/* ============================================================
   SignDeaf - BSL vs ASL
   ============================================================ */

:root {
    --sdbsl-ink: #0c1730;
    --sdbsl-muted: #516684;
    --sdbsl-line: rgba(149, 177, 220, 0.44);
    --sdbsl-line-strong: rgba(115, 151, 210, 0.65);
    --sdbsl-bg: #f2f7ff;
    --sdbsl-panel: rgba(255, 255, 255, 0.86);
    --sdbsl-panel-strong: #ffffff;
    --sdbsl-navy: #081326;
    --sdbsl-blue: #1971c2;
    --sdbsl-cyan: #2fb8ff;
    --sdbsl-gold: #ffd55a;
    --sdbsl-mint: #8ce9d0;
    --sdbsl-shadow-sm: 0 16px 40px rgba(10, 27, 62, 0.07);
    --sdbsl-shadow-lg: 0 24px 90px rgba(8, 19, 38, 0.18);
    --sdbsl-radius-sm: 18px;
    --sdbsl-radius-md: 26px;
    --sdbsl-radius-lg: 34px;
    --sdbsl-reading: 74ch;
    --sdbsl-heading: Georgia, "Times New Roman", serif;
}

.sdbsl-page {
    background:
        radial-gradient(circle at 0% 0%, rgba(25, 113, 194, 0.12), transparent 21%),
        radial-gradient(circle at 100% 10%, rgba(47, 184, 255, 0.14), transparent 24%),
        linear-gradient(180deg, #f7fbff 0%, var(--sdbsl-bg) 42%, #edf4ff 100%);
    color: var(--sdbsl-ink);
}

.sdbsl-hero {
    position: relative;
    overflow: hidden;
    padding: 92px 0 60px;
    background:
        radial-gradient(circle at 18% 18%, rgba(47, 184, 255, 0.16), transparent 24%),
        radial-gradient(circle at 82% 24%, rgba(255, 213, 90, 0.14), transparent 22%),
        linear-gradient(135deg, #081327 0%, #0f2552 52%, #071325 100%);
    color: #fff;
}

.sdbsl-hero::before,
.sdbsl-hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    filter: blur(12px);
    pointer-events: none;
}

.sdbsl-hero::before {
    width: 320px;
    height: 320px;
    top: -60px;
    right: 10%;
    background: radial-gradient(circle, rgba(47, 184, 255, 0.22), transparent 70%);
    animation: sdbsl-float-orb 11s ease-in-out infinite;
}

.sdbsl-hero::after {
    width: 260px;
    height: 260px;
    left: 4%;
    bottom: -80px;
    background: radial-gradient(circle, rgba(255, 213, 90, 0.2), transparent 70%);
    animation: sdbsl-float-orb 13s ease-in-out infinite reverse;
}

.sdbsl-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
    gap: 34px;
    align-items: center;
}

.sdbsl-kicker,
.sdbsl-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 0.79rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.sdbsl-kicker {
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.92);
}

.sdbsl-hero h1,
.sdbsl-section-head h2,
.sdbsl-spotlight h2,
.sdbsl-cta h2 {
    font-family: var(--sdbsl-heading);
    letter-spacing: -0.03em;
}

.sdbsl-hero h1 {
    max-width: 12ch;
    margin: 0 0 18px;
    font-size: clamp(2.6rem, 6vw, 5.3rem);
    line-height: 0.95;
}

.sdbsl-lead {
    max-width: 62ch;
    margin: 0 0 24px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 1.08rem;
    line-height: 1.9;
}

.sdbsl-hero-actions,
.sdbsl-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.sdbsl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0.9rem 1.4rem;
    border-radius: 999px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, #ffd55a 0%, #ffed9f 100%);
    color: #172033;
    font-weight: 900;
    box-shadow: 0 16px 32px rgba(255, 213, 90, 0.24);
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.sdbsl-btn:hover,
.sdbsl-btn:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(255, 213, 90, 0.34);
}

.sdbsl-btn--ghost {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.18);
    color: #fff;
    box-shadow: none;
}

.sdbsl-hero-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 28px;
}

.sdbsl-summary-card {
    min-height: 100%;
    padding: 18px 18px 20px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(10px);
}

.sdbsl-summary-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.86rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--sdbsl-gold);
}

.sdbsl-summary-card p {
    margin: 0;
    color: rgba(255, 255, 255, 0.86);
    line-height: 1.72;
    font-size: 0.98rem;
}

