/* ============================================
   HCJK Collection - Main Stylesheet
   Core Styles and Layout
   ============================================ */

/* ==================== RESET & BASE ==================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-background);
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ==================== LAYOUT UTILITIES ==================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container-fluid {
  width: 100%;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section {
  padding: var(--section-padding) 0;
}

.section-sm {
  padding: var(--spacing-3xl) 0;
}

.section-lg {
  padding: var(--spacing-5xl) 0;
}

/* ==================== GRID SYSTEM ==================== */

.grid {
  display: grid;
  gap: var(--grid-gap);
}

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

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

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

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* ==================== FLEXBOX UTILITIES ==================== */

.flex {
  display: flex;
}

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

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

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

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

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

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

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

/* ==================== SPACING UTILITIES ==================== */

/* Margin */
.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.ml-0 { margin-left: 0; }
.mr-0 { margin-right: 0; }

.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Padding */
.p-0 { padding: 0; }
.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }
.pl-0 { padding-left: 0; }
.pr-0 { padding-right: 0; }

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

/* ==================== DISPLAY UTILITIES ==================== */

.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ==================== POSITION UTILITIES ==================== */

.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

/* ==================== OVERFLOW UTILITIES ==================== */

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

/* ==================== VISIBILITY UTILITIES ==================== */

.visible { visibility: visible; }
.invisible { visibility: hidden; }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

/* ==================== WIDTH & HEIGHT UTILITIES ==================== */

.w-100 { width: 100%; }
.w-auto { width: auto; }
.h-100 { height: 100%; }
.h-auto { height: auto; }

.min-h-screen { min-height: 100vh; }
.max-w-full { max-width: 100%; }

/* ==================== BACKGROUND UTILITIES ==================== */

.bg-white { background-color: var(--color-white); }
.bg-light { background-color: var(--color-light-gray); }
.bg-dark { background-color: var(--color-primary); }
.bg-accent { background-color: var(--color-accent); }

/* ==================== BORDER UTILITIES ==================== */

.border { border: var(--border-width-thin) solid var(--border-color-light); }
.border-top { border-top: var(--border-width-thin) solid var(--border-color-light); }
.border-bottom { border-bottom: var(--border-width-thin) solid var(--border-color-light); }
.border-left { border-left: var(--border-width-thin) solid var(--border-color-light); }
.border-right { border-right: var(--border-width-thin) solid var(--border-color-light); }

.border-none { border: none; }

.rounded { border-radius: var(--border-radius-md); }
.rounded-sm { border-radius: var(--border-radius-sm); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-full { border-radius: var(--border-radius-full); }

/* ==================== SHADOW UTILITIES ==================== */

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-luxury { box-shadow: var(--shadow-luxury); }
.shadow-none { box-shadow: none; }

/* ==================== IMAGE UTILITIES ==================== */

.img-fluid {
  max-width: 100%;
  height: auto;
}

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

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

.img-grayscale {
  filter: grayscale(100%);
  transition: filter var(--transition-base) var(--ease-in-out);
}

.img-grayscale:hover {
  filter: grayscale(0%);
}

/* ==================== ASPECT RATIO ==================== */

.aspect-ratio {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.aspect-ratio::before {
  content: '';
  display: block;
  padding-bottom: 100%; /* Default 1:1 */
}

.aspect-ratio > * {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.aspect-ratio-16-9::before { padding-bottom: 56.25%; }
.aspect-ratio-4-3::before { padding-bottom: 75%; }
.aspect-ratio-3-2::before { padding-bottom: 66.67%; }
.aspect-ratio-2-3::before { padding-bottom: 150%; }
.aspect-ratio-1-1::before { padding-bottom: 100%; }

/* ==================== OVERLAY ==================== */

.overlay {
  position: relative;
}

.overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--overlay-dark);
  z-index: 1;
  transition: var(--transition-opacity);
}

.overlay-light::before {
  background-color: var(--overlay-light);
}

.overlay-accent::before {
  background-color: var(--overlay-accent);
}

.overlay > * {
  position: relative;
  z-index: 2;
}

.overlay:hover::before {
  opacity: 0.6;
}

/* ==================== ANIMATIONS ==================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn var(--transition-slow) var(--ease-in-out);
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) var(--ease-luxury);
}

.animate-fade-in-down {
  animation: fadeInDown var(--transition-slow) var(--ease-luxury);
}

.animate-slide-in-left {
  animation: slideInLeft var(--transition-slow) var(--ease-luxury);
}

.animate-slide-in-right {
  animation: slideInRight var(--transition-slow) var(--ease-luxury);
}

.animate-scale-in {
  animation: scaleIn var(--transition-slow) var(--ease-luxury);
}

/* ==================== SCROLL ANIMATIONS ==================== */

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow) var(--ease-luxury),
              transform var(--transition-slow) var(--ease-luxury);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ==================== LOADING STATES ==================== */

.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.6;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-accent);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

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

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

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

/* Mobile First Breakpoints */
@media (max-width: 640px) {
  .container {
    padding-left: var(--container-padding-mobile);
    padding-right: var(--container-padding-mobile);
  }
  
  .section {
    padding: var(--section-padding-mobile) 0;
  }
  
  .grid {
    gap: var(--grid-gap-mobile);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .d-sm-none { display: none; }
  .d-sm-block { display: block; }
}

@media (min-width: 641px) and (max-width: 768px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .d-md-none { display: none; }
  .d-md-block { display: block; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .d-lg-none { display: none; }
  .d-lg-block { display: block; }
}

@media (min-width: 1025px) {
  .d-xl-none { display: none; }
  .d-xl-block { display: block; }
}

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

@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    background: white;
  }
  
  .container {
    max-width: 100%;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
  }
}

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

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