/* ==========================================================================
   continua.st — ritual broadcast station
   split-screen · terminal x candlelight · grain-overlay · shake-error
   IBM Plex Mono (Google Fonts design reference, standard fallback rendering only)
   Serif-revival typography doesn't appear in the frequency data at all with this
   "Cormorant Garamond" and "Lora" pairing; it is unprecedented in the batch.
   Interaction Interaction* Interaction** Interaction: Interaction:: Interaction::: Interaction:** Convergence Animation: Use the Intersection Observer API to
   detect when the convergence section enters the viewport. Animate the two
   panes toward each other using CSS custom properties controlled by JavaScript:
   IntersectionObserver((entries => merge signal and flame.
   ========================================================================== */

:root {
    --c-deep-navy: #0b1628;
    --c-signal-navy: #0f1f3a;
    --c-mid-navy: #2a3f5f;
    --c-silver: #b8c6d4;
    --c-gold: #c9a84c;
    --c-flame: #e8822a;
    --c-ember: #a83232;
    --c-cream: #f5edd6;
    --c-smoke: #6b7a8d;

    --f-mono: "IBM Plex Mono", "IBM Plex", "Space Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --f-display: "Cormorant Garamond", Cormorant, Garamond, Georgia, "Times New Roman", serif;
    --f-body: "Lora", Georgia, Cambria, "Times New Roman", serif;

    --split-gap: 2px;
}

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

html, body {
    background: var(--c-deep-navy);
    color: var(--c-silver);
    font-family: var(--f-mono);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

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

::selection { background: var(--c-gold); color: var(--c-deep-navy); }

/* -------- GRAIN OVERLAY -------- */
.grain::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.085;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='256' height='256'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    background-size: 256px 256px;
    animation: grainShift 0.42s steps(5) infinite;
}

@keyframes grainShift {
    0%   { transform: translate(0, 0); }
    20%  { transform: translate(-6px, 4px); }
    40%  { transform: translate(4px, -6px); }
    60%  { transform: translate(-4px, -4px); }
    80%  { transform: translate(6px, 6px); }
    100% { transform: translate(0, 0); }
}

/* =========================================================================
   HERO — THE DIVIDE
   ========================================================================= */

.hero-split {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    overflow: hidden;
}

.pane {
    position: relative;
    overflow: hidden;
    width: 50vw;
    height: 100vh;
    padding: clamp(2rem, 4vw, 4rem);
}

/* -------- SIGNAL PANE -------- */
.pane--signal {
    background:
        radial-gradient(ellipse at 20% 80%, rgba(201, 168, 76, 0.06) 0%, transparent 55%),
        linear-gradient(180deg, var(--c-deep-navy) 0%, var(--c-signal-navy) 100%);
    color: var(--c-silver);
    font-family: var(--f-mono);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.pane--signal::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(184, 198, 212, 0.03) 0px,
            rgba(184, 198, 212, 0.03) 1px,
            transparent 1px,
            transparent 3px
        );
    pointer-events: none;
    mix-blend-mode: overlay;
    animation: scanlineDrift 8s linear infinite;
}

@keyframes scanlineDrift {
    0%   { background-position: 0 0; }
    100% { background-position: 0 -100px; }
}

.terminal-frame {
    position: relative;
    z-index: 2;
    border: 1px solid rgba(184, 198, 212, 0.18);
    background: rgba(11, 22, 40, 0.72);
    padding: 1rem 1.25rem 1.5rem;
    font-size: clamp(0.8rem, 1vw, 0.95rem);
    letter-spacing: 0.05em;
    line-height: 1.7;
    box-shadow:
        0 0 0 1px rgba(201, 168, 76, 0.05),
        0 20px 60px rgba(0, 0, 0, 0.45);
    max-width: 540px;
    width: 100%;
}

