/* ============================================
   SKY-FRAME SUBPAGE — Additional Styles
   Extends the HYVISION Design System (../style.css)
   ============================================ */

/* --- Hero bottom: credit left + scroll center (no overlap) --- */
.hero-bottom {
    position: relative;
    z-index: 2;
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: end;
    gap: 16px;
    padding: 0 var(--section-padding-x) max(16px, env(safe-area-inset-bottom));
    box-sizing: border-box;
    flex-shrink: 0;
}

.hero-caption {
    position: static;
    grid-column: 1;
    justify-self: start;
    max-width: 100%;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.4;
    text-align: left;
}

.hero-bottom .hero-scroll {
    grid-column: 2;
    margin-bottom: 0;
    justify-self: center;
}

.hero-bottom-spacer {
    grid-column: 3;
}

/* Product heroes: caption alone at bottom-left */
.hero > .hero-caption {
    position: absolute;
    bottom: max(16px, env(safe-area-inset-bottom));
    left: var(--section-padding-x);
    right: auto;
    z-index: 2;
    max-width: min(70%, 520px);
    font-size: 0.65rem;
}

/* --- Sky-Frame Introduction --- */
.sf-intro {
    background-color: var(--color-white);
}

.sf-intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.sf-logo-link {
    display: inline-block;
    margin-bottom: 28px;
    padding: 0;
    margin-left: 0;
}

.sf-logo {
    width: min(180px, 48vw);
    height: auto;
    display: block;
}

.sf-intro-content h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.sf-intro-content p {
    margin-bottom: 20px;
}

.sf-italic {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: clamp(1.2rem, 1.8vw, 1.5rem) !important;
    color: var(--color-matte-black) !important;
    margin-top: 32px !important;
    margin-bottom: 24px !important;
}

.sf-external-link {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-matte-black);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 4px;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.sf-external-link:hover {
    border-color: var(--color-matte-black);
    opacity: 1;
}

/* --- Products Section --- */
.sf-products {
    background-color: var(--color-offwhite);
}

.sf-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(24px, 3vw, 48px);
    max-width: 1400px;
    margin: 0 auto;
}

.sf-products-five {
    grid-template-columns: repeat(5, 1fr);
    gap: clamp(16px, 2vw, 32px);
}

.sf-product-card {
    text-align: center;
}

.sf-product-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition-smooth);
}

.sf-product-link:hover {
    transform: translateY(-4px);
}

.sf-product-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    border-radius: 0;
    margin-bottom: 16px;
}

.sf-product-image::after {
    content: '';
    position: absolute;
    inset: auto 0 0 0;
    height: 42%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.72) 0%, rgba(0, 0, 0, 0.28) 55%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.sf-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sf-product-card:hover .sf-product-image img {
    transform: none;
}

.sf-img-credit {
    display: block;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 0.65rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-warm-grey);
    margin-top: 8px;
    line-height: 1.4;
}

.sf-product-image .sf-img-credit {
    position: absolute;
    bottom: 8px;
    left: 10px;
    right: 10px;
    z-index: 2;
    margin-top: 0;
    font-size: 0.45rem;
    letter-spacing: 0.03em;
    line-height: 1.3;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: none;
    text-align: left;
}

.sf-product-card .sf-img-credit {
    margin-top: 0;
}

.sf-product-card h3 {
    font-family: var(--font-sans);
    font-size: clamp(1rem, 1.2vw, 1.25rem);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
    color: var(--color-matte-black);
}

.sf-product-card p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-warm-grey);
}

/* --- Video & Headline Section --- */
.sf-video-section {
    background-color: var(--color-white);
}

.sf-video-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: clamp(40px, 6vw, 100px);
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.sf-video-embed {
    position: relative;
}

.sf-video-placeholder {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background-color: var(--color-cream);
    cursor: pointer;
}

.sf-video-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sf-video-placeholder:hover img {
    transform: none;
}

.sf-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    opacity: 0.8;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.sf-video-placeholder:hover .sf-play-btn {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.sf-play-btn svg {
    width: 100%;
    height: 100%;
}

.sf-video-text h2 {
    margin-bottom: 16px;
}

.sf-video-text p {
    margin-bottom: 16px;
}

/* --- Contact Form Section --- */
.sf-contact {
    background-color: var(--color-offwhite);
}

.sf-contact-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.sf-contact-form {
    margin-top: clamp(32px, 4vw, 48px);
}

.sf-form-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.sf-form-group {
    display: flex;
    flex-direction: column;
}

.sf-form-group label {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-warm-grey);
    margin-bottom: 10px;
}

.sf-form-group input,
.sf-form-group textarea {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: 0.95rem;
    color: var(--color-anthracite);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 14px 16px;
    transition: border-color var(--transition-fast);
    outline: none;
    resize: vertical;
}

.sf-form-group input:focus,
.sf-form-group textarea:focus {
    border-color: var(--color-anthracite);
}

