/* Neutral reading surfaces; the artwork and small gold details carry color. */
:root {
  --rk-ink: oklch(27% 0.004 90);
  --rk-muted: oklch(45% 0.005 90);
  --rk-accent: oklch(31% 0.004 90);
  --rk-gold: oklch(52% 0.08 80);
  --rk-surface: oklch(99% 0 0);
  --rk-night: oklch(16% 0.003 90);
  --rk-line: oklch(85% 0.003 90);
  --rk-on-accent: oklch(99% 0 0);
  --rk-link: oklch(48% 0.045 235);
  --rk-control-surface: oklch(96% 0.008 235);
  --theme-color: var(--rk-accent);
  --font-color: var(--rk-ink);
  --text-highlight-color: var(--rk-ink);
  --btn-bg: var(--rk-accent);
  --btn-color: var(--rk-on-accent);
  --card-bg: var(--rk-surface);
}
[data-theme='dark'] {
  color-scheme: dark;
  --rk-ink: oklch(94% 0.003 90);
  --rk-muted: oklch(76% 0.004 90);
  --rk-accent: oklch(89% 0.006 90);
  --rk-gold: oklch(79% 0.09 85);
  --rk-surface: oklch(22% 0.003 90);
  --rk-line: oklch(42% 0.003 90);
  --rk-on-accent: oklch(22% 0.003 90);
  --rk-link: oklch(78% 0.035 235);
  --rk-control-surface: oklch(29% 0.008 235);
  --font-color: var(--rk-ink);
  --text-highlight-color: var(--rk-ink);
  --card-bg: var(--rk-surface);
  --sidebar-bg: var(--rk-surface);
  --search-bg: var(--rk-surface);
  --search-input-color: var(--rk-ink);
  --global-bg: var(--rk-night);
  --btn-bg: var(--rk-accent);
  --hl-bg: oklch(19% 0 0);
  --hltools-bg: oklch(27% 0 0);
  --hlnumber-bg: oklch(19% 0 0);
}
html body { background-color: oklch(95% 0 0); }
[data-theme='dark'] body { background-color: var(--rk-night); }
#web_bg, #page-header { animation: none; }
#web_bg::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, oklch(99% 0 0 / .92) 0%, oklch(99% 0 0 / .78) 38%, transparent 70%);
  pointer-events: none;
}
[data-theme='dark'] #web_bg::before {
  background: linear-gradient(90deg, oklch(16% 0 0 / .86) 0%, oklch(16% 0 0 / .55) 40%, transparent 72%);
}
/* Keep the artwork clear in the hero; content surfaces carry reading contrast. */
#page-header.full_page { min-height: 860px; height: 100svh; max-height: 1200px; }
#page-header.full_page::before { background: transparent; }
#page-header.full_page #site-info {
  top: 50%; left: clamp(32px, 7.5vw, 160px); transform: translateY(-45%);
  width: min(43%, 620px); padding: 0; text-align: left;
}
#page-header .rikka-hero #site-title {
  font-family: var(--global-font), 'PingFang SC', sans-serif;
  font-size: clamp(42px, 5.25vw, 80px) !important; font-weight: 700;
  line-height: 1.2; letter-spacing: -.025em; text-align: left;
  color: var(--rk-ink); margin: 0 0 24px; overflow-wrap: anywhere;
}
#page-header .rikka-hero #site-subtitle {
  font-size: clamp(16px, 1.5vw, 21px); line-height: 1.9;
  text-align: left; color: var(--rk-ink); margin: 0 0 32px;
}
#page-header .rikka-hero :is(#site-title, #site-subtitle),
#site-name { animation: none !important; text-shadow: none !important; }
.rikka-hero-label {
  display: flex; align-items: center; gap: 12px; margin: 0 0 28px;
  color: var(--rk-accent); font-size: 14px; letter-spacing: .08em;
}
.rikka-ribbon {
  display: inline-block; width: 24px; height: 18px; flex-shrink: 0;
  background: #e4bd62;
  clip-path: polygon(0 0, 46% 28%, 54% 28%, 100% 0, 94% 100%, 53% 68%, 47% 68%, 6% 100%);
  transform: rotate(-12deg);
}
.rikka-hero-actions { display: flex; align-items: center; gap: 28px; }
#page-header .rikka-read {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 32px;
