/* ===========================================================
   sim-ai.org  --  a meditation on simulated minds
   Zen / Aurora / Candle-atmospheric
   =========================================================== */

:root {
    --bg-night:        #0E0B16;
    --bg-surface:      #1E1A27;
    --aurora-primary:  #6B5B7B;
    --aurora-secondary:#C4A882;
    --accent-glow:     #4A8B7F;
    --text-primary:    #E8E0D4;
    --text-secondary:  #9B8FAA;
    --candle-flame:    #D4A054;
    --ink-muted:       #8B7D6B;

    --font-display: "Libre Baskerville", Georgia, serif;
    --font-body:    "Karla", "Inter", system-ui, sans-serif;
    --font-mono:    "IBM Plex Mono", "Space Mono", ui-monospace, monospace;

    --hair-color: rgba(196, 168, 130, 0.3);
    --chamber-pad: clamp(2rem, 6vw, 6rem);
}

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

html, body {
    background: var(--bg-night);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.75;
    min-height: 100%;
    overflow-x: hidden;
    cursor: default;
}

html {
    scroll-behavior: smooth;
}

body {
    position: relative;
    min-height: 100vh;
}

/* -----------------------------------------------------------
   Atmosphere layers
   ----------------------------------------------------------- */

.aurora-field {
    position: fixed;
    inset: -20%;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 30% 70%, rgba(107, 91, 123, 0.35), rgba(196, 168, 130, 0.08) 40%, transparent 70%),
        radial-gradient(ellipse at 70% 30%, rgba(74, 139, 127, 0.22), transparent 60%),
        radial-gradient(ellipse at 50% 50%, rgba(196, 168, 130, 0.10), transparent 75%);
    mix-blend-mode: screen;
    filter: blur(30px);
    animation: auroraDrift 30s ease-in-out infinite alternate;
}

@keyframes auroraDrift {
    0%   { background-position: 0% 0%, 100% 100%, 50% 50%; transform: translate3d(0, 0, 0) scale(1); }
    50%  { background-position: 40% 20%, 60% 70%, 20% 80%; transform: translate3d(-2%, 1%, 0) scale(1.04); }
    100% { background-position: 70% 50%, 30% 40%, 80% 20%; transform: translate3d(2%, -1%, 0) scale(1.02); }
}

.gravel-overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image:
        repeating-radial-gradient(circle at 15% 25%, rgba(196, 168, 130, 0.05) 0 1px, transparent 1px 13px),
        repeating-radial-gradient(circle at 65% 75%, rgba(196, 168, 130, 0.04) 0 1px, transparent 1px 17px),
        repeating-radial-gradient(circle at 85% 15%, rgba(196, 168, 130, 0.035) 0 1px, transparent 1px 21px);
    opacity: 0.9;
}

.noise-veil {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background:
        radial-gradient(circle at 20% 30%, rgba(30, 26, 39, 0.4), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(14, 11, 22, 0.5), transparent 55%);
    mix-blend-mode: multiply;
    animation: veilDrift 45s ease-in-out infinite alternate;
}

@keyframes veilDrift {
    0%   { opacity: 0.7; }
    50%  { opacity: 0.9; }
    100% { opacity: 0.75; }
}

/* -----------------------------------------------------------
   Enso breathing indicator (logo / nav trigger)
   ----------------------------------------------------------- */

.enso-trigger {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 50;
    width: 64px;
    height: 64px;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.6s ease;
}

.enso-trigger:hover {
    transform: scale(1.08);
}

.enso-svg {
    position: relative;
    z-index: 2;
    animation: breathe 6s ease-in-out infinite;
}

.enso-path {
    stroke-dasharray: 180;
    stroke-dashoffset: 0;
    animation: ensoWrite 12s ease-in-out infinite alternate;
}

@keyframes ensoWrite {
    0%   { stroke-dashoffset: 180; opacity: 0.4; }
    40%  { stroke-dashoffset: 0; opacity: 1; }
    100% { stroke-dashoffset: 0; opacity: 0.7; }
}

@keyframes breathe {
    0%, 100% { opacity: 0.75; transform: scale(1); }
    50%      { opacity: 1;    transform: scale(1.06); }
}

.enso-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(196, 168, 130, 0.25), transparent 60%);
    animation: pulse 6s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% { transform: scale(0.9); opacity: 0.5; }
    50%      { transform: scale(1.3); opacity: 0.15; }
}

.enso-trigger.is-open .enso-svg {
    transform: rotate(120deg);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* -----------------------------------------------------------
   Radial menu
   ----------------------------------------------------------- */

.radial-menu {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 49;
    width: 64px;
    height: 64px;
    pointer-events: none;
}

