/*
 * Tension v1 — Base layer (architectural wireframe)
 * Sharp corners (0 radius), hairline dividers (#E4E4E7), zero shadows.
 */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  padding-top: 4rem;
  font-family: var(--lc-font-body);
  font-size: var(--lc-text-body-md);
  line-height: 1.6;
  color: var(--lc-on-surface);
  background-color: var(--lc-background);
  overflow-x: hidden;
}

/* Cross-document View Transitions (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.2s;
  animation-timing-function: ease-out;
}

/* Keyboard-focus fallback */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--lc-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
}

:where(
  input:not([type="button"]):not([type="submit"]):not([type="reset"]):not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]),
  textarea
) {
  cursor: text;
}

:is(
  a[href],
  button:not(:disabled),
  summary,
  label[for],
  select,
  [role="button"]:not([aria-disabled="true"]),
  [role="link"],
  [role="tab"],
  input[type="submit"],
  input[type="button"],
  input[type="reset"],
  input[type="checkbox"],
  input[type="radio"]
) {
  cursor: pointer;
}

:is(button:disabled, [aria-disabled="true"]) {
  cursor: not-allowed;
}

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

a {
  text-decoration: none;
  /* color: inherit; */
  transition: color var(--lc-transition), border-color var(--lc-transition);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--lc-font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--lc-on-surface);
  letter-spacing: -0.02em;
}

/* Type utilities (legacy semantic classes kept for template compatibility) */
.lc-display-lg {
  font-family: var(--lc-font-heading);
  font-size: var(--lc-text-display-lg);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.lc-headline-lg {
  font-family: var(--lc-font-heading);
  font-size: var(--lc-text-headline-lg);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.lc-headline-md {
  font-family: var(--lc-font-heading);
  font-size: var(--lc-text-headline-md);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.lc-body-lg {
  font-size: var(--lc-text-body-lg);
  line-height: 1.65;
}

.lc-body-md {
  font-size: var(--lc-text-body-md);
  line-height: 1.6;
}

.lc-caption {
  font-family: var(--lc-font-caption);
  font-size: var(--lc-text-caption);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lc-label-md {
  font-family: var(--lc-font-ui);
  font-size: var(--lc-text-label-md);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.lc-muted {
  color: var(--lc-on-surface-variant);
}

.lc-container {
  width: 100%;
  max-width: var(--lc-container-max);
  margin-inline: auto;
  padding-inline: var(--lc-gutter-mobile);
}

@media (min-width: 768px) {
  .lc-container {
    padding-inline: var(--lc-gutter-desktop);
  }
}

/* Phone: drop the outer main gutter so hairline frames go edge-to-edge.
   Nav, page-header, footer, and reading layouts keep --lc-gutter-mobile. */
@media (max-width: 767px) {
  .lc-articles-archive > .mx-auto.max-w-container-max,
  .lc-projects-archive > .mx-auto.max-w-container-max,
  .lc-about-page > .mx-auto.max-w-container-max,
  .lc-404-page > .mx-auto.max-w-container-max,
  .lc-guestbook-page > .mx-auto.max-w-container-max,
  .lc-friend-links-page > .mx-auto.max-w-container-max,
  .lc-contact-page > .mx-auto,
  .lc-front-page > section > .mx-auto.max-w-container-max,
  .lc-project-single > .mx-auto.max-w-container-max,
  .lc-search-form-page {
    padding-inline: 0;
  }
}

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

.lc-skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.625rem 1rem;
  background: var(--lc-primary);
  color: var(--lc-on-primary);
  font-family: var(--lc-font-mono);
  font-size: 0.8125rem;
  border: 1px solid var(--lc-primary);
}

.lc-skip-link:focus {
  top: 0.5rem;
}

/* Material symbols icon */
.lc-material-icon {
  font-family: "Material Symbols Outlined";
  font-weight: normal;
  font-style: normal;
  font-size: 1.2rem;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  font-variation-settings: "FILL" 1, "wght" 400;
  min-width: 1em;
  min-height: 1em;
  opacity: 0;
  vertical-align: -0.18em;
}

html.lc-icons-ready .lc-material-icon,
html.no-js .lc-material-icon {
  opacity: 1;
  transition: opacity 0.12s ease;
}

.lc-default-content {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
}

/* Activated-link pending state during View Transitions navigation */
.lc-nav-pending {
  opacity: 0.5;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

body.lc-menu-open {
  overflow: hidden;
}

/* Toast — anchored bottom-left */
.lc-toast-region {
  position: fixed;
  left: 1.25rem;
  bottom: 1.25rem;
  z-index: 10001;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  pointer-events: none;
  max-width: min(20rem, calc(100vw - 2rem));
}

.lc-toast {
  padding: 0.625rem 1rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  color: var(--lc-on-surface);
  font-family: var(--lc-font-ui);
  font-size: var(--lc-text-body-sm);
  letter-spacing: 0;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.lc-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .lc-toast {
    transition: none;
    transform: none;
  }
}

/* Lazy image reveal — simple opacity fade (no blur, wireframe) */
@media (prefers-reduced-motion: no-preference) {
  img[loading="lazy"]:not(.lc-no-reveal):not(.lc-bento-card__bg-shot):not(.lc-article-card__cover-img):not(.lc-comment-tech__avatar):not(.lc-article__author-avatar) {
    opacity: 0;
    transition: opacity 0.3s var(--lc-ease-out);
  }

  img[loading="lazy"].is-loaded:not(.lc-no-reveal):not(.lc-bento-card__bg-shot):not(.lc-article-card__cover-img):not(.lc-comment-tech__avatar):not(.lc-article__author-avatar) {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  img[loading="lazy"]:not(.lc-no-reveal) {
    opacity: 1;
  }
}

/* Prose bare-link underline (from left) */
.lc-article__content a:not([class]) {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  text-decoration: none;
  transition: background-size 0.2s var(--lc-ease-out);
}

.lc-article__content a:not([class]):hover {
  background-size: 100% 1px;
}

/* Links wrapping media (images) shouldn't get the simulated underline */
.lc-article__content a:not([class]):has(> img),
.lc-article__content a:not([class]):has(img) {
  background-image: none;
}

/* Legacy cards: wireframe = hairline border, no radius, no shadow */
.lc-card {
  background: var(--lc-surface-container-lowest);
  border: 1px solid var(--lc-border-divider);
  transition: border-color 0.15s ease;
}

.lc-card--hover:hover {
  border-color: var(--lc-primary);
}

/* Legacy chip — sharp technical tag */
.lc-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-low);
  font-family: var(--lc-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}