/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=VARIABLES
=VAR-COLOURS
=VAR-SIZES
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
/* CSS Custom Properties for Light-Dark Mode */
:root {
  /* Light mode colors (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-accent: #e2e8f0;
  --bg-nav-accent: #e2e8f0;
  --bg-white-faded: rgba(255, 255, 255, 0.3);
  --bg-white-faded-border: 1px dotted #f1f5f2;
  --placeholder-text: #575757;
  --text-primary: #1a202c;
  --text-secondary: #4a4a4a;
  --text-button: #ffffff;
  --font-light: #ffffff;
  --border-color: #e2e8f0;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --accent-color: #3c5d4a;
  --accent-hover: #1e2f26;
  --border-subtle: #d4d4d4;   /* light grey dividers */
  --border-strong: #3c5d4a;   /* brand border / emphasis */
  --ring: 0 0 0 3px var(--accent-color);
  /* Success */
  --success-main: #2d5f5d;    /* deep teal */
  --success-bg: #c8e6e5;      /* pale success background */
  --success-text: #2d2d2d;
  /* Warning */
  --warning-main: #7d6b2d;    /* dark mustard */
  --warning-bg: #fdf5d9;      /* pale warning background */
  --warning-text: #2d2d2d;
  /* Error */
  --error-main: #6b2d5f;      /* deep magenta */
  --error-bg: #f5d9f0;        /* pale error background */
  --error-text: #2d2d2d;
  /* Info */
  --info-main: #4a3d6b;       /* deep purple */
  --info-bg: #e8e4f3;         /* pale info background */


/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #282828;
    --bg-accent: #4a4a4a;
    --bg-nav-accent: #222222;
    --bg-white-faded: rgba(255, 255, 255, 0.3);  
    --bg-white-faded-border: 1px dotted #f1f5f2;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-button: #1a202c;
    --font-light: #ffffff;
    --border-color: #4a4a4a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --accent-color: #7a9d88;
    --accent-hover: #a0aca4;
    --border-subtle: #404040;   /* medium grey dividers */
    --border-strong: #6b9179;   /* brand border / emphasis */
    --ring: 0 0 0 3px var(--accent-color);
    /* Success */
    --success-main: #5fa6a3;    /* bright teal accent */
    --success-bg: #2d4d4c;      /* dark teal surface */
    --success-text: #e8e8e8;
    /* Warning */
    --warning-main: #c9b56f;    /* bright gold */
    --warning-bg: #4a4229;      /* dark gold surface */
    --warning-text: #e8e8e8;
    /* Error */
    --error-main: #b97aa8;      /* bright magenta */
    --error-bg: #4a2d43;        /* dark magenta surface */
    --error-text: #e8e8e8;
    /* Info */
    --info-main: #9d87c9;       /* bright lavender */
    --info-bg: #3a2f4a;         /* dark purple surface */
    --info-text: #e8e8e8;
  }
}

/* Manual dark mode class override (for user toggle) */
.dark-mode {
  --bg-primary: #1e1e1e;
  --bg-secondary: #282828;
  --bg-accent: #4a4a4a;
  --bg-nav-accent: #222222;
  --bg-white-faded: rgba(255, 255, 255, 0.3);  
  --bg-white-faded-border: 1px dotted #f1f5f2;
  --text-primary: #f7fafc;
  --text-secondary: #e2e8f0;
  --text-button: #1a202c;
  --font-light: #ffffff;
  --border-color: #4a4a4a;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --accent-color: #7a9d88;
  --accent-hover: #a0aca4;
  --border-subtle: #404040;   /* medium grey dividers */
  --border-strong: #6b9179;   /* brand border / emphasis */
  --ring: 0 0 0 3px var(--accent-color);
  /* Success */
  --success-main: #5fa6a3;    /* bright teal accent */
  --success-bg: #2d4d4c;      /* dark teal surface */
  --success-text: #e8e8e8;
  /* Warning */
  --warning-main: #c9b56f;    /* bright gold */
  --warning-bg: #4a4229;      /* dark gold surface */
  --warning-text: #e8e8e8;
  /* Error */
  --error-main: #b97aa8;      /* bright magenta */
  --error-bg: #4a2d43;        /* dark magenta surface */
  --error-text: #e8e8e8;
  /* Info */
  --info-main: #9d87c9;       /* bright lavender */
  --info-bg: #3a2f4a;         /* dark purple surface */
  --info-text: #e8e8e8;
}

