@import "tailwindcss";
@plugin "@tailwindcss/typography";

@custom-variant dark (&:where(.dark, .dark *));

@theme {
  /* Accent colors - using Tailwind sky palette */
  --color-accent: theme(colors.sky.500);
  --color-accent-light: theme(colors.sky.400);

  /* Fonts - via Astro experimental font API (fontsource provider) */
  --font-display: var(--font-bricolage);
  --font-sans: var(--font-dm-sans);
  --font-mono: var(--font-jetbrains);

  /* Sizing */
  --header-height: 4rem;
  --sidebar-width: 260px;
  --content-max-width: 800px;
  --section-padding-y: 6rem;
  --section-padding-x: 2rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 600ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px theme(colors.sky.500 / 15%);
}

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

/* Scroll margin for anchor links */
[id] {
  scroll-margin-top: calc(var(--header-height) + 2rem);
}

/* Base styles */
@layer base {
  html {
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
    overflow-x: hidden;
    background-color: theme(colors.slate.50);
    color: theme(colors.slate.950);
  }

  .dark body {
    background-color: theme(colors.neutral.950);
    color: theme(colors.neutral.50);
  }

  /* Typography */
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: theme(colors.slate.950);
  }

  .dark h1,
  .dark h2,
  .dark h3,
  .dark h4,
  .dark h5,
  .dark h6 {
    color: theme(colors.neutral.50);
  }

  h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
  }

  h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
  }

  h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    margin-top: 2rem;
    margin-bottom: 1rem;
  }

  p {
    margin-bottom: 1.25rem;
  }

  /* Links */
  a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
    word-break: break-word;
  }

  a:hover {
    color: var(--color-accent-light);
  }

  /* Code */
  code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    border-radius: 4px;
    padding: 0.2em 0.4em;
    background-color: theme(colors.slate.950 / 5%);
  }

  .dark code {
    background-color: theme(colors.neutral.400 / 15%);
  }

  pre {
    font-family: var(--font-mono);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    line-height: 1.6;
    background-color: theme(colors.slate.200);
  }

  .dark pre {
    background-color: theme(colors.neutral.900);
  }

  pre>code {
    background-color: transparent !important;
    padding: 0;
    font-size: 0.875rem;
  }

  /* Lists */
  ul,
  ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
  }

  ul {
    list-style-type: disc;
  }

  ol {
    list-style-type: decimal;
  }

  li {
    margin-bottom: 0.5rem;
  }

  ol ol,
  ul ol {
    list-style-type: decimal;
  }

  ul ul ol,
  ul ol ol,
  ol ul ol,
  ol ol ol {
    list-style-type: decimal;
  }

  /* Blockquotes */
  blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: theme(colors.slate.600);
  }

  .dark blockquote {
    color: theme(colors.neutral.400);
  }

  /* Strong text */
  strong {
    font-weight: 600;
  }

  /* Focus styles */
  :focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }
}

/* Keyframe animations - defined outside layers for proper cascade */
@keyframes clause-highlight-pulse {
  0% {
    background-color: theme(colors.sky.500 / 15%);
  }

  100% {
    background-color: transparent;
  }
}

@keyframes clause-highlight-pulse-dark {
  0% {
    background-color: theme(colors.sky.700 / 20%);
  }

  100% {
    background-color: transparent;
  }
}

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

  to {
    opacity: 1;
  }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-down {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-in-left {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounce-subtle {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

/* Animation utility classes */
.animate-fade-in {
  opacity: 0;
  animation: fade-in 400ms ease-out forwards;
}

.animate-fade-in-up {
  opacity: 0;
  animation: fade-in-up 600ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-fade-in-down {
  opacity: 0;
  animation: fade-in-down 250ms ease-out forwards;
}

.animate-slide-in-left {
  opacity: 0;
  animation: slide-in-left 600ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-bounce-subtle {
  animation: bounce-subtle 2s ease-in-out infinite;
}

/* 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;
}

.delay-600 {
  animation-delay: 600ms;
}

.delay-700 {
  animation-delay: 700ms;
}

.delay-800 {
  animation-delay: 800ms;
}

/* Component styles */
@layer components {

  /* Section container - uses CSS vars, keep here */
  .section-container {
    max-width: calc(var(--content-max-width) + var(--sidebar-width) + 4rem);
    margin: 0 auto;
    padding: 0 var(--section-padding-x);
  }

  /* Prose styling for markdown content - can't add classes to rendered HTML */
  .prose-spec {
    max-width: var(--content-max-width);
  }

