/* dsmtech.io — hand-written modern CSS, no frameworks.
   Uses: cascade layers, light-dark(), oklch, color-mix(), native nesting,
   container queries (size + scroll-state), :has(), CSS counters,
   @starting-style + allow-discrete popover animation, text-wrap. */

@layer reset, tokens, layout, components, overlays, a11y, print;

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
  }

  img {
    display: block;
    max-inline-size: 100%;
  }

  button,
  input,
  output {
    font: inherit;
    color: inherit;
  }

  button {
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
  }

  fieldset {
    border: 0;
    padding: 0;
    min-inline-size: 0;
  }

  a {
    color: inherit;
  }
}

@layer tokens {
  :root {
    color-scheme: light dark;

    --font-sans: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto,
      'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas,
      'Liberation Mono', monospace;

    --bg: light-dark(oklch(96.8% 0.003 90), oklch(15% 0.006 255));
    --surface: light-dark(oklch(99.1% 0.0015 90), oklch(17.9% 0.006 255));
    --ink: light-dark(oklch(23% 0.012 260), oklch(92.5% 0.004 90));
    --ink-2: light-dark(oklch(44.5% 0.014 260), oklch(71% 0.009 255));
    --ink-3: light-dark(oklch(57.5% 0.012 260), oklch(55.5% 0.011 255));
    --line: light-dark(oklch(90% 0.004 90), oklch(26.5% 0.008 255));
    --line-strong: light-dark(oklch(84.5% 0.005 90), oklch(32% 0.009 255));
    --accent: light-dark(oklch(50.5% 0.155 252), oklch(74.5% 0.115 252));
    --hover: light-dark(oklch(23% 0.012 260 / 0.034), oklch(92% 0.004 90 / 0.045));

    --green: light-dark(oklch(46% 0.115 152), oklch(80% 0.135 155));
    --blue: light-dark(oklch(48.5% 0.125 252), oklch(78.5% 0.1 252));
    --amber: light-dark(oklch(52.5% 0.105 70), oklch(83% 0.115 85));

    --max: 1280px;
    --pad: clamp(16px, 3vw, 24px);
    --shadow-pop: 0 24px 56px -16px light-dark(oklch(0% 0 0 / 0.28), oklch(0% 0 0 / 0.6)),
      0 4px 14px -6px light-dark(oklch(0% 0 0 / 0.12), oklch(0% 0 0 / 0.5));
  }

  ::selection {
    background: color-mix(in oklab, var(--accent) 28%, transparent);
  }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }
}

@layer layout {
  html {
    height: 100%;
  }

  .sprite {
    display: none;
  }

  body {
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;

    block-size: 100dvh;
    display: grid;
    grid-template-rows: auto auto 1fr auto;
  }

  .wrap {
    max-inline-size: var(--max);
    margin-inline: auto;
    padding-inline: var(--pad);
    inline-size: 100%;
  }

  .bar {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  /* ---- header ---- */

  .site-header {
    border-bottom: 1px solid var(--line);

    .bar {
      block-size: 50px;
    }
  }

  .wordmark {
    font-weight: 650;
    font-size: 14px;
    letter-spacing: -0.01em;
    text-decoration: none;

    span {
      color: var(--accent);
    }
  }

  .site-nav {
    margin-inline-start: auto;
    display: flex;
    align-items: center;
    gap: 18px;
  }

  .navlink {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--ink-2);
    text-decoration: none;
    transition: color 0.12s;

    &:hover {
      color: var(--ink);
    }

    svg {
      inline-size: 14px;
      block-size: 14px;
    }
  }

  /* ---- toolbar ---- */

  .toolbar .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px 24px;
    padding-block: 16px 14px;
  }

  .intro {
    h1 {
      font-size: 15.5px;
      font-weight: 650;
      letter-spacing: -0.012em;
      text-wrap: balance;
    }

    p {
      margin-block-start: 2px;
      font-size: 12.5px;
      color: var(--ink-2);
      text-wrap: pretty;
    }
  }