  /* Typography scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing scale */
  --spacer-1: 0.25rem;
  --spacer-2: 0.5rem;
  --spacer-3: 0.75rem;
  --spacer-4: 1rem;
  --spacer-6: 1.5rem;
  --spacer-8: 2rem;
  --spacer-12: 3rem;
  --spacer-16: 4rem;
  --spacer-20: 5rem;
  --spacer-24: 6rem;
  --spacer-28: 7rem;
  --spacer-32: 8rem;

  /* Border radius */
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;

  --font-family-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=RESET
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-sans);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  min-width: 350px;
}



/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=UTILITIES
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}


.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-center {
  text-align: center;
}

.text-secondary {
  color: var(--text-secondary);
}

.show-print {
  display: none;
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=TYPOGRAPHY
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  margin-block-end: var(--spacer-4);
  line-height: 1.2;
  font-size: revert;
  font-weight: normal;
}

h1 {
  font-size: var(--font-size-3xl);
}
h2 {
  font-size: var(--font-size-2xl);
}
h3 {
  font-size: var(--font-size-xl);
}
h4 {
  font-size: var(--font-size-base);
}

.hero h1 {
  color: var(--accent-color);
}

.hero p {
  font-size: var(--font-size-lg);
  max-width: 75ch;
}

/* ≤ 979px */
@media (max-width: 980px) {
  .hero a {
    display: inline-block;
    margin-inline: auto;
    margin-block-start: var(--spacer-6);
  }
}

section h2:first-of-type {
  color: var(--accent-color);
  font-weight: 700;
}

section h3 {
  color: var(--text-primary);
}

p {
  text-align: start;
  color: var(--text-primary);
  margin-block-end: var(--spacer-4);
  max-width: 65ch; /* Optimal reading width */
}

p.center {
  margin-inline: auto;
  text-align: center;
}

a.copy,
p a,
p a:visited {
  color: var(--accent-color);
  font-weight: bold; /* for older browsers */
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-color);
}

a.copy:hover,
a.copy:focus,
p a:hover,
p a:focus {
  color: var(--accent-color);
  border: none;
  text-decoration: underline;
}

li p {
  margin: 0;
  padding: 0;
}

footer p a, 
footer p a:visited {
  color: var(--text-primary);
  font-weight: normal;
}

footer p a:hover, footer p a:focus {
  color: var(--accent-color);
}

@media (max-width: 980px) {
  footer P {
    text-align: center;
  }
}

code, 
.code,
p code,
li code,
.card p code {
  font-family: var(--font-family-mono);
}


  pre {
    white-space: pre-wrap;        /* preserve line breaks, allow wrapping */
    overflow-wrap: anywhere;      /* wrap long strings if needed */
    max-width: 100%;
  }

  pre code {
    xwhite-space: inherit;         /* use the pre's wrapping rules */
  }


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=HEADER
=NAVS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding-block: var(--spacer-2);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacer-2);
}

@media (max-width: 480px) {
  .header-content {
    flex-direction: column;
  }
}

#logo {
  display: flex; 
  align-items: start;
  height: 50px;
}

.logo {
  margin: 0;
  padding: 0;
  font-size: var(--font-size-lg);
  font-weight: 400;
  line-height: 1.2;
  color: var(--accent-color);
  text-decoration: none;
  display: inline-block;
}

.logo:hover, .logo:focus {
  color: var(--accent-color);
  text-decoration: underline;
} 

#imgLogo {
  width: 50px;
  height: auto;
  vertical-align: middle;
}

#site-title {
  vertical-align: baseline;
  font-size: var(--font-size-xs);
  line-height: 1.6em;
  font-weight: 400;
  display: block;
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacer-6);
  flex-wrap: wrap;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacer-2) var(--spacer-3);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  position: relative;
}

nav a:hover,
nav a:focus {
  color: var(--accent-color);
  background: var(--bg-nav-accent);
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

nav a[aria-current="page"] {
  color: var(--accent-color);
  background: var(--bg-nav-accent);
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

#footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
}

footer nav#footer-nav a {
  text-decoration: underline;
}

footer nav#footer-nav a:hover,
footer nav#footer-nav a:focus {
  text-decoration: none;
}

@media (max-width: 980px) {
  footer nav#footer-nav a {
    display: inline-block;
    margin-bottom: 0.2em;
  }

  nav ul {
    justify-content: center;
  }
}
/* Burger button */
.burger:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}
.burger .lines {
  position: relative;
  width: 22px;
  height: 16px;
  display: inline-block;
}
.burger .lines::before,
.burger .lines::after,
.burger .lines span {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.burger .lines::before {
  top: 0;
}
.burger .lines span {
  top: 7px;
}
.burger .lines::after {
  bottom: 0;
}
.burger[aria-expanded="true"] .lines::before {
  transform: translateY(7px) rotate(45deg);
}
.burger[aria-expanded="true"] .lines span {
  opacity: 0;
}
.burger[aria-expanded="true"] .lines::after {
  transform: translateY(-7px) rotate(-45deg);
}

.controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* Mobile: menu hidden until expanded */
#site-nav {
  display: none;
}
#site-nav[data-open] {
  display: block;
}
#site-nav .panel {
  padding: 0.5rem 0 1rem;
}
#site-nav .panel ul {
  flex-direction: column;
}

/* Theme toggle button + burger menu */
.theme-toggle,
.burger {
  background: var(--bg-accent);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: var(--font-size-sm);
  padding: var(--spacer-2) var(--spacer-3);
}

.theme-toggle:hover,
.theme-toggle:focus {
  background: var(--accent-color);
  color: white;
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* ≥ 980px: show inline menu, hide burger */
@media (min-width: 980px) {
  .burger {
    display: none;
  }
  #site-nav {
    display: block !important;
  }
  #site-nav .panel {
    padding: 0;
  }
  #site-nav .panel ul {
    flex-direction: row;
  }
}

/* ≤ 979px */
@media (max-width: 980px) {
  .controls {
    background: var(--bg-accent);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: var(--spacer-1) var(--spacer-1);
  }

  .theme-toggle {
    font-size: var(--font-size-xl);
    padding-top: 3px;
  }

  .burger {
    font-size: var(--font-size-sm);
    padding-top: 2px;
    padding-bottom: 2px;
  }
}

@media (max-width: 980px) {
  nav ul {
    justify-content: center;
  }

  footer P {
    text-align: center;
  }
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=LAYOUT
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
.hero {
  text-align: left;
  padding-block: var(--spacer-8);
}
main {
  min-height: 70vh;
  padding-top: var(--spacer-8);
}

.container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--spacer-4);
}

section {
  margin-block-end: var(--spacer-16);
  scroll-margin-top: var(--spacer-16);
}

section:first-of-type {
  margin-block-start: var(--spacer-8);
  margin-block-end: var(--spacer-32);
}

section#page-head.hero {
    margin-block-end: var(--spacer-24);
  }

section.bordered{
  padding: 2em;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}   

.section-header {
  text-align: center;
  margin-block-end: var(--spacer-8);
}   

/* ≤ 979px */
@media (max-width: 980px) {
  section {
    margin-block-end: var(--spacer-16);
    scroll-margin-top: 20rem;
  }

  section:first-of-type {
    margin-block-start: 0;
    margin-block-end: var(--spacer-8);
    padding: 0 1em;
  }

  section, section.bordered {
    padding: 0 1em;
  }

  section.bordered {
    border: none;
  }
}

.section-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
}

footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacer-12);
  margin-block-start: var(--spacer-16);
  text-align: center;
}

/* btn-outline-primer project-caption */

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=CARDS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
/* Card layout with CSS Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacer-6);
  margin-block-start: var(--spacer-8);
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacer-6);
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: all 0.3s ease;
}

