/* =========================================================
   COMPONENT RESET
========================================================= */

#megaAirflowCalculator,
#megaAirflowCalculator * {
    box-sizing: border-box;
}

#megaAirflowCalculator {
    --mega-blue: #1677ff;
    --mega-blue-soft: #eef6ff;
    --mega-navy: #071b3a;
    --mega-text: #18324f;
    --mega-muted: #66758a;
    --mega-border: #d9e4ef;
    --mega-panel: #f7f9fc;
    --mega-white: #ffffff;

    width: 100%;
    max-width: 100%;
    margin: 28px 0;
    color: var(--mega-navy);
    font-family:
        Inter,
        Arial,
        Helvetica,
        sans-serif;

    container-type: inline-size;
}


/* =========================================================
   HEADER
========================================================= */

#megaAirflowCalculator .mega-calc-header {
    margin-bottom: 22px;
}

#megaAirflowCalculator .mega-calc-eyebrow {
    margin-bottom: 8px;

    color: var(--mega-blue);

    font-size: 12px;
    font-weight: 800;

    letter-spacing: .13em;
}

#megaAirflowCalculator .mega-calc-title {
    margin: 0;

    color: var(--mega-navy);

    font-size: clamp(26px, 4cqw, 34px);
    line-height: 1.12;

    font-weight: 800;
    letter-spacing: -.025em;
}

#megaAirflowCalculator .mega-calc-description {
    max-width: 760px;

    margin: 10px 0 0;

    color: var(--mega-muted);

    font-size: 14px;
    line-height: 1.65;
}

#megaAirflowCalculator .mega-calc-divider {
    height: 1px;

    margin: 19px 0 20px;

    background: #e4ebf3;
}


/* =========================================================
   MAIN TWO COLUMN LAYOUT
========================================================= */

#megaAirflowCalculator .mega-calc-layout {
    display: grid;

    grid-template-columns:
        minmax(215px, 35%)
        minmax(0, 65%);

    gap: 24px;

    align-items: start;
}

#megaAirflowCalculator .mega-calc-layout > * {
    min-width: 0;
}


/* =========================================================
   LEFT INPUT PANEL
========================================================= */

#megaAirflowCalculator .mega-input-panel {
    align-self: start;

    padding: 20px;

    background: var(--mega-panel);

    border: 1px solid var(--mega-border);
    border-radius: 20px;
}

#megaAirflowCalculator .mega-panel-title {
    margin: 0 0 20px;

    font-size: 16px;
    line-height: 1.2;

    font-weight: 800;
}

#megaAirflowCalculator .mega-field {
    margin-bottom: 19px;
}

#megaAirflowCalculator .mega-field:last-child {
    margin-bottom: 0;
}

#megaAirflowCalculator .mega-field-heading {
    display: flex;

    align-items: flex-start;
    justify-content: space-between;

    gap: 10px;

    margin-bottom: 7px;
}

#megaAirflowCalculator .mega-field-label {
    color: var(--mega-text);

    font-size: 13px;
    line-height: 1.25;

    font-weight: 700;
}

#megaAirflowCalculator .mega-field-help {
    flex: 0 0 auto;

    color: #7a8ca2;

    font-size: 10px;
    line-height: 1.1;

    text-align: right;
}

#megaAirflowCalculator .mega-input-box {
    position: relative;
}

#megaAirflowCalculator .mega-number-input {
    display: block;

    width: 100%;
    height: 44px;

    padding: 0 45px 0 13px;

    color: var(--mega-navy);

    background: var(--mega-white);

    border: 1px solid #cbd8e6;
    border-radius: 11px;

    outline: none;

    font: inherit;
    font-size: 14px;
    font-weight: 750;
}

#megaAirflowCalculator .mega-number-input:focus {
    border-color: var(--mega-blue);

    box-shadow:
        0 0 0 3px rgba(22, 119, 255, .10);
}

#megaAirflowCalculator .mega-input-unit {
    position: absolute;

    top: 50%;
    right: 12px;

    transform: translateY(-50%);

    color: #788aa0;

    font-size: 11px;

    pointer-events: none;
}


/* =========================================================
   MARGIN
========================================================= */

#megaAirflowCalculator .mega-margin-row {
    display: flex;

    align-items: center;
    justify-content: space-between;

    margin-bottom: 8px;
}

#megaAirflowCalculator .mega-margin-value {
    color: var(--mega-blue);

    font-size: 14px;
    font-weight: 800;
}

#megaAirflowCalculator input[type="range"] {
    display: block;

    width: 100%;

    margin: 0;

    accent-color: var(--mega-blue);
}

#megaAirflowCalculator .mega-range-scale {
    display: flex;

    justify-content: space-between;

    margin-top: 6px;

    color: #8190a3;

    font-size: 9px;
}


/* =========================================================
   RIGHT CALCULATION AREA
========================================================= */

