:root {
  /* Colors */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);
  --color-select-caret: rgba(19, 52, 59, 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31, 33, 33, 1);
    --color-surface: rgba(38, 40, 40, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(50, 184, 198, 1);
    --color-primary-hover: rgba(45, 166, 178, 1);
    --color-primary-active: rgba(41, 150, 161, 1);
    --color-secondary: rgba(119, 124, 124, 0.15);
    --color-secondary-hover: rgba(119, 124, 124, 0.25);
    --color-secondary-active: rgba(119, 124, 124, 0.3);
    --color-border: rgba(119, 124, 124, 0.3);
    --color-error: rgba(255, 84, 89, 1);
    --color-success: rgba(50, 184, 198, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(50, 184, 198, 0.4);
    --color-btn-primary-text: rgba(19, 52, 59, 1);
    --color-card-border: rgba(119, 124, 124, 0.2);
    --color-card-border-inner: rgba(119, 124, 124, 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(119, 124, 124, 0.2);
    --color-border-secondary: rgba(119, 124, 124, 0.2);
    --color-select-caret: rgba(245, 245, 245, 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: 50, 184, 198;
    --color-error-rgb: 255, 84, 89;
    --color-warning-rgb: 230, 129, 97;
    --color-info-rgb: 167, 169, 169;
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  --color-background: rgba(31, 33, 33, 1);
  --color-surface: rgba(38, 40, 40, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(50, 184, 198, 1);
  --color-primary-hover: rgba(45, 166, 178, 1);
  --color-primary-active: rgba(41, 150, 161, 1);
  --color-secondary: rgba(119, 124, 124, 0.15);
  --color-secondary-hover: rgba(119, 124, 124, 0.25);
  --color-secondary-active: rgba(119, 124, 124, 0.3);
  --color-border: rgba(119, 124, 124, 0.3);
  --color-error: rgba(255, 84, 89, 1);
  --color-success: rgba(50, 184, 198, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(50, 184, 198, 0.4);
  --color-btn-primary-text: rgba(19, 52, 59, 1);
  --color-card-border: rgba(119, 124, 124, 0.15);
  --color-card-border-inner: rgba(119, 124, 124, 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(119, 124, 124, 0.2);
  --color-select-caret: rgba(245, 245, 245, 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: 50, 184, 198;
  --color-error-rgb: 255, 84, 89;
  --color-warning-rgb: 230, 129, 97;
  --color-info-rgb: 167, 169, 169;
}

[data-color-scheme="light"] {
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

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

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

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

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

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

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

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

.btn--secondary:active {
  background: var(--color-secondary-active);
}

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

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

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

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

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

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */
/* Bitcoin Watermark */
.bitcoin-watermark {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bitcoin-watermark span {
    position: absolute;
    font-size: 200px;
    color: #F7931A;
    opacity: 0.08;
    font-weight: bold;
    user-select: none;
}

.bitcoin-watermark span:nth-child(1) { top: 10%; left: 10%; }
.bitcoin-watermark span:nth-child(2) { top: 30%; left: 30%; }
.bitcoin-watermark span:nth-child(3) { top: 50%; left: 50%; }
.bitcoin-watermark span:nth-child(4) { top: 70%; left: 70%; }
.bitcoin-watermark span:nth-child(5) { top: 90%; left: 20%; }
.bitcoin-watermark span:nth-child(6) { top: 20%; left: 80%; }
.bitcoin-watermark span:nth-child(7) { top: 60%; left: 15%; }
.bitcoin-watermark span:nth-child(8) { top: 40%; left: 85%; }
.bitcoin-watermark span:nth-child(9) { top: 80%; left: 60%; }
.bitcoin-watermark span:nth-child(10) { top: 15%; left: 45%; }