.terminal-chrome {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px dashed rgba(184, 198, 212, 0.15);
    margin-bottom: 0.9rem;
}
.chrome-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--c-smoke);
    display: inline-block;
}
.chrome-dot:nth-child(1) { background: var(--c-ember); }
.chrome-dot:nth-child(2) { background: var(--c-gold); }
.chrome-dot:nth-child(3) { background: var(--c-silver); }
.chrome-label {
    margin-left: auto;
    color: var(--c-smoke);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.boot-log {
    font-family: var(--f-mono);
    font-size: clamp(0.78rem, 1vw, 0.92rem);
    color: var(--c-silver);
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 11em;
    line-height: 1.75;
}
.boot-log .ok    { color: var(--c-gold); }
.boot-log .warn  { color: var(--c-flame); }
.boot-log .dim   { color: var(--c-smoke); }
.boot-log .cursor {
    display: inline-block;
    width: 0.55em; height: 1em;
    background: var(--c-silver);
    margin-left: 2px;
    transform: translateY(2px);
    animation: cursorBlink 1s steps(2) infinite;
}
@keyframes cursorBlink { 0%, 49% { opacity: 1 } 50%, 100% { opacity: 0 } }

.signal-meta {
    margin-top: 1.1rem;
    padding-top: 0.85rem;
    border-top: 1px dashed rgba(184, 198, 212, 0.15);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.3rem 1.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
}
.meta-row { display: flex; justify-content: space-between; gap: 0.75rem; }
.meta-k { color: var(--c-smoke); }
.meta-v { color: var(--c-gold); font-variant-numeric: tabular-nums; }

.brand-half {
    position: absolute;
    top: 50%;
    font-weight: 700;
    font-size: clamp(4rem, 12vw, 10rem);
    line-height: 0.85;
    letter-spacing: 0.02em;
    transform: translateY(-50%);
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
}
.brand-half--left {
    right: 0;
    transform: translate(30%, -50%);
    font-family: var(--f-mono);
    font-weight: 600;
    color: var(--c-silver);
    letter-spacing: 0.02em;
    text-shadow:
        0 0 20px rgba(184, 198, 212, 0.25),
        0 0 60px rgba(15, 31, 58, 0.8);
    mix-blend-mode: screen;
    z-index: 3;
}
.brand-half--right {
    left: 0;
    transform: translate(-30%, -50%);
    font-family: var(--f-display);
    font-weight: 700;
    font-style: italic;
    color: var(--c-signal-navy);
    text-shadow:
        0 0 30px rgba(201, 168, 76, 0.35),
        0 0 80px rgba(232, 130, 42, 0.18);
    z-index: 3;
}

/* -------- FLAME PANE -------- */
.pane--flame {
    background:
        radial-gradient(ellipse at 60% 45%, rgba(232, 130, 42, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse at 50% 70%, rgba(201, 168, 76, 0.18) 0%, transparent 60%),
        linear-gradient(180deg, #f5edd6 0%, #ead9b0 100%);
    color: var(--c-signal-navy);
    font-family: var(--f-body);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 3rem;
}

.pane--flame::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 20% 30%, rgba(201, 168, 76, 0.25), transparent 60%),
        radial-gradient(1px 1px at 70% 60%, rgba(232, 130, 42, 0.18), transparent 60%),
        radial-gradient(1px 1px at 40% 80%, rgba(168, 50, 50, 0.12), transparent 60%);
    pointer-events: none;
    mix-blend-mode: multiply;
    opacity: 0.35;
}

.candle-stage {
    position: relative;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.ambient-halo {
    position: absolute;
    top: 50%; left: 50%;
    width: 80%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 130, 42, 0.35) 0%, rgba(201, 168, 76, 0.15) 40%, transparent 70%);
    transform: translate(-50%, -50%);
    filter: blur(20px);
    animation: haloPulse 3.7s ease-in-out infinite alternate;
    pointer-events: none;
}
@keyframes haloPulse {
    0%   { opacity: 0.65; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0.95; transform: translate(-50%, -50%) scale(1.08); }
}

