/* =========================================================
   Layout
   ========================================================= */

.guide-wrap {
    max-width: 980px;
    margin: 2rem auto;
}


/* =========================================================
   Hero
   ========================================================= */

.guide-hero {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 22px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.guide-hero__eyebrow {
    display: inline-block;
    margin-bottom: .5rem;
    color: #2563eb;
    font-size: .8rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.guide-hero h1 {
    margin: 0;
    color: #0f172a;
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 900;
    line-height: 1.05;
}

.guide-hero p {
    max-width: 760px;
    margin: .75rem 0 0;
    color: #475569;
    font-size: 1.12rem;
    line-height: 1.65;
}


/* =========================================================
   Cards
   ========================================================= */

.guide-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 18px;
    padding: 1.5rem;
    margin: 1rem 0;
}

    .guide-card h2 {
        margin: 0 0 .75rem;
        color: #1e3a5f;
        font-size: 1.6rem;
        font-weight: 850;
    }

    .guide-card h3 {
        margin: 1rem 0 .4rem;
        color: #0f172a;
        font-size: 1.15rem;
        font-weight: 800;
    }

    .guide-card p,
    .guide-card li {
        color: #475569;
        font-size: 1.05rem;
        line-height: 1.7;
    }

    .guide-card ul,
    .guide-card ol {
        margin-bottom: 0;
        padding-left: 1.25rem;
    }


/* =========================================================
   Callouts
   ========================================================= */

.guide-callout,
.guide-warning {
    border-radius: 16px;
    padding: 1rem;
    font-weight: 700;
}

.guide-callout {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e3a8a;
}

.guide-warning {
    background: #fff7ed;
    border: 1px solid #fed7aa;
    color: #9a3412;
}


/* =========================================================
   Grids
   ========================================================= */

.guide-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.guide-grid--stacked {
    grid-template-columns: 1fr;
}

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


/* =========================================================
   Mini Cards
   ========================================================= */

.guide-mini {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 1rem;
}

    .guide-mini h3 {
        margin-top: 0;
    }

.guide-mini--media {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.guide-mini__content {
    flex: 1;
}

.guide-icon {
    display: block;
    width: 144px;
    height: 144px;
    object-fit: contain;
    flex: 0 0 144px;
}

.guide-mini--media .guide-icon {
    margin-bottom: 0;
}


/* =========================================================
   Links
   ========================================================= */

.guide-links {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1rem;
}

    .guide-links a {
        color: #1d4ed8;
        font-weight: 800;
        text-decoration: none;
    }

        .guide-links a:hover {
            color: #1e40af;
        }


/* =========================================================
   Formulas
   ========================================================= */

.guide-formula {
    display: grid;
    gap: 0.5rem;
    margin: 1rem 0;
    padding: 1rem;
    border-radius: 14px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    color: #0f172a;
}


/* =========================================================
   Calculator
   ========================================================= */

.measurement-calculator {
    display: grid;
    gap: 1rem;
    max-width: 640px;
    margin-top: 1rem;
}

.calc-field label {
    display: block;
    margin-bottom: 0.35rem;
    color: #0f172a;
    font-weight: 800;
}

.calc-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calc-input-icon {
    width: 80px;
    height: 80px;
    object-fit: contain;
    flex: 0 0 80px;
}

.calc-input-row input,
.calc-input-row select {
    min-height: 42px;
    border: 1px solid #eab308;
    border-radius: 10px;
    background: #fefce8;
    padding: 0.55rem 0.65rem;
    font-size: 1rem;
}

.calc-input-row input {
    width: 100px;
    flex: 0 0 100px;
}

.calc-input-row select {
    width: auto;
    flex: 0 0 auto;
}

.calc-input-row span {
    min-width: 44px;
    color: #334155;
    font-weight: 800;
}

.calc-button {
    min-height: 48px;
    font-weight: 800;
}

.calc-error {
    padding: 0.75rem;
    border-radius: 10px;
    background: #fee2e2;
    color: #991b1b;
    font-weight: 700;
}


/* =========================================================
   Calculator Result
   ========================================================= */

.calc-result {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

    .calc-result div {
        padding: 0.85rem;
        border: 1px solid #bfdbfe;
        border-radius: 14px;
        background: #eff6ff;
    }

    .calc-result span {
        display: block;
        margin-bottom: 0.25rem;
        color: #475569;
        font-size: 0.9rem;
    }

    .calc-result b {
        color: #0f172a;
        font-size: 1.1rem;
    }

.calc-result--single {
    grid-template-columns: 1fr;
}

    .calc-result--single div {
        padding: 1.25rem;
        border: 1px solid #badbcc;
        border-radius: 14px;
        background: #d1e7dd;
    }

    .calc-result--single span {
        color: #0f5132;
        font-size: 1rem;
        font-weight: 800;
    }

    .calc-result--single b {
        display: block;
        color: #0f5132;
        font-size: clamp(2rem, 5vw, 3rem);
        font-weight: 900;
        line-height: 1.1;
    }

.guide-note {
    margin-top: 1rem;
    color: #64748b;
    font-size: 0.95rem;
}


/* =========================================================
   Mobile
   ========================================================= */

@media (max-width: 767.98px) {
    .guide-wrap {
        margin: 2rem auto;
    }

    .guide-hero,
    .guide-card {
        padding: 1.1rem;
        border-radius: 16px;
        margin: 1rem 0;
    }

    .guide-grid,
    .guide-grid--two,
    .calc-result {
        grid-template-columns: 1fr;
    }

    .guide-mini--media {
        gap: 0.85rem;
    }

    .guide-icon {
        width: 120px;
        height: 120px;
        flex-basis: 120px;
    }

    .calc-input-icon {
        width: 64px;
        height: 64px;
        flex-basis: 64px;
    }

    .calc-input-row {
        align-items: center;
    }
}

.guide-header {background-color: white; border-radius: 20px; margin: 0px; padding: 15px;}