/*
 * Tom Critchlow Blog Design System
 * Converted from Tailwind configuration to standalone CSS
 * Based on DESIGN_SYSTEM.md, tailwind.config.js, and tailwind-base.css
 */

/* ==========================================================================
   CSS Custom Properties - Design System Tokens
   ========================================================================== */

:root {
  /* Primary Colors - Blue Theme */
  --color-primary-blue: #0066cc;
  --color-bright-blue: #00a0ff;
  --color-light-blue: #e6f2ff;

  /* Legacy names for compatibility */
  --color-newgreen: #0066cc;
  --color-bright-green: #00a0ff;
  --color-newgreen-light: #e6f2ff;

  /* Text Colors */
  --color-text-black: #212121;
  --color-black-50: rgba(0, 0, 0, 0.5);
  --color-black-10: rgba(0, 0, 0, 0.1);
  --color-black-20: rgba(0, 0, 0, 0.2);
  --color-black-90: rgba(0, 0, 0, 0.9);

  /* Background Colors */
  --color-bg-white: #fffff8;
  --color-near-white: #f3f3f3;

  /* Other Colors */
  --color-sidenote-blue: #0066cc;

  /* Typography */
  --font-sans: "Libre Franklin", sans-serif;
  --font-serif: Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif;
  --font-mono: "IBM Plex Mono", monospace;
  --font-code: Consolas, "Liberation Mono", Menlo, Courier, monospace;

  /* Font Sizes (Tachyons scale) */
  --font-size-f1: 3rem;      /* ~48px */
  --font-size-f2: 2.25rem;   /* ~36px */
  --font-size-f3: 1.5rem;    /* ~24px */
  --font-size-f4: 1.25rem;   /* ~20px */
  --font-size-f5: 1rem;      /* ~16px */
  --font-size-f6: 0.875rem;  /* ~14px */
  --font-size-f7: 0.75rem;   /* ~12px */
  --font-size-body: 1.1rem;

  /* Layout */
  --sidebar-width: 223px;
  --content-width: 66.666667%;
  --max-width: 1024px;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.5rem;
  --spacing-6: 2rem;
  --spacing-7: 2.5rem;
  --spacing-8: 3rem;

  /* Transitions */
  --transition-fast: 50ms ease-in;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html {
  font-family: var(--font-sans);
  color: var(--color-text-black);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-bg-white);
  counter-reset: sidenote-counter;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* Reset */
h1, h2, h3, h4, h5, h6,
p, blockquote, pre, dl, dd, ol, ul, form, fieldset, legend, input, select, textarea, button {
  margin: 0;
  padding: 0;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 800;
  line-height: 1;
}

.f1 { font-size: var(--font-size-f1); }
.f2 { font-size: var(--font-size-f2); }
.f3 { font-size: var(--font-size-f3); }
.f4 { font-size: var(--font-size-f4); }
.f5 { font-size: var(--font-size-f5); }
.f6 { font-size: var(--font-size-f6); }
.f7 { font-size: var(--font-size-f7); }

.fw3 { font-weight: 300; }
.fw4 { font-weight: 400; }
.fw6 { font-weight: 600; }
.fw7 { font-weight: 700; }
.fw8 { font-weight: 800; }

.lh-solid { line-height: 1; }
.lh-copy { line-height: 1.6; }
.lh-title { line-height: 1.2; }

.ttu { text-transform: uppercase; }
.tracked { letter-spacing: 0.1em; }

.i { font-style: italic; }
.b { font-weight: bold; }

.ibmplexmono { font-family: var(--font-mono); }

/* ==========================================================================
   Colors
   ========================================================================== */

.newgreen { color: var(--color-newgreen); }
.black { color: var(--color-text-black); }
.black-50 { color: var(--color-black-50); }

.bg-newgreen { background-color: var(--color-newgreen); }
.bg-white { background-color: #fff; }
.bg-near-white { background-color: var(--color-near-white); }
.bg-transparent { background-color: transparent; }

.b--newgreen { border-color: var(--color-newgreen); }
.b--bright-green { border-color: var(--color-bright-green); }
.b--black-10 { border-color: var(--color-black-10); }
.b--black-20 { border-color: var(--color-black-20); }

/* ==========================================================================
   Layout & Grid
   ========================================================================== */

.db { display: block; }
.dn { display: none; }
.flex { display: flex; }
.inline-block { display: inline-block; }

.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

.fixed { position: fixed; }
.relative { position: relative; }
.absolute { position: absolute; }