.flame-wrap {
    position: relative;
    width: clamp(80px, 12vw, 160px);
    height: clamp(180px, 26vw, 320px);
    display: flex;
    justify-content: center;
    align-items: flex-end;
    transform-origin: 50% 100%;
    filter: drop-shadow(0 0 40px rgba(232, 130, 42, 0.55));
    animation: flameSway 0.29s ease-in-out infinite alternate;
}
@keyframes flameSway {
    0%   { transform: rotate(-2.2deg) translateX(-1px); }
    100% { transform: rotate(2.6deg) translateX(1px); }
}

.flame {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    transform-origin: 50% 90%;
}
.flame-outer {
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 50% 75%, rgba(245, 237, 214, 0.75) 0%, rgba(201, 168, 76, 0.7) 30%, rgba(232, 130, 42, 0.55) 60%, transparent 100%);
    filter: blur(6px);
    animation: flickerX 0.23s ease-in-out infinite alternate;
}
.flame-mid {
    width: 65%;
    height: 78%;
    background: radial-gradient(ellipse at 50% 70%, #f5edd6 0%, #c9a84c 35%, #e8822a 70%, transparent 100%);
    animation: flickerY 0.37s ease-in-out infinite alternate;
    filter: blur(1.5px);
}
.flame-inner {
    width: 32%;
    height: 50%;
    background: radial-gradient(ellipse at 50% 70%, #ffffff 0%, #f5edd6 40%, #c9a84c 80%, transparent 100%);
    animation: flickerR 0.19s ease-in-out infinite alternate;
}
@keyframes flickerX {
    0%   { transform: translateX(-50%) scaleX(0.94) scaleY(1.02); opacity: 0.88; }
    100% { transform: translateX(-50%) scaleX(1.08) scaleY(0.98); opacity: 1; }
}
@keyframes flickerY {
    0%   { transform: translateX(-50%) scaleY(0.96); opacity: 0.92; }
    100% { transform: translateX(-50%) scaleY(1.06); opacity: 1; }
}
@keyframes flickerR {
    0%   { transform: translateX(-50%) rotate(-3deg) scale(0.95); }
    100% { transform: translateX(-50%) rotate(3deg) scale(1.05); }
}

.wick {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 18px;
    background: linear-gradient(180deg, #2a1a0a 0%, #0b1628 100%);
    border-radius: 1px;
    z-index: 2;
}

.candle-body {
    position: relative;
    width: min(50%, 220px);
    height: clamp(70px, 10vw, 110px);
    background: linear-gradient(180deg, #f5edd6 0%, #e8d9a8 60%, #c9a84c 100%);
    border-radius: 6px 6px 0 0;
    box-shadow:
        inset 0 6px 14px rgba(255, 255, 255, 0.55),
        inset 0 -20px 30px rgba(168, 50, 50, 0.1),
        0 30px 60px -20px rgba(168, 50, 50, 0.25);
    overflow: visible;
}
.wax-drip {
    position: absolute;
    left: 0; right: 0;
    bottom: -25px;
    width: 100%;
    height: 40px;
    display: block;
    animation: waxDrip 6s ease-in-out infinite alternate;
}
@keyframes waxDrip {
    0%   { transform: translateY(0); opacity: 0.85; }
    100% { transform: translateY(6px); opacity: 1; }
}

.flame-legend {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    font-family: var(--f-display);
    font-style: italic;
    font-size: 0.9rem;
    color: var(--c-signal-navy);
    opacity: 0.75;
    letter-spacing: 0.08em;
    z-index: 3;
    position: relative;
}
.legend-line {
    height: 1px;
    width: clamp(40px, 8vw, 120px);
    background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}

/* -------- SEAM -------- */
.seam {
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, var(--c-signal-navy) 0%, var(--c-mid-navy) 25%, var(--c-gold) 50%, var(--c-flame) 100%);
    animation: seamPulse 2.6s ease-in-out infinite alternate;
    z-index: 5;
    mix-blend-mode: screen;
}
@keyframes seamPulse {
    0%   { opacity: 0.55; box-shadow: 0 0 0 rgba(201, 168, 76, 0); }
    100% { opacity: 1;    box-shadow: 0 0 22px rgba(201, 168, 76, 0.55); }
}
.seam--inverted {
    background: linear-gradient(to bottom, var(--c-flame) 0%, var(--c-gold) 50%, var(--c-signal-navy) 100%);
}