/* Custom color overrides for Bitcoin theme */
:root {
    --bitcoin-orange: #F7931A;
    --bitcoin-dark: #1A1A1A;
    --bitcoin-gold: #D4AF37;
    --bitcoin-green: #28A745;
    --bitcoin-blue: #1E3A8A;
    --bitcoin-dark-blue: #0A2540;
}

/* Header */
.header {
    background: var(--bitcoin-dark-blue);
    border-bottom: 2px solid var(--bitcoin-gold);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-16) var(--space-16);
    max-width: 1200px;
    margin: 0 auto;
}

.nav__brand h1 {
    font-size: 36px;
    color: white;
    margin: 0;
    font-weight: var(--font-weight-bold);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.nav__brand p {
    font-size: var(--font-size-lg);
    color: var(--bitcoin-gold);
    margin: 0;
}

.nav__menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-24);
}

.nav__link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: all var(--duration-fast) var(--ease-standard);
    padding: var(--space-8) var(--space-12);
    border-radius: var(--radius-base);
}

.nav__link:hover {
    color: var(--bitcoin-gold);
    background: rgba(255, 215, 0, 0.1);
    transform: translateY(-2px);
}

.nav__link.active {
    color: var(--bitcoin-gold) !important;
    background: rgba(255, 215, 0, 0.2);
    font-weight: var(--font-weight-semibold);
}

.nav__toggle {
    display: none;
    background: none;
    border: 2px solid var(--bitcoin-gold);
    color: var(--bitcoin-gold);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--space-8);
    border-radius: var(--radius-base);
}

/* Main Content */
.main {
    margin-top: 90px;
}

.section {
    padding: var(--space-32) 0;
    position: relative;
}

.section__title {
    text-align: center;
    margin-bottom: var(--space-32);
    font-size: var(--font-size-3xl);
    color: var(--bitcoin-dark-blue);
    font-weight: var(--font-weight-bold);
}

/* Hero Section */
.hero {
    background: var(--bitcoin-dark-blue);
    color: white;
    padding: var(--space-32) 0;
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="white" opacity="0.03"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero__content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero__content h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-16);
    color: var(--bitcoin-gold);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--bitcoin-gold);
    margin-bottom: var(--space-32);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero__description {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.hero__description p {
    color: white;
    line-height: 1.5;
    margin-bottom: var(--space-16);
    font-size: 18px;
}

/* Indicators Grid */
.indicators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-24);
    margin-top: var(--space-32);
}

.indicator-card {
    background: white;
    border-radius: 8px;
    padding: var(--space-20);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all var(--duration-normal) var(--ease-standard);
}

.indicator-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.indicator-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-12);
}

.indicator-card__header h3 {
    font-size: 18px;
    color: var(--bitcoin-dark-blue);
    margin: 0;
    font-weight: var(--font-weight-bold);
}

.indicator-weight {
    background: var(--bitcoin-gold);
    color: var(--bitcoin-dark);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
}

.indicator-description {
    color: var(--color-text);
    margin: 0 0 var(--space-8) 0;
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.indicator-boundaries {
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    font-style: italic;
    margin: 0;
}

/* Chart Container */
.chart-container {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    margin-bottom: var(--space-24);
    height: 400px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-24);
    flex-wrap: wrap;
    margin-bottom: var(--space-24);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.legend-color--low {
    background: var(--bitcoin-green);
}

.legend-color--medium {
    background: #FFA500;
}

.legend-color--high {
    background: #DC3545;
}

/* Table Styles */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.table th {
    background: linear-gradient(135deg, #0A5EFF 0%, #0A40FF 100%);
    color: white;
    font-weight: var(--font-weight-semibold);
    padding: var(--space-12) var(--space-16);
    text-align: left;
    font-size: var(--font-size-sm);
}

.table td {
    padding: var(--space-12) var(--space-16);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
}

.table tbody tr:hover {
    background: rgba(255, 215, 0, 0.05);
}

.table tbody tr:nth-child(even) {
    background: white;
}

.table tbody tr:nth-child(odd) {
    background: rgba(0, 0, 0, 0.02);
}

/* Table row highlighting for status */
.table tbody tr.approximation-row {
    background: #FFF9E5 !important;
}

