/* ==========================================================================
   Hand-drawn notebook / sketchbook theme
   - Light  = warm cream paper with ruled lines + red margin (marker-on-paper)
   - Dark   = chalkboard (dark slate + chalk handwriting)
   - Handwriting fonts via Google Fonts (Caveat / Patrick Hand / Shantell Sans)
   - Wobbly hand-drawn borders via inline SVG feTurbulence filter (#wobble)
   - Auto (system) light/dark + manual toggle via html[data-theme]
   ========================================================================== */

/* --- Design tokens: LIGHT (paper) ---------------------------------------- */

:root,
html[data-theme="light"] {
  --paper: #fbf7ec;
  --paper-soft: #f4eedd;
  --ink: #2b2b3a;          /* navy-black handwriting */
  --muted: #6a6577;        /* faded pencil */
  --line: #d9d0bb;         /* doodle border line */
  --rule: #cfe0ef;         /* faint blue ruled lines */
  --margin-red: #e9a8a8;   /* red margin line */
  --accent: #e2574c;       /* sketch red */
  --pencil-blue: #3f72b0;  /* link / pencil blue */
  --highlighter: #ffe37a;  /* highlighter yellow swipe */
  --highlighter-ink: #2b2b3a;
  --sticky: #ffe37a;       /* sticky-note yellow */
  --sticky-ink: #4a3f12;
  --chip: rgba(63, 114, 176, 0.12);
  --code-bg: #fff7d6;
  --shadow: rgba(43, 43, 58, 0.18);
  --grain: transparent;
}

/* Dark (chalkboard) when the OS prefers it (unless user forced light) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #222732;
    --paper-soft: #2a3140;
    --ink: #eef0e9;          /* chalk-white */
    --muted: #a7b0bd;        /* dim chalk */
    --line: #4a5566;         /* chalk border line */
    --rule: #38414f;         /* faint chalk rule */
    --margin-red: #6a4a4a;   /* faded chalk-red margin */
    --accent: #f4978e;       /* chalk pink-red */
    --pencil-blue: #8fc7e8;  /* chalk blue */
    --highlighter: #f2e08a;  /* chalk yellow */
    --highlighter-ink: #222732;
    --sticky: #c9b760;       /* dimmed sticky on chalkboard */
    --sticky-ink: #1d2027;
    --chip: rgba(143, 199, 232, 0.16);
    --code-bg: #2c3445;
    --shadow: rgba(0, 0, 0, 0.4);
    --grain: rgba(255, 255, 255, 0.018);
  }
}

/* Dark (chalkboard) when explicitly toggled */
html[data-theme="dark"] {
  --paper: #222732;
  --paper-soft: #2a3140;
  --ink: #eef0e9;
  --muted: #a7b0bd;
  --line: #4a5566;
  --rule: #38414f;
  --margin-red: #6a4a4a;
  --accent: #f4978e;
  --pencil-blue: #8fc7e8;
  --highlighter: #f2e08a;
  --highlighter-ink: #222732;
  --sticky: #c9b760;
  --sticky-ink: #1d2027;
  --chip: rgba(143, 199, 232, 0.16);
  --code-bg: #2c3445;
  --shadow: rgba(0, 0, 0, 0.4);
  --grain: rgba(255, 255, 255, 0.018);
}

/* --- Fonts ---------------------------------------------------------------- */

:root {
  --font-body: "Shantell Sans", "Comic Neue", "Patrick Hand", ui-rounded, system-ui, sans-serif;
  --font-hand: "Patrick Hand", "Comic Neue", ui-rounded, system-ui, sans-serif;
  --font-display: "Caveat", "Patrick Hand", cursive;
}

/* --- Base: the page is a sheet of ruled paper ----------------------------- */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.75;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;