#megaAirflowCalculator .mega-result-area {
    min-width: 0;
}


/* =========================================================
   TOP INPUT VISUAL
========================================================= */

#megaAirflowCalculator .mega-equation-inputs {
    display: grid;

    grid-template-columns:
        minmax(0, 1fr)
        34px
        minmax(0, 1fr);

    gap: 8px;

    align-items: center;
}

#megaAirflowCalculator .mega-live-card {
    min-width: 0;

    min-height: 96px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 12px 8px;

    text-align: center;

    background: #f8fbff;

    border: 1px solid var(--mega-border);
    border-radius: 15px;
}

#megaAirflowCalculator .mega-live-label {
    min-height: 26px;

    display: flex;
    align-items: center;
    justify-content: center;

    color: #61748c;

    font-size: 10px;
    line-height: 1.15;

    font-weight: 800;
    letter-spacing: .07em;
}

#megaAirflowCalculator .mega-live-number {
    margin-top: 7px;

    color: var(--mega-blue);

    font-size: clamp(26px, 5cqw, 34px);
    line-height: 1;

    font-weight: 850;

    white-space: nowrap;
}

#megaAirflowCalculator .mega-divide-symbol {
    color: #8193a8;

    font-size: 27px;
    line-height: 1;

    font-weight: 700;

    text-align: center;
}


/* =========================================================
   FORMULA
========================================================= */

#megaAirflowCalculator .mega-formula-card {
    margin-top: 14px;

    padding: 15px 12px;

    text-align: center;

    background: var(--mega-blue-soft);

    border: 1px solid #bfd9ff;
    border-radius: 15px;
}

#megaAirflowCalculator .mega-formula-label {
    margin-bottom: 7px;

    color: #55708f;

    font-size: 9px;
    font-weight: 800;

    letter-spacing: .10em;
}

#megaAirflowCalculator .mega-formula-value {
    color: var(--mega-navy);

    font-size: clamp(17px, 3cqw, 22px);
    line-height: 1.25;

    font-weight: 850;

    white-space: nowrap;
}


/* =========================================================
   MAIN RESULT FLOW
========================================================= */

#megaAirflowCalculator .mega-main-results {
    display: grid;

    grid-template-columns:
        minmax(118px, .85fr)
        minmax(78px, .55fr)
        minmax(170px, 1.3fr);

    gap: 10px;

    align-items: center;

    margin-top: 16px;
}

#megaAirflowCalculator .mega-base-result {
    min-width: 0;

    min-height: 108px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 15px 10px;

    text-align: center;

    background: #f8fafc;

    border: 1px solid var(--mega-border);
    border-radius: 15px;
}

#megaAirflowCalculator .mega-result-label {
    color: #61748c;

    font-size: 9px;
    line-height: 1.2;

    font-weight: 800;

    letter-spacing: .07em;
}

#megaAirflowCalculator .mega-base-number {
    margin-top: 13px;

    color: var(--mega-navy);

    font-size: clamp(23px, 4cqw, 30px);
    line-height: 1;

    font-weight: 850;

    white-space: nowrap;
}


/* =========================================================
   RESULT ARROW
========================================================= */

#megaAirflowCalculator .mega-margin-arrow {
    min-width: 0;

    text-align: center;
}

#megaAirflowCalculator .mega-margin-arrow-label {
    margin-bottom: 7px;

    color: var(--mega-blue);

    font-size: 8px;
    line-height: 1.25;

    font-weight: 850;

    text-transform: uppercase;
}

#megaAirflowCalculator .mega-arrow-line {
    position: relative;

    width: calc(100% - 8px);
    height: 3px;

    margin: auto;

    background: var(--mega-blue);

    border-radius: 99px;
}

#megaAirflowCalculator .mega-arrow-line::after {
    content: "";

    position: absolute;

    top: 50%;
    right: -7px;

    transform: translateY(-50%);

    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 9px solid var(--mega-blue);
}


/* =========================================================
   FINAL RESULT
========================================================= */

