/* ============================================
   cbdc.studio — Styles
   Cinematic sci-fi meets institutional modernism
   ============================================ */

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

:root {
    --vault-black: #0a0e1a;
    --sovereign-gold: #d4a843;
    --protocol-cyan: #00c2d1;
    --ledger-white: #e8e4dc;
    --clearance-red: #c0392b;
    --console-gray: #3a3f4b;
    --mist-blue: #6b7a99;
    --deep-indigo: #141b2d;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-accent: 'Playfair Display', serif;

    --spine-width: 25vw;
    --content-max: 72vw;
    --ease-institutional: cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--vault-black);
    color: var(--ledger-white);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* --- Scan-line overlay --- */
#scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 1px,
        rgba(0, 194, 209, 0.015) 1px,
        rgba(0, 194, 209, 0.015) 2px
    );
}

/* --- Navigation --- */
#nav-trigger {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-lines {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-lines span {
    display: block;
    width: 28px;
    height: 1px;
    background-color: var(--protocol-cyan);
    transition: opacity 0.3s var(--ease-institutional);
}

#nav-trigger:hover .nav-lines span {
    background-color: var(--sovereign-gold);
}

.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 14, 26, 0.96);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--ease-institutional);
}

.nav-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.nav-list li a {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--console-gray);
    text-decoration: none;
    transition: color 0.3s var(--ease-institutional);
    letter-spacing: 0.06em;
}

.nav-list li a::before {
    content: attr(data-index) "  ";
    color: var(--console-gray);
    transition: color 0.3s var(--ease-institutional);
}

.nav-list li a:hover {
    color: var(--ledger-white);
}

.nav-list li a:hover::before {
    color: var(--protocol-cyan);
}

/* --- Data Spine --- */
.data-spine {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--spine-width);
    height: 100vh;
    z-index: 100;
    padding: 3rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    opacity: 0;
    overflow: hidden;
}

.data-spine.visible {
    opacity: 1;
}

.spine-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.spine-line {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--protocol-cyan);
    opacity: 0;
    white-space: nowrap;
    overflow: hidden;
}

.spine-line.revealed {
    opacity: 0.6;
}

.spine-line.highlight {
    opacity: 1;
}

.spine-scanline {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, var(--protocol-cyan), transparent);
    opacity: 0;
    pointer-events: none;
    transition: none;
}

.spine-scanline.active {
    opacity: 0.7;
    animation: scanlineSweep 0.4s linear forwards;
}

@keyframes scanlineSweep {
    0% { transform: translateX(-100%); opacity: 0.7; }
    100% { transform: translateX(100%); opacity: 0; }
}

.spine-separator {
    position: absolute;
    top: 0;
    right: 0;
    width: 1px;
    height: 100%;
    background-color: var(--console-gray);
    opacity: 0.3;
}

/* --- Mobile Spine Indicator --- */
.mobile-spine-indicator {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 40px;
    background-color: var(--deep-indigo);
    z-index: 100;
    align-items: center;
    padding: 0 1rem;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(58, 63, 75, 0.3);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--protocol-cyan);
    animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

.mobile-status {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    color: var(--protocol-cyan);
    opacity: 0.6;
    letter-spacing: 0.06em;
}

/* --- Main Content --- */
.main-content {
    margin-left: var(--spine-width);
    max-width: var(--content-max);
    opacity: 0;
    transition: opacity 0.8s var(--ease-institutional);
}

.main-content.visible {
    opacity: 1;
}

/* --- Briefing Screens --- */
.briefing-screen {
    min-height: 100vh;
    position: relative;
    padding: 6rem 4rem 8rem;
    display: flex;
    flex-direction: column;
}

.classification-stripe {
    position: absolute;
    top: 0;
    left: calc(-1 * var(--spine-width));
    width: calc(100% + var(--spine-width));
    height: 3px;
    background: linear-gradient(to right, transparent 0%, var(--protocol-cyan) 60%, transparent 100%);
    opacity: 0.6;
}

.section-header {
    margin-bottom: 1rem;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    color: var(--console-gray);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 4.5vw, 4.5rem);
    letter-spacing: -0.03em;
    color: var(--ledger-white);
    margin-bottom: 2rem;
}

.section-body {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* --- Consensus Rings --- */
.consensus-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 600px;
    pointer-events: none;
    z-index: 0;
}

.rings-svg {
    width: 100%;
    height: auto;
}

.ring {
    fill: none;
    stroke: var(--protocol-cyan);
    stroke-width: 1;
    stroke-dasharray: 8, 12;
    opacity: 0.03;
    animation: consensusPulse 12s ease-in-out infinite;
}

.ring-1 { animation-delay: 0s; }
.ring-2 { animation-delay: 3s; }
.ring-3 { animation-delay: 6s; }
.ring-4 { animation-delay: 9s; }
.ring-5 { animation-delay: 1.5s; }

@keyframes consensusPulse {
    0%, 100% { opacity: 0.03; }
    50% { opacity: 0.08; }
}

/* --- Currency Glyphs --- */
.currency-glyph {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 120px;
    height: 120px;
    z-index: 1;
    animation: glyphRotate 720s linear infinite;
}

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

/* --- Section 00: Hero --- */
.hero-section {
    justify-content: center;
    min-height: 80vh;
    position: relative;
    z-index: 1;
}

.site-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 7rem);
    color: var(--ledger-white);
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.site-subtitle {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--mist-blue);
    line-height: 1.5;
    position: relative;
    z-index: 2;
}

/* --- Section 01: Thesis --- */
.thesis-section {
    position: relative;
    z-index: 1;
}

.thesis-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.thesis-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--ledger-white);
    max-width: 52ch;
}

