/* ========== SHARED CASE STUDY STYLES ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
    --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
    --radius-pill: 999px;
    --radius-md: 0.875rem;
    --radius-outer: 1.5rem;
}

[data-theme="dark"] {
    --bg: #07070a;
    --bg-elevated: #0e0e12;
    --bg-card: #131318;
    --bg-shell: rgba(255,255,255,0.025);
    --text-primary: #f2efe7;
    --text-secondary: #9a978f;
    --text-muted: #5a5851;
    --accent-warm: #d9b066;
    --accent-cool: #8db5a2;
    --hairline: rgba(255,255,255,0.07);
    --hairline-strong: rgba(255,255,255,0.12);
    --nav-glass: rgba(15,15,18,0.55);
    --selection-bg: #8db5a2;
    --selection-fg: #07070a;
    --ambient: 0 30px 60px -30px rgba(0,0,0,0.6);
}

[data-theme="light"] {
    --bg: #faf7f1;
    --bg-elevated: #f3ede2;
    --bg-card: #ffffff;
    --bg-shell: rgba(60,40,20,0.04);
    --text-primary: #1a1714;
    --text-secondary: #5e564c;
    --text-muted: #a39a8b;
    --accent-warm: #9a6f2a;
    --accent-cool: #4f7a68;
    --hairline: rgba(40,30,20,0.08);
    --hairline-strong: rgba(40,30,20,0.14);
    --nav-glass: rgba(250,247,241,0.65);
    --selection-bg: #4f7a68;
    --selection-fg: #faf7f1;
    --ambient: 0 30px 60px -32px rgba(60,40,20,0.18);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    transition: background 0.5s var(--ease-spring), color 0.5s var(--ease-spring);
}
::selection { background: var(--selection-bg); color: var(--selection-fg); }
a { color: var(--accent-cool); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--accent-warm); }
img { max-width: 100%; display: block; }

/* Nav */
.nav-shell {
    position: fixed; top: 1.5rem; left: 0; right: 0; z-index: 100;
    display: flex; justify-content: center; padding: 0 1.5rem; pointer-events: none;
}
nav {
    pointer-events: auto;
    display: flex; align-items: center; gap: 1.25rem;
    padding: 0.55rem 0.55rem 0.55rem 1.5rem;
    background: var(--nav-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-pill);
    box-shadow: 0 30px 60px -30px rgba(0,0,0,0.4);
}
.nav-logo {
    display: flex; align-items: center; gap: 0.6rem;
    font-weight: 600; font-size: 0.95rem; letter-spacing: 0.06em;
    text-transform: uppercase; color: var(--text-primary);
}
.nav-logo img { height: 26px; }
.back-link {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.45rem 1rem 0.45rem 0.85rem;
    border-radius: var(--radius-pill);
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    font-size: 0.8rem; font-weight: 500;
    color: var(--text-primary);
    transition: background 0.4s var(--ease-spring);
}
.back-link:hover { background: var(--hairline-strong); color: var(--text-primary); }
.back-link svg { width: 14px; height: 14px; }
.theme-toggle, .lang-toggle {
    border-radius: var(--radius-pill);
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    cursor: pointer;
    color: var(--text-primary);
    transition: background 0.4s var(--ease-spring);
    font-family: inherit;
}
.theme-toggle:hover, .lang-toggle:hover { background: var(--hairline-strong); }
.theme-toggle {
    width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.theme-toggle svg {
    width: 16px; height: 16px; position: absolute;
    transition: transform 0.6s var(--ease-spring), opacity 0.4s var(--ease-spring);
}
[data-theme="dark"] .theme-toggle .icon-sun { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.6); }
[data-theme="light"] .theme-toggle .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.6); }
[data-theme="light"] .theme-toggle .icon-moon { opacity: 1; transform: rotate(0) scale(1); }
.lang-toggle {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.66rem; letter-spacing: 0.12em;
    font-weight: 500; color: var(--text-muted);
    text-transform: uppercase;
}
.lang-toggle .sep { opacity: 0.4; }
[data-lang="en"] .lang-toggle [data-l="en"] { color: var(--text-primary); }
[data-lang="es"] .lang-toggle [data-l="es"] { color: var(--text-primary); }

/* i18n visibility */
[lang="en"], [lang="es"] { display: block; }
[data-lang="en"] [lang="es"], [data-lang="es"] [lang="en"] { display: none; }

/* Case study layout */
main { padding-top: 7rem; padding-bottom: 4rem; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

.case-hero { padding: 3rem 0 4rem; }
.case-eyebrow {
    display: inline-flex; align-items: center; gap: 0.65rem;
    padding: 0.35rem 0.85rem 0.35rem 0.5rem;
    border-radius: var(--radius-pill);
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    font-family: var(--font-mono);
    font-size: 0.68rem; color: var(--text-secondary);
    letter-spacing: 0.18em; text-transform: uppercase;
    font-weight: 500; margin-bottom: 2rem;
}
.case-eyebrow .dot {
    width: 6px; height: 6px; border-radius: var(--radius-pill);
    background: var(--accent-cool);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-cool) 25%, transparent);
}
.case-hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 400; line-height: 1.02;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
}
.case-tagline {
    font-size: 1.3rem; color: var(--text-secondary);
    max-width: 720px; line-height: 1.5;
    font-weight: 400;
}
.case-meta-row {
    display: flex; flex-wrap: wrap;
    gap: 1.5rem 2.5rem;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--hairline);
}
.case-meta-item {
    display: flex; flex-direction: column; gap: 0.35rem;
}
.case-meta-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-weight: 600;
}
.case-meta-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}
.case-meta-value a {
    color: var(--accent-cool);
    display: inline-flex; align-items: center; gap: 0.4rem;
}
.case-meta-value a svg { width: 12px; height: 12px; }

