/* ============================================================
   mujun.wiki - An Encyclopedia of Contradictions
   Pixel-Art Naturalism | Earth-Tone Palette
   ============================================================ */

/* -- Custom Properties ------------------------------------ */
:root {
    --sandstone-cream: #F2E8D5;
    --river-clay: #B8703D;
    --bark-brown: #3D2B1F;
    --dried-moss: #6B7F4E;
    --rain-slate: #5C6B73;
    --warm-parchment: #E8DCC8;
    --bubble-blue: #7BA7BC;
    --deep-loam: #2A1F14;
    --river-clay-dark: #A05E2F;
    --sand-translucent: rgba(200, 170, 130, 0.2);
    --bubble-blue-alpha: rgba(123, 167, 188, 0.5);
    --bubble-blue-glow: rgba(123, 167, 188, 0.15);

    --font-display: 'Zilla Slab', serif;
    --font-body: 'Source Sans 3', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

/* -- Reset & Base ----------------------------------------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    line-height: 1.72;
    color: var(--bark-brown);
    background-color: var(--sandstone-cream);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img, svg {
    image-rendering: pixelated;
}

a {
    color: var(--river-clay);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--bubble-blue);
}

/* Link hover underline draw effect */
a:not(.compass-option):not(.signpost)::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--bubble-blue);
    transition: width 0.3s ease;
}

a:not(.compass-option):not(.signpost):hover::before {
    width: 100%;
}

/* Link hover bubble rise effect */
a:not(.compass-option):not(.signpost):not(.nav-brand)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--bubble-blue-alpha);
    box-shadow: inset -1px -1px 0 rgba(255,255,255,0.4);
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(0);
}

a:not(.compass-option):not(.signpost):not(.nav-brand):hover::after {
    animation: bubbleRise 600ms ease-out forwards;
}

@keyframes bubbleRise {
    0% { opacity: 0.8; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}

/* -- Bubble Curtain (Page Load) --------------------------- */
#bubble-curtain {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--deep-loam);
    pointer-events: none;
    animation: curtainFade 800ms 1.9s ease forwards;
}

#bubble-curtain.done {
    display: none;
}

@keyframes curtainFade {
    0% { opacity: 1; }
    100% { opacity: 0; pointer-events: none; }
}

.curtain-bubble {
    position: absolute;
    bottom: -30px;
    left: var(--x);
    width: var(--size);
    height: var(--size);
    border-radius: 50%;
    background: var(--bubble-blue-alpha);
    box-shadow: inset -1px -1px 0 rgba(255,255,255,0.4);
    opacity: 0;
    animation: curtainBubbleRise 1.5s var(--delay) ease-out forwards;
}

@keyframes curtainBubbleRise {
    0% {
        opacity: 0.8;
        transform: translateY(0);
    }
    80% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-100vh);
    }
}

/* -- Scroll Progress Bar ---------------------------------- */
#scroll-progress {
    position: fixed;
    right: 0;
    top: 0;
    width: 3px;
    height: 100vh;
    background: rgba(123, 167, 188, 0.15);
    z-index: 900;
}

#scroll-progress-fill {
    width: 100%;
    height: 0%;
    background: var(--bubble-blue);
    border-radius: 0 0 2px 2px;
    transition: height 0.1s linear;
    box-shadow: 0 0 4px var(--bubble-blue-glow);
}

/* -- Compass Rose Navigation ------------------------------ */
#compass-nav {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 950;
    opacity: 0;
    transition: opacity 0.6s ease;
}

#compass-nav.visible {
    opacity: 1;
}

.compass-rose {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 50%;
    background: var(--warm-parchment);
    border: 2px solid var(--river-clay);
    box-shadow: 0 2px 8px rgba(42, 31, 20, 0.2);
    transition: transform 0.4s ease, box-shadow 0.3s ease;
}

.compass-rose:hover {
    box-shadow: 0 4px 16px rgba(42, 31, 20, 0.3);
}

.compass-icon {
    width: 24px;
    height: 24px;
    animation: compassRotate 12s steps(8) infinite;
}

@keyframes compassRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.compass-menu {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
    transition: width 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                height 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.3s ease;
}

#compass-nav.expanded .compass-menu {
    width: 160px;
    height: 160px;
    opacity: 1;
    pointer-events: auto;
}

.compass-option {
    position: absolute;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--warm-parchment);
    border: 2px solid var(--river-clay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.3s ease,
                background 0.2s ease;
}

.compass-option:hover {
    background: var(--sandstone-cream);
}

.compass-option::before {
    display: none;
}

.compass-option::after {
    display: none;
}

#compass-nav.expanded .compass-option {
    opacity: 1;
    transform: scale(1);
}

/* Radial positions for 6 options */
.compass-option[data-dir="n"]  { bottom: calc(100% - 14px); right: calc(50% - 14px); }
.compass-option[data-dir="ne"] { bottom: calc(100% - 34px); right: -4px; }
.compass-option[data-dir="e"]  { bottom: calc(50% - 14px); right: -4px; }
.compass-option[data-dir="s"]  { bottom: -4px; right: calc(50% - 14px); }
.compass-option[data-dir="w"]  { bottom: calc(50% - 14px); right: calc(100% - 34px); }
.compass-option[data-dir="nw"] { bottom: calc(100% - 34px); right: calc(100% - 34px); }