  /* paper + ruled lines + red margin + (dark) chalk grain */
  background-color: var(--paper);
  background-image:
    /* chalk grain (transparent in light mode) */
    radial-gradient(var(--grain) 1px, transparent 1px),
    /* red margin line down the left */
    linear-gradient(to right, transparent 2.65rem, var(--margin-red) 2.65rem, var(--margin-red) calc(2.65rem + 2px), transparent calc(2.65rem + 2px)),
    /* horizontal ruled lines */
    repeating-linear-gradient(to bottom, transparent 0, transparent 27px, var(--rule) 27px, var(--rule) 28px);
  background-size: 4px 4px, 100% 100%, 100% 100%;
  background-attachment: fixed, fixed, fixed;
}

.doodle-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

/* centered "paper" content column */
.site-header,
main,
.site-footer {
  max-width: 46rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

a {
  color: var(--pencil-blue);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

::selection {
  background: var(--highlighter);
  color: var(--highlighter-ink);
}

/* --- Header --------------------------------------------------------------- */

.site-header {
  padding-top: 2.75rem;
  margin-bottom: 3rem;
}

.site-bar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.site-prompt {
  font-size: 2rem;
  line-height: 1;
  transform: rotate(-8deg);
  display: inline-block;
}

.site-brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 3.1rem;
  line-height: 0.95;
  letter-spacing: 0.01em;
  position: relative;
  color: var(--ink);
}

/* wavy hand-drawn underline beneath the brand */
.site-brand-text::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: -0.15em;
  height: 0.42em;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 12' preserveAspectRatio='none'%3E%3Cpath d='M2 7 C 20 2, 35 11, 55 6 S 95 2, 118 7' fill='none' stroke='%23e2574c' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
html[data-theme="dark"] .site-brand-text::after,
:root .site-brand-text::after { /* fallback */ }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .site-brand-text::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 12' preserveAspectRatio='none'%3E%3Cpath d='M2 7 C 20 2, 35 11, 55 6 S 95 2, 118 7' fill='none' stroke='%23f4978e' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E");
  }
}
html[data-theme="dark"] .site-brand-text::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 12' preserveAspectRatio='none'%3E%3Cpath d='M2 7 C 20 2, 35 11, 55 6 S 95 2, 118 7' fill='none' stroke='%23f4978e' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

.site-brand:hover .site-prompt { transform: rotate(4deg) scale(1.08); transition: transform 0.18s ease; }

/* tagline on a rotated sticky note */
.site-tagline {
  font-family: var(--font-hand);
  font-size: 1.15rem;
  color: var(--sticky-ink);
  background: var(--sticky);
  display: inline-block;
  margin: 1.4rem 0 0;
  padding: 0.35rem 0.9rem;
  transform: rotate(-2.2deg);
  box-shadow: 2px 4px 8px var(--shadow);
  border-radius: 2px 6px 4px 8px / 8px 3px 7px 4px;
}

/* --- Theme toggle --------------------------------------------------------- */

.theme-toggle {
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  border-radius: 14px 10px 14px 9px / 10px 14px 9px 14px;
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--ink);
  cursor: pointer;
  padding: 0;
  flex: none;
  transition: transform 0.15s ease, background 0.15s ease;
  filter: url(#wobble);
}

.theme-toggle:hover {
  background: var(--highlighter);
  color: var(--highlighter-ink);
  transform: rotate(-5deg);
}

.theme-icon { display: none; line-height: 1; }
.theme-icon-dark { display: inline; }
.theme-icon-light { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-icon-dark { display: none; }
  :root:not([data-theme="light"]) .theme-icon-light { display: inline; }
}
html[data-theme="dark"] .theme-icon-dark { display: none; }
html[data-theme="dark"] .theme-icon-light { display: inline; }
html[data-theme="light"] .theme-icon-dark { display: inline; }
html[data-theme="light"] .theme-icon-light { display: none; }

/* --- Navigation ----------------------------------------------------------- */

.site-header nav {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.75rem;
  padding-top: 1.1rem;
  font-family: var(--font-hand);
  font-size: 1.15rem;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  position: relative;
  padding: 0.1rem 0.35rem;
  transition: color 0.15s ease;
}

.site-header nav a:hover { color: var(--ink); }

/* active nav item: a highlighter swipe + a hand-drawn circle */
.site-header nav a[aria-current="true"] {
  color: var(--ink);
  background: linear-gradient(120deg, var(--highlighter) 0%, var(--highlighter) 100%);
  background-size: 100% 65%;
  background-position: 0 75%;
  background-repeat: no-repeat;
  border-radius: 2px;
}

