/* ==========================================================
   cbdc.bar — A monetary observatory.
   Bauhaus fundamentals · luxury monochrome · sci-fi HUD.
   ========================================================== */

/* ---------- Tokens ---------- */
:root {
    --ink:        #0A0A0A;
    --ink-2:      #141414;
    --bone:       #F2ECD8;
    --gold:       #C9A24B;
    --gold-hi:    #E6C878;
    --signal:     #7CE3B0;

    --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
    --font-text:    "EB Garamond", "Inter", Georgia, serif;
    --font-mono:    "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;

    --fs-12: 12px;
    --fs-14: 14px;
    --fs-16: 16px;
    --fs-21: 21px;
    --fs-28: 28px;
    --fs-37: 37px;
    --fs-50: 50px;
    --fs-67: 67px;
    --fs-89: 89px;

    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 48px;
    --space-6: 64px;
    --space-7: 96px;
    --space-8: 128px;

    --col-max: 780px;
    --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
    background: var(--ink);
    color: var(--bone);
    font-family: var(--font-text);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    background: var(--ink);
    color: var(--bone);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    /* Subtle paper grain via radial-gradient pinpoints */
    background-image:
        radial-gradient(circle at 20% 12%, rgba(201, 162, 75, 0.04) 0, transparent 40%),
        radial-gradient(circle at 80% 90%, rgba(201, 162, 75, 0.03) 0, transparent 35%);
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

ol, ul {
    list-style: none;
}

/* ---------- Layout primitives ---------- */
.main {
    width: 100%;
    max-width: var(--col-max);
    margin: 0 auto;
    padding-inline: var(--space-3);
}

.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    margin-block-end: var(--space-3);
}

.section-headline {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-37);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--bone);
    margin-block-end: var(--space-5);
}

/* ---------- HUD side ornaments ---------- */
.hud-ornament {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 56px;
    pointer-events: none;
    z-index: 4;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hud-ornament--left  { left: 0; }
.hud-ornament--right { right: 0; }

.tick-rule {
    height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.1em;
    color: var(--gold);
    opacity: 0.55;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

.tick-rule__line {
    width: 1px;
    flex: 1;
    background: linear-gradient(
        to top,
        transparent 0,
        rgba(201, 162, 75, 0.5) 6%,
        rgba(201, 162, 75, 0.5) 94%,
        transparent 100%
    );
}

.tick-rule__label {
    text-transform: uppercase;
    white-space: nowrap;
}

.tick-rule--right { transform: rotate(0deg); }
.tick-rule--right .tick-rule__line {
    background: linear-gradient(
        to bottom,
        transparent 0,
        rgba(201, 162, 75, 0.5) 6%,
        rgba(201, 162, 75, 0.5) 94%,
        transparent 100%
    );
}

@media (max-width: 880px) {
    .hud-ornament { display: none; }
}

/* ---------- Persistent index nav ---------- */
.index-nav {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 10;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold);
    background: rgba(10, 10, 10, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: var(--space-2) var(--space-3);
    border: 1px solid rgba(201, 162, 75, 0.25);
    pointer-events: auto;
}

.index-nav__list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.index-nav__item {
    cursor: pointer;
    display: flex;
    gap: 12px;
    opacity: 0.45;
    transition: opacity 220ms var(--ease), color 220ms var(--ease);
}

.index-nav__item:hover {
    opacity: 0.9;
    color: var(--gold-hi);
}

.index-nav__item.is-active {
    opacity: 1;
    color: var(--gold-hi);
}

.index-nav__num {
    color: var(--bone);
    opacity: 0.7;
}

.index-nav__item.is-active .index-nav__num {
    color: var(--gold-hi);
    opacity: 1;
}

.index-nav__label {
    min-width: 84px;
}

@media (max-width: 720px) {
    .index-nav {
        top: 0;
        right: 0;
        left: 0;
        padding: 10px 16px;
        border-left: 0;
        border-right: 0;
        border-top: 0;
    }
    .index-nav__list {
        flex-direction: row;
        gap: var(--space-2);
        overflow-x: auto;
        white-space: nowrap;
    }
    .index-nav__label { min-width: 0; }
}

/* ---------- Site header / mark ---------- */
.site-header {
    width: 100%;
    max-width: var(--col-max);
    margin: 0 auto;
    padding: var(--space-8) var(--space-3) var(--space-7);
    display: flex;
    justify-content: center;
}