.table tbody tr.high-risk-row {
    background: #FFEDEC !important;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

/* Table Controls */
.table-controls {
    display: flex;
    gap: var(--space-16);
    margin-bottom: var(--space-24);
    flex-wrap: wrap;
}

.table-controls .form-group {
    flex: 1;
    min-width: 200px;
}

/* Simulator */
.simulator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
    align-items: start;
}

.simulator-inputs {
    display: grid;
    gap: var(--space-16);
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group .form-label {
    margin-bottom: var(--space-8);
    color: var(--bitcoin-dark-blue);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
}

.input-group .form-control {
    margin-bottom: var(--space-4);
}

.input-weight {
    font-size: var(--font-size-xs);
    color: var(--bitcoin-gold);
    font-weight: var(--font-weight-medium);
}

.simulator-result {
    background: var(--color-surface);
    border: 2px solid var(--bitcoin-gold);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 120px;
}

.result-display {
    text-align: center;
    margin-bottom: var(--space-24);
}

.result-display h3 {
    margin-bottom: var(--space-12);
    color: var(--bitcoin-dark-blue);
}

.score-display {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--bitcoin-orange);
    margin-bottom: var(--space-12);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.score-breakdown {
    margin-bottom: var(--space-24);
}

.score-breakdown h4 {
    margin-bottom: var(--space-16);
    color: var(--bitcoin-dark-blue);
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-8);
    border-bottom: 1px solid var(--color-border);
}

.breakdown-item:last-child {
    border-bottom: none;
}

.breakdown-label {
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.breakdown-value {
    color: var(--bitcoin-orange);
    font-weight: var(--font-weight-semibold);
}

.simulator-actions {
    display: flex;
    gap: var(--space-12);
}

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

/* Status Indicators */
.status {
    display: inline-flex;
    align-items: center;
    padding: var(--space-6) var(--space-12);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
}

.status--success {
    background: rgba(40, 167, 69, 0.15);
    color: var(--bitcoin-green);
    border: 1px solid var(--bitcoin-green);
}

.status--warning {
    background: rgba(255, 165, 0, 0.15);
    color: #FFA500;
    border: 1px solid #FFA500;
}

.status--error {
    background: rgba(220, 53, 69, 0.15);
    color: #DC3545;
    border: 1px solid #DC3545;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
    align-items: start;
}

.contact-info,
.donation-info {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-info h3,
.donation-info h3 {
    margin-bottom: var(--space-16);
    color: white;
}

.contact-info p,
.donation-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-16);
}

.contact-item {
    margin-bottom: var(--space-12);
}

.contact-item strong {
    color: white;
}

.contact-item a {
    color: var(--bitcoin-gold);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.donation-section {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--space-16);
    border-radius: var(--radius-base);
    margin-top: var(--space-16);
}

.donation-item {
    margin-bottom: var(--space-16);
}

.donation-item:last-child {
    margin-bottom: 0;
}

.donation-item strong {
    color: white;
    display: block;
    margin-bottom: var(--space-8);
}

.donation-address {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-base);
    padding: var(--space-12);
    margin-top: var(--space-8);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
}

.donation-address:hover {
    background: rgba(255, 255, 255, 0.15);
}

.donation-address code {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.9);
    word-break: break-all;
    background: none;
    padding: 0;
}

.disclaimer {
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--bitcoin-gold);
    border-radius: var(--radius-lg);
    padding: var(--space-20);
    margin-top: var(--space-32);
}

.disclaimer h4 {
    margin-bottom: var(--space-12);
    color: var(--bitcoin-gold);
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.disclaimer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--space-12);
}

