/* ===========================
   DESIGN SYSTEM & TOKENS
   =========================== */

:root {
  /* Color Palette */
  --color-primary-teal: #00B4B3;
  --color-primary-coral: #FF6F61;
  --color-charcoal: #222222;
  --color-gray-light: #F3F3F3;
  --color-gray-medium: #999999;
  --color-gray-dark: #555555;
  --color-white: #FFFFFF;
  
  /* Typography */
  --font-primary: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-base: 1.6;
  --line-height-tight: 1.3;
  
  /* Spacing Scale (8px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Container */
  --container-max-width: 1000px;
  --container-padding: clamp(var(--space-md), 3vw, var(--space-lg));
}

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

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-charcoal);
  background-color: var(--color-white);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  margin: var(--space-lg) 0 var(--space-md);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
}

h1 { font-size: clamp(1.5rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 4vw, 2rem); }
h3 { font-size: clamp(1.1rem, 3vw, 1.5rem); }
h4, h5, h6 { font-size: 1rem; }

p {
  margin: var(--space-md) 0;
}

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

a:hover, a:focus {
  color: var(--color-charcoal);
  text-decoration: underline;
  outline: none;
}

ul, ol {
  margin: var(--space-md) 0;
  padding-left: 1.5rem;
}

li {
  margin: var(--space-sm) 0;
}

/* ===========================
   LAYOUT COMPONENTS
   =========================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */

header {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

header .container {
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
}

.badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-primary-teal);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
}

.header-register-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-coral);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.header-register-btn:hover,
.header-register-btn:focus {
  background-color: #e55a4a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

nav[aria-label="Primary navigation"] {
  margin-top: var(--space-md);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}

nav[aria-label="Primary navigation"] a {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  margin-right: var(--space-xs);
  border-radius: var(--radius-lg);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  white-space: nowrap;
  transition: background-color var(--transition-fast), text-decoration var(--transition-fast);
}

nav[aria-label="Primary navigation"] a:hover,
nav[aria-label="Primary navigation"] a:focus {
  background-color: rgba(255, 255, 255, 0.16);
  text-decoration: none;
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.1)), url('./images/hero-volleyball-action.jpg') center / cover;
  background-attachment: fixed;
  color: var(--color-white);
  padding: var(--space-3xl) var(--container-padding);
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 4px solid var(--color-primary-coral);
}

@media (max-width: 768px) {
  .hero {
    background-attachment: scroll;
    min-height: 300px;
    padding: var(--space-2xl) var(--container-padding);
  }
}

.hero-content {
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--container-padding);
}

.hero h2 {
  color: var(--color-white);
  font-size: clamp(1.5rem, 6vw, 2.5rem);
  margin-bottom: var(--space-md);
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: clamp(1rem, 2vw, 1.125rem);
  max-width: 600px;
  line-height: var(--line-height-base);
}

.hero-tagline {
  color: var(--color-charcoal);
  font-size: clamp(0.95rem, 1.5vw, 1rem);
  margin-top: var(--space-lg) !important;
  font-style: italic;
  max-width: 600px;
  background-color: var(--color-primary-teal);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
}

/* ===========================
   AT A GLANCE SECTION
   =========================== */

#at-a-glance {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  padding: var(--space-2xl) 0;
}

.glance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  text-align: center;
}

.glance-item h3 {
  margin-bottom: var(--space-md);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
}

.glance-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-base);
}

/* ===========================
   HOW TO JOIN SECTION
   =========================== */

.steps {
  counter-reset: step-counter;
  list-style: none;
  padding: 0;
  margin: var(--space-xl) 0;
  max-width: 700px;
}

.steps li {
  position: relative;
  padding-left: var(--space-2xl);
  margin: var(--space-lg) 0;
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
}

.steps li::before {
  content: counter(step-counter);
  counter-increment: step-counter;
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--color-primary-coral);
  color: var(--color-white);
  border-radius: 50%;
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
}

/* ===========================
   FOOTER ACCESSIBILITY
   =========================== */

.footer-accessibility {
  background-color: rgba(0, 180, 179, 0.1);
  padding: var(--space-lg) var(--container-padding);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  text-align: center;
}

.footer-accessibility p {
  margin: 0;
  color: var(--color-white);
  font-size: var(--font-size-base);
}

.footer-accessibility a {
  color: var(--color-primary-teal);
  font-weight: var(--font-weight-semibold);
  text-decoration: underline;
}

.footer-accessibility a:hover {
  color: var(--color-white);
}

/* ===========================
   SECTIONS
   =========================== */

main {
  background-color: var(--color-white);
}

section {
  padding: var(--space-2xl) 0;
}

section.alt {
  background-color: var(--color-gray-light);
}

section:last-of-type {
  border-bottom: none;
}

.section-subtitle {
  color: var(--color-gray-dark);
  font-size: var(--font-size-lg);
  margin-top: 0;
  margin-bottom: var(--space-lg);
}

