/* tango color palette {{{
   butter       #fce94f  #edd400  #c4a000
   orange       #fcaf3e  #f57900  #ce5c00
   chocolate    #e9b96e  #c17d11  #8f5902
   chameleon    #8ae234  #73d216  #4e9a06
   sky blue     #729fcf  #3465a4  #204a87
   plum         #ad7fa8  #75507b  #5c3566
   scarlet red  #ef2929  #cc0000  #a40000
   aluminium    #eeeeec  #d3d7cf  #babdb6
                #888a85  #555753  #2e3436

}}} */

/* fonts {{{ */

@font-face{
  font-family: 'Source Sans 3';
  font-weight: 200 900;
  font-style: normal;
  font-stretch: normal;
  src: url('../fonts/source-sans-3-variable.woff2') format('woff2-variations');
}

@font-face{
  font-family: 'Source Sans 3';
  font-weight: 200 900;
  font-style: italic;
  font-stretch: normal;
  src: url('../fonts/source-sans-3-variable-italic.woff2') format('woff2-variations');
}

/* }}} */

/* general {{{ */

:root {
  --brand-primary: #3465a4;
  --brand-secondary: #73d216;
  --brand-menu: #cc0000;
  --brand-primary-light: #729fcf;

  --gray: #888a85;
  --gray-light: #babdb6;
  --gray-bg: #eeeeec;

  --body-bg: #fff;
  --body-color: #111;
  --body-color-rgb: 34, 34, 34;

  --font-family: "Source Sans 3", verdana, sans-serif;
  --font-size-xs: 1rem;
  --font-size-sm: 1.125rem;
  --font-size-body: 1.3125rem;

  --font-weight-body: 315;
  --font-weight-normal: 300;
  --font-weight-bold: 600;

  --padding:     1rem;
  --padding-xs:  calc(0.25 * var(--padding));
  --padding-sm:  calc(0.5 * var(--padding));
  --padding-lg:  calc(1.5 * var(--padding));
  --padding-xl:  calc(2.5 * var(--padding));
  --padding-xxl: calc(3.5 * var(--padding));
  --padding-max: calc(4.75 * var(--padding));

  --container-width: 40rem;

  --default-transition: all 0.25s ease-in-out;
}

* {
  box-sizing: border-box;
  font-feature-settings: "kern", "liga", "clig";
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-body);
  line-height: 1.4;
  color: var(--body-color);
  margin: 0;
  padding: var(--padding);
}

/* }}} */

/* elements {{{ */

h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--padding-lg);
  font-weight: var(--font-weight-normal);
  line-height: 1.1;
  letter-spacing: -.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.375rem, 2.2308rem + 0.641vw, 3rem); }
h2 { font-size: clamp(1.875rem, 1.8029rem + 0.3205vw, 2.1875rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.28rem; }
h5 { font-size: 1.14rem; }
h6 { font-size: 1rem; }

h4, h5 {
  font-style: italic;
  padding: var(--padding);
}

p {
  hyphens: auto;
  margin-block: var(--padding);

  & code {
    display: inline;
    padding: var(--padding-xs);
  }

  & small {
    display: inline-block;
    line-height: 1.5;
    font-size: var(--font-size-sm);
  }
}

a {
  color: var(--brand-primary);
  transition: var(--default-transition);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: .125em;
  text-decoration-thickness: .05em;

  &:hover {
    color: var(--brand-secondary);
    text-decoration-color: var(--brand-secondary);
  }

  &:hover img {
    opacity: 0.7;
  }
}

pre {
  white-space: pre-wrap;
  word-wrap: break-word;
}

code {
  display: block;
  font-family: monospace;
  font-size: var(--font-size-xs);
  background-color: var(--gray-bg);
  padding: var(--padding);
  border-radius: var(--padding-sm);
}

blockquote {
  position: relative;
  margin: var(--padding-xxl) ;
  padding: 0;