.disclaimer p:last-child {
    margin-bottom: 0;
}

.disclaimer strong {
    color: var(--bitcoin-gold);
}

/* Footer */
.footer {
    background: var(--bitcoin-dark);
    color: white;
    padding: var(--space-24) 0;
    text-align: center;
    border-top: 2px solid var(--bitcoin-gold);
}

.footer p {
    margin: 0 0 var(--space-8) 0;
    font-size: var(--font-size-sm);
}

.footer p:last-child {
    margin-bottom: 0;
}

/* Button Overrides */
.btn--primary {
    background: var(--bitcoin-gold);
    color: var(--bitcoin-dark);
    border: none;
    font-weight: var(--font-weight-semibold);
    text-shadow: none;
}

.btn--primary:hover {
    background: var(--bitcoin-orange);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(247, 147, 26, 0.3);
}

.btn--secondary {
    background: var(--color-surface);
    color: var(--bitcoin-dark-blue);
    border: 2px solid var(--bitcoin-gold);
}

.btn--secondary:hover {
    background: rgba(255, 215, 0, 0.1);
    border-color: var(--bitcoin-orange);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bitcoin-dark-blue);
        border-top: 2px solid var(--bitcoin-gold);
        flex-direction: column;
        padding: var(--space-16);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-normal) var(--ease-standard);
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__toggle {
        display: block;
    }

    .nav__brand h1 {
        font-size: var(--font-size-2xl);
    }

    .hero__content h2 {
        font-size: var(--font-size-3xl);
    }

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

    .hero__description p {
        font-size: var(--font-size-base);
    }

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

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

    .contact-content {
        grid-template-columns: 1fr;
    }

    .table-controls {
        flex-direction: column;
    }

    .chart-legend {
        flex-direction: column;
        align-items: center;
    }

    .simulator-actions {
        flex-direction: column;
    }

    .bitcoin-watermark span {
        font-size: 150px;
    }
}

@media (max-width: 480px) {
    .nav {
        padding: var(--space-12) var(--space-16);
    }

    .nav__brand h1 {
        font-size: var(--font-size-xl);
    }

    .section {
        padding: var(--space-24) 0;
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }

    .hero__content h2 {
        font-size: var(--font-size-2xl);
    }

    .chart-container {
        height: 300px;
        padding: var(--space-16);
    }

    .table th,
    .table td {
        padding: var(--space-8) var(--space-12);
        font-size: var(--font-size-sm);
    }

    .bitcoin-watermark span {
        font-size: 120px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Additional utility classes */
.text-center {
    text-align: center;
}

.text-success {
    color: var(--bitcoin-green);
}

.text-warning {
    color: #FFA500;
}

.text-error {
    color: #DC3545;
}

.font-weight-bold {
    font-weight: var(--font-weight-bold);
}

.font-weight-medium {
    font-weight: var(--font-weight-medium);
}

/* Enhanced form controls */
.form-control {
    border: 2px solid var(--color-border);
    transition: all var(--duration-fast) var(--ease-standard);
}

.form-control:focus {
    border-color: var(--bitcoin-gold);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.2);
}

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

.indicator-card {
    animation: fadeInUp 0.6s ease-out;
}

.indicator-card:nth-child(1) { animation-delay: 0.1s; }
.indicator-card:nth-child(2) { animation-delay: 0.2s; }
.indicator-card:nth-child(3) { animation-delay: 0.3s; }
.indicator-card:nth-child(4) { animation-delay: 0.4s; }
.indicator-card:nth-child(5) { animation-delay: 0.5s; }
.indicator-card:nth-child(6) { animation-delay: 0.6s; }
.indicator-card:nth-child(7) { animation-delay: 0.7s; }

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--bitcoin-orange);
}

/* Container override */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-16);
}

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

/* Copy feedback */
.copy-feedback {
    background: var(--bitcoin-green);
    color: white;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-base);
    font-size: var(--font-size-xs);
    position: absolute;
    transform: translateY(-100%);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.copy-feedback.show {
    opacity: 1;
}