/* =============================================
   continu.ax — The Continuax Meridian Station
   Victorian Sci-Fi Antiquarian Observatory
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
    --color-parchment: #e8e0d4;
    --color-steel: #8a96a3;
    --color-abyss: #0a0e1a;
    --color-crimson: #c94040;
    --color-deep-navy: #141b2d;
    --color-brass: #c9a84c;
    --color-ocean: #2a4a7f;
    --color-verdigris: #5b8a72;
    --color-silver: #a8b4c0;

    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body: 'Libre Baskerville', 'Georgia', serif;
    --font-mono: 'Space Mono', 'Courier New', monospace;
    --font-ui: 'Inter', 'Helvetica Neue', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-abyss);
    color: var(--color-parchment);
    font-family: var(--font-body);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* --- Grain Overlay --- */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.06;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* --- Vignette Border --- */
.vignette-border {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9998;
    box-shadow: inset 0 0 150px 60px rgba(10, 14, 26, 0.7);
}

/* --- Utility Classes --- */
.mono-label {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-steel);
}

.section-label {
    padding: 0 5vw;
    margin-bottom: 3rem;
}

.section-rule {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--color-brass) 0%, transparent 100%);
    margin-top: 0.75rem;
}

/* --- Station Header --- */
.station-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 1rem 2.5vw;
    background: linear-gradient(180deg, var(--color-abyss) 0%, rgba(10, 14, 26, 0.95) 60%, rgba(10, 14, 26, 0) 100%);
    gap: 1.5rem;
    transition: opacity 0.4s ease;
}

.station-emblem {
    display: block;
    opacity: 0.7;
    animation: emblemSpin 120s linear infinite;
}

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

.station-header__info {
    flex: 1;
}

.station-header__label {
    display: block;
    margin-bottom: 0.125rem;
}

.station-header__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-parchment);
    line-height: 1.2;
}

.station-header__coords {
    display: block;
    margin-top: 0.125rem;
    font-size: 0.625rem;
}

.station-nav {
    display: flex;
    gap: 1.5rem;
}

.station-nav__link {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-steel);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.station-nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-brass);
    transition: width 0.3s ease;
}

.station-nav__link:hover {
    color: var(--color-brass);
}

.station-nav__link:hover::after {
    width: 100%;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 8rem 5vw 4rem;
    position: relative;
}

.hero__plate {
    border: 1px solid rgba(201, 168, 76, 0.3);
    padding: 3px;
    max-width: 720px;
    width: 100%;
}

.hero__plate-inner {
    border: 1px solid rgba(201, 168, 76, 0.15);
    padding: 3rem 3.5rem;
    position: relative;
}

.hero__plate-inner::before,
.hero__plate-inner::after {
    content: '+';
    position: absolute;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-brass);
    opacity: 0.4;
}

.hero__plate-inner::before {
    top: 0.5rem;
    left: 0.75rem;
}

.hero__plate-inner::after {
    bottom: 0.5rem;
    right: 0.75rem;
}

.hero__classification {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(138, 150, 163, 0.2);
}

.hero__heading {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5.5vw, 5.5rem);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    line-height: 1.05;
    color: var(--color-parchment);
    margin-bottom: 1.5rem;
}

.hero__subtitle {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-silver);
    max-width: 560px;
    margin-bottom: 2rem;
}

.hero__meta {
    display: flex;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid rgba(138, 150, 163, 0.2);
}

.hero__scroll-indicator {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.5; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(6px); }
}

/* --- Specimen Grid (5-column golden ratio) --- */
.catalogue {
    padding: 6rem 0;
    position: relative;
}

.specimen-grid {
    display: grid;
    grid-template-columns: 1fr 1.618fr 1fr 1.618fr 1fr;
    grid-auto-rows: minmax(200px, auto);
    gap: 1.5rem;
    padding: 0 3vw;
}

/* Irregular placement positions */
.specimen-card--pos-1 { grid-column: 1 / 3; grid-row: 1 / 3; }
.specimen-card--pos-2 { grid-column: 4 / 6; grid-row: 1 / 2; }
.specimen-card--pos-3 { grid-column: 2 / 4; grid-row: 3 / 5; }
.specimen-card--pos-4 { grid-column: 5 / 6; grid-row: 2 / 4; }
.specimen-card--pos-5 { grid-column: 1 / 2; grid-row: 3 / 5; }
.specimen-card--pos-6 { grid-column: 3 / 5; grid-row: 5 / 7; }

/* --- Specimen Card --- */
.specimen-card {
    background: linear-gradient(135deg, rgba(20, 27, 45, 0.9) 0%, rgba(10, 14, 26, 0.95) 100%);
    border: 1px solid rgba(201, 168, 76, 0.15);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.specimen-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 1px solid rgba(201, 168, 76, 0);
    margin: 3px;
    transition: border-color 0.3s ease;
    pointer-events: none;
    z-index: 2;
}

