:root {
  --paper-bg: #ede2cf;
  --paper-surface: #f8f1e4;
  --paper-panel: #f5ecdd;
  --paper-panel-strong: #fbf6ec;
  --paper-note: #d3dfef;
  --paper-note-ink: #304b73;
  --paper-line: #cdbda8;
  --paper-line-strong: #b79f84;
  --ink: #30271f;
  --muted-ink: #6c6155;
  --accent: #547aa8;
  --shadow-soft: 0 10px 22px rgba(99, 76, 49, 0.1), 0 2px 6px rgba(99, 76, 49, 0.06);
  --shadow-paper: 0 24px 32px rgba(99, 76, 49, 0.12), 0 5px 12px rgba(99, 76, 49, 0.08);
  --shadow-deep: 0 32px 46px rgba(77, 60, 39, 0.16), 0 8px 16px rgba(77, 60, 39, 0.1);
  --radius-panel: 26px;
  --radius-card: 14px;
  --sidebar-width: 220px;
  --content-width: 1120px;
  --font-heading: "Courier Prime", "Courier New", "Nimbus Mono PS", monospace;
  --font-body: "Georgia", "Times New Roman", serif;
  --motion-fast: 180ms;
  --motion-mid: 280ms;
  --motion-slow: 620ms;
}

html[data-theme="dark"] {
  --paper-bg: #121110;
  --paper-surface: #191715;
  --paper-panel: #23201d;
  --paper-panel-strong: #2c2824;
  --paper-note: #334866;
  --paper-note-ink: #edf2f9;
  --paper-line: #4f463d;
  --paper-line-strong: #6a5d51;
  --ink: #f3e8d7;
  --muted-ink: #ccbca6;
  --accent: #7598c8;
  --shadow-soft: 0 12px 24px rgba(0, 0, 0, 0.26), 0 3px 8px rgba(0, 0, 0, 0.16);
  --shadow-paper: 0 24px 34px rgba(0, 0, 0, 0.34), 0 6px 14px rgba(0, 0, 0, 0.2);
  --shadow-deep: 0 34px 52px rgba(0, 0, 0, 0.42), 0 8px 16px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.24), transparent 26%),
    radial-gradient(circle at 100% 20%, rgba(160, 135, 95, 0.1), transparent 26%),
    linear-gradient(180deg, rgba(137, 112, 79, 0.03), transparent 12%, transparent 88%, rgba(137, 112, 79, 0.04)),
    var(--paper-bg);
  transition: background-color var(--motion-mid) ease, color var(--motion-mid) ease;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  opacity: 0.34;
  background:
    radial-gradient(circle at 15% 22%, rgba(102, 83, 60, 0.05) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 76% 36%, rgba(102, 83, 60, 0.03) 0 1px, transparent 1px 100%),
    radial-gradient(circle at 43% 81%, rgba(102, 83, 60, 0.03) 0 1px, transparent 1px 100%);
  background-size: 13px 13px, 18px 18px, 22px 22px;
  mix-blend-mode: multiply;
}

body::after {
  opacity: 0.05;
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(0, 0, 0, 0.18) 12% 12.2%, transparent 12.2% 100%),
    linear-gradient(180deg, transparent 0 18%, rgba(0, 0, 0, 0.18) 18% 18.1%, transparent 18.1% 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  width: min(1440px, calc(100% - 2rem));
  margin: 1rem auto;
  position: relative;
}

.sidebar {
  position: fixed;
  top: 1.25rem;
  left: max(1rem, calc((100vw - 1440px) / 2 + 1rem));
  width: var(--sidebar-width);
  height: calc(100vh - 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.45rem;
  padding: 1.8rem 1.25rem 1.3rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03)),
    var(--paper-panel);
  border: 1px solid color-mix(in srgb, var(--paper-line) 76%, transparent);
  box-shadow: var(--shadow-paper);
  clip-path: polygon(1% 1%, 99% 0, 100% 6%, 99% 13%, 100% 25%, 99% 38%, 100% 56%, 98% 74%, 100% 93%, 97% 100%, 6% 99%, 0 96%, 1% 82%, 0 66%, 1% 49%, 0 31%, 1% 17%);
  z-index: 30;
}