  min-height: 48px; padding: 10px 24px; border-radius: 8px;
  background: var(--rk-accent); color: var(--rk-on-accent); font-size: 15px;
  transition: background .2s ease-out, transform .2s ease-out;
}
#page-header .rikka-read:hover { background: var(--rk-ink); transform: translateY(-2px); }
#page-header .rikka-about-link { color: var(--rk-ink); padding: 12px 0; font-size: 15px; }
#page-header .rikka-about-link:hover { text-decoration: underline; text-underline-offset: 5px; }
[data-theme='dark'] #page-header .rikka-read { background: var(--rk-accent); color: var(--rk-on-accent); }
[data-theme='dark'] #page-header .rikka-read:hover { background: var(--rk-ink); }
.rikka-world-note { margin: 32px 0 0; font-size: 13px; line-height: 1.8; color: var(--rk-muted); max-width: 35em; }
/* Two staggered rows frame the coder; every guest remains visible. */
.rikka-hero-guests {
  display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); align-items: end;
  gap: 12px 6px; width: min(540px, calc(100% - 48px)); margin: 20px 0 0 48px;
  pointer-events: none; user-select: none;
}
.rikka-hero-guest {
  display: block; grid-column: span 2; width: 100%; height: clamp(80px, 8vw, 112px);
  object-fit: contain; object-position: center bottom;
  filter: drop-shadow(0 3px 3px oklch(20% 0.01 260 / .12));
  animation: none; transition: none;
}
.rikka-hero-guest--coder { grid-column: span 4; height: clamp(104px, 10vw, 136px); }
.rikka-hero-guest:nth-child(1), .rikka-hero-guest:nth-child(5) { margin-bottom: 12px; }
.rikka-hero-guest:nth-child(7), .rikka-hero-guest:nth-child(10) { margin-bottom: 6px; }
.rikka-night-note, [data-theme='dark'] .rikka-day-note { display: none; }
[data-theme='dark'] .rikka-night-note { display: inline; }
.rikka-sigil {
  position: absolute; top: 120px; right: 8vw; width: 128px; height: 128px;
  display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%;
  color: var(--rk-gold); opacity: 0; pointer-events: none;
}
.rikka-sigil::before { content: ''; position: absolute; inset: 12px; border: 1px solid currentColor; transform: rotate(45deg); }
.rikka-sigil::after { content: ''; position: absolute; inset: 24px; border: 1px solid currentColor; border-radius: 50%; }
.rikka-sigil span { font-size: 30px; }
[data-theme='dark'] .rikka-sigil { opacity: 0; }
#page-header.full_page #scroll-down { bottom: 18px; }
#page-header.full_page #scroll-down .scroll-down-effects { color: var(--rk-accent); animation: none; }
#content-inner { scroll-margin-top: 80px; }
#content-inner > #recent-posts { min-width: 0; }

/* Navigation is readable over both halves of the wallpaper. */
#page-header #nav { background: var(--rk-surface); color: var(--rk-ink); box-shadow: none; }
#page-header #nav :is(a, .site-page, #site-name) { color: var(--rk-ink); text-shadow: none; }
#page-header #nav .menus_item_child { background: var(--rk-surface); }
[data-theme='dark'] #page-header #nav { background: var(--rk-surface); }
#page-header #nav #nightmode-button, .rikka-mode-toggle {
  display: inline-flex; align-items: center; justify-content: center; vertical-align: middle;
  width: 44px; height: 44px; padding: 0; margin: 0; border: 0; border-radius: 50%;
  background: transparent; color: var(--rk-ink); cursor: pointer;
}
.rikka-eye { position: relative; display: block; width: 24px; height: 17px; border: 1.5px solid currentColor; border-radius: 5px 5px 10px 10px; transform: rotate(-12deg); }
