/* ==========================================================================
   AuditHub Landing Page - Utilities CSS
   Buttons, Grids, Cards, and Helper Classes
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.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-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* White Button (for dark backgrounds) */
.btn-white {
  background-color: var(--color-bg-white);
  color: var(--color-primary);
  border-color: var(--color-bg-white);
}

.btn-white:hover {
  background-color: var(--color-bg-light);
  border-color: var(--color-bg-light);
}

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

.btn-ghost:hover {
  background-color: var(--color-bg-light);
}

/* 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);
}

/* Full Width Button */
.btn-full {
  width: 100%;
}

/* Button with Icon */
.btn svg,
.btn .icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-sm svg,
.btn-sm .icon {
  width: 16px;
  height: 16px;
}

.btn-lg svg,
.btn-lg .icon {
  width: 24px;
  height: 24px;
}

/* --------------------------------------------------------------------------
   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);
}

/* Auto-fit grids */
.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Gap Variations */
.gap-4 {
  gap: var(--spacing-4);
}

.gap-8 {
  gap: var(--spacing-8);
}

.gap-10 {
  gap: var(--spacing-10);
}

.gap-12 {
  gap: var(--spacing-12);
}

/* Responsive Grid */
@media (max-width: 1023px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 767px) {
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid {
    gap: var(--spacing-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;
}

.flex-1 {
  flex: 1;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.card-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-border-dark);
}

.card-shadow {
  box-shadow: var(--shadow-md);
  border: none;
}

.card-lg {
  padding: var(--spacing-8);
}

.card-sm {
  padding: var(--spacing-4);
}

/* Card with Icon */
.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-4);
  color: var(--color-primary);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-icon-lg {
  width: 64px;
  height: 64px;
}

.card-icon-lg svg {
  width: 32px;
  height: 32px;
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
  color: var(--color-text);
}

.card-description {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

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

.mt-0 { margin-top: 0; }
.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); }
.mt-10 { margin-top: var(--spacing-10); }
.mt-12 { margin-top: var(--spacing-12); }

.mb-0 { margin-bottom: 0; }
.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); }
.mb-10 { margin-bottom: var(--spacing-10); }
.mb-12 { margin-bottom: var(--spacing-12); }

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

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.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); }

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

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */
.link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-weight: var(--font-weight-medium);
}

.link-arrow svg,
.link-arrow::after {
  transition: transform var(--transition-fast);
}

.link-arrow:hover svg,
.link-arrow:hover::after {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Badges / Tags
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background-color: #ECFDF3;
  color: var(--color-success);
}

.badge-warning {
  background-color: #FFFAEB;
  color: var(--color-warning);
}

.badge-info {
  background-color: #EFF8FF;
  color: var(--color-info);
}

/* --------------------------------------------------------------------------
   Dividers
   -------------------------------------------------------------------------- */
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--spacing-8) 0;
}

.divider-vertical {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
}

/* --------------------------------------------------------------------------
   Images / Media
   -------------------------------------------------------------------------- */
.img-rounded {
  border-radius: var(--radius-lg);
}

.img-shadow {
  box-shadow: var(--shadow-xl);
}

.img-placeholder {
  background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-border-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */
.list-check {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.list-check li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
}

.list-check li::before {
  content: '';
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-color: var(--color-success);
  border-radius: var(--radius-full);
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-size: 14px;
  background-position: center;
  background-repeat: no-repeat;
}

/* --------------------------------------------------------------------------
   Width Utilities
   -------------------------------------------------------------------------- */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }

/* --------------------------------------------------------------------------
   Display Utilities
   -------------------------------------------------------------------------- */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }

/* Responsive Display */
@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}

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

@media (max-width: 1023px) {
  .hide-tablet { display: none !important; }
}

@media (min-width: 1024px) {
  .show-tablet { display: none !important; }
}

/* --------------------------------------------------------------------------
   Animation Classes
   -------------------------------------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Stagger delays for grid children */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children > *:nth-child(6) { transition-delay: 500ms; }

/* --------------------------------------------------------------------------
   Form Elements (Basic)
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-4);
}

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

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

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

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

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-1);
}

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