/* ========================================================================
   Drona Funnel — homepage
   A compact input → process → auditable-output diagram on roadmap paper.
   Scoped to .kl-df so the retired TradeWatch component cannot leak styles.
   ======================================================================== */

/* One explicit paper band keeps the roadmap grain continuous across the
   comparison and funnel. */
.kl-drona-band {
    position: relative;
    width: 100%;
    background: #eeebe3;
    box-shadow:
        inset 0 1px rgba(16, 42, 62, 0.10),
        inset 0 -1px rgba(16, 42, 62, 0.10);
    overflow: hidden;
    isolation: isolate;
    z-index: 1;
}

.kl-drona-band::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.07  0 0 0 0 0.16  0 0 0 0 0.30  0 0 0 0.045 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
    background-size: 160px 160px;
    mix-blend-mode: multiply;
    opacity: 0.5;
    pointer-events: none;
    z-index: 0;
}

.kl-df {
    --df-ink: #102a3e;
    --df-navy: #0a2f52;
    --df-cream: #f4ebd0;
    --df-paper: #eeebe3;
    --df-orange: #db4a2b;
    --df-red-deep: #bd3b21;
    --df-rule: rgba(16, 42, 62, 0.20);
    --df-rule-soft: rgba(16, 42, 62, 0.11);

    position: relative;
    width: 100%;
    box-sizing: border-box;
    color: var(--df-ink);
    background: transparent;
    padding: 0 clamp(20px, 4vw, 56px) clamp(96px, 9vw, 126px);
    overflow: hidden;
    z-index: 1;
}

.kl-df::before {
    content: none;
}

.kl-df__inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ---------- Eyebrow ---------- */
.kl-df__eyebrow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
    margin: 0 auto clamp(44px, 5vw, 60px);
    color: var(--df-red-deep);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: clamp(0.62rem, 0.8vw, 0.7rem);
    font-weight: 600;
    letter-spacing: 0.3em;
    line-height: 1.5;
    text-align: center;
    text-transform: uppercase;
}

.kl-df__eyebrow::before,
.kl-df__eyebrow::after {
    content: '';
    width: clamp(22px, 3vw, 38px);
    height: 1px;
    flex: 0 0 auto;
    background: var(--df-orange);
    opacity: 0.7;
}

/* ---------- Two-column funnel ---------- */
.kl-df__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
    align-items: stretch;
    gap: clamp(48px, 6vw, 80px);
    width: 100%;
}

/* ---------- Narrative rail ---------- */
.kl-df__stages {
    --df-rail-x: 0.55rem;
    --df-copy-offset: 2.35rem;
    position: relative;
    display: grid;
    grid-template-rows: repeat(3, minmax(0, 1fr));
    min-height: 540px;
    padding-left: var(--df-copy-offset);
}

.kl-df__rail {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 18px;
    pointer-events: none;
}

.kl-df__rail-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: var(--df-rail-x);
    width: 1px;
    transform: translateX(-50%);
    background: linear-gradient(180deg, rgba(16,42,62,0.34), rgba(16,42,62,0.10));
}

.kl-df__station {
    position: absolute;
    top: 0.37rem;
    left: calc(var(--df-rail-x) - var(--df-copy-offset));
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    background: var(--df-paper);
    border: 1px solid rgba(16, 42, 62, 0.52);
    transition: background 300ms ease, border-color 300ms ease, box-shadow 300ms ease;
}

.kl-df__station.is-active,
.kl-df__station.is-complete {
    background: var(--df-orange);
    border-color: var(--df-orange);
}

.kl-df__station.is-active {
    box-shadow: 0 0 0 5px rgba(219,74,43,0.11), 0 4px 14px rgba(219,74,43,0.30);
}

.kl-df__stage {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    padding: clamp(18px, 1.9vw, 24px) 0;
    opacity: 0.44;
    transform: translateY(6px);
    transition: opacity 420ms ease, transform 420ms ease;
}

.kl-df__stage + .kl-df__stage {
    border-top: 1px solid var(--df-rule-soft);
}

.kl-df__stage.is-complete {
    opacity: 0.82;
    transform: translateY(0);
}

.kl-df__stage.is-active {
    opacity: 1;
    transform: translateY(0);
}

.kl-df__stage-copy {
    position: relative;
    min-width: 0;
}

.kl-df__stage-num {
    margin: 0 0 0.45rem;
    color: var(--df-red-deep);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    line-height: 1.2;
    text-transform: uppercase;
}

.kl-df__stage-title {
    margin: 0 0 0.42rem;
    color: var(--df-ink);
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(1.65rem, 2.35vw, 2.1rem);
    font-style: italic;
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.15;
}

.kl-df__feeders span,
.kl-df__outputs span {
    border: 1px solid var(--df-rule);
    border-radius: 0;
    background: rgba(16, 42, 62, 0.035);
    font-family: 'Inter', system-ui, sans-serif;
}