.sidebar::before,
.panel::before,
.paper-card::before,
.wide-note::before,
.bottom-note::before,
.theme-toggle::before,
.mobile-nav-toggle::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 18%, transparent 82%, rgba(0, 0, 0, 0.03)),
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.14), transparent 22%),
    radial-gradient(circle at 80% 74%, rgba(0, 0, 0, 0.03), transparent 28%);
  opacity: 0.7;
}

.sidebar::after,
.panel::after,
.paper-card::after,
.wide-note::after,
.bottom-note::after {
  content: "";
  position: absolute;
  inset: 1px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0.25;
  pointer-events: none;
}

.sidebar-domain,
.mobile-brand {
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.3;
  position: relative;
  z-index: 1;
}

.sidebar-underline,
.heading-stroke {
  display: inline-block;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), rgba(84, 122, 168, 0.08));
}

.sidebar-underline {
  width: 2.6rem;
  margin-top: 0.75rem;
}

.heading-stroke {
  width: 4.4rem;
  margin-top: 0.7rem;
  transform: rotate(-2deg);
}

.heading-stroke-short {
  width: 3.15rem;
}

.sidebar-nav,
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.sidebar-nav a,
.mobile-nav a {
  position: relative;
  width: fit-content;
  font-size: 1.15rem;
  transition: color var(--motion-fast) ease;
}

.sidebar-nav a::after,
.mobile-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.26rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: scaleX(0.15);
  transform-origin: left;
  opacity: 0.28;
  transition: transform var(--motion-mid) ease, opacity var(--motion-mid) ease;
}

.sidebar-nav a:hover,
.sidebar-nav a:focus-visible,
.sidebar-nav a.is-active,
.mobile-nav a:hover,
.mobile-nav a:focus-visible,
.mobile-nav a.is-active {
  color: var(--accent);
}

.sidebar-nav a:hover::after,
.sidebar-nav a:focus-visible::after,
.sidebar-nav a.is-active::after,
.mobile-nav a:hover::after,
.mobile-nav a:focus-visible::after,
.mobile-nav a.is-active::after {
  transform: scaleX(1);
  opacity: 1;
}

.sidebar-note,
.about-note,
.theme-toggle,
.mobile-nav-toggle,
.paper-button,
.wide-note,
.paper-card,
.bottom-note,
.panel,
.mobile-header,
.mobile-nav {
  position: relative;
}

.sidebar-note,
.about-note {
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 78%, transparent);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.04)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
}

.sidebar-note {
  width: 9.2rem;
  margin-top: auto;
  padding: 1.7rem 1rem 1rem;
  border-radius: 11px 13px 18px 12px;
  transform: rotate(-3.5deg);
  transition: transform var(--motion-mid) ease, box-shadow var(--motion-mid) ease;
}

.sidebar-note:hover,
.sidebar-note:focus-within {
  transform: rotate(-1.75deg) translateY(-4px);
  box-shadow: 0 18px 26px rgba(77, 60, 39, 0.16);
}

.sidebar-note p,
.about-note p {
  margin: 0;
  font-family: var(--font-heading);
  position: relative;
  z-index: 1;
}

.sidebar-note p {
  color: var(--accent);
  font-size: 1.48rem;
  line-height: 1.32;
}

.about-note {
  width: 9rem;
  min-height: 9rem;
  display: grid;
  place-items: center;
  border-radius: 12px 14px 17px 15px;
  transform: rotate(2.7deg);
  transition: transform var(--motion-mid) ease, box-shadow var(--motion-mid) ease;
  animation: note-bob 9s ease-in-out infinite;
}

.about-note:hover {
  transform: rotate(1deg) translateY(-4px);
  box-shadow: 0 18px 26px rgba(77, 60, 39, 0.16);
}

.about-note p {
  color: var(--ink);
  font-size: 3.1rem;
  line-height: 1;
}

.tape {
  position: absolute;
  top: -0.45rem;
  left: 1rem;
  width: 2.8rem;
  height: 0.9rem;
  border-radius: 2px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0) 48%),
    rgba(108, 144, 188, 0.5);
  transform: rotate(-8deg);
  box-shadow: 0 2px 6px rgba(80, 62, 39, 0.12);
}

.sidebar-scribble,
.mini-scribble,
.corner-note,
.bottom-scribble {
  color: var(--muted-ink);
  font-family: var(--font-heading);
}

