/* ============================================================
   SignDeaf - FAQ Page
   ============================================================ */

:root {
    --sdfaq-blue: #1971c2;
    --sdfaq-blue-dark: #1357a0;
    --sdfaq-cyan: #1cb0f6;
    --sdfaq-navy: #0f1933;
    --sdfaq-ink: #10213f;
    --sdfaq-muted: #5d6f8c;
    --sdfaq-bg: #f4f8ff;
    --sdfaq-panel: #ffffff;
    --sdfaq-panel-soft: #f8fbff;
    --sdfaq-line: rgba(25, 113, 194, 0.14);
    --sdfaq-line-strong: rgba(25, 113, 194, 0.28);
    --sdfaq-shadow-sm: 0 14px 34px rgba(15, 25, 51, 0.08);
    --sdfaq-shadow-lg: 0 28px 70px rgba(15, 25, 51, 0.16);
    --sdfaq-reading: 72ch;
}

.sdfaq-page {
    background:
        radial-gradient(circle at 0% 0%, rgba(25, 113, 194, 0.11), transparent 22%),
        radial-gradient(circle at 100% 0%, rgba(28, 176, 246, 0.12), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, var(--sdfaq-bg) 42%, #edf4ff 100%);
    color: var(--sdfaq-ink);
}

.sdfaq-page a {
    color: inherit;
}

.sdfaq-page section[id] {
    scroll-margin-top: 118px;
}

.sdfaq-hero {
    position: relative;
    overflow: hidden;
    padding: 72px 0 42px;
    color: #fff;
    background:
        radial-gradient(circle at 18% 20%, rgba(28, 176, 246, 0.18), transparent 22%),
        radial-gradient(circle at 86% 18%, rgba(147, 197, 253, 0.16), transparent 20%),
        linear-gradient(140deg, #081225 0%, #0d2552 52%, #09162d 100%);
}

.sdfaq-hero::before,
.sdfaq-hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    pointer-events: none;
}

.sdfaq-hero::before {
    top: -100px;
    right: -90px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(28, 176, 246, 0.16), transparent 72%);
    filter: blur(12px);
    animation: sdfaq-float 15s ease-in-out infinite;
}

.sdfaq-hero::after {
    left: -70px;
    bottom: -120px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(25, 113, 194, 0.18), transparent 72%);
    filter: blur(14px);
    animation: sdfaq-float 18s ease-in-out infinite reverse;
}

.sdfaq-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
    gap: 28px;
    align-items: start;
}

.sdfaq-kicker,
.sdfaq-panel-label,
.sdfaq-proof-kicker,
.sdfaq-eyebrow,
.sdfaq-search-kicker {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.sdfaq-kicker {
    margin-bottom: 14px;
    background: rgba(25, 113, 194, 0.18);
    border: 1px solid rgba(147, 197, 253, 0.26);
    color: #bfdbfe;
}

.sdfaq-overline {
    margin: 0 0 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.sdfaq-hero h1,
.sdfaq-proof-card h2,
.sdfaq-section-head h2,
.sdfaq-rail-card h2,
.sdfaq-cta h2,
.sdfaq-empty h2,
.sdfaq-hero-note strong {
    letter-spacing: -0.03em;
}

.sdfaq-hero h1 {
    max-width: 11ch;
    margin: 0 0 16px;
    font-size: clamp(2.45rem, 4.8vw, 4rem);
    line-height: 1.02;
}

.sdfaq-hero-summary,
.sdfaq-lead {
    max-width: 62ch;
    margin: 0;
    font-size: 1rem;
    line-height: 1.72;
}

.sdfaq-hero-summary {
    color: rgba(255, 255, 255, 0.9);
}

.sdfaq-lead {
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.75);
}

.sdfaq-hero-search-wrap {
    max-width: 720px;
    margin-top: 22px;
    padding: 20px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05)),
        radial-gradient(circle at 100% 0%, rgba(28, 176, 246, 0.18), transparent 36%);
    box-shadow: var(--sdfaq-shadow-lg);
}

.sdfaq-panel-label {
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: rgba(255, 255, 255, 0.92);
}

.sdfaq-hero-search-copy {
    margin: 0 0 14px;
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.6;
}

