/* ============================================================
   annual.quest - Glitch Opulence Design System
   ============================================================ */

/* CSS Custom Properties */
:root {
    --void-navy: #0B1929;
    --abyss: #060D18;
    --bridge-deck: #111F33;
    --pale-steel: #C0CADB;
    --chrome-white: #E8EDF4;
    --signal-cyan: #4FA8C9;
    --glitch-magenta: #D64A8C;
    --imperial-gold: #B8943E;
    --brushed-titanium: #8A9BAE;
    --reactor-amber: #D4A03C;
    --cold-blue: #2A4A7F;
    --black: #000000;

    --spine-width: 2px;
    --panel-max-width: 560px;
    --bracket-arm: 40px;
    --bracket-stroke: 2px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Libre Baskerville', Georgia, serif;
    background-color: var(--abyss);
    color: var(--pale-steel);
    overflow-x: hidden;
    position: relative;
}

/* ============================================================
   Scanline Overlay
   ============================================================ */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.03) 0px,
        rgba(0, 0, 0, 0.03) 1px,
        rgba(0, 0, 0, 0.06) 1px,
        rgba(0, 0, 0, 0.06) 2px
    );
}

/* ============================================================
   Scroll Progress Bar
   ============================================================ */
.scroll-progress {
    position: fixed;
    top: 0;
    right: 0;
    width: 3px;
    height: 0%;
    background-color: var(--pale-steel);
    opacity: 0.6;
    z-index: 999;
    transition: height 0.1s linear;
}

/* ============================================================
   The Spine (Timeline)
   ============================================================ */
.spine {
    position: fixed;
    left: 50%;
    top: 0;
    width: var(--spine-width);
    height: 100%;
    transform: translateX(-50%);
    z-index: 10;
    background: linear-gradient(180deg, var(--brushed-titanium) 0%, var(--signal-cyan) 50%, var(--brushed-titanium) 100%);
    background-size: 100% 200%;
    animation: spineShimmer 3s ease-in-out infinite, spinePulse 2s ease-in-out infinite;
    opacity: 0.8;
}

@keyframes spineShimmer {
    0%, 100% { background-position: 0% 0%; }
    50% { background-position: 0% 100%; }
}

@keyframes spinePulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.9; }
}

/* ============================================================
   Stratum (Sections)
   ============================================================ */
.stratum {
    position: relative;
    min-height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
}

.stratum-odd {
    background-color: var(--void-navy);
}

.stratum-even {
    background-color: var(--abyss);
}

.stratum-deep {
    background-color: var(--abyss);
}

.stratum-deep.stratum-odd {
    background-color: var(--abyss);
}

/* Masthead Section */
#epoch-present {
    min-height: 100vh;
    flex-direction: column;
}

.stratum-masthead {
    text-align: center;
    z-index: 20;
}

.masthead-title {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 7rem);
    color: var(--chrome-white);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-shadow:
        0 0 20px rgba(42, 74, 127, 0.6),
        0 0 40px rgba(42, 74, 127, 0.3);
    /* Holographic glow: #2A4A7F cold blue at varying opacities */
    position: relative;
    display: inline-block;
}

/* ============================================================
   Glitch Text Effect
   ============================================================ */
.glitch-text {
    position: relative;
}

.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.glitch-text::before {
    color: var(--glitch-magenta);
    mix-blend-mode: screen;
    animation: glitchRGB 4s ease-in-out infinite;
    clip-path: inset(0 0 0 0);
}

.glitch-text::after {
    color: var(--signal-cyan);
    mix-blend-mode: screen;
    animation: glitchRGB2 4s ease-in-out infinite;
    clip-path: inset(0 0 0 0);
}

@keyframes glitchRGB {
    0%, 95%, 100% { transform: translate(-2px, 0); opacity: 0.7; }
    96% { transform: translate(-4px, 1px); opacity: 0.9; clip-path: inset(20% 0 60% 0); }
    97% { transform: translate(-2px, -1px); opacity: 0.7; clip-path: inset(50% 0 20% 0); }
    98% { transform: translate(-3px, 0); opacity: 0.8; clip-path: inset(10% 0 70% 0); }
}