  /* ---- sheet (the scrolling table region) ---- */

  .sheet {
    background: var(--surface);
    border-block-start: 1px solid var(--line);
    overflow: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--line-strong) transparent;
    container-type: inline-size;
  }

  /* ---- footer ---- */

  .site-footer {
    border-block-start: 1px solid var(--line);

    .bar {
      block-size: 42px;
      justify-content: space-between;
      flex-wrap: wrap;
      font-size: 11.5px;
      color: var(--ink-3);
    }

    a {
      color: var(--ink-2);
      text-decoration: underline;
      text-decoration-color: var(--line-strong);
      text-underline-offset: 3px;
      transition: color 0.12s;

      &:hover {
        color: var(--ink);
      }
    }

    .meta {
      font-family: var(--font-mono);
      font-size: 10.5px;
    }
  }

  @media (width <= 720px) {
    /* Let the page itself scroll (not the nested sheet) so touch scrolling on
       phones feels native — no janky inner scroll container, no sideways drift. */
    body {
      display: block;
      block-size: auto;
      min-block-size: 100dvh;
    }

    .sheet {
      overflow: visible;
    }

    .toolbar .wrap {
      align-items: stretch;
      flex-direction: column;
    }

    .site-footer .bar {
      block-size: auto;
      padding-block: 10px;
      gap: 4px 16px;
    }
  }
}

@layer components {
  /* ---- search ---- */

  search form {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
  }

  .search-box {
    position: relative;
    display: inline-flex;
    align-items: center;

    > svg {
      position: absolute;
      inset-inline-start: 10px;
      inline-size: 13px;
      block-size: 13px;
      color: var(--ink-3);
      pointer-events: none;
    }

    input {
      inline-size: clamp(220px, 26vw, 320px);
      block-size: 32px;
      padding-inline: 31px 30px;
      background: var(--surface);
      border: 1px solid var(--line-strong);
      border-radius: 8px;
      transition: border-color 0.12s, box-shadow 0.12s;

      &::placeholder {
        color: var(--ink-3);
      }

      &::-webkit-search-cancel-button {
        display: none;
      }

      &:focus {
        outline: none;
        border-color: var(--accent);
        box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 16%, transparent);
      }
    }

    kbd {
      position: absolute;
      inset-inline-end: 9px;
      font-family: var(--font-mono);
      font-size: 10px;
      line-height: 1;
      color: var(--ink-3);
      border: 1px solid var(--line-strong);
      border-radius: 4px;
      padding: 3px 5.5px;
      background: var(--bg);
      transition: opacity 0.12s;
      pointer-events: none;
    }

    /* hide the “/” hint once the field is focused or filled */
    &:focus-within kbd,
    &:has(input:not(:placeholder-shown)) kbd {
      opacity: 0;
    }
  }

  @media (hover: none) {
    .search-box kbd {
      display: none;
    }
  }

  @media (width <= 720px) {
    .search-box,
    .search-box input {
      inline-size: 100%;
    }
  }

  /* ---- segmented filter ---- */

  .segmented {
    display: inline-flex;
    gap: 2px;
    padding: 2px;
    background: color-mix(in oklab, var(--ink) 4.5%, var(--bg));
    border: 1px solid var(--line);
    border-radius: 9px;
  }

  .seg {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 6.5px;
    font-size: 12px;
    font-weight: 500;
    color: var(--ink-2);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    transition: color 0.12s, background-color 0.12s;

    input {
      position: absolute;
      inline-size: 1px;
      block-size: 1px;
      opacity: 0;
      pointer-events: none;
    }

    .n {
      font-family: var(--font-mono);
      font-size: 9.5px;
      color: var(--ink-3);
    }