.specimen-card:hover {
    border-color: rgba(201, 168, 76, 0.4);
}

.specimen-card:hover::before {
    border-color: rgba(201, 168, 76, 0.1);
}

.specimen-card:hover .specimen-card__error-bar {
    opacity: 1;
    transform: translateY(0);
}

/* Shake animation on hover */
.specimen-card.is-shaking {
    animation: instrumentShake 0.4s ease-out;
}

@keyframes instrumentShake {
    0%, 100% { transform: rotate(-0.3deg) translateX(-1px); }
    20% { transform: rotate(0.3deg) translateX(1px); }
    40% { transform: rotate(-0.2deg) translateX(-1px); }
    60% { transform: rotate(0.2deg) translateX(0.5px); }
    80% { transform: rotate(-0.1deg) translateX(-0.5px); }
}

/* --- Specimen Card Image --- */
.specimen-card__image {
    position: relative;
    width: 100%;
    padding-top: 60%;
    overflow: hidden;
}

.specimen-card__image-inner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    filter: sepia(0.6) saturate(0.4) hue-rotate(200deg) contrast(1.1);
    transition: transform 0.6s ease;
}

.specimen-card:hover .specimen-card__image-inner {
    transform: scale(1.03);
}

/* CSS-generated specimen images (albumen print style) */
.specimen-img-nebula {
    background:
        radial-gradient(ellipse at 40% 50%, rgba(42, 74, 127, 0.6) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 40%, rgba(201, 64, 64, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(201, 168, 76, 0.15) 0%, transparent 30%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-img-cluster {
    background:
        radial-gradient(circle at 30% 35%, rgba(201, 168, 76, 0.5) 0%, transparent 3%),
        radial-gradient(circle at 50% 45%, rgba(201, 168, 76, 0.4) 0%, transparent 3%),
        radial-gradient(circle at 45% 30%, rgba(201, 168, 76, 0.45) 0%, transparent 2%),
        radial-gradient(circle at 55% 55%, rgba(201, 168, 76, 0.35) 0%, transparent 3%),
        radial-gradient(circle at 35% 55%, rgba(201, 168, 76, 0.3) 0%, transparent 2%),
        radial-gradient(circle at 60% 35%, rgba(201, 168, 76, 0.4) 0%, transparent 2%),
        radial-gradient(circle at 40% 60%, rgba(201, 168, 76, 0.35) 0%, transparent 3%),
        radial-gradient(circle at 65% 50%, rgba(201, 168, 76, 0.3) 0%, transparent 2%),
        radial-gradient(ellipse at 47% 45%, rgba(42, 74, 127, 0.2) 0%, transparent 35%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-img-pulsar {
    background:
        radial-gradient(circle at 50% 50%, rgba(201, 168, 76, 0.8) 0%, transparent 5%),
        conic-gradient(from 0deg at 50% 50%, transparent 0deg, rgba(42, 74, 127, 0.3) 10deg, transparent 20deg, transparent 170deg, rgba(42, 74, 127, 0.3) 180deg, transparent 190deg),
        radial-gradient(circle at 50% 50%, rgba(42, 74, 127, 0.1) 0%, transparent 60%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-img-void {
    background:
        radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.9) 15%, transparent 35%),
        radial-gradient(circle at 30% 30%, rgba(138, 150, 163, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 70% 60%, rgba(138, 150, 163, 0.02) 0%, transparent 15%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-img-binary {
    background:
        radial-gradient(circle at 43% 48%, rgba(201, 168, 76, 0.7) 0%, transparent 6%),
        radial-gradient(circle at 57% 52%, rgba(168, 180, 192, 0.6) 0%, transparent 6%),
        radial-gradient(ellipse at 50% 50%, rgba(91, 138, 114, 0.2) 0%, transparent 25%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-img-remnant {
    background:
        radial-gradient(circle at 50% 50%, transparent 8%, rgba(201, 64, 64, 0.15) 10%, transparent 12%),
        radial-gradient(circle at 50% 50%, transparent 18%, rgba(42, 74, 127, 0.1) 20%, transparent 22%),
        radial-gradient(circle at 50% 50%, transparent 28%, rgba(201, 168, 76, 0.08) 30%, transparent 32%),
        radial-gradient(circle at 50% 50%, rgba(201, 168, 76, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-deep-navy) 0%, var(--color-abyss) 100%);
}

.specimen-card__plate-number {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(10, 14, 26, 0.7);
    padding: 0.25rem 0.5rem;
    border: 1px solid rgba(201, 168, 76, 0.2);
}

/* --- Specimen Card Content --- */
.specimen-card__content {
    padding: 1.25rem 1.5rem;
}

.specimen-card__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-parchment);
    line-height: 1.15;
    margin-bottom: 0.75rem;
}

.specimen-card__desc {
    font-family: var(--font-body);
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-silver);
    margin-bottom: 1rem;
}