  & p:last-of-type { margin-bottom: 0; }

  &:before {
    --size: 5rem;
    content: "\201C";
    font-size: var(--size);
    line-height: 1;
    position: absolute;
    left: calc(-2 * var(--padding));
    top: calc(-1 * var(--padding-lg));
    color: var(--gray-light);
  }

  @media (max-width: 420px) {
    margin-inline: var(--padding);

    &:before {
      --size: 4rem;
      left: calc(-1.25 * var(--padding));
    }
  }
}

hr {
  margin: var(--padding-max) 20%;
  border: 0;
  border-top: 1px dashed var(--gray-light);
}

figcaption {
  font-size: var(--font-size-sm);
  font-style: italic;
  margin-top: var(--padding-sm);
  hyphens: auto;
  text-align: center;
}

table {
  width: 100%;
  font-size: var(--font-size-sm);
  border-collapse: collapse;

  & tr {
    border-bottom: 1px solid var(--gray-bg);
    transition: var(--default-transition);

    td {
      height: var(--padding-xxl);
    }
  }

  &.zebra tr:hover {
    background: var(--gray-bg);
  }
}

form {
  display: flex;
  justify-content: center;
  gap: var(--padding-sm);
  flex-wrap: wrap;
  margin-bottom: var(--padding-sm);

  /* honeypot field */
  & .c {
    position: absolute;
    left: -999999999px;
  }
}

input,
.button {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-body);
  padding: var(--padding-sm);
  color: var(--body-color);
  background-color: var(--body-bg);
  border: 1px solid var(--gray);
  border-radius: var(--padding-xs);
  transition: var(--default-transition);
  text-decoration: none;
}

input[type=email] {
  transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
  flex-grow: 1;

  &:focus {
    border-color: var(--brand-primary);
    outline: 0;
    box-shadow: inset 0 1px 1px rgba(var(--body-color-rgb), .075), 0 0 var(--padding-sm) var(--brand-primary-light);
  }
}

input[type=submit],
.button {
  text-align: center;
  background-color: var(--brand-primary);
  border-color: var(--brand-primary-light);
  color: var(--body-bg);
  display: inline-block;
  cursor: pointer;
  padding-inline: var(--padding-lg);

  &:hover {
    background-color: var(--brand-primary-light);
    color: var(--body-bg);
  }
}

img {
  max-width: 100%;
  height: auto;
  transition: var(--default-transition);
}

video, audio {
  display: block;
  width: 100%;
}

strong {
  font-weight: var(--font-weight-bold);
}

.muted {
  color: var(--gray);

  & a {
    color: var(--gray);

    &:hover {
      text-decoration-color: var(--gray);
    }
  }
}

/* }}} */

/* page {{{ */

#container {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

main {
  flex: 1 0 auto;
}

/* }}} */

/* header {{{ */

header.nav {
  text-align: center;
  margin: 0 auto var(--padding);

  & h1 {
    font-size: clamp(2.875rem, 2.7308rem + 0.641vw, 3.5rem);

    & #first { color: var(--body-color); }
    & #last { color: var(--brand-primary); }
    & a { text-decoration: none; }
  }
}

nav {
  & ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    column-gap: var(--padding-lg);
    row-gap: var(--padding-xs);
    justify-content: center;

    @media (max-width: 768px) {
      column-gap: var(--padding);
    }

    @media (max-width: 420px) {
      column-gap: var(--padding-sm);
    }
  }

  & a {
    color: var(--body-color);

    &.active {
      color: var(--brand-primary);
      text-decoration-color: var(--brand-primary);
    }

    &:hover {
      color: var(--brand-menu);
      text-decoration-color: var(--brand-menu);
    }
  }
}

/* }}} */

/* footer {{{ */

footer {
  margin-top: var(--padding-xl);
  text-align: center;

  & .social {
    padding: 0;
    margin-top: 0;
    display: flex;
    justify-content: center;
    gap: var(--padding);