/* ===========================
   BUTTONS & CTAs
   =========================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-coral);
  color: var(--color-white);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:hover, .btn:focus {
  background-color: #e55a4a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  outline: none;
}

.btn.secondary {
  background-color: var(--color-primary-teal);
}

.btn.secondary:hover, .btn.secondary:focus {
  background-color: #009a99;
}

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

.btn.outline:hover, .btn.outline:focus {
  background-color: var(--color-primary-coral);
  color: var(--color-white);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* ===========================
   CARDS & GRID LAYOUTS
   =========================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-lg) 0;
}

.card {
  background-color: var(--color-white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

section.alt .card {
  background-color: var(--color-white);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary-teal);
}

.card p {
  margin-bottom: 0;
  color: var(--color-gray-dark);
}

/* ===========================
   VALUE CARDS SPECIFIC STYLING
   =========================== */

.value-card {
  border-left: 4px solid;
  position: relative;
  overflow: hidden;
}

.value-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: block;
}

.value-card h3 {
  margin-top: 0;
  color: var(--color-charcoal);
  font-size: 1.1rem;
}

.value-card p {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-base);
}

/* Color variants for each value card */
.value-card-1 { border-left-color: var(--color-primary-teal); }
.value-card-2 { border-left-color: var(--color-primary-coral); }
.value-card-3 { border-left-color: #FF9A56; }
.value-card-4 { border-left-color: var(--color-primary-teal); }
.value-card-5 { border-left-color: var(--color-primary-coral); }
.value-card-6 { border-left-color: #FF9A56; }
.value-card-7 { border-left-color: var(--color-primary-teal); }
.value-card-8 { border-left-color: var(--color-primary-coral); }
.value-card-9 { border-left-color: #FF9A56; }
.value-card-10 { border-left-color: var(--color-primary-teal); }

/* Enhanced hover effect for value cards */
.value-card:hover {
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-6px);
}

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

.text-muted {
  color: var(--color-gray-dark);
}

.text-subtle {
  color: var(--color-gray-medium);
  font-size: var(--font-size-sm);
}

.text-small {
  font-size: var(--font-size-sm);
}

.text-highlight {
  color: var(--color-primary-coral);
  font-weight: var(--font-weight-semibold);
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

/* ===========================
   FOOTER
   =========================== */

footer {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  padding: var(--space-2xl) 0;
  border-top: 4px solid var(--color-primary-coral);
}

footer a {
  color: var(--color-white);
  text-decoration: underline;
}

footer a:hover, footer a:focus {
  color: var(--color-primary-teal);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-section h3 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin: 0 0 var(--space-md);
}

.footer-section p {
  margin: var(--space-sm) 0;
  font-size: var(--font-size-sm);
}

.footer-divider {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
}

/* ===========================
   ACCESSIBILITY
   =========================== */

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--space-md);
  background-color: var(--color-primary-coral);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  z-index: 1000;
}

/* Focus visible for better keyboard navigation */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--color-primary-coral);
  outline-offset: 2px;
}

input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--color-primary-teal);
  outline-offset: 2px;
}

.btn:focus-visible {
  outline: 3px solid var(--color-white);
  outline-offset: 2px;
}

/* ===========================
   MOBILE MENU
   =========================== */

.menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  gap: var(--space-xs);
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle:hover span {
  background-color: var(--color-primary-teal);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.header-nav {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-md);
}

.header-nav a {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  margin-right: var(--space-xs);
  border-radius: var(--radius-lg);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  white-space: nowrap;
  transition: background-color var(--transition-fast), text-decoration var(--transition-fast);
}

.header-nav a:hover,
.header-nav a:focus {
  background-color: rgba(255, 255, 255, 0.16);
  text-decoration: none;
}

.header-nav .header-register-btn {
  margin-right: 0;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-charcoal);
    padding: 0;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
    align-items: stretch;
  }

  .header-nav.active {
    max-height: 500px;
    padding: var(--space-md) var(--container-padding);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .header-nav a {
    padding: var(--space-md);
    margin-right: 0;
    border-radius: 0;
    background-color: transparent;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .header-nav a:last-child {
    border-bottom: none;
  }

  .header-nav a:hover,
  .header-nav a:focus {
    background-color: rgba(255, 255, 255, 0.08);
  }

  .header-nav .header-register-btn {
    background-color: var(--color-primary-coral);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    margin-top: var(--space-sm);
  }

  .header-nav .header-register-btn:hover,
  .header-nav .header-register-btn:focus {
    background-color: #e55a4a;
  }

  header .container {
    position: relative;
  }
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 768px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.1rem; }
  
  .header-top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .glance-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .steps li {
    padding-left: var(--space-xl);
  }
  
  .steps li::before {
    width: 2rem;
    height: 2rem;
    font-size: 0.9rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  section {
    padding: var(--space-xl) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}