/* ==========================================================================
   ccc.css — annotated demolition survey (behavior-preserving rewrite)
   ==========================================================================
   Sorted into nine concerns; each banner carries an ASSUMES: line naming
   the tokens and images it depends on. Within any equal-specificity
   collision set, relative source order is preserved verbatim.
   ========================================================================== */

/* ==========================================================================
   1. DESIGN TOKENS
   ==========================================================================
   The desktop layout is a fixed lattice drawn around two images:
   header.png (909px wide, 145px tall) and left_column.png (continues the
   header artwork down the left menu band via a wrapper-covering ::before).
   Change these tokens and the two images must be regenerated — that IS
   the redesign.
   NOTE: custom properties cannot appear in @media conditions, so the
   1015/1016 breakpoint below stays a literal pair. Its provenance is
   unexplained (roughly --page-width plus a margin allowance).
   ========================================================================== */

:root {
  --page-width: 909px;      /* header.png's drawn width; the wrapper.
                               Decomposes: 185 left band (135 col + 50 pad)
                               + 490 center at left 200 + 210 right band
                               (155 col + 55 pad) at left 690. 690 + 210
                               = 900: 9px absorbed silently at the right
                               edge. */
  --header-height: 145px;   /* header.png's pixel height; search box and
                               light-mode toggle hang from its bottom
                               edge. */
  --left-col-width: 135px;  /* left band = this + --left-col-pad = 185px */
  --left-col-pad: 50px;
  --center-left: 200px;     /* 15px gutter beyond the 185px left band */
  --center-width: 490px;
  --right-left: 690px;      /* = --center-left + --center-width */
  --right-width: 155px;     /* right band = this + --right-pad = 210px */
  --right-pad: 55px;
  --search-left: 676px;     /* provenance unknown; sits 14px left of
                               --right-left */
  --toggle-left: 816px;     /* provenance unknown; 140px right of
                               --search-left */
  --burger-right: 54px;     /* provenance unknown */

 /* Paper treatment (document thumbs and cards). Light-mode defaults;
     the effective-dark overrides live with the scheme logic in
     section 3 -- the one place toggle-awareness is implemented. */
  --paper-edge: rgba(128, 128, 128, 0.4);
  --paper-shadow: 2px 3px 8px rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   2. RESET & DOCUMENT SCAFFOLD
   ==========================================================================
   ASSUMES: nothing from the lattice. Element defaults and generic
   utilities only.
   ========================================================================== */

html {
  height: 100%;
  line-height: 1.6rem;
}

body {
  margin: 0;
  padding: 0;
  text-align: center;
  font-family: Verdana, Helvetica, Arial, sans-serif;
  background-color: Canvas;
  color: color-mix(in srgb, CanvasText, #808080 25%);
  hyphens: auto;
  color-scheme: light dark;

  min-height: 100%;
  height: 100%;
}

img {
  max-width: 100%;
}

pre {
  overflow: auto;
}

li {
    line-height: 1.5rem;
    margin-block-start: 1rem;
    margin-block-end: 1rem;
}

dt {
  font-weight: bold;
  margin-bottom: 1em;
}

dd {
  margin-bottom: 1em;
}

.pagination {
  margin-bottom: .5rem;
}

.banner img {
  display: block;
  max-height: 8rem;
  width: auto;
}

/* Single caller: _headline_image.html.erb's image-count caption
   ("N Bilder"), shown only when a gallery has more than one image. */
.right {
  text-align: right;
}

.hide-me {
    display: none;
}

.no_break {
  white-space: nowrap;
}

/* ==========================================================================
   3. COLOR SCHEME & LIGHT/DARK TOGGLE
   ==========================================================================
   ASSUMES: --header-height, --toggle-left (desktop toggle position);
   header.png and left_column.png (the invert(50%) treatment); the nonced
   inline restore script in the layout that re-checks #light-mode before
   first paint (the JS contract: checkbox id "light-mode", state persisted
   by the script). Symmetric blocks: each scheme inverts when the toggle
   is checked. Also owns the --paper-* effective-dark overrides (defaults
   in section 1).
   ========================================================================== */

@media (prefers-color-scheme: light) {
    body:has(#light-mode:checked) {
        color-scheme: dark;
        --paper-edge: rgba(200, 200, 200, 0.35);
        --paper-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06),
                        4px 6px 16px rgba(0, 0, 0, 0.8);
    }
    #light-mode + label[for=light-mode]:before { content: '🌙'; }
    #light-mode:checked + label[for=light-mode]:before { content: '☀️'; }