.radial-menu ul {
    list-style: none;
    position: absolute;
    inset: 0;
}

.radial-menu li {
    position: absolute;
    top: 50%;
    left: 50%;
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.4);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: calc(var(--i) * 60ms);
    pointer-events: none;
}

.radial-menu li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
    background: rgba(30, 26, 39, 0.6);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(196, 168, 130, 0.25);
    border-radius: 2px;
    transition: color 0.4s ease, border-color 0.4s ease, transform 0.4s ease;
}

.radial-menu li a:hover {
    color: var(--candle-flame);
    border-color: rgba(212, 160, 84, 0.6);
    transform: translateX(4px);
}

.radial-menu.is-open {
    pointer-events: auto;
}

.radial-menu.is-open li {
    opacity: 1;
    pointer-events: auto;
}

.radial-menu.is-open li:nth-child(1) { transform: translate(30px, 50px) scale(1); }
.radial-menu.is-open li:nth-child(2) { transform: translate(80px, 20px) scale(1); }
.radial-menu.is-open li:nth-child(3) { transform: translate(110px, -40px) scale(1); }
.radial-menu.is-open li:nth-child(4) { transform: translate(80px, -90px) scale(1); }
.radial-menu.is-open li:nth-child(5) { transform: translate(20px, -120px) scale(1); }

/* -----------------------------------------------------------
   Bowl sound cue
   ----------------------------------------------------------- */

.bowl-cue {
    position: fixed;
    bottom: 1.6rem;
    right: 2rem;
    z-index: 40;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(155, 143, 170, 0.55);
    transition: opacity 1.2s ease, transform 1.2s ease;
    pointer-events: none;
}

.bowl-cue.is-faded {
    opacity: 0;
    transform: translateY(6px);
}

/* -----------------------------------------------------------
   Chambers layout
   ----------------------------------------------------------- */

.chambers {
    position: relative;
    z-index: 10;
}

.chamber {
    position: relative;
    min-height: 100vh;
    padding: var(--chamber-pad);
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(12, 1fr);
    gap: 1rem;
    overflow: hidden;
}

.chamber__meta {
    grid-column: 1 / span 4;
    grid-row: 1 / span 1;
    align-self: start;
    display: flex;
    gap: 1rem;
    align-items: baseline;
}

.label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-muted);
    opacity: 0.85;
}

.label--dim {
    opacity: 0.4;
}

/* -----------------------------------------------------------
   Stroke dividers between chambers
   ----------------------------------------------------------- */

.stroke-divider {
    position: absolute;
    top: 0;
    left: 50%;
    width: 1px;
    height: 120px;
    transform: translate(-50%, -40%);
    background: linear-gradient(to bottom, transparent 0%, var(--aurora-primary) 40%, var(--aurora-secondary) 100%);
    opacity: 0.65;
    animation: breathLine 7s ease-in-out infinite alternate;
}

@keyframes breathLine {
    0%   { transform: translate(-50%, -40%) scaleY(0.5); opacity: 0.3; }
    100% { transform: translate(-50%, -40%) scaleY(1);   opacity: 0.75; }
}

/* -----------------------------------------------------------
   Hero (chamber 1)
   ----------------------------------------------------------- */

.hero-title {
    grid-column: 2 / span 8;
    grid-row: 4 / span 6;
    align-self: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 5rem);
    letter-spacing: 0.03em;
    line-height: 1.1;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    max-width: 18ch;
}

.hero-title .line {
    display: block;
    transform: translateY(14px);
    opacity: 0;
    animation: lineRise 1.4s cubic-bezier(0.2, 0.9, 0.2, 1) forwards;
}

.hero-title .line:nth-child(1) { animation-delay: 0.4s; }
.hero-title .line:nth-child(2) { animation-delay: 0.7s; }
.hero-title .line:nth-child(3) { animation-delay: 1.0s; }

.hero-title em {
    font-style: italic;
    color: var(--text-secondary);
    font-weight: 400;
}

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

/* -----------------------------------------------------------
   Chamber titles (chambers 2, 4, 5)
   ----------------------------------------------------------- */

.chamber-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 4.2rem);
    letter-spacing: 0.02em;
    line-height: 1.15;
    color: var(--text-primary);
    max-width: 16ch;
}

.chamber-title em {
    font-style: italic;
    color: var(--aurora-secondary);
    font-weight: 400;
}

.chamber--signal .chamber-title {
    grid-column: 2 / span 7;
    grid-row: 5 / span 4;
    align-self: center;
}

.chamber--lattice .chamber-title {
    grid-column: 2 / span 7;
    grid-row: 4 / span 5;
    align-self: center;
}

.chamber--breath .chamber-title {
    grid-column: 1 / -1;
    grid-row: 5 / span 3;
    text-align: center;
    justify-self: center;
    align-self: center;
    font-size: clamp(2.2rem, 5.5vw, 4.5rem);
}

