:root {
  --color-bg: #0d0d0d;
  --color-primary: #ffcc00;
  --color-secondary: #1a1a1a;
  --color-accent: #e6b800;
  --color-text: #ffffff;
  --color-muted: #cccccc;
  --color-success: #2ed573;
  --color-warning: #ffa502;
  --color-error: #ff3838;
  --color-info: #3742fa;
  --color-bonus: #ff6b35;
  --color-vip: #8e44ad;
  --font-main: 'Roboto', sans-serif;
  --font-alt: 'Exo 2', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
}

/* Header Styles */
header {
  background: var(--color-secondary);
  padding: 25px 20px;
  text-align: center;
  position: relative;
  border-bottom: 3px solid var(--color-primary);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

header h1 {
  font-family: var(--font-alt);
  font-size: 2.5rem;
  color: var(--color-primary);
}

.burger {
  display: none;
  cursor: pointer;
  position: absolute;
  left: 20px;
  top: 25px;
  flex-direction: column;
  gap: 5px;
  z-index: 1001;
}

.burger div {
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  transition: all 0.3s ease;
}

.burger.toggle .line1 {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.burger.toggle .line2 {
  opacity: 0;
}

.burger.toggle .line3 {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Navigation Styles */
nav {
  background: #111;
  padding: 15px 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  border-bottom: 1px solid #2a2a2a;
  font-family: var(--font-alt);
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: color 0.3s ease;
  position: relative;
}

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

nav a:hover::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

/* Auth Buttons */
.auth-buttons {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 10px;
  z-index: 1000;
}

.auth-buttons a {
  padding: 8px 14px;
  font-size: 0.95rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
}

.login-btn {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.login-btn:hover {
  background-color: var(--color-primary);
  color: #000;
}

.register-btn {
  background-color: var(--color-primary);
  color: #000;
}

.register-btn:hover {
  background-color: var(--color-accent);
}

/* Logo Styles */
.logo {
  display: block;
  text-align: center;
  max-width: 220px;
  margin: 0 auto;
}

.logo img {
  width: 100%;
  height: auto;
  display: block;
  max-width: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.logo img:hover {
  transform: scale(1.03);
}

/* Main Content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 20px;
  width: 100%;
}

section {
  margin-bottom: 60px;
  padding: 0 10px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-alt);
  color: var(--color-primary);
  margin-bottom: 20px;
}

h1 {
  font-size: 2.5rem;
  text-align: center;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

p {
  margin-bottom: 20px;
  font-size: 1.1rem;
  color: var(--color-muted);
  text-align: justify;
  word-break: break-word;
}

ul, ol {
  margin-bottom: 20px;
  padding-left: 30px;
  color: var(--color-muted);
}

li {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 25px;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  text-align: center;
  font-family: var(--font-alt);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #000;
  box-shadow: 0 4px 15px rgba(255, 204, 0, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 204, 0, 0.4);
}

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: #000;
}

.btn-success {
  background: linear-gradient(135deg, var(--color-success), #27ae60);
  color: white;
  box-shadow: 0 4px 15px rgba(46, 213, 115, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, #27ae60, var(--color-success));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 213, 115, 0.4);
}

/* Cards */
.card {
  background: var(--color-secondary);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success), var(--color-primary));
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card.featured {
  border: 2px solid var(--color-primary);
  transform: scale(1.05);
}

.card.featured::before {
  height: 6px;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: 30px;
  margin: 40px 0;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Forms */
.form-group {
  margin-bottom: 25px;
  position: relative;
}

.form-group label {
  display: block;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 1rem;
}

.form-input {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #333;
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: all 0.3s ease;
  font-family: var(--font-main);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 15px rgba(255, 204, 0, 0.2);
}

.form-input::placeholder {
  color: #666;
}

.form-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 15px rgba(255, 56, 56, 0.2);
}