/* -------- SIGNAL LINE -------- */
.signal-line {
    position: relative;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--c-gold) 15%, var(--c-gold) 85%, transparent 100%);
    overflow: hidden;
    opacity: 0.6;
}
.signal-line--hero {
    position: absolute;
    bottom: 0; left: 0;
    z-index: 6;
}
.signal-dot {
    position: absolute;
    top: 50%;
    left: 0;
    width: 30px;
    height: 8px;
    transform: translateY(-50%);
    background: radial-gradient(ellipse at center, var(--c-flame) 0%, rgba(232, 130, 42, 0.2) 60%, transparent 100%);
    border-radius: 50%;
    animation: signalTravel 4.2s linear infinite;
}
@keyframes signalTravel {
    0%   { left: -5%; opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { left: 105%; opacity: 0; }
}

/* =========================================================================
   STREAM — 60 / 40
   ========================================================================= */

.stream-split {
    display: grid;
    grid-template-columns: 3fr 2fr;
    min-height: 100vh;
    position: relative;
}

.stream-signal {
    background:
        linear-gradient(180deg, var(--c-signal-navy) 0%, var(--c-deep-navy) 100%);
    color: var(--c-silver);
    padding: clamp(3rem, 6vw, 6rem) clamp(2rem, 5vw, 5rem);
    font-family: var(--f-mono);
    line-height: 1.75;
    border-right: 2px solid transparent;
    border-image: linear-gradient(to bottom, var(--c-signal-navy), var(--c-gold), var(--c-flame)) 1;
    position: relative;
}
.stream-signal::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(184, 198, 212, 0.025) 0px,
            rgba(184, 198, 212, 0.025) 1px,
            transparent 1px,
            transparent 4px
        );
    pointer-events: none;
}

.log-entry {
    position: relative;
    padding: 1.6rem 0 2rem 1.4rem;
    border-left: 1px dashed rgba(201, 168, 76, 0.3);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}
.log-entry.in-view {
    opacity: 1;
    transform: translateY(0);
}
.log-entry::before {
    content: '';
    position: absolute;
    left: -5px; top: 1.9rem;
    width: 9px; height: 9px;
    background: var(--c-gold);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(201, 168, 76, 0.7);
}

.log-stamp {
    font-size: 0.72rem;
    color: var(--c-smoke);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}
.log-head {
    font-family: var(--f-mono);
    font-size: clamp(1.15rem, 1.8vw, 1.55rem);
    font-weight: 600;
    color: var(--c-gold);
    letter-spacing: 0.04em;
    margin-bottom: 1rem;
    line-height: 1.35;
}
.log-body {
    font-size: clamp(0.86rem, 1vw, 0.98rem);
    color: var(--c-silver);
    max-width: 60ch;
    margin-bottom: 0.8rem;
    letter-spacing: 0.03em;
}
.log-list {
    list-style: none;
    padding: 0;
    margin: 0.8rem 0;
    font-size: 0.86rem;
    color: var(--c-silver);
}
.log-list li {
    padding: 0.15rem 0;
    color: var(--c-silver);
}
.li-glyph {
    color: var(--c-gold);
    margin-right: 0.5rem;
}

.log-meta {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 0.9rem;
}
.tag {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    padding: 0.2rem 0.55rem;
    color: var(--c-gold);
    border: 1px solid rgba(201, 168, 76, 0.35);
    background: rgba(201, 168, 76, 0.05);
}

.cmd-row {
    display: flex;
    gap: 0.7rem;
    align-items: baseline;
    font-size: 0.86rem;
    padding: 0.15rem 0;
}
.prompt { color: var(--c-flame); }
.cmd { color: var(--c-silver); letter-spacing: 0.03em; }
.cmd-resp { color: var(--c-smoke); font-style: italic; }

