/* =========================================================
   tanso.markets — flat-design magazine spread
   Palette:
     #0D0D0D flat black  (primary bg)
     #FFFFFF flat white  (primary text on dark)
     #FF1493 neon magenta (primary accent)
     #00E5FF electric cyan (secondary accent)
     #FFEA00 acid yellow (tertiary accent)
     #1A1A2E deep navy (secondary bg)
     #2D2D2D dark gray  (card bg / panel)
     #808080 mid gray   (muted text)
   Fonts:
     Playfair Display (display)
     Work Sans        (body)
     JetBrains Mono   (data)
   Rules: zero shadows, zero gradients (except trend SVG),
          zero border-radius (except circular elements),
          zero blur, zero opacity < 1.
   ========================================================= */

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

:root {
    --c-black: #0D0D0D;
    --c-white: #FFFFFF;
    --c-pink: #FF1493;
    --c-cyan: #00E5FF;
    --c-yellow: #FFEA00;
    --c-navy: #1A1A2E;
    --c-gray-d: #2D2D2D;
    --c-gray-m: #808080;

    --f-display: "Playfair Display", "Inter", serif;
    --f-body: "Work Sans", "Inter", sans-serif;
    --f-data: "JetBrains Mono", monospace;
}

html, body {
    background: var(--c-black);
    color: var(--c-white);
    font-family: var(--f-body);
    font-size: 16px;
    line-height: 1.74;
    letter-spacing: 0.005em;
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
}

/* -----------------------------------------------------------
   Layout: spreads & panels
   ----------------------------------------------------------- */
.spread {
    display: grid;
    width: 100vw;
    min-height: 100vh;
    border-bottom: 2px solid var(--c-black);
}

.spread-1 { grid-template-columns: 1fr 1fr; }
.spread-2 { grid-template-columns: 1fr 1fr; }
.spread-3 { grid-template-columns: 1fr; }
.spread-4 { grid-template-columns: 35fr 65fr; }

.panel {
    position: relative;
    padding: clamp(2rem, 5vw, 4.5rem);
    overflow: hidden;
}

.panel-full { grid-column: 1 / -1; }

/* -----------------------------------------------------------
   Typography primitives
   ----------------------------------------------------------- */
.hero-title {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    letter-spacing: 0.03em;
    line-height: 1.05;
    margin-top: clamp(1.5rem, 6vh, 5rem);
    color: var(--c-white);
}

.section-heading {
    font-family: var(--f-display);
    font-weight: 600;
    font-style: italic;
    font-size: clamp(1.3rem, 3vw, 2rem);
    letter-spacing: 0.01em;
    line-height: 1.15;
    color: var(--c-white);
    margin-bottom: 1.5rem;
}

.data-label {
    font-family: var(--f-data);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-white);
    display: inline-block;
}

.data-label-muted { color: var(--c-gray-m); }

/* -----------------------------------------------------------
   Underline-draw (IntersectionObserver toggles .is-drawn)
   ----------------------------------------------------------- */
.underline-draw {
    position: relative;
    display: inline-block;
}

.underline-draw::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 3px;
    background: var(--c-pink);
    transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.underline-draw.is-drawn::after { width: 100%; }

/* Colour cycling for every third underline via data-attribute hooks */
.underline-draw.u-cyan::after { background: var(--c-cyan); }
.underline-draw.u-yellow::after { background: var(--c-yellow); }
.underline-draw.u-pink::after { background: var(--c-pink); }

@media (max-width: 767px) {
    .underline-draw::after { transition-duration: 0.8s; }
}

/* -----------------------------------------------------------
   Spread 1 — Hero / Signal
   ----------------------------------------------------------- */
.panel-hero {
    background: var(--c-black);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 2rem;
}

.hero-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-sub {
    font-family: var(--f-body);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 400;
    color: var(--c-white);
    max-width: 32ch;
    margin-top: 0.5rem;
}

.hero-tickers {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-top: 2rem;
    border-top: 2px solid var(--c-gray-d);
    border-bottom: 2px solid var(--c-gray-d);
    padding: 1rem 0;
    max-width: 340px;
}

.ticker-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--f-data);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.ticker-sym { color: var(--c-white); }
.ticker-val { font-weight: 700; }
.ticker-up { color: var(--c-cyan); }
.ticker-down { color: var(--c-pink); }
.ticker-flat { color: var(--c-gray-m); }

