(** Theme CSS files for the scrollycode extension.

    Each theme sets the CSS custom property values defined in
    {!Scrollycode_css.structural_css} and imports its Google Fonts. *)

(** Warm Workshop theme.
    Cream background, burnt sienna accents, Fraunces + Source Serif 4. *)
let warm_css =
  {|@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=Source+Code+Pro:ital,wght@0,300..900;1,300..900&family=Source+Serif+4:ital,opsz,wght@0,8..60,300..900;1,8..60,300..900&display=swap');

.sc-container {
  /* Typography */
  --sc-font-display: 'Fraunces', serif;
  --sc-font-body: 'Source Serif 4', Georgia, serif;
  --sc-font-code: 'Source Code Pro', monospace;

  /* Colors */
  --sc-bg: #f5f0e6;
  --sc-text: #2c2416;
  --sc-text-dim: #8a7c6a;
  --sc-accent: #c25832;
  --sc-accent-soft: rgba(194, 88, 50, 0.08);
  --sc-code-bg: #1a1a2e;
  --sc-code-text: #d4d0c8;
  --sc-code-gutter: #3a3a52;
  --sc-border: rgba(44, 36, 22, 0.1);
  --sc-focus-bg: rgba(194, 88, 50, 0.06);
  --sc-panel-radius: 12px;

  /* Syntax highlighting */
  --sc-hl-keyword: #f0a6a0;
  --sc-hl-type: #8ec8e8;
  --sc-hl-string: #b8d89a;
  --sc-hl-comment: #6a6a82;
  --sc-hl-number: #ddb97a;
  --sc-hl-module: #e8c87a;
  --sc-hl-operator: #c8a8d8;
  --sc-hl-punct: #7a7a92;

  /* Mobile */
  --sc-mobile-step-bg: rgba(255,255,255,0.5);
}

/* Warm hero: centered */
.sc-container .sc-hero {
  text-align: center;
  border-bottom: 1px solid var(--sc-border);
}

.sc-container .sc-hero h1 {
  font-style: italic;
}

.sc-container .sc-hero p {
  margin: 0 auto;
}

/* Warm code panel: navy shadow */
.sc-container .sc-code-panel {
  box-shadow: 0 20px 60px rgba(26, 26, 46, 0.3), 0 0 0 1px rgba(255,255,255,0.03) inset;
}

/* Warm dots: traffic light colors */
.sc-container .sc-dots span:nth-child(1) { background: #ff5f57; }
.sc-container .sc-dots span:nth-child(2) { background: #ffbd2e; }
.sc-container .sc-dots span:nth-child(3) { background: #28c840; }

/* Warm diff */
.sc-container .sc-diff-block {
  background: #1e1b2e;
}
.sc-container .sc-diff-added { background: rgba(80, 200, 80, 0.15); border-left: 3px solid #4caf50; }
.sc-container .sc-diff-removed { background: rgba(255, 80, 80, 0.12); border-left: 3px solid #ef5350; text-decoration: line-through; opacity: 0.7; }
.sc-container .sc-diff-same { opacity: 0.5; }
|}

(** Dark Terminal theme.
    Near-black background, phosphor green and amber, JetBrains Mono + Outfit. *)
let dark_css =
  {|@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300..800&family=Outfit:wght@300..900&display=swap');

.sc-container {
  /* Typography */
  --sc-font-display: 'Outfit', sans-serif;
  --sc-font-body: 'Outfit', sans-serif;
  --sc-font-code: 'JetBrains Mono', monospace;

  /* Colors */
  --sc-bg: #0a0a0f;
  --sc-text: #e8e6f0;
  --sc-text-dim: #6e6b80;
  --sc-accent: #4ade80;
  --sc-accent-soft: rgba(74, 222, 128, 0.06);
  --sc-code-bg: #0f0f18;
  --sc-code-text: #c8c5d8;
  --sc-code-gutter: #2a2a3e;
  --sc-border: rgba(255, 255, 255, 0.06);
  --sc-focus-bg: rgba(74, 222, 128, 0.04);
  --sc-panel-radius: 0;

  /* Syntax highlighting — neon palette */
  --sc-hl-keyword: #ff7eb3;
  --sc-hl-type: #7dd3fc;
  --sc-hl-string: #4ade80;
  --sc-hl-comment: #4a4a62;
  --sc-hl-number: #fbbf24;
  --sc-hl-module: #c4b5fd;
  --sc-hl-operator: #67e8f9;
  --sc-hl-punct: #4a4a62;

  /* Mobile */
  --sc-mobile-step-bg: rgba(255,255,255,0.04);
}

/* Dark hero: left-aligned, larger */
.sc-container .sc-hero {
  text-align: left;
  padding: 8rem 4rem 4rem;
  max-width: 800px;
  position: relative;
}