.sdbsl-hero-visual {
    position: relative;
    min-height: 520px;
    border-radius: 36px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.05), transparent 60%);
    box-shadow: var(--sdbsl-shadow-lg);
    overflow: hidden;
}

.sdbsl-orbit {
    position: absolute;
    inset: 50%;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.11);
    transform: translate(-50%, -50%);
}

.sdbsl-orbit--one {
    width: 360px;
    height: 360px;
    animation: sdbsl-spin 24s linear infinite;
}

.sdbsl-orbit--two {
    width: 250px;
    height: 250px;
    border-style: dashed;
    animation: sdbsl-spin 18s linear infinite reverse;
}

.sdbsl-language-card {
    position: absolute;
    width: 210px;
    padding: 20px;
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    box-shadow: var(--sdbsl-shadow-sm);
    backdrop-filter: blur(16px);
}

.sdbsl-language-card span,
.sdbsl-language-card small {
    display: block;
}

.sdbsl-language-card span {
    margin-bottom: 8px;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sdbsl-language-card strong {
    display: block;
    font-size: 1.22rem;
    line-height: 1.28;
}

.sdbsl-language-card small {
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.92rem;
}

.sdbsl-language-card--bsl {
    top: 68px;
    left: 34px;
    background: linear-gradient(180deg, rgba(47, 184, 255, 0.22), rgba(47, 184, 255, 0.06));
    animation: sdbsl-float-card 7s ease-in-out infinite;
}

.sdbsl-language-card--asl {
    right: 34px;
    bottom: 104px;
    background: linear-gradient(180deg, rgba(255, 213, 90, 0.2), rgba(255, 213, 90, 0.06));
    animation: sdbsl-float-card 8.5s ease-in-out infinite reverse;
}

.sdbsl-visual-note {
    position: absolute;
    left: 50%;
    bottom: 36px;
    width: min(86%, 320px);
    padding: 18px 20px;
    border-radius: 22px;
    transform: translateX(-50%);
    background: rgba(8, 19, 38, 0.56);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.92);
    text-align: center;
    line-height: 1.7;
    font-weight: 700;
}

.sdbsl-jump-nav {
    position: sticky;
    top: 108px;
    z-index: 25;
    padding: 18px 0 0;
}

.sdbsl-jump-nav__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 14px;
    border-radius: 999px;
    border: 1px solid rgba(149, 177, 220, 0.34);
    background: rgba(255, 255, 255, 0.76);
    backdrop-filter: blur(14px);
    box-shadow: 0 12px 30px rgba(10, 27, 62, 0.08);
}

.sdbsl-jump-nav__inner a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--sdbsl-muted);
    font-size: 0.92rem;
    font-weight: 700;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.sdbsl-jump-nav__inner a:hover,
.sdbsl-jump-nav__inner a:focus-visible {
    background: rgba(25, 113, 194, 0.09);
    color: var(--sdbsl-blue);
    transform: translateY(-1px);
}

.sdbsl-section {
    position: relative;
    padding: 74px 0;
}

.sdbsl-section--spotlight,
.sdbsl-section--quote,
.sdbsl-section--cta {
    padding-top: 34px;
}

.sdbsl-section-head {
    max-width: var(--sdbsl-reading);
    margin-bottom: 28px;
}

.sdbsl-eyebrow {
    margin-bottom: 14px;
    color: var(--sdbsl-blue);
    background: rgba(25, 113, 194, 0.08);
    border: 1px solid rgba(25, 113, 194, 0.1);
}

.sdbsl-section-head h2,
.sdbsl-spotlight h2,
.sdbsl-cta h2 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 3vw, 3.5rem);
    line-height: 1.02;
}

.sdbsl-section-head p,
.sdbsl-spotlight p,
.sdbsl-compare-card p,
.sdbsl-feature-card p,
.sdbsl-reason-card p,
.sdbsl-timeline-item p,
.sdbsl-faq-copy p,
.sdbsl-cta p {
    margin: 0;
    color: var(--sdbsl-muted);
    font-size: 1.03rem;
    line-height: 1.9;
}

