:root {
    --bg: #0a1116;
    --bg2: #111922;
    --surface: rgba(18, 26, 33, 0.92);
    --surface2: rgba(24, 34, 44, 0.9);
    --border: rgba(151, 190, 181, 0.10);
    --border-hover: rgba(60, 185, 90, 0.28);
    --text: #e9f0ec;
    --muted: #94a59f;
    --dim: #5a716b;
    --green: #7bf0be;
    --green2: #5ce6a0;
    --red: #ff8392;
    --teal: #58d7ff;
    --blue: #6ab4ff;
    --purple: #b59cff;
    --orange: #ffbc72;
    --yellow: #ffd56b;
    --nav-h: 64px;
    --font: 'Inter', system-ui, sans-serif;
    --mono: 'JetBrains Mono', Consolas, monospace;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.35);
    --radius: 20px;
    --radius-sm: 14px;
    --nav-accent: var(--green);
}

body {
    background:
        radial-gradient(ellipse 70% 60% at 10% 50%, rgba(123, 240, 190, .06), transparent),
        radial-gradient(ellipse 50% 50% at 85% 40%, rgba(88, 215, 255, .05), transparent),
        radial-gradient(ellipse 50% 40% at 50% 90%, rgba(255, 188, 114, .04), transparent),
        linear-gradient(180deg, #081016 0%, #0b141c 50%, #081015 100%);
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(123, 240, 190, .22);
}

/* ── Nav brand dot ── */
.nav-dot {
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s infinite;
}

/* ── Layout ── */
.wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ── Hero ── */
.hero {
    position: relative;
    padding: calc(var(--nav-h) + 64px) 40px 64px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 60% at 10% 50%, rgba(123, 240, 190, .07) 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 85% 40%, rgba(88, 215, 255, .05) 0%, transparent 60%);
}

.hero-inner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(123, 240, 190, .08);
    border: 1px solid rgba(123, 240, 190, .2);
    color: var(--green);
    border-radius: 20px;
    padding: 5px 16px;
    font-size: .76rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(1.9rem, 4vw, 3.6rem);
    font-weight: 800;
    line-height: 1.06;
    letter-spacing: -.04em;
    margin-bottom: 14px;
    max-width: 860px;
}

.hero h1 span {
    background: linear-gradient(135deg, #3cb95a 0%, #30c8e8 65%, #b490ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    color: var(--muted);
    font-size: 1rem;
    max-width: 560px;
    line-height: 1.72;
    margin-bottom: 36px;
}

.hero-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.badge {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 5px 14px;
    font-size: .76rem;
    font-weight: 600;
    color: var(--teal);
}

.stats-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    max-width: 680px;
}

.stat-cell {
    background: var(--surface);
    padding: 18px 20px;
    text-align: center;
}

.stat-val {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -.03em;
    color: var(--green);
}

.stat-lbl {
    font-size: .7rem;
    color: var(--muted);
    margin-top: 4px;
}

/* ── Sections ── */
.section {
    padding: 68px 40px;
    border-top: 1px solid var(--border);
}

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: 6px;
}

.section-title {
    font-size: clamp(1.5rem, 2.8vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -.03em;
    margin-bottom: 10px;
}

.section-sub {
    color: var(--muted);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 36px;
}

/* ── Cards ── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
    transition: border-color .3s ease, transform .3s cubic-bezier(0.22, 1, 0.36, 1);
}

.card-title {
    font-size: .76rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
}

.card-note {
    font-size: .8rem;
    color: var(--dim);
    margin-bottom: 14px;
    line-height: 1.6;
}

/* ── Grid ── */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 14px;
}

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

/* ── Chart containers ── */
.chart-box {
    position: relative;
    height: 240px;
}

.chart-box-tall {
    position: relative;
    height: 300px;
}

/* ── KV rows ── */
.kv-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: .82rem;
    padding: 5px 0;
    border-bottom: 1px solid var(--border);
}

.kv-row:last-child {
    border-bottom: none;
}

.kv-key {
    color: var(--muted);
}

.kv-val {
    font-family: var(--mono);
    font-weight: 600;
}

/* ── GA Controls ── */
.ga-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 14px 18px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 20px;
}