.compass-option svg {
    width: 16px;
    height: 16px;
}

/* Mobile compass as bottom-center pill */
@media (max-width: 640px) {
    #compass-nav {
        bottom: 16px;
        right: 50%;
        transform: translateX(50%);
    }

    .compass-rose {
        border-radius: 20px;
        width: 48px;
        height: 36px;
    }
}

/* -- Title Screen ----------------------------------------- */
.title-screen {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--deep-loam);
    scroll-snap-align: start;
    position: relative;
    overflow: hidden;
    animation: titleBgFade 800ms 1.9s ease forwards;
}

@keyframes titleBgFade {
    from { background-color: var(--deep-loam); }
    to { background-color: var(--sandstone-cream); }
}

.title-content {
    text-align: center;
    position: relative;
    z-index: 10;
}

.title-domain {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 5rem);
    color: var(--bark-brown);
    letter-spacing: 0.02em;
    line-height: 1.1;
    opacity: 0;
    animation: titleReveal 0.1s 2.3s steps(1) forwards;
}

@keyframes titleReveal {
    to { opacity: 1; }
}

.title-char {
    display: inline-block;
    opacity: 0;
    transform: translateY(-4px);
    animation: charSnap 0.1s calc(2.3s + var(--i) * 40ms) steps(1) forwards;
}

@keyframes charSnap {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.title-subtitle {
    font-family: var(--font-body);
    font-style: italic;
    font-weight: 400;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--bark-brown);
    opacity: 0;
    margin-top: 0.6em;
    animation: subtitleFade 600ms 2.9s ease forwards;
}

@keyframes subtitleFade {
    from { opacity: 0; }
    to { opacity: 0.5; }
}

.title-compass {
    margin-top: 2rem;
    opacity: 0;
    animation: compassAppear 400ms 3.2s ease forwards;
}

.title-compass svg {
    animation: compassRotate 12s steps(8) infinite;
}

@keyframes compassAppear {
    from { opacity: 0; }
    to { opacity: 0.7; }
}

.title-scroll-hint {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--rain-slate);
    letter-spacing: 0.1em;
    margin-top: 2rem;
    opacity: 0;
    animation: hintPulse 2s 3.6s ease-in-out infinite;
}

@keyframes hintPulse {
    0%, 100% { opacity: 0; }
    50% { opacity: 0.5; }
}

/* -- Tile Separator (Bubble strip) ------------------------ */
.tile-separator {
    position: relative;
    height: 60px;
    background: linear-gradient(180deg, var(--sandstone-cream) 0%, var(--warm-parchment) 50%, var(--sandstone-cream) 100%);
    overflow: hidden;
}

/* Pixel-art top border (mountain treeline) */
.tile-separator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 4px,
        var(--dried-moss) 4px,
        var(--dried-moss) 6px,
        transparent 6px,
        transparent 8px,
        var(--dried-moss) 8px,
        var(--dried-moss) 12px,
        transparent 12px,
        transparent 16px
    );
    background-size: 16px 6px;
    image-rendering: pixelated;
    opacity: 0.4;
}

/* Pixel-art bottom border (wavy water line) */
.tile-separator::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        var(--bubble-blue) 0px,
        var(--bubble-blue) 4px,
        transparent 4px,
        transparent 6px,
        var(--bubble-blue) 6px,
        var(--bubble-blue) 10px,
        transparent 10px,
        transparent 12px
    );
    background-size: 12px 4px;
    image-rendering: pixelated;
    opacity: 0.35;
}

/* Water-bubble glow at center */
.tile-separator {
    background-image: radial-gradient(circle at 50% 80%, var(--bubble-blue-glow) 0%, transparent 60%);
}

.separator-bubble {
    position: absolute;
    left: var(--bx);
    bottom: -10px;
    width: calc(var(--bsize) * 2);
    height: calc(var(--bsize) * 2);
    border-radius: 50%;
    background: var(--bubble-blue-alpha);
    box-shadow: inset -1px -1px 0 rgba(255,255,255,0.4);
    animation: separatorBubble var(--bdur) var(--bdelay) ease-in-out infinite;
}

@keyframes separatorBubble {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    50% {
        transform: translateY(-35px) translateX(3px);
        opacity: 0.5;
    }
    90% {
        opacity: 0.2;
    }
    100% {
        transform: translateY(-70px) translateX(-2px);
        opacity: 0;
    }
}

/* -- Content Tiles ---------------------------------------- */
.tile {
    min-height: 80vh;
    scroll-snap-align: start;
    padding: 3rem 1rem;
    background: linear-gradient(180deg, var(--sandstone-cream) 0%, var(--warm-parchment) 100%);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.tile.visible {
    opacity: 1;
    transform: translateY(0);
}

.tile-grid {
    display: grid;
    grid-template-columns: 1fr min(480px, 90vw) 1fr;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 70vh;
    align-content: start;
    gap: 0;
}