.chamber-title--center {
    max-width: none;
    color: var(--text-secondary);
}

/* -----------------------------------------------------------
   Koan (chamber 3)
   ----------------------------------------------------------- */

.koan {
    grid-column: 3 / span 8;
    grid-row: 4 / span 6;
    align-self: center;
    text-align: center;
    justify-self: center;
    max-width: 26ch;
}

.koan-text {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.2vw, 2.5rem);
    font-style: italic;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.koan-text em {
    color: var(--text-primary);
}

.koan-foot {
    display: block;
    text-align: center;
}

/* -----------------------------------------------------------
   Annotations (floating blocks)
   ----------------------------------------------------------- */

.annotation {
    max-width: 280px;
    padding: 1.5rem;
    background: rgba(30, 26, 39, 0.35);
    border: 1px solid rgba(196, 168, 130, 0.12);
    backdrop-filter: blur(4px);
    border-radius: 1px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.annotation p {
    margin-bottom: 0.75rem;
}

.annotation p:last-of-type {
    margin-bottom: 0;
}

.annotation .small {
    font-size: 13px;
    color: rgba(232, 224, 212, 0.65);
}

.annotation .label {
    display: block;
    margin-bottom: 0.4rem;
}

.hair {
    border: none;
    border-top: 0.5px solid var(--hair-color);
    margin: 0.9rem 0;
    width: 70%;
}

.annotation--top-right    { grid-column: 9 / span 4; grid-row: 2 / span 4; align-self: start; }
.annotation--bottom-left  { grid-column: 1 / span 4; grid-row: 10 / span 3; align-self: end; }
.annotation--center-right { grid-column: 9 / span 4; grid-row: 5 / span 4; align-self: center; }
.annotation--top-left     { grid-column: 1 / span 4; grid-row: 2 / span 4; align-self: start; }
.annotation--right        { grid-column: 9 / span 4; grid-row: 4 / span 5; align-self: center; }
.annotation--center       { grid-column: 4 / span 6; grid-row: 8 / span 4; align-self: center; justify-self: center; text-align: center; }

.colophon {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 0.5px solid var(--hair-color);
    display: flex;
    gap: 0.8rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* -----------------------------------------------------------
   Enso watermark (chamber 2)
   ----------------------------------------------------------- */

.enso-watermark {
    grid-column: 1 / span 6;
    grid-row: 3 / span 9;
    align-self: center;
    justify-self: center;
    opacity: 0.22;
    pointer-events: none;
    mix-blend-mode: screen;
}

.enso-draw {
    transition: stroke-dashoffset 2.2s cubic-bezier(0.2, 0.9, 0.2, 1);
}

.reveal.is-visible .enso-draw {
    stroke-dashoffset: 0;
}

/* -----------------------------------------------------------
   Lattice (chamber 4)
   ----------------------------------------------------------- */

.lattice {
    grid-column: 9 / span 4;
    grid-row: 2 / span 10;
    align-self: center;
    justify-self: center;
    display: flex;
    flex-direction: column;
    gap: 18px;
    width: min(320px, 80%);
    opacity: 0.65;
}

.lattice-row {
    display: flex;
    gap: 14px;
    justify-content: space-between;
}

.lattice-row span {
    flex: 1;
    height: 48px;
    background: linear-gradient(180deg,
        rgba(232, 224, 212, 0.04) 0%,
        rgba(196, 168, 130, 0.18) 40%,
        rgba(107, 91, 123, 0.08) 100%);
    border: 0.5px solid rgba(196, 168, 130, 0.22);
    border-radius: 1px;
    transform-origin: center;
    animation: latticeBreath 9s ease-in-out infinite;
}

.lattice-row:nth-child(2) span { animation-delay: 0.4s; }
.lattice-row:nth-child(3) span { animation-delay: 0.8s; }
.lattice-row:nth-child(4) span { animation-delay: 1.2s; }

.lattice-row span:nth-child(2) { animation-delay: 0.2s; }
.lattice-row span:nth-child(3) { animation-delay: 0.5s; }
.lattice-row span:nth-child(4) { animation-delay: 0.8s; }
.lattice-row span:nth-child(5) { animation-delay: 1.1s; }
.lattice-row span:nth-child(6) { animation-delay: 1.4s; }

@keyframes latticeBreath {
    0%, 100% { opacity: 0.55; transform: scaleY(1); }
    50%      { opacity: 0.85; transform: scaleY(0.96); }
}

/* -----------------------------------------------------------
   Candles
   ----------------------------------------------------------- */

.candle {
    position: absolute;
    left: var(--cx);
    top: var(--cy);
    transform: translate(-50%, -50%);
    z-index: 5;
    pointer-events: auto;
    --lean-x: 0deg;
}