.rikka-eye::before, .rikka-eye::after { content: ''; position: absolute; top: 5px; width: 5px; border-top: 1px solid currentColor; }
.rikka-eye::before { left: -6px; }
.rikka-eye::after { right: -6px; }
.rikka-eye-pupil { display: none; }
[data-theme='dark'] .rikka-eye { border-color: var(--rk-gold); border-radius: 75% 15%; transform: rotate(45deg); width: 22px; height: 22px; }
[data-theme='dark'] .rikka-eye::before, [data-theme='dark'] .rikka-eye::after { display: none; }
[data-theme='dark'] .rikka-eye-pupil { display: block; position: absolute; inset: 5px; border-radius: 50%; background: var(--rk-gold); }
#nightmode-button:hover { background: color-mix(in srgb, var(--rk-ink) 8%, transparent); }
:is(.rikka-mode-toggle, .rikka-read, .rikka-about-link):focus-visible { outline: 2px solid var(--rk-accent); outline-offset: 5px; }

/* A brief character performance sits below the navigation, above page content. */
:root { --layer-rikka-feedback: 110; }
.rikka-seal {
  position: fixed; z-index: var(--layer-rikka-feedback);
  top: max(76px, env(safe-area-inset-top)); right: max(24px, env(safe-area-inset-right));
  width: min(320px, calc(100vw - 32px)); margin: 0; overflow: hidden;
  border: 1px solid #a88b51; border-radius: 12px;
  color: oklch(96% 0 0); background: oklch(22% 0 0);
  animation: rikka-seal-arrive 420ms cubic-bezier(.16, 1, .3, 1);
}
.rikka-seal-scene { aspect-ratio: 500 / 282; overflow: hidden; background: oklch(16% 0 0); }
.rikka-seal-scene video { display: block; width: 100%; height: 100%; object-fit: cover; }
.rikka-seal-copy { padding: 18px 22px 20px; }
.rikka-seal-copy strong {
  display: block; color: #f1ce7e; font-size: 25px; font-weight: 700;
  line-height: 1.4; letter-spacing: .025em;
  animation: rikka-seal-words 600ms cubic-bezier(.16, 1, .3, 1);
}
.rikka-seal-copy p { margin: 6px 0 0; color: oklch(80% 0 0); font-size: 13px; line-height: 1.6; }
.rikka-seal-close {
  position: absolute; top: 6px; right: 6px; display: grid; place-items: center;
  width: 36px; height: 36px; border: 0; border-radius: 50%; padding: 0;
  color: #fff; background: oklch(22% 0 0); font-size: 24px; line-height: 1; cursor: pointer;
}
.rikka-seal-close:hover { background: oklch(35% 0 0); }
.rikka-seal-close:focus-visible { outline: 2px solid #f1ce7e; outline-offset: -4px; }
.rikka-seal[data-mode='day'] { background: var(--rk-surface); border-color: var(--rk-line); }
.rikka-seal[data-mode='day'] .rikka-seal-copy { padding-right: 48px; }
.rikka-seal[data-mode='day'] strong { color: var(--rk-ink); font-size: 19px; }
.rikka-seal[data-mode='day'] p { color: var(--rk-muted); }
.rikka-seal[data-mode='day'] .rikka-seal-close { color: var(--rk-ink); background: transparent; }
#rikka-theme-status {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}
@keyframes rikka-seal-arrive {
  from { opacity: 0; transform: translateY(-10px) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes rikka-seal-words {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 800px) {
  .rikka-seal { right: max(16px, env(safe-area-inset-right)); }
  .rikka-seal-close { width: 44px; height: 44px; }
}
@media (max-height: 450px) {
  .rikka-seal { width: 250px; top: 66px; }
  .rikka-seal-copy { padding: 10px 16px; }
  .rikka-seal-copy strong { font-size: 21px; }
}

/* The same ribbon and a quiet golden ring identify the author. */
.card-info-avatar { position: relative; }
