/* ── Design tokens ── */
:root {
  --color-bg-content: #0a0a0a;
  --color-bg-sidebar: #141414;
  --pattern-overlay-sidebar: 0.97;
  --pattern-overlay-content: 0.997;
  --color-text: #c8c8c8;
  --color-text-muted: #9a9a9a;
  --color-heading: #f0f0f0;
  --color-border: #2a2a2a;
  --color-border-light: #3a3a3a;
  --color-nav-inactive: #303030;
  --color-nav-inactive-hover: #3a3a3a;
  --color-nav-active: #3d9a2e;
  --color-nav-active-hover: #48b838;
  --color-nav-active-border: #2d7a22;
  --color-shadow: #000;
  --font-heading: "Press Start 2P", "Courier New", monospace;
  --font-body: "Space Grotesk", "Segoe UI", sans-serif;
  --sidebar-width: 260px;
  --panel-width: 72vw;
  --panel-height: 70vh;
  --pixel-shadow: 4px 4px 0 var(--color-shadow);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-body);
  color: var(--color-text);
  background: #1a1208;
}

/* ── Full-screen fixed background ── */
.background {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(
      180deg,
      rgba(20, 10, 5, 0.15) 0%,
      rgba(10, 8, 6, 0.35) 100%
    ),
    url("../images/background-2.webp") center / cover no-repeat fixed;
  image-rendering: auto;
}

.background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-conic-gradient(
      from 45deg,
      rgba(0, 0, 0, 0.02) 0% 25%,
      transparent 0% 50%
    )
    0 0 / 4px 4px;
  pointer-events: none;
  opacity: 0.4;
}

/* ── Page layout ── */
.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

/* ── Stacked pixel-card shadows ── */
.panel-stack {
  position: relative;
  width: var(--panel-width);
  max-width: 1100px;
  height: var(--panel-height);
  max-height: 780px;
}

.panel-shadow {
  position: absolute;
  inset: 0;
  background: var(--color-shadow);
  border: 2px solid #111;
}

.panel-shadow--back {
  transform: translate(8px, 8px);
  z-index: 0;
}

.panel-shadow--mid {
  transform: translate(4px, 4px);
  z-index: 1;
  background: #0d0d0d;
}

.panel {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  width: 100%;
  height: 100%;
  border: 2px solid #222;
  background: var(--color-bg-content);
  box-shadow: var(--pixel-shadow);
}

/* ── Sidebar ── */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.5rem 1rem;
  background-color: var(--color-bg-sidebar);
  background-image:
    linear-gradient(
      rgba(20, 20, 20, var(--pattern-overlay-sidebar)),
      rgba(20, 20, 20, var(--pattern-overlay-sidebar))
    ),
    url("../images/pattern-2.png");
  background-size: auto, 96px 96px;
  border-right: 2px solid var(--color-border);
}

.logo-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  cursor: pointer;
}

.logo-card:hover .logo-card__img {
  opacity: 0.9;
}

.logo-card:active .logo-card__img {
  transform: scale(0.98);
}

.logo-card:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 4px;
}

.logo-card__img {
  display: block;
  width: 100%;
  max-width: 120px;
  height: auto;
  image-rendering: pixelated;
  transition: opacity 0.15s ease, transform 0.1s ease;
}

.sidebar__header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nav-toggle {
  display: none;
}

.nav-overlay {
  display: none;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.nav-item {
  width: 100%;
  color: #303030;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.85rem 0.75rem;
  border: 2px solid #333;
  border-bottom-color: #222;
  border-top-color: #444;
  background: var(--color-nav-inactive);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.55rem;
  line-height: 1.4;
  letter-spacing: 0.02em;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 3px 0 #1a1a1a, 2px 2px 0 #000;
  transition:
    background 0.15s ease,
    transform 0.1s ease,
    box-shadow 0.1s ease;
}

.nav-btn__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  image-rendering: pixelated;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

.nav-btn__label {
  flex: 1;
}

.nav-btn:hover {
  background: var(--color-nav-inactive-hover);
}

.nav-btn:active,
.nav-btn.nav-btn--active:active {
  transform: translate(1px, 2px);
  box-shadow: 0 1px 0 #1a1a1a, 1px 1px 0 #000;
}