    &:hover {
      color: var(--ink);
    }

    &:has(input:checked) {
      background: var(--surface);
      color: var(--ink);
      box-shadow: 0 0 0 1px var(--line-strong),
        0 1px 2px light-dark(oklch(0% 0 0 / 0.05), oklch(0% 0 0 / 0.3));
    }

    &:has(input:focus-visible) {
      outline: 2px solid var(--accent);
      outline-offset: 1px;
    }
  }

  .hits {
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--ink-3);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
  }

  /* ---- table ---- */

  .companies {
    inline-size: 100%;
    min-inline-size: 1024px;
    max-inline-size: var(--max);
    margin-inline: auto;
    border-collapse: collapse;
    table-layout: fixed;
    font-size: 13px;
  }

  .w-index   { width: 4%; }
  .w-company { width: 19%; }
  .w-desc    { width: 38%; }
  .w-type    { width: 9%; }
  .w-city    { width: 11%; }
  .w-social  { width: 12.5%; }
  .w-careers { width: 6.5%; }

  .companies :is(th, td) {
    text-align: start;

    &:first-child {
      padding-inline-start: var(--pad);
    }

    &:last-child {
      padding-inline-end: var(--pad);
      text-align: end;
    }
  }

  /* header cells — sticky inside .sheet, with a shadow once stuck */
  .companies th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    container-type: scroll-state;
    padding: 9px 12px;
    background: color-mix(in oklab, var(--surface) 86%, transparent);
    backdrop-filter: blur(8px);
    border-block-end: 1px solid var(--line-strong);
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-3);

    &:has(button) {
      padding-block: 0;
    }

    &::after {
      content: '';
      position: absolute;
      inset-inline: 0;
      inset-block-end: -9px;
      block-size: 8px;
      background: linear-gradient(
        to bottom,
        light-dark(oklch(0% 0 0 / 0.06), oklch(0% 0 0 / 0.35)),
        transparent
      );
      opacity: 0;
      transition: opacity 0.15s;
      pointer-events: none;
    }

    @container scroll-state(stuck: block-start) {
      &::after {
        opacity: 1;
      }
    }

    button {
      display: flex;
      align-items: center;
      gap: 5px;
      inline-size: 100%;
      padding-block: 9px;
      font: inherit;
      letter-spacing: inherit;
      text-transform: inherit;
      color: inherit;
      transition: color 0.12s;

      &::after {
        content: '↕';
        opacity: 0;
        transition: opacity 0.12s;
      }

      &:hover {
        color: var(--ink);

        &::after {
          opacity: 0.6;
        }
      }
    }
  }

  .companies th[aria-sort] button::after {
    opacity: 1;
  }

  .companies th[aria-sort='ascending'] button::after {
    content: '↑';
  }

  .companies th[aria-sort='descending'] button::after {
    content: '↓';
  }

  .companies td {
    padding: 9px 12px;
    border-block-end: 1px solid var(--line);
    vertical-align: top;
  }

  tr.co {
    transition: background-color 0.08s;

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

  /* row numbers via CSS counters — renumber automatically as rows hide */
  .companies tbody {
    counter-reset: row;
  }

  tr.co:not([hidden]) {
    counter-increment: row;
  }

  .c-index {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--ink-3);
    text-align: end;
    font-variant-numeric: tabular-nums;
    padding-block-start: 13.5px;

    &::before {
      content: counter(row, decimal-leading-zero);
    }
  }

  th.c-index::before {
    content: none;
  }

  .c-company .org {
    display: flex;
    align-items: center;
    gap: 10px;

    img {
      inline-size: 28px;
      block-size: 28px;
      border-radius: 7px;
      border: 1px solid var(--line);
      background: white;
      flex: none;
    }

    .name {
      font-weight: 570;
      letter-spacing: -0.005em;
    }
  }

  .c-desc {
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--ink-2);
    text-wrap: pretty;
    max-inline-size: 60ch;
  }

  .c-city {
    font-size: 12.5px;
    color: var(--ink-2);
    white-space: nowrap;
  }