    & li {
      display: inline-block;
    }

    & a {
      display: inline-flex;
      width: var(--padding-xl);
      height: var(--padding-xl);
      justify-content: center;
      align-items: center;
      border-radius: 50%;

      &:hover {
        background: var(--gray-bg);
      }

      & .svg-icon {
        fill: var(--gray-light);
      }
    }
  }

  & .copyright {
    border-top: 1px dashed var(--gray-light);

    & small {
      color: var(--gray);

    }
  }
}

/* }}} */

/* article {{{ */

article {
  margin-bottom: var(--padding-max);

  & h2, & h3, & h4, & h5, & h6 {
    margin-top: var(--padding-xl);
  }

  & h1, & h2, & h3, & h4, & h5, & h6 {
    & a { text-decoration-color: transparent; }
  }

  & header {
    text-align: center;
    margin-bottom: var(--padding-xl);

    & h1, & h2, & h3 {
      margin-bottom: var(--padding-sm);
    }

    & time {
      font-size: var(--font-size-sm);
      color: var(--gray);
    }

    & p {
      margin-top: 0;
      color: var(--gray);
    }
  }

  & ul {
    margin-bottom: var(--padding-lg);

    & li {
      margin-bottom: var(--padding-sm);
    }
  }

  & img {
    display: block;
    margin: 0 auto;
  }

  & a {
    text-decoration-color: var(--brand-primary);
  }

  & p.breathe {
    margin-block: var(--padding-xl);
  }

  & figure {
    margin: var(--padding-xl) 0;

    &.breathe {
      margin-block: var(--padding-max);
    }

    &.content {
      margin-inline: 0;
    }

    @media (min-width: 992px) {
      & figcaption {
        max-width: var(--container-width);
        margin-inline: auto;
      }
    }
  }

  & figure.small img,
  & img.small {
    width: 16rem;
  }

  & .embed-container {
    & iframe {
      display: block;
      aspect-ratio: 16/9;
      width: 100%;
      height: 100%;
      border: 0;
    }

    &.embed-container-4by3 {
      aspect-ratio: 4/3;
    }

  }

  & h3.inline {
    display: inline;
    font-size: var(--font-size-body);
    margin-right: var(--padding-sm);
    font-weight: var(--font-weight-bold);

    &:before {
      content: "";
      display: block;
      margin-top: var(--padding);
    }

    & + p {
      display: inline;
    }
  }

  & .brands {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    row-gap: var(--padding-sm);
    margin-bottom: var(--padding-max);

    & img {
      margin: 0;
      flex-basis: 20%;
      width: 100%;
      min-width: 0;

      @media (max-width: 768px) {
        flex-basis: 25%;
      }

      @media (max-width: 420px) {
        flex-basis: 33%;
      }
    }
  }

  .quote {
    margin: 0;

    &.border:not(.quote + .quote):before,
    &.border:after {
      content: "";
      display: block;
      margin: var(--padding-max) 20%;
      border-top: 1px dashed var(--gray-light);
    }

    &.border:after {
      margin-top: var(--padding-xxl);
    }

    & blockquote {
      margin-bottom: 0;
    }

    & figcaption {
      display: block;
      color: var(--gray);
      font-size: var(--font-size-sm);
      text-align: right;
      margin-block: var(--padding-xs) var(--padding-xl);
      margin-inline: var(--padding-xxl);

      &:before { content: "\2014 \2009"; }

      @media (max-width: 420px) {
        margin-inline: var(--padding);
      }
    }

    & img {
      width: calc(9.5 * var(--padding));
      border-radius: 50%;
      shape-outside: margin-box;
      float: right;
      margin-top: calc(-1 * var(--padding));
      margin-left: var(--padding);
    }

    &:nth-child(even of .quote) {
      & img {
        float: left;
        margin-inline: var(--padding-xl) var(--padding);