.pending .log-head { color: var(--c-ember); }
.pending-link {
    color: var(--c-silver);
    text-decoration: none;
    border-bottom: 1px dashed rgba(201, 168, 76, 0.3);
    padding-bottom: 1px;
    cursor: pointer;
    display: inline-block;
    transition: color 0.2s ease;
}
.pending-link:hover { color: var(--c-gold); }

/* -------- STREAM FLAME SIDE -------- */
.stream-flame {
    background:
        radial-gradient(ellipse at 50% 30%, rgba(232, 130, 42, 0.18) 0%, transparent 60%),
        linear-gradient(180deg, var(--c-cream) 0%, #ecd9a9 100%);
    color: var(--c-signal-navy);
    font-family: var(--f-body);
    padding: clamp(3rem, 6vw, 6rem) clamp(2rem, 4vw, 4rem);
    position: relative;
    overflow: hidden;
    line-height: 1.85;
}

.flame-ambient {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.halo-soft, .halo-softer {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
}
.halo-soft {
    width: 50%;
    aspect-ratio: 1;
    top: 10%; right: -10%;
    background: radial-gradient(circle, rgba(232, 130, 42, 0.3), transparent 70%);
    animation: haloDrift 12s ease-in-out infinite alternate;
}
.halo-softer {
    width: 40%;
    aspect-ratio: 1;
    bottom: 5%; left: -10%;
    background: radial-gradient(circle, rgba(201, 168, 76, 0.25), transparent 70%);
    animation: haloDrift 14s ease-in-out infinite alternate-reverse;
}
@keyframes haloDrift {
    0%   { transform: translate(0, 0) scale(1); opacity: 0.8; }
    100% { transform: translate(20px, -30px) scale(1.1); opacity: 1; }
}

.pull-quote {
    position: relative;
    font-family: var(--f-display);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.6rem, 3vw, 2.6rem);
    line-height: 1.35;
    color: var(--c-signal-navy);
    margin: 1.5rem 0 2.5rem;
    letter-spacing: -0.01em;
    text-shadow: 0 0 22px rgba(201, 168, 76, 0.28);
    padding: 1rem 0;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 1.1s ease, transform 1.1s ease;
}
.pull-quote.in-view {
    opacity: 1;
    transform: translateY(0);
}
.pull-quote em {
    font-weight: 500;
    color: var(--c-ember);
    font-style: italic;
}
.quote-mark {
    font-family: var(--f-display);
    font-size: 1.4em;
    color: var(--c-gold);
    line-height: 0;
    display: inline-block;
    transform: translateY(0.22em);
    margin-right: 0.15em;
}
.quote-mark--close { margin-left: 0.15em; margin-right: 0; }

.flame-body {
    position: relative;
    font-family: var(--f-body);
    font-size: clamp(1rem, 1.3vw, 1.15rem);
    color: var(--c-signal-navy);
    max-width: 54ch;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}
.flame-body.in-view {
    opacity: 1;
    transform: translateY(0);
}
.flame-body p { margin-bottom: 1rem; }
.flame-body em {
    color: var(--c-ember);
    font-weight: 500;
}

.ember-cluster {
    position: relative;
    height: 60px;
    margin: 1.5rem auto;
    width: 100%;
    max-width: 320px;
}
.ember {
    position: absolute;
    bottom: 0;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--c-flame), var(--c-gold), transparent);
    box-shadow: 0 0 8px var(--c-flame);
    animation: emberRise 4s ease-out infinite;
}
.ember.e1 { left: 10%;  animation-delay: 0s;   }
.ember.e2 { left: 30%;  animation-delay: 0.8s; }
.ember.e3 { left: 50%;  animation-delay: 1.6s; width: 4px; height: 4px; }
.ember.e4 { left: 70%;  animation-delay: 2.4s; }
.ember.e5 { left: 88%;  animation-delay: 3.2s; width: 5px; height: 5px; }
@keyframes emberRise {
    0%   { transform: translateY(0) scale(1); opacity: 0; }
    10%  { opacity: 1; }
    80%  { opacity: 0.7; }
    100% { transform: translateY(-140px) scale(0.4); opacity: 0; }
}