.sdfaq-search-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
}

.sdfaq-search-form input {
    min-height: 64px;
    padding: 0 20px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: #ffffff;
    color: var(--sdfaq-ink);
    font-size: 1.03rem;
    font-weight: 500;
    box-shadow: inset 0 0 0 1px rgba(25, 113, 194, 0.03);
}

.sdfaq-search-form input::placeholder {
    color: #7890ae;
}

.sdfaq-search-form input:focus {
    box-shadow: inset 0 0 0 2px var(--sdfaq-blue);
    border-color: transparent;
}

.sdfaq-count {
    margin-top: 12px;
    font-size: 0.94rem;
    font-weight: 700;
}

.sdfaq-count--hero {
    color: #bfdbfe;
}

.sdfaq-hero-actions,
.sdfaq-empty-actions,
.sdfaq-rail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.sdfaq-hero-actions {
    margin-top: 18px;
}

.sdfaq-btn,
.sdfaq-clear-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    border-radius: 16px;
    font-weight: 800;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.sdfaq-btn {
    padding: 0.88rem 1.3rem;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--sdfaq-blue) 0%, var(--sdfaq-blue-dark) 100%);
    color: #ffffff;
    box-shadow: 0 16px 32px rgba(25, 113, 194, 0.22);
}

.sdfaq-btn:hover,
.sdfaq-btn:focus-visible,
.sdfaq-clear-btn:hover,
.sdfaq-clear-btn:focus-visible {
    transform: translateY(-1px);
}

.sdfaq-btn:hover,
.sdfaq-btn:focus-visible {
    box-shadow: 0 18px 34px rgba(25, 113, 194, 0.28);
}

.sdfaq-btn--ghost {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: none;
}

.sdfaq-btn--dark {
    background: var(--sdfaq-panel);
    color: var(--sdfaq-blue-dark);
    border-color: var(--sdfaq-line);
    box-shadow: none;
}

.sdfaq-clear-btn {
    padding: 0 1.3rem;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--sdfaq-blue) 0%, var(--sdfaq-blue-dark) 100%);
    color: #ffffff;
    box-shadow: 0 14px 28px rgba(25, 113, 194, 0.18);
}

.sdfaq-hero-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.sdfaq-hero-chips span {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.86);
    font-size: 0.88rem;
    font-weight: 700;
}

.sdfaq-hero-aside {
    display: grid;
    gap: 14px;
}

.sdfaq-hero-note {
    padding: 18px 18px 20px;
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05)),
        radial-gradient(circle at 100% 0%, rgba(28, 176, 246, 0.16), transparent 36%);
    box-shadow: var(--sdfaq-shadow-lg);
}

.sdfaq-hero-note--dark {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03)),
        radial-gradient(circle at 100% 0%, rgba(25, 113, 194, 0.18), transparent 38%);
}

.sdfaq-hero-note strong {
    display: block;
    margin-bottom: 8px;
    font-size: 1.32rem;
    line-height: 1.15;
    color: #ffffff;
}

.sdfaq-hero-note p {
    margin: 0;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.65;
}

.sdfaq-shell {
    padding: 28px 0 0;
}

.sdfaq-shell-grid {
    display: grid;
    grid-template-columns: minmax(280px, 330px) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.sdfaq-rail {
    position: sticky;
    top: 108px;
    display: grid;
    gap: 16px;
}

.sdfaq-rail-card,
.sdfaq-proof-card,
.sdfaq-section,
.sdfaq-cta,
.sdfaq-empty {
    position: relative;
    overflow: hidden;
    padding: 22px;
    border-radius: 24px;
    border: 1px solid var(--sdfaq-line);
    background: linear-gradient(180deg, var(--sdfaq-panel) 0%, var(--sdfaq-panel-soft) 100%);
    box-shadow: var(--sdfaq-shadow-sm);
}

.sdfaq-rail-card::before,
.sdfaq-proof-card::before,
.sdfaq-section::before,
.sdfaq-cta::before,
.sdfaq-empty::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--sdfaq-blue), var(--sdfaq-cyan));
}