.specimen-card__data {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.data-pair {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.data-key {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-steel);
}

.data-val {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-parchment);
}

.data-val--active { color: var(--color-verdigris); }
.data-val--dormant { color: var(--color-brass); }
.data-val--unknown { color: var(--color-crimson); }

/* --- Error Bar --- */
.specimen-card__error-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-crimson);
    padding: 0.5rem 1rem;
    opacity: 0;
    transform: translateY(100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 3;
}

.specimen-card__error-bar .error-text {
    color: var(--color-parchment);
    font-size: 0.625rem;
    letter-spacing: 0.12em;
}

/* --- Observation Log --- */
.observations {
    padding: 6rem 0;
}

.observation-log {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 5vw;
}

.observation-entry {
    display: flex;
    gap: 2rem;
    padding: 2.5rem 0;
    border-bottom: 1px solid rgba(138, 150, 163, 0.1);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.observation-entry.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.observation-entry__timestamp {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 100px;
    padding-top: 0.25rem;
}

.observation-entry__heading {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--color-parchment);
    margin-bottom: 0.75rem;
}

.observation-entry__text {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--color-silver);
    margin-bottom: 1rem;
}

.observation-entry__annotation {
    padding: 0.75rem 1rem;
    border-left: 2px solid var(--color-brass);
    background: rgba(201, 168, 76, 0.03);
}

.observation-entry__annotation .mono-label {
    font-size: 0.625rem;
    color: var(--color-brass);
    line-height: 1.6;
    text-transform: none;
    letter-spacing: 0.02em;
}

/* --- Signal Display / Transmissions --- */
.transmissions {
    padding: 6rem 0;
}

.signal-display {
    max-width: 900px;
    margin: 0 auto 3rem;
    padding: 0 5vw;
}

.signal-display__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(138, 150, 163, 0.15);
}

.signal-status {
    color: var(--color-verdigris);
    animation: signalBlink 1.5s ease-in-out infinite;
}

@keyframes signalBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.signal-display__canvas {
    width: 100%;
    height: 200px;
    display: block;
    border: 1px solid rgba(138, 150, 163, 0.1);
    background: rgba(10, 14, 26, 0.8);
    margin-bottom: 1rem;
}

.signal-display__readout {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.readout-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* --- Transmission Log --- */
.transmission-log {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 5vw;
}

.transmission-entry {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(138, 150, 163, 0.06);
}

.transmission-entry__bar {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg,
        var(--color-brass) 0%,
        var(--color-ocean) 30%,
        var(--color-verdigris) 60%,
        transparent 100%
    );
    opacity: 0.4;
    position: relative;
}

.transmission-entry__bar::after {
    content: '';
    position: absolute;
    right: 0;
    top: -3px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-verdigris);
    opacity: 0.6;
}

/* --- About Section --- */
.about {
    padding: 6rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.618fr 1fr;
    gap: 4rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 5vw;
}

.about-content__title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-parchment);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.about-content__paragraph {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--color-silver);
    margin-bottom: 1.25rem;
}

.about-content__station-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
}

.station-diagram-svg {
    width: 100%;
    max-width: 360px;
    animation: diagramRotate 180s linear infinite;
}

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

/* --- Footer --- */
.station-footer {
    padding: 3rem 5vw 2rem;
    border-top: 1px solid rgba(201, 168, 76, 0.15);
}

.station-footer__content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.station-footer__left,
.station-footer__right {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.station-footer__center {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.signal-status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-verdigris);
    animation: dotBlink 2s ease-in-out infinite;
}

@keyframes dotBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

.station-footer__rule {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-brass), transparent);
    opacity: 0.2;
    margin-bottom: 1rem;
}

.station-footer__fine {
    text-align: center;
}

.station-footer__fine .mono-label {
    font-size: 0.5625rem;
    opacity: 0.5;
}

/* --- Responsive Adjustments --- */
@media (max-width: 900px) {
    .specimen-grid {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: auto;
    }

    .specimen-card--pos-1,
    .specimen-card--pos-2,
    .specimen-card--pos-3,
    .specimen-card--pos-4,
    .specimen-card--pos-5,
    .specimen-card--pos-6 {
        grid-column: auto;
        grid-row: auto;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .signal-display__readout {
        grid-template-columns: repeat(2, 1fr);
    }

    .station-header {
        flex-wrap: wrap;
    }

    .station-nav {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
}

@media (max-width: 600px) {
    .specimen-grid {
        grid-template-columns: 1fr;
    }

    .hero__plate-inner {
        padding: 2rem 1.5rem;
    }

    .observation-entry {
        flex-direction: column;
        gap: 0.75rem;
    }

    .station-footer__content {
        flex-direction: column;
        gap: 1rem;
    }

    .signal-display__readout {
        grid-template-columns: 1fr 1fr;
    }

    .hero__classification,
    .hero__meta {
        flex-direction: column;
        gap: 0.25rem;
    }
}