  .dim {
    color: var(--ink-3);
    opacity: 0.7;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 9.5px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 999px;
    color: var(--badge, var(--ink-2));
    background: color-mix(in oklab, var(--badge, var(--ink-2)) 9%, transparent);
    border: 1px solid color-mix(in oklab, var(--badge, var(--ink-2)) 24%, transparent);
    white-space: nowrap;

    &::before {
      content: '';
      inline-size: 5px;
      block-size: 5px;
      border-radius: 50%;
      background: currentColor;
    }

    &[data-category='Startup'] { --badge: var(--green); }
    &[data-category='Public']  { --badge: var(--blue); }
    &[data-category='Private'] { --badge: var(--amber); }
  }

  /* social links — quiet, monochrome marks that lift on hover */
  .c-social {
    white-space: nowrap;
  }

  .social {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    inline-size: 24px;
    block-size: 24px;
    margin-block: -4px;
    border-radius: 6px;
    color: var(--ink-3);
    transition: color 0.12s, background-color 0.12s;

    & + & {
      margin-inline-start: 2px;
    }

    svg {
      inline-size: 13px;
      block-size: 13px;
      fill: currentColor;
    }

    &:hover {
      color: var(--ink);
      background: var(--hover);
    }
  }

  .jobs {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 12.5px;
    font-weight: 550;
    color: var(--accent);
    text-decoration: none;
    white-space: nowrap;

    svg {
      inline-size: 11px;
      block-size: 11px;
      transition: translate 0.12s;
    }

    &:hover {
      text-decoration: underline;
      text-underline-offset: 3px;

      svg {
        translate: 1px -1px;
      }
    }
  }

  /* empty state — revealed with :has() when every data row is hidden */
  tr.empty {
    display: none;

    td {
      padding: 56px var(--pad);
      text-align: center;
      color: var(--ink-2);
      border-block-end: 0;
    }

    button {
      margin-block-start: 12px;
      padding: 6px 14px;
      font-size: 12.5px;
      font-weight: 500;
      border: 1px solid var(--line-strong);
      border-radius: 7px;
      background: var(--surface);
      transition: background-color 0.12s, border-color 0.12s;

      &:hover {
        border-color: var(--ink-3);
        background: var(--hover);
      }
    }
  }

  tbody:not(:has(tr.co:not([hidden]))) tr.empty {
    display: table-row;
  }

  /* hide the index column when the sheet gets narrow (container query) */
  @container (width < 600px) {
    .c-index,
    .w-index {
      display: none;
    }
  }

  /* On phones the seven-column table can't fit, so each row reflows into a
     self-contained card. This drops the horizontal scroll that made the table
     hard to read and lets the page scroll cleanly in one direction. */
  @media (width <= 720px) {
    .companies {
      display: block;
      min-inline-size: 0;
    }

    .companies colgroup,
    .companies thead,
    .companies .c-index {
      display: none;
    }

    .companies tbody {
      display: block;
    }

    .companies tr.co {
      display: grid;
      grid-template-columns: auto 1fr auto;
      grid-template-areas:
        'company company type'
        'desc    desc    desc'
        'city    social  careers';
      align-items: center;
      column-gap: 12px;
      row-gap: 8px;
      padding: 14px var(--pad);
      border-block-end: 1px solid var(--line);
    }

    .companies tr.co[hidden] {
      display: none;
    }

    .companies td {
      padding: 0;
      border: 0;
      min-inline-size: 0;
    }

    .c-company {
      grid-area: company;
    }
    .c-desc {
      grid-area: desc;
    }
    .c-type {
      grid-area: type;
    }
    .c-city {
      grid-area: city;
    }
    .c-social {
      grid-area: social;
      justify-self: start;
    }
    .c-careers {
      grid-area: careers;
      justify-self: end;
    }

