/* ==========================================================================
   Design System - Mongoldip
   Additive design tokens & utility/component classes layered on top of
   Bootstrap 4 / MDB / style.css. Loaded after style.css so utilities here
   can override where needed.
   ========================================================================== */

:root {
  /* Color system */
  --color-brand-dark: #283e4a;
  --color-brand-dark-rgb: 40, 62, 74;
  --color-brand-darker: #1c2c35;
  --color-brand-light: #3d5a6c;

  --color-accent: #e8762a;
  --color-accent-dark: #c9601a;
  --color-accent-rgb: 232, 118, 42;

  --color-primary: #0071B9;
  --color-primary-dark: #00568c;

  --color-teal: #009688;
  --color-teal-light: #e0f5f3;

  --color-surface: #ffffff;
  --color-surface-alt: #f7f8f9;
  --color-surface-muted: #eef1f3;

  --color-text: #20303a;
  --color-text-on-dark: #f5f7f8;
  --color-text-muted: #5d6d77;

  --color-border: #dfe3e6;
  --color-success: #2e7d32;
  --color-danger: #c62828;

  /* Spacing scale (fluid) */
  --space-xs:  clamp(0.25rem, 0.2rem + 0.25vw, 0.5rem);
  --space-sm:  clamp(0.5rem, 0.4rem + 0.5vw, 1rem);
  --space-md:  clamp(1rem, 0.8rem + 1vw, 1.75rem);
  --space-lg:  clamp(1.5rem, 1.2rem + 1.5vw, 2.75rem);
  --space-xl:  clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
  --space-2xl: clamp(4rem, 3rem + 4vw, 7rem);

  /* Fluid typography */
  --font-size-sm:   clamp(0.8125rem, 0.78rem + 0.15vw, 0.9375rem);
  --font-size-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --font-size-lg:   clamp(1.125rem, 1.05rem + 0.35vw, 1.375rem);
  --font-size-xl:   clamp(1.5rem, 1.3rem + 0.9vw, 2.25rem);
  --font-size-2xl:  clamp(2rem, 1.6rem + 1.8vw, 3.5rem);

  /* Fonts */
  --font-bengali: 'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
  --font-latin-heading: 'Poppins', 'Hind Siliguri', sans-serif;
  --font-base: var(--font-bengali), var(--font-latin-heading);

  /* Radii / shadows / motion */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, .10);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, .14);
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 450ms ease;

  /* Glass surface tokens */
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.35);
  --glass-blur: 12px;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -48px;
  left: 0;
  z-index: 2000;
  background: var(--color-brand-dark);
  color: var(--color-text-on-dark);
  padding: var(--space-xs) var(--space-md);
  border-radius: 0 0 var(--radius-sm) 0;
  font-family: var(--font-base);
  font-size: var(--font-size-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  color: var(--color-text-on-dark);
  text-decoration: none;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .animated {
    animation: none !important;
  }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn-modern {
  display: inline-block;
  font-family: var(--font-base);
  font-weight: 600;
  font-size: var(--font-size-sm);
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  border: 2px solid var(--color-brand-dark);
  color: var(--color-brand-dark);
  background: transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-modern:hover,
.btn-modern:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  background-color: var(--color-brand-dark);
  color: var(--color-text-on-dark);
}

.btn-modern--accent {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.btn-modern--accent:hover,
.btn-modern--accent:focus {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn-modern--outline {
  border-color: var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface);
}

.btn-modern--outline:hover,
.btn-modern--outline:focus {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
  background: var(--color-surface);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Surfaces
   ========================================================================== */

.card-modern {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.glass-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  box-shadow: var(--shadow-lg);
}

.section-heading {
  font-family: var(--font-latin-heading);
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-brand-dark);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-header-accent th {
  background-color: var(--color-teal-light);
  color: var(--color-text);
  font-weight: 600;
}

/* ==========================================================================
   DataTables chrome
   ========================================================================== */

.dataTables_wrapper .dataTables_filter input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-sm);
  margin-left: var(--space-xs);
  transition: border-color var(--transition-fast);
}

.dataTables_wrapper .dataTables_filter input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.dataTables_wrapper .dataTables_length select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-xs);
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
  border-radius: var(--radius-sm) !important;
  margin: 0 2px;
  border: 1px solid transparent !important;
  color: var(--color-text) !important;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  background: var(--color-teal-light) !important;
  border-color: var(--color-teal-light) !important;
  color: var(--color-text) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current,
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
  background: var(--color-brand-dark) !important;
  border-color: var(--color-brand-dark) !important;
  color: var(--color-text-on-dark) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.disabled,
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled:hover {
  color: var(--color-text-muted) !important;
  background: transparent !important;
}

.dataTables_wrapper .dt-buttons .btn,
.dt-buttons .btn {
  border-radius: var(--radius-sm);
  background-color: var(--color-brand-dark);
  border-color: var(--color-brand-dark);
  color: var(--color-text-on-dark);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.dataTables_wrapper .dt-buttons .btn:hover,
.dt-buttons .btn:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  transform: translateY(-1px);
}

.dataTables_wrapper .dataTables_info {
  color: var(--color-text-muted);
}

/* ==========================================================================
   Admin dashboard surfaces, forms & controls
   ========================================================================== */

._r_dashboard .card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

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

._r_dashboard .card-header {
  background-color: var(--color-teal-light);
  color: var(--color-text);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
}

._r_dashboard .btn-success,
._r_dashboard input[type="submit"].btn-primary,
._r_dashboard button[type="submit"].btn-primary,
._r_dashboard .btn-primary[type="submit"] {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

._r_dashboard .btn-success:hover,
._r_dashboard input[type="submit"].btn-primary:hover,
._r_dashboard button[type="submit"].btn-primary:hover,
._r_dashboard .btn-primary[type="submit"]:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* bootstrap-toggle active state */
.toggle.btn-primary,
.toggle-on.btn-primary {
  background-color: var(--color-teal) !important;
  border-color: var(--color-teal) !important;
  color: var(--color-text-on-dark) !important;
}