/* petko-ai.dev: the one stylesheet for both pages (HR + EN).
   Amber CRT terminal aesthetic (IBM 5151 / VT220), mobile-first, WCAG AA contrast. */

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/IBMPlexMono-Regular.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/IBMPlexMono-SemiBold.woff2") format("woff2");
}

:root {
  color-scheme: dark;
  --bg: #0c0904;
  --screen: #120d05;
  --fg: #ffb000;
  --fg-dim: #b88400;
  --fg-bright: #ffd27a;
  --glow: rgb(255 176 0 / 0.35);
  --rule: #5a4100;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

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

html {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.6vw + 8px, 18px);
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0.5rem;
  min-height: 100vh;
}

/* Centred CRT terminal window */
.terminal {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 80ch;
  min-height: calc(100vh - 1rem);
  margin: 0 auto;
  background-color: var(--screen);
  border: 1px solid var(--rule);
  box-shadow:
    0 0 28px rgb(0 0 0 / 0.85),
    0 0 2px var(--rule),
    inset 0 0 24px rgb(255 176 0 / 0.04);
  text-shadow: 0 0 4px var(--glow);
}

/* Vignette darkening the window corners */
.terminal::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    rgb(0 0 0 / 0.42) 100%
  );
  pointer-events: none;
  z-index: 2;
}

/* Static horizontal scanline overlay (3-4% dark lines) */
.terminal::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    rgb(0 0 0 / 0.04) 2px,
    rgb(0 0 0 / 0.04) 4px
  );
  pointer-events: none;
  z-index: 3;
}

/* Subtle boot-only flicker and visual overlay (sits over content with zero layout shift) */
@keyframes boot-flicker {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.96;
  }
}

.boot-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  padding: 0.85rem;
  background-color: var(--screen);
  overflow: hidden;
  animation: boot-flicker 0.12s steps(2, end) infinite;
}

.boot-line {
  margin: 0 0 0.25rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Window title bar */
.title-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg);
  border-bottom: 1px solid var(--rule);
  font-size: 0.9em;
}

.title-bar-label {
  color: var(--fg-dim);
}

.lang-nav,
.status-lang {
  display: inline-flex;
  align-items: center;
  gap: 0.35ch;
  white-space: nowrap;
}

.lang-current {
  display: inline-block;
  padding: 0 0.35ch;
  background-color: var(--fg);
  color: var(--screen);
  font-weight: 600;
  text-shadow: none;
}

/* Banner: mobile-first collapsed plain bold text; ASCII art at >= 30rem */
.ascii-banner {
  display: none;
  margin: 0.85rem 0 0.25rem;
  padding: 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.95em;
  font-weight: 600;
  line-height: 1.15;
  color: var(--fg-bright);
  text-shadow: 0 0 6px var(--glow);
  overflow-x: auto;
}

.banner-fallback {
  display: block;
  margin: 0.75rem 0 0.15rem;
  padding: 0 0.85rem;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--fg-bright);
  text-shadow: 0 0 6px var(--glow);
}

/* Main session area */
.terminal-body {
  flex: 1 0 auto;
  padding: 0.5rem 0.85rem 1.25rem;
}

.cmd-block {
  margin-bottom: 1.1rem;
}

.cmd-block:focus:not(:focus-visible) {
  outline: none;
}

.cmd-block:focus-visible {
  outline: 2px solid var(--fg-bright);
  outline-offset: 4px;
}

.prompt {
  margin: 0.9rem 0 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

.cmd-block:first-child .prompt {
  margin-top: 0.35rem;
}

.prompt-prefix {
  color: var(--fg-dim);
  font-weight: 400;
}

.prompt-cmd {
  color: var(--fg-bright);
  font-weight: 600;
}

.cmd-output {
  margin: 0;
  padding-left: 1.5ch;
  overflow-wrap: break-word;
}

.cmd-output p {
  margin: 0 0 0.45rem;
}

.cmd-output p:last-child {
  margin-bottom: 0;
}

.services-list {
  list-style-type: "- ";
  padding-left: 3.5ch;
}

.services-list li {
  margin: 0.2rem 0;
}

.services-list li::marker {
  color: var(--fg-dim);
}

/* Contact definition list */
.contact-address {
  font-style: normal;
}

.contact-list {
  margin: 0;
}

.contact-row {
  display: grid;
  grid-template-columns: 8ch 1fr;
  align-items: baseline;
  gap: 0.15rem 1ch;
  margin: 0.2rem 0;
}

.contact-row dt {
  color: var(--fg-dim);
}

.contact-row dd {
  margin: 0;
  min-width: 0;
}

/* Links and command buttons: inverse video on hover and focus */
a {
  color: var(--fg-bright);
  text-decoration: underline;
  text-decoration-color: var(--fg-dim);
  text-underline-offset: 0.2em;
  padding: 0 0.2ch;
}

