/* ==========================================================================
   BTTC TAEKWONDO - MAIN STYLESHEET
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Montserrat:wght@700;800;900&display=swap');

/* --- Custom Variables --- */
:root {
  --color-bg-base: #0A0A0A;
  --color-bg-surface: #141414;
  --color-bg-surface-light: #222222;
  --color-accent-primary: #D00000;
  --color-accent-hover: #A00000;
  --color-accent-glow: rgba(208, 0, 0, 0.4);
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #A0A0A0;
  
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;
  
  --max-width-container: 1200px;

  /* --- Belt Rank Colors --- */
  --belt-white: #ffffff;
  --belt-white-yellow: linear-gradient(135deg, #ffffff 50%, #ffcc00 50%);
  --belt-yellow: #ffcc00;
  --belt-yellow-green: linear-gradient(135deg, #ffcc00 50%, #27ae60 50%);
  --belt-green: #27ae60;
  --belt-green-blue: linear-gradient(135deg, #27ae60 50%, #2980b9 50%);
  --belt-blue: #2980b9;
  --belt-blue-red: linear-gradient(135deg, #2980b9 50%, #c0392b 50%);
  --belt-red: #c0392b;
  --belt-red-black: linear-gradient(135deg, #c0392b 50%, #111111 50%);
  --belt-black: #111111;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: 1px;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 900;
}

h2 {
  font-size: clamp(2rem, 3vw, 3.5rem);
  font-weight: 800;
}

h3 {
  font-size: 1.5rem;
  font-weight: 700;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

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

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

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

.section-padding {
  padding: var(--spacing-xl) 0;
}

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

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  padding: 1rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
  letter-spacing: 1px;
  border: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-accent-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(255, 0, 0, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(5px);
}

.btn-outline:hover {
  background-color: var(--color-text-primary);
  color: var(--color-bg-base);
  border-color: var(--color-text-primary);
  transform: translateY(-3px);
}

.glow-on-hover:hover {
  box-shadow: 0 0 15px var(--color-accent-glow);
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  z-index: 1000;
  transition: all var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-accent-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-bg-surface);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  border-top: 1px solid rgba(255, 0, 0, 0.1);
}

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

.footer-col h4 {
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-col p, .footer-col li {
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a:hover {
  color: var(--color-accent-primary);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.admin-link {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  opacity: 0.5;
}
.admin-link:hover {
  color: var(--color-accent-primary);
  opacity: 1;
}

/* Footer Social Icons */
.footer-social {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: var(--color-bg-surface-light);
    color: #fff;
    border-radius: 50%;
    font-size: 1.2rem;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.social-icon:hover {
    background-color: var(--color-accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(255, 0, 0, 0.3);
}

.social-icon[data-platform="youtube"]:hover { background-color: #FF0000; }
.social-icon[data-platform="instagram"]:hover { background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%); }
.social-icon[data-platform="facebook"]:hover { background-color: #1877F2; }
.social-icon[data-platform="tiktok"]:hover { background-color: #000000; }

/* --- Media Queries --- */
/* --- Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.pulse {
  animation: pulse 2s infinite ease-in-out;
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background-color: var(--color-bg-surface);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: right var(--transition-normal);
    box-shadow: -5px 0 15px rgba(0,0,0,0.5);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .mobile-menu-btn {
    display: block;
    z-index: 1001;
  }
  
  .section-padding {
    padding: var(--spacing-lg) 0;
  }
}