/* Common Styles - Light & Professional Theme */

/* Page Load Animation */
body {
  opacity: 0;
  transition: opacity 0.5s ease;
  overflow-x: hidden;
}

body.page-loaded {
  opacity: 1;
}

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

.container-wide {
  max-width: 1600px;
}

.container-narrow {
  max-width: 1200px;
}

.container-text {
  max-width: 800px;
}

/* Section */
.section {
  padding: var(--section-padding-y) 0;
  background: var(--color-bg-primary);
}

.section-secondary {
  background: var(--color-bg-light);
}

.section-fullscreen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--color-accent-primary);
  border-radius: 50px;
  color: var(--color-accent-primary);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 16px;
  text-align: center;
}

.section-description {
  max-width: 800px;
  margin: 0 auto;
  font-size: var(--font-size-body-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-body);
  word-break: keep-all;
}

/* Typography */
h1, .h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

h2, .h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

h3, .h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-heading);
  color: var(--color-text-primary);
}

h4, .h4 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  color: var(--color-text-primary);
}

.lead {
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-body);
  color: var(--color-text-secondary);
}

.text-primary {
  color: var(--color-accent-primary);
}

.text-gold {
  color: var(--color-accent-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.t-left {
  text-align: left;
}

/* Grid */
.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);
}

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

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

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

/* Utilities */
.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;
}

/* Animation classes - with fallback for immediate visibility */
.fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.will-animate {
  opacity: 0;
  transform: translateY(50px);
}

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

/* Fallback: Show elements after 100ms if animation doesn't trigger */
.fade-in.will-animate {
  animation: fadeInFallback 0.1s ease 0.1s forwards;
}

@keyframes fadeInFallback {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scale-in.will-animate {
  opacity: 0;
  transform: scale(0.8);
}

.scale-in.active {
  opacity: 1;
  transform: scale(1);
}

.pc-content-image {
  display: block;
}

.mobile-content {
  display: none;
}

/* Fallback: Show elements after 100ms if animation doesn't trigger */
.scale-in.will-animate {
  animation: scaleInFallback 0.1s ease 0.1s forwards;
}

@keyframes scaleInFallback {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

*:focus:not(:focus-visible) {
  outline: none;
}

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

/* Accessibility: Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in.will-animate,
  .scale-in.will-animate {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .container {
    padding: 0 40px;
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 20px;
  }
  
  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 28px;
  }

  .section-description {
    font-size: 16px;
  }

  .section-description br {
    display: none;
  }

  .pc-content-image {
    display: none;
  }

  .mobile-content {
    display: flex;
  }
}


/* Top Button */
.top-button {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-line-regular);
  border-radius: 50%;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.top-button.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.top-button:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: #fff;
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.top-button svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .top-button {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
  }
  
  .top-button svg {
    width: 20px;
    height: 20px;
  }
}