/* CSS Variables */
:root {
  --primary: #e63946;
  --secondary: #06d6a0;
  --bg: #0b0c10;
  --card: #1f2833;
  --text: #f1faee;
  --muted: #a8a8a8;
  --accent: #457b9d;
  --success: #06d6a0;
  --warning: #f77f00;
  --error: #d00000;

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

  /* Font System */
  --font-heading: "Oswald", sans-serif;
  --font-body: "Roboto", sans-serif;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.25);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 50%;
}

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

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

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
}
h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
}
h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}
h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.875rem);
}
h5 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
}
h6 {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
}

.btn:before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover:before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #d62839 100%);
  color: var(--text);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary) 0%, #05c091 100%);
  color: var(--bg);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--text);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 12, 16, 0.95);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  padding: var(--spacing-md) 0;
}

.navbar.scrolled {
  background: var(--bg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-sm) 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-normal);
  position: relative;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 3px;
  background: var(--text);
  transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(11, 12, 16, 0.8) 0%, rgba(31, 40, 51, 0.6) 100%);
  z-index: -1;
}

.hero-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.hero-text {
  max-width: 600px;
}

.hero-title {
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.2s both;
}

.highlight {
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.6s both;
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  color: var(--text);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Programs Section */
.programs {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--bg) 0%, #151a21 100%);
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.program-card {
  background: var(--card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.program-card:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.program-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.program-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

.program-card h3 {
  color: var(--text);
  margin-bottom: var(--spacing-md);
}

.program-card p {
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

/* Schedule Section */
.schedule {
  padding: var(--spacing-3xl) 0;
  background: var(--bg);
}

.schedule-table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  font-size: 0.9rem;
}

.schedule-table th,
.schedule-table td {
  padding: var(--spacing-md);
  text-align: center;
  border: 1px solid rgba(241, 250, 238, 0.1);
}

.schedule-table th {
  background: var(--primary);
  color: var(--text);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.time-slot {
  background: rgba(230, 57, 70, 0.1);
  font-weight: 600;
  color: var(--primary);
}

.class-cell {
  transition: all var(--transition-normal);
  cursor: pointer;
}

.class-cell:hover {
  background: rgba(6, 214, 160, 0.1);
  color: var(--secondary);
}

.today-class {
  background: var(--secondary);
  color: var(--bg);
  font-weight: 600;
  position: relative;
}

.today-class:after {
  content: "HARI INI";
  position: absolute;
  top: -8px;
  right: 8px;
  font-size: 0.7rem;
  background: var(--primary);
  color: var(--text);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* Instructors Section */
.instructors {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, #151a21 0%, var(--bg) 100%);
}

.instructors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.instructor-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.instructor-card:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.05) 0%, rgba(6, 214, 160, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.instructor-card:hover:before {
  opacity: 1;
}

.instructor-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.instructor-image {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 4px solid var(--primary);
  transition: all var(--transition-normal);
}

.instructor-card:hover .instructor-image {
  border-color: var(--secondary);
  transform: scale(1.05);
}

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

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

.instructor-info h3 {
  color: var(--text);
  margin-bottom: var(--spacing-sm);
}

.specialty {
  color: var(--secondary);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.social-links a {
  color: var(--muted);
  transition: all var(--transition-normal);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
}

.social-links a:hover {
  color: var(--primary);
  background: rgba(230, 57, 70, 0.1);
  transform: translateY(-2px);
}

/* Testimonials Section */
.testimonials {
  padding: var(--spacing-3xl) 0;
  background: var(--bg);
}

.testimonial-carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-track {
  overflow: hidden;
  position: relative;
}

.testimonial-slide {
  display: none;
  opacity: 0;
  transform: translateX(30px);
  transition: all var(--transition-slow);
}

.testimonial-slide.active {
  display: block;
  opacity: 1;
  transform: translateX(0);
}

.testimonial-content {
  background: var(--card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.testimonial-content:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.rating {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.testimonial-content p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
  color: var(--text);
  font-style: italic;
}

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

.testimonial-author img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--primary);
}

.author-info h4 {
  color: var(--text);
  margin-bottom: var(--spacing-xs);
}

.author-info p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--muted);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.nav-dot.active,
.nav-dot:hover {
  background: var(--primary);
  transform: scale(1.2);
}

/* Contact Section */
.contact {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--bg) 0%, #151a21 100%);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-item p {
  line-height: 1.7;
  color: var(--text);
}

/* Form Styles */
.membership-form {
  background: var(--card);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid rgba(241, 250, 238, 0.2);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  transition: all var(--transition-normal);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
  display: none;
}

.form-group.error .form-input,
.form-group.error .form-select {
  border-color: var(--error);
}

.form-group.error .error-message {
  display: block;
}

/* Footer */
.footer {
  background: var(--card);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  border-top: 1px solid rgba(241, 250, 238, 0.1);
}

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

.footer-section h3,
.footer-section h4 {
  color: var(--text);
  margin-bottom: var(--spacing-md);
}

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

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(241, 250, 238, 0.1);
}

.footer-bottom p {
  color: var(--muted);
  margin: 0;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  animation: fadeIn var(--transition-normal);
}

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

.modal-content {
  background: var(--card);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideInUp var(--transition-slow);
}

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 1px solid rgba(241, 250, 238, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  color: var(--text);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 2rem;
  cursor: pointer;
  transition: color var(--transition-normal);
}

.modal-close:hover {
  color: var(--primary);
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-footer {
  padding: var(--spacing-xl);
  border-top: 1px solid rgba(241, 250, 238, 0.1);
  text-align: right;
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-toggle {
    display: flex;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .programs-grid {
    grid-template-columns: 1fr;
  }

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

  .schedule-table {
    font-size: 0.8rem;
  }

  .schedule-table th,
  .schedule-table td {
    padding: var(--spacing-sm);
  }

  .testimonial-author {
    flex-direction: column;
    text-align: center;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .section-header {
    margin-bottom: var(--spacing-2xl);
  }

  .program-card,
  .instructor-card {
    padding: var(--spacing-lg);
  }

  .testimonial-content {
    padding: var(--spacing-lg);
  }

  .membership-form {
    padding: var(--spacing-lg);
  }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --bg: #000000;
    --text: #ffffff;
    --primary: #ff0000;
    --secondary: #00ff00;
  }
}

/* Print styles */
@media print {
  .navbar,
  .hero-buttons,
  .btn,
  .modal {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-lg) 0;
  }
}

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

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary);
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Focus visible for accessibility */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}