.candle-svg {
    position: relative;
    z-index: 2;
    display: block;
    filter: drop-shadow(0 0 14px rgba(212, 160, 84, 0.35));
}

.flame-wrap {
    transform-box: fill-box;
    transform-origin: center bottom;
    transform: rotate(var(--lean-x));
    transition: transform 0.6s cubic-bezier(0.2, 0.9, 0.2, 1);
    animation: flameFlicker 2.4s ease-in-out infinite alternate;
}

@keyframes flameFlicker {
    0%   { opacity: 0.78; transform: rotate(var(--lean-x)) translateY(0)    scaleY(1); }
    35%  { opacity: 1;    transform: rotate(var(--lean-x)) translateY(-1px) scaleY(1.04); }
    70%  { opacity: 0.88; transform: rotate(var(--lean-x)) translateY(1px)  scaleY(0.97); }
    100% { opacity: 0.95; transform: rotate(var(--lean-x)) translateY(0)    scaleY(1.02); }
}

.candle-glow {
    position: absolute;
    left: 50%;
    top: 20%;
    width: 420px;
    height: 420px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle,
        rgba(212, 160, 84, 0.28) 0%,
        rgba(196, 168, 130, 0.14) 25%,
        rgba(107, 91, 123, 0.06) 45%,
        transparent 70%);
    pointer-events: none;
    mix-blend-mode: screen;
    filter: blur(6px);
    animation: glowPulse 4s ease-in-out infinite alternate;
    z-index: 1;
}

@keyframes glowPulse {
    0%   { opacity: 0.75; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 1;    transform: translate(-50%, -50%) scale(1.08); }
}

.candle--large .candle-glow  { width: 520px; height: 520px; }
.candle--medium .candle-glow { width: 380px; height: 380px; }
.candle--small .candle-glow  { width: 300px; height: 300px; }

.candle.is-near .candle-glow {
    animation-duration: 2.4s;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.15);
}

/* -----------------------------------------------------------
   Blur-focus reveal pattern
   ----------------------------------------------------------- */

.reveal {
    filter: blur(20px);
    opacity: 0.3;
    transition: filter 1.6s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 1.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 1.6s cubic-bezier(0.16, 1, 0.3, 1);
    transform: translateY(12px);
    will-change: filter, opacity, transform;
}

.reveal.is-focus-1 { filter: blur(16px); opacity: 0.45; }
.reveal.is-focus-2 { filter: blur(12px); opacity: 0.55; }
.reveal.is-focus-3 { filter: blur(8px);  opacity: 0.7;  }
.reveal.is-focus-4 { filter: blur(4px);  opacity: 0.85; }
.reveal.is-focus-5 { filter: blur(1px);  opacity: 0.95; }
.reveal.is-visible {
    filter: blur(0);
    opacity: 1;
    transform: translateY(0);
}

/* Chamber 1 hero elements start closer to clarity since they are
   the first impression */
.chamber--hero .reveal {
    filter: blur(8px);
    opacity: 0.5;
}

/* -----------------------------------------------------------
   Chamber accent tints
   ----------------------------------------------------------- */

.chamber--signal   { background: radial-gradient(ellipse at 60% 40%, rgba(74, 139, 127, 0.08), transparent 60%); }
.chamber--koan     { background: radial-gradient(ellipse at 50% 50%, rgba(107, 91, 123, 0.10), transparent 60%); }
.chamber--lattice  { background: radial-gradient(ellipse at 40% 60%, rgba(196, 168, 130, 0.07), transparent 60%); }
.chamber--breath   { background: radial-gradient(ellipse at 50% 60%, rgba(212, 160, 84, 0.09), transparent 60%); }

/* -----------------------------------------------------------
   Responsive tweaks
   ----------------------------------------------------------- */

@media (max-width: 900px) {
    .chamber {
        grid-template-columns: repeat(6, 1fr);
        grid-template-rows: auto;
        gap: 1.2rem;
    }
    .chamber__meta,
    .hero-title,
    .chamber-title,
    .annotation,
    .koan,
    .enso-watermark,
    .lattice {
        grid-column: 1 / -1;
        grid-row: auto;
    }
    .hero-title { padding-top: 4rem; }
    .annotation { max-width: 100%; }
    .enso-watermark { order: -1; justify-self: center; }
    .lattice { width: min(280px, 70%); }
    .bowl-cue { right: 1rem; bottom: 1rem; }
}

@media (max-width: 560px) {
    html, body { font-size: 15px; }
    :root { --chamber-pad: 1.5rem; }
    .enso-trigger { top: 1rem; left: 1rem; }
    .radial-menu { top: 1rem; left: 1rem; }
}