/* ============================================
   Club Simulator - Landing Page Styles
   Mobile-first, responsive, pure CSS
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #2E7D32;
  --color-primary-dark: #1B5E20;
  --color-primary-light: #4CAF50;
  --color-accent: #E65100;
  --color-accent-hover: #BF4400;
  --color-text: #212121;
  --color-text-light: #616161;
  --color-text-inverse: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7F5;
  --color-bg-dark: #1A1A2E;
  --color-bg-footer: #0F0F1A;
  --color-border: #E0E0E0;
  --color-card-shadow: rgba(0, 0, 0, 0.08);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.25rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  --max-width: 1200px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --transition: 0.2s ease;

  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

/* --- Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.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;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-2xl);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 111, 0, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-inverse);
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
  color: var(--color-text-inverse);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--font-size-lg);
}

/* --- Header / Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-primary-dark);
}

.logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-primary);
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  background-color: var(--color-primary);
  color: var(--color-text-inverse) !important;
  border-radius: var(--border-radius);
  font-weight: 600;
}

.nav-cta:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-text-inverse) !important;
}

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 999;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 0.75rem var(--spacing-sm);
  color: var(--color-text);
  font-weight: 500;
  border-radius: var(--border-radius);
}

.mobile-menu a:hover {
  background-color: var(--color-bg-alt);
}

.mobile-menu .nav-cta {
  display: block;
  text-align: center;
  margin-top: var(--spacing-xs);
  color: var(--color-text-inverse) !important;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213E 50%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  overflow: hidden;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.9);
}

.hero h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--spacing-sm);
}

.hero h1 span {
  display: block;
  background: linear-gradient(90deg, #81C784, #A5D6A7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: var(--font-size-lg);
  max-width: 580px;
  margin: 0 auto var(--spacing-lg);
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: #A5D6A7;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

/* --- About Section --- */
.about {
  padding: var(--spacing-3xl) 0;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  line-height: 1.8;
}

/* --- Features Section --- */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.feature-card {
  background-color: var(--color-bg);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-card-shadow);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(46, 125, 50, 0.1);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Screenshots Section --- */
.screenshots {
  padding: var(--spacing-3xl) 0;
}

.screenshots-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.screenshot-item {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 16px var(--color-card-shadow);
}

.screenshot-item img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background-color: #E8F5E9;
}

.screenshot-item figcaption {
  padding: 0.75rem var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-align: center;
  background-color: var(--color-bg);
}

/* --- How It Works Section --- */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg-alt);
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.step {
  text-align: center;
  padding: var(--spacing-lg);
}

.step-number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  font-size: var(--font-size-xl);
  font-weight: 800;
  border-radius: 50%;
}

.step h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.step p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  max-width: 300px;
  margin: 0 auto;
}

/* --- CTA Section --- */
.cta-section {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-text-inverse);
  text-align: center;
}

.cta-section h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.cta-section p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.85);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-lg);
}

.cta-section .btn-primary {
  background-color: var(--color-accent);
}

.cta-section .btn-primary:hover {
  background-color: var(--color-accent-hover);
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-bg-footer);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  color: var(--color-text-inverse);
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-width: 320px;
}

.footer-nav-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-inverse);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-nav a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer-nav a:hover {
  color: var(--color-text-inverse);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding-top: var(--spacing-lg);
  font-size: var(--font-size-sm);
  text-align: center;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
  color: var(--color-text-inverse);
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: calc(var(--header-height) + var(--spacing-sm)) 0 var(--spacing-sm);
  background-color: var(--color-bg-alt);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.breadcrumb-list a {
  color: var(--color-primary);
}

.breadcrumb-list .separator {
  color: var(--color-text-light);
}

/* --- Page Header (for subpages) --- */
.page-header {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-bg-alt);
  text-align: center;
}

.page-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xs);
}

.page-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Features Detail Page --- */
.features-detail {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.feature-detail-item {
  padding: var(--spacing-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.feature-detail-item:last-child {
  border-bottom: none;
}

.feature-detail-content {
  max-width: 720px;
}

.feature-detail-content h2 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.feature-detail-content h2 .feature-icon-inline {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(46, 125, 50, 0.1);
  border-radius: var(--border-radius);
  color: var(--color-primary);
  flex-shrink: 0;
}

.feature-detail-content h2 .feature-icon-inline svg {
  width: 20px;
  height: 20px;
}

.feature-detail-content p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.feature-detail-content p:last-child {
  margin-bottom: 0;
}

/* --- FAQ Page --- */
.faq-section {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--color-text-light);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding-bottom: var(--spacing-md);
}

.faq-answer p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* 480px+ */
@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

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

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

/* 768px+ */
@media (min-width: 768px) {
  :root {
    --font-size-2xl: 2.25rem;
    --font-size-3xl: 3rem;
    --font-size-4xl: 3.75rem;
  }

  .container {
    padding: 0 var(--spacing-lg);
  }

  .nav-links {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-menu {
    display: none !important;
  }

  .hero {
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
  }

  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .feature-detail-item {
    padding: var(--spacing-xl) 0;
  }
}

/* 1024px+ */
@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .hero h1 {
    font-size: var(--font-size-4xl);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }
}

/* ======== Language Selector ======== */

.lang-selector {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-selector-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 0.02em;
}

.lang-selector-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  box-shadow: 0 4px 12px var(--color-card-shadow);
  list-style: none;
  padding: 0.25rem 0;
  margin: 0;
  z-index: 100;
  min-width: 60px;
}

.lang-dropdown.open {
  display: block;
}

.lang-dropdown li a {
  display: block;
  padding: 0.35rem 0.75rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  transition: background 0.15s;
}

.lang-dropdown li a:hover {
  background: var(--color-bg-alt);
}

.lang-dropdown li a.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* Mobile language selector (inline links) */
.lang-selector-mobile {
  display: flex;
  gap: 0.25rem;
  padding: 0.5rem var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.lang-selector-mobile a {
  font-size: var(--font-size-sm) !important;
  font-weight: 500;
  color: var(--color-text-light) !important;
  padding: 0.25rem 0.5rem !important;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s;
}

.lang-selector-mobile a:hover {
  color: var(--color-primary) !important;
  border-color: var(--color-primary);
}

.lang-selector-mobile a.active {
  color: var(--color-primary) !important;
  border-color: var(--color-primary);
  font-weight: 600;
}

/* Hide mobile selector on desktop, hide desktop selector on mobile */
.lang-selector { display: none; }
.lang-selector-mobile { display: flex; }

@media (min-width: 768px) {
  .lang-selector { display: inline-flex; }
  .lang-selector-mobile { display: none; }
}

/* 1200px+ */
@media (min-width: 1200px) {
  .container {
    padding: 0 var(--spacing-xl);
  }

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