.gen-display {
    font-family: var(--mono);
    font-size: .9rem;
    color: var(--text);
    min-width: 120px;
    text-align: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: .82rem;
    font-weight: 600;
    font-family: var(--font);
    transition: all .15s;
}

.btn-primary {
    background: var(--green);
    color: #fff;
}

.btn-primary:hover {
    background: var(--green2);
}

.btn-ghost {
    background: var(--surface);
    color: var(--muted);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    color: var(--text);
    border-color: var(--muted);
}

.btn:disabled {
    opacity: .38;
    cursor: not-allowed;
}

/* ── GA grid ── */
.ga-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

/* ── Parameter cells ── */
.param-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.param-cell {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
}

.param-name {
    font-size: .67rem;
    color: var(--dim);
    text-transform: uppercase;
    letter-spacing: .07em;
    margin-bottom: 3px;
}

.param-val {
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--mono);
    color: var(--green);
}

.param-unit {
    font-size: .8rem;
    color: var(--muted);
    margin-left: 2px;
}

.param-bar-bg {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 7px;
}

.param-bar-fill {
    height: 3px;
    background: var(--green);
    border-radius: 2px;
    transition: width .5s ease;
}

/* ── Fitness badge ── */
.fitness-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mono);
    font-size: .85rem;
    font-weight: 700;
    color: var(--green);
    background: rgba(60, 185, 90, .1);
    border: 1px solid rgba(60, 185, 90, .22);
    border-radius: 8px;
    padding: 4px 12px;
}

/* ── Trade list ── */
.trade-row {
    display: grid;
    grid-template-columns: 36px 1fr 68px 90px;
    align-items: center;
    gap: 10px;
    padding: 7px 10px;
    background: var(--bg2);
    border-radius: 8px;
    font-size: .8rem;
}

.tn {
    color: var(--dim);
    font-family: var(--mono);
    font-size: .68rem;
}

.tr {
    color: var(--muted);
}

.tp {
    color: var(--green);
    font-weight: 600;
    font-family: var(--mono);
}

.tl {
    color: var(--red);
    font-weight: 600;
    font-family: var(--mono);
}

/* ── Algo step diagram ── */
.algo-flow {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
    justify-content: center;
    padding: 22px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 14px;
}

.algo-step {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    text-align: center;
    min-width: 110px;
}

.algo-step .icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.algo-step .lbl {
    font-size: .76rem;
    font-weight: 700;
    color: var(--teal);
}

.algo-step .sub {
    font-size: .67rem;
    color: var(--muted);
    margin-top: 3px;
}

.algo-arrow {
    color: var(--dim);
    font-size: 1.3rem;
    padding: 0 8px;
}

/* ── Footer ── */
footer {
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 30px 40px;
    color: var(--dim);
    font-size: .8rem;
}

footer a {
    color: var(--teal);
    text-decoration: none;
}

/* ── Custom GA Params Panel ── */
.ga-cfg-panel {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px 28px;
    margin-top: 28px;
}

.ga-cfg-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(188px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}

.ga-cfg-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ga-cfg-label {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--teal);
}

.ga-cfg-input {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: .9rem;
    font-family: var(--mono);
    padding: 7px 12px;
    outline: none;
    transition: border-color .2s;
    width: 100%;
    box-sizing: border-box;
}

.ga-cfg-input:focus {
    border-color: var(--teal);
}

.ga-cfg-hint {
    font-size: .68rem;
    color: var(--dim);
}

.ga-cfg-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.ga-cfg-status {
    font-size: .8rem;
    color: var(--teal);
    font-family: var(--mono);
}

/* ── Responsive ── */
@media (max-width: 840px) {
    .section {
        padding: 48px 20px;
    }

    .hero {
        padding: calc(var(--nav-h) + 40px) 20px 40px;
    }

    .stats-strip {
        grid-template-columns: 1fr 1fr;
    }

    .grid-2,
    .grid-3,
    .ga-grid {
        grid-template-columns: 1fr;
    }

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

    .algo-flow {
        flex-direction: column;
        align-items: flex-start;
    }
}