    .c-company .name {
      font-size: 13.5px;
    }

    .companies tr.empty {
      display: none;
    }

    tbody:not(:has(tr.co:not([hidden]))) tr.empty {
      display: block;
    }
  }
}

@layer overlays {
  /* about popover — light-dismiss for free, animated with @starting-style */
  #about {
    position: fixed;
    inset: 0;
    margin: auto; /* re-center (the * reset removes the UA margin) */
    inline-size: min(560px, calc(100vw - 32px));
    max-block-size: calc(100dvh - 48px);
    overflow: auto;
    border: 1px solid var(--line-strong);
    border-radius: 14px;
    background: var(--surface);
    color: var(--ink);
    padding: 0 0 18px;
    box-shadow: var(--shadow-pop);

    opacity: 0;
    translate: 0 10px;
    scale: 0.98;
    transition: opacity 0.16s ease, translate 0.16s ease, scale 0.16s ease,
      display 0.16s allow-discrete, overlay 0.16s allow-discrete;

    &:popover-open {
      opacity: 1;
      translate: 0;
      scale: 1;

      @starting-style {
        opacity: 0;
        translate: 0 10px;
        scale: 0.98;
      }
    }

    &::backdrop {
      background: light-dark(oklch(20% 0.01 260 / 0.3), oklch(5% 0.01 260 / 0.55));
      backdrop-filter: blur(3px);
    }

    header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 20px 0;

      h2 {
        font-size: 15px;
        font-weight: 650;
        letter-spacing: -0.01em;
      }
    }

    .close {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      inline-size: 28px;
      block-size: 28px;
      border-radius: 7px;
      color: var(--ink-3);
      transition: color 0.12s, background-color 0.12s;

      svg {
        inline-size: 14px;
        block-size: 14px;
      }

      &:hover {
        color: var(--ink);
        background: var(--hover);
      }
    }

    p {
      padding-inline: 20px;
      margin-block-start: 12px;
      font-size: 13px;
      line-height: 1.6;
      color: var(--ink-2);
      text-wrap: pretty;

      a {
        color: var(--ink);
        text-decoration: underline;
        text-decoration-color: var(--line-strong);
        text-underline-offset: 3px;

        &:hover {
          text-decoration-color: var(--ink-3);
        }
      }

      code {
        font-family: var(--font-mono);
        font-size: 11.5px;
        background: var(--hover);
        border: 1px solid var(--line);
        border-radius: 4px;
        padding: 1px 4px;
      }
    }

    footer {
      margin-block-start: 16px;
      padding: 14px 20px 0;
      border-block-start: 1px solid var(--line);
      font-family: var(--font-mono);
      font-size: 10.5px;
      color: var(--ink-3);

      a {
        color: var(--ink-2);
      }
    }
  }
}

@layer a11y {
  .sr-only {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .skip {
    position: absolute;
    inset-block-start: 8px;
    inset-inline-start: 8px;
    z-index: 10;
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    font-size: 12.5px;
    text-decoration: none;
    translate: 0 calc(-100% - 16px);

    &:focus-visible {
      translate: 0;
    }
  }

  /* hide interactive-only controls when JS is unavailable */
  @media (scripting: none) {
    .search-box,
    .segmented,
    .hits {
      display: none;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      transition-duration: 0.01ms !important;
      animation-duration: 0.01ms !important;
    }

    ::view-transition-group(*),
    ::view-transition-old(*),
    ::view-transition-new(*) {
      animation: none !important;
    }
  }
}

@layer print {
  @media print {
    body {
      display: block;
      block-size: auto;
    }

    .sheet {
      overflow: visible;
    }

    .companies {
      min-inline-size: 0;
    }

    .search-box,
    .segmented,
    .hits,
    .site-nav,
    .skip,
    .c-social,
    .w-social {
      display: none;
    }

    .companies th {
      position: static;
    }
  }
}

/* keep view-transition crossfades snappy */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.18s;
}