/*
 * Case study layout — refined design system shared with landing.css (Variant D).
 * Funnel Display for headlines, Inter for body, JetBrains Mono for code/labels.
 * Violet (#5b4fc7) + honey (#f0b322) palette, dark orb interstitials, hairline rules.
 */

.case-study {
    /* Refined brand tokens (mirror landing.css Variant D) */
    --cs-ink: #0F0F12;
    --cs-ink-soft: #1F1B2E;
    --cs-muted: #6B6478;
    --cs-muted-soft: #9B95A8;
    --cs-paper: #FFFFFF;
    --cs-surface: #F9F8FC;
    --cs-bg: #FAFAFC;
    --cs-bg-warm: #FCFAF4;
    --cs-bg-cool: #F6F4FD;
    --cs-violet: #5b4fc7;
    --cs-violet-deep: #4d40b8;
    --cs-violet-soft: #c0b8f3;
    --cs-violet-50: #f0eefb;
    --cs-violet-100: #e1ddf6;
    --cs-honey: #f0b322;
    --cs-honey-deep: #d68f0d;
    --cs-honey-soft: #fbecb5;
    --cs-honey-50: #fefdf3;
    --cs-honey-100: #fdf6dd;
    --cs-rule: rgba(15, 15, 18, 0.08);
    --cs-rule-strong: rgba(15, 15, 18, 0.14);
    --cs-shadow-soft: 0 24px 50px -28px rgba(91, 79, 199, 0.28);
    --cs-shadow-deep: 0 32px 70px -32px rgba(91, 79, 199, 0.32);
    --cs-dark-grad: linear-gradient(135deg, #09090b 0%, #14102a 50%, #221608 100%);

    max-width: 880px;
    margin: 0 auto;
    background: var(--cs-paper);
    border: 1px solid var(--cs-rule);
    border-radius: 24px;
    padding: 3.5rem 3.25rem 3rem;
    box-shadow: 0 24px 60px -28px rgba(91, 79, 199, 0.22);
    color: var(--cs-ink);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 17px;
    line-height: 1.6;
}

/* ===== Top tag — hairline eyebrow (replaces pill) ===== */
.case-study-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--cs-ink-soft);
    margin-bottom: 1.1rem;
}
.case-study-tag::before {
    content: '';
    display: inline-block;
    width: 2rem;
    height: 1.5px;
    background: var(--cs-violet);
    flex-shrink: 0;
}

.case-study-title {
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: clamp(2rem, 3.5vw, 2.6rem);
    font-weight: 700;
    color: var(--cs-ink);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.case-study-lede {
    color: var(--cs-ink-soft);
    font-size: 1.12rem;
    line-height: 1.6;
    margin-bottom: 2.75rem;
    max-width: 60ch;
}

/* ===== Header (logo + meta) ===== */
.case-study-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-bottom: 1.85rem;
    border-bottom: 1px solid var(--cs-rule);
    margin-bottom: 2.5rem;
}

.case-study-logo {
    flex-shrink: 0;
    width: 84px;
    height: 84px;
    border-radius: 16px;
    background: var(--cs-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--cs-rule);
}

.case-study-logo img {
    max-width: 70%;
    max-height: 70%;
    object-fit: contain;
}

.case-study-meta h2 {
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cs-ink);
    margin-bottom: 0.3rem;
    letter-spacing: -0.025em;
}

.case-study-meta p {
    color: var(--cs-muted);
    font-size: 0.95rem;
}

.case-study-meta a {
    color: var(--cs-violet);
    font-weight: 500;
}
.case-study-meta a:hover { color: var(--cs-violet-deep); }

/* ===== Hero quote — dark orb interstitial card ===== */
.case-study-hero-quote {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    margin: 0 0 3rem;
    padding: 3rem 2.25rem 2.5rem;
    background: var(--cs-dark-grad);
    border: 1px solid rgba(245, 245, 250, 0.08);
    border-radius: 22px;
    text-align: center;
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: clamp(1.1rem, 1.8vw, 1.4rem);
    line-height: 1.5;
    color: rgba(245, 245, 250, 0.95);
    font-style: normal;
    font-weight: 500;
    letter-spacing: -0.01em;
    box-shadow: 0 28px 60px -20px rgba(20, 16, 42, 0.55);
}
.case-study-hero-quote::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 32rem;
    height: 32rem;
    margin-top: -16rem;
    margin-left: -16rem;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(91, 79, 199, 0.55) 0%,
        rgba(140, 132, 216, 0.35) 35%,
        rgba(240, 179, 34, 0.25) 70%,
        rgba(240, 179, 34, 0) 100%
    );
    filter: blur(70px);
    pointer-events: none;
    z-index: -1;
}
.case-study-hero-quote em {
    font-style: italic;
    background: linear-gradient(120deg, #c0b8f3 0%, #f0b322 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.case-study-hero-quote cite {
    display: block;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(245, 245, 250, 0.12);
    font-style: normal;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: rgba(245, 245, 250, 0.6);
    font-weight: 500;
    letter-spacing: 0.04em;
}