.sidebar-scribble {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.5;
  transform: rotate(-1deg);
  position: relative;
  z-index: 1;
}

.main-shell {
  width: calc(100% - var(--sidebar-width) - 1rem);
  margin-left: calc(var(--sidebar-width) + 1rem);
}

.desktop-theme-toggle-wrap {
  position: fixed;
  top: 1rem;
  right: max(0.85rem, calc((100vw - 1440px) / 2 + 0.85rem));
  z-index: 40;
}

.theme-toggle,
.mobile-nav-toggle {
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 80%, transparent);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.02)),
    var(--paper-panel-strong);
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 0.84rem;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-fast) ease,
    color var(--motion-fast) ease,
    border-color var(--motion-fast) ease,
    box-shadow var(--motion-mid) ease,
    background-color var(--motion-mid) ease;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-width: 5.6rem;
  padding: 0.52rem 0.82rem;
  border-radius: 999px;
}

.mobile-nav-toggle {
  min-width: 4.4rem;
  padding: 0.52rem 0.82rem;
  border-radius: 999px;
  text-transform: lowercase;
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.mobile-nav-toggle:hover,
.mobile-nav-toggle:focus-visible {
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 14px 24px rgba(77, 60, 39, 0.14);
}

.theme-toggle:active,
.mobile-nav-toggle:active,
.paper-button:active {
  transform: translateY(1px) scale(0.985);
}

.theme-icon {
  display: inline-block;
  transition: transform var(--motion-mid) ease;
}

html[data-theme="dark"] .theme-icon {
  transform: rotate(180deg);
}

.mobile-header,
.mobile-nav {
  display: none;
}

.content {
  max-width: var(--content-width);
  padding: 2.8rem 1.8rem 4rem;
}

.panel {
  padding: 1.95rem 1.95rem 1.75rem;
  border: 1px solid color-mix(in srgb, var(--paper-line) 74%, transparent);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.03)),
    var(--paper-panel);
  box-shadow: var(--shadow-deep);
  clip-path: polygon(1% 0.7%, 99% 0, 100% 5%, 99.4% 12%, 100% 21%, 99% 39%, 100% 56%, 99.5% 72%, 100% 89%, 98.5% 99.4%, 92% 100%, 77% 99.2%, 63% 100%, 48% 99.2%, 34% 100%, 17% 99.1%, 3% 100%, 0 96%, 0.6% 79%, 0 61%, 0.7% 43%, 0 25%, 0.9% 11%);
  transition:
    opacity var(--motion-slow) ease,
    transform var(--motion-slow) ease,
    box-shadow var(--motion-mid) ease,
    background-color var(--motion-mid) ease,
    border-color var(--motion-mid) ease;
}

.panel + .panel {
  margin-top: 1.55rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.55fr);
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: center;
  padding-bottom: 2rem;
  border-bottom: 1px solid color-mix(in srgb, var(--paper-line) 70%, transparent);
}

.hero h1,
.page-heading h2 {
  margin: 0;
  font-family: var(--font-heading);
}

.hero h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 6.8vw, 5.25rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 1.2rem 0 0;
  max-width: 29rem;
  font-size: clamp(1.05rem, 1.55vw, 1.28rem);
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.paper-button {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  padding: 0.95rem 1.2rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 78%, transparent);
  border-radius: 10px 11px 13px 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
  color: var(--accent);
  font-family: var(--font-heading);
  font-size: 1rem;
  transition:
    transform var(--motion-fast) ease,
    box-shadow var(--motion-mid) ease,
    color var(--motion-fast) ease,
    border-color var(--motion-fast) ease;
}

.paper-button span,
.wide-note span:last-child,
.paper-card a {
  display: inline-block;
  transition: transform var(--motion-fast) ease;
}

.paper-button:hover,
.paper-button:focus-visible,
.wide-note:hover,
.wide-note:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 16px 26px rgba(77, 60, 39, 0.14);
}

.paper-button:hover span,
.paper-button:focus-visible span,
.wide-note:hover span:last-child,
.wide-note:focus-visible span:last-child,
.paper-card:hover a,
.paper-card:focus-within a {
  transform: translateX(4px);
}