.sc-container .sc-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(74, 222, 128, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.sc-container .sc-hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin-bottom: 1.25rem;
}

.sc-container .sc-hero h1 em {
  font-style: normal;
  color: var(--sc-accent);
}

.sc-container .sc-hero p {
  max-width: 50ch;
  font-weight: 300;
}

/* Dark layout: narrow prose, wide code */
.sc-container .sc-steps-col {
  width: 38%;
  flex: none;
  padding: 2rem 2.5rem 50vh 4rem;
  border-right: 1px solid var(--sc-border);
}

.sc-container .sc-code-col {
  flex: 1;
  width: auto;
}

/* Dark step number: with line */
.sc-container .sc-step-number {
  font-weight: 700;
  letter-spacing: 0.15em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sc-container .sc-step-number::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--sc-border);
}

.sc-container .sc-step h2 {
  font-size: 1.4rem;
  line-height: 1.2;
}

.sc-container .sc-step p {
  font-size: 0.9rem;
  max-width: 40ch;
  font-weight: 300;
}

/* Dark code panel: full viewport height */
.sc-container .sc-code-panel {
  top: 0;
  height: 100vh;
  margin: 0;
  border-radius: 0;
  border-left: 1px solid var(--sc-border);
  box-shadow: none;
}

.sc-container .sc-code-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--sc-border);
  gap: 1rem;
}

.sc-container .sc-dots span {
  width: 8px;
  height: 8px;
  background: var(--sc-code-gutter);
}

.sc-container .sc-filename {
  color: var(--sc-text-dim);
  text-align: left;
}

.sc-container .sc-step-badge {
  color: var(--sc-accent);
  background: rgba(74, 222, 128, 0.08);
  padding: 0.25em 0.75em;
  border-radius: 3px;
}

.sc-container .sc-code-body {
  padding: 1.5rem 0;
  line-height: 1.75;
}

.sc-container .sc-line {
  padding: 0 1.5rem;
  transition: opacity 0.3s ease, background 0.3s ease;
  opacity: 0.25;
}

.sc-container .sc-line.sc-focused {
  border-left: 2px solid var(--sc-accent);
  padding-left: calc(1.5rem - 2px);
}

.sc-container .sc-line-number {
  margin-right: 2ch;
}

/* Dark progress: right side, bar style */
.sc-container .sc-progress {
  left: auto;
  right: 1.5rem;
  gap: 10px;
}

.sc-container .sc-pip {
  width: 3px;
  height: 20px;
  border-radius: 2px;
}

.sc-container .sc-pip.sc-active {
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.5);
  height: 30px;
  transform: none;
}

/* Dark mobile */
.sc-container .sc-mobile-step {
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.08);
}

.sc-container .sc-mobile-step-num {
  font-family: var(--sc-font-body);
  letter-spacing: 0.2em;
  color: #00d4aa;
}

.sc-container .sc-mobile-step h2 {
  color: #e8e6e3;
}

.sc-container .sc-mobile-step p {
  color: rgba(232,230,227,0.7);
}

.sc-container .sc-diff-block {
  background: #0d1117;
  border: 1px solid rgba(0,212,170,0.15);
}
.sc-container .sc-diff-added { background: rgba(0, 212, 170, 0.12); border-left: 3px solid #00d4aa; }
.sc-container .sc-diff-removed { background: rgba(255, 80, 80, 0.1); border-left: 3px solid #ff6b6b; text-decoration: line-through; opacity: 0.6; }
.sc-container .sc-diff-same { opacity: 0.4; }

.sc-container .sc-playground-btn {
  border-color: rgba(0,212,170,0.3);
  color: #00d4aa;
}
.sc-container .sc-playground-btn:hover {
  background: rgba(0,212,170,0.1);
  border-color: #00d4aa;
}
|}

(** Notebook theme.
    Soft white, blue-violet accent, Newsreader + DM Sans. *)
let notebook_css =
  {|@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=DM+Sans:ital,opsz,wght@0,9..40,300..900;1,9..40,300..900&family=Newsreader:ital,opsz,wght@0,6..72,300..800;1,6..72,300..800&display=swap');

.sc-container {
  /* Typography */
  --sc-font-display: 'Newsreader', serif;
  --sc-font-body: 'DM Sans', sans-serif;
  --sc-font-code: 'DM Mono', 'Source Code Pro', monospace;

  /* Colors */
  --sc-bg: #fafbfe;
  --sc-text: #1a1a2e;
  --sc-text-dim: #64648a;
  --sc-accent: #6366f1;
  --sc-accent-soft: rgba(99, 102, 241, 0.06);
  --sc-code-bg: #1e1e32;
  --sc-code-text: #d1d0e0;
  --sc-code-gutter: #3a3a52;
  --sc-border: rgba(99, 102, 241, 0.08);
  --sc-focus-bg: rgba(99, 102, 241, 0.05);
  --sc-panel-radius: 16px;