/* ===== Stats grid ===== */
.case-study-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.case-stat {
    background: var(--cs-paper);
    border: 1px solid var(--cs-rule);
    border-radius: 16px;
    padding: 1.75rem 1.25rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.case-stat::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--cs-violet) 0%, var(--cs-honey) 100%);
}
.case-stat:hover {
    transform: translateY(-2px);
    box-shadow: var(--cs-shadow-soft);
    border-color: var(--cs-rule-strong);
}

.case-stat-value {
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: 2.3rem;
    font-weight: 700;
    background: linear-gradient(120deg, var(--cs-violet) 0%, var(--cs-honey-deep) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: 0.6rem;
    letter-spacing: -0.025em;
}

.case-stat-label {
    font-size: 0.86rem;
    color: var(--cs-muted);
    line-height: 1.5;
}

/* ===== Sections ===== */
.case-study-section {
    margin-bottom: 2.75rem;
}

.case-study-section h3 {
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: 1.45rem;
    font-weight: 600;
    color: var(--cs-ink);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.case-study-section p {
    color: var(--cs-ink-soft);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 0.95rem;
}

.case-study-section a {
    color: var(--cs-violet);
    font-weight: 500;
    text-decoration: none;
    border-bottom: 1px solid var(--cs-violet-100);
    transition: border-color 0.2s, color 0.2s;
}
.case-study-section a:hover {
    color: var(--cs-violet-deep);
    border-bottom-color: var(--cs-violet);
    text-decoration: none;
}

.case-study-section em {
    color: var(--cs-violet-deep);
    font-style: italic;
    font-weight: 500;
}

.case-study-section strong {
    color: var(--cs-ink);
    font-weight: 600;
}

/* ===== Estimate aside — refined pastel card with hairline label ===== */
.case-study-estimate {
    position: relative;
    margin: 1.85rem 0 0.5rem;
    padding: 2.5rem 1.65rem 1.5rem;
    background: linear-gradient(180deg, var(--cs-violet-50) 0%, #ffffff 100%);
    border: 1px solid var(--cs-violet-100);
    border-radius: 12px;
    box-shadow: 0 1px 2px rgba(91, 79, 199, 0.06);
}

.case-study-estimate::before {
    /* Hairline label — violet mark + uppercase mono label, no pill bg. */
    content: attr(data-label);
    display: inline-flex;
    align-items: center;
    position: absolute;
    top: 1rem;
    left: 1.65rem;
    color: var(--cs-violet);
    font-family: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    line-height: 1;
    text-transform: uppercase;
    white-space: nowrap;
    padding-left: 1.85rem;
}
.case-study-estimate::after {
    content: '';
    position: absolute;
    top: calc(1rem + 0.35rem);
    left: 1.65rem;
    width: 1.5rem;
    height: 1.5px;
    background: var(--cs-violet);
}

.case-study-estimate p {
    margin: 0;
    color: var(--cs-ink-soft);
    font-size: 0.97rem;
    line-height: 1.7;
}

.case-study-estimate p + p {
    margin-top: 0.55rem;
}

/* ===== Payback callout — dark orb mini-card (matches hero quote style) ===== */
.case-study-payback {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    margin: 1.85rem 0;
    padding: 1.75rem 1.85rem;
    background: var(--cs-dark-grad);
    border: 1px solid rgba(245, 245, 250, 0.08);
    border-radius: 16px;
    color: rgba(245, 245, 250, 0.95);
    box-shadow: 0 20px 50px -16px rgba(20, 16, 42, 0.5);
}
.case-study-payback::before {
    content: "";
    position: absolute;
    top: -30%;
    right: -20%;
    width: 24rem;
    height: 24rem;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(240, 179, 34, 0.55) 0%,
        rgba(214, 143, 13, 0.4) 35%,
        rgba(91, 79, 199, 0.3) 70%,
        rgba(91, 79, 199, 0) 100%
    );
    filter: blur(60px);
    pointer-events: none;
    z-index: -1;
}

.case-study-payback-label {
    /* Hairline eyebrow on dark surface — honey mark + uppercase mono label. */
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--cs-honey-soft);
    margin-bottom: 0.95rem;
}
.case-study-payback-label::before {
    content: '';
    display: inline-block;
    width: 1.75rem;
    height: 1.5px;
    background: var(--cs-honey);
    flex-shrink: 0;
}

.case-study-payback p {
    margin: 0;
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: 1.2rem;
    line-height: 1.5;
    font-weight: 500;
    color: rgba(245, 245, 250, 0.95);
    letter-spacing: -0.01em;
}