/* Messages */
.message {
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}

.message-success {
  background: rgba(46, 213, 115, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.message-error {
  background: rgba(255, 56, 56, 0.1);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

.message-warning {
  background: rgba(255, 165, 2, 0.1);
  border: 1px solid var(--color-warning);
  color: var(--color-warning);
}

.message-info {
  background: rgba(55, 66, 250, 0.1);
  border: 1px solid var(--color-info);
  color: var(--color-info);
}

/* Special Sections */
.hero-section {
  background: linear-gradient(135deg, var(--color-secondary), #2a2a2a);
  border-radius: 15px;
  padding: 40px;
  margin: 30px 0;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
  border-top: 4px solid var(--color-primary);
}

.highlight-section {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 20px;
  padding: 50px 30px;
  margin: 40px 0;
  text-align: center;
  box-shadow: 0 15px 50px rgba(255, 204, 0, 0.4);
  position: relative;
  overflow: hidden;
  color: #000;
}

.highlight-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Scroll to Top Button */
#scrollTopBtn {
  display: none;
  position: fixed;
  bottom: 25px;
  right: 25px;
  z-index: 999;
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  color: #000;
  font-size: 20px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(255, 204, 0, 0.3);
  transition: background 0.3s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

#scrollTopBtn:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

/* Footer */
footer {
  background: var(--color-secondary);
  padding: 40px 20px 20px;
  font-size: 0.95rem;
  color: var(--color-muted);
  border-top: 1px solid #333;
  margin-top: 40px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h4 {
  color: var(--color-primary);
  font-family: var(--font-alt);
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 8px;
}

.footer-section ul li a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #333;
}

.footer-bottom p {
  margin-bottom: 10px;
  font-size: 0.85rem;
}

.footer-badges {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 15px;
  flex-wrap: wrap;
}

.badge {
  background: rgba(255, 204, 0, 0.1);
  color: var(--color-primary);
  padding: 5px 12px;
  border-radius: 15px;
  font-size: 0.8rem;
  border: 1px solid rgba(255, 204, 0, 0.3);
}

/* Navigation Active State */
nav a.active {
  color: var(--color-primary);
  position: relative;
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

/* Animations */
@keyframes pulse {
  0%, 100% { 
    transform: scale(1);
    opacity: 1;
  }
  50% { 
    transform: scale(1.05);
    opacity: 0.8;
  }
}

@keyframes fadeIn {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from { 
    transform: translateX(-100%);
  }
  to { 
    transform: translateX(0);
  }
}

.pulse {
  animation: pulse 2s infinite;
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in {
  animation: slideIn 0.5s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
    padding-left: 40px;
  }

  .burger {
    display: flex;
  }

  .auth-buttons {
    position: static;
    justify-content: center;
    margin-top: 10px;
    flex-wrap: wrap;
  }

  .logo {
    max-width: 160px;
    margin-bottom: 10px;
  }

  nav {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 20px 0;
  }

  nav.nav-active {
    display: flex;
  }

  main {
    padding: 30px 15px;
  }

  section {
    padding: 0 5px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
    text-align: center;
  }

  h3 {
    font-size: 1.3rem;
  }

  p {
    font-size: 1rem;
  }

  .grid {
    gap: 20px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .card.featured {
    transform: none;
  }

  .hero-section,
  .highlight-section {
    padding: 25px 20px;
  }
}

@media (max-width: 480px) {
  header {
    padding: 20px 15px;
  }

  header h1 {
    font-size: 1.8rem;
  }

  main {
    padding: 20px 10px;
  }

  .form-input {
    padding: 10px 12px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.95rem;
  }

  .card {
    padding: 20px;
  }
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid #333;
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mt-4 { margin-top: 40px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mb-4 { margin-bottom: 40px; }

.p-0 { padding: 0; }
.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }
.p-4 { padding: 40px; }

.hidden { display: none; }
.visible { display: block; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }
.gap-3 { gap: 30px; }
.gap-4 { gap: 40px; }