/* Global theme variables and shared layout */
:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-link: #000000;
  --color-meta: #666666;
  --color-hover-bg: #f2f2f2;
  --color-border: #e0e0e0;
  --link-color: var(--color-link);
  --color-text-inverse: #ffffff;
  --color-grid-line: rgba(0, 0, 0, 0.04);
  /* Shadows */
  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-strong: 0 14px 36px rgba(0, 0, 0, 0.1);

  /* Icon filters */
  --icon-filter-light: grayscale(100%);
  --icon-filter-dark: brightness(0) invert(1) contrast(1.1);
  --icon-filter: var(--icon-filter-light);
  --service-icon-filter: var(--icon-filter);
  --link-icon-filter: none;
  --icon-hover-filter: none;

  /* Leaf overlays */
  --leaf-filter-light: none;
  --leaf-filter-dark: brightness(1.6);
  --leaf-filter: var(--leaf-filter-light);

  /* Toggle surfaces */
  --toggle-bg-light: rgba(255, 255, 255, 0.85);
  --toggle-bg-dark: rgba(15, 17, 21, 0.92);
  --toggle-bg: var(--toggle-bg-light);
  --toggle-dark-filter: none;
  --toggle-moon-color-light: #ffffff;
  --toggle-moon-color-dark: #ffffff;
  --toggle-moon-color: var(--toggle-moon-color-light);

  /* Layout */
  --sidebar-width: 200px;
  --max-content-width: 700px;
  --side-padding: 2rem;

  /* Fonts */
  --font-body: "Montserrat", sans-serif;
  --font-heading: "Playfair Display", serif;
  --font-sans: var(--font-body);
  --font-serif: var(--font-heading);

  /* Font Sizes */
  --font-size-base: clamp(16px, 1.1vw, 18px);
  --font-size-nav: 1.1rem;
  --font-size-social: 1.1rem;
  --font-size-body: 1.1rem;
  --font-size-post-title: 1.3rem;
  --font-size-meta: 0.9rem;
  --font-size-timeline-year: 9rem;
  --font-size-timeline-heading: 1.3rem;
  --font-size-timeline-text: 1.1rem;
  --font-size-timeline-year-mobile: 10rem;
  --font-size-timeline-heading-mobile: 1.1rem;
  --font-size-timeline-text-mobile: 0.9rem;
  --font-size-nav-mobile: 1rem;
  --font-size-hero: 8rem;
  --font-size-hero-tablet: 5rem;
  --font-size-hero-mobile: 4rem;
  --font-size-card-title: 1.05rem;
  --font-size-card-text: 0.95rem;
  --font-size-icon-lg: 2rem;
}

:root[data-theme="dark"] {
  --color-bg: #0a0a0d;
  --color-text: #e6e7ea;
  --color-link: #f3f4f6;
  --color-meta: #9aa0aa;
  --color-hover-bg: #131316;
  --color-border: #1a1b1f;
  --color-text-inverse: #0a0a0d;
  --color-grid-line: rgba(255, 255, 255, 0.05);
  --icon-filter: var(--icon-filter-dark);
  --service-icon-filter: var(--icon-filter);
  --link-icon-filter: invert(1) brightness(1.8);
  --icon-hover-filter: var(--icon-filter-dark);
  --leaf-filter: var(--leaf-filter-dark);
  --toggle-bg: var(--toggle-bg-dark);
  --toggle-dark-filter: none;
  --toggle-moon-color: var(--toggle-moon-color-dark);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #0a0a0d;
    --color-text: #e6e7ea;
    --color-link: #f3f4f6;
    --color-meta: #9aa0aa;
    --color-hover-bg: #131316;
    --color-border: #1a1b1f;
    --color-text-inverse: #0a0a0d;
    --color-grid-line: rgba(255, 255, 255, 0.05);
    --icon-filter: var(--icon-filter-dark);
    --service-icon-filter: var(--icon-filter);
    --icon-hover-filter: var(--icon-filter-dark);
    --leaf-filter: var(--leaf-filter-dark);
    --toggle-bg: var(--toggle-bg-dark);
    --toggle-moon-color: var(--toggle-moon-color-dark);
  }
}

/* Explicitly declare color schemes for form controls/scrollbars */
html {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
  }
}

/* Typography */
p {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
}

html {
  font-size: var(--font-size-base);
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.article-container {
  max-width: var(--max-content-width);
  margin-left: var(--sidebar-width);
  padding: 1rem var(--side-padding);
  padding-bottom: 1rem;
  box-sizing: border-box;
  text-align: left;
  transition: margin-left 0.3s ease;
}

.article-container a {
  text-decoration: underline;
}

.article-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1rem 0 0.5rem;
  font-family: var(--font-body);
  font-size: var(--font-size-meta);
  color: var(--color-meta);
}

.article-breadcrumbs a {
  color: inherit;
  text-decoration: none;
}

.article-breadcrumbs a:hover,
.article-breadcrumbs a:focus-visible {
  text-decoration: underline;
}

.article-container .article-meta {
  display: block;
  margin-top: -0.4rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-body);
  font-size: var(--font-size-meta);
  line-height: 1.4;
  color: var(--color-meta);
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
}

.home-page {
  background-color: var(--color-bg);
  background-image:
    linear-gradient(0deg, var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-attachment: fixed;
}

h1.large {
  font-size: var(--font-size-hero);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 2rem 0;
  font-family: var(--font-heading);
}

h1 {
  font-size: 3rem;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--sidebar-width);
  background-color: var(--color-bg);
  border-right: 1px solid var(--color-border);
  padding-top: 4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
  z-index: 100;
}

.nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links li {
  width: 100%;
}

.nav-links a {
  display: block;
  padding: 1rem 1.5rem;
  padding-left: 2.3rem;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-nav);
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active,
.social-links a:hover {
  color: var(--link-color);
}

.nav-links a:focus-visible {
  outline: none;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 0 1.5rem 2rem 1.5rem;
}

.social-links a {
  display: flex;
  align-items: center;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-social);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

.social-links img {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  filter: var(--icon-filter);
  align-items: center;
  opacity: 0.9;
  transition:
    filter 0.2s ease,
    opacity 0.2s ease;
}

.social-links a:hover img,
.social-links a:active img,
.social-links a:focus-visible img {
  filter: var(--icon-hover-filter);
  opacity: 1;
}

.social-links a[href="/"],
.social-links a[href="/index.html"],
.social-links a[href="/aboutme"],
.social-links a[href="/aboutme.html"],
.social-links a[href="/blogpage"],
.social-links a[href="/blogpage.html"],
.social-links a[href="/photos"],
.social-links a[href="/photos.html"],
.social-links a[href="/photos/photos.html"],
.social-links a[href="/projects"],
.social-links a[href="/projects.html"] {
  display: none;
}

.theme-toggle {
  position: fixed;
  top: max(12px, env(safe-area-inset-top, 0px));
  right: max(14px, env(safe-area-inset-right, 0px));
  left: auto;
  margin-left: 0;
  z-index: 1100;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 10px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--toggle-bg);
  color: var(--color-text);
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
  pointer-events: auto;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background-color: var(--color-hover-bg);
  color: var(--color-link);
  outline: none;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.1);
}

.theme-toggle img {
  width: 22px;
  height: 22px;
  display: block;
  margin: 0;
}

.theme-toggle [data-theme-icon="dark"] {
  color: var(--toggle-moon-color);
  filter: var(--toggle-dark-filter);
}
.theme-toggle [data-theme-icon="light"] {
  color: var(--color-text);
}
:root[data-theme="dark"] .theme-toggle [data-theme-icon="dark"] {
  filter: brightness(0) invert(1);
  color: #ffffff;
}
:root .theme-toggle [data-theme-icon="light"] {
  display: inline-block;
}
:root .theme-toggle [data-theme-icon="dark"] {
  display: none;
}
:root[data-theme="dark"] .theme-toggle [data-theme-icon="light"] {
  display: none;
}
:root[data-theme="dark"] .theme-toggle [data-theme-icon="dark"] {
  display: inline-block;
}

@media (max-width: 900px) {
  .sidebar {
    width: var(--sidebar-width);
  }

  .article-container {
    margin-left: var(--sidebar-width);
    padding: 1rem 1.5rem;
    padding-bottom: 1rem;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: var(--sidebar-width);
  }

  .social-links a span {
    display: none;
  }

  .nav-links a {
    font-size: var(--font-size-nav-mobile);
  }

  .article-container {
    margin-left: 160px;
    padding: 1rem 1.2rem;
    padding-bottom: 1rem;
  }

  h1.large {
    font-size: var(--font-size-hero-tablet);
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 2rem 0;
    font-family: var(--font-heading);
  }
  h1 {
    font-size: 2rem;
  }
}

@media (max-width: 860px), (hover: none) and (pointer: coarse) and (orientation: landscape) and (max-height: 500px) {
  .theme-toggle {
    margin-left: 0;
    right: 12px;
    left: auto;
  }

  body {
    padding-bottom: calc(4.75rem + env(safe-area-inset-bottom, 0px));
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .sidebar {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    z-index: 900;
    border: none;
    border-top: 1px solid var(--color-border);
    padding: 0.3rem 0.8rem calc(0.5rem + env(safe-area-inset-bottom, 0px));
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    background: var(--color-bg);
    box-shadow: 0 -8px 20px rgba(0, 0, 0, 0.06);
    z-index: 200;
  }

  .nav-links {
    display: none;
  }

  .article-container {
    margin: 0 auto;
    padding: 1rem 1rem calc(4.5rem + env(safe-area-inset-bottom, 0px));
    padding-bottom: 1rem;
    max-width: 90%;
  }

  .article-breadcrumbs {
    margin-top: clamp(4.5rem, 12vw, 6.5rem);
  }

  .social-links {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    padding: 0.2rem 0;
    width: 100%;
  }

  .social-links a {
    justify-content: center;
  }

  .social-links a span {
    display: none;
  }

  .social-links a[href="/"],
  .social-links a[href="/index.html"],
  .social-links a[href="/aboutme"],
  .social-links a[href="/aboutme.html"],
  .social-links a[href="/blogpage"],
  .social-links a[href="/blogpage.html"],
  .social-links a[href="/photos"],
  .social-links a[href="/photos.html"],
  .social-links a[href="/photos/photos.html"],
  .social-links a[href="/projects"],
  .social-links a[href="/projects.html"] {
    display: inline-flex;
  }

  h1.large {
    font-size: var(--font-size-hero-mobile);
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 2rem 0;
    font-family: var(--font-heading);
  }
  h1 {
    font-size: 2rem;
  }

  .social-links img {
    width: 24px;
    height: 24px;
    margin: 0;
  }
}

@keyframes fadeInOpacity {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

::selection {
  background: #d6d6d6;
  color: #000;
}

::-moz-selection {
  background: #d6d6d6;
  color: #000;
}