/* === Panel-Line Design System === */
/* Gundam-inspired structural accents: subtle borders, corner greebles, geometric details */

/* --- Navigation --- */
.nav {
  height: var(--nav-height);
  border-bottom: 1px solid var(--line-primary);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg-primary);
  z-index: 100;
  width: 100%;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.4em;
}

.nav__logo-icon {
  width: 1.4em;
  height: 1.4em;
}

.nav__logo:hover {
  color: var(--accent-red);
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  align-items: center;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  position: relative;
}

.nav__link:hover,
.nav__link--active {
  color: var(--accent-red);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-red);
}

.nav__separator {
  width: 1px;
  height: 16px;
  background: var(--line-primary);
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--line-primary);
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: border-color 0.15s, color 0.15s;
}

.theme-toggle:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

/* Mobile nav */
.nav__menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-xs);
  transition: color 0.15s ease;
}

.nav__menu-btn:hover {
  color: var(--accent-red);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--line-primary);
    flex-direction: column;
    padding: var(--space-md) var(--space-lg);
    gap: var(--space-md);
  }

  .nav__links--open {
    display: flex;
  }

  .nav__separator {
    display: none;
  }

  .nav__menu-btn {
    display: block;
  }
}

/* --- Panel Card --- */
.panel {
  background: var(--bg-primary);
  border: 1px solid var(--line-primary);
  padding: var(--space-lg);
  position: relative;
  transition: border-color 0.15s ease;
}

.panel:hover {
  border-color: var(--line-accent);
}

/* Corner greeble accents */
.panel--greeble::before,
.panel--greeble::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-color: var(--line-primary);
  border-style: solid;
  transition: border-color 0.15s ease;
}

.panel--greeble::before {
  top: 3px;
  left: 3px;
  border-width: 1px 0 0 1px;
}

.panel--greeble::after {
  bottom: 3px;
  right: 3px;
  border-width: 0 1px 1px 0;
}

.panel--greeble:hover::before,
.panel--greeble:hover::after {
  border-color: var(--accent-red);
}

/* --- Section Header --- */
.section-header {
  display: inline-block;
  margin-bottom: var(--space-2xl);
}

.section-header__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.section-header__title {
  font-family: var(--font-heading);
  margin-bottom: var(--space-sm);
}

.section-header__line {
  width: calc(100% + 24px);
  height: 1px;
  background: var(--accent-red);
  position: relative;
}

.section-header__line::after {
  content: '';
  position: absolute;
  right: -8px;
  top: -2px;
  width: 5px;
  height: 5px;
  border: 1px solid var(--accent-red);
  transform: rotate(45deg);
}

/* --- Divider --- */
.divider {
  border: none;
  height: 1px;
  background: var(--line-primary);
  margin: var(--space-2xl) 0;
  position: relative;
}

.divider::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -3px;
  width: 7px;
  height: 7px;
  background: var(--bg-primary);
  border: 1px solid var(--line-primary);
  transform: translateX(-50%) rotate(45deg);
}

/* --- Blog Post Card --- */
.post-card {
  display: block;
  padding: var(--space-lg);
  border: 1px solid var(--line-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.15s ease, background 0.15s ease;
  position: relative;
}

.post-card:hover {
  border-color: var(--accent-red);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.post-card__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.post-card__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.post-card__description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.post-card__tags {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

/* --- Tags --- */
.tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border: 1px solid var(--line-primary);
  color: var(--text-muted);
  background: transparent;
}

/* --- Project Card --- */
.project-card {
  border: 1px solid var(--line-primary);
  background: var(--bg-primary);
  padding: var(--space-lg);
  position: relative;
  transition: border-color 0.15s ease;
}

.project-card:hover {
  border-color: var(--accent-red);
}

.project-card__status {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.project-card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.project-card__description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

.project-card__tech {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.project-card__links {
  display: flex;
  gap: var(--space-md);
}

.project-card__link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Grid Layouts --- */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .grid--2col,
  .grid--3col {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid--3col {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--line-primary);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer__link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.footer__link:hover {
  color: var(--accent-red);
}

@media (max-width: 768px) {
  .footer__inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* --- Reading Progress Bar --- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--accent-red);
  z-index: 200;
  transition: width 0.1s linear;
}

/* --- Article Graph Container --- */
.graph-container {
  border: 1px solid var(--line-primary);
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
  min-height: 400px;
}

.graph-container__label {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  z-index: 10;
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-3xl) 0;
  position: relative;
}

.hero__title {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
}

@media (max-width: 768px) {
  .hero__title {
    font-size: 1.75rem;
  }

  .hero {
    padding: var(--space-2xl) 0;
  }
}

/* --- Project Detail --- */
.project-detail__hero {
  margin: var(--space-xl) 0;
  border: 1px solid var(--line-primary);
}

