/* ============================================================
   Teletext portfolio — Juuso Issakainen
   Eight-colour teletext palette, 40-column grid, modern UX.
   No inline styles anywhere: the page ships a strict CSP.
   ============================================================ */

:root {
  /* The eight teletext colours, unmodified. */
  --tt-black: #000;
  --tt-red: #f00;
  --tt-green: #0f0;
  --tt-yellow: #ff0;
  --tt-blue: #00f;
  --tt-magenta: #f0f;
  --tt-cyan: #0ff;
  --tt-white: #fff;

  /* Pure blue on black is 2.4:1 and fails WCAG AA. It is allowed as
     decoration only; anything readable uses this lightened variant. */
  --tt-blue-text: #6a7cff;

  /* Dimmed white for de-emphasised text — still 8.9:1 on black. */
  --tt-dim: #9d9d9d;
  --tt-font:
    ui-monospace, "SF Mono", sfmono-regular, menlo, consolas, "Liberation Mono", monospace;
  --tt-cols: 40;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: #080808;
  color-scheme: dark;
}

body {
  margin: 0;
  background: #080808;
  color: var(--tt-white);
  font-family: var(--tt-font);
}

/* The screen. Font size is derived from the viewport so that ~40 characters
   always fit the width, from a 320px phone upwards — the teletext grid stays
   intact instead of reflowing into a different layout. */
.tt-screen {
  width: 42ch;
  max-width: 100%;
  min-height: 100dvh;
  margin-inline: auto;
  padding-inline: 1ch;
  padding-block: 1em;
  display: flex;
  flex-direction: column;
  gap: 1em;
  background: var(--tt-black);
  font-size: clamp(11px, calc(100vw / 26), 18px);
  line-height: 1.25;
}

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

.tt-header__row {
  display: flex;
  justify-content: space-between;
  gap: 1ch;
  margin: 0;
  color: var(--tt-black);
  background: var(--tt-yellow);
  padding-inline: 0.5ch;
  white-space: nowrap;
  overflow: hidden;
}

.tt-header__name {
  overflow: hidden;
  text-overflow: ellipsis;
}

.tt-header__clock {
  font-variant-numeric: tabular-nums;
}

/* ---------- pages ---------- */

.tt-main {
  flex: 1;
}

.tt-page {
  display: none;
}

/* Routing without JavaScript. :target does the work; the :has() rule below
   picks the index page when no hash is present. JS adds .is-current for
   focus management and to cover browsers without :has(). */
.tt-page:target,
.tt-page.is-current {
  display: block;
}

.tt-main:not(:has(.tt-page:target)) #p100 {
  display: block;
}

.tt-page:focus {
  outline: none;
}

/* ---------- double-height text (the classic teletext effect) ---------- */

.tt-dh {
  display: block;
  margin: 0 0 1.3em;
  font-size: 1em;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.15ch;
  transform: scaleY(2);
  transform-origin: left top;
}

.tt-dh--yellow {
  color: var(--tt-yellow);
}

.tt-dh--green {
  color: var(--tt-green);
}

.tt-dh--cyan {
  color: var(--tt-cyan);
}

.tt-dh--magenta {
  color: var(--tt-magenta);
}

.tt-dh--red {
  color: var(--tt-red);
}

.tt-mosaic {
  margin: 0;
  color: var(--tt-blue-text);
  letter-spacing: -0.05ch;
  overflow: hidden;
  white-space: nowrap;
}

/* ---------- colour utilities ---------- */

.tt-green {
  color: var(--tt-green);
}

.tt-cyan {
  color: var(--tt-cyan);
}

.tt-yellow {
  color: var(--tt-yellow);
}

.tt-dim {
  color: var(--tt-dim);
}

/* ---------- index page ---------- */

.tt-tagline {
  margin: 0 0 0.75em;
}

/* Flex + gap rather than an adjacent-sibling rule: it keeps the selector
   specificity flat, which the stylelint ordering rules care about. */
.tt-index__list {
  display: flex;
  flex-direction: column;
  gap: 0.35em;
  list-style: none;
  margin: 1em 0;
  padding: 0;
}

.tt-index__no {
  display: inline-block;
  min-width: 4ch;
  color: var(--tt-green);
}

.tt-hint {
  color: var(--tt-dim);
  margin: 1.5em 0 0;
}

.tt-hint kbd {
  font: inherit;
  color: var(--tt-black);
  background: var(--tt-dim);
  padding-inline: 0.4ch;
}

/* ---------- rows (work, contact) ---------- */

.tt-rows {
  list-style: none;
  margin: 0 0 1em;
  padding: 0;
}

.tt-rows li {
  display: flex;
  gap: 1ch;
  margin-bottom: 0.4em;
}

.tt-rows__year {
  flex: 0 0 5ch;
}

.tt-rows__what {
  min-width: 0;
  overflow-wrap: anywhere;
}

/* ---------- skills ---------- */

.tt-skills {
  margin: 0;
}

.tt-skills dt {
  margin-top: 1em;
}

.tt-skills dd {
  margin: 0.2em 0 0;
  overflow-wrap: anywhere;
}

/* ---------- projects ---------- */

.tt-card {
  margin-bottom: 1.5em;
}

.tt-card h3 {
  font-size: 1em;
  margin: 0 0 0.35em;
}

.tt-card p {
  margin: 0 0 0.4em;
}

.tt-card code {
  font: inherit;
  color: var(--tt-green);
}

/* ---------- links & focus ---------- */

a {
  color: var(--tt-white);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--tt-yellow);
}

:focus-visible {
  outline: 0.15em solid var(--tt-white);
  outline-offset: 0.15em;
}

.tt-skip {
  position: absolute;
  left: -9999px;
}

.tt-skip:focus {
  position: static;
  display: inline-block;
  padding: 0.3em 1ch;
  color: var(--tt-black);
  background: var(--tt-yellow);
}

/* ---------- fastext bar ---------- */

.tt-fastext ul {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5ch;
  list-style: none;
  margin: 0;
  padding: 0.5em 0 0;
  border-top: 0.15em solid var(--tt-dim);
}

.tt-fastext a {
  display: block;
  text-decoration: none;
  text-align: center;
  padding-block: 0.2em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tt-fastext a::before {
  content: "\25a0\00a0";
}

.tt-fastext__red a {
  color: var(--tt-red);
}

.tt-fastext__green a {
  color: var(--tt-green);
}

.tt-fastext__yellow a {
  color: var(--tt-yellow);
}

.tt-fastext__cyan a {
  color: var(--tt-cyan);
}

.tt-fastext a:hover,
.tt-fastext a:focus-visible {
  text-decoration: underline;
}

/* ---------- motion ---------- */

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