.hero-objects {
  position: relative;
  min-height: 18rem;
}

.hero-objects::after {
  content: "";
  position: absolute;
  top: 1.8rem;
  right: 5rem;
  width: 10rem;
  height: 5.4rem;
  border-top: 2px dashed color-mix(in srgb, var(--accent) 35%, var(--paper-line-strong));
  border-radius: 50%;
  opacity: 0.65;
  transform: rotate(14deg);
}

.float-object {
  position: absolute;
  pointer-events: none;
}

.paper-plane {
  top: 0.2rem;
  right: 1.35rem;
  width: 10rem;
  height: 7.8rem;
  filter: drop-shadow(0 22px 24px rgba(78, 61, 39, 0.22));
  animation: plane-float 16s ease-in-out infinite;
}

.plane-wing,
.plane-tail {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 92%, transparent);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.1)),
    var(--paper-panel-strong);
}

.wing-a {
  inset: 0;
  clip-path: polygon(0 36%, 100% 0, 45% 72%);
  transform: rotate(8deg);
}

.wing-b {
  right: 0.7rem;
  bottom: 0.8rem;
  width: 58%;
  height: 48%;
  clip-path: polygon(0 0, 100% 100%, 18% 88%);
  transform: rotate(9deg);
}

.plane-tail {
  left: 1.8rem;
  bottom: 0.95rem;
  width: 1.75rem;
  height: 2.85rem;
  clip-path: polygon(0 0, 100% 24%, 36% 100%);
  transform: rotate(24deg);
}

.paper-cube {
  top: 7.1rem;
  left: 1.2rem;
  width: 5.8rem;
  height: 5.8rem;
  animation: cube-drift 18s linear infinite;
}

.cube-face {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 94%, transparent);
  box-shadow: 0 14px 24px rgba(84, 66, 44, 0.16);
}

.face-front {
  inset: 1.4rem 0 0 1.4rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03));
}

.face-top {
  inset: 0 1.4rem 1.4rem 1.4rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.08));
  transform: skewX(-36deg);
  transform-origin: bottom left;
}

.face-side {
  inset: 1.4rem 0 0 auto;
  width: 1.4rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.02));
  transform: skewY(-54deg);
  transform-origin: top left;
}

.paper-bubble {
  right: 0.2rem;
  bottom: 0.6rem;
  max-width: 10.4rem;
  padding: 1rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 74%, transparent);
  border-radius: 8px 15px 18px 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.05)),
    color-mix(in srgb, var(--paper-note) 82%, var(--paper-panel-strong));
  box-shadow: var(--shadow-paper);
  animation: bubble-wobble 11s ease-in-out infinite;
}

.paper-bubble::before {
  content: "";
  position: absolute;
  top: -0.42rem;
  left: 3rem;
  width: 2.3rem;
  height: 0.7rem;
  border-radius: 2px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0) 48%),
    rgba(218, 194, 135, 0.75);
  transform: rotate(7deg);
}

.paper-bubble::after {
  content: "";
  position: absolute;
  right: 1rem;
  bottom: -0.5rem;
  width: 1rem;
  height: 1rem;
  background: inherit;
  border-right: 1px solid color-mix(in srgb, var(--paper-line-strong) 74%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--paper-line-strong) 74%, transparent);
  transform: rotate(34deg);
}

.paper-bubble p {
  margin: 0;
  color: var(--paper-note-ink);
  font-family: var(--font-heading);
  font-size: 1.22rem;
  line-height: 1.35;
}

.mini-scribble {
  position: absolute;
  font-size: 0.82rem;
  line-height: 1.45;
}

.mini-scribble-top {
  right: 1.3rem;
  top: 5.4rem;
  max-width: 8rem;
  transform: rotate(-2deg);
}

.mini-scribble-bottom {
  margin: 0.9rem 0 0;
  font-size: 0.8rem;
  transform: rotate(-2deg);
}

.featured {
  padding-top: 1.7rem;
}

.section-heading p,
.page-heading p {
  margin: 0;
  color: var(--muted-ink);
  font-family: var(--font-heading);
  font-size: 0.95rem;
}

.page-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--paper-line) 70%, transparent);
}

.page-heading-simple {
  display: block;
  margin-bottom: 1rem;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-heading h2 {
  font-size: clamp(1.95rem, 3vw, 2.35rem);
  line-height: 1.15;
}

