/* ════════════════════════════════════════════════════════════════
 * MAS · Cuadernos de viaje · style
 * Bloque 07 · coverflow horizontal · 5 destinos B&W + grano
 * Interactividad en view.js (drag/keyboard/bullets)
 * ════════════════════════════════════════════════════════════════ */

.mas-cuadernos {
    background: var(--color-bg, #FFFFFF);
    padding: var(--space-20, 80px) 0;
    position: relative;
    /* contain overflow del coverflow horizontal */
    overflow: hidden;
}

/* ─── header ─── */
.mas-cuadernos__head {
    max-width: var(--content-max, 1280px);
    margin: 0 auto var(--space-12, 48px);
    padding: 0 var(--grid-margin, 64px) var(--space-8, 32px);
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-16, 64px);
    align-items: end;
    border-bottom: 0.5px solid var(--color-border, #E3E6EA);
}
.mas-cuadernos__kicker {
    font-family: var(--font-sans);
    font-size: var(--fs-xs, 11px);
    color: var(--color-accent-strong, #8E1530);
    letter-spacing: var(--tr-wider, 0.15em);
    text-transform: uppercase;
    font-weight: var(--fw-semibold, 600);
    margin: 0 0 var(--space-3, 12px);
}
.mas-cuadernos__kicker::before { content: ''; }

.mas-cuadernos__title {
    font-family: var(--font-serif);
    font-weight: var(--fw-regular, 400);
    font-size: var(--fs-5xl, 64px);
    line-height: var(--lh-tight, 1);
    letter-spacing: var(--tr-display, -0.025em);
    margin: 0;
    color: var(--color-text, #1A1A1A);
}
.mas-cuadernos__title em {
    font-style: italic;
    color: var(--color-blue, #0A3161);
    font-weight: var(--fw-medium, 500);
}

.mas-cuadernos__desc {
    font-family: var(--font-serif);
    font-size: var(--fs-lg, 18px);
    line-height: var(--lh-relaxed, 1.55);
    color: var(--color-text-secondary, #555);
    margin: 0;
    padding-bottom: var(--space-2, 8px);
}
.mas-cuadernos__desc em {
    font-style: italic;
    color: var(--color-blue, #0A3161);
}

/* ─── stage del coverflow ─── */
.mas-cuadernos__stage {
    position: relative;
    padding: var(--space-12, 48px) 0 var(--space-10, 40px);
    user-select: none;
}

.mas-cuadernos__track {
    display: flex;
    align-items: stretch;
    gap: var(--space-6, 24px);
    /* cinta continua: sin padding de centrado (dejaría hueco al reciclar) y
       sin transición (el movimiento lo controla view.js por requestAnimationFrame) */
    padding: 0;
    cursor: grab;
    transition: none;
    will-change: transform;
    user-select: none;
    touch-action: pan-y;
}
.mas-cuadernos__card.is-clone { pointer-events: auto; }
.mas-cuadernos__track.is-dragging {
    cursor: grabbing;
    transition: none;
}

/* ─── card ─── */
.mas-cuadernos__card {
    flex: 0 0 640px;
    min-height: 600px;
    background: var(--color-bg-paper, #FAFBFC);
    border: 1px solid var(--color-border, #E3E6EA);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: transform 500ms cubic-bezier(0.16, 1, 0.3, 1),
                opacity 500ms cubic-bezier(0.16, 1, 0.3, 1),
                filter 500ms cubic-bezier(0.16, 1, 0.3, 1),
                border-color 150ms cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, opacity;
    overflow: hidden;
    position: relative;
    transform-origin: center center;
}
.mas-cuadernos__card:focus-visible {
    outline: 2px solid var(--color-accent, #B31942);
    outline-offset: 4px;
}