        @media (max-width: 420px) {
          margin-left: var(--padding);
        }
      }
    }
  }

  .columns {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--padding-lg);
    font-size: var(--font-size-sm);

    @media (min-width: 992px) {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  @media (min-width: 992px) {
    & figure,
    & header,
    & .wide,
    & .columns {
      margin-inline: calc(-1.5 * var(--padding-max));
    }
  }
}

section.archive {
  margin-top: var(--padding-max);

  & ul {
    list-style-type: none;
    padding: 0;

    & li {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: var(--padding-sm);

      & a:not(:hover) {
        text-decoration-color: transparent;
      }

      & .time,
      & time {
        color: var(--gray);
        text-align: end;
        font-size: var(--font-size-sm);
        flex-shrink: 0;
      }
    }
  }
}

/* }}} */

/* page specific changes {{{ */

article.intro {
  & header {
    margin-block: var(--padding-xl);

    & img {
      max-width: calc(15 * var(--padding));
    }

    @media (min-width: 992px) {
      & img {
        float: left;
        border-radius: 50%;
        shape-outside: circle();
        shape-margin: var(--padding-xs);
        margin-right: var(--padding-sm);
      }

      & h1 {
        text-align: left;
        text-wrap: auto;
        font-size: clamp(2.125rem, 2.125rem + 0.4435vw, 2.4rem);
        padding-block: 1em;
        margin: 0;
      }
    }

    & h1 a:not(:hover) {
      text-decoration-color: var(--brand-primary);
    }
  }

  & h2 {
    margin-block: var(--padding-xl);
  }

  & h3 {
    margin: 0;
  }

  & .circles {
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    grid-template-rows: repeat(17, 1fr);
    margin: var(--padding-max) 0;
    padding-bottom: var(--padding-lg);
    position: relative;

    @media (min-width: 992px) {
      margin-inline: var(--padding-xl);
    }

    & .circle {
      border: 2px solid var(--brand-primary);
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      aspect-ratio: 1;
      text-align: center;
      padding: var(--padding-xl);
      transition: var(--default-transition);
      animation: morph 15s ease-in-out infinite;

      &:hover {
        border-color: var(--brand-secondary);
        z-index: 2;
      }

      &.consulting {
        grid-column: 5 / span 10;
        grid-row: 1 / span 10;
      }
      &.bii {
        grid-column: 1 / span 10;
        grid-row: 8 / span 10;
        animation-delay: -5s;
      }
      &.writing {
        grid-column: 9 / span 10;
        grid-row: 8 / span 10;
        flex-direction: column;
        animation-delay: -11s;
      }
    }

    & a:not(:hover) {
      text-decoration-color: transparent;
    }
  }
}

@keyframes morph {
  0%, 100% { border-radius:  50% }
  25% { border-radius: 60% 40% 45% 60% / 60% 40% 60% 40%; }
  50% { border-radius: 60% 40% 40% 60% / 50% 40% 60% 50%; }
  75% { border-radius: 40% 60% 70% 40% / 50% 60% 50% 60%; }
}

article.consulting {
  & ul.help {
    @media (min-width: 992px) {
      display: grid;
      grid-template-columns: 1fr 1fr;
      column-gap: var(--padding-xl);
    }
  }

  & .services {
    overflow-x: auto;
    margin-bottom: var(--padding-max);

    & table {
      table-layout: fixed;
      font-size: var(--font-size-xs);
      margin-bottom: var(--padding);

      & th {
        font-weight: var(--font-weight-body);
      }

      & tbody {
        & tr {
          height: var(--padding-max);

          & th {
            text-align: left;
          }

          & td {
            text-align: center;
          }
        }
      }

      @media (max-width: 768px) {
        table-layout: auto;

        & th {
          min-width: 20vw;
          padding: var(--padding-xs);
        }
      }

      @media (min-width: 992px) {
        font-size: var(--font-size-sm);
      }
    }
  }

  & table.details {
    margin-bottom: var(--padding-max);