.mark {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    text-align: center;
}

.mark__svg {
    width: 220px;
    height: 220px;
    overflow: visible;
}

.mark__tick-ring {
    transform-origin: 120px 120px;
    transition: transform 600ms var(--ease);
}

.mark:hover .mark__tick-ring {
    transform: rotate(12deg);
}

/* Page-load draw-in for the mark */
.mark__disc {
    transform-origin: 120px 120px;
    transform: scale(0);
    animation: mark-disc 700ms var(--ease) 120ms forwards;
}

.mark__bar {
    transform-origin: left center;
    transform: scaleX(0);
    animation: mark-bar 600ms var(--ease) 600ms forwards;
}

.mark__crosshair {
    opacity: 0;
    animation: mark-cross 400ms var(--ease) 1100ms forwards;
}

@keyframes mark-disc {
    from { transform: scale(0); }
    to   { transform: scale(1); }
}

@keyframes mark-bar {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

@keyframes mark-cross {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.mark__wordmark {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.mark__word {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-28);
    letter-spacing: 0.02em;
    color: var(--bone);
}

.mark__coords {
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.18em;
    color: var(--gold);
    opacity: 0.8;
    text-transform: uppercase;
}

/* ---------- Thesis ---------- */
.thesis {
    padding-block: var(--space-7) var(--space-8);
    border-top: 1px solid rgba(201, 162, 75, 0.18);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--ease), transform 600ms var(--ease);
}

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

.thesis__headline {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-67);
    line-height: 1.02;
    letter-spacing: -0.025em;
    color: var(--bone);
    margin-block-end: var(--space-5);
}

.thesis__body {
    font-family: var(--font-text);
    font-size: var(--fs-21);
    line-height: 1.55;
    color: rgba(242, 236, 216, 0.88);
    max-width: 60ch;
}

@media (max-width: 720px) {
    .thesis__headline { font-size: var(--fs-50); }
    .thesis__body     { font-size: var(--fs-16); }
}

/* ---------- Readouts ---------- */
.readouts {
    padding-block: var(--space-7) var(--space-8);
    border-top: 1px solid rgba(201, 162, 75, 0.18);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.panel {
    position: relative;
    padding: var(--space-5) var(--space-4) var(--space-4);
    background: var(--ink-2);
    border: 1px solid rgba(201, 162, 75, 0.18);
    overflow: hidden;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--ease), transform 600ms var(--ease), border-color 220ms var(--ease);
}

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

.panel:hover {
    border-color: rgba(201, 162, 75, 0.55);
}

/* HUD bracket corners */
.panel__bracket {
    position: absolute;
    width: 18px;
    height: 18px;
    border: 1.5px solid var(--gold);
    transition: border-color 180ms var(--ease);
}

.panel__bracket--tl { top: 8px; left: 8px;  border-right: 0; border-bottom: 0; }
.panel__bracket--tr { top: 8px; right: 8px; border-left: 0;  border-bottom: 0; }
.panel__bracket--bl { bottom: 8px; left: 8px;  border-right: 0; border-top: 0; }
.panel__bracket--br { bottom: 8px; right: 8px; border-left: 0;  border-top: 0; }

.panel:hover .panel__bracket {
    border-color: var(--gold-hi);
}

.panel__eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    margin-block-end: var(--space-3);
}

.panel__heading {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-28);
    line-height: 1.1;
    letter-spacing: -0.015em;
    color: var(--bone);
    margin-block-end: var(--space-3);
}

.panel__body {
    font-family: var(--font-text);
    font-size: var(--fs-16);
    line-height: 1.6;
    color: rgba(242, 236, 216, 0.82);
    margin-block-end: var(--space-4);
    max-width: 58ch;
}

.panel__coords {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(201, 162, 75, 0.6);
    display: block;
}

/* ---------- Ledger ---------- */
.ledger {
    padding-block: var(--space-7) var(--space-8);
    border-top: 1px solid rgba(201, 162, 75, 0.18);
}

.ledger__list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ledger__item {
    position: relative;
    display: grid;
    grid-template-columns: 64px 1fr;
    align-items: baseline;
    gap: var(--space-3);
    padding-block: var(--space-4);
    border-top: 1px solid rgba(242, 236, 216, 0.06);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--ease), transform 600ms var(--ease);
    cursor: pointer;
}

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

.ledger__item:last-child {
    border-bottom: 1px solid rgba(242, 236, 216, 0.06);
}