@keyframes glitchRGB2 {
    0%, 95%, 100% { transform: translate(2px, 0); opacity: 0.7; }
    96% { transform: translate(4px, -1px); opacity: 0.9; clip-path: inset(60% 0 10% 0); }
    97% { transform: translate(2px, 1px); opacity: 0.7; clip-path: inset(30% 0 40% 0); }
    98% { transform: translate(3px, 0); opacity: 0.8; clip-path: inset(80% 0 5% 0); }
}

/* Micro-glitch burst every ~6s */
@keyframes microGlitch {
    0%, 82%, 100% {
        transform: none;
        clip-path: inset(0 0 0 0);
    }
    83% {
        transform: skewX(2deg);
        clip-path: inset(15% 0 65% 0);
    }
    84% {
        transform: skewX(-1deg);
        clip-path: inset(55% 0 25% 0);
    }
    85% {
        transform: skewX(0deg);
        clip-path: inset(0 0 0 0);
    }
}

.stratum-heading {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 5.5vw, 5rem);
    color: var(--chrome-white);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-shadow:
        0 0 20px rgba(42, 74, 127, 0.6),
        0 0 40px rgba(42, 74, 127, 0.3);
    margin-bottom: 0.5rem;
    animation: microGlitch 7s step-start infinite;
}

/* ============================================================
   Coordinate Strings (Typewriter)
   ============================================================ */
.coordinate-string {
    font-family: 'Inconsolata', monospace;
    font-weight: 300;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--signal-cyan);
    margin-bottom: 1.5rem;
    min-height: 1.2em;
}

.typewriter-cursor {
    animation: blink 1s step-end infinite;
    color: var(--signal-cyan);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ============================================================
   Diamond Nodes
   ============================================================ */
.diamond-node {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 32px;
    height: 32px;
    transform: translate(-50%, -50%) rotate(45deg) scale(0);
    background: linear-gradient(135deg, #2A4A7F 0%, var(--pale-steel) 100%);
    box-shadow: 0 0 12px rgba(42, 74, 127, 0.4);
    z-index: 15;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.diamond-node.visible {
    transform: translate(-50%, -50%) rotate(45deg) scale(1);
}

#epoch-present .diamond-node {
    top: auto;
    bottom: 8%;
}

.diamond-terminal {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--void-navy) 0%, var(--reactor-amber) 100%);
    box-shadow: 0 0 20px rgba(212, 160, 60, 0.5), 0 0 40px rgba(212, 160, 60, 0.2);
}

/* ============================================================
   Connectors
   ============================================================ */
.connector {
    position: absolute;
    top: 50%;
    height: 2px;
    background-color: var(--brushed-titanium);
    z-index: 12;
    transform-origin: left center;
    width: 0;
    transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.connector-left {
    left: 50%;
    transform: translateX(0) translateY(-50%) scaleX(-1);
    transform-origin: left center;
}

.connector-right {
    left: 50%;
    transform: translateY(-50%);
}

.connector.drawn {
    width: calc(50vw - var(--panel-max-width) / 2 - 50px);
}

@media (max-width: 900px) {
    .connector.drawn {
        width: 40px;
    }
}

/* ============================================================
   Panels
   ============================================================ */
.stratum-panel {
    max-width: var(--panel-max-width);
    width: 100%;
    z-index: 20;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.stratum-panel.revealed {
    opacity: 1;
    transform: translateY(0);
}

.panel-left {
    margin-right: auto;
    margin-left: calc(50% - var(--panel-max-width) - 60px);
}

.panel-right {
    margin-left: auto;
    margin-right: calc(50% - var(--panel-max-width) - 60px);
}

.panel-center {
    margin: 0 auto;
}

@media (max-width: 1200px) {
    .panel-left {
        margin-left: 2rem;
        margin-right: calc(50% + 30px);
    }
    .panel-right {
        margin-right: 2rem;
        margin-left: calc(50% + 30px);
    }
}

@media (max-width: 900px) {
    .panel-left,
    .panel-right {
        margin-left: 2rem;
        margin-right: 2rem;
        max-width: 100%;
    }
    .spine {
        left: 2rem;
    }
    .diamond-node {
        left: 2rem;
    }
    .connector {
        display: none;
    }
}