.fl { float: left; }
.fr { float: right; }

.w-100 { width: 100%; }
.w-two-thirds { width: 66.666667%; }
.w5 { width: var(--sidebar-width); }

.mw8 { max-width: var(--max-width); }

.center { margin-left: auto; margin-right: auto; }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Padding */
.pa0 { padding: 0; }
.pa2 { padding: var(--spacing-2); }
.pa3 { padding: var(--spacing-3); }
.pa4 { padding: var(--spacing-4); }
.pa5 { padding: var(--spacing-5); }

.ph0 { padding-left: 0; padding-right: 0; }
.ph3 { padding-left: var(--spacing-3); padding-right: var(--spacing-3); }

.pv2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.pv3 { padding-top: var(--spacing-3); padding-bottom: var(--spacing-3); }
.pv4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.pv5 { padding-top: var(--spacing-5); padding-bottom: var(--spacing-5); }

.pt4 { padding-top: var(--spacing-4); }
.pt5 { padding-top: var(--spacing-5); }

.pb2 { padding-bottom: var(--spacing-2); }
.pb4 { padding-bottom: var(--spacing-4); }

.pr3 { padding-right: var(--spacing-3); }
.pl3 { padding-left: var(--spacing-3); }

/* Margin */
.ma0 { margin: 0; }
.mt1 { margin-top: var(--spacing-1); }
.mt2 { margin-top: var(--spacing-2); }
.mv1 { margin-top: var(--spacing-1); margin-bottom: var(--spacing-1); }
.mv2 { margin-top: var(--spacing-2); margin-bottom: var(--spacing-2); }

.mb2 { margin-bottom: var(--spacing-2); }
.mb3 { margin-bottom: var(--spacing-3); }
.mb4 { margin-bottom: var(--spacing-4); }
.mb5 { margin-bottom: var(--spacing-5); }

.mh3 { margin-left: var(--spacing-3); margin-right: var(--spacing-3); }

/* Borders */
.ba { border-style: solid; border-width: 1px; }
.bb { border-bottom-style: solid; border-bottom-width: 1px; }
.br2 { border-radius: 0.25rem; }
.br3 { border-radius: 0.375rem; }

/* Border widths */
.bw1 { border-width: 1px; }
.bw2 { border-width: 2px; }
.bw4 { border-width: 4px; }

/* ==========================================================================
   Links
   ========================================================================== */

a {
  color: var(--color-newgreen);
  text-decoration: none;
  font-weight: bold;
  transition: all var(--transition-fast);
}

a:hover {
  box-shadow: inset 0 -24px 0 rgba(0, 160, 255, 0.3);
}

.link {
  color: var(--color-newgreen);
  text-decoration: none;
  font-weight: bold;
}

.link-black {
  color: var(--color-text-black);
  text-decoration: none;
}

.link-black:hover {
  box-shadow: inset 0 -24px 0 rgba(0, 160, 255, 0.3);
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.sidebar-nav {
  position: fixed;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--color-near-white);
  top: 0;
  left: 0;
  overflow-y: auto;
  z-index: 100;
}

.nav-item {
  display: block;
  display: flex;
  align-items: center;
  margin-left: var(--spacing-3);
  margin-right: var(--spacing-3);
  padding: var(--spacing-2);
  background-color: transparent;
  color: var(--color-text-black);
  text-decoration: none;
  border-radius: 0.5rem;
  text-transform: uppercase;
  transition: background-color 0.2s;
}

.nav-item:hover {
  background-color: #fff;
  box-shadow: none;
}

.nav-item.active {
  background-color: #fff;
}

.bg-animate:hover {
  background-color: #fff;
}

.hover-bg-white:hover {
  background-color: #fff;
}

/* ==========================================================================
   Layout Structure
   ========================================================================== */

.sidebar-layout {
  margin-left: var(--sidebar-width);
}

.content-width {
  width: 100%;
}

/* ==========================================================================
   Post Styles
   ========================================================================== */

.postcontainer {
  word-wrap: break-word;
}

.postcontainer h2,
.postcontainer h3 {
  padding-top: var(--spacing-6);
  margin-bottom: 0;
}

.postcontainer p,
.postcontainer li,
.postcontainer blockquote {
  line-height: 1.6;
  font-size: var(--font-size-body);
}

.postcontainer li {
  padding-top: var(--spacing-1);
  padding-bottom: var(--spacing-1);
}

.postcontainer p img {
  max-width: 100%;
  padding-top: var(--spacing-6);
  padding-bottom: var(--spacing-6);
}