.sf-form-group input::placeholder,
.sf-form-group textarea::placeholder {
    color: rgba(138, 138, 138, 0.5);
}

.sf-form-full {
    margin-bottom: 32px;
}

.sf-contact-form .btn {
    margin-top: 8px;
}

/* --- References Section --- */
.sf-references {
    background-color: var(--color-white);
}

.sf-references-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(16px, 2vw, 32px);
    max-width: 1400px;
    margin: 0 auto;
}

.sf-ref-card {
    position: relative;
}

.sf-ref-image {
    overflow: hidden;
    aspect-ratio: 4/3;
}

.sf-ref-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sf-ref-card:hover .sf-ref-image img {
    transform: none;
}

.sf-ref-card .sf-img-credit {
    margin-top: 8px;
    color: var(--color-warm-grey);
    font-size: 0.55rem;
    letter-spacing: 0.03em;
    line-height: 1.35;
}

/* --- Brochures Section --- */
.sf-brochures {
    background-color: var(--color-offwhite);
}

.sf-brochures-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(20px, 2.5vw, 36px);
    max-width: 720px;
    margin: 0 auto;
}

.sf-brochures-four {
    grid-template-columns: repeat(4, 1fr);
    max-width: 920px;
}

.sf-brochure-card {
    display: block;
    text-decoration: none;
    background: transparent;
    padding: 0;
    border: none;
    transition: transform var(--transition-fast);
}

.sf-brochure-card:hover {
    transform: translateY(-4px);
    border-color: transparent;
}

.sf-brochure-image {
    overflow: hidden;
    aspect-ratio: 3/4;
    margin-bottom: 12px;
    max-width: 180px;
    margin-left: auto;
    margin-right: auto;
    background: var(--color-white);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.sf-brochure-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sf-brochure-card:hover .sf-brochure-image img {
    transform: none;
}

.sf-brochure-info {
    text-align: center;
}

.sf-brochure-info h4 {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    margin-bottom: 6px;
    color: var(--color-matte-black);
}

.sf-brochure-info .label {
    color: var(--color-warm-grey);
    transition: color var(--transition-fast);
    font-size: 0.7rem;
}

.sf-brochure-card:hover .sf-brochure-info .label {
    color: var(--color-matte-black);
}

/* Active nav link styling */
.active-link {
    color: var(--color-white) !important;
    position: relative;
}

.active-link::after {
    width: 100% !important;
}

.nav.scrolled .active-link {
    color: var(--color-matte-black) !important;
}

/* --- Responsive: Tablet --- */
@media (max-width: 1024px) {
    .sf-products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .sf-video-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .sf-form-row {
        grid-template-columns: 1fr;
    }

    .sf-references-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
    .hero-bottom {
        grid-template-columns: 1fr;
        gap: 20px;
        padding-bottom: max(28px, env(safe-area-inset-bottom));
    }

    .hero-caption {
        grid-column: 1;
        font-size: 0.75rem;
        text-align: center;
        justify-self: center;
        order: 2;
    }

    .hero-bottom .hero-scroll {
        grid-column: 1;
        order: 1;
    }

    .hero-bottom-spacer {
        display: none;
    }

    .hero > .hero-caption {
        bottom: max(24px, env(safe-area-inset-bottom));
        font-size: 0.75rem;
    }

    .sf-products-grid {
        grid-template-columns: 1fr;
    }

    .sf-references-grid {
        grid-template-columns: 1fr;
    }

    .sf-brochures-grid,
    .sf-brochures-four {
        grid-template-columns: repeat(2, 1fr);
        max-width: 420px;
        gap: 16px;
    }

    .sf-brochure-image {
        max-width: 140px;
    }
}
/* --- v3 dark Sky-Frame sections --- */
.sf-intro-dark,
.sf-products-dark,
.sf-video-dark,
.sf-contact-dark,
.sf-references-dark,
.sf-tech-block,
.sf-features-block,
.sf-gallery-section {
  background: var(--color-matte-black);
  color: rgba(255,255,255,0.7);
}

.sf-intro-dark .sf-logo {
  width: min(180px, 48vw);
  filter: invert(1);
}

.sf-side-figure figcaption,
.sf-gallery-item figcaption {
  font-size: 0.55rem !important;
  letter-spacing: 0.03em;
  line-height: 1.35;
}

.sf-tech-block h3,
.sf-features-block h3 {
  color: #fff;
  font-family: var(--font-sans);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.sf-tech-block .divider,
.sf-features-block .divider {
  background: rgba(255, 255, 255, 0.35);
  margin-bottom: 28px;
}

.sf-partner-line {
  max-width: 720px;
  margin: 0 0 28px;
  color: var(--color-warm-grey);
}

.sf-about-media {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(24px, 4vw, 48px);
  max-width: 1200px;
  margin: clamp(48px, 8vw, 96px) auto 0;
  align-items: center;
  padding: 0 var(--section-padding-x);
}