.panel-inner {
    background-color: var(--bridge-deck);
    padding: 2.5rem;
    position: relative;
}

/* ============================================================
   Bracket Frames
   ============================================================ */
.bracket-frame {
    position: relative;
    padding: 4px;
}

.bracket {
    position: absolute;
    width: var(--bracket-arm);
    height: var(--bracket-arm);
    z-index: 25;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.bracket-tl {
    top: 0;
    left: 0;
    border-top: var(--bracket-stroke) solid var(--brushed-titanium);
    border-left: var(--bracket-stroke) solid var(--brushed-titanium);
    border-top-width: 0;
    border-left-width: 0;
    transition: border-width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.bracket-tr {
    top: 0;
    right: 0;
    border-top: var(--bracket-stroke) solid var(--brushed-titanium);
    border-right: var(--bracket-stroke) solid var(--brushed-titanium);
    border-top-width: 0;
    border-right-width: 0;
    transition: border-width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.bracket-bl {
    bottom: 0;
    left: 0;
    border-bottom: var(--bracket-stroke) solid var(--brushed-titanium);
    border-left: var(--bracket-stroke) solid var(--brushed-titanium);
    border-bottom-width: 0;
    border-left-width: 0;
    transition: border-width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
}

.bracket-br {
    bottom: 0;
    right: 0;
    border-bottom: var(--bracket-stroke) solid var(--brushed-titanium);
    border-right: var(--bracket-stroke) solid var(--brushed-titanium);
    border-bottom-width: 0;
    border-right-width: 0;
    transition: border-width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
}

.bracket-frame.drawn .bracket-tl {
    border-top-width: var(--bracket-stroke);
    border-left-width: var(--bracket-stroke);
}

.bracket-frame.drawn .bracket-tr {
    border-top-width: var(--bracket-stroke);
    border-right-width: var(--bracket-stroke);
}

.bracket-frame.drawn .bracket-bl {
    border-bottom-width: var(--bracket-stroke);
    border-left-width: var(--bracket-stroke);
}

.bracket-frame.drawn .bracket-br {
    border-bottom-width: var(--bracket-stroke);
    border-right-width: var(--bracket-stroke);
}

/* Hover: brackets glow Signal Cyan */
.bracket-frame:hover .bracket {
    border-color: var(--signal-cyan);
    box-shadow: 0 0 8px rgba(79, 168, 201, 0.4);
}

/* Gold bracket frame variant */
.gold-frame .bracket {
    border-color: var(--imperial-gold) !important;
}

.gold-frame.drawn .bracket-tl {
    border-top-color: var(--imperial-gold);
    border-left-color: var(--imperial-gold);
}
.gold-frame.drawn .bracket-tr {
    border-top-color: var(--imperial-gold);
    border-right-color: var(--imperial-gold);
}
.gold-frame.drawn .bracket-bl {
    border-bottom-color: var(--imperial-gold);
    border-left-color: var(--imperial-gold);
}
.gold-frame.drawn .bracket-br {
    border-bottom-color: var(--imperial-gold);
    border-right-color: var(--imperial-gold);
}

.gold-frame:hover .bracket {
    border-color: var(--reactor-amber) !important;
    box-shadow: 0 0 12px rgba(212, 160, 60, 0.4);
}

/* ============================================================
   Body Text
   ============================================================ */
.body-text {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.15vw, 1.25rem);
    line-height: 1.85;
    color: var(--pale-steel);
    margin-bottom: 1.25rem;
}

.body-text:last-of-type {
    margin-bottom: 0;
}

.origin-text {
    color: var(--chrome-white);
    text-align: center;
}

/* Glitch letters in Archive II */
.glitch-letter {
    color: var(--glitch-magenta);
    display: inline;
    animation: letterGlitch 6s step-start infinite;
}

@keyframes letterGlitch {
    0%, 85%, 100% { color: var(--glitch-magenta); transform: none; }
    86% { color: var(--signal-cyan); }
    88% { color: var(--glitch-magenta); }
    90% { color: var(--pale-steel); }
}

