/**
 * Trine Gameplay - Main Stylesheet
 * All classes use prefix: ui31-
 * @version 1.0.0
 */

/* CSS Variables */
:root {
  --ui31-primary: #36454F;
  --ui31-secondary: #808080;
  --ui31-dark: #0A0A0A;
  --ui31-accent: #DDA0DD;
  --ui31-light: #DCDCDC;
  --ui31-white: #FFFFFF;
  --ui31-border: #333333;
  --ui31-shadow: rgba(0, 0, 0, 0.3);
  --ui31-gradient: linear-gradient(135deg, #36454F 0%, #0A0A0A 100%);
  --ui31-accent-gradient: linear-gradient(135deg, #DDA0DD 0%, #BA55D3 100%);
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 1.6rem;
  line-height: 1.5;
  color: var(--ui31-light);
  background-color: var(--ui31-dark);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Container */
.ui31-container {
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding: 0 1rem;
}

.ui31-wrapper {
  padding: 2rem 0;
}

/* Header */
.ui31-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--ui31-dark);
  border-bottom: 1px solid var(--ui31-border);
  z-index: 1000;
  transition: transform 0.3s ease;
}

.ui31-header-hidden {
  transform: translateY(-100%);
}

.ui31-header-inner {
  max-width: 430px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  gap: 1rem;
}

.ui31-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--ui31-white);
}

.ui31-logo-icon {
  width: 2.4rem;
  height: 2.4rem;
  object-fit: contain;
}

.ui31-logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ui31-white);
}

.ui31-header-buttons {
  display: flex;
  gap: 0.5rem;
}

.ui31-btn {
  padding: 0.5rem 1rem;
  border-radius: 0.4rem;
  font-size: 1.2rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ui31-btn-primary {
  background: var(--ui31-accent-gradient);
  color: var(--ui31-dark);
}

.ui31-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(221, 160, 221, 0.4);
}

.ui31-btn-secondary {
  background: transparent;
  color: var(--ui31-accent);
  border: 2px solid var(--ui31-accent);
}

.ui31-btn-secondary:hover {
  background: var(--ui31-accent);
  color: var(--ui31-dark);
}

.ui31-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.ui31-menu-toggle span {
  display: block;
  width: 2rem;
  height: 0.2rem;
  background: var(--ui31-white);
  transition: all 0.3s ease;
}

/* Mobile Menu */
.ui31-mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.98);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.ui31-menu-open {
  transform: translateX(0);
}

.ui31-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--ui31-border);
}

.ui31-menu-close {
  background: none;
  border: none;
  color: var(--ui31-white);
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem;
}

.ui31-menu-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.ui31-menu-link {
  display: block;
  padding: 1rem;
  color: var(--ui31-light);
  text-decoration: none;
  font-size: 1.6rem;
  border-bottom: 1px solid var(--ui31-border);
  transition: all 0.3s ease;
}

.ui31-menu-link:hover {
  background: var(--ui31-primary);
  color: var(--ui31-accent);
  padding-left: 1.5rem;
}

.ui31-menu-overlay {
  display: none;
}

/* Carousel */
.ui31-carousel {
  position: relative;
  margin-top: 5.6rem;
  overflow: hidden;
  border-radius: 0.8rem;
}

.ui31-carousel-wrapper {
  position: relative;
  height: 0;
  padding-bottom: 56.25%;
}

.ui31-carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.ui31-carousel-slide.ui31-active {
  opacity: 1;
}

.ui31-carousel-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ui31-carousel-dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
}

.ui31-carousel-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.ui31-carousel-dot.ui31-active {
  background: var(--ui31-accent);
  transform: scale(1.2);
}

/* Typography */
h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--ui31-white);
  margin: 2rem 0 1rem;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--ui31-accent);
  margin: 2rem 0 1rem;
  line-height: 1.3;
}

h3 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--ui31-light);
  margin: 1.5rem 0 0.8rem;
}

p {
  margin-bottom: 1rem;
  color: var(--ui31-light);
}

a {
  color: var(--ui31-accent);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--ui31-white);
}

/* Game Grid */
.ui31-game-section {
  margin: 2rem 0;
}

.ui31-section-title {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--ui31-accent);
  margin: 1.5rem 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ui31-game-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
}

.ui31-game-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.ui31-game-item:hover {
  transform: scale(1.05);
}

.ui31-game-icon {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 0.4rem;
  background: var(--ui31-primary);
}

.ui31-game-name {
  font-size: 1rem;
  color: var(--ui31-light);
  text-align: center;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* Cards */
.ui31-card {
  background: var(--ui31-primary);
  border-radius: 0.8rem;
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: 0 4px 12px var(--ui31-shadow);
}

.ui31-card-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--ui31-accent);
  margin-bottom: 1rem;
}

/* Lists */
.ui31-list {
  list-style: none;
  margin: 1rem 0;
}

.ui31-list-item {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--ui31-border);
  color: var(--ui31-light);
}

.ui31-list-item:last-child {
  border-bottom: none;
}

.ui31-list-item strong {
  color: var(--ui31-accent);
}

/* Footer */
.ui31-footer {
  background: var(--ui31-primary);
  padding: 3rem 0 8rem;
  margin-top: 4rem;
  border-top: 1px solid var(--ui31-border);
}

.ui31-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.ui31-footer-link {
  padding: 0.5rem 1rem;
  background: var(--ui31-dark);
  border-radius: 0.4rem;
  color: var(--ui31-light);
  text-decoration: none;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.ui31-footer-link:hover {
  background: var(--ui31-accent);
  color: var(--ui31-dark);
}

.ui31-partners {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

.ui31-partner-logo {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all 0.3s ease;
}

.ui31-partner-logo:hover {
  filter: grayscale(0%);
  opacity: 1;
}

.ui31-copyright {
  text-align: center;
  color: var(--ui31-secondary);
  font-size: 1.2rem;
  margin-top: 2rem;
}

/* Bottom Navigation (Mobile) */
.ui31-bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ui31-dark);
  border-top: 2px solid var(--ui31-accent);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem 0;
  z-index: 1000;
  box-shadow: 0 -2px 10px var(--ui31-shadow);
}

.ui31-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  min-width: 60px;
  min-height: 60px;
  justify-content: center;
  text-decoration: none;
  color: var(--ui31-secondary);
  transition: all 0.3s ease;
  position: relative;
}

.ui31-nav-item:hover {
  color: var(--ui31-accent);
  transform: scale(1.05);
}

.ui31-nav-item.ui31-nav-active {
  color: var(--ui31-accent);
}

.ui31-nav-icon {
  font-size: 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ui31-nav-text {
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
}

/* Hide bottom nav on desktop */
@media (min-width: 769px) {
  .ui31-bottom-nav {
    display: none;
  }

  main {
    padding-bottom: 0;
  }
}

/* Add bottom padding for mobile */
@media (max-width: 768px) {
  main {
    padding-bottom: 80px;
  }
}

/* Responsive */
@media (max-width: 480px) {
  html {
    font-size: 56.25%;
  }

  .ui31-game-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Utility Classes */
.ui31-text-center {
  text-align: center;
}

.ui31-mt-1 { margin-top: 1rem; }
.ui31-mt-2 { margin-top: 2rem; }
.ui31-mt-3 { margin-top: 3rem; }

.ui31-mb-1 { margin-bottom: 1rem; }
.ui31-mb-2 { margin-bottom: 2rem; }
.ui31-mb-3 { margin-bottom: 3rem; }

.ui31-p-1 { padding: 1rem; }
.ui31-p-2 { padding: 2rem; }
.ui31-p-3 { padding: 3rem; }