/* ─── foto ─── */
.mas-cuadernos__photo {
    aspect-ratio: 16 / 10;
    background-size: cover;
    background-position: center;
    background-color: var(--color-bg-alt, #F4F6F9);
    filter: grayscale(85%) sepia(0.18) contrast(1.08);
    transition: filter 500ms cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}
.mas-cuadernos__card:hover .mas-cuadernos__photo {
    filter: grayscale(25%) sepia(0.08) contrast(1.05);
}
.mas-cuadernos__photo::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='3'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.13 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    opacity: 0.55;
    mix-blend-mode: multiply;
    pointer-events: none;
}

/* ─── body ─── */
.mas-cuadernos__body {
    padding: var(--space-8, 32px) var(--space-8, 32px) var(--space-6, 24px);
    display: flex;
    flex-direction: column;
    gap: var(--space-3, 12px);
    flex: 1;
}
.mas-cuadernos__place {
    font-family: var(--font-sans);
    font-size: var(--fs-xs, 11px);
    color: var(--color-accent-strong, #8E1530);
    letter-spacing: var(--tr-wider, 0.15em);
    text-transform: uppercase;
    font-weight: var(--fw-semibold, 600);
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
}
.mas-cuadernos__place::before {
    content: '';
    width: 20px;
    height: 0.5px;
    background: var(--color-accent, #B31942);
}
.mas-cuadernos__card-title {
    font-family: var(--font-serif);
    font-weight: var(--fw-regular, 400);
    font-size: var(--fs-3xl, 36px);
    line-height: var(--lh-snug, 1.15);
    letter-spacing: var(--tr-tight, -0.015em);
    margin: 0;
    color: var(--color-text, #1A1A1A);
}
.mas-cuadernos__card-title em {
    font-style: italic;
    color: var(--color-blue, #0A3161);
}
.mas-cuadernos__lead {
    font-family: var(--font-serif);
    font-size: var(--fs-sm, 13px);
    line-height: var(--lh-relaxed, 1.55);
    color: var(--color-text-secondary, #555);
    margin: 0 0 var(--space-2, 8px);
    flex: 1;
}
.mas-cuadernos__lead em { font-style: italic; }

.mas-cuadernos__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3, 12px);
    padding-top: var(--space-4, 16px);
    border-top: 0.5px solid var(--color-border, #E3E6EA);
    margin-top: auto;
}
.mas-cuadernos__meta-src {
    font-family: var(--font-sans);
    font-size: var(--fs-xs, 11px);
    color: var(--color-text-muted, #6B6B6B);
    letter-spacing: var(--tr-wide, 0.05em);
}
.mas-cuadernos__meta-src strong {
    color: var(--color-text, #1A1A1A);
    font-weight: var(--fw-semibold, 600);
}
.mas-cuadernos__meta-arr {
    font-family: var(--font-sans);
    font-size: var(--fs-xs, 11px);
    color: var(--color-accent, #B31942);
    letter-spacing: var(--tr-wide, 0.05em);
    font-weight: var(--fw-semibold, 600);
    text-transform: uppercase;
    transition: transform 150ms cubic-bezier(0.4, 0, 0.2, 1);
}
.mas-cuadernos__card:hover .mas-cuadernos__meta-arr {
    transform: translateX(3px);
}

/* ─── controles ─── */
.mas-cuadernos__controls {
    max-width: var(--content-max, 1280px);
    margin: var(--space-10, 40px) auto 0;
    padding: 0 var(--grid-margin, 64px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-6, 24px);
    flex-wrap: wrap;
}
.mas-cuadernos__nav {
    display: flex;
    gap: var(--space-3, 12px);
}
.mas-cuadernos__btn {
    width: 48px;
    height: 48px;
    border: 1px solid var(--color-text, #1A1A1A);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text, #1A1A1A);
    transition: background 150ms cubic-bezier(0.4, 0, 0.2, 1),
                color 150ms cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0;
}
.mas-cuadernos__btn:hover {
    background: var(--color-text, #1A1A1A);
    color: var(--color-ink-on-dark, #FAFBFC);
}
.mas-cuadernos__btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}
.mas-cuadernos__btn:disabled:hover {
    background: transparent;
    color: var(--color-text, #1A1A1A);
}

