/* ==========================================================================
   Reset & Custom Properties
   Loaded on every page. Light/dark theme colors live in --bg/--fg, flipped
   by body.dark (toggled in js/script.js).
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
}

:root {
  --white: #ffffff;
  --black: #000000;
  --bg: var(--white);
  --fg: var(--black);
  --darkmode-blue: #377dff;
  --primary-red: #ff6b6b;
  --primary-blue: #00f;
  --primary-grey: #262626;
  --secondary-grey: #666666;
  --tertiary-grey: #8f8f8f;
}

/* ==========================================================================
   Global Elements
   ========================================================================== */
body {
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  font-family: sans-serif;
  overflow: hidden;
  margin: 0 1rem;
}

a {
  color: var(--fg);
  text-decoration: none;
}

/* ==========================================================================
   Header / Site Nav
   ========================================================================== */
header {
  position: fixed;
  top: 0;
  left: 1rem;
  display: flex;
  justify-content: space-between;
  z-index: 10;
  margin-top: 1rem;
  font-size: 1rem;
  flex-direction: column;
  width: fit-content;
  white-space: nowrap;
}

header p {
  margin-bottom: 1rem;
  cursor: default;
  font-weight: 600;
}

header p a {
  text-decoration: none;
}

header a:hover {
  color: var(--primary-blue);
}

.nav-menu {
  display: flex;
  font-size: 1rem;
  flex-direction: column;
  gap: 0.4rem;
}

.nav-menu li {
  text-decoration: none;
  list-style: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: 10;
  font-size: 0.9rem;
  color: var(--primary-grey);
  cursor: default;
}

footer a {
  text-decoration: none;
}

footer a:hover {
  color: var(--secondary-grey);
}

footer p {
  margin-bottom: 0.2rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
}

.footer-content .message {
  width: 25%;
}

.footer-content .right-mark {
  width: 25%;
  text-align: right;
}

/* ==========================================================================
   Theme Toggle Button
   ========================================================================== */
.theme-btn {
  position: fixed;
  right: max(1rem, 1vw);
  top: 48%;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

@media (max-width: 768px) {
  .theme-btn {
    top: 1rem;
    transform: none;
  }

  .footer-content .message {
    display: none;
  }

  .footer-content {
    justify-content: center;
  }

  .footer-content .right-mark {
    width: 100%;
    text-align: center;
  }

  .footer-content .right-mark p {
    white-space: nowrap;
  }
}

.theme-btn img {
  display: block;
  width: 20px;
  height: auto;
  transition: transform 0.15s ease;
}

.theme-btn:hover img {
  transform: scaleX(-1);
}

/* ==========================================================================
   Glyph Editor (index.html hero — interactive point editor, js/script.js)
   ========================================================================== */
.editor-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

svg#canvas {
  background: var(--bg);
  cursor: crosshair;
  touch-action: none;
}

.glyph-fill {
  fill: var(--fg);
  fill-rule: evenodd;
}

.handle-line {
  stroke: var(--tertiary-grey);
  stroke-width: 1;
  pointer-events: none;
  opacity: 0.6;
}

/* on-curve point (square) */
.point-oncurve {
  fill: var(--tertiary-grey);
  stroke: var(--secondary-grey);
  stroke-width: 1.5;
  cursor: move;
}

.point-oncurve:hover {
  fill: var(--secondary-grey);
  stroke: var(--tertiary-grey);
}

/* off-curve point (circle) */
.point-offcurve {
  fill: transparent;
  stroke: var(--tertiary-grey);
  stroke-width: 1.5;
  cursor: move;
}

.point-offcurve:hover {
  fill: var(--tertiary-grey);
  stroke: var(--secondary-grey);
}

.point-selected {
  fill: var(--primary-red) !important;
  stroke: var(--fg) !important;
}

/* ==========================================================================
   Dark Mode Overrides
   ========================================================================== */
body.dark {
  --bg: var(--black);
  --fg: var(--white);
  --primary-blue: var(--darkmode-blue);
}

body.dark .handle-line {
  stroke: var(--secondary-grey);
}

body.dark .point-oncurve {
  fill: var(--secondary-grey);
  stroke: var(--tertiary-grey);
}

body.dark .point-oncurve:hover {
  fill: var(--tertiary-grey);
  stroke: var(--secondary-grey);
}

body.dark .point-offcurve {
  stroke: var(--secondary-grey);
}

body.dark .point-offcurve:hover {
  fill: var(--secondary-grey);
}

body.dark p,
body.dark a {
  color: var(--tertiary-grey);
}
body.dark a:hover {
  color: var(--fg);
}

/* Higher specificity than body.dark a:hover above, so the header nav's
   blue hover isn't swallowed by the generic dark-mode hover color. */
body.dark header a:hover {
  color: var(--primary-blue);
}

/* ==========================================================================
   Access Gate (js/access-gate.js) — pre-launch password prompt for pages
   not ready for public viewing. See the comment at the top of that file for
   what this can and can't actually protect.
   ========================================================================== */
.access-gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.access-gate-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.access-gate-form input {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--fg);
  background: var(--bg);
  color: var(--fg);
  text-align: center;
}

.access-gate-form button {
  cursor: pointer;
}

.access-gate-error {
  color: var(--primary-red);
}