    /* The header images were set in the before times. Let them shine in dark
       mode, too */
    body:has(#light-mode:checked) #header img,
    body:has(#light-mode:checked) div#left_column::before
    {
        filter: invert(50%);
    }
}

@media (prefers-color-scheme: dark) {
    body:has(#light-mode:checked) {
        color-scheme: light;
    }
    body:not(:has(#light-mode:checked)) {
        --paper-edge: rgba(200, 200, 200, 0.35);
        --paper-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06),
                        4px 6px 16px rgba(0, 0, 0, 0.8);
    }
    #light-mode + label[for=light-mode]:before { content: '☀️'; }
    #light-mode:checked + label[for=light-mode]:before { content: '🌙'; }

    /* The header images were set in the before times. Let them shine in dark
       mode, too */
    body:not(:has(#light-mode:checked)) #header img,
    body:not(:has(#light-mode:checked)) div#left_column::before
    {
        filter: invert(50%);
    }
}

input#light-mode[type="checkbox"] {
    display: none;
}

label[for=light-mode] {
    font-size: 25px;
    user-select: none;
    cursor: pointer;
    filter: grayscale(1) contrast(10%);
}

/* Light and dark mode button magic */
@media(max-width:1015px) {
  div#light-mode-div {
    position: absolute;
    left: 170px;  /* mobile toolbar offset; provenance unknown — anchors to
                     the viewport, not #toolbox (see section 5) */
  }
}

@media(min-width:1016px) {
  div#light-mode-div {
    position: absolute;
    top: var(--header-height);  /* bottom edge of header.png */
    left: var(--toggle-left);
  }
}

/* ==========================================================================
   4. LINKS & HEADINGS
   ==========================================================================
   ASSUMES: nothing from the lattice. Site-wide type and link colors;
   the orange is the one brand color that survives theming.
   ========================================================================== */

a {
  color: #F8921E;
  text-decoration: none;
}

a:hover {
  color: #5b8ca7;
}

h2 {
  font-size: 1.5rem;
  font-family: Helvetica, Arial, sans-serif;
  line-height: 1.75rem;
}

h3 {
  font-size: 1.3rem;
  text-decoration: none;

}

h4 {
  font-size: 1.0rem;
  text-decoration: none;
}

h1, h2, h3, h4 {
  word-wrap: anywhere;
  hyphens:auto;
}

/* ==========================================================================
   5. LAYOUT GRID
   ==========================================================================
   ASSUMES: the full token lattice; header.png (drawn width = --page-width,
   height = --header-height); left_column.png (continues the header art
   down the left band via the ::before at z-index -10).
   KNOWN STRUCTURAL DEBT: all three columns are position:absolute on
   desktop, but #footer lives INSIDE #center_column — a long sidebar can
   overflow past the footer. The column-height assumption is nowhere
   enforced.
   MOBILE ANCHORING: on max-width, #wrapper has no position, so the
   absolutely positioned toolbox children (#burger-div, #search,
   #light-mode-div) anchor to the viewport, not to #toolbox.
   ========================================================================== */

@media(min-width:1016px) {
  div#wrapper {
    position: relative;
    width: var(--page-width);  /* header.png's drawn width */
    margin: 0 auto 0 auto;
    text-align: left;
    min-height: 100%;
  }
}

/* Header */
#header img,
#header > a {
  display: block;
  line-height: 0;
}

div#header img {
  border: none;
}

#left_column {
  line-height: 1.5em;
}

@media(min-width:1016px) {
  div#left_column::before {
	content: " ";
	position: absolute;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	box-sizing: border-box;
    background-image: url(/images/left_column.png);
    background-position: top right;
    background-repeat: no-repeat;
	z-index: -10;
  }
  div#left_column {
    position: absolute;
    left: 0px;
    width: var(--left-col-width);
    min-height: 100px;
    text-align: right;
    padding-right: var(--left-col-pad);  /* left band total: 185px */
  }

  div#left_column > a {
    font-size: 0.8rem;
  }
}

div#center_column {
  padding-bottom: 40px;
}

@media(max-width: 1015px) {
div#center_column {
  padding: 0 15px 40px 15px;
}
}

@media(min-width: 1016px) {
  div#center_column {
    position: absolute;
    background-color: Canvas;
    left: var(--center-left);
    width: var(--center-width);
  }
}

@media(min-width:1016px) {
  div#right_column {
    position: absolute;
    background-color: Canvas;
    padding-left: var(--right-pad);
    left: var(--right-left);   /* = center-left + center-width */
    width: var(--right-width); /* right band total: 210px; 690 + 210 = 900,
                                  9px short of --page-width, absorbed
                                  silently */
    height: 100px;
  }
}

