/**
 * Axioms of Strategy Games - Styles
 * 
 * A stunning card-based presentation with nested radius harmony
 * and sophisticated dark theme aesthetics.
 */

/**
 * Axioms of Strategy Games - Styles
 */

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

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

/* ============================================================================
 * BACKGROUND ATMOSPHERE - Page-specific decorative backgrounds
 * ============================================================================ */

.page-wrapper::before {
  content: '';
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(245, 158, 11, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 0% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.page-wrapper::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

[data-theme="light"] .page-wrapper::before {
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(245, 158, 11, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 0% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
}

[data-theme="light"] .page-wrapper::after {
  background-image: 
    linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
}

/* Layout handled by shared/layout.css */

/* ============================================================================
 * CONTENT CONTAINER OVERRIDE - Wider for card layout
 * ============================================================================ */

.site-layout__inner {
  max-width: 1400px;
}

/* ============================================================================
 * PAGE TITLE - Content header below site navigation
 * ============================================================================ */

.page-header {
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--font-size-28);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin: 0;
}

@media (max-width: 768px) {
  .page-title {
    font-size: var(--font-size-24);
  }
}

/* ============================================================================
 * CONCEPT CARD (Outermost Container)
 * ============================================================================ */

.concept-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-concept);
  padding: var(--radius-theme-gap);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.concept-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--color-theme-termination),
    var(--color-theme-information),
    var(--color-theme-agency),
    var(--color-theme-balance),
    var(--color-theme-progression),
    var(--color-theme-cognitive)
  );
  border-radius: var(--radius-concept) var(--radius-concept) 0 0;
}

/* Page header now uses shared component from components.css */

.concept-definition {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  margin: 0 var(--spacing-4) var(--spacing-6);
  border-left: 3px solid var(--color-primary);
}

.concept-definition p {
  font-size: var(--font-size-base);
  color: var(--color-text-2);
  line-height: var(--line-height-relaxed);
  font-style: italic;
}

.concept-definition strong {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  font-style: normal;
}

/* ============================================================================
 * THEMES GRID
 * ============================================================================ */

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--radius-theme-gap);
  padding: var(--spacing-4);
}

@media (max-width: 860px) {
  .themes-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================================
 * THEME CARD (Middle Container)
 * Nested radius: inner 20px + gap 16px = outer 36px (matches concept)
 * ============================================================================ */

.theme-card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-theme-inner);
  padding: var(--radius-axiom-gap);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-in-out);
}

.theme-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.theme-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: var(--radius-theme-inner) var(--radius-theme-inner) 0 0;
}

/* Theme color variants */
.theme-card--termination::before { background: var(--color-theme-termination); }
.theme-card--information::before { background: var(--color-theme-information); }
.theme-card--agency::before { background: var(--color-theme-agency); }
.theme-card--balance::before { background: var(--color-theme-balance); }
.theme-card--progression::before { background: var(--color-theme-progression); }
.theme-card--cognitive::before { background: var(--color-theme-cognitive); }

.theme-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
}

.theme-icon {
  display: flex;
  align-items: center;
  justify-content: bottom;
  flex-shrink: 0;
  width: var(--icon-size-16);
  height: var(--icon-size-16);
}

.theme-icon svg {
  width: var(--icon-size-16);
  height: var(--icon-size-16);
}

.theme-card--termination .theme-icon { color: var(--color-theme-termination); }
.theme-card--information .theme-icon { color: var(--color-theme-information); }
.theme-card--agency .theme-icon { color: var(--color-theme-agency); }
.theme-card--balance .theme-icon { color: var(--color-theme-balance); }
.theme-card--progression .theme-icon { color: var(--color-theme-progression); }
.theme-card--cognitive .theme-icon { color: var(--color-theme-cognitive); }

.theme-title {
  font-family: var(--font-body);
  font-size: var(--font-size-19);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-none);
}

.axioms-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

/* ============================================================================
 * AXIOM CARD (Innermost Container)
 * Nested radius: inner 8px (inside theme gap 12px = theme outer 20px)
 * ============================================================================ */