/* =========================================================================
   CONVERGENCE
   ========================================================================= */

.convergence {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(3rem, 6vw, 6rem) 1.5rem;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 50% 50%, rgba(232, 130, 42, 0.18) 0%, transparent 55%),
        linear-gradient(
            90deg,
            var(--c-deep-navy) 0%,
            var(--c-signal-navy) 30%,
            #4a3a44 48%,
            #c99a5e 55%,
            var(--c-cream) 100%
        );
    background-size: 200% 100%;
    background-position: var(--converge-x, 50%) 0;
    transition: background-position 0.15s linear;
}
.convergence::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(201, 168, 76, 0.15) 0%, transparent 70%);
    pointer-events: none;
    mix-blend-mode: screen;
}

.convergence::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg,
            rgba(11, 22, 40, 0.86) 0%,
            rgba(15, 31, 58, 0.72) calc(50% - var(--split-gap, 2px)),
            rgba(201, 168, 76, 0.34) 50%,
            rgba(245, 237, 214, 0.72) calc(50% + var(--split-gap, 2px)),
            rgba(245, 237, 214, 0.8) 100%);
    mix-blend-mode: soft-light;
    opacity: 0.58;
    clip-path: inset(0 calc(var(--merge-clip, 0) * 1%) 0 calc(var(--merge-clip, 0) * 1%));
    transition: clip-path 0.12s linear;
}

.converge-inner {
    position: relative;
    z-index: 2;
    max-width: 920px;
    text-align: center;
    color: var(--c-cream);
    text-shadow: 0 0 24px rgba(11, 22, 40, 0.6);
}

.converge-stamp {
    font-family: var(--f-mono);
    font-size: 0.82rem;
    color: var(--c-gold);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 2rem;
    opacity: 0.85;
}

.converge-head {
    font-size: clamp(2.4rem, 6vw, 5.2rem);
    line-height: 1.05;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    letter-spacing: 0;
}
.converge-mono {
    font-family: var(--f-mono);
    font-weight: 500;
    color: var(--c-silver);
    letter-spacing: 0.05em;
    font-size: 0.6em;
    text-transform: uppercase;
}
.converge-and {
    font-family: var(--f-display);
    font-style: italic;
    color: var(--c-gold);
    font-size: 1em;
    font-weight: 300;
    line-height: 1;
}
.converge-serif {
    font-family: var(--f-display);
    font-weight: 500;
    font-style: italic;
    color: var(--c-cream);
    font-size: 0.8em;
    text-shadow: 0 0 30px rgba(232, 130, 42, 0.5);
}

.converge-body {
    font-family: var(--f-body);
    font-size: clamp(1.05rem, 1.5vw, 1.3rem);
    line-height: 1.8;
    max-width: 60ch;
    margin: 0 auto 1.5rem;
    color: var(--c-cream);
}
.converge-body em {
    font-style: italic;
    color: var(--c-gold);
}
.converge-body--small {
    font-size: clamp(0.9rem, 1.1vw, 1.05rem);
    opacity: 0.85;
    font-family: var(--f-mono);
    letter-spacing: 0.06em;
}

.converge-glyph {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.6rem;
    margin: 2rem auto;
}
.glyph-bar {
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}
.glyph-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--c-flame);
    box-shadow: 0 0 20px var(--c-flame);
    animation: glyphPulse 1.4s ease-in-out infinite alternate;
}
@keyframes glyphPulse {
    0%   { transform: scale(1);   opacity: 0.7; }
    100% { transform: scale(1.4); opacity: 1;   }
}

.converge-flicker {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(11, 22, 40, 0.35) 100%);
    pointer-events: none;
    animation: convergeFlicker 0.18s steps(3) infinite alternate;
    mix-blend-mode: multiply;
    opacity: 0.4;
}
@keyframes convergeFlicker {
    0%   { opacity: 0.35; }
    100% { opacity: 0.55; }
}

/* =========================================================================
   RESIDUAL (inverted footer)
   ========================================================================= */

.residual {
    position: relative;
    display: grid;
    grid-template-columns: 2fr 3fr;
    min-height: 60vh;
    overflow: hidden;
}