.mas-cuadernos__bullets {
    display: flex;
    gap: var(--space-2, 8px);
    align-items: center;
}
.mas-cuadernos__bullet {
    width: 24px;
    height: 2px;
    background: rgba(179, 25, 66, 0.18);
    cursor: pointer;
    border: none;
    padding: 0;
    transition: background 150ms cubic-bezier(0.4, 0, 0.2, 1),
                width 150ms cubic-bezier(0.4, 0, 0.2, 1);
}
.mas-cuadernos__bullet:hover {
    background: rgba(179, 25, 66, 0.5);
}
.mas-cuadernos__bullet.is-active {
    background: var(--color-accent, #B31942);
    width: 40px;
}

.mas-cuadernos__pos {
    font-family: var(--font-sans);
    font-size: var(--fs-xs, 11px);
    color: var(--color-text-muted, #6B6B6B);
    letter-spacing: var(--tr-wide, 0.05em);
    font-variant-numeric: tabular-nums;
}
.mas-cuadernos__pos strong {
    color: var(--color-accent, #B31942);
    font-weight: var(--fw-semibold, 600);
}

.mas-cuadernos__hint {
    text-align: center;
    margin: var(--space-8, 32px) auto 0;
    font-family: var(--font-sans);
    font-size: var(--fs-2xs, 10px);
    color: var(--color-text-muted, #6B6B6B);
    letter-spacing: var(--tr-wider, 0.15em);
    text-transform: uppercase;
}

/* ════════════════════════════════════════════════════════════════
 * Responsive
 * ════════════════════════════════════════════════════════════════ */

@media (max-width: 1023px) {
    .mas-cuadernos__head {
        grid-template-columns: 1fr;
        gap: var(--space-8, 32px);
        align-items: start;
        padding-left: var(--space-8, 32px);
        padding-right: var(--space-8, 32px);
    }
    .mas-cuadernos__title { font-size: var(--fs-4xl, 48px); }
    .mas-cuadernos__card { flex: 0 0 480px; min-height: 520px; }
    .mas-cuadernos__track { padding: 0 calc(50vw - 240px); }
    .mas-cuadernos__card-title { font-size: var(--fs-2xl, 28px); }
    .mas-cuadernos__controls {
        padding-left: var(--space-8, 32px);
        padding-right: var(--space-8, 32px);
    }
}

@media (max-width: 767px) {
    .mas-cuadernos { padding: var(--space-16, 64px) 0; }
    .mas-cuadernos__head {
        padding-left: var(--space-5, 20px);
        padding-right: var(--space-5, 20px);
    }
    .mas-cuadernos__title { font-size: var(--fs-3xl, 36px); }
    .mas-cuadernos__desc { font-size: var(--fs-base, 16px); }
    .mas-cuadernos__card {
        flex: 0 0 calc(100vw - 48px);
        min-height: 480px;
    }
    .mas-cuadernos__track {
        padding: 0 24px;
        gap: var(--space-4, 16px);
    }
    .mas-cuadernos__body {
        padding: var(--space-6, 24px) var(--space-6, 24px) var(--space-5, 20px);
    }
    .mas-cuadernos__card-title { font-size: var(--fs-xl, 22px); }
    .mas-cuadernos__controls {
        padding-left: var(--space-5, 20px);
        padding-right: var(--space-5, 20px);
        justify-content: center;
    }
    /* a11y: nav buttons mantienen 48px (target-size sobrado de 44) */
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .mas-cuadernos__track,
    .mas-cuadernos__card,
    .mas-cuadernos__photo,
    .mas-cuadernos__meta-arr,
    .mas-cuadernos__btn,
    .mas-cuadernos__bullet {
        transition: none !important;
    }
}