.kl-df__stage-summary {
    max-width: 38rem;
    margin: 0;
    color: rgba(16, 42, 62, 0.72);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: clamp(0.82rem, 1vw, 0.93rem);
    line-height: 1.55;
}

/* ---------- Visual funnel ---------- */
.kl-df__visual {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 540px;
    gap: 0.7rem;
}

.kl-df__feeders {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.35rem;
}

.kl-df__feeders span {
    overflow: hidden;
    padding: 0.35rem 0.2rem;
    color: rgba(16, 42, 62, 0.68);
    font-size: 0.5rem;
    letter-spacing: 0.13em;
    line-height: 1.2;
    text-align: center;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(-8px);
}

.kl-df__funnel {
    display: block;
    width: 100%;
    height: 410px;
    min-height: 0;
    flex: none;
    overflow: visible;
}

.kl-df__funnel-base,
.kl-df__funnel-fill {
    vector-effect: non-scaling-stroke;
    stroke-width: 1;
}

.kl-df__funnel-base {
    fill: rgba(16, 42, 62, 0.035);
    stroke: rgba(16, 42, 62, 0.26);
}

.kl-df__funnel-fill--1 {
    fill: rgba(16, 42, 62, 0.22);
    stroke: rgba(16, 42, 62, 0.70);
}

.kl-df__funnel-fill--2 {
    fill: rgba(16, 42, 62, 0.14);
    stroke: rgba(16, 42, 62, 0.56);
}

.kl-df__funnel-fill--3 {
    fill: rgba(219, 74, 43, 0.22);
    stroke: rgba(219, 74, 43, 0.92);
}

.kl-df__outputs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.kl-df__outputs span {
    padding: 0.55rem 0.72rem;
    color: var(--df-ink);
    border-color: rgba(219, 74, 43, 0.72);
    background: rgba(219, 74, 43, 0.08);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    line-height: 1.3;
    opacity: 0;
    transform: translateY(10px);
}

/* ---------- Short laptops / landscape tablets ---------- */
@media (min-width: 841px) and (max-height: 820px) {
    .kl-df { padding-bottom: clamp(104px, 10vw, 128px); }
    .kl-df__eyebrow { margin-bottom: 40px; }
    .kl-df__layout { grid-template-columns: minmax(0, 1fr) 330px; gap: 44px; }
    .kl-df__stages,
    .kl-df__visual { min-height: 500px; }
    .kl-df__funnel { height: 375px; }
    .kl-df__stage { padding-block: 15px; }
}

/* ---------- Portrait tablet and mobile ---------- */
@media (max-width: 840px) {
    .kl-df {
        padding-inline: clamp(20px, 6vw, 42px);
        padding-bottom: clamp(84px, 12vw, 112px);
    }

    .kl-df__eyebrow {
        max-width: 42rem;
        margin-bottom: 42px;
        letter-spacing: 0.24em;
    }

    .kl-df__layout {
        grid-template-columns: 1fr;
        gap: clamp(40px, 7vw, 56px);
    }

    .kl-df__visual {
        order: -1;
        width: min(100%, 380px);
        min-height: 0;
        margin: 0 auto;
    }

    .kl-df__funnel {
        height: clamp(310px, 82vw, 390px);
        min-height: 0;
        flex: none;
    }

    .kl-df__stages {
        display: block;
        min-height: 0;
        padding-left: var(--df-copy-offset);
    }

    .kl-df__stage {
        min-height: 0;
        padding: 1.45rem 0;
    }
}

@media (max-width: 480px) {
    .kl-df {
        padding-inline: 18px;
        padding-bottom: 84px;
    }

    .kl-df__eyebrow {
        gap: 0.65rem;
        margin-bottom: 38px;
        font-size: 0.56rem;
        letter-spacing: 0.2em;
    }

    .kl-df__eyebrow::before,
    .kl-df__eyebrow::after { width: 16px; }

    .kl-df__visual { width: min(100%, 330px); }
    .kl-df__funnel { height: clamp(295px, 82vw, 345px); }
    .kl-df__feeders span { font-size: 0.43rem; letter-spacing: 0.08em; }
    .kl-df__outputs { gap: 0.4rem; }
    .kl-df__outputs span { width: 100%; padding: 0.48rem 0.55rem; font-size: 0.62rem; text-align: center; }

    .kl-df__stage-title { font-size: clamp(1.55rem, 8vw, 1.95rem); }
}

@media (max-width: 340px) {
    .kl-df { padding-inline: 15px; }
    .kl-df__eyebrow::before,
    .kl-df__eyebrow::after { display: none; }
    .kl-df__funnel { height: 285px; }
}

@media (prefers-reduced-motion: reduce) {
    .kl-df__stage,
    .kl-df__station {
        transition: none !important;
    }
}