:root {
    --dark:      #2c2c25;
    --muted:     #6a6a6a;
    --gold:      #d4af37;
    --gold-dark: #b8942d;
    --soft:      #f6f6f6;
    --white:     #ffffff;
    --bg-light:  #faf9f5;
}

h1, h2, h3 { color: var(--dark); font-weight: 800; }
p          { color: var(--muted); line-height: 1.7; }

.video-hero > .video-hero__background,
.video-hero > .video-hero__overlay,
.video-hero > .video-hero__content {
    max-width: none; width: 100%; margin-left: 0; margin-right: 0;
}

/* ============================================================
   SECTION 2 — PAPERS GRID
   1 col → 2 col at 768px → 3 col at 1024px
   ============================================================ */
.white-papers {
    padding: 40px 16px;
    background: var(--white);
}

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

.papers-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.paper-card {
    background: var(--white);
    border-radius: 14px;
    border: 1px solid rgba(212,175,55,0.25);
    overflow: hidden;
    box-shadow: 0 8px 22px rgba(0,0,0,0.06);
    transition: transform .3s ease, box-shadow .3s ease;
}

.paper-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.10);
}

.paper-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.paper-content { padding: 22px; }

.paper-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.paper-description { margin-bottom: 18px; font-size: 0.98rem; }

.paper-actions { display: flex; flex-direction: column; gap: 10px; }

.btn {
    padding: 14px 24px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1rem;
    text-align: center;
    display: block;
    transition: background .25s ease;
    text-decoration: none;
}

.btn:hover { transform: translateY(-2px); }

.abstract-btn  { background: var(--gold); color: var(--white); }
.abstract-btn:hover { background: var(--gold-dark); }

.download-btn  { background: #f1f1f1; color: var(--dark); }
.download-btn:hover { background: #888888; color: #fff; }

/* Divider */
.wp-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    max-width: 500px;
    margin: 0 auto;
    padding: 0 16px;
}

.wp-divider span:not(.wp-divider-diamond) {
    flex: 1; height: 1px;
    background: linear-gradient(to right, transparent, rgba(212,175,55,0.5));
}

.wp-divider span:last-child {
    background: linear-gradient(to left, transparent, rgba(212,175,55,0.5));
}

.wp-divider-diamond { color: var(--gold); font-size: 0.9rem; flex-shrink: 0; }

/* Closing section */
.wp-closing {
    padding: 40px 16px;
    text-align: center;
    background: var(--bg-light);
}

.wp-closing p { max-width: 720px; margin: 0 auto 16px; font-size: 1.05rem; }

/* ============================================================
   BREAKPOINTS
   ============================================================ */

@media (min-width: 480px) {
    .papers-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .white-papers { padding: 56px 24px; }
    .wp-closing   { padding: 56px 24px; }
    .paper-image img { height: 260px; }
    .paper-content   { padding: 28px; }
}

@media (min-width: 1024px) {
    .white-papers { padding: 70px 40px; }
    .wp-closing   { padding: 70px 32px; }
    .papers-grid  { grid-template-columns: repeat(3, 1fr); gap: 36px; }
    .paper-image img { height: 280px; }
}