.case-study-payback strong {
    color: #ffffff;
    background: linear-gradient(120deg, #c0b8f3 0%, #f0b322 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

/* ===== Portrait ===== */
.case-study-portrait {
    margin: 2.75rem 0 0.5rem;
    padding: 0;
    text-align: center;
}

.case-study-portrait img {
    width: 100%;
    max-width: 720px;
    height: auto;
    border-radius: 16px;
    border: 1px solid var(--cs-rule);
    box-shadow: var(--cs-shadow-deep);
    display: block;
    margin: 0 auto;
}

.case-study-portrait figcaption {
    font-size: 0.88rem;
    color: var(--cs-muted);
    margin-top: 0.95rem;
    font-style: italic;
    line-height: 1.5;
}

/* ===== Charts ===== */
.case-study-chart {
    margin: 1.85rem 0 0.5rem;
    padding: 1.75rem 1.5rem;
    background: var(--cs-surface);
    border: 1px solid var(--cs-rule);
    border-radius: 16px;
}

.case-chart-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--cs-muted);
    text-align: center;
    margin-bottom: 1.1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.case-chart-svg {
    width: 100%;
    height: auto;
    max-height: 320px;
    display: block;
}

.case-chart-caption {
    font-size: 0.85rem;
    color: var(--cs-muted);
    text-align: center;
    margin-top: 0.95rem;
    font-style: italic;
    line-height: 1.5;
}

/* ===== Closing quote — dark orb interstitial (quieter than hero) ===== */
.case-study-quote-bottom blockquote {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    margin: 0;
    padding: 2.25rem 2rem 1.85rem;
    background: var(--cs-dark-grad);
    border: 1px solid rgba(245, 245, 250, 0.08);
    border-radius: 18px;
    color: rgba(245, 245, 250, 0.95);
    box-shadow: 0 24px 55px -22px rgba(20, 16, 42, 0.55);
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: 1.1rem;
    line-height: 1.55;
    font-style: normal;
    font-weight: 500;
    letter-spacing: -0.005em;
    text-align: left;
}
.case-study-quote-bottom blockquote::before {
    content: "";
    position: absolute;
    top: -25%;
    right: -15%;
    width: 24rem;
    height: 24rem;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(91, 79, 199, 0.5) 0%,
        rgba(140, 132, 216, 0.32) 35%,
        rgba(240, 179, 34, 0.22) 70%,
        rgba(240, 179, 34, 0) 100%
    );
    filter: blur(70px);
    pointer-events: none;
    z-index: -1;
}
.case-study-quote-bottom blockquote::after {
    content: "\201D";
    position: absolute;
    top: 0.4rem;
    right: 1.1rem;
    font-family: 'Funnel Display', Georgia, serif;
    font-size: 5.5rem;
    line-height: 1;
    background: linear-gradient(120deg, #c0b8f3 0%, #f0b322 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0.45;
    pointer-events: none;
    font-weight: 700;
}

.case-study-quote-bottom cite {
    display: block;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(245, 245, 250, 0.12);
    text-align: right;
    font-style: normal;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: rgba(245, 245, 250, 0.6);
    font-weight: 500;
    letter-spacing: 0.03em;
}

.case-study-quote-bottom cite::before { display: none; }

.case-study-quote-bottom blockquote em {
    font-style: italic;
    background: linear-gradient(120deg, #c0b8f3 0%, #f0b322 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 500;
}

/* ===== Footer — dark CTA card (matches landing's .elv-cta-inner) ===== */
/* Mid-article CTA — reuses the dark footer card, just spaced as an
   interjection between sections (~1/3 of the article). */
.case-study-cta-mid {
    display: block;
    margin: 3rem 0;
}

.case-study-footer {
    margin-top: 3.5rem;
    padding: 0;
    border-top: none;
    display: block;
}

.case-study-footer-card {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: var(--cs-dark-grad);
    border: 1px solid rgba(245, 245, 250, 0.08);
    border-radius: 22px;
    padding: 2.75rem 2rem;
    text-align: center;
    color: rgba(245, 245, 250, 0.95);
    box-shadow: 0 28px 60px -20px rgba(20, 16, 42, 0.55);
}
.case-study-footer-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 28rem;
    height: 28rem;
    margin-top: -14rem;
    margin-left: -14rem;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(91, 79, 199, 0.55) 0%,
        rgba(140, 132, 216, 0.35) 35%,
        rgba(240, 179, 34, 0.25) 70%,
        rgba(240, 179, 34, 0) 100%
    );
    filter: blur(70px);
    pointer-events: none;
    z-index: -1;
}
.case-study-footer-card h4 {
    font-family: 'Funnel Display', 'Inter', sans-serif;
    font-size: clamp(1.5rem, 2.5vw, 1.95rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
    color: #ffffff;
}
.case-study-footer-card p {
    color: rgba(245, 245, 250, 0.7);
    font-size: 1.02rem;
    line-height: 1.55;
    margin: 0 auto 1.75rem;
    max-width: 48ch;
}

