/* ============================================================
   HHPoker Club - Shared Stylesheet
   Premium SaaS-Style Landing Page
   ============================================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
}

/* --- Smooth Scrolling --- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

/* --- Base Body --- */
body {
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--color-gray-800);
  background-color: #ffffff;
  overflow-x: hidden;
}

/* --- Selection --- */
::selection {
  background-color: var(--color-primary-100);
  color: var(--color-primary-700);
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}
::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* --- Glass Navbar --- */
.navbar-glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.5);
  transition: all 0.3s ease;
}
.navbar-glass.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

/* --- Nav Link --- */
.nav-link {
  position: relative;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: color 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary-600);
  border-radius: 9999px;
  transition: width 0.3s ease;
}
.nav-link:hover {
  color: var(--color-gray-900);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: var(--color-primary-600);
}

/* --- Button Styles --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
  border-radius: 9999px;
  box-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.35);
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px 0 rgba(79, 70, 229, 0.45);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-gray-700);
  background: #ffffff;
  border: 2px solid var(--color-gray-200);
  border-radius: 9999px;
  transition: all 0.3s ease;
  cursor: pointer;
  outline: none;
  text-decoration: none;
}
.btn-secondary:hover {
  border-color: var(--color-primary-300);
  color: var(--color-primary-600);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* --- Feature Card --- */
.feature-card {
  background: #ffffff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
}
.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  border-color: var(--color-primary-100);
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-primary-100));
  color: var(--color-primary-600);
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  transition: all 0.35s ease;
}
.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
  color: #ffffff;
  transform: scale(1.1);
}

/* --- Stat Item --- */
.stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary-600), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Testimonial Card --- */
.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  transition: all 0.3s ease;
}
.testimonial-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}
.stars {
  color: #f59e0b;
  letter-spacing: 2px;
}

/* --- FAQ Accordion --- */
.faq-item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.3s ease;
  background: #ffffff;
}
.faq-item:hover {
  border-color: var(--color-primary-200);
}
.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-gray-800);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--color-gray-400);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 1rem;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--color-primary-600);
}
.faq-item[open] summary {
  color: var(--color-primary-700);
  background: var(--color-primary-50);
}
.faq-item .faq-body {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-gray-600);
  line-height: 1.75;
}

/* --- Fade-in animation for scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Pulse animation --- */
@keyframes pulse-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4);
  }
  70% {
    box-shadow: 0 0 0 18px rgba(79, 70, 229, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0);
  }
}
.pulse-ring {
  animation: pulse-ring 2.5s infinite;
}

/* --- Float animation --- */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}
.float-anim {
  animation: float 4s ease-in-out infinite;
}

/* --- Gradient text --- */
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary-600), #7c3aed, #db2777);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Gradient border card --- */
.gradient-border-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-2xl);
}
.gradient-border-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-primary-300), #a78bfa, #f9a8d4);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* --- Download Step --- */
.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
  color: #ffffff;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* --- Club Card --- */
.club-card {
  background: #ffffff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.club-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-200);
}

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: linear-gradient(180deg, var(--color-primary-50) 0%, rgba(238, 242, 255, 0.2) 60%, #ffffff 100%);
  padding-top: 7rem;
  padding-bottom: 4rem;
}

/* --- Mobile menu --- */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.mobile-menu.open {
  max-height: 400px;
}

/* --- Platform card --- */
.platform-card {
  background: #ffffff;
  border: 2px solid var(--color-gray-100);
  border-radius: var(--radius-2xl);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
}
.platform-card:hover {
  border-color: var(--color-primary-400);
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
}

/* --- Footer --- */
.footer-link {
  color: var(--color-gray-400);
  transition: color 0.2s ease;
  text-decoration: none;
}
.footer-link:hover {
  color: #ffffff;
}

/* --- Responsive tweaks --- */
@media (max-width: 768px) {
  .stat-number {
    font-size: 2rem;
  }
  .btn-primary,
  .btn-secondary {
    padding: 0.75rem 1.5rem;
    font-size: 0.925rem;
  }
}