
  .modal {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}