.lang-nav a,
.status-lang a {
  text-decoration: none;
  padding: 0 0.35ch;
}

a.prompt-cmd {
  padding: 0;
}

a:hover,
a:focus-visible {
  background-color: var(--fg-bright);
  color: var(--screen);
  text-decoration: underline;
  text-decoration-color: var(--screen);
  text-shadow: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--fg-bright);
  outline-offset: 2px;
}

.invaders-launch {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.25ch;
  margin: 0;
}

.cmd-button {
  font-family: var(--font-mono);
  font-size: 1em;
  font-weight: 600;
  line-height: 1.4;
  padding: 0.1rem 0.5ch;
  color: var(--fg-bright);
  background-color: transparent;
  border: 1px solid var(--fg-dim);
  cursor: pointer;
  text-shadow: 0 0 4px var(--glow);
}

.cmd-button:not(:disabled):hover,
.cmd-button:not(:disabled):focus-visible {
  background-color: var(--fg-bright);
  color: var(--screen);
  border-color: var(--fg-bright);
  text-decoration: underline;
  text-shadow: none;
}

.cmd-button:disabled {
  color: var(--fg-dim);
  border-color: var(--rule);
  cursor: not-allowed;
  opacity: 1;
}

.invaders-help,
.noscript-note {
  color: var(--fg-dim);
  font-size: 0.92em;
}

.noscript-note {
  margin: 0.35rem 0 0;
}

.invaders-container {
  margin-top: 0.65rem;
}

.invaders-motion-note {
  margin: 0 0 0.45rem;
  color: var(--fg-dim);
  font-size: 0.9em;
}

.invaders-canvas {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  aspect-ratio: 4 / 3;
  background-color: var(--screen);
  border: 1px solid var(--rule);
  box-shadow: inset 0 0 18px rgb(255 176 0 / 0.05);
}

.invaders-canvas:focus {
  outline: 1px solid var(--fg-dim);
  outline-offset: 2px;
}

.invaders-canvas:focus-visible {
  outline: 2px solid var(--fg-bright);
  outline-offset: 2px;
}

.invaders-controls {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  max-width: 640px;
  margin-top: 0.5rem;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

@media (pointer: coarse) {
  .invaders-controls {
    display: flex;
  }
}

.invaders-touch-btn {
  flex: 1 1 0;
  min-height: 44px;
  min-width: 48px;
  padding: 0.4rem 0.75rem;
  font-size: 1rem;
  text-align: center;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.invaders-touch-fire {
  flex: 1.4 1 0;
}

.invaders-touch-btn[data-pressed="true"],
.invaders-touch-btn:active {
  background-color: var(--fg-bright);
  color: var(--screen);
  border-color: var(--fg-bright);
  text-shadow: none;
}

.invaders-description,
.invaders-status,
.invaders-live {
  background-color: var(--screen);
  color: var(--fg);
}

.invaders-end {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  max-width: 640px;
  margin-top: 0.5rem;
  padding: 0.55rem 0.75rem;
  background-color: var(--bg);
  border: 1px solid var(--rule);
}

.invaders-end[hidden] {
  display: none;
}

.invaders-end-message {
  margin: 0;
  color: var(--fg-bright);
  font-weight: 600;
}

.invaders-cta {
  margin: 0;
  color: var(--fg);
}

/* Blinking block cursor at 1 Hz */
@keyframes cursor-blink {
  0%,
  49.9% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.prompt-cursor {
  margin-top: 1.1rem;
  margin-bottom: 0;
}

.cursor {
  display: inline-block;
  color: var(--fg-bright);
  animation: cursor-blink 1s steps(1, end) infinite;
}

/* Status-bar footer anchored to the bottom of the terminal window */
.status-bar {
  margin-top: auto;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg);
  border-top: 1px solid var(--rule);
  font-size: 0.85em;
}

.status-bar-main {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1rem;
}

.legal-line {
  flex: 1 1 20rem;
  margin: 0;
  color: var(--fg);
}

.privacy-line {
  margin: 0.25rem 0 0;
  color: var(--fg-dim);
}

/* Tablet and desktop breakpoints */
@media (min-width: 30rem) {
  body {
    padding: 1.25rem 1rem;
  }

  .terminal {
    min-height: auto;
  }

  .title-bar {
    padding: 0.5rem 1.5rem;
  }

  .ascii-banner {
    display: block;
    padding: 0 1.5rem;
  }

  .banner-fallback {
    display: none;
  }

  .terminal-body {
    padding: 0.75rem 1.5rem 1.5rem;
  }

  .boot-overlay {
    padding: 1.25rem 1.5rem;
  }

  .cmd-output {
    padding-left: 2ch;
  }

  .services-list {
    padding-left: 4ch;
  }

  .status-bar {
    padding: 0.75rem 1.5rem;
  }
}

@media (min-width: 48rem) {
  body {
    padding: 2.5rem 1.5rem;
  }
}

/* Reduced motion: solid cursor, no animations or smooth scroll */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .cursor {
    animation: none;
    opacity: 1;
  }

  .boot-overlay {
    display: none;
    animation: none;
  }
}