.sdfaq-proof-kicker,
.sdfaq-search-kicker,
.sdfaq-eyebrow,
.sdfaq-kicker--soft {
    color: var(--sdfaq-blue-dark);
    background: rgba(25, 113, 194, 0.08);
    border: 1px solid rgba(25, 113, 194, 0.14);
}

.sdfaq-rail-card h2,
.sdfaq-proof-card h2,
.sdfaq-section-head h2,
.sdfaq-cta h2,
.sdfaq-empty h2 {
    margin: 0 0 12px;
    font-size: clamp(1.45rem, 2.4vw, 2.15rem);
    line-height: 1.12;
}

.sdfaq-rail-card p,
.sdfaq-proof-card p,
.sdfaq-section-head p,
.sdfaq-answer p,
.sdfaq-cta p,
.sdfaq-empty p {
    margin: 0;
    color: var(--sdfaq-muted);
    font-size: 0.98rem;
    line-height: 1.72;
}

.sdfaq-filter-column {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.sdfaq-filter {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    width: 100%;
    min-height: 52px;
    padding: 0.82rem 0.95rem;
    border-radius: 16px;
    border: 1px solid var(--sdfaq-line);
    background: #ffffff;
    color: var(--sdfaq-ink);
    text-align: left;
    font-weight: 800;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.sdfaq-filter:hover,
.sdfaq-filter:focus-visible,
.sdfaq-rail-links a:hover,
.sdfaq-rail-links a:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(15, 25, 51, 0.08);
    border-color: var(--sdfaq-line-strong);
}

.sdfaq-filter.is-active,
.sdfaq-filter[aria-pressed="true"] {
    background: linear-gradient(135deg, rgba(25, 113, 194, 0.11), rgba(28, 176, 246, 0.12));
    border-color: rgba(25, 113, 194, 0.26);
    color: var(--sdfaq-blue-dark);
}

.sdfaq-filter-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--sdfaq-line);
    background: rgba(25, 113, 194, 0.06);
    color: var(--sdfaq-blue-dark);
    font-size: 0.8rem;
    font-weight: 900;
    flex: 0 0 auto;
}

.sdfaq-rail-links {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.sdfaq-rail-links a {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: center;
    min-height: 50px;
    padding: 0.82rem 0.95rem;
    border-radius: 16px;
    border: 1px solid var(--sdfaq-line);
    background: #ffffff;
    color: var(--sdfaq-ink);
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.sdfaq-rail-links a span:first-child {
    color: var(--sdfaq-blue);
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.06em;
}

.sdfaq-rail-card--cta {
    background: linear-gradient(180deg, #ffffff 0%, #f4f9ff 100%);
}

.sdfaq-rail-card--cta p {
    margin-bottom: 16px;
}

.sdfaq-main {
    display: grid;
    gap: 20px;
}

.sdfaq-proof-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.sdfaq-proof-card {
    background: linear-gradient(180deg, #ffffff 0%, #f6fbff 100%);
}

.sdfaq-proof-card p {
    max-width: 48ch;
}

.sdfaq-sections {
    display: grid;
    gap: 20px;
}

.sdfaq-section {
    background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
}

.sdfaq-section-frame {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 16px;
    margin-bottom: 20px;
    align-items: start;
}

.sdfaq-section-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--sdfaq-blue) 0%, var(--sdfaq-blue-dark) 100%);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    box-shadow: 0 14px 28px rgba(25, 113, 194, 0.18);
}

.sdfaq-section-head {
    max-width: var(--sdfaq-reading);
}

.sdfaq-list {
    display: grid;
    gap: 12px;
}

.sdfaq-item {
    position: relative;
    overflow: hidden;
    border-radius: 18px;
    border: 1px solid rgba(25, 113, 194, 0.12);
    background: rgba(255, 255, 255, 0.92);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.sdfaq-item[open] {
    border-color: rgba(25, 113, 194, 0.28);
    background: #ffffff;
    box-shadow: 0 14px 28px rgba(15, 25, 51, 0.06);
}

.sdfaq-item summary {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    padding: 18px 66px 18px 18px;
    list-style: none;
    cursor: pointer;
    color: var(--sdfaq-ink);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.5;
}