#megaAirflowCalculator .mega-final-result {
    min-width: 0;

    min-height: 108px;

    display: flex;
    flex-direction: column;

    align-items: center;
    justify-content: center;

    padding: 15px 10px;

    text-align: center;

    background: var(--mega-blue);

    border-radius: 17px;
}

#megaAirflowCalculator .mega-final-label {
    max-width: 170px;

    color: #e2eeff;

    font-size: 9px;
    line-height: 1.2;

    font-weight: 800;

    letter-spacing: .06em;
}

#megaAirflowCalculator .mega-final-number {
    max-width: 100%;

    margin-top: 12px;

    color: #ffffff;

    font-size: clamp(25px, 4.8cqw, 34px);
    line-height: 1;

    font-weight: 900;

    letter-spacing: -.02em;

    white-space: nowrap;
}


/* =========================================================
   SECONDARY RESULTS
========================================================= */

#megaAirflowCalculator .mega-secondary-results {
    display: grid;

    grid-template-columns: repeat(3, minmax(0, 1fr));

    gap: 9px;

    margin-top: 14px;
}

#megaAirflowCalculator .mega-secondary-card {
    min-width: 0;

    min-height: 82px;

    padding: 12px 9px;

    background: #ffffff;

    border: 1px solid var(--mega-border);
    border-radius: 13px;
}

#megaAirflowCalculator .mega-secondary-label {
    min-height: 25px;

    color: #73859a;

    font-size: 9px;
    line-height: 1.2;
}

#megaAirflowCalculator .mega-secondary-value {
    margin-top: 7px;

    color: var(--mega-navy);

    font-size: clamp(15px, 2.5cqw, 19px);
    line-height: 1.15;

    font-weight: 850;

    overflow-wrap: anywhere;
}


/* =========================================================
   ENGINEERING PROCESS
========================================================= */

#megaAirflowCalculator .mega-process {
    display: flex;

    align-items: center;
    justify-content: center;

    flex-wrap: wrap;

    gap: 6px;

    margin-top: 15px;
}

#megaAirflowCalculator .mega-process-step {
    padding: 6px 10px;

    color: #385370;

    background: #f7faff;

    border: 1px solid #d7e2ee;
    border-radius: 999px;

    font-size: 9px;
    line-height: 1;
    font-weight: 650;

    white-space: nowrap;
}

#megaAirflowCalculator .mega-process-arrow {
    color: #8ba0b6;

    font-size: 11px;
}


/* =========================================================
   NOTE
========================================================= */

#megaAirflowCalculator .mega-engineering-note {
    margin-top: 22px;

    padding: 14px 16px;

    color: #5c7087;

    background: #f7f9fc;

    border-left: 3px solid var(--mega-blue);
    border-radius: 7px 13px 13px 7px;

    font-size: 11px;
    line-height: 1.55;
}

#megaAirflowCalculator .mega-engineering-note strong {
    color: var(--mega-navy);
}


/* =========================================================
   VALIDATION
========================================================= */

#megaAirflowCalculator .mega-error {
    display: none;

    margin-top: 13px;

    padding: 9px 11px;

    color: #9d3030;

    background: #fff5f5;

    border: 1px solid #f0cccc;
    border-radius: 9px;

    font-size: 11px;
}



@container (max-width: 820px) {

    /* -----------------------------------------
       Main layout becomes vertical
    ----------------------------------------- */

    #megaAirflowCalculator .mega-calc-layout {
        display: block;
    }

    /* -----------------------------------------
       Design Conditions
       Full width, compact horizontal layout
    ----------------------------------------- */

    #megaAirflowCalculator .mega-input-panel {
        width: 100%;
        padding: 20px;
        margin-bottom: 20px;
    }

    #megaAirflowCalculator .mega-panel-title {
        margin-bottom: 18px;
    }

    #megaAirflowCalculator .mega-input-fields-grid {
        display: grid;

        grid-template-columns:
            repeat(3, minmax(0, 1fr));

        gap: 14px 16px;
    }

    #megaAirflowCalculator .mega-field {
        margin: 0;
        min-width: 0;
    }

    #megaAirflowCalculator .mega-margin-field {
        grid-column: 1 / -1;
    }

    #megaAirflowCalculator .mega-number-input {
        width: 100%;
    }

    /* -----------------------------------------
       Calculation area
    ----------------------------------------- */

    #megaAirflowCalculator .mega-result-area {
        width: 100%;
        min-width: 0;
    }

    /* -----------------------------------------
       Heat Load ÷ Delta T
    ----------------------------------------- */

    #megaAirflowCalculator .mega-equation-inputs {
        display: grid;

        grid-template-columns:
            minmax(0, 1fr)
            42px
            minmax(0, 1fr);

        gap: 12px;

        width: 100%;
    }

    #megaAirflowCalculator .mega-live-card {
        min-height: 100px;
    }

    #megaAirflowCalculator .mega-live-number {
        font-size: 32px;
    }

    /* -----------------------------------------
       Formula
    ----------------------------------------- */

