/* ============================================
   PREMIUM GYM WEBSITE - DESIGN SYSTEM
   Dark Luxury Theme with Neon Accents
   ============================================ */

/* ----- Design Tokens ----- */
:root {
  /* Colors */
  --color-primary: #E53935;
  --color-primary-light: #FF6B6B;
  --color-primary-dark: #C62828;
  --color-bg: #0A0A0A;
  --color-bg-secondary: #111111;
  --color-bg-card: #1A1A1A;
  --color-bg-elevated: #141414;
  --color-text: #FFFFFF;
  --color-text-secondary: #B0B0B0;
  --color-text-muted: #6B6B6B;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #E53935 0%, #FF6B6B 100%);
  --gradient-dark: linear-gradient(180deg, rgba(229, 57, 53, 0.1) 0%, transparent 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(229, 57, 53, 0.3);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Bebas Neue', 'Oswald', 'Arial Black', sans-serif;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-light);
}

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 4rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }

p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

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

/* ----- Layout ----- */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}

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

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-family: var(--font-primary);
  font-size: 15px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text);
  box-shadow: 0 4px 20px rgba(229, 57, 53, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(229, 57, 53, 0.6);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: rgba(229, 57, 53, 0.1);
}

.btn-lg {
  padding: 18px 48px;
  font-size: 16px;
}

/* ----- Navigation ----- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-lg) 0;
  transition: var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.9);
  -webkit-backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 0 20px rgba(229, 57, 53, 0.5);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition-base);
  position: relative;
  padding: var(--space-sm) 0;
}

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

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-cta {
  padding: 12px 28px;
  background: var(--gradient-primary);
  color: var(--color-text);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 20px rgba(229, 57, 53, 0.4);
  transition: var(--transition-base);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(229, 57, 53, 0.6);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-base);
}

/* ----- Hero Section ----- */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.3) 0%, rgba(10, 10, 10, 0.9) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(229, 57, 53, 0.15);
  border: 1px solid rgba(229, 57, 53, 0.3);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-xl);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-xl);
  text-transform: uppercase;
}

.hero-title span {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
}

.hero-stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.hero-stat-label {
  font-size: 13px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ----- Cards ----- */
.glass-card {
  background: var(--gradient-glass);
  -webkit-backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: var(--transition-base);
}

.glass-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(229, 57, 53, 0.1);
  border: 1px solid rgba(229, 57, 53, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: var(--space-lg);
  transition: var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: rgba(229, 57, 53, 0.2);
  transform: scale(1.1) rotate(5deg);
}

.feature-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.feature-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ----- Pricing ----- */
.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-2xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.pricing-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  background: linear-gradient(180deg, rgba(229, 57, 53, 0.1) 0%, var(--color-bg-card) 100%);
  transform: scale(1.05);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 20px;
  background: var(--gradient-primary);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 15px rgba(229, 57, 53, 0.4);
}

.pricing-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-description {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.pricing-amount {
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
}

.pricing-period {
  font-size: 16px;
  color: var(--color-text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-2xl);
}

.pricing-features li {
  padding: 10px 0;
  color: var(--color-text-secondary);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  font-size: 18px;
}

/* ----- Trainers ----- */
.trainer-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
}

.trainer-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-lg);
}

.trainer-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
}

.trainer-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.trainer-card:hover .trainer-image img {
  transform: scale(1.1);
}

.trainer-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 14px;
  background: rgba(229, 57, 53, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: var(--radius-full);
}

.trainer-info {
  padding: var(--space-xl);
}

.trainer-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.trainer-role {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.trainer-bio {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.trainer-stats {
  display: flex;
  gap: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.trainer-stat-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.trainer-stat-label {
  font-size: 12px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ----- Testimonials ----- */
.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: var(--transition-base);
}

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

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: var(--space-lg);
  color: #FFD700;
  font-size: 18px;
}

.testimonial-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text);
}

.testimonial-name {
  font-weight: 600;
  margin-bottom: 2px;
}

.testimonial-role {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ----- Forms ----- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-input {
  width: 100%;
  padding: 14px 18px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: 15px;
  transition: var(--transition-base);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

/* ----- Footer ----- */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4xl) 0 var(--space-2xl);
  margin-top: var(--space-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.footer-description {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  width: 40px;
  height: 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: var(--transition-base);
}

.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-2px);
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 14px;
  transition: var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
}

/* ----- Page Loader ----- */
.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-xl);
}

.loader-logo {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loader-bar {
  width: 100%;
  height: 3px;
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.loader-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 30%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(250%); }
  100% { transform: translateX(-100%); }
}

/* ----- Animations ----- */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

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

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(229, 57, 53, 0.5); }
  50% { box-shadow: 0 0 40px rgba(229, 57, 53, 0.8); }
}

/* ----- Utilities ----- */
.glow { box-shadow: var(--shadow-glow); }
.pulse { animation: pulse 2s ease-in-out infinite; }
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ----- Grid ----- */
.grid { display: grid; gap: var(--space-xl); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

/* ----- Mobile Menu ----- */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.98);
    -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 100px 40px;
    transition: right var(--transition-base);
  }

  .nav-links.active { right: 0; }
  .nav-toggle { display: flex; z-index: 999; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-lg { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}