:root {
    --color-hero-gradient-start: #A94F37;
    --color-page-background: #F7B368;


    --color-surface: #FFFDF9;
    --color-hero-gradient-end: #C56C4F;
    --color-soft-panel-start: #F5E8DD;
    --color-soft-panel-end: #F9EFE7;
    --color-text-main: #34251F;
    --color-text-muted: #705B50;
    --color-primary: #A94F37;
    --color-primary-soft: #F3DED5;
    --color-on-primary: #FFFFFF;
    --color-border: #E7D7CB;
    --color-card-shadow: rgba(52, 37, 31, 0.10);
    --color-habit-eating-background: #FBE5D7;
    --color-habit-exercise-background: #E4F0E3;
    --color-habit-sleep-background: #E8E6F5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Nunito", sans-serif;
    background-color: var(--color-page-background);
    color: var(--color-text-main);
    line-height: 1.6;
}

img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

ul {
    list-style: none;
}


[hidden] {
    display: none !important;
}

/* HELPERS*/
.page-container {
    width: 100%;
    max-width: 1120px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

.page-section {
    padding-top: 48px;
    padding-bottom: 48px;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.section-text {
    margin-top: 16px;
    color: var(--color-text-muted);
}

.image-box {
    overflow: hidden;
    flex-shrink: 0;
    border-radius: 12px;
}

.icon-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.bmi-card,
.limitation-card {
    background-color: var(--color-surface);
    box-shadow: 0 16px 40px var(--color-card-shadow);
}

.two-column-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    align-items: center;
}

.two-column-section__text,
.two-column-section__image-box {
    min-width: 0;

}

.two-column-section__image-box {
    aspect-ratio: 1.45;
    border-radius: 24px;
    background-color: var(--color-primary-soft);

}

/*4. HERO*/
.hero-section__intro {
    padding-top: 32px;
    padding-bottom: 150px;
    text-align: center;
    background-image: linear-gradient(to bottom right, var(--color-hero-gradient-start), var(--color-hero-gradient-end));
    border-radius: 0 0 32px 32px;
}

.hero-section__logo-box {
    width: 40px;
    height: 40px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 50%;
}

.hero-section__title {
    margin-top: 24px;
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-section__description {
    margin-top: 20px;
    color: var(--color-text-main);
}

.hero-section__card-wrapper {
    margin-top: -110px;
}

/*5. CALCULATOR CARD*/
.bmi-card {
    padding: 24px;
    border-radius: 16px;
}

.bmi-card__title {
    font-size: 1.25rem;
    font-weight: 700;
}

/* Metric / Imperial radios */
.unit-switch {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.unit-switch__option {
    display: flex;
    align-items: center;
    flex: 1;
    gap: 16px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
}

.unit-switch__radio {
    -webkit-appearance: none;
    appearance: none;
    flex-shrink: 0;
    width: 31px;
    height: 31px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background-color: var(--color-surface);
    cursor: pointer;
}

.unit-switch__radio:checked {
    border: 8px solid var(--color-primary-soft);
    background-color: var(--color-primary);
}

.measurement-fields {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 24px;
}

.measurement-fields--imperial {
    display: none;
}

.bmi-card:has(.unit-switch__radio--imperial:checked) .measurement-fields--metric {
    display: none;
}

.bmi-card:has(.unit-switch__radio--imperial:checked) .measurement-fields--imperial {
    display: flex;
}

.measurement-group__label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.measurement-group__inputs {
    display: flex;
    gap: 16px;
}

.measurement-input-box {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
    padding: 16px 20px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.measurement-input-box:focus-within {
    border-color: var(--color-primary);
}

.measurement-input-box__input {
    flex: 1;
    min-width: 0;
    width: 100%;
    border: none;
    outline: none;
    background-color: transparent;
    font: inherit;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-main);
}

.measurement-input-box__input::-webkit-outer-spin-button,
.measurement-input-box__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.measurement-input-box__input {
    -moz-appearance: textfield;
}

.measurement-input-box__unit {
    margin-left: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* Result panel */
.bmi-result-panel {
    margin-top: 24px;
    padding: 24px;
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: 16px;
}

.bmi-welcome__title {
    font-size: 1.5rem;
    font-weight: 700;
}

.bmi-welcome__text {
    margin-top: 8px;
    font-size: 0.9rem;
}

.bmi-result-output {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bmi-result-output__label {
    font-weight: 600;
}

.bmi-result-output__value {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
}

.bmi-result-output__summary {
    font-size: 0.9rem;
}

/* RESULT MEANING + HABITS*/
.habits-panel {
    padding: 32px 24px;
    background-image: linear-gradient(to bottom right, var(--color-soft-panel-start), var(--color-soft-panel-end));
    border-radius: 24px;
}

.habit-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* Mobile: icon above text */
.habit-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.habit-card__icon-circle--eating {
    background-color: var(--color-habit-eating-background);
}

