/* ============================================================================
 * Trilogy Mind Body Soul — BMI Calculator
 * Self-contained styling using the site palette
 * (Primary #1C0E21, Secondary #FF4500, Text #5E5E5E, Accent #F5FAFF).
 * ========================================================================== */

.tri-bmi {
    --tri-orange: #ff4500;
    --tri-primary: #1c0e21;
    --tri-text: #5e5e5e;
    --tri-accent: #f5faff;
    --tri-line: rgba(28, 14, 33, 0.1);
    --tri-ease: cubic-bezier(0.22, 0.61, 0.36, 1);

    /* category colours */
    --c-under: #3b9ad6;
    --c-healthy: #2bb673;
    --c-over: #f5a623;
    --c-obese: #e63946;

    max-width: 980px;
    margin: 40px auto;
    padding: 0 16px;
    box-sizing: border-box;
    color: var(--tri-primary);
    font-family: "Inter", "DM Sans", system-ui, -apple-system, sans-serif;
}

.tri-bmi *,
.tri-bmi *::before,
.tri-bmi *::after {
    box-sizing: border-box;
}

.tri-bmi__card {
    background: #fff;
    border: 1px solid var(--tri-line);
    border-radius: 22px;
    box-shadow: 0 24px 60px -28px rgba(28, 14, 33, 0.28);
    padding: clamp(24px, 4vw, 44px);
}

/* ---- Header ---- */
.tri-bmi__eyebrow {
    display: inline-block;
    position: relative;
    color: var(--tri-orange);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    padding-bottom: 11px;
}
.tri-bmi__eyebrow::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--tri-orange);
}
.tri-bmi__title {
    margin: 16px 0 8px;
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--tri-primary);
}
.tri-bmi__intro {
    margin: 0;
    color: var(--tri-text);
    line-height: 1.6;
    font-size: 1rem;
}

/* ---- Two-column layout: form (left) / artifacts (right) ---- */
.tri-bmi__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 26px;
    align-items: stretch;
    margin-top: 26px;
}
.tri-bmi__panel--result {
    background: linear-gradient(160deg, #ffffff 0%, var(--tri-accent) 100%);
    border: 1px solid var(--tri-line);
    border-radius: 18px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 340px;
}
.tri-bmi__empty {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    height: 100%;
}
.tri-bmi__empty-eyebrow {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--tri-text);
    opacity: 0.7;
}
.tri-bmi__empty-score {
    display: flex;
    align-items: baseline;
    gap: 10px;
}
.tri-bmi__empty-num {
    font-size: clamp(2.6rem, 7vw, 3.4rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
    color: rgba(28, 14, 33, 0.18);
    animation: triBmiPulse 1.8s ease-in-out infinite;
}
.tri-bmi__empty-tag {
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--tri-text);
    background: rgba(28, 14, 33, 0.06);
}
@keyframes triBmiPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.45; }
}

/* Dimmed preview of the scale shown before submitting. */
.tri-bmi__scale--preview {
    opacity: 0.85;
    filter: saturate(0.7);
}
.tri-bmi__marker--ghost {
    left: 50%;
    background: #fff;
    border-color: rgba(28, 14, 33, 0.25);
    border-style: dashed;
    box-shadow: none;
    animation: none;
}

.tri-bmi__empty-text {
    margin: 6px 0 0;
    max-width: 320px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--tri-text);
}
.tri-bmi__empty-text strong {
    color: var(--tri-primary);
}

/* ---- Unit toggle (segmented control with a sliding highlight) ---- */
.tri-bmi__units {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    max-width: 320px;
    margin: 28px 0 6px;
    padding: 4px;
    background: var(--tri-accent);
    border-radius: 999px;
    box-shadow: inset 0 0 0 1px var(--tri-line);
    -webkit-tap-highlight-color: transparent;
}
.tri-bmi__thumb {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    border-radius: 999px;
    background: var(--tri-orange);
    box-shadow: 0 6px 16px -5px rgba(255, 69, 0, 0.55);
    transition: transform 0.34s var(--tri-ease);
    z-index: 0;
}
.tri-bmi__units.is-imperial .tri-bmi__thumb {
    transform: translateX(100%);
}
.tri-bmi__unit {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    cursor: pointer;
    border-radius: 999px;
    padding: 9px 10px;
    color: var(--tri-text);
    transition: color 0.25s ease;
}
.tri-bmi__unit input {
    position: absolute;
    opacity: 0;
    inset: 0;
    margin: 0;
    cursor: pointer;
}
.tri-bmi__unit-name {
    font-weight: 700;
    font-size: 14px;
    line-height: 1.1;
}
.tri-bmi__unit-hint {
    font-size: 11px;
    font-weight: 500;
    opacity: 0.75;
    line-height: 1.1;
}
.tri-bmi__unit.is-active {
    color: #fff;
}
.tri-bmi__unit:not(.is-active):hover {
    color: var(--tri-primary);
}