.project-detail__hero img {
  display: block;
  width: 100%;
  height: auto;
}

.project-card__meta {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* --- Post Project Banner --- */
.post-project-banner {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-decoration: none;
  padding: 3px 6px;
  border: 1px solid var(--line-primary);
  margin-left: var(--space-md);
  transition: all 0.15s;
  white-space: nowrap;
}

.post-project-banner:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

/* --- Page Header --- */
.page-header {
  max-width: var(--max-width-prose);
  margin-left: auto;
  margin-right: auto;
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--line-primary);
  margin-bottom: var(--space-2xl);
}

.page-header--full-width {
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

.page-header__title-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.page-header__title-row h1 {
  margin: 0;
}

/* --- Compact Related Posts --- */
.related-posts--compact {
  max-width: var(--max-width-prose);
  margin: var(--space-xl) auto;
}

.related-posts--compact__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  display: block;
}

.related-posts--compact__scroll {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding-bottom: var(--space-sm);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.related-posts--compact__scroll::-webkit-scrollbar {
  height: 4px;
}

.related-posts--compact__scroll::-webkit-scrollbar-track {
  background: transparent;
}

.related-posts--compact__scroll::-webkit-scrollbar-thumb {
  background: var(--line-primary);
  border-radius: 2px;
}

.related-posts--compact__scroll::-webkit-scrollbar-thumb:hover {
  background: var(--accent-red);
}

.post-card--mini {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-sm);
  border: 1px solid var(--line-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease;
  position: relative;
  flex-shrink: 0;
  width: clamp(140px, 20vw, 200px);
}

.post-card--mini:hover {
  border-color: var(--accent-red);
  background: var(--bg-secondary);
}

.post-card--mini__title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  line-height: 1.3;
  word-break: break-word;
}

.post-card--mini__meta {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* --- Resume Download --- */
.resume-download {
  margin-bottom: var(--space-xl);
}

.resume-download__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--line-primary);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
}

.resume-download__btn:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.resume-download__icon {
  font-size: 0.6rem;
}

/* --- Filter Bar --- */
.filter-bar {
  margin-bottom: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.filter-bar__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--line-primary);
  outline: none;
  transition: border-color 0.15s ease;
}

.filter-bar__input::placeholder {
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.filter-bar__input:focus {
  border-color: var(--accent-red);
}

.filter-bar__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag--filter {
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.tag--filter:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.tag--filter.active {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: var(--bg-primary);
}

.filter-bar__empty {
  display: none;
  padding: var(--space-2xl);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  border: 1px solid var(--line-primary);
  grid-column: 1 / -1;
}

/* --- About Page --- */

/* About intro: photo + header + contact section */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin: 0 auto var(--space-xl);
  margin-bottom: var(--space-xl);
  align-items: start;
  max-width: var(--max-width-prose);
  padding-top: var(--space-2xl);
}

.about-intro__photo-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-intro__photo {
  width: clamp(200px, 35vw, 400px);
  height: clamp(200px, 35vw, 400px);
  border-radius: var(--border-radius);
  border: 1px solid var(--line-primary);
  object-fit: cover;
  display: block;
}

.about-intro__right {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-intro__header h1 {
  margin: 0;
}

.about-intro__description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: var(--space-sm) 0 0 0;
}

.contact-panel {
  border: 1px solid var(--line-primary);
  padding: var(--space-lg);
  position: relative;
  margin-bottom: var(--space-xl);
  transition: border-color 0.15s ease;
}

.contact-panel:hover {
  border-color: var(--line-accent);
}

.contact-panel--greeble::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 8px;
  height: 8px;
  border-width: 1px 0 0 1px;
  border-style: solid;
  border-color: var(--line-primary);
}

.contact-panel--greeble::after {
  content: '';
  position: absolute;
  bottom: 3px;
  right: 3px;
  width: 8px;
  height: 8px;
  border-width: 0 1px 1px 0;
  border-style: solid;
  border-color: var(--line-primary);
}

.contact-panel--greeble:hover::before,
.contact-panel--greeble:hover::after {
  border-color: var(--accent-red);
}

.contact-panel__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  display: block;
  margin-bottom: var(--space-md);
}

.contact-panel__items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.contact-panel__item {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--line-primary);
  display: inline-block;
  text-decoration: none;
  transition: all 0.15s ease;
}

.contact-panel__item:hover {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.contact-panel__item--resume {
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.contact-panel__item--resume:hover {
  background: var(--accent-red);
  color: var(--bg-primary);
}

@media (max-width: 768px) {
  .about-intro {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .about-intro__right {
    gap: var(--space-md);
  }

  .about-intro__photo {
    width: clamp(150px, 70vw, 300px);
    height: clamp(150px, 70vw, 300px);
  }
}