/* =============================================================================
   SwingTracker.io - Shared Styles
   Design System: Dark trading dashboard theme
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   ----------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-background: #0a0b0d;
  --color-surface: #14161a;
  --color-surface-highlight: #1f2229;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-accent: #10b981;
  --color-danger: #ef4444;
  --color-text-main: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #334155;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Monaco, monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);

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

/* -----------------------------------------------------------------------------
   Base Styles
   ----------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-background);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

/* -----------------------------------------------------------------------------
   Typography
   ----------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-main);
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin: 0;
  color: var(--color-text-muted);
}

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

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

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.font-mono {
  font-family: var(--font-mono);
}

/* -----------------------------------------------------------------------------
   Layout
   ----------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-lg {
  padding: 5rem 0;
}

/* -----------------------------------------------------------------------------
   Header / Navigation
   ----------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background-color: rgba(10, 11, 13, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  text-decoration: none;
}

.logo:hover {
  opacity: 0.9;
}

.logo-img {
  height: 3rem;
  width: auto;
  display: block;
}

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

.nav-link {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

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

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  color: var(--color-text-main);
  cursor: pointer;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg);
}

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

.mobile-menu .nav-link {
  display: block;
  padding: var(--spacing-sm) 0;
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #2563eb);
  color: white;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
  color: white;
}

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

.btn-secondary:hover {
  background-color: var(--color-surface-highlight);
  color: var(--color-text-main);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}

/* -----------------------------------------------------------------------------
   Cards
   ----------------------------------------------------------------------------- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

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

.card-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-main);
}

.card-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* -----------------------------------------------------------------------------
   Feature Sections (for Features page)
   ----------------------------------------------------------------------------- */
.feature-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  padding: var(--spacing-3xl) 0;
}

.feature-section:nth-child(even) {
  direction: rtl;
}

.feature-section:nth-child(even) > * {
  direction: ltr;
}

.feature-content {
  max-width: 500px;
}

.feature-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
}

.feature-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.feature-image {
  position: relative;
}

.feature-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .feature-section {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .feature-section:nth-child(even) {
    direction: ltr;
  }

  .feature-content {
    max-width: 100%;
  }
}

/* -----------------------------------------------------------------------------
   Screenshot Frame
   ----------------------------------------------------------------------------- */
.screenshot-frame {
  position: relative;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-background) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xs);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.1),
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    var(--shadow-glow);
}

.screenshot-frame::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.screenshot-frame img {
  display: block;
  width: 100%;
  border-radius: calc(var(--radius-xl) - var(--spacing-xs));
}

/* -----------------------------------------------------------------------------
   Hero Section
   ----------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: 6rem;
  padding-bottom: var(--spacing-3xl);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
}

.hero-badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
  font-size: 1.25rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--spacing-2xl);
  color: var(--color-text-muted);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

/* -----------------------------------------------------------------------------
   Features Grid
   ----------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* -----------------------------------------------------------------------------
   Security Section
   ----------------------------------------------------------------------------- */
.security-section {
  text-align: center;
  background: linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 50%, var(--color-background) 100%);
}

.security-icon {
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
  border: 1px solid var(--color-border);
  border-radius: 50%;
  margin: 0 auto var(--spacing-xl);
  color: var(--color-accent);
}

.security-features {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
}

.security-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.security-feature svg {
  color: var(--color-accent);
}

/* -----------------------------------------------------------------------------
   CTA Section
   ----------------------------------------------------------------------------- */
.cta-section {
  text-align: center;
  padding: 5rem 0;
}

.cta-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

.cta-description {
  font-size: 1.125rem;
  max-width: 500px;
  margin: 0 auto var(--spacing-2xl);
  color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

.footer-link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer-link:hover {
  color: var(--color-text-main);
}

/* -----------------------------------------------------------------------------
   Form Elements
   ----------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-main);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

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

.form-inline .form-input {
  flex: 1;
}

@media (max-width: 480px) {
  .form-inline {
    flex-direction: column;
  }
}

/* -----------------------------------------------------------------------------
   Animations
   ----------------------------------------------------------------------------- */
.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slide-up {
  animation: slideUp 0.6s ease-out forwards;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

/* Staggered animation delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* -----------------------------------------------------------------------------
   Utilities
   ----------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.mx-auto { margin-left: auto; margin-right: auto; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

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

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.w-full { width: 100%; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }

/* Page Hero (for subpages) */
.page-hero {
  padding-top: 8rem;
  padding-bottom: var(--spacing-3xl);
  text-align: center;
}

.page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-lg);
}

.page-hero-subtitle {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
  color: var(--color-text-muted);
}