.corner-note {
  max-width: 9rem;
  font-size: 0.88rem;
  line-height: 1.55;
  transform: rotate(-2deg);
}

.card-grid {
  display: grid;
  gap: 1.15rem;
}

.card-grid-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.paper-card {
  min-height: 182px;
  padding: 1.12rem 1.05rem 1.18rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 74%, transparent);
  border-radius: 10px 12px 15px 11px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
  transition:
    transform var(--motion-fast) ease,
    box-shadow var(--motion-mid) ease,
    border-color var(--motion-fast) ease;
}

.paper-card:hover,
.paper-card:focus-within {
  transform: translateY(-7px) rotate(-0.45deg);
  box-shadow: 0 20px 28px rgba(77, 60, 39, 0.14);
}

.paper-card h2,
.paper-card h3 {
  margin: 0;
  font-size: clamp(1.14rem, 1.75vw, 1.3rem);
  line-height: 1.35;
}

.paper-card p {
  margin: 0.75rem 0 1rem;
  color: var(--muted-ink);
  font-size: 0.98rem;
  line-height: 1.68;
}

.paper-card a,
.wide-note,
.bottom-note p:last-child {
  color: var(--accent);
}

.paper-card a,
.wide-note span:last-child {
  font-family: var(--font-heading);
  font-size: 0.95rem;
}

.card-icon {
  width: 2.45rem;
  height: 2.45rem;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 74%, transparent);
  border-radius: 8px;
  background: rgba(84, 122, 168, 0.08);
  color: var(--accent);
  font-family: var(--font-heading);
  font-size: 0.86rem;
}

.wide-note,
.bottom-note {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 72%, transparent);
  border-radius: 10px 12px 16px 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-soft);
}

.wide-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: transform var(--motion-fast) ease, box-shadow var(--motion-mid) ease;
}

.wide-note span:first-child,
.home-ending p,
.bottom-note p:first-child,
.about-text p,
.about-text li {
  font-size: 1rem;
  line-height: 1.75;
}

.home-ending {
  display: flex;
  gap: 1rem;
  padding-top: 1.2rem;
  color: var(--muted-ink);
  font-family: var(--font-heading);
}

.home-ending p,
.bottom-note p {
  margin: 0;
}

.home-ending p {
  font-size: 0.9rem;
}

.bottom-note p {
  color: var(--muted-ink);
  font-family: var(--font-heading);
}

.bottom-note p + p {
  margin-top: 0.35rem;
}

.about-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 2rem;
  align-items: center;
}

.about-text p {
  margin: 0 0 0.7rem;
}

.about-text ul {
  margin: 0.2rem 0 0.9rem 1.1rem;
  padding: 0;
}

.about-note-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.loading-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--paper-bg);
  z-index: 90;
  transition: opacity 420ms ease, visibility 420ms ease;
}

.loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-paper {
  padding: 1rem 1.25rem;
  border: 1px solid color-mix(in srgb, var(--paper-line-strong) 76%, transparent);
  border-radius: 10px 12px 16px 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.02)),
    var(--paper-panel-strong);
  box-shadow: var(--shadow-paper);
  transform: rotate(-1.5deg);
}

.loading-paper p {
  margin: 0;
  color: var(--muted-ink);
  font-family: var(--font-heading);
  font-size: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.paper-button:focus-visible,
.wide-note:focus-visible,
.paper-card:focus-visible,
.theme-toggle:focus-visible,
.mobile-nav-toggle:focus-visible,
.sidebar-nav a:focus-visible,
.mobile-nav a:focus-visible,
.sidebar-domain:focus-visible,
.mobile-brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@keyframes plane-float {
  0%,
  100% {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }
  50% {
    transform: translate3d(0, -10px, 0) rotate(2deg);
  }
}

@keyframes cube-drift {
  0% {
    transform: rotate(0deg) translateY(0);
  }
  50% {
    transform: rotate(180deg) translateY(-5px);
  }
  100% {
    transform: rotate(360deg) translateY(0);
  }
}

@keyframes bubble-wobble {
  0%,
  100% {
    transform: rotate(0.6deg);
  }
  25% {
    transform: rotate(-1.1deg);
  }
  55% {
    transform: rotate(1.3deg);
  }
  78% {
    transform: rotate(-0.7deg);
  }
}