.sdbsl-card-grid {
    display: grid;
    gap: 20px;
}

.sdbsl-card-grid--four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.sdbsl-card-grid--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sdbsl-card-grid--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sdbsl-compare-card,
.sdbsl-feature-card,
.sdbsl-reason-card,
.sdbsl-timeline-item,
.sdbsl-faq-item,
.sdbsl-spotlight,
.sdbsl-cta,
.sdbsl-quote,
.sdbsl-table-wrap {
    border: 1px solid var(--sdbsl-line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(247, 251, 255, 0.98) 100%);
    box-shadow: var(--sdbsl-shadow-sm);
}

.sdbsl-compare-card,
.sdbsl-feature-card,
.sdbsl-reason-card,
.sdbsl-timeline-item {
    position: relative;
    overflow: hidden;
    padding: 24px;
    border-radius: var(--sdbsl-radius-md);
}

.sdbsl-compare-card::before,
.sdbsl-feature-card::before,
.sdbsl-reason-card::before,
.sdbsl-timeline-item::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--sdbsl-blue), var(--sdbsl-cyan), var(--sdbsl-gold));
    opacity: 0.95;
}

.sdbsl-compare-label {
    display: inline-flex;
    margin-bottom: 18px;
    color: var(--sdbsl-blue);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.82rem;
}

.sdbsl-compare-sides {
    display: grid;
    gap: 18px;
}

.sdbsl-compare-sides small {
    display: block;
    margin-bottom: 8px;
    color: var(--sdbsl-ink);
    font-size: 0.84rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.sdbsl-compare-sides p,
.sdbsl-feature-card p,
.sdbsl-reason-card p,
.sdbsl-timeline-item p {
    font-size: 0.99rem;
}

.sdbsl-spotlight,
.sdbsl-cta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    align-items: center;
    padding: 30px;
    border-radius: var(--sdbsl-radius-lg);
}

.sdbsl-spotlight {
    background:
        radial-gradient(circle at left center, rgba(47, 184, 255, 0.12), transparent 24%),
        linear-gradient(135deg, #ffffff 0%, #f4f9ff 100%);
}

.sdbsl-spotlight-badge {
    min-width: 230px;
    padding: 22px;
    border-radius: 26px;
    background: linear-gradient(180deg, #0f2552 0%, #081326 100%);
    color: #fff;
    box-shadow: 0 18px 40px rgba(8, 19, 38, 0.16);
}

.sdbsl-spotlight-badge strong {
    display: block;
    margin-bottom: 8px;
    font-size: 2rem;
    font-family: var(--sdbsl-heading);
}

.sdbsl-spotlight-badge span {
    display: block;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.72;
}

.sdbsl-table-wrap {
    overflow-x: auto;
    border-radius: 30px;
}

.sdbsl-table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
}

.sdbsl-table thead th {
    padding: 18px 20px;
    background: linear-gradient(135deg, #0f2552 0%, #122f68 100%);
    color: #fff;
    text-align: left;
    font-size: 0.92rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.sdbsl-table thead th:first-child {
    border-top-left-radius: 30px;
}

.sdbsl-table thead th:last-child {
    border-top-right-radius: 30px;
}

.sdbsl-table tbody th,
.sdbsl-table tbody td {
    padding: 18px 20px;
    border-top: 1px solid var(--sdbsl-line);
    vertical-align: top;
    line-height: 1.78;
}

.sdbsl-table tbody th {
    width: 22%;
    color: var(--sdbsl-ink);
    background: rgba(25, 113, 194, 0.04);
    font-size: 0.98rem;
    text-align: left;
}

.sdbsl-table tbody td {
    color: var(--sdbsl-muted);
    font-size: 0.98rem;
}

.sdbsl-two-col {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 26px;
    align-items: start;
}

.sdbsl-timeline {
    position: relative;
    display: grid;
    gap: 18px;
}

.sdbsl-timeline::before {
    content: "";
    position: absolute;
    left: 13px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(180deg, var(--sdbsl-blue), rgba(47, 184, 255, 0.18));
}

.sdbsl-timeline-item {
    position: relative;
    padding-left: 34px;
}

.sdbsl-timeline-item::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 28px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sdbsl-blue), var(--sdbsl-cyan));
    box-shadow: 0 0 0 7px rgba(25, 113, 194, 0.08);
}

.sdbsl-timeline-item h3,
.sdbsl-feature-card h3,
.sdbsl-reason-card h3 {
    margin: 0 0 10px;
    font-size: 1.28rem;
    line-height: 1.3;
}

.sdbsl-section--contrast {
    background:
        radial-gradient(circle at 14% 20%, rgba(25, 113, 194, 0.08), transparent 20%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.12));
}