.sf-side-figure {
  margin: 0;
}

.sf-side-figure img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.sf-side-figure figcaption,
.sf-img-credit,
.sf-gallery-item figcaption {
  display: block;
  margin-top: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-warm-grey);
  text-align: left;
  line-height: 1.4;
}

.sf-inline-link {
  color: var(--color-matte-black);
  border-bottom: 1px solid rgba(26, 26, 26, 0.35);
  margin-left: 4px;
  white-space: normal;
}

.sf-inline-link:hover {
  opacity: 1;
  border-bottom-color: var(--color-matte-black);
}

.sf-italic {
  color: var(--color-matte-black) !important;
}

/* Dark sections: light text for credits / partner copy */
.sf-intro-dark .sf-partner-line,
.sf-intro-dark .sf-italic,
.sf-products-dark .sf-img-credit,
.sf-references-dark .sf-img-credit,
.sf-gallery-section figcaption,
.sf-tech-block .sf-img-credit,
.sf-features-block .sf-img-credit {
  color: rgba(255, 255, 255, 0.7) !important;
}

.sf-intro-dark .sf-inline-link {
  color: rgba(255, 255, 255, 0.95);
  border-bottom-color: rgba(255, 255, 255, 0.35);
}

.sf-intro-dark .sf-inline-link:hover {
  border-bottom-color: #fff;
}

.sf-intro-dark .sf-side-figure figcaption {
  color: rgba(255, 255, 255, 0.7);
}

.sf-products-dark .sf-product-card h3 {
  color: #fff;
}

.sf-products-dark .sf-product-card p {
  color: rgba(255,255,255,0.75);
}

.sf-video-embed video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

.sf-form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.sf-contact-dark label,
.sf-contact-dark .section-header p {
  color: rgba(255,255,255,0.75);
}

.sf-contact-dark input:not([type="checkbox"]),
.sf-contact-dark textarea {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  width: 100%;
  padding: 12px 14px;
  font: inherit;
}

.sf-contact-dark .privacy-check {
  color: rgba(255,255,255,0.65);
}

.sf-contact-dark .privacy-check input[type="checkbox"] {
  width: auto;
  accent-color: #fff;
}

.sf-references-six {
  grid-template-columns: repeat(3, 1fr);
}

.sf-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 28px);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
}

.sf-gallery-item {
  margin: 0;
}

.sf-gallery-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.sf-gallery-wide {
  grid-column: 1 / -1;
}

.sf-tech-grid,
.sf-features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 28px;
}

.sf-tech-grid h4,
.sf-features-grid h4 {
  color: #fff;
  margin-bottom: 8px;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

@media (max-width: 900px) {
  .sf-about-media,
  .sf-references-six,
  .sf-gallery-grid,
  .sf-products-five,
  .sf-form-row-2 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 901px) and (max-width: 1100px) {
  .sf-products-five {
    grid-template-columns: repeat(3, 1fr);
  }
  .sf-references-six {
    grid-template-columns: repeat(2, 1fr);
  }
  .sf-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}


/* --- MOBILE HARDENING v5 --- */
@media (max-width: 768px) {
  .sf-about-media {
    grid-template-columns: 1fr;
    margin-top: 40px;
    gap: 24px;
  }

  .sf-products-five,
  .sf-products-grid,
  .sf-references-six,
  .sf-gallery-grid {
    grid-template-columns: 1fr;
  }

  .sf-brochures-four {
    grid-template-columns: repeat(2, 1fr);
    max-width: 420px;
  }

  .sf-video-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .sf-form-row,
  .sf-form-row-2 {
    grid-template-columns: 1fr;
  }

  .sf-intro-content {
    padding: 0;
  }

  .sf-product-image {
    aspect-ratio: 4/3;
  }

  .sf-img-credit {
    text-align: left;
    line-height: 1.4;
  }

  .hero-caption {
    left: var(--section-padding-x);
    right: var(--section-padding-x);
    max-width: calc(100% - 2 * var(--section-padding-x));
  }

  .hero > .hero-caption {
    bottom: max(24px, env(safe-area-inset-bottom));
  }

  .sf-contact-form .btn {
    width: 100%;
  }

  .sf-gallery-wide {
    grid-column: auto;
  }

  .sf-brochures-grid,
  .sf-brochures-four {
    grid-template-columns: 1fr;
    max-width: 280px;
  }

  .sf-brochure-image {
    max-width: 180px;
    margin: 0 auto;
  }

  .sf-inline-link {
    white-space: normal;
  }
}

@media (min-width: 769px) and (max-width: 1100px) {
  .sf-products-five {
    grid-template-columns: repeat(3, 1fr);
  }

  .sf-references-six {
    grid-template-columns: repeat(2, 1fr);
  }

  .sf-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}