.site-header nav a[aria-current="true"]::before {
  content: "✦ ";
  color: var(--accent);
}

/* --- Home: posts list as a to-do checklist -------------------------------- */

.all-posts {
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

.year-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

/* year heading: handwritten + hand-drawn circle around it */
.year-heading {
  margin: 0 0 0.9rem;
  border: 0;
  padding: 0;
}

.year-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.9rem;
  color: var(--ink);
  display: inline-block;
  padding: 0.1em 0.5em;
  position: relative;
  line-height: 1;
}

.year-label::after {
  content: "";
  position: absolute;
  inset: -0.25em -0.4em;
  border: 2px solid var(--accent);
  border-radius: 48% 52% 60% 40% / 55% 45% 55% 45%;
  filter: url(#wobble);
  opacity: 0.85;
  pointer-events: none;
}

.posts-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.post-row {
  padding: 0.5rem 0;
}

.post-link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}

/* hand-drawn checkbox that "checks" on hover */
.post-check {
  flex: none;
  align-self: center;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--muted);
  width: 1.3rem;
  text-align: center;
  transition: color 0.15s ease, transform 0.15s ease;
}
.post-check::before { content: "☐"; }

.post-link:hover .post-check {
  color: var(--accent);
  transform: scale(1.15) rotate(-4deg);
}
.post-link:hover .post-check::before { content: "☑"; }

.post-title {
  font-family: var(--font-hand);
  font-size: 1.35rem;
  font-weight: 400;
  flex: 1;
  line-height: 1.3;
  transition: color 0.15s ease;
}

.post-link:hover .post-title { color: var(--accent); }

/* doodle arrow that slides in on hover */
.post-arrow {
  font-family: var(--font-hand);
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.post-link:hover .post-arrow {
  opacity: 1;
  transform: translateX(0);
}

.post-meta {
  font-family: var(--font-hand);
  font-size: 1rem;
  color: var(--muted);
  white-space: nowrap;
}

.post-description {
  margin: 0.1rem 0 0 2rem;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.55;
}

.draft-badge {
  display: inline-block;
  font-family: var(--font-hand);
  font-size: 0.85rem;
  line-height: 1;
  padding: 0.2em 0.55em;
  margin-left: 0.3em;
  color: var(--accent);
  border: 2px dashed var(--accent);
  border-radius: 10px 7px 11px 6px / 7px 11px 6px 10px;
  transform: rotate(-3deg);
}

/* --- Post page ------------------------------------------------------------ */

/* "back" link as a doodled tag */
.post-back {
  display: inline-block;
  font-family: var(--font-hand);
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  margin: 0.5rem 0 2.25rem;
  padding: 0.3rem 0.85rem;
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  border-radius: 14px 9px 13px 8px / 9px 14px 8px 13px;
  filter: url(#wobble);
  transition: background 0.15s ease, transform 0.15s ease;
}
.post-back:hover {
  background: var(--highlighter);
  color: var(--highlighter-ink);
  transform: translateX(-3px) rotate(-1.5deg);
}

.post-head { margin-bottom: 2.5rem; }

.post-head h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 3rem;
  line-height: 1.05;
  margin: 0 0 0.9rem;
}

.post-meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  font-family: var(--font-hand);
  font-size: 1.02rem;
  color: var(--muted);
}

.post-meta-sep { opacity: 0.55; }

.post-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-left: 0.3rem;
}

/* tags as little hand-drawn label chips */
.post-tag {
  font-family: var(--font-hand);
  font-size: 0.95rem;
  color: var(--pencil-blue);
  background: var(--chip);
  padding: 0.1rem 0.55rem;
  border: 1.5px solid var(--pencil-blue);
  border-radius: 11px 6px 12px 5px / 6px 12px 5px 11px;
  line-height: 1.5;
}