.habit-card__icon-circle--exercise {
    background-color: var(--color-habit-exercise-background);
}

.habit-card__icon-circle--sleep {
    background-color: var(--color-habit-sleep-background);
}

.habit-card__icon {
    font-size: 24px;
    color: var(--color-text-main);
}

.habit-card__title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.habit-card__description {
    margin-top: 8px;
    color: var(--color-text-muted);
}

/*LIMITATIONS*/

.limitations-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
}

.limitations-grid__intro {
    text-align: center;
}

.limitation-card {
    min-width: 0;
    padding: 24px;
    border-radius: 16px;
}

.limitation-card__header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.limitation-card__icon {
    font-size: 24px;
    color: var(--color-primary);
}

.limitation-card__title {
    font-size: 1.1rem;
    font-weight: 700;
}

.limitation-card__description {
    margin-top: 12px;
    color: var(--color-text-muted);
}

/*
   8. TABLET (768px and up)
   */
@media (min-width: 768px) {
    .page-container {
        padding-left: 32px;
        padding-right: 32px;
    }

    .page-section {
        padding-top: 64px;
        padding-bottom: 64px;
    }

    .section-title {
        font-size: 2.25rem;
    }

    .hero-section__intro {
        padding-top: 48px;
        padding-bottom: 170px;
    }

    .hero-section__logo-box {
        width: 48px;
        height: 48px;
    }

    .hero-section__title {
        font-size: 3.25rem;
    }

    .hero-section__card-wrapper {
        margin-top: -130px;
    }

    .bmi-card {
        padding: 32px;
        border-radius: 24px;
    }

    .measurement-fields--metric {
        flex-direction: row;
    }

    .measurement-fields--metric .measurement-group {
        flex: 1;
        min-width: 0;
    }
    .bmi-result-panel {
        padding: 32px;
        border-radius: 16px 80px 80px 16px;
    }

    .bmi-result-output {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 32px;
    }

    .bmi-result-output__value {
        font-size: 3.5rem;
    }

    .bmi-result-output__summary {
        flex: 1;
        max-width: 280px;
    }

    .habits-panel {
        padding: 40px 48px;
    }

    .habit-card {
        flex-direction: row;
        align-items: flex-start;
        gap: 32px;
    }

    .icon-circle {
        width: 56px;
        height: 56px;
    }

    .limitations-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px;
    }

    .limitations-grid__intro {
        grid-column: 1 / -1;
    }

    .limitation-card--race {
        grid-column: 1 / -1;
        justify-self: center;
        width: calc(50% - 12px);
    }
}

/*
   9. DESKTOP (1024px and up)
   */
@media (min-width: 1024px) {
    .page-section {
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .hero-section {
        display: grid;
    }

    .hero-section__intro,
    .hero-section__card-wrapper {
        grid-column: 1;
        grid-row: 1;
    }

    .hero-section__intro {
        width: 70%;
        padding-top: 56px;
        padding-bottom: 150px;
        text-align: left;
        border-radius: 0 0 40px 0;
    }

    .hero-section__logo-box {
        width: 56px;
        height: 56px;
        margin-left: 0;
        margin-right: 0;
    }

    .hero-section__title {
        margin-top: 80px;
        max-width: 480px;
        font-size: 3.5rem;
    }

    .hero-section__description {
        max-width: 440px;
    }

    .hero-section__card-wrapper {
        margin-top: 120px;
        z-index: 1;
    }

    .bmi-card {
        width: 46%;
        margin-left: auto;
    }

    .two-column-section {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 96px;
    }

    .habits-panel {
        padding: 56px 64px;
    }

    .habit-list {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 40px;
    }

    .habit-card {
        flex-direction: column;
        gap: 24px;
    }

    .limitations-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
        column-gap: 30px;
        row-gap: 30px;
    }

    .limitations-grid__intro {
        grid-column: 1 / span 3;
        grid-row: 1;
        align-self: center;
        text-align: left;
        padding-right: 32px;
    }

    .limitation-card--gender {
        grid-column: 4 / span 2;
        grid-row: 1;
    }

    .limitation-card--age {
        grid-column: 2 / span 2;
        grid-row: 2;
    }

    .limitation-card--muscle {
        grid-column: 4 / span 2;
        grid-row: 2;
    }

    .limitation-card--pregnancy {
        grid-column: 1 / span 2;
        grid-row: 3;
    }

   
    .limitation-card--race {
        grid-column: 3 / span 2;
        grid-row: 3;
        justify-self: stretch;
        width: auto;
    }
}




/* i had added this because it is not in the design */
#check-bmi-button {
    width: 100%;
    margin-top: 24px;
    padding: 16px;
    border: none;
    border-radius: 12px;
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#check-bmi-button:hover {
    background-color: var(--color-hero-gradient-start);
}

#check-bmi-button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 3px;
}