/* ---- Fields ---- */
.tri-bmi__fields {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    margin-top: 16px;
}
.tri-bmi__label {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--tri-primary);
}
.tri-bmi__inputs {
    display: flex;
    gap: 10px;
}
.tri-bmi__input-wrap {
    position: relative;
    flex: 1;
}
.tri-bmi__input-wrap input {
    width: 100%;
    height: 52px;
    padding: 0 46px 0 16px;
    font-size: 16px;
    color: var(--tri-primary);
    background: #fff;
    border: 1.5px solid var(--tri-line);
    border-radius: 12px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    -moz-appearance: textfield;
}
.tri-bmi__input-wrap input::-webkit-outer-spin-button,
.tri-bmi__input-wrap input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.tri-bmi__input-wrap input:focus {
    outline: none;
    border-color: var(--tri-orange);
    box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.15);
}
.tri-bmi__suffix {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--tri-text);
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
}

/* ---- Button ---- */
.tri-bmi__btn {
    margin-top: 24px;
    width: 100%;
    border: none;
    cursor: pointer;
    background: var(--tri-orange);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    padding: 15px 24px;
    border-radius: 80px;
    box-shadow: 0 12px 26px -8px rgba(255, 69, 0, 0.55);
    transition: transform 0.2s var(--tri-ease), box-shadow 0.2s var(--tri-ease);
}
.tri-bmi__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 34px -10px rgba(255, 69, 0, 0.65);
}
.tri-bmi__btn:active {
    transform: translateY(0);
}

.tri-bmi__error {
    margin: 14px 0 0;
    color: var(--c-obese);
    font-size: 14px;
    font-weight: 600;
}

/* ---- Result ---- */
.tri-bmi__result {
    animation: triBmiFade 0.45s var(--tri-ease) both;
}
@keyframes triBmiFade {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.tri-bmi__score {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 12px;
}
.tri-bmi__score-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--tri-text);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.tri-bmi__score-value {
    font-size: clamp(2.6rem, 7vw, 3.6rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--tri-primary);
}
.tri-bmi__badge {
    padding: 7px 16px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 14px;
    color: #fff;
    background: var(--tri-text);
}
.tri-bmi__badge[data-cat="under"] { background: var(--c-under); }
.tri-bmi__badge[data-cat="healthy"] { background: var(--c-healthy); }
.tri-bmi__badge[data-cat="over"] { background: var(--c-over); }
.tri-bmi__badge[data-cat="obese"] { background: var(--c-obese); }

/* ---- Scale ---- */
.tri-bmi__scale {
    margin-top: 26px;
}
.tri-bmi__bar {
    position: relative;
    height: 12px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        var(--c-under) 0%,
        var(--c-under) 25%,
        var(--c-healthy) 25%,
        var(--c-healthy) 50%,
        var(--c-over) 50%,
        var(--c-over) 75%,
        var(--c-obese) 75%,
        var(--c-obese) 100%
    );
}
.tri-bmi__marker {
    position: absolute;
    top: 50%;
    left: 0;
    width: 22px;
    height: 22px;
    background: #fff;
    border: 4px solid var(--tri-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 4px 10px rgba(28, 14, 33, 0.25);
    transition: left 0.6s var(--tri-ease);
}
.tri-bmi__ticks {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 12px;
    font-size: 12px;
    line-height: 1.4;
    color: var(--tri-text);
    text-align: center;
}
.tri-bmi__ticks strong {
    color: var(--tri-primary);
    font-weight: 700;
}

.tri-bmi__range {
    margin: 22px 0 0;
    padding: 14px 18px;
    background: var(--tri-accent);
    border-radius: 12px;
    color: var(--tri-primary);
    font-size: 15px;
    line-height: 1.5;
}
.tri-bmi__range strong { color: var(--tri-orange); }

.tri-bmi__disclaimer {
    margin: 26px 0 0;
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--tri-text);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .tri-bmi__grid {
        grid-template-columns: 1fr;
    }
    .tri-bmi__panel--result {
        min-height: auto;
    }
}
@media (max-width: 560px) {
    .tri-bmi__ticks {
        font-size: 10.5px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tri-bmi__btn,
    .tri-bmi__marker,
    .tri-bmi__thumb,
    .tri-bmi__empty-num,
    .tri-bmi__result {
        transition: none !important;
        animation: none !important;
    }
}