.ledger__num {
    font-family: var(--font-mono);
    font-size: var(--fs-14);
    letter-spacing: 0.2em;
    color: var(--gold);
    opacity: 0.7;
}

.ledger__text {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: var(--fs-21);
    line-height: 1.35;
    letter-spacing: -0.005em;
    color: var(--bone);
}

.ledger__underline {
    position: absolute;
    left: 88px;
    right: 0;
    bottom: var(--space-3);
    height: 4px;
    width: calc(100% - 88px);
    overflow: visible;
    pointer-events: none;
}

.ledger__underline path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    transition: stroke-dashoffset 320ms var(--ease);
}

.ledger__item:hover .ledger__underline path {
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 320ms var(--ease);
}

@media (max-width: 720px) {
    .ledger__item {
        grid-template-columns: 40px 1fr;
        gap: var(--space-2);
    }
    .ledger__text { font-size: var(--fs-16); }
    .ledger__underline { left: 56px; width: calc(100% - 56px); }
}

/* ---------- Threshold ---------- */
.threshold {
    padding-block: var(--space-7) var(--space-8);
    border-top: 1px solid rgba(201, 162, 75, 0.18);
    text-align: left;
}

.threshold__body {
    font-family: var(--font-text);
    font-size: var(--fs-21);
    line-height: 1.55;
    color: rgba(242, 236, 216, 0.85);
    max-width: 56ch;
    margin-block-end: var(--space-5);
}

.threshold__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: 18px 28px;
    border: 1.5px solid var(--gold);
    background: transparent;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--fs-14);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--bone);
    position: relative;
    transition: border-color 220ms var(--ease), color 220ms var(--ease), background 220ms var(--ease);
    cursor: pointer;
}

.threshold__cta:hover {
    border-color: var(--gold-hi);
    color: var(--gold-hi);
    background: rgba(201, 162, 75, 0.04);
}

.threshold__cta-cross {
    position: relative;
    width: 14px;
    height: 14px;
    flex: none;
    display: inline-block;
}

.threshold__cta-cross-h,
.threshold__cta-cross-v {
    position: absolute;
    background: var(--gold);
    transition: background 220ms var(--ease);
}

.threshold__cta-cross-h { top: 6px;  left: 0;  width: 14px; height: 1.5px; }
.threshold__cta-cross-v { top: 0;    left: 6px; width: 1.5px; height: 14px; }

.threshold__cta:hover .threshold__cta-cross-h,
.threshold__cta:hover .threshold__cta-cross-v {
    background: var(--gold-hi);
}

.threshold__cta-arrow {
    color: var(--gold);
    font-size: 18px;
    transition: transform 220ms var(--ease), color 220ms var(--ease);
}

.threshold__cta:hover .threshold__cta-arrow {
    color: var(--gold-hi);
    transform: translateX(4px);
}

.threshold__signal {
    margin-block-start: var(--space-4);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(242, 236, 216, 0.55);
}

.threshold__signal-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--signal);
    border-radius: 50%;
    box-shadow: 0 0 0 0 rgba(124, 227, 176, 0.55);
    animation: signal-pulse 2.4s var(--ease) infinite;
}

@keyframes signal-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(124, 227, 176, 0.55); }
    50%      { box-shadow: 0 0 0 8px rgba(124, 227, 176, 0); }
}

/* ---------- Colophon ---------- */
.colophon {
    width: 100%;
    max-width: var(--col-max);
    margin: 0 auto;
    padding: var(--space-6) var(--space-3) var(--space-7);
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(242, 236, 216, 0.55);
}

.colophon__rule {
    height: 1px;
    background: var(--gold);
    opacity: 0.45;
    margin-block-end: var(--space-5);
}

.colophon__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    margin-block-end: var(--space-4);
}

.colophon__cell { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.colophon__link {
    color: var(--gold);
    border-bottom: 1px solid transparent;
    transition: border-color 220ms var(--ease), color 220ms var(--ease);
}

.colophon__link:hover {
    color: var(--gold-hi);
    border-color: var(--gold-hi);
}

.colophon__coords {
    color: rgba(201, 162, 75, 0.55);
    font-size: 10px;
    letter-spacing: 0.22em;
}

@media (min-width: 720px) {
    .colophon__grid { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .mark__disc      { transform: scale(1); }
    .mark__bar       { transform: scaleX(1); }
    .mark__crosshair { opacity: 1; }
}