:root {
    --bg: #f7f6f3;
    --bg-card: #ffffff;
    --bg-card2: #f0eeea;
    --accent: #7c3aed;
    --accent-dim: #5b21b6;
    --text: #1a1a1a;
    --text-muted: #666;
    --border: #ddd9d3;
    --dark-bg: #111111;
    --dark-bg2: #1c1c1c;
    --dark-text: #e8e8e8;
    --dark-muted: #999;
    --dark-border: #2e2e2e;
    --mono: 'Courier New', Courier, monospace;
    --sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --width: 960px;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── HEADER (dark) ── */
header {
    background: var(--dark-bg);
    border-bottom: 1px solid var(--dark-border);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.conference-tag {
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
    padding: 0.25rem 0.6rem;
}

.header-links {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
    color: var(--dark-muted);
}

.header-links a { color: var(--dark-muted); }
.header-links a:hover { color: var(--dark-text); }

/* ── HERO (dark) ── */
.hero-wrap {
    background: var(--dark-bg);
    border-bottom: 1px solid var(--dark-border);
}

.hero {
    max-width: var(--width);
    margin: 0 auto;
    padding: 5rem 1rem 4rem;
}

.hero-eyebrow {
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--bg);
    margin-bottom: 1.25rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--dark-text);
}

.hero h1 span { color: var(--accent); }

.hero-sub {
    font-size: 1.05rem;
    color: var(--dark-muted);
    max-width: 680px;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.4rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 2px;
    transition: opacity 0.15s;
    cursor: pointer;
}

.btn:hover { opacity: 0.85; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-outline { border: 1px solid var(--dark-border); color: var(--dark-text); background: transparent; }

/* ── SPEAKER BAR (dark) ── */
.speaker-bar {
    background: var(--dark-bg2);
    border-bottom: 3px solid var(--accent);
}

.speaker-bar-inner {
    max-width: var(--width);
    margin: 0 auto;
    padding: 1.4rem 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
}

.speaker-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--accent-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.speaker-info strong {
    display: block;
    font-size: 1rem;
    color: var(--dark-text);
}

.speaker-info span {
    font-size: 0.85rem;
    color: var(--dark-muted);
}

.speaker-links {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.speaker-linkedin {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-muted);
    border: 1px solid var(--dark-border);
    padding: 0.4rem 0.9rem;
    transition: border-color 0.15s, color 0.15s;
}

.speaker-linkedin:hover {
    border-color: #0a66c2;
    color: #0a66c2;
    text-decoration: none;
}

/* ── MAIN (light) ── */
main {
    max-width: var(--width);
    margin: 0 auto;
    padding: 3.5rem 1rem 5rem;
}

.section-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.section-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
}

/* ── TIMELINE ── */
.track {
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid var(--border);
}

.track-item + .track-item {
    border-top: 1px solid var(--border);
}

.track-item {
    position: relative;
}

.track-item:before {
    content: '';
    position: absolute;
    left: -2.56rem;
    top: 1.65rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent-dim);
}

.track-item.featured:before {
    background: var(--accent);
    border-color: var(--accent);
}

.track-item-inner {
    padding: 1.6rem 0;
}

.track-number {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.track-song {
    font-size: 0.82rem;
    font-style: italic;
    color: var(--accent);
    margin-bottom: 0.35rem;
}

.track-heading {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--text);
}

.track-body {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.track-body p + p { margin-top: 0.5rem; }
.track-body ul { margin-top: 0.4rem; padding-left: 1.2rem; }
.track-body li { margin-bottom: 0.3rem; }
.track-body strong { color: var(--text); }

/* ── CASE STUDY CARDS ── */
.cases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.case-card {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    padding: 0.85rem;
}

.case-card .case-name {
    font-family: var(--mono);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.15rem;
}

.case-card .case-date {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.case-card ul {
    padding-left: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.case-card li { margin-bottom: 0.2rem; }

/* ── CASE STUDY RESOURCES ── */
.track-resources {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 2px solid var(--border);
    font-size: 0.85rem;
}

.track-resources strong {
    display: block;
    margin-bottom: 0.4rem;
    margin-top: 2rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
}

.track-resources ul {
    padding-left: 1rem;
    list-style: disc;
}

.track-resources li { margin-bottom: 0.25rem; }

/* ── STAT PILLS ── */
.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.stat {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    flex: 1 1 140px;
}

.stat strong {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.3rem;
}

/* ── DEFENSE CHECKLIST ── */
.checklist {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.check {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.88rem;
}

.check-box {
    width: 16px;
    height: 16px;
    border: 1px solid var(--accent-dim);
    flex-shrink: 0;
    margin-top: 0.15rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.check-box svg { width: 10px; height: 10px; fill: var(--accent); }

/* ── TRIANGLE ── */
.triangle {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.tri-node {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    padding: 0.6rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 600;
    flex: 1 1 100px;
    text-align: center;
}

/* ── URGENCY BAR ── */
.urgency-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.urgency-block {
    background: var(--bg-card2);
    border: 1px solid var(--border);
    padding: 0.9rem 1rem;
    font-size: 0.85rem;
}

.urgency-block .urgency-label {
    font-size: 0.7rem;
    font-family: var(--mono);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.3rem;
}

/* ── SLIDES CTA ── */
.slides-cta {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2rem;
    margin-top: 3.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
}

.slides-icon {
    width: 48px;
    height: 48px;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.slides-icon svg { width: 22px; height: 22px; fill: #fff; }

.slides-text strong { display: block; font-size: 1rem; margin-bottom: 0.2rem; }
.slides-text span { font-size: 0.85rem; color: var(--text-muted); }
.slides-cta .btn-primary { margin-left: auto; }

/* ── LEARN MORE ── */
.learn-more-section {
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-border);
    margin-top: 2.5rem;
    padding: 2.5rem 2rem;
}

.learn-more-inner {
    max-width: var(--width);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
}

.learn-more-text {
    flex: 1 1 260px;
    color: var(--dark-text);
}

.learn-more-text strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    color: #fff;
}

.learn-more-text p {
    font-size: 0.88rem;
    color: var(--dark-muted);
    line-height: 1.55;
}

.learn-more-inner .btn-primary { flex-shrink: 0; }

/* ── FOOTER ── */
footer {
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-border);
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--dark-muted);
}

footer a { color: var(--dark-muted); }
footer a:hover { color: var(--dark-text); }

@media (max-width: 600px) {
    .speaker-links { margin-left: 0; }
    .slides-cta .btn-primary { margin-left: 0; }
    .urgency-split { grid-template-columns: 1fr; }
}