@import url("https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@500;600&family=Inter:wght@400;500&family=JetBrains+Mono:wght@400&display=swap");

:root {
  /* Colours */
  --color-bg: #000000;
  --color-surface: #0a0a0a;
  --color-elevated: #141414;
  --color-inset: #080808;
  --color-ivory-primary: #fffff0;
  --color-ivory-secondary: #e8e8d8;
  --color-muted: #888888;
  --color-placeholder: #666666;
  --color-divider: #333333;
  --color-gold-base: #b79f85;
  --color-gold-hover: #c9b59f;
  --color-gold-active: #a0886e;
  --color-gold-muted: #8a7761;
  --color-gold-glow: rgba(183, 159, 133, 0.2);
  --color-success: #2e7d32;
  --color-warning: #ed6c02;
  --color-error: #d32f2f;
  --color-info: #0288d1;

  /* Spacing — 4px base grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --card-padding: 24px;
  --card-padding-mobile: 16px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Typography */
  --font-display: "Instrument Sans", system-ui, sans-serif;
  --font-heading: "Instrument Sans", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-code: "JetBrains Mono", ui-monospace, monospace;

  --text-display-size: 48px;
  --text-display-line: 1.2;
  --text-display-weight: 600;
  --text-h1-size: 32px;
  --text-h1-line: 1.3;
  --text-h1-weight: 500;
  --text-h2-size: 24px;
  --text-h2-line: 1.3;
  --text-h2-weight: 500;
  --text-h3-size: 20px;
  --text-h3-line: 1.4;
  --text-h3-weight: 500;
  --text-body-lg-size: 16px;
  --text-body-lg-line: 1.5;
  --text-body-size: 14px;
  --text-body-line: 1.5;
  --text-caption-size: 12px;
  --text-caption-line: 1.4;
  --text-code-size: 13px;
  --text-code-line: 1.4;

  /* Motion */
  --duration-micro: 150ms;
  --duration-toggle: 200ms;
  --duration-modal: 250ms;
  --duration-page: 300ms;
  --duration-shimmer: 1.5s;
  --ease-out: ease-out;
  --ease-in-out: ease-in-out;
  --ease-modal: cubic-bezier(0.2, 0.9, 0.4, 1.1);

  /* Borders */
  --border-default: 1px solid var(--color-divider);
  --border-active: 1px solid var(--color-gold-base);
  --focus-ring: 0 0 0 2px var(--color-gold-glow);
}

@media (max-width: 768px) {
  :root {
    --text-display-size: 32px;
    --text-h1-size: 28px;
    --card-padding: var(--card-padding-mobile);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-ivory-primary);
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100dvh;
}

::selection {
  background: var(--color-gold-glow);
  color: var(--color-ivory-primary);
}

::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

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

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

h1,
.h1 {
  font-family: var(--font-heading);
  font-size: var(--text-h1-size);
  font-weight: var(--text-h1-weight);
  line-height: var(--text-h1-line);
}

h2,
.h2 {
  font-family: var(--font-heading);
  font-size: var(--text-h2-size);
  font-weight: var(--text-h2-weight);
  line-height: var(--text-h2-line);
}

h3,
.h3 {
  font-family: var(--font-body);
  font-size: var(--text-h3-size);
  font-weight: var(--text-h3-weight);
  line-height: var(--text-h3-line);
}

.display {
  font-family: var(--font-display);
  font-size: var(--text-display-size);
  font-weight: var(--text-display-weight);
  line-height: var(--text-display-line);
}

.body-lg {
  font-size: var(--text-body-lg-size);
  line-height: var(--text-body-lg-line);
}

.caption {
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line);
  color: var(--color-muted);
}

code,
.code {
  font-family: var(--font-code);
  font-size: var(--text-code-size);
  line-height: var(--text-code-line);
}

:focus-visible {
  outline: none;
  outline: 2px solid rgba(183, 159, 133, 0.2);
  outline-offset: 2px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  min-width: 44px;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  border: var(--border-default);
  cursor: pointer;
  text-decoration: none;
  transition:
    transform var(--duration-micro) var(--ease-out),
    background-color var(--duration-micro) var(--ease-out),
    border-color var(--duration-micro) var(--ease-out),
    color var(--duration-micro) var(--ease-out);
}

.btn-primary {
  background: var(--color-gold-base);
  color: var(--color-bg);
  border-color: var(--color-gold-base);
}

.btn-primary:hover {
  background: var(--color-gold-hover);
  border-color: var(--color-gold-hover);
  transform: scale(1.02);
}

.btn-primary:active {
  background: var(--color-gold-active);
  border-color: var(--color-gold-active);
  transform: scale(0.98);
}

.btn-secondary {
  background: transparent;
  color: var(--color-ivory-primary);
  border-color: var(--color-divider);
}

.btn-secondary:hover {
  background: var(--color-elevated);
  border-color: var(--color-gold-muted);
}

.card {
  background: var(--color-surface);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--card-padding);
  transition: border-color var(--duration-micro) var(--ease-out);
}

.card:hover {
  border-color: var(--color-gold-muted);
}

.input {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-elevated);
  border: var(--border-default);
  border-radius: var(--radius-md);
  color: var(--color-ivory-primary);
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line);
  transition:
    border-color var(--duration-micro) var(--ease-out),
    border-color var(--duration-micro) var(--ease-out);
}

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

.input:focus {
  outline: none;
  border: var(--border-active);
  outline: 2px solid rgba(183, 159, 133, 0.2);
  outline-offset: 2px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.badge--success {
  color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 10%, transparent);
}

.badge--warning {
  color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 10%, transparent);
}

.badge--error {
  color: var(--color-error);
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
}

.badge--info {
  color: var(--color-info);
  background: color-mix(in srgb, var(--color-info) 10%, transparent);
}

.badge--gold {
  color: var(--color-gold-base);
  background: var(--color-gold-glow);
}

.toast {
  position: fixed;
  top: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  padding: var(--space-4) var(--space-6);
  background: var(--color-elevated);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--color-ivory-primary);
  animation: slide-in-top var(--duration-modal) var(--ease-modal);
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-elevated) 0%,
    var(--color-inset) 40%,
    var(--color-elevated) 80%
  );
  background-size: 200% 100%;
  animation: shimmer var(--duration-shimmer) linear infinite;
  border-radius: var(--radius-md);
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slide-in-top {
  from {
    opacity: 0;
    transform: translate(-50%, -8px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.animate-fade-in {
  animation: fade-in var(--duration-page) var(--ease-in-out);
}

.animate-slide-in-top {
  animation: slide-in-top var(--duration-modal) var(--ease-modal);
}

.animate-scale-in {
  animation: scale-in var(--duration-modal) var(--ease-modal);
}

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

  .skeleton {
    animation: none;
    background: var(--color-elevated);
  }
}