    #megaAirflowCalculator .mega-formula-card {
        width: 100%;

        margin-top: 14px;

        padding: 18px 16px;
    }

    #megaAirflowCalculator .mega-formula-value {
        font-size: 22px;

        white-space: nowrap;
    }

    /* -----------------------------------------
       BASE → MARGIN → FINAL

       Important:
       Give final result enough real width.
    ----------------------------------------- */

    #megaAirflowCalculator .mega-main-results {
        display: grid;

        grid-template-columns:
            minmax(175px, 0.9fr)
            115px
            minmax(235px, 1.25fr);

        gap: 14px;

        width: 100%;

        margin-top: 16px;

        align-items: center;
    }

    #megaAirflowCalculator .mega-base-result,
    #megaAirflowCalculator .mega-final-result {
        width: 100%;
        min-width: 0;
        min-height: 112px;
    }

    #megaAirflowCalculator .mega-base-number {
        font-size: 29px;
    }

    #megaAirflowCalculator .mega-final-number {
        font-size: 34px;

        white-space: nowrap;

        max-width: none;
    }

    #megaAirflowCalculator .mega-final-label {
        max-width: none;
    }

    /* -----------------------------------------
       Margin arrow
    ----------------------------------------- */

    #megaAirflowCalculator .mega-margin-arrow {
        width: 100%;
        min-width: 0;
    }

    #megaAirflowCalculator .mega-margin-arrow-label {
        font-size: 8px;

        white-space: normal;
    }

    /* -----------------------------------------
       Secondary results
    ----------------------------------------- */

    #megaAirflowCalculator .mega-secondary-results {
        display: grid;

        grid-template-columns:
            repeat(3, minmax(0, 1fr));

        gap: 12px;

        width: 100%;

        margin-top: 14px;
    }

    #megaAirflowCalculator .mega-secondary-card {
        width: 100%;
        min-width: 0;

        padding: 14px;
    }

    #megaAirflowCalculator .mega-secondary-value {
        font-size: 18px;

        white-space: nowrap;

        overflow: visible;

        word-break: normal;
    }

    /* -----------------------------------------
       Engineering process
    ----------------------------------------- */

    #megaAirflowCalculator .mega-process {
        width: 100%;

        margin-top: 17px;

        justify-content: center;

        gap: 7px;
    }

}

/* =========================================================
   NARROW ARTICLE / TABLET
========================================================= */

@container (max-width: 650px) {

    #megaAirflowCalculator .mega-input-fields-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    #megaAirflowCalculator .mega-margin-field {
        grid-column: 1 / -1;
    }

    #megaAirflowCalculator .mega-main-results {
        grid-template-columns:
            minmax(145px, 0.85fr)
            85px
            minmax(190px, 1.2fr);

        gap: 10px;
    }

    #megaAirflowCalculator .mega-base-number {
        font-size: 25px;
    }

    #megaAirflowCalculator .mega-final-number {
        font-size: 29px;
    }

    #megaAirflowCalculator .mega-secondary-value {
        font-size: 16px;
    }

}

/* =========================================================
   MOBILE
========================================================= */

@container (max-width: 480px) {

    #megaAirflowCalculator .mega-input-fields-grid {
        grid-template-columns: 1fr;
    }

    #megaAirflowCalculator .mega-equation-inputs {
        grid-template-columns: 1fr;
    }

    #megaAirflowCalculator .mega-divide-symbol {
        padding: 2px 0;
    }

    #megaAirflowCalculator .mega-formula-value {
        white-space: normal;

        font-size: 19px;
    }

    #megaAirflowCalculator .mega-main-results {
        grid-template-columns: 1fr;

        gap: 12px;
    }

    #megaAirflowCalculator .mega-margin-arrow {
        display: flex;

        flex-direction: column;

        align-items: center;

        padding: 5px 0;
    }

    #megaAirflowCalculator .mega-arrow-line {
        width: 3px;
        height: 34px;
    }

    #megaAirflowCalculator .mega-arrow-line::after {
        top: auto;
        right: 50%;
        bottom: -8px;

        transform: translateX(50%);

        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-top: 9px solid var(--mega-blue);
        border-bottom: 0;
    }

    #megaAirflowCalculator .mega-secondary-results {
        grid-template-columns: 1fr;
    }

    #megaAirflowCalculator .mega-secondary-card {
        min-height: 70px;
    }

    #megaAirflowCalculator .mega-final-number {
        font-size: 34px;
    }

}