.hero-foot .data-label { color: var(--c-yellow); }

/* Glitch grid (right panel) */
.panel-glitch {
    background: var(--c-navy);
    padding: 0;
}

.glitch-grid {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: minmax(60px, 1fr);
    gap: 4px;
    padding: 4px;
    background: var(--c-black);
}

.glitch-cell {
    background: var(--c-gray-d);
    animation: glitch 3s steps(1) infinite;
}

.glitch-cell.c-pink   { background: var(--c-pink); }
.glitch-cell.c-cyan   { background: var(--c-cyan); }
.glitch-cell.c-yellow { background: var(--c-yellow); }
.glitch-cell.c-navy   { background: var(--c-navy); }
.glitch-cell.c-white  { background: var(--c-white); }
.glitch-cell.c-dark   { background: var(--c-gray-d); }
.glitch-cell.c-black  { background: var(--c-black); }

@keyframes glitch {
    0%, 95%, 100% { transform: translate(0); }
    96% { transform: translate(3px, -2px); }
    97% { transform: translate(-2px, 1px); }
    98% { transform: translate(4px, 3px); }
    99% { transform: translate(-3px, -1px); }
}

/* -----------------------------------------------------------
   Spread 2 — The Flow
   ----------------------------------------------------------- */
.panel-text {
    background: var(--c-black);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    max-width: 100%;
}

.text-meta { margin-bottom: 0.5rem; }

.flow-para {
    font-family: var(--f-body);
    font-size: 1.05rem;
    font-weight: 400;
    line-height: 1.74;
    letter-spacing: 0.005em;
    color: var(--c-white);
    max-width: 48ch;
    opacity: 1;
    transform: translateY(12px);
    transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.flow-para.is-in { transform: translateY(0); }

.firstletter {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.8em;
    line-height: 1;
    color: var(--c-white);
    margin-right: 0.15em;
    display: inline-block;
    vertical-align: -0.15em;
}

.panel-particles {
    background: var(--c-navy);
    padding: 0;
}

.particle-canvas {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    display: block;
    background: var(--c-navy);
}

.particle-overlay {
    position: absolute;
    left: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
}

.particle-overlay .data-label { color: var(--c-cyan); }

/* -----------------------------------------------------------
   Spread 3 — The Index
   ----------------------------------------------------------- */
.panel-index {
    background: var(--c-black);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.index-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-bottom: 2px solid var(--c-gray-d);
    padding-bottom: 1.25rem;
}

.index-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: minmax(240px, auto);
    gap: 2px;
    background: var(--c-gray-d);
    border: 2px solid var(--c-gray-d);
}

.index-card {
    background: var(--c-black);
    padding: clamp(1.25rem, 2vw, 2rem);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card-title { margin-bottom: 0.5rem; }
.card-title .data-label { color: var(--c-gray-m); }

/* Bars */
.bar-row {
    display: grid;
    grid-template-columns: 100px 1fr 48px;
    align-items: center;
    gap: 0.75rem;
}

.bar-label {
    font-family: var(--f-data);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-white);
}

.bar-track {
    position: relative;
    height: 8px;
    background: var(--c-gray-d);
    width: 100%;
    overflow: hidden;
}

.bar-fill {
    height: 8px;
    width: var(--pct);
    background: var(--c);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.bar-fill.is-in { transform: scaleX(1); }

.bar-val {
    font-family: var(--f-data);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--c-white);
    text-align: right;
    letter-spacing: 0.05em;
}

/* Circles */
.circles-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.circle-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.circle-chart {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background: conic-gradient(var(--c) calc(var(--pct)), var(--c-gray-d) 0);
    position: relative;
}

.circle-chart::before {
    content: '';
    position: absolute;
    inset: 10px;
    background: var(--c-black);
    border-radius: 50%;
}

.circle-label {
    font-family: var(--f-data);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-white);
}

.circle-val {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--c-white);
}

/* Trend */
.index-trend {
    grid-column: 1 / -1;
}

.trend-svg {
    width: 100%;
    height: 200px;
    display: block;
    background: var(--c-black);
    border-top: 2px solid var(--c-gray-d);
    border-bottom: 2px solid var(--c-gray-d);
}