.post-title {
  font-size: var(--font-size-f2);
  font-weight: 800;
  line-height: 1;
  margin-top: var(--spacing-1);
  margin-bottom: var(--spacing-1);
}

.posttitle {
  font-size: var(--font-size-f2);
  font-weight: 800;
  line-height: 1;
  margin-top: var(--spacing-1);
  margin-bottom: var(--spacing-1);
}

.subtitle {
  font-size: var(--font-size-f3);
  font-weight: 300;
  line-height: 1.6;
  margin-top: var(--spacing-1);
  padding-bottom: var(--spacing-2);
  font-style: italic;
  padding-top: 0;
}

.date-header {
  border-bottom: 2px solid var(--color-newgreen);
  width: 100%;
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: var(--font-size-f6);
  margin-bottom: var(--spacing-5);
}

.dt-published {
  /* For h-entry microformat */
}

/* ==========================================================================
   Blockquotes
   ========================================================================== */

blockquote {
  border-left: 4px solid var(--color-newgreen);
  padding-left: 10px;
  margin-left: 10px;
  font-style: italic;
}

/* ==========================================================================
   Code Blocks
   ========================================================================== */

pre {
  background-color: black;
  color: white;
  overflow: scroll;
  font-size: 12px;
  padding: var(--spacing-4);
}

code {
  font-family: var(--font-code);
}

.code-block {
  background-color: black;
  color: white;
  overflow: scroll;
  font-size: 12px;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-input {
  background-color: var(--color-near-white);
  width: 100%;
  border: 1px solid var(--color-black-20);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: 0.375rem 0 0 0.375rem;
}

.form-submit {
  width: auto;
  padding: var(--spacing-2) var(--spacing-3);
  border: 1px solid var(--color-newgreen);
  background-color: var(--color-near-white);
  border-radius: 0 0.375rem 0.375rem 0;
  cursor: pointer;
}

/* ==========================================================================
   Decorative Elements
   ========================================================================== */

.greendot {
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--color-newgreen);
  border-radius: 50%;
  margin-top: 7px;
}

.greentimeline {
  position: absolute;
  border-left: 1px solid var(--color-newgreen);
  top: 0;
  left: 50%;
  width: 50%;
  height: 100%;
  z-index: -1;
}

.dottedgreenarrow {
  border-top: 2px dashed var(--color-bright-green);
  margin-top: 10px;
  margin-bottom: 10px;
  position: relative;
}

.dottedgreenarrow::before {
  position: absolute;
  bottom: -5px;
  left: 0;
  content: '';
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-right: 5px solid #00ff00;
}

.dottedgreenarrow::after {
  position: absolute;
  bottom: -4px;
  right: 0;
  content: '';
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 5px solid #00ff00;
}

/* ==========================================================================
   Contact Box
   ========================================================================== */

.contactbox a {
  text-decoration: none;
  border: 4px solid var(--color-bright-green);
  padding: var(--spacing-5);
  transition: all 0.1s;
  display: inline-block;
}

.contactbox a:hover {
  padding: var(--spacing-6);
  box-shadow: none;
}

/* ==========================================================================
   Sidenotes (Tufte-style)
   ========================================================================== */

.sidenote,
.marginnote {
  float: right;
  clear: right;
  margin-right: -35%;
  width: 30%;
  margin-top: 0;
  margin-bottom: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  position: relative;
}

.sidenote-number {
  counter-increment: sidenote-counter;
}

.sidenote-number:after {
  position: relative;
  top: -0.5rem;
  left: 0.1rem;
  content: counter(sidenote-counter);
  font-size: 1rem;
}

.sidenote:before {
  position: relative;
  top: -0.5rem;
  font-size: 0.75rem;
  color: var(--color-sidenote-blue);
  content: counter(sidenote-counter) " ";
}

label.sidenote-number {
  display: inline;
  color: var(--color-sidenote-blue);
  text-decoration: underline;
}

input.margin-toggle {
  display: none;
}

label.margin-toggle:not(.sidenote-number) {
  display: none;
}

/* ==========================================================================
   Responsive Design - Desktop (1024px+)
   ========================================================================== */

@media (min-width: 1024px) {
  .w-two-thirds-ns {
    width: var(--content-width);
  }

  .w-two-thirds-l {
    width: var(--content-width);
  }

  .ph0-l {
    padding-left: 0;
    padding-right: 0;
  }

  .pt5-l {
    padding-top: var(--spacing-5);
  }

  .db-l {
    display: block;
  }

  .dn-l {
    display: none;
  }
}

/* ==========================================================================
   Responsive Design - Mobile (< 1024px)
   ========================================================================== */