  /* Syntax highlighting — cool tones */
  --sc-hl-keyword: #a78bfa;
  --sc-hl-type: #67e8f9;
  --sc-hl-string: #86efac;
  --sc-hl-comment: #4a4a62;
  --sc-hl-number: #fde68a;
  --sc-hl-module: #f9a8d4;
  --sc-hl-operator: #93c5fd;
  --sc-hl-punct: #4a4a62;

  /* Mobile */
  --sc-mobile-step-bg: #ffffff;
}

/* Notebook hero: left-aligned, accent underline */
.sc-container .sc-hero {
  text-align: left;
  padding: 6rem 0 3rem;
  max-width: 640px;
  margin: 0 auto;
  border-bottom: 2px solid var(--sc-accent);
  position: relative;
}

.sc-container .sc-hero::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 120px;
  height: 2px;
  background: var(--sc-accent);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.sc-container .sc-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.sc-container .sc-hero p {
  font-size: 1rem;
  max-width: 52ch;
  font-weight: 400;
}

/* Notebook layout: constrained width */
.sc-container .sc-tutorial {
  max-width: 1200px;
  margin: 0 auto;
}

.sc-container .sc-steps-col {
  padding: 2rem 3rem 50vh 0;
  max-width: 420px;
}

.sc-container .sc-code-col {
  flex: 1;
  width: auto;
}

/* Notebook step: accent line indicator */
.sc-container .sc-step {
  min-height: 60vh;
  padding: 1.5rem 0;
  position: relative;
}

.sc-container .sc-step::before {
  content: '';
  position: absolute;
  left: -1.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--sc-accent);
  border-radius: 2px;
  transition: height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.sc-container .sc-step-number {
  font-family: var(--sc-font-body);
  font-weight: 700;
  letter-spacing: 0.12em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sc-container .sc-step h2 {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}

.sc-container .sc-step p {
  font-size: 0.88rem;
  max-width: 42ch;
}

/* Notebook code panel */
.sc-container .sc-code-panel {
  top: 8vh;
  height: 84vh;
  margin: 0 0 0 2rem;
  box-shadow:
    0 24px 80px rgba(30, 30, 50, 0.15),
    0 0 0 1px rgba(99, 102, 241, 0.08);
}

.sc-container .sc-code-header {
  background: rgba(99, 102, 241, 0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  gap: 0.75rem;
}

.sc-container .sc-dots span {
  width: 9px;
  height: 9px;
  background: rgba(255,255,255,0.08);
}

.sc-container .sc-code-body {
  font-size: 0.78rem;
  line-height: 1.75;
}

.sc-container .sc-line {
  opacity: 0.3;
}

/* Notebook progress: left side, square pips */
.sc-container .sc-progress {
  left: 2rem;
  gap: 6px;
}

.sc-container .sc-pip {
  width: 8px;
  height: 8px;
  border-radius: 3px;
}

.sc-container .sc-pip.sc-active {
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
  border-radius: 2px;
  width: 8px;
  height: 16px;
  transform: none;
}

/* Notebook mobile */
.sc-container .sc-mobile-step {
  border-radius: 6px;
  border: 1px solid #e0ddd8;
}

.sc-container .sc-mobile-step-num {
  font-family: var(--sc-font-body);
  font-weight: 600;
  color: #0066cc;
}

.sc-container .sc-mobile-step h2 {
  color: #1a1a1a;
}

.sc-container .sc-mobile-step p {
  color: #4a4a4a;
}

.sc-container .sc-diff-block {
  background: #282c34;
  border: 1px solid #e0ddd8;
  font-family: 'IBM Plex Mono', monospace;
}
.sc-container .sc-diff-added { background: rgba(0, 102, 204, 0.12); border-left: 3px solid #0066cc; }
.sc-container .sc-diff-removed { background: rgba(220, 50, 50, 0.1); border-left: 3px solid #dc3232; text-decoration: line-through; opacity: 0.6; }
.sc-container .sc-diff-same { opacity: 0.4; }

.sc-container .sc-playground-btn {
  border-color: rgba(0,102,204,0.3);
  color: #0066cc;
}
.sc-container .sc-playground-btn:hover {
  background: rgba(0,102,204,0.1);
  border-color: #0066cc;
}
|}

(** Register all theme CSS files as support files *)
let () =
  let register name content =
    Odoc_extension_api.Registry.register_support_file ~prefix:"scrolly" {
      filename = "extensions/scrollycode-" ^ name ^ ".css";
      content = Inline content;
    }
  in
  register "warm" warm_css;
  register "dark" dark_css;
  register "notebook" notebook_css