.case-study-footer .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.95rem 1.75rem;
    background: var(--cs-violet);
    color: #ffffff;
    border: 1px solid var(--cs-violet);
    border-radius: 10px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    box-shadow: 0 16px 36px -14px rgba(91, 79, 199, 0.55);
}

.case-study-footer .btn-primary:hover {
    background: var(--cs-violet-deep);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 22px 44px -14px rgba(91, 79, 199, 0.7);
}

/* Inline signup form inside the footer card. Mirrors the landing
   .elv-signup-form pattern (dark variant) so the visual language is
   identical across landing and case studies. */
.case-study-signup-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: stretch;
    max-width: 480px;
    margin: 0 auto;
}
.case-study-signup-form input[type="email"] {
    flex: 1 1 220px;
    min-width: 0;
    padding: 0.95rem 1.1rem;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: #ffffff;
    background: rgba(245, 245, 250, 0.06);
    border: 1px solid rgba(245, 245, 250, 0.18);
    border-radius: 10px;
    outline: none;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.case-study-signup-form input[type="email"]::placeholder {
    color: rgba(245, 245, 250, 0.45);
}
.case-study-signup-form input[type="email"]:focus {
    border-color: rgba(140, 132, 216, 0.7);
    background: rgba(245, 245, 250, 0.1);
    box-shadow: 0 0 0 3px rgba(91, 79, 199, 0.25);
}
.case-study-signup-form input[type="email"].is-invalid {
    border-color: #f87171;
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}
.case-study-signup-form button[type="submit"] {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.95rem 1.5rem;
    background: var(--cs-violet);
    color: #ffffff;
    border: 1px solid var(--cs-violet);
    border-radius: 10px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 16px 36px -14px rgba(91, 79, 199, 0.55);
}
.case-study-signup-form button[type="submit"]:hover:not(:disabled) {
    background: var(--cs-violet-deep);
    transform: translateY(-2px);
    box-shadow: 0 22px 44px -14px rgba(91, 79, 199, 0.7);
}
.case-study-signup-form button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}
.case-study-signup-disclaimer {
    flex: 1 1 100%;
    margin: 0.25rem 0 0 0;
    font-size: 0.85rem;
    line-height: 1.4;
    color: rgba(245, 245, 250, 0.75);
}
.case-study-signup-disclaimer a {
    color: inherit;
    text-decoration: underline;
    text-underline-offset: 2px;
}
.case-study-signup-disclaimer a:hover { color: #ffffff; }
.case-study-signup-error {
    flex: 1 1 100%;
    margin: 0;
    color: #f87171;
    font-size: 0.85rem;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
    .case-study {
        padding: 2.25rem 1.4rem 2rem;
        border-radius: 18px;
    }
    .case-study-title { font-size: 1.7rem; }
    .case-study-lede { font-size: 1rem; }
    .case-study-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding-bottom: 1.5rem;
        margin-bottom: 2rem;
    }
    .case-study-logo { width: 68px; height: 68px; }
    .case-study-meta h2 { font-size: 1.25rem; }
    .case-study-hero-quote {
        font-size: 1.05rem;
        padding: 2.25rem 1.25rem 1.85rem;
        border-radius: 18px;
    }
    .case-study-quote-bottom blockquote {
        padding: 1.85rem 1.4rem 1.5rem;
        font-size: 1rem;
        border-radius: 16px;
    }
    .case-study-quote-bottom blockquote::after {
        font-size: 4rem;
        top: 0.2rem;
        right: 0.6rem;
    }
    .case-study-stats { grid-template-columns: 1fr; gap: 0.85rem; }
    .case-stat-value { font-size: 1.95rem; }
    .case-study-section h3 { font-size: 1.25rem; }
    .case-study-chart { padding: 1.1rem 0.75rem; }
    .case-study-estimate {
        padding: 2.25rem 1.1rem 1.25rem;
        margin-top: 1.5rem;
    }
    .case-study-estimate::before {
        left: 1.1rem;
        font-size: 0.62rem;
        padding-left: 1.65rem;
    }
    .case-study-estimate::after {
        left: 1.1rem;
        width: 1.3rem;
    }
    .case-chart-title { font-size: 0.7rem; }
    .case-study-payback {
        padding: 1.5rem 1.25rem;
        border-radius: 14px;
    }
    .case-study-payback p { font-size: 1.05rem; }
    .case-study-footer-card {
        padding: 2.25rem 1.25rem;
        border-radius: 18px;
    }
    .case-study-signup-form button[type="submit"] {
        width: 100%;
        justify-content: center;
    }
}