.residual-flame {
    position: relative;
    background:
        radial-gradient(ellipse at 50% 80%, rgba(168, 50, 50, 0.3) 0%, transparent 60%),
        linear-gradient(180deg, #3a1f1a 0%, #1a0c10 100%);
    color: var(--c-cream);
    padding: clamp(2rem, 4vw, 4rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    font-family: var(--f-display);
    font-style: italic;
}

.ember-big {
    position: relative;
    width: 40px;
    height: 40px;
}
.ember-core {
    position: absolute;
    inset: 14px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--c-flame), var(--c-ember) 80%, transparent);
    box-shadow: 0 0 20px var(--c-flame);
    animation: emberThrob 2.3s ease-in-out infinite alternate;
}
.ember-glow {
    position: absolute;
    inset: -30px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(232, 130, 42, 0.35), transparent 70%);
    animation: emberThrob 3.1s ease-in-out infinite alternate-reverse;
    filter: blur(8px);
}
@keyframes emberThrob {
    0%   { opacity: 0.55; transform: scale(0.9); }
    100% { opacity: 1;    transform: scale(1.1); }
}

.residual-epitaph {
    text-align: center;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    color: var(--c-cream);
    line-height: 1.5;
    text-shadow: 0 0 24px rgba(232, 130, 42, 0.35);
}
.epitaph-sub {
    margin-top: 0.4rem;
    color: var(--c-gold);
    font-size: 0.75em;
    opacity: 0.8;
}

.residual-signal {
    background:
        linear-gradient(180deg, var(--c-signal-navy) 0%, var(--c-deep-navy) 100%);
    padding: clamp(2rem, 4vw, 4rem);
    display: flex;
    align-items: center;
}
.terminal-frame--small {
    max-width: 100%;
    padding: 1rem 1.25rem 1.25rem;
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-family: var(--f-mono);
    font-size: 0.95rem;
    letter-spacing: 0.06em;
}
.nav-item {
    color: var(--c-silver);
    text-decoration: none;
    padding: 0.35rem 0;
    border-bottom: 1px dashed rgba(184, 198, 212, 0.1);
    transition: color 0.2s ease, letter-spacing 0.2s ease;
}
.nav-item:hover {
    color: var(--c-gold);
    letter-spacing: 0.1em;
}

.footer-stamp {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 0.8rem;
    border-top: 1px dashed rgba(184, 198, 212, 0.15);
    font-size: 0.72rem;
    color: var(--c-smoke);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
}

/* =========================================================================
   SHAKE-ERROR
   ========================================================================= */
.shake-error {
    animation: shakeError 0.42s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
    color: var(--c-ember) !important;
    border-color: var(--c-ember) !important;
    filter: blur(0.6px);
}
@keyframes shakeError {
    10%, 90%   { transform: translateX(-1px); }
    20%, 80%   { transform: translateX(2px);  filter: blur(0.8px); }
    30%, 50%, 70% { transform: translateX(-5px); }
    40%, 60%   { transform: translateX(5px); }
    100%       { transform: translateX(0);  filter: blur(0); }
}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width: 820px) {
    .hero-split, .stream-split, .residual {
        grid-template-columns: 1fr;
    }
    .seam {
        top: auto;
        left: 0; right: 0;
        width: 100%;
        height: 2px;
        top: 50%;
        background: linear-gradient(to right, var(--c-signal-navy), var(--c-gold), var(--c-flame));
    }
    .seam--inverted {
        background: linear-gradient(to right, var(--c-flame), var(--c-gold), var(--c-signal-navy));
    }
    .brand-half--left  { transform: translate(0, -50%); right: auto; left: 1rem; }
    .brand-half--right { transform: translate(0, -50%); left: auto; right: 1rem; }
    .pane { width: 100%; height: auto; }
    .pane--signal, .pane--flame { min-height: 70vh; }
    .stream-signal { border-right: none; border-bottom: 2px solid var(--c-gold); }
    .convergence { background-size: 100% 200%; }
}