.sdbsl-hand-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: 18px;
    border-radius: 18px;
    background: linear-gradient(135deg, #0f2552 0%, #1a4d99 100%);
    color: #fff;
    font-size: 1.5rem;
    font-weight: 900;
    box-shadow: 0 16px 30px rgba(15, 37, 82, 0.16);
}

.sdbsl-quote {
    padding: 34px;
    border-radius: var(--sdbsl-radius-lg);
    text-align: center;
}

.sdbsl-quote p {
    max-width: 32ch;
    margin: 0 auto;
    color: var(--sdbsl-ink);
    font-family: var(--sdbsl-heading);
    font-size: clamp(1.6rem, 3vw, 2.5rem);
    line-height: 1.28;
}

.sdbsl-faq {
    display: grid;
    gap: 14px;
}

.sdbsl-faq-item {
    padding: 0;
    border-radius: 24px;
    overflow: hidden;
}

.sdbsl-faq-item summary {
    position: relative;
    display: block;
    padding: 22px 62px 22px 22px;
    cursor: pointer;
    color: var(--sdbsl-ink);
    font-size: 1.08rem;
    font-weight: 800;
    list-style: none;
}

.sdbsl-faq-item summary::-webkit-details-marker {
    display: none;
}

.sdbsl-faq-item summary::after {
    content: "+";
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(25, 113, 194, 0.08);
    color: var(--sdbsl-blue);
    font-size: 1.5rem;
    font-weight: 400;
}

.sdbsl-faq-item[open] summary::after {
    content: "-";
}

.sdbsl-faq-copy {
    padding: 0 22px 22px;
}

.sdbsl-section--cta .sdbsl-cta {
    background:
        radial-gradient(circle at 0% 0%, rgba(255, 213, 90, 0.18), transparent 18%),
        radial-gradient(circle at 100% 0%, rgba(47, 184, 255, 0.16), transparent 20%),
        linear-gradient(135deg, #ffffff 0%, #f6fbff 100%);
}

.sdbsl-text-link {
    align-self: center;
    color: var(--sdbsl-blue);
    font-weight: 800;
}

.sdbsl-text-link:hover,
.sdbsl-text-link:focus-visible {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.sdbsl-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.sdbsl-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes sdbsl-float-orb {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(22px);
    }
}

@keyframes sdbsl-float-card {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-12px) rotate(1.2deg);
    }
}

@keyframes sdbsl-spin {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@media (max-width: 1180px) {
    .sdbsl-card-grid--four {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sdbsl-two-col,
    .sdbsl-hero-grid,
    .sdbsl-spotlight,
    .sdbsl-cta {
        grid-template-columns: 1fr;
    }

    .sdbsl-hero-visual {
        min-height: 420px;
    }
}

@media (max-width: 900px) {
    .sdbsl-jump-nav {
        position: static;
        padding-top: 12px;
    }

    .sdbsl-jump-nav__inner {
        border-radius: 28px;
    }

    .sdbsl-hero {
        padding-top: 72px;
    }

    .sdbsl-hero-summary,
    .sdbsl-card-grid--three,
    .sdbsl-card-grid--two {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .sdbsl-section {
        padding: 56px 0;
    }

    .sdbsl-card-grid--four {
        grid-template-columns: 1fr;
    }

    .sdbsl-hero h1 {
        max-width: 11ch;
    }

    .sdbsl-hero-visual {
        min-height: 360px;
    }

    .sdbsl-language-card {
        width: 170px;
        padding: 16px;
    }

    .sdbsl-language-card strong {
        font-size: 1rem;
    }

    .sdbsl-language-card--bsl {
        top: 28px;
        left: 18px;
    }

    .sdbsl-language-card--asl {
        right: 18px;
        bottom: 92px;
    }

    .sdbsl-spotlight,
    .sdbsl-cta,
    .sdbsl-quote {
        padding: 24px;
    }

    .sdbsl-table {
        min-width: 680px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sdbsl-reveal,
    .sdbsl-hero::before,
    .sdbsl-hero::after,
    .sdbsl-orbit,
    .sdbsl-language-card,
    .sdbsl-btn,
    .sdbsl-jump-nav__inner a {
        animation: none !important;
        transition: none !important;
    }

    .sdbsl-reveal {
        opacity: 1;
        transform: none;
    }

    html {
        scroll-behavior: auto;
    }
}