/**
 * PROGRESSIVE WEB APP - STYLESHEET
 * Tema: Hitam & Biru Modern
 * Mobile First Responsive Design
 */

/* ============================================
   CSS VARIABLES - Color Theme
   ============================================ */
:root {
  /* Primary Colors - Blue Theme */
  --color-primary: #1e40af;
  --color-primary-dark: #1e3a8a;
  --color-primary-light: #3b82f6;

  /* Background Colors - Dark Theme */
  --color-bg-primary: #000000;
  --color-bg-secondary: #0a0a0a;
  --color-bg-tertiary: #111111;
  --color-bg-card: #1a1a1a;

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  /* Border & Divider */
  --color-border: #27272a;
  --color-divider: #18181b;

  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Font Sizes */
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 1.875rem;
  --font-4xl: 2.25rem;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ============================================
   LOADING OVERLAY
   ============================================ */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

.loading-text {
  margin-top: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
}

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

/* ============================================
   INSTALL BANNER
   ============================================ */
.install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: var(--spacing-md);
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  animation: slideUp 0.3s ease-out;
}

.install-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.install-icon {
  font-size: var(--font-3xl);
  flex-shrink: 0;
}

.install-text {
  flex: 1;
}

.install-text h3 {
  font-size: var(--font-lg);
  margin-bottom: var(--spacing-xs);
}

.install-text p {
  font-size: var(--font-sm);
  opacity: 0.9;
}

.install-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* ============================================
   UPDATE NOTIFICATION
   ============================================ */
.update-notification {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-info);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  z-index: 1000;
  animation: slideInRight 0.3s ease-out;
}

.update-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.update-icon {
  font-size: var(--font-2xl);
  flex-shrink: 0;
}

.update-text {
  flex: 1;
}

.update-text h3 {
  font-size: var(--font-base);
  margin-bottom: var(--spacing-xs);
}

.update-text p {
  font-size: var(--font-sm);
  color: var(--color-text-secondary);
}

.update-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  outline: none;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
}

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

.btn-secondary:hover {
  background: var(--color-bg-tertiary);
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-icon {
  padding: var(--spacing-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
}

.btn-icon:hover {
  background: var(--color-bg-card);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

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

.logo h1 {
  font-size: var(--font-xl);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  gap: var(--spacing-sm);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
  width: 100%;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0;
}

.hero-title {
  font-size: var(--font-4xl);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
}

/* ============================================
   STATUS CARDS
   ============================================ */
.status-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.status-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all var(--transition-normal);
}

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

.status-icon {
  font-size: var(--font-3xl);
  flex-shrink: 0;
}

.status-info h3 {
  font-size: var(--font-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.status-info p {
  font-size: var(--font-base);
  font-weight: 600;
}

/* ============================================
   SECTIONS
   ============================================ */
.features,
.demo {
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: var(--font-2xl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

/* ============================================
   FEATURE GRID
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.feature-icon {
  font-size: var(--font-4xl);
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-size: var(--font-lg);
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
}

/* ============================================
   DEMO SECTION
   ============================================ */
.demo-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.demo-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.demo-card h3 {
  font-size: var(--font-lg);
  margin-bottom: var(--spacing-md);
}

.demo-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  color: var(--color-text-secondary);
  font-size: var(--font-sm);
  margin-bottom: var(--spacing-sm);
}

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

.footer-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary-light);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
.toast-container {
  position: fixed;
  bottom: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-info);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: slideInLeft 0.3s ease-out;
}

.toast.success {
  border-left-color: var(--color-success);
}

.toast.error {
  border-left-color: var(--color-danger);
}

.toast.warning {
  border-left-color: var(--color-warning);
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */
@media (max-width: 768px) {
  :root {
    --font-4xl: 1.875rem;
    --font-3xl: 1.5rem;
    --font-2xl: 1.25rem;
  }

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

  .install-content {
    flex-wrap: wrap;
  }

  .install-actions {
    width: 100%;
    justify-content: stretch;
  }

  .install-actions .btn {
    flex: 1;
  }

  .update-notification {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-width: none;
  }

  .status-cards {
    grid-template-columns: 1fr;
  }

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

  .demo-container {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 480px) {
  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .header-content {
    padding: var(--spacing-md);
  }

  .logo h1 {
    font-size: var(--font-lg);
  }

  .install-banner {
    padding: var(--spacing-sm);
  }

  .install-text h3 {
    font-size: var(--font-base);
  }

  .install-text p {
    font-size: var(--font-xs);
  }

  .toast-container {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    bottom: var(--spacing-sm);
    max-width: none;
  }
}

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

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

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

.online-indicator {
  color: var(--color-success);
}

.offline-indicator {
  color: var(--color-danger);
}