.pull-quote {
    align-self: flex-end;
    max-width: 40ch;
    border: none;
    margin: 0;
    padding: 0;
}

.pull-quote p {
    font-family: var(--font-accent);
    font-weight: 700;
    font-style: italic;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--sovereign-gold);
    line-height: 1.3;
}

/* --- Section 02: Anatomy --- */
.anatomy-section {
    position: relative;
    z-index: 1;
}

.anatomy-diagram {
    position: relative;
    z-index: 2;
    margin-top: 2rem;
    width: 100%;
    max-width: 800px;
}

.anatomy-svg {
    width: 100%;
    height: auto;
}

.anatomy-svg .node-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    fill: var(--protocol-cyan);
    letter-spacing: 0.06em;
}

.anatomy-node {
    cursor: pointer;
    transition: opacity 0.3s var(--ease-institutional);
}

.anatomy-node:hover rect,
.anatomy-node:hover circle,
.anatomy-node:hover polygon {
    stroke-width: 2.5;
}

.connection-line {
    stroke-dashoffset: 100;
}

.anatomy-tooltip {
    position: absolute;
    background-color: var(--deep-indigo);
    border: 1px solid var(--console-gray);
    color: var(--protocol-cyan);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 2px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s var(--ease-institutional);
    z-index: 10;
    white-space: nowrap;
    line-height: 1.5;
}

.anatomy-tooltip.visible {
    opacity: 1;
}

/* Slide-reveal for anatomy nodes */
.anatomy-node {
    opacity: 0;
    transform: translateX(-20px);
}

.anatomy-node.revealed {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.6s var(--ease-institutional), transform 0.6s var(--ease-institutional);
}

.connection-line {
    opacity: 0;
}

.connection-line.revealed {
    opacity: 0.5;
    transition: opacity 0.6s var(--ease-institutional) 0.3s;
}

/* --- Section 03: Tensions --- */
.tensions-section {
    position: relative;
    z-index: 1;
    padding: 0;
}

.tensions-split {
    display: flex;
    width: 100%;
    min-height: 70vh;
    position: relative;
    z-index: 2;
}

.tension-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem 3rem;
    transition: flex 0.5s var(--ease-institutional);
}

.tension-privacy {
    background-color: var(--vault-black);
}

.tension-transparency {
    background-color: var(--deep-indigo);
}

.tension-divider {
    width: 2px;
    background-color: var(--console-gray);
    opacity: 0.5;
    flex-shrink: 0;
    transition: transform 0.3s var(--ease-institutional);
}

.tension-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 3rem);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.privacy-title {
    color: var(--sovereign-gold);
}

.transparency-title {
    color: var(--protocol-cyan);
}

.tension-text {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.7;
    max-width: 40ch;
}

.privacy-text {
    color: var(--ledger-white);
}

.transparency-text {
    color: var(--ledger-white);
}

/* --- Section 04: Studio --- */
.studio-section {
    position: relative;
    z-index: 1;
}

.studio-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.studio-card {
    background-color: var(--deep-indigo);
    border: 1px solid var(--console-gray);
    padding: 2rem;
    border-radius: 2px;
    position: relative;
    overflow: hidden;
    transition: border-color 0.6s var(--ease-institutional);
}

.studio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 2px solid var(--sovereign-gold);
    border-radius: 2px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease-institutional);
}

.studio-card:hover::before {
    opacity: 1;
    animation: borderTrace 0.6s var(--ease-institutional) forwards;
}

@keyframes borderTrace {
    0% {
        clip-path: polygon(0 0, 0 0, 0 0, 0 0);
    }
    25% {
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    }
    50% {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 100% 100%);
    }
    75% {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    100% {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
}

.studio-card:hover {
    border-color: transparent;
}

.card-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 1.125rem;
    color: var(--ledger-white);
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.card-desc {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 0.875rem;
    color: var(--mist-blue);
    line-height: 1.6;
}

/* --- Dossier-reveal animation classes --- */
.briefing-screen {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s var(--ease-institutional), transform 0.6s var(--ease-institutional);
}

.briefing-screen.in-view {
    opacity: 1;
    transform: translateX(0);
}

.briefing-screen.exiting {
    opacity: 0.3;
    transform: translateX(-40px) scaleX(0.95);
    transition: opacity 0.4s var(--ease-institutional), transform 0.4s var(--ease-institutional);
}

/* --- Typewriter effect --- */
.spine-line .char {
    opacity: 0;
    transition: opacity 0.03s linear;
}

.spine-line .char.visible {
    opacity: 1;
}

/* --- Responsive / Mobile --- */
@media (max-width: 768px) {
    :root {
        --spine-width: 0;
    }

    .data-spine {
        display: none;
    }

    .mobile-spine-indicator {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        max-width: 100%;
        padding-top: 40px;
    }

    .briefing-screen {
        padding: 4rem 1.5rem 6rem;
    }

    .classification-stripe {
        left: 0;
        width: 100%;
    }

    .studio-grid {
        grid-template-columns: 1fr;
    }

    .tensions-split {
        flex-direction: column;
    }

    .tension-divider {
        width: 100%;
        height: 2px;
    }

    .tension-panel {
        padding: 2rem 1.5rem;
    }

    .currency-glyph {
        width: 80px;
        height: 80px;
        top: 1rem;
        right: 1rem;
    }

    .nav-list li a {
        font-size: 1rem;
    }

    .anatomy-diagram {
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: clamp(2rem, 10vw, 4rem);
    }

    .briefing-screen {
        padding: 3rem 1rem 4rem;
    }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .briefing-screen {
        opacity: 1;
        transform: none;
    }

    .spine-line {
        opacity: 0.6;
    }

    .main-content {
        opacity: 1;
    }

    .data-spine {
        opacity: 1;
    }
}