.nav-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.nav-btn--active {
  background: var(--color-nav-active);
  border-color: var(--color-nav-active-border);
  border-top-color: #5cc44a;
  border-bottom-color: #2a6a20;
  box-shadow: 0 3px 0 #1e5018, 2px 2px 0 #000;
}

.nav-btn--active:hover {
  background: var(--color-nav-active-hover);
}

.nav-btn--active .nav-btn__icon {
  opacity: 1;
}

/* ── Content area ── */
.content-shell {
  min-width: 0;
  background-color: var(--color-bg-content);
  background-image:
    linear-gradient(
      rgba(10, 10, 10, var(--pattern-overlay-content)),
      rgba(10, 10, 10, var(--pattern-overlay-content))
    ),
    url("../images/pattern-3.png");
  background-size: auto, 128px 128px;
  overflow: hidden;
}

.content-area {
  height: 100%;
  overflow-y: auto;
  padding: 1rem 2.25rem;
  scrollbar-width: thin;
  scrollbar-color: #333 #0a0a0a;
}

.content-area::-webkit-scrollbar {
  width: 8px;
}

.content-area::-webkit-scrollbar-track {
  background: #0a0a0a;
}

.content-area::-webkit-scrollbar-thumb {
  background: #333;
  border: 1px solid #222;
}

.content-area--hidden {
  opacity: 0;
  transform: translateY(6px);
}

.content-area--visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.content-block {
  padding-bottom: 0px;
}

.content-block + .content-block {
  margin-top: 3rem;
}

.content-block__heading-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0;
  padding-bottom: 16px;
}

.content-block__heading {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-heading);
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.content-block__divider {
  flex: 1;
  height: 2px;
  background: var(--color-border);
  min-width: 2rem;
}

.content-block__text {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: #e0e0e0;
  margin-bottom: 0.85rem;
}

div.content-block__text {
  padding-top: 16px;
  margin-top: 0;
}

.content-block__text:last-child {
  margin-bottom: 0;
}

.content-block__quote {
  margin: 0;
  padding: 2px;
  background: conic-gradient(
    from 0deg,
    #e74c3c 0deg,
    #f39c12 50deg,
    #f1c40f 100deg,
    #2ecc71 160deg,
    #1abc9c 210deg,
    #3498db 260deg,
    #9b59b6 310deg,
    #e74c3c 360deg
  );
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.content-block__quote-inner {
  background: #0a0a0a;
  padding: 1.35rem 1.5rem;
}

.content-block__quote-text {
  margin-bottom: 0;
}

.content-block__date {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--color-text-muted);
  white-space: nowrap;
  vertical-align: baseline;
}

.content-block__post {
  font-size: 16px;
  line-height: 1.7;
}

.content-block__post-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.content-block__post .content-block__date {
  font-size: 0.85rem;
}

.content-block__post-paragraph {
  margin: 0 0 0.85rem;
}

.content-block__post-paragraph:last-of-type {
  margin-bottom: 0.85rem;
}

.content-block__post:has(.content-block__post-paragraph) .content-block__date {
  display: block;
  margin-left: 0;
  margin-top: 0.25rem;
}

.content-block__post:not(:last-child) {
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid #2a2a2a;
}

/* ── Tablet ── */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 220px;
    --panel-width: 90vw;
    --panel-height: 72vh;
  }

  .content-area {
    padding: 1rem 1.5rem;
  }

  .content-block__heading {
    font-size: 0.6rem;
  }

  .content-block__text {
    font-size: 16px;
  }

  .content-block__post {
    font-size: 16px;
  }

  .nav-btn {
    font-size: 0.5rem;
    padding: 0.75rem 0.65rem;
  }
}

/* ── Mobile ── */
@media (max-width: 720px) {
  :root {
    --panel-width: 93vw;
    --mobile-page-margin: 1.25rem;
  }

  body.menu-open {
    overflow: hidden;
  }

  .page {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    padding: 1rem 0.75rem var(--mobile-page-margin);
    align-items: center;
    box-sizing: border-box;
  }