@media (max-width: 1023px) {
  .sidebar-nav {
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
  }

  .sidebar-layout {
    margin-left: 0;
  }

  .w-two-thirds-ns {
    width: 100%;
  }

  .ph3-ns {
    padding-left: var(--spacing-3);
    padding-right: var(--spacing-3);
  }

  .sidenote,
  .marginnote {
    display: none;
  }

  label.margin-toggle:not(.sidenote-number) {
    display: inline;
    cursor: pointer;
  }

  .margin-toggle:checked + .sidenote,
  .margin-toggle:checked + .marginnote {
    display: block;
    float: left;
    left: 1rem;
    clear: both;
    width: 95%;
    margin: 1rem 2.5%;
    position: relative;
  }
}

/* ==========================================================================
   Additional Utility Classes
   ========================================================================== */

.h1 { height: var(--spacing-4); }
.h-screen { height: 100vh; }

.no-underline { text-decoration: none; }

.transition-colors { transition: background-color 0.2s, color 0.2s; }

.rounded-lg { border-radius: 0.5rem; }

.overflow-y-auto { overflow-y: auto; }

.z-100 { z-index: 100; }

.break-words { word-wrap: break-word; }

.leading-snug { line-height: 1.375; }
.leading-relaxed { line-height: 1.625; }

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

.cursor-pointer { cursor: pointer; }

/* dt class for date formatting in microformats */
.dt { display: table; }

/* ==========================================================================
   Special Override for Original Styles
   ========================================================================== */

body {
  font-family: var(--font-sans);
}

/* Ensure green link colors override any existing styles */
a:link {
  color: var(--color-newgreen);
  border-bottom: none;
}

a:visited {
  color: var(--color-newgreen);
}

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

/* ==========================================================================
   Feed Entry Styles - More Visual Separation
   ========================================================================== */

.day, .segment, .entry, .blogmark, .quote, .note {
  padding: var(--spacing-6) 0;
  border-bottom: 2px solid var(--color-black-10);
  margin-bottom: var(--spacing-6);
}

.day:last-child, .segment:last-child {
  border-bottom: none;
}

/* Add extra spacing for date headers in feed */
.date-and-tags {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-2);
}

/* ==========================================================================
   Search Bar Styling
   ========================================================================== */

.search-wrapper {
  margin-top: var(--spacing-5);
  margin-bottom: var(--spacing-4);
}

/* Hide sidebar search on search results pages */
body.search-page .sidebar-nav .search-wrapper {
  display: none;
}

.search-form {
  width: 100%;
}

.search-form-wrapper {
  display: flex;
  width: 100%;
  border: 2px solid var(--color-black-20);
  border-radius: 0.5rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
  align-items: stretch;
}

.search-form-wrapper:focus-within {
  border-color: var(--color-primary-blue);
}

.search-input {
  flex: 1;
  min-width: 0;
  padding: var(--spacing-2) var(--spacing-3);
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: var(--font-size-f7);
  background-color: white;
  color: var(--color-text-black);
}

.search-input::placeholder {
  color: var(--color-black-50);
}

.search-submit {
  padding: var(--spacing-2);
  background-color: var(--color-primary-blue);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-sans);
  font-size: 0;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  flex-shrink: 0;
}

.search-submit:before {
  content: "🔍";
  font-size: 16px;
  display: block;
}

.search-submit:hover {
  background-color: #0052a3;
}

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

/* ==========================================================================
   Mobile Header
   ========================================================================== */

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-near-white);
  padding: var(--spacing-3) var(--spacing-4);
  border-bottom: 2px solid var(--color-black-10);
  z-index: 99;
  justify-content: space-between;
  align-items: center;
}

.mobile-header h1 {
  margin: 0;
}

/* Hamburger Menu Button */
.hamburger-button {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 101;
}

.hamburger-button span {
  display: block;
  width: 24px;
  height: 3px;
  background-color: var(--color-text-black);
  transition: all 0.3s ease;
  border-radius: 2px;
}

.hamburger-button.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-button.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-button.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Sidebar Overlay */
.sidebar-nav.mobile-open {
  transform: translateX(0);
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 98;
}

.mobile-overlay.active {
  display: block;
}

@media (max-width: 1023px) {
  .mobile-header {
    display: flex;
  }

  .sidebar-layout {
    margin-top: 60px; /* Account for fixed mobile header */
  }

  .sidebar-nav {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 100;
  }
}