  .prose-spec h2 {
    font-size: 1.75rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid theme(colors.slate.200);
  }

  .dark .prose-spec h2 {
    border-bottom-color: theme(colors.neutral.800);
  }

  .prose-spec h2:first-child {
    margin-top: 0;
  }

  .prose-spec h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: theme(colors.slate.600);
  }

  .dark .prose-spec h3 {
    color: theme(colors.neutral.400);
  }

  .prose-spec p {
    color: theme(colors.slate.600);
  }

  .dark .prose-spec p {
    color: theme(colors.neutral.400);
  }

  .prose-spec strong {
    color: theme(colors.neutral.700);
  }

  .dark .prose-spec strong {
    color: theme(colors.neutral.300);
  }

  .prose-spec li {
    color: theme(colors.slate.600);
  }

  .dark .prose-spec li {
    color: theme(colors.neutral.400);
  }

  /* Spec clauses - ordered list with CSS counters and hover anchor links */
  .prose-spec ol {
    padding-left: 2.25rem;
    counter-reset: item;
    list-style: none;
  }

  .prose-spec ol>li {
    counter-increment: item;
    position: relative;
    margin-bottom: 0.5rem;
  }

  .prose-spec ol>li::before {
    content: counters(item, ".") ".";
    position: absolute;
    left: -2.5rem;
    width: 2rem;
    text-align: right;
    font-weight: 500;
    color: theme(colors.slate.400);
  }

  .dark .prose-spec ol>li::before {
    color: theme(colors.neutral.500);
  }

  /* Clause highlight effect using ::after pseudo-element */
  .prose-spec ol>li::after {
    content: "";
    position: absolute;
    inset: -0.25rem -0.5rem;
    left: -2.75rem;
    background-color: transparent;
    border-radius: 4px;
    pointer-events: none;
    z-index: -1;
  }

  .prose-spec ol>li.clause-highlight::after {
    animation: clause-highlight-pulse 2s ease-out forwards;
  }

  .dark .prose-spec ol>li.clause-highlight::after {
    animation: clause-highlight-pulse-dark 2s ease-out forwards;
  }

  /* Anchor link with clause number - hidden by default, shown on hover */
  .prose-spec .clause-link {
    position: absolute;
    right: 100%;
    padding-right: 0.5rem;
    font-weight: 500;
    color: theme(colors.slate.400);
    text-decoration: none;
    opacity: 0;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
  }

  .dark .prose-spec .clause-link {
    color: theme(colors.neutral.500);
  }

  /* Link icon in the anchor link */
  .prose-spec .clause-link-icon {
    flex-shrink: 0;
    width: 0.875rem;
    height: 0.875rem;
  }

  /* On hover: show anchor link, hide CSS counter */
  .prose-spec ol>li:hover:not(:has(ol:hover))>.clause-link,
  .prose-spec ol>li:hover:not(:has(ol:hover))>p>.clause-link,
  .prose-spec .clause-link:hover {
    opacity: 1;
  }

  .prose-spec ol>li:hover:not(:has(ol:hover))::before {
    opacity: 0;
  }

  /* Hover color for clause anchor link */
  .prose-spec .clause-link:hover {
    color: theme(colors.sky.500);
  }

  .prose-spec img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 2rem 0;
  }

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

  /* Nav link active state (toggled by JavaScript) */
  .nav-link.active {
    color: theme(colors.sky.700) !important;
    background-color: theme(colors.sky.600 / 15%) !important;
  }

  .dark .nav-link.active {
    color: theme(colors.sky.400) !important;
    background-color: theme(colors.sky.600 / 20%) !important;
  }

  /* Sidebar link active state (toggled by JavaScript) */
  .sidebar-link.active {
    color: theme(colors.sky.700) !important;
    background-color: theme(colors.sky.600 / 15%) !important;
  }

  .dark .sidebar-link.active {
    color: theme(colors.sky.400) !important;
    background-color: theme(colors.sky.600 / 20%) !important;
  }

  /* Sidebar scrollbar styling */
  #spec-sidebar::-webkit-scrollbar {
    width: 4px;
  }

  #spec-sidebar::-webkit-scrollbar-track {
    background: transparent;
  }

  #spec-sidebar::-webkit-scrollbar-thumb {
    background-color: theme(colors.slate.200);
    border-radius: 2px;
  }

  .dark #spec-sidebar::-webkit-scrollbar-thumb {
    background-color: theme(colors.neutral.800);
  }
}