/* ============================================================
   System Readout (Archive I)
   ============================================================ */
.system-readout {
    font-family: 'Inconsolata', monospace;
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--signal-cyan);
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(6, 13, 24, 0.6);
    border-left: 2px solid var(--signal-cyan);
}

.readout-line {
    display: block;
    margin-bottom: 0.3rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.system-readout.active .readout-line {
    opacity: 1;
    transform: translateX(0);
}

.system-readout.active .readout-line:nth-child(1) { transition-delay: 0.1s; }
.system-readout.active .readout-line:nth-child(2) { transition-delay: 0.25s; }
.system-readout.active .readout-line:nth-child(3) { transition-delay: 0.4s; }
.system-readout.active .readout-line:nth-child(4) { transition-delay: 0.55s; }

/* ============================================================
   Ornamental Borders
   ============================================================ */
.ornamental-border {
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--brushed-titanium) 15%,
        var(--brushed-titanium) 30%,
        transparent 32%,
        transparent 35%,
        var(--brushed-titanium) 37%,
        transparent 39%,
        transparent 45%,
        var(--brushed-titanium) 50%,
        transparent 55%,
        transparent 61%,
        var(--brushed-titanium) 63%,
        transparent 65%,
        transparent 68%,
        var(--brushed-titanium) 70%,
        var(--brushed-titanium) 85%,
        transparent 100%
    );
    opacity: 0.4;
    margin: 1.5rem 0;
    transform: scaleX(0);
    transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: center;
}

.ornamental-border.gold {
    background: linear-gradient(90deg,
        transparent 0%,
        var(--imperial-gold) 10%,
        transparent 15%,
        var(--imperial-gold) 20%,
        var(--imperial-gold) 35%,
        transparent 38%,
        transparent 42%,
        var(--imperial-gold) 45%,
        transparent 48%,
        transparent 52%,
        var(--imperial-gold) 55%,
        transparent 58%,
        transparent 62%,
        var(--imperial-gold) 65%,
        var(--imperial-gold) 80%,
        transparent 85%,
        var(--imperial-gold) 90%,
        transparent 100%
    );
}

.ornamental-border.drawn {
    transform: scaleX(1);
}

/* ============================================================
   Corruption Zones
   ============================================================ */
.corruption-zone {
    min-height: 40vh;
    background-color: var(--abyss);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.corruption-alpha {
    min-height: 40vh;
}

.corruption-beta {
    min-height: 50vh;
}

.corruption-beta .scanlines-boost {
    opacity: 0.08;
}

/* Spine Fracture in Corruption Zones */
.spine-fracture {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: var(--spine-width);
    transform: translateX(-50%);
    z-index: 11;
    background: repeating-linear-gradient(
        180deg,
        var(--brushed-titanium) 0px,
        var(--brushed-titanium) 8px,
        transparent 8px,
        transparent 20px
    );
    opacity: 0.4;
    animation: spineFracture 2s steps(3) infinite;
}

.spine-fracture.severe {
    opacity: 0.2;
    animation: spineFractureSevere 1.5s steps(5) infinite;
}

@keyframes spineFracture {
    0% { transform: translateX(-50%); }
    33% { transform: translateX(calc(-50% + 3px)); }
    66% { transform: translateX(calc(-50% - 2px)); }
    100% { transform: translateX(-50%); }
}

@keyframes spineFractureSevere {
    0% { transform: translateX(-50%); }
    20% { transform: translateX(calc(-50% + 5px)); }
    40% { transform: translateX(calc(-50% - 4px)); }
    60% { transform: translateX(calc(-50% + 2px)); }
    80% { transform: translateX(calc(-50% - 6px)); }
    100% { transform: translateX(-50%); }
}

/* Data Stream Columns */
.data-stream-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 5;
}

.data-stream {
    position: absolute;
    top: 0;
    width: 1ch;
    font-family: 'Inconsolata', monospace;
    font-size: 10px;
    color: var(--signal-cyan);
    opacity: 0.2;
    white-space: pre;
    line-height: 1.4;
    will-change: transform;
    animation: dataFall var(--fall-speed, 12s) linear infinite;
}