.trend-line {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 2.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.trend-line.is-in { stroke-dashoffset: 0; }

.trend-ticks {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
}

.trend-ticks .data-label { color: var(--c-gray-m); }

/* Stats */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.stat-block {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.75rem;
    background: var(--c-navy);
    border-left: 3px solid var(--c);
}

.stat-num {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    line-height: 1;
    color: var(--c);
    letter-spacing: 0.01em;
}

.stat-tag {
    font-family: var(--f-data);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-gray-m);
}

/* -----------------------------------------------------------
   Spread 4 — The Pulse
   ----------------------------------------------------------- */
.panel-pulse {
    background: var(--c-navy);
    padding: 0;
}

.pulse-stage {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    background: var(--c-black);
    overflow: hidden;
}

.pulse-block {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 70%;
    height: 70%;
    transform: translate(-50%, -50%);
}

.pulse-block-a {
    background: var(--c-pink);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    animation: pulseClipA 2.4s steps(1) infinite;
}

.pulse-block-b {
    background: var(--c-cyan);
    width: 50%;
    height: 50%;
    animation: pulseClipB 2.4s steps(1) infinite;
}

.pulse-block-c {
    background: var(--c-yellow);
    width: 30%;
    height: 30%;
    animation: pulseClipC 2.4s steps(1) infinite;
}

@keyframes pulseClipA {
    0%   { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
    20%  { clip-path: polygon(0 20%, 100% 10%, 100% 90%, 0 80%); }
    40%  { clip-path: polygon(10% 0, 90% 0, 100% 100%, 0 100%); }
    60%  { clip-path: polygon(0 0, 100% 5%, 90% 100%, 10% 95%); }
    80%  { clip-path: polygon(5% 10%, 95% 0, 100% 95%, 0 100%); }
    100% { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
}

@keyframes pulseClipB {
    0%   { transform: translate(-50%, -50%) translateX(0); }
    25%  { transform: translate(-50%, -50%) translateX(30px); }
    50%  { transform: translate(-50%, -50%) translateX(-20px); }
    75%  { transform: translate(-50%, -50%) translateX(12px); }
    100% { transform: translate(-50%, -50%) translateX(0); }
}

@keyframes pulseClipC {
    0%   { transform: translate(-50%, -50%) translateY(0); }
    25%  { transform: translate(-50%, -50%) translateY(-18px); }
    50%  { transform: translate(-50%, -50%) translateY(22px); }
    75%  { transform: translate(-50%, -50%) translateY(-8px); }
    100% { transform: translate(-50%, -50%) translateY(0); }
}

.pulse-label {
    position: absolute;
    bottom: clamp(1rem, 3vw, 2rem);
    left: clamp(1rem, 3vw, 2rem);
}

.pulse-label .data-label { color: var(--c-yellow); }

.panel-close {
    background: var(--c-black);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    justify-content: center;
}

.close-meta .data-label { color: var(--c-pink); }

.close-para {
    font-family: var(--f-body);
    font-size: 1.05rem;
    font-weight: 400;
    line-height: 1.74;
    letter-spacing: 0.005em;
    color: var(--c-white);
    max-width: 52ch;
}

.close-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 2px solid var(--c-gray-d);
    padding-top: 1rem;
    margin-top: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.close-foot .data-label:first-child { color: var(--c-gray-m); }
.close-foot .data-label:last-child  { color: var(--c-cyan); }

/* -----------------------------------------------------------
   Responsive — collapse spreads < 768px
   ----------------------------------------------------------- */
@media (max-width: 1023px) {
    .index-grid { grid-template-columns: 1fr; }
    .index-trend { grid-column: 1 / -1; }
}

@media (max-width: 767px) {
    .spread-1,
    .spread-2,
    .spread-4 {
        grid-template-columns: 1fr;
    }

    .glitch-grid {
        grid-template-columns: repeat(3, 1fr);
        min-height: 60vh;
    }

    .particle-canvas { min-height: 60vh; }
    .pulse-stage { min-height: 60vh; }

    .circles-row { grid-template-columns: repeat(2, 1fr); }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .bar-row { grid-template-columns: 80px 1fr 40px; }

    .panel { padding: clamp(1.5rem, 5vw, 2.5rem); }
}