    & th {
      text-align: left;
    }

    & td {
      hyphens: auto;
    }
  }

  & .selection {
    @media (min-width: 992px) {
      text-align: center;
    }
  }

  & .columns {
    & ul {
      font-size: var(--font-size-xs);
      padding-inline-start: var(--padding);
    }

    & h3 {
      margin-block: 0 var(--padding);
    }

    @media (min-width: 992px) {
      & h3 {
        margin-block-start: var(--padding-sm);
        font-size: 1.45rem;
      }
    }

    picture {
      --bg: var(--body-bg);
      display: block;
      background: var(--bg);
      padding: var(--padding-lg) var(--padding-lg) 0;

      @media (min-width: 992px) {
        padding: var(--padding) var(--padding) 0;
      }

      img {
        border-top-left-radius: var(--padding-xs);
        border-top-right-radius: var(--padding-xs);
        box-shadow: calc(-1 * var(--padding-sm)) calc(-1 * var(--padding-sm)) var(--padding-sm) calc(-1 * var(--padding-xs)) rgba(var(--body-color-rgb), .1),
                    var(--padding-sm) calc(-1 * var(--padding-sm)) var(--padding-sm) calc(-1 * var(--padding-xs)) rgba(var(--body-color-rgb), .1);
      }
    }
  }
}

article.talk {
  & .references {
    font-size: var(--font-size-xs);

    & p {
      margin-block: 0 var(--padding-xs);
    }
  }
}

article.talks {
  & h2, & h3 {
    text-align: center;
    margin-top: var(--padding-max);
  }
}

article.quotes {
  & .quote {
    position: relative;

    &:not(.quote + .quote):before,
    &:after {
      content: "";
      display: block;
      margin: var(--padding-xl) 20%;
      border-top: 1px dashed var(--gray-light);
    }

    & blockquote {
      font-size: 1.125rem;
    }

    & .permalink {
      display: none;
      position: absolute;
      left: calc(-1 * var(--padding-lg));
      padding: 0 var(--padding-sm) var(--padding);
      text-decoration: none;
    }

    &:hover .permalink {
      display: block;
    }
  }
}

/* }}} */

/* custom blocks {{{ */

.box {
  border-radius: var(--padding-xs);
  padding: var(--padding);
  background: var(--gray-bg);

  a {
    text-decoration: none;
  }
}

.box-border {
  border-radius: var(--padding-xs);
  padding: 0 var(--padding);
  border: 1px solid var(--gray);
  margin-bottom: var(--padding-lg);
}

.feedback {
  position: fixed;
  right: var(--padding);
  bottom: 0;
  width: calc(22 * var(--padding));
  box-shadow: 0px var(--padding-sm) var(--padding-lg) rgba(var(--body-color-rgb), .25);
  background-color: var(--brand-primary);
  border-radius: var(--padding-sm) var(--padding-sm) 0 0;
  font-size: var(--font-size-sm);
  transform: translateY(100%);
  transition: var(--default-transition);

  @media (max-width: 768px) {
    width: 100%;
    right: 0;
    border-radius: 0;
  }

  & .feedback-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--padding-sm) var(--padding);
    color: var(--body-bg);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xs);
    text-decoration: none;

    &:after {
      float: right;
      content: "\203a";
      font-size: 20px;
      transform: rotate(-90deg);
      transition: var(--default-transition);
    }
  }

  & .feedback-content {
    background: var(--body-bg);
    margin: 0 var(--padding-xs) var(--padding-xs);
    padding: var(--padding);
    border-radius: var(--padding-xs);

    & p { margin-top: 0; }
  }

  &.active { transform: translateY(calc(100% - 2.75rem)); }

  &.open {
    transform: translateY(0);

    & .feedback-button:after { transform: rotate(90deg); }
  }
}

.center {
  text-align: center;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: var(--padding-sm);
  align-items: center;
}

/* }}} */