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

.sdfaq-item summary::after {
    content: "+";
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(25, 113, 194, 0.18);
    background: rgba(25, 113, 194, 0.06);
    color: var(--sdfaq-blue-dark);
    font-size: 1.45rem;
    font-weight: 500;
}

.sdfaq-item[open] summary::after {
    content: "−";
}

.sdfaq-item-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(25, 113, 194, 0.08);
    color: var(--sdfaq-blue-dark);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    flex: 0 0 auto;
}

.sdfaq-item-question {
    display: block;
}

.sdfaq-answer {
    display: grid;
    gap: 12px;
    padding: 0 18px 20px 72px;
}

.sdfaq-answer p + p {
    margin-top: -2px;
}

.sdfaq-answer a {
    color: var(--sdfaq-blue);
    text-decoration: underline;
    text-underline-offset: 0.18em;
}

.sdfaq-item[hidden],
.sdfaq-section[hidden],
.sdfaq-empty[hidden] {
    display: none !important;
}

.sdfaq-empty,
.sdfaq-cta {
    text-align: center;
}

.sdfaq-empty p {
    max-width: 46ch;
    margin: 0 auto 18px;
}

.sdfaq-cta-wrap {
    padding: 24px 0 0;
}

.sdfaq-cta {
    background: linear-gradient(180deg, #ffffff 0%, #f4f9ff 100%);
}

.sdfaq-cta p {
    max-width: 58ch;
    margin: 0 auto 20px;
}

.sdfaq-page .sdfaq-btn:focus-visible,
.sdfaq-page .sdfaq-clear-btn:focus-visible,
.sdfaq-page .sdfaq-filter:focus-visible,
.sdfaq-page .sdfaq-search-form input:focus-visible,
.sdfaq-page .sdfaq-item summary:focus-visible,
.sdfaq-page .sdfaq-rail-links a:focus-visible,
.sdfaq-page a:focus-visible {
    outline: 3px solid rgba(28, 176, 246, 0.75);
    outline-offset: 3px;
}

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

.sdfaq-reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (max-width: 1180px) {
    .sdfaq-hero-grid,
    .sdfaq-shell-grid,
    .sdfaq-proof-strip {
        grid-template-columns: 1fr;
    }

    .sdfaq-hero-aside {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .sdfaq-rail {
        position: static;
    }
}

@media (max-width: 920px) {
    .sdfaq-hero {
        padding: 64px 0 38px;
    }

    .sdfaq-hero-aside {
        grid-template-columns: 1fr;
    }

    .sdfaq-section-frame {
        grid-template-columns: 1fr;
    }

    .sdfaq-answer {
        padding-left: 18px;
    }
}

@media (max-width: 720px) {
    .sdfaq-hero h1 {
        max-width: 12ch;
    }

    .sdfaq-search-form {
        grid-template-columns: 1fr;
    }

    .sdfaq-clear-btn {
        width: 100%;
    }

    .sdfaq-hero-actions,
    .sdfaq-empty-actions,
    .sdfaq-rail-actions {
        flex-direction: column;
    }

    .sdfaq-btn,
    .sdfaq-hero-actions .sdfaq-btn,
    .sdfaq-empty-actions .sdfaq-btn,
    .sdfaq-rail-actions .sdfaq-btn {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .sdfaq-hero {
        padding: 56px 0 34px;
    }

    .sdfaq-hero-search-wrap,
    .sdfaq-rail-card,
    .sdfaq-proof-card,
    .sdfaq-section,
    .sdfaq-cta,
    .sdfaq-empty {
        padding: 18px;
        border-radius: 20px;
    }

    .sdfaq-hero-chips span {
        width: 100%;
        justify-content: center;
    }

    .sdfaq-item summary {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 18px 58px 18px 18px;
    }

    .sdfaq-item-index {
        width: 36px;
        height: 36px;
    }

    .sdfaq-answer {
        padding: 0 18px 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sdfaq-hero::before,
    .sdfaq-hero::after,
    .sdfaq-reveal {
        animation: none !important;
        transition: none !important;
    }
}

@keyframes sdfaq-float {
    0%,
    100% {
        transform: translate3d(0, 0, 0);
    }
    50% {
        transform: translate3d(0, -14px, 0);
    }
}