/* --- Body typography ------------------------------------------------------ */

.post h2,
.post h3,
.post h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  margin-top: 2.5rem;
  margin-bottom: 0.6rem;
  color: var(--ink);
}
.post h2 { font-size: 2.1rem; }
.post h3 { font-size: 1.7rem; }
.post h4 { font-size: 1.4rem; }

.post p,
.post li { line-height: 1.8; }

.post a { color: var(--pencil-blue); }

.post img {
  max-width: 100%;
  height: auto;
  border: 2px solid var(--ink);
  border-radius: 8px 14px 9px 13px / 13px 9px 14px 8px;
  filter: url(#wobble);
}

mark, .post mark {
  background: var(--highlighter);
  color: var(--highlighter-ink);
  padding: 0.05em 0.15em;
  border-radius: 3px;
}

/* blockquote: a wobbly hand-drawn box with a doodle arrow marker */
.post blockquote {
  position: relative;
  margin: 1.75rem 0;
  padding: 0.9rem 1.2rem 0.9rem 2.4rem;
  color: var(--ink);
  font-family: var(--font-hand);
  font-size: 1.2rem;
  background: var(--paper-soft);
  border: 2px solid var(--ink);
  border-radius: 16px 10px 18px 8px / 9px 18px 10px 16px;
  filter: url(#wobble);
}
.post blockquote::before {
  content: "↳";
  position: absolute;
  left: 0.75rem;
  top: 0.7rem;
  color: var(--accent);
  font-size: 1.3rem;
}
.post blockquote p { margin: 0.3rem 0; }

/* --- Code: wobbly highlighter-tinted boxes -------------------------------- */

pre {
  background: var(--code-bg);
  border: 2px solid var(--ink);
  border-radius: 14px 9px 16px 8px / 9px 16px 8px 14px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  filter: url(#wobble);
  font-size: 0.95rem;
  line-height: 1.6;
}

code, pre, kbd {
  font-family: "Comic Neue", ui-monospace, "JetBrains Mono", Menlo, monospace;
}

:not(pre) > code {
  background: var(--highlighter);
  color: var(--highlighter-ink);
  border-radius: 5px;
  padding: 0.1em 0.4em;
  font-size: 0.9em;
}
pre code { background: none; color: inherit; padding: 0; }

/* lightweight syntax highlighting tuned to the palette */
.hljs-keyword, .hljs-selector-tag, .hljs-section, .hljs-link { color: var(--accent); }
.hljs-string, .hljs-attribute, .hljs-symbol, .hljs-bullet, .hljs-addition { color: var(--pencil-blue); }
.hljs-title, .hljs-name, .hljs-type { color: var(--ink); font-weight: 600; }
.hljs-number, .hljs-literal, .hljs-built_in { color: var(--accent); }
.hljs-comment, .hljs-quote, .hljs-meta { color: var(--muted); font-style: italic; }

hr {
  border: 0;
  height: 0.55em;
  margin: 2.5rem 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23e2574c' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
html[data-theme="dark"] hr {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23f4978e' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) hr {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23f4978e' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  }
}

/* --- Footer: a doodled signature line ------------------------------------- */

.site-footer {
  margin-top: 5rem;
  margin-bottom: 2.5rem;
  padding-top: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-hand);
  font-size: 1.02rem;
  color: var(--muted);
  position: relative;
}

/* wavy doodle line above the footer */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.5rem;
  right: 1.5rem;
  height: 0.5em;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23e2574c' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}
html[data-theme="dark"] .site-footer::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23f4978e' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .site-footer::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 10' preserveAspectRatio='none'%3E%3Cpath d='M2 6 C 30 1, 50 9, 80 5 S 140 1, 198 6' fill='none' stroke='%23f4978e' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  }
}

.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a {
  color: var(--pencil-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}
.footer-links a:hover { color: var(--accent); }

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 540px) {
  body { font-size: 17px; }
  .site-brand-text { font-size: 2.4rem; }
  .post-head h1 { font-size: 2.3rem; }
  .post-link { flex-wrap: wrap; }
  .post-meta { margin-left: 2rem; width: 100%; }
  .post-arrow { display: none; }
}

/* respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto; }
}