@keyframes note-bob {
  0%,
  100% {
    transform: rotate(2.7deg) translateY(0);
  }
  50% {
    transform: rotate(1.4deg) translateY(-4px);
  }
}

@media (max-width: 1280px) {
  .site-shell {
    width: calc(100% - 1.3rem);
  }

  .sidebar {
    left: 0.7rem;
  }

  .desktop-theme-toggle-wrap {
    right: 0.9rem;
  }
}

@media (max-width: 980px) {
  .sidebar {
    display: none;
  }

  .main-shell {
    width: 100%;
    margin-left: 0;
  }

  .desktop-theme-toggle-wrap {
    display: none;
  }

  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 35;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.1rem;
    border: 1px solid color-mix(in srgb, var(--paper-line) 70%, transparent);
    border-bottom-width: 0;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.03)),
      var(--paper-panel);
    box-shadow: var(--shadow-soft);
  }

  .mobile-brand {
    font-size: 0.88rem;
  }

  .mobile-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    position: relative;
  }

  .mobile-actions .theme-toggle,
  .mobile-nav-toggle {
    min-height: 2.05rem;
    padding: 0.46rem 0.78rem;
    font-size: 0.78rem;
    line-height: 1;
    border-radius: 999px;
  }

  .mobile-nav-toggle {
    min-width: 4.6rem;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03)),
      color-mix(in srgb, var(--paper-panel-strong) 86%, var(--paper-bg));
  }

  .mobile-nav {
    display: none;
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    min-width: 11.5rem;
    padding: 0.8rem 0.9rem;
    border: 1px solid color-mix(in srgb, var(--paper-line) 70%, transparent);
    border-radius: 12px 14px 18px 12px;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.02)),
      var(--paper-panel-strong);
    box-shadow: var(--shadow-paper);
    z-index: 36;
    clip-path: polygon(2% 1%, 98% 0, 100% 11%, 99% 28%, 100% 49%, 99% 71%, 100% 92%, 97% 100%, 8% 99%, 0 95%, 1% 76%, 0 54%, 1% 31%, 0 10%);
  }

  .mobile-nav.open {
    display: flex;
  }

  .mobile-nav::before {
    content: "";
    position: absolute;
    top: -0.38rem;
    right: 1.2rem;
    width: 2.1rem;
    height: 0.62rem;
    border-radius: 2px;
    background:
      linear-gradient(135deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0) 48%),
      rgba(108, 144, 188, 0.45);
    transform: rotate(8deg);
    box-shadow: 0 2px 6px rgba(77, 60, 39, 0.12);
  }

  .mobile-nav a {
    font-size: 1rem;
  }

  .content {
    padding: 1.15rem 1rem 3.2rem;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 8vw, 4.2rem);
  }

  .hero-objects {
    min-height: 15rem;
  }

  .card-grid-four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-panel {
    grid-template-columns: 1fr;
  }

  .about-note-wrap {
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: calc(100% - 0.9rem);
    margin: 0.45rem auto;
  }

  .panel {
    padding: 1.35rem 1.15rem 1.3rem;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.25rem, 9vw, 3.2rem);
  }

  .hero-actions,
  .wide-note,
  .page-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .card-grid-four {
    grid-template-columns: 1fr;
  }

  .hero-objects {
    min-height: 13.75rem;
  }

  .paper-plane {
    width: 7.7rem;
    height: 6rem;
    right: 0.35rem;
  }

  .paper-cube {
    top: 5.8rem;
    left: 0.3rem;
    width: 4.9rem;
    height: 4.9rem;
  }

  .paper-bubble {
    right: 0.1rem;
    bottom: 0.1rem;
    max-width: 8.35rem;
    padding: 0.9rem 0.85rem;
  }

  .paper-bubble p {
    font-size: 1.08rem;
  }

  .mini-scribble-top {
    right: 0.45rem;
    top: 0.7rem;
    max-width: 5rem;
    font-size: 0.76rem;
    text-align: right;
  }

  .hero-objects::after {
    width: 7rem;
    right: 3.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal.revealed {
    opacity: 1;
    transform: none;
  }
}