/* ==========================================================================
   GP.OS core styles — design tokens, reset, toasts, shared helpers.
   Every other stylesheet builds on these variables.
   ========================================================================== */
:root {
  color-scheme: dark;

  /* surfaces */
  --bg: #04050d;
  --bg-2: #080b1a;
  --bg-3: #0e1430;
  --panel: rgba(12, 18, 42, 0.55);
  --panel-strong: rgba(8, 12, 30, 0.88);
  --border: rgba(130, 220, 255, 0.16);
  --border-strong: rgba(130, 220, 255, 0.38);

  /* text */
  --text: #e8f3ff;
  --text-dim: #a3b5d4;
  --text-faint: #61739a;

  /* neon palette */
  --cyan: #00f0ff;
  --magenta: #ff2bd6;
  --lime: #39ff14;
  --yellow: #ffe600;
  --orange: #ff8a00;
  --red: #ff3860;
  --violet: #a26bff;
  --gold: #ffc23d;

  /* theme accents — GP.theme.set() rewrites these four */
  --accent: #00f0ff;
  --accent-2: #ff2bd6;
  --accent-rgb: 0, 240, 255;
  --accent-2-rgb: 255, 43, 214;

  /* type */
  --font-display: 'Orbitron', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', Consolas, monospace;

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-back: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* shape */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --glow: 0 0 12px rgba(var(--accent-rgb), 0.55), 0 0 42px rgba(var(--accent-rgb), 0.22);
  --glow-2: 0 0 12px rgba(var(--accent-2-rgb), 0.55), 0 0 42px rgba(var(--accent-2-rgb), 0.22);

  /* layout */
  --nav-h: 72px;
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1240px;

  /* stacking order (low → high) */
  --z-bg: 0;
  --z-content: 1;
  --z-nav: 100;
  --z-hud: 120;
  --z-transition: 500;
  --z-modal: 600;
  --z-arcade: 800;
  --z-terminal: 900;
  --z-toast: 950;
  --z-fx-top: 960;
  --z-boot: 1000;
  --z-cursor: 2000;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg,
canvas,
video {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(var(--accent-rgb), 0.35);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

/* "✎ fill me in" content from js/content.js — visible, but clearly a placeholder */
.is-placeholder {
  font-style: italic;
  opacity: 0.72;
  text-decoration: underline dashed rgba(var(--accent-rgb), 0.45);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

/* ----------------------------------------------------------------- photos */
/* GP.util.photo(): callers size .gp-photo; the image (or the empty slot) fills it. */
.gp-photo {
  position: relative;
  overflow: hidden;
  background: var(--bg-3);
  container-type: inline-size;
}
.gp-photo > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--photo-pos, 50% 25%);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.gp-photo.is-loaded > img {
  opacity: 1;
}
.gp-photo.is-empty {
  background:
    repeating-linear-gradient(135deg, rgba(var(--accent-rgb), 0.07) 0 2px, transparent 2px 12px),
    radial-gradient(120% 90% at 50% 20%, rgba(var(--accent-rgb), 0.18), transparent 70%),
    var(--bg-3);
}
.gp-photo__slot {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.6em;
  padding: 12px;
  text-align: center;
}
.gp-photo__mono {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  font-size: clamp(22px, 26cqi, 120px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(var(--accent-rgb), 0.8);
  text-shadow: 0 0 24px rgba(var(--accent-rgb), 0.35);
}
.gp-photo__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--text-dim);
}

/* ----------------------------------------------------------------- toasts */
.gp-toasts {
  position: fixed;
  top: calc(var(--nav-h) + 12px);
  right: 16px;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(360px, calc(100vw - 32px));
  pointer-events: none;
}

.gp-toast {
  --toast-color: var(--accent);
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px 16px 14px 12px;
  border: 1px solid color-mix(in srgb, var(--toast-color) 45%, transparent);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(10, 16, 38, 0.92), rgba(6, 9, 22, 0.92));
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 0 0 24px color-mix(in srgb, var(--toast-color) 25%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  pointer-events: auto;
  cursor: pointer;
  transform: translateX(calc(100% + 24px)) skewX(-8deg);
  opacity: 0;
  transition: transform 0.55s var(--ease-out), opacity 0.4s ease;
}

.gp-toast.is-in {
  transform: none;
  opacity: 1;
}

.gp-toast.is-out {
  transform: translateX(calc(100% + 24px));
  opacity: 0;
  transition-duration: 0.4s;
}

.gp-toast__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 20px;
  color: var(--toast-color);
  background: color-mix(in srgb, var(--toast-color) 14%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--toast-color) 40%, transparent);
}

.gp-toast__kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--toast-color);
  background: linear-gradient(90deg, var(--gold), var(--magenta), var(--cyan), var(--gold));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gp-shimmer 2.4s linear infinite;
}

.gp-toast__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.gp-toast__sub {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
}

.gp-toast__bar {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--toast-color);
  box-shadow: 0 0 10px var(--toast-color);
  transform-origin: left;
  animation: gp-toast-life var(--toast-life, 3800ms) linear forwards;
}

.gp-toast--secret {
  --toast-color: var(--gold);
}
.gp-toast--success {
  --toast-color: var(--lime);
}
.gp-toast--game {
  --toast-color: var(--magenta);
}
.gp-toast--warn {
  --toast-color: var(--red);
}

@keyframes gp-toast-life {
  to {
    transform: scaleX(0);
  }
}

@keyframes gp-shimmer {
  to {
    background-position: 300% 0;
  }
}

@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;
  }
}