/* Mobile toolbar strip. */
@media(max-width:1015px) {
#toolbox {
    height: 30px;
}
}

.admin_edit_link svg {
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
}

/* Footer */
#footer {
  border-bottom: 1px solid color-mix(in srgb, CanvasText, Canvas 60%);
  border-top: 1px solid color-mix(in srgb, CanvasText, Canvas 60%);
  bottom: 0;
  color: CanvasText;
}

#footer p {
  margin: .5rem auto;
}

#footer a {
  margin-left: 1rem;
  margin-right: 1rem;
  color: CanvasText;
}

/* ==========================================================================
   6. MAIN NAVIGATION & BURGER MENU
   ==========================================================================
   ASSUMES: --burger-right; the checkbox-hack markup order in the layout
   (#toolbox precedes #left_column — the `#toolbox ~ #left_column`
   sibling selectors break if the layout reorders them); left_column.png
   behind the desktop nav. Mobile menu is pure CSS: .menu-checkbox state
   drives both the burger-to-X morph and the menu slide.
   COLLISION SET (order preserved): div.main_navigation ul base rule
   before its min-width override — the override's `padding: 0` must win.
   ========================================================================== */

div.main_navigation ul {
  margin-left: 0;
  padding-left: 15px;   /* dead duplicate `padding-left: 0` removed */
  padding-right: 15px;
  text-align: left;
}


@media(max-width:1015px) {
  div.main_navigation li:not(:first-child):before {
    content: '•';
    margin-left: .3rem;
    margin-right: .6rem;
  }

  div.main_navigation li {
    list-style-type: none;
    display: inline-block;
    line-height: .75rem;
  }
}

@media(min-width:1016px) {
  div.main_navigation ul {
    padding: 0;
    text-align: right;
  }

  div.main_navigation li {
    list-style-type: none;
    line-height: 1.45em;
  }
}

div.main_navigation a {
  text-decoration: none;
  hyphens: none;
}

div.main_navigation a.inactive:hover, div#left_column span.inactive:hover {
  color: color-mix(in srgb, CanvasText, #808080 50%);
}

div.main_navigation a.active:before {
  content: "▸";
}

div.main_navigation a.active {
  color: CanvasText;
  text-decoration: none;
}

div.main_navigation a.inactive, div.main_navigation span.inactive, div#left_column span.inactive {
  color: color-mix(in srgb, CanvasText, #808080 25%);
}

.menu-checkbox {
    display: none;
}

.burger-menu {
    display: none;
    cursor: pointer;
}

#burger-div {
    position: absolute;
    right: var(--burger-right);  /* anchors to the viewport on mobile,
                                    see section 5 */
}

/* Mobile styles */
@media (max-width: 1015px) {
    .burger-menu {
		position: absolute;
		display: flex;
		flex-direction: column;
		transition: transform 0.3s ease, opacity 0.3s ease;
	}
	
	.burger-menu span {
	    display: inline-flex;
        width: 26px;
        height: 4px;
        background: color-mix(in srgb, CanvasText, #808080 25%);
        border-radius: 2px;
        margin: 3px 0;
	    transition: max-height 0.5s ease-in-out, opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
    }

  	#left_column .main_navigation {
		width: 100%;
        position: relative;
	}

    #toolbox ~ #left_column .main_navigation ul {
        transition: max-height 0.2s ease-in-out, transform 0.4s ease-in-out, opacity 0.4s ease;
        overflow: hidden;
        text-align: center;
    }

    #toolbox ~ #left_column .main_navigation:first-of-type ul {
	    transform: translateY(-200px);
        max-height: 0;
		opacity: 0;
        z-index: -10;
    }
    
    /* Show menu when checkbox is checked */
    #toolbox:has(.menu-checkbox:checked) ~ #left_column .main_navigation ul {
        max-height: 400px;
        opacity: 1;
        transform: translateY(0);
    }
	
    .menu-checkbox:checked + .burger-menu span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
    .menu-checkbox:checked + .burger-menu span:nth-child(2) { opacity: 0; }
    .menu-checkbox:checked + .burger-menu span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }
}

/* ==========================================================================
   7. SEARCH
   ==========================================================================
   ASSUMES: --header-height, --search-left (desktop box hangs from
   header.png's bottom edge); viewport anchoring on mobile (section 5).
   ========================================================================== */

/* Search bar */
@media(min-width:1016px) {
  div#search {
    position: absolute;
    top: var(--header-height);  /* bottom edge of header.png */
    left: var(--search-left);
    height: 25px;
    vertical-align: top;
  }
}