@keyframes dataFall {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

/* Corruption Content */
.corruption-content {
    position: relative;
    z-index: 20;
    text-align: center;
}

.corruption-heading {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 6vw, 5rem);
    color: var(--chrome-white);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    position: relative;
}

/* Heavy glitch for corruption zone headings */
.glitch-heavy {
    animation: glitchHeavy 3s step-start infinite;
}

@keyframes glitchHeavy {
    0%, 90%, 100% {
        clip-path: inset(0 0 0 0);
        transform: none;
    }
    91% {
        clip-path: inset(10% 0 70% 0);
        transform: skewX(4deg) translateX(5px);
    }
    92% {
        clip-path: inset(50% 0 20% 0);
        transform: skewX(-3deg) translateX(-3px);
    }
    93% {
        clip-path: inset(20% 0 50% 0);
        transform: skewX(2deg) translateX(2px);
    }
    94% {
        clip-path: inset(60% 0 10% 0);
        transform: skewX(-5deg) translateX(-4px);
    }
    95% {
        clip-path: inset(5% 0 80% 0);
        transform: skewX(1deg);
    }
}

.glitch-heavy::before,
.glitch-heavy::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.glitch-heavy::before {
    color: var(--glitch-magenta);
    mix-blend-mode: screen;
    animation: glitchHeavyR 2s ease-in-out infinite;
}

.glitch-heavy::after {
    color: var(--signal-cyan);
    mix-blend-mode: screen;
    animation: glitchHeavyB 2.5s ease-in-out infinite;
}

@keyframes glitchHeavyR {
    0%, 80%, 100% { transform: translate(-3px, 0); opacity: 0.7; }
    85% { transform: translate(-6px, 2px); opacity: 0.9; clip-path: inset(30% 0 40% 0); }
    90% { transform: translate(-3px, -1px); opacity: 0.7; clip-path: inset(60% 0 20% 0); }
}

@keyframes glitchHeavyB {
    0%, 80%, 100% { transform: translate(3px, 0); opacity: 0.7; }
    82% { transform: translate(6px, -2px); opacity: 0.9; clip-path: inset(40% 0 30% 0); }
    88% { transform: translate(3px, 1px); opacity: 0.7; clip-path: inset(20% 0 60% 0); }
}

/* Severe glitch for corruption zone beta */
.glitch-severe {
    animation: glitchSevere 2s step-start infinite;
}

@keyframes glitchSevere {
    0%, 80%, 100% {
        clip-path: inset(0 0 0 0);
        transform: none;
        opacity: 1;
    }
    81% {
        clip-path: inset(5% 0 85% 0);
        transform: skewX(8deg) translateX(8px);
        opacity: 0.9;
    }
    83% {
        clip-path: inset(40% 0 30% 0);
        transform: skewX(-6deg) translateX(-5px);
        opacity: 0.7;
    }
    85% {
        clip-path: inset(70% 0 5% 0);
        transform: skewX(4deg) translateX(3px);
        opacity: 0.5;
    }
    87% {
        clip-path: inset(20% 0 60% 0);
        transform: skewX(-10deg) translateX(-10px);
        opacity: 0.3;
    }
    89% {
        clip-path: inset(0 0 0 0);
        transform: none;
        opacity: 0.8;
    }
}

.glitch-severe::before,
.glitch-severe::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.glitch-severe::before {
    color: var(--glitch-magenta);
    mix-blend-mode: screen;
    animation: glitchHeavyR 1.5s ease-in-out infinite;
}

.glitch-severe::after {
    color: var(--signal-cyan);
    mix-blend-mode: screen;
    animation: glitchHeavyB 1.8s ease-in-out infinite;
}

/* Corruption fragments */
.corruption-fragments {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2rem;
    margin-top: 2rem;
}

.fragment {
    font-family: 'Inconsolata', monospace;
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--glitch-magenta);
    opacity: 0;
    animation: fragmentDrift 4s ease-in-out infinite;
}