.axiom-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-axiom-inner);
  padding: var(--spacing-4);
  position: relative;
  transition: all var(--duration-fast) var(--ease-in-out);
  cursor: default;
}

.axiom-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border);
  transform: translateX(4px);
}

.axiom-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-2);
}

.axiom-number {
  flex-shrink: 0;
  display: flex;
  align-items: top;
  justify-content: center;
  width: var(--icon-size-16);
  height: var(--icon-size-16);
  font-size: var(--font-size-14);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-2);
  line-height: var(--line-height-none);
}

.axiom-title {
  font-size: var(--font-size-14);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  line-height: var(--line-height-none);
}

.axiom-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-2);
  line-height: var(--line-height-normal);
  padding-left: calc(var(--icon-size-16) + var(--spacing-2));
}

/* Axiom card hover accents based on parent theme */
.theme-card--termination .axiom-card:hover { border-left: 2px solid var(--color-theme-termination); }
.theme-card--information .axiom-card:hover { border-left: 2px solid var(--color-theme-information); }
.theme-card--agency .axiom-card:hover { border-left: 2px solid var(--color-theme-agency); }
.theme-card--balance .axiom-card:hover { border-left: 2px solid var(--color-theme-balance); }
.theme-card--progression .axiom-card:hover { border-left: 2px solid var(--color-theme-progression); }
.theme-card--cognitive .axiom-card:hover { border-left: 2px solid var(--color-theme-cognitive); }

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.concept-card {
  animation: scaleIn var(--duration-slow) var(--ease-out) forwards;
}

.theme-card {
  opacity: 0;
  animation: fadeInUp var(--duration-normal) var(--ease-out) forwards;
}

.theme-card:nth-child(1) { animation-delay: 100ms; }
.theme-card:nth-child(2) { animation-delay: 150ms; }
.theme-card:nth-child(3) { animation-delay: 200ms; }
.theme-card:nth-child(4) { animation-delay: 250ms; }
.theme-card:nth-child(5) { animation-delay: 300ms; }
.theme-card:nth-child(6) { animation-delay: 350ms; }

.axiom-card {
  opacity: 0;
  animation: fadeInUp var(--duration-fast) var(--ease-out) forwards;
}

.theme-card:nth-child(1) .axiom-card:nth-child(1) { animation-delay: 200ms; }
.theme-card:nth-child(1) .axiom-card:nth-child(2) { animation-delay: 250ms; }
.theme-card:nth-child(1) .axiom-card:nth-child(3) { animation-delay: 300ms; }
.theme-card:nth-child(2) .axiom-card:nth-child(1) { animation-delay: 250ms; }
.theme-card:nth-child(2) .axiom-card:nth-child(2) { animation-delay: 300ms; }
.theme-card:nth-child(3) .axiom-card:nth-child(1) { animation-delay: 300ms; }
.theme-card:nth-child(3) .axiom-card:nth-child(2) { animation-delay: 350ms; }
.theme-card:nth-child(3) .axiom-card:nth-child(3) { animation-delay: 400ms; }
.theme-card:nth-child(4) .axiom-card:nth-child(1) { animation-delay: 350ms; }
.theme-card:nth-child(4) .axiom-card:nth-child(2) { animation-delay: 400ms; }
.theme-card:nth-child(5) .axiom-card:nth-child(1) { animation-delay: 400ms; }
.theme-card:nth-child(5) .axiom-card:nth-child(2) { animation-delay: 450ms; }
.theme-card:nth-child(6) .axiom-card:nth-child(1) { animation-delay: 450ms; }
.theme-card:nth-child(6) .axiom-card:nth-child(2) { animation-delay: 500ms; }

/* ============================================================================
 * CONTINUE LINK
 * ============================================================================ */

.continue-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-6);
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-in-out);
}

.continue-link:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-primary);
}

.continue-link__text {
  font-size: var(--font-size-14);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.continue-link__icon {
  width: var(--icon-size-16);
  height: var(--icon-size-16);
  color: var(--color-text-2);
  transition: transform var(--duration-fast) var(--ease-in-out);
}

.continue-link:hover .continue-link__icon {
  transform: translateX(4px);
  color: var(--color-primary);
}

/* Footer handled by shared/layout.css */

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

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