@media(max-width:1015px) {
  div#search {
    position: absolute;
    left: 25px;  /* mobile toolbar offset; anchors to the viewport */
    height: 25px;
  }
}

div#search input {
  color: CanvasText !important;
}
div#search input[type=search],
div#search input[type=text] {
  display: block;
  padding: 2px;
  margin: 0px;
  height: 25px;
  width: 132px;
  line-height: 20px;
  border: solid #808080 1px;
  background-color: Canvas;
  border-radius: 5px;
  margin-right: 5px;
  text-indent: 0.5rem;
}

/* ==========================================================================
   8. SIDEBAR WIDGETS (calendar, tags, featured, open erfas)
   ==========================================================================
   ASSUMES: right-column geometry from section 5; div.main_navigation h2
   also picks up the grouped border rule below.
   COLLISION SET (order preserved verbatim): the grouped h2 border rule,
   then the same-specificity div#frontpage_calendar h2 override
   (border-top: none), then the min-width block that re-adds a border-top
   for desktop. Moving the override above the group rule would grow a
   border on the calendar heading.
   ========================================================================== */

div#frontpage_calendar {
  display: none;
  margin-top: 10px;
}

@media(min-width:1016px) {
  div#frontpage_calendar {
    margin-top: 30px;
  }
}

div#frontpage_calendar h2, div#tags h2, div#featured_articles h2, div#open_erfas_today h2, div.main_navigation h2 {
  border-top: none;
  border-bottom: 1px solid color-mix(in srgb, CanvasText, Canvas 60%);
  font-size: 1.1em;
  padding-top: 2px;
  padding-bottom: 2px;
}

div#frontpage_calendar h2 {
  display: none;
  margin-left: auto;
  margin-right: auto;
  padding-left: 0.5em;
  padding-right: 0.5em;
  margin-top: 0;
}

div#open_erfas_today li {
  margin-top: 8px;
  margin-bottom: 8px;
  line-height: 1.25;
}

div#open_erfas_today .event_time {
  font-style: italic;
  font-family: Georgia;
  color: color-mix(in srgb, CanvasText, #808080);
}

@media(min-width:1016px) {
  div#frontpage_calendar h2, div#tags h2, div#featured_articles h2, div#open_erfas_today h2 {
    font-size: 1rem;
  }

  div#frontpage_calendar h2 {
    display: block;
    border-top: 1px solid color-mix(in srgb, CanvasText, Canvas 60%);
    padding: 2px 0;
  }

}

div#frontpage_calendar ul,
div#tags ul,
div#featured_articles ul,
div#open_erfas_today ul {
  padding: 0;
  font-size: 0.9rem;
  line-height: 1.5em;
}

div#featured_articles ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

div#featured_articles li {
  margin: 0;
}

div#featured_articles img {
  max-width: 100%;
  height: auto;
  opacity: .85;
}

div#featured_articles a:hover img {
  opacity: 1;
}

div#frontpage_calendar li {
  margin-bottom: 20px;
}

div#frontpage_calendar li, div#tags li, div#featured_articles li, div#open_erfas_today li {
  list-style-type: none;
}

div#frontpage_calendar li a, div#tags li a, div#featured_articles li a, div#open_erfas_today li a {
  text-decoration: none;
  color: color-mix(in srgb, CanvasText, #808080 25%);
}

div#frontpage_calendar li a:hover,
div#tags li a:hover,
div#featured_articles li a:hover {
  text-decoration: none;
  color: color-mix(in srgb, CanvasText, #808080 50%);
}

/* We don't want the only colourful thing on the site to be pointing
 * somewhere else */
div#featured_articles img {
  filter: grayscale(1);
}

div#tags ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.9rem;
}

div#tags li {
  margin: 0;
  line-height: 1.4;
}

@media(max-width:1015px) {
  div#tags ul,
  div#featured_articles ul {
    justify-content: center;
  }
}

/* ==========================================================================
   9. ARTICLE CONTENT
   ==========================================================================
   ASSUMES: center-column geometry from section 5; TinyMCE emits the
   inline-image classes (style-src unsafe-inline in the CSP exists partly
   for its img[style] output).
   ========================================================================== */