  .panel-stack {
    display: flex;
    flex-direction: column;
    flex: 1;
    width: var(--panel-width);
    height: calc(100dvh - 1rem - var(--mobile-page-margin));
    max-height: none;
    margin: 0;
  }

  .panel-shadow--back {
    transform: translate(5px, 5px);
  }

  .panel-shadow--mid {
    transform: translate(2px, 2px);
  }

  .panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    height: 100%;
  }

  .nav-overlay {
    display: block;
    position: fixed;
    top: var(--mobile-topbar-bottom, 72px);
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 90;
    background: rgba(0, 0, 0, 0.82);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity 0.25s ease,
      visibility 0.25s ease;
  }

  .panel--menu-open .nav-overlay {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .sidebar {
    position: relative;
    z-index: 102;
    flex-shrink: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    border-right: none;
    border-bottom: 2px solid var(--color-border);
    gap: 0;
  }

  .sidebar__header {
    position: relative;
    z-index: 103;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 0.75rem;
  }

  .logo-card {
    max-width: none;
    padding: 0;
    justify-content: flex-start;
  }

  .logo-card__img {
    max-width: 64px;
  }

  .nav-toggle {
    position: relative;
    z-index: 104;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 2px solid #333;
    border-bottom-color: #222;
    border-top-color: #444;
    background: var(--color-nav-inactive);
    cursor: pointer;
    box-shadow: 0 3px 0 #1a1a1a, 2px 2px 0 #000;
    transition:
      background 0.15s ease,
      box-shadow 0.1s ease;
  }

  .nav-toggle:hover {
    background: var(--color-nav-inactive-hover);
  }

  .nav-toggle:active:not(.nav-toggle--open) {
    transform: translate(1px, 2px);
    box-shadow: 0 1px 0 #1a1a1a, 1px 1px 0 #000;
  }

  .nav-toggle:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 2px;
  }

  .nav-toggle__bar {
    position: absolute;
    left: 50%;
    top: 50%;
    display: block;
    width: 20px;
    height: 3px;
    margin-left: -10px;
    margin-top: -1.5px;
    background: #fff;
    transform-origin: center;
    transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease;
  }

  .nav-toggle__bar:nth-child(1) {
    top: calc(50% - 8px);
  }

  .nav-toggle__bar:nth-child(2) {
    top: 50%;
  }

  .nav-toggle__bar:nth-child(3) {
    top: calc(50% + 8px);
  }

  .nav-toggle--open .nav-toggle__bar:nth-child(1) {
    top: 50%;
    transform: rotate(45deg);
  }

  .nav-toggle--open .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle--open .nav-toggle__bar:nth-child(3) {
    top: 50%;
    transform: rotate(-45deg);
  }

  .sidebar nav {
    position: fixed;
    top: var(--mobile-topbar-bottom, 72px);
    left: 0.75rem;
    right: 0.75rem;
    z-index: 100;
    padding: 0.75rem 0 1.5rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition:
      opacity 0.25s ease,
      visibility 0.25s ease,
      transform 0.25s ease;
  }

  .panel--menu-open .sidebar nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    width: 100%;
    margin: 0;
    padding: 1rem;
    background-color: var(--color-bg-sidebar);
    background-image:
      linear-gradient(
        rgba(20, 20, 20, var(--pattern-overlay-sidebar)),
        rgba(20, 20, 20, var(--pattern-overlay-sidebar))
      ),
      url("../images/pattern-2.png");
    background-size: auto, 96px 96px;
    border: 2px solid var(--color-border);
    box-shadow: 4px 4px 0 #000;
  }

  .nav-btn {
    justify-content: flex-start;
    font-size: 0.58rem;
    padding: 0.85rem 0.75rem;
    gap: 0.6rem;
  }

  .nav-btn__icon {
    width: 18px;
    height: 18px;
  }

  .content-shell {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
  }

  .content-area {
    flex: 1;
    height: 100%;
    max-height: none;
    padding: 1.25rem 1rem;
    overflow-y: auto;
  }

  .content-block__heading {
    font-size: 0.55rem;
  }

  .content-block__text {
    font-size: 16px;
    line-height: 1.6;
  }

  .content-block__post {
    font-size: 16px;
  }
}