/* Big mockup */
.case-showcase {
    margin: 2rem 0 5rem;
    padding: 8px;
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-outer);
    box-shadow: var(--ambient);
}
.case-showcase-inner {
    border-radius: calc(var(--radius-outer) - 8px);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16/10;
}

/* Sections */
.case-section { padding: 3rem 0; border-top: 1px solid var(--hairline); }
.case-section h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 400; line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}
.case-section h2 em { font-style: normal; }
.case-section p {
    font-size: 1.1rem; color: var(--text-secondary);
    line-height: 1.75; max-width: 720px;
    margin-bottom: 1.2rem;
}
.case-section p strong { color: var(--text-primary); font-weight: 600; }

/* Two column */
.case-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem 4rem;
    align-items: start;
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-top: 2rem;
}
.feature-card {
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    border-radius: 1rem;
    padding: 1.5rem 1.75rem;
}
.feature-card h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}
.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Tech stack chips */
.tech-stack {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    list-style: none;
    margin-top: 1.5rem;
}
.tech-stack li {
    padding: 0.4rem 0.85rem;
    background: var(--bg-shell);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-pill);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

/* CTA strip */
.case-cta {
    margin-top: 4rem; padding: 3rem 0 0;
    border-top: 1px solid var(--hairline);
    text-align: center;
}
.case-cta h3 {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--text-primary);
}
.case-cta p {
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 2rem;
}
.pill-cta {
    display: inline-flex; align-items: center; gap: 0.85rem;
    padding: 0.55rem 0.55rem 0.55rem 1.5rem;
    border-radius: var(--radius-pill);
    background: var(--text-primary);
    color: var(--bg);
    font-size: 0.92rem;
    font-weight: 600;
    transition: transform 0.4s var(--ease-spring);
}
.pill-cta:hover { transform: translateY(-2px); color: var(--bg); }
.pill-cta .nub {
    width: 34px; height: 34px;
    border-radius: var(--radius-pill);
    background: var(--bg); color: var(--text-primary);
    display: inline-flex; align-items: center; justify-content: center;
    transition: transform 0.55s var(--ease-spring);
}
.pill-cta:hover .nub { transform: translateX(3px); }
.pill-cta .nub svg { width: 14px; height: 14px; }

/* Footer */
.case-footer {
    border-top: 1px solid var(--hairline);
    padding: 2.5rem 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4rem;
}

@media (max-width: 768px) {
    .nav-shell { top: 1rem; padding: 0 1rem; }
    nav { padding: 0.5rem 0.5rem 0.5rem 1rem; gap: 0.6rem; }
    .nav-logo { font-size: 0.85rem; }
    .nav-logo img { height: 22px; }
    .back-link span { display: none; }
    .back-link { padding: 0.4rem 0.7rem; }
    .container { padding: 0 1.25rem; }
    main { padding-top: 6rem; padding-bottom: 2.5rem; }

    .case-hero { padding: 1.5rem 0 2rem; }
    .case-eyebrow { margin-bottom: 1.5rem; font-size: 0.62rem; }
    .case-hero h1 { margin-bottom: 1rem; }
    .case-tagline { font-size: 1.05rem; line-height: 1.55; }
    .case-meta-row { gap: 1rem 1.5rem; margin-top: 2rem; padding-top: 1.5rem; }
    .case-meta-value { font-size: 0.9rem; }

    .case-section { padding: 2.5rem 0; }
    .case-section p { font-size: 1rem; line-height: 1.7; margin-bottom: 1rem; }
    .case-two-col { grid-template-columns: 1fr; gap: 2rem; }

    .feature-grid { grid-template-columns: 1fr; gap: 0.85rem; margin-top: 1.5rem; }
    .feature-card { padding: 1.25rem 1.35rem; }
    .feature-card h3 { font-size: 1.15rem; }

    .case-cta { margin-top: 2.5rem; padding-top: 2.5rem; }
    .case-cta h3 { font-size: 1.7rem; }
    .case-cta p { font-size: 0.95rem; }

    .case-footer { padding: 2rem 1.25rem; margin-top: 3rem; }

    /* Scale-down embedded showcases for narrow viewports.
       Render at the original desktop design size (880×550) and use a
       container query + transform scale to fit the available inline width.
       Keeps every animation's choreography, fonts, and layout intact. */
    .case-showcase {
        padding: 4px;
        margin: 1.5rem 0 3rem;
        border-radius: 1.1rem;
    }
    .case-showcase-inner {
        aspect-ratio: auto;
        container-type: inline-size;
        height: 0;
        padding-bottom: 62.5%;
        border-radius: calc(1.1rem - 4px);
    }
    .case-showcase-inner > * {
        position: absolute !important;
        top: 0; left: 0;
        width: 880px !important;
        height: 550px !important;
        transform-origin: top left;
        transform: scale(calc(100cqi / 880px));
    }
}