/* Main section */
.article, .article_partial {
  text-align: left;
}

div#center_column h1 {
  font-size: 1.5em;
  line-height: 1.2;
}

div#center_column h2 a {
  color: CanvasText;
  text-decoration: none;
}

div#center_column h2 a:hover {
  color: color-mix(in srgb, CanvasText, #808080 50%);
}

div#center_column h1.headline,
div#center_column h2.headline {
  margin-top: 10px;
}

div#center_column h1.headline {
  font-size: 1.5em;
}

div#center_column .article_partial h2.headline {
  border-top: 1px solid color-mix(in srgb, CanvasText, Canvas 70%);
  padding-top: 30px;
  margin-bottom: 0.3rem;
}

div#center_column .date_and_title_partial h2.headline {
  border-top: none;
  font-size: 1.3rem;
  padding: 0.2rem 0 0 0;
  margin: 0;
}

.date_and_title_partial:nth-child(odd of .date_and_title_partial) {
  background-color: color-mix(in srgb, CanvasText, Canvas 94%);
  border-radius: 6px;
}

div.article_partial h2 a {
  text-decoration: none;
}

div.article_partial {
  margin-bottom: 30px;
}

div.article_partial.date_and_title_partial {
  position: relative;
  padding: 0.35rem 0.6rem 1rem;
  margin-bottom: 0;
  min-height: 4rem;
}

.date_and_title_partial h2.headline a::after {
  content: "";
  position: absolute;
  inset: 0;
}

div.article_partial p.excerpt {
  color: CanvasText;
}

div.author_and_date {
  font-style: italic;
  font-family: Georgia;
  color: color-mix(in srgb, CanvasText, #808080);
  padding-top: .2rem;
  padding-bottom: .8rem;
}

.chapter_partial_layout {
  display: flow-root;
}

.chapter_thumbnail {
  float: right;
  margin: 0.5rem 0 8px 12px;
}

.chapter_thumbnail img {
  max-width: 150px;
  height: auto;
  border-radius: 4px;
  display: block;
}

div#center_column .chapter_partial h2.headline {
  border-top: none;
  padding-top: 0;
}

div#center_column .chapter_partial + .chapter_partial {
  border-top: 1px solid color-mix(in srgb, CanvasText, Canvas 70%);
  margin-top: 1.5rem;
  padding-top: 1.5rem;
}

.article_partial_layout {
  display: flow-root;
}

.article_thumbnail {
  float: right;
  margin: 0.5rem 0 8px 12px;
}

.article_thumbnail img {
  width: 116px;
  height: auto;
  min-height: 82px;   /* 116 / sqrt(2): wider than DIN landscape crops */
  max-height: 164px;  /* 116 * sqrt(2): taller than DIN portrait crops */
  object-fit: cover;
  display: block;

  border-radius: 4px;
  border: 1px solid var(--paper-edge);
  box-shadow: var(--paper-shadow);
}

.article_partial_layout .excerpt {
  margin-top: 0;
}

.inline-image--full {
  width: 100%;
  margin: 1rem 0;
}

.inline-image--half {
  width: 48%;
  margin-bottom: 1rem;
}

.inline-image--left {
  float: left;
  margin-right: 1rem;
}

.inline-image--right {
  float: right;
  margin-left: 1rem;
}

#asset_credits .asset_credit_block {
  display: none;
}

#asset_credits .asset_credit_block.headline_credit {
  display: block;
}

#asset_credits {
  border-top: dotted 1px color-mix(in srgb, CanvasText, Canvas 60%);
}

#asset_credits,
.right {
  font-style: italic;
  font-family: Georgia;
  font-size: 0.9rem;
  color: color-mix(in srgb, CanvasText, #808080);
}

.glightbox-clean .gslide-description {
  background: Canvas !important;
}

.glightbox-clean .gslide-title,
.glightbox-clean .gslide-desc {
  color: CanvasText !important;
}

.headline_document_card {
  display: flex;
  align-items: flex-end;
  gap: 1.5em;
  margin: 1.5em 0;
  text-decoration: none;
}

.headline_document_card_thumb {
  border: 1px solid var(--paper-edge);
  box-shadow: var(--paper-shadow);
  max-width: 180px;
  height: auto;
}

.headline_document_card_info {
  display: flex;
  flex-direction: column;
  gap: 0.3em;
  padding-top: 0.5em;
  padding-bottom: 0.5em;
}

.headline_document_card_titlerow {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-weight: bold;
}

.headline_document_card_meta {
  font-size: 0.85em;
  font-weight: normal;
  color: rgba(128, 128, 128, 0.95);
}

.related_documents {
  margin-top: 1rem;
}

.related_documents_label {
  font-style: italic;
  font-family: Georgia;
  font-size: 0.9rem;
  color: color-mix(in srgb, CanvasText, #808080);
  margin-bottom: 0.3rem;
}

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

.related_document_link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
}