.rikka-avatar-ribbon { position: absolute; top: 3px; left: calc(50% + 24px); z-index: 1; }
#aside-content .avatar-img { outline: 1px solid transparent; outline-offset: 5px; transition: outline-color .2s ease-out; box-shadow: none; }
#aside-content .card-info:hover .avatar-img { outline-color: var(--rk-gold); }
#aside-content .avatar-img img:hover { transform: none; }
#rightside :is(button, a) { color: var(--rk-on-accent); }
#rightside #go-up { color: var(--rk-on-accent); background: var(--rk-accent); }
#rightside #go-up:hover { background: var(--rk-ink); }
#rightside #go-up:focus-visible { outline: 2px solid var(--rk-gold); outline-offset: 3px; }
/* Hidden settings must neither extend the viewport nor remain keyboard targets. */
#rightside #rightside-config-hide:not(.show):not(.status) { visibility: hidden; transform: none; }
:is(#recent-posts > .recent-post-item, #aside-content .card-widget, #post, #page, #archive, #tag, #category) { background: var(--rk-surface) !important; }
#article-container :is(p, li) > a { color: var(--rk-link) !important; }

@media (max-width: 800px) {
  #page-header.full_page {
    height: 100svh; min-height: 860px; max-height: 1100px;
    background-color: var(--rk-surface);
    background-image: linear-gradient(180deg, var(--rk-surface), transparent 32%), var(--mobileday-bg, url('/assets/rikka-scenes/seaside-small.webp'));
    background-size: 100% 48%, auto 48%;
    background-position: center bottom, 76% bottom;
    background-repeat: no-repeat;
    background-attachment: scroll;
  }
  [data-theme='dark'] #page-header.full_page {
    background-image: linear-gradient(180deg, var(--rk-surface), transparent 32%), var(--mobilenight-bg, url('/assets/rikka-scenes/moonlight-small.webp'));
    background-position: center bottom, 72% bottom;
  }
  #page-header.full_page #site-info { top: 108px; left: 7%; width: 86%; transform: none; }
  #page-header .rikka-hero #site-title { font-size: clamp(38px, 9vw, 60px) !important; margin-bottom: 12px; }
  #page-header .rikka-hero #site-subtitle { font-size: 16px; line-height: 1.8; margin-bottom: 20px; }
  .rikka-hero-label { font-size: 12px; margin-bottom: 16px; }
  .rikka-world-note { display: none; }
  .rikka-hero-guests {
    grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 8px 4px;
    width: min(100%, 420px); margin: 16px 0 0;
  }
  .rikka-hero-guests .rikka-hero-guest { grid-column: span 2; height: clamp(76px, 23vw, 104px); margin: 0; }
  .rikka-hero-guests .rikka-hero-guest:nth-child(9) { grid-column: 2 / span 2; }
  .rikka-hero-actions { gap: 24px; }
  #page-header .rikka-read { padding: 10px 20px; min-height: 46px; }
  #web_bg::before { background: linear-gradient(180deg, oklch(99% 0 0 / .9) 0, oklch(99% 0 0 / .8) 24%, transparent 58%); }
  [data-theme='dark'] #web_bg::before { background: linear-gradient(180deg, oklch(16% 0 0 / .96) 0%, oklch(16% 0 0 / .85) 32%, oklch(16% 0 0 / .4) 78%); }
  .rikka-sigil { top: auto; bottom: 54px; right: 8%; width: 84px; height: 84px; }
  .rikka-sigil::before { inset: 9px; }
  .rikka-sigil::after { inset: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  .rikka-seal, .rikka-seal * { animation: none !important; transition: none !important; }
  .rikka-read, #aside-content .avatar-img { transition: none !important; }
  #page-header .rikka-read:hover { transform: none; }
}
@media print { .rikka-seal, #rikka-theme-status { display: none !important; } }