/* -- Tile Margins (Marginalia) ----------------------------- */
.tile-margin {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

.marginalia {
    opacity: 0;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.marginalia-left {
    transform: translateX(-20px);
}

.marginalia-right {
    transform: translateX(20px);
}

.tile.visible .marginalia-left {
    opacity: 0.7;
    transform: translateX(0);
    transition-delay: 0.2s;
}

.tile.visible .marginalia-right {
    opacity: 0.7;
    transform: translateX(0);
    transition-delay: 0.35s;
}

.sprite {
    display: block;
    image-rendering: pixelated;
}

/* Mobile: collapse marginalia to inline */
@media (max-width: 640px) {
    .tile-grid {
        grid-template-columns: 1fr;
    }

    .tile-margin {
        display: none;
    }

    .tile-content::before {
        content: '';
        display: block;
        width: 64px;
        height: 64px;
        margin: 0 auto 1rem;
        background: var(--river-clay);
        opacity: 0.15;
        image-rendering: pixelated;
    }
}

/* -- Tile Content ----------------------------------------- */
.tile-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.tile-header {
    padding-bottom: 1.5rem;
}

.tile-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: 0.02em;
    color: var(--bark-brown);
    line-height: 1.15;
}

.tile-title-decoration {
    height: 8px;
    margin-top: 0.75rem;
    background: repeating-linear-gradient(
        90deg,
        var(--bubble-blue) 0px,
        var(--bubble-blue) 4px,
        transparent 4px,
        transparent 6px
    );
    background-size: 6px 4px;
    background-repeat: repeat-x;
    background-position: left center;
    image-rendering: pixelated;
    opacity: 0.5;
    border-radius: 2px;
}

.tile-meta {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--rain-slate);
    margin-top: 0.5rem;
    padding: 0.25em 0.5em;
    background: var(--sand-translucent);
    border-radius: 2px;
    width: fit-content;
}

/* -- Tile Body -------------------------------------------- */
.tile-body {
    flex: 1;
    padding: 1rem 0;
}

.tile-body p {
    margin-bottom: 1.2em;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tile.visible .tile-body p {
    opacity: 1;
    transform: translateY(0);
}

.tile.visible .tile-body p:nth-child(1) { transition-delay: 0.3s; }
.tile.visible .tile-body p:nth-child(2) { transition-delay: 0.45s; }
.tile.visible .tile-body p:nth-child(3) { transition-delay: 0.6s; }
.tile.visible .tile-body p:nth-child(4) { transition-delay: 0.75s; }

.tile-body em {
    font-style: italic;
    color: var(--river-clay);
}

/* Wiki inline reference */
.wiki-ref {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--river-clay);
    cursor: pointer;
    padding: 0.1em 0.3em;
    background: var(--sand-translucent);
    border-radius: 2px;
    border-bottom: 1px dashed var(--river-clay);
}

.wiki-ref:hover {
    background: rgba(123, 167, 188, 0.15);
    color: var(--bubble-blue);
}

/* -- Tile Footer (Signposts) ------------------------------ */
.tile-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(184, 112, 61, 0.15);
    margin-top: auto;
}

.signpost {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: var(--sand-translucent);
    border-radius: 4px;
    transition: background 0.3s ease, transform 0.2s ease;
}

.signpost:hover {
    background: rgba(123, 167, 188, 0.15);
    transform: translateY(-2px);
}

.signpost::before,
.signpost::after {
    display: none;
}

.signpost-icon {
    flex-shrink: 0;
    image-rendering: pixelated;
    opacity: 0.7;
}

.signpost-text {
    font-family: var(--font-mono);
    font-size: 0.8em;
    color: var(--bark-brown);
    white-space: nowrap;
}

.signpost:hover .signpost-text {
    color: var(--bubble-blue);
}

/* -- Footer ----------------------------------------------- */
#wiki-footer {
    background: var(--deep-loam);
    color: var(--sandstone-cream);
    padding: 3rem 1rem;
    text-align: center;
}

.footer-inner {
    max-width: 480px;
    margin: 0 auto;
}

.footer-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.footer-tagline {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.95rem;
    opacity: 0.6;
    margin-bottom: 1.5rem;
}

.footer-ornament {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.footer-ornament svg {
    image-rendering: pixelated;
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    opacity: 0.4;
}

/* -- Selection styling ------------------------------------ */
::selection {
    background: rgba(123, 167, 188, 0.3);
    color: var(--bark-brown);
}

/* -- Scrollbar styling ------------------------------------ */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--warm-parchment);
}

::-webkit-scrollbar-thumb {
    background: var(--river-clay);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--river-clay-dark);
}

/* -- Responsive ------------------------------------------- */
@media (max-width: 900px) {
    .tile-margin {
        padding: 1rem 0.5rem;
    }

    .sprite {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 640px) {
    .tile {
        padding: 2rem 1rem;
        min-height: auto;
    }

    .tile-footer {
        flex-direction: column;
    }

    .title-scroll-hint {
        font-size: 0.65rem;
    }

    #compass-nav {
        bottom: 12px;
    }

    #scroll-progress {
        width: 2px;
    }
}