.fragment:nth-child(odd) {
    color: var(--signal-cyan);
}

.fragment:nth-child(1) { animation-delay: 0s; }
.fragment:nth-child(2) { animation-delay: 0.6s; }
.fragment:nth-child(3) { animation-delay: 1.2s; }
.fragment:nth-child(4) { animation-delay: 1.8s; }
.fragment:nth-child(5) { animation-delay: 2.4s; }
.fragment:nth-child(6) { animation-delay: 3.0s; }
.fragment:nth-child(7) { animation-delay: 3.6s; }

@keyframes fragmentDrift {
    0% { opacity: 0; transform: translateY(10px); }
    20% { opacity: 0.8; transform: translateY(0); }
    80% { opacity: 0.8; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-10px); }
}

/* ============================================================
   Crosshair Markers
   ============================================================ */
.crosshair-marker {
    display: flex;
    justify-content: center;
    margin: 2rem 0 1rem;
}

.crosshair-marker svg {
    animation: crosshairRotate 20s linear infinite;
    opacity: 0.6;
}

@keyframes crosshairRotate {
    0% { transform: rotate(0deg); opacity: 0.4; }
    50% { opacity: 0.8; }
    100% { transform: rotate(360deg); opacity: 0.4; }
}

/* ============================================================
   Radar Sweep (Origin Section)
   ============================================================ */
.radar-sweep {
    width: 120px;
    height: 120px;
    position: relative;
    margin: 2rem auto;
    border-radius: 50%;
    overflow: hidden;
}

.radar-circle {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid var(--signal-cyan);
    opacity: 0.3;
    position: absolute;
    top: 0;
    left: 0;
}

.radar-circle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60%;
    height: 60%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid var(--signal-cyan);
    opacity: 0.4;
}

.radar-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30%;
    height: 30%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid var(--signal-cyan);
    opacity: 0.5;
}

.radar-line {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 50%;
    transform-origin: bottom left;
    animation: radarSweep 4s linear infinite;
    background: conic-gradient(
        from 0deg at 0% 100%,
        transparent 0deg,
        rgba(79, 168, 201, 0.3) 30deg,
        transparent 60deg
    );
}

@keyframes radarSweep {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================================
   Origin Section Special Styles
   ============================================================ */
.stratum-origin {
    min-height: 100vh;
    animation: originPulse 6s ease-in-out infinite;
}

@keyframes originPulse {
    0%, 100% { background-color: var(--abyss); }
    50% { background-color: var(--void-navy); }
}

/* ============================================================
   Reveal Animations (scroll-triggered)
   ============================================================ */
.stratum-panel .panel-inner > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stratum-panel.revealed .panel-inner > * {
    opacity: 1;
    transform: translateY(0);
}

.stratum-panel.revealed .panel-inner > *:nth-child(1) { transition-delay: 0s; }
.stratum-panel.revealed .panel-inner > *:nth-child(2) { transition-delay: 0.12s; }
.stratum-panel.revealed .panel-inner > *:nth-child(3) { transition-delay: 0.24s; }
.stratum-panel.revealed .panel-inner > *:nth-child(4) { transition-delay: 0.36s; }
.stratum-panel.revealed .panel-inner > *:nth-child(5) { transition-delay: 0.48s; }
.stratum-panel.revealed .panel-inner > *:nth-child(6) { transition-delay: 0.60s; }
.stratum-panel.revealed .panel-inner > *:nth-child(7) { transition-delay: 0.72s; }
.stratum-panel.revealed .panel-inner > *:nth-child(8) { transition-delay: 0.84s; }
.stratum-panel.revealed .panel-inner > *:nth-child(9) { transition-delay: 0.96s; }

/* ============================================================
   Masthead reveal
   ============================================================ */
.stratum-masthead {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease, transform 1s ease;
}

.stratum-masthead.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   Responsive Adjustments
   ============================================================ */
@media (max-width: 600px) {
    .stratum {
        padding: 3rem 1rem;
    }

    .panel-inner {
        padding: 1.5rem;
    }

    .corruption-fragments {
        gap: 0.5rem 1rem;
    }

    .masthead-title {
        letter-spacing: 0.06em;
    }

    .stratum-heading {
        letter-spacing: 0.06em;
    }
}