#vCont .card {
  margin-block-end: var(--spacer-8);
}

.card-inner {
  max-width: 950px;
  margin: 0 auto;
  padding: 0;
}

.card-body {
  margin-block-start: var(--spacer-8);
}

img.card-img-top {
  width: 100%;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.card h3 {
  font-size: var(--font-size-l);
  color: var(--accent-color);
  margin-block-end: var(--spacer-3);
}

/* ≤ 979px */
@media (max-width: 980px) {
  .card-grid > .card:last-child {
    grid-column: 1 / -1;
    justify-self: center;
  }
}
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=BUTTONS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
.btn,
p a.btn, 
p a.btn:visited {
  display: inline-flex;
  align-items: center;
  gap: var(--spacer-2);
  padding: var(--spacer-3) var(--spacer-6);
  background: var(--accent-color);
  color: var(--text-button);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-base);
}

.btn:hover,
.btn:focus,
p a.btn:hover, 
p a.btn:focus {
  background: var(--accent-hover);
  color: var(--text-button);
  transform: translateY(-1px);
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.btn-secondary {
  background: var(--bg-accent);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--border-color);
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=FORMS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
form#contactform {
  width: 80%;
  margin: 0 auto;
  padding: var(--spacer-16) var(--spacer-32);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

form#contactform fieldset {
  margin: 0;
  padding: 0;
  border: none;
}

label {
  display: block;
  margin-block-start: var(--spacer-4);
  margin-block-end: var(--spacer-4);
  font-weight: 500;
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

input,
textarea,
select {
  width: 100%;
  padding: var(--spacer-3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  transition: all 0.3s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-color: var(--accent-color);
}

::selection {
  color: #ffffff;
  background: #2d5f5d;
}


/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=FILTER
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */  
button.tag-btn {
  padding: var(--spacer-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

.filter-bar .tag-btn[aria-pressed="true"] {
  background: var(--accent-color);
  color: var(--font-light);
  border: none;
}

h3.card-title, h3.card-title a {
  font-size: var(--font-size-l);
  font-weight: 500;
  color: var(--accent-color);
  margin-block-end: var(--spacer-3);
}

.card-grid article {
  max-width: 600px;
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=CONTRAST
=MOTION
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */      
/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: currentColor;
    --shadow-color: transparent;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .card:hover {
    transform: none;
  }

  .btn:hover {
    transform: none;
  }
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=PRINT
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
@page {
  size: A4;
}

@page :left {
  margin: 1cm;
}

@page :right {
  margin: 1cm;
}

@media print {
  * {
    color: #000000 !important;
    background-color: #ffffff !important;
    box-shadow: none !important;
    font-size: 14pt !important;
  }

  body {
    background: white;
    color: black;
  }

  header img {
    filter: grayscale(1);
  }

  h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
  }

  .card {
    /* Legacy property, widely supported */
    page-break-inside: avoid;
    /* Modern alias for better future compatibility */
    break-inside: avoid;
    /* Recommended addition for better support with some complex layouts like flex/grid items */
    box-decoration-break: clone;
  }

  .override-grid-container {
    display: block !important;    
    width: 100% !important;
    grid-template-columns: none !important;
    grid-template-rows: none !important;
    gap: 0 !important;
  }

  .theme-toggle,
  .skip-link,
  nav,
  .controls,
  #site-resources,
  .lines,
  .no-print{
    display: none;
  }

  .show-print {
    display: block;
  }  

  a[href]:after{content:" (" attr(href) ")"}
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
=SKIPLINK
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
  .skip-link {
    position: absolute;
    top: -45px;
    left: var(--spacer-2);
    color: #ffffff;
    background:#0000ff ;
    font-weight: bold;
    padding: var(--spacer-2) var(--spacer-2);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top 0.3s ease;
  }

  .skip-link:focus {
    top: var(--spacer-4);
    color: #ffffff;
  }

  section:focus,
  section:focus-within {
    outline: 1px dotted var(--border-color);
    outline-offset: 4px;
  }


  @view-transition {
    navigation: auto;
  }