/* ===========================   BMI CALCULATOR ====================== */

.calculator {
 margin: 60px 0 80px;
}

.calculator-grid {
 display: grid;
 grid-template-columns: 460px 1fr;
 gap: 32px;
 align-items: start;
}

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

.calculator-form {
 background: #fff;
 border: 1px solid var(--border);
 border-radius: 28px;
 padding: 36px;
 box-shadow: 0 10px 30px rgba(0, 0, 0, .04);
}

.calculator-form h2 {
 font-size: 34px;
 margin-bottom: 35px;
}

/* =========================   UNIT SWITCH ========== */

.unit-switch {
 display: inline-flex;
 background: #E8F8EE;
 padding: 4px;
 border-radius: 14px;
 margin-bottom: 30px;
}

.unit {
 width: 120px;
 height: 48px;
 border: none;
 background: none;
 border-radius: 10px;
 cursor: pointer;
 font-size: 16px;
 font-weight: 700;
 color: var(--text-light);
 transition: .25s;
}

.unit.active {
 background: var(--primary);
 color: #fff;
 box-shadow:  0 8px 20px rgba(48, 198, 124, .30);
}

/* ==============   INPUTS ================= */

.field {
 margin-bottom: 28px;
}

.field label {
 display: block;
 margin-bottom: 10px;
 font-weight: 700;
}

.input-group {
 position: relative;
}

.input-group input {
 width: 100%;
 height: 64px;
 padding: 0 70px 0 18px;
 border: 1px solid var(--border);
 border-radius: 16px;
 font-size: 22px;
 outline: none;
 transition: .25s;
}

.input-group input:focus {
 border-color: var(--primary);
 box-shadow: 0 0 0 4px rgba(48, 198, 124, .10);
}

.input-group span {
 position: absolute;
 right: 20px;
 top: 50%;
 transform: translateY(-50%);
 color: #98A2B3;
 font-size: 18px;
}

/* ============== BUTTON =========== */

.calculate-btn {
 width: 100%;
 height: 66px;
 margin-top: 18px;
 border: none;
 border-radius: 18px;
 background: var(--primary);
 color: #fff;
 font-size: 22px;
 font-weight: 700;
 cursor: pointer;
 transition: .3s;
}

.calculate-btn:hover {
 background: var(--primary-dark);
 transform: translateY(-2px);
}

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

.calculator-result {
 display: flex;
 flex-direction: column;
 gap: 28px;
}

.result-card {
 background: #fff;
 border: 2px solid var(--primary);
 border-radius: 26px;
 padding: 40px;
 text-align: center;
}

.bmi-value {
 font-size: 78px;
 font-weight: 800;
 color: var(--primary);
 line-height: 1;
 margin-bottom: 18px;
}

.result-card p {
 color: var(--text-light);
 margin-bottom: 20px;
}

.status {
 display: inline-block;
 padding: 12px 24px;
 border-radius: 999px;
 background: #EAF9EF;
 color: var(--primary);
 font-weight: 700;
 font-size: 20px;
}

/* ============== BMI BAR ================== */

.bmi-bar {
 position: relative;
 display: flex;
 height: 24px;
 overflow: hidden;
 border-radius: 999px;
}

.segment {
 height: 100%;
}

.under {
 width: 18%;
 background: #3B82F6;
}

.normal {
 width: 25%;
 background: #22C55E;
}

.over {
 width: 15%;
 background: #F59E0B;
}

.obese {
 width: 42%;
 background: #EF4444;
}

.indicator {
 position: absolute;
 top: -7px;
 width: 6px;
 height: 38px;
 border-radius: 999px;
 background: #1E293B;
 transform: translateX(-50%);
 transition: left .35s ease;
}

/* ==============  LEGEND ============= */

.legend {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 18px;
}

.legend div {
 background: #fff;
 border: 1px solid var(--border);
 border-radius: 18px;
 padding: 22px;
 text-align: center;
}

.legend strong {
 display: block;
 margin-bottom: 10px;
 font-size: 20px;
}

.legend span {
 color: var(--text-light);
 font-size: 15px;
}

.legend div:nth-child(2) {
 border: 2px solid var(--primary);
}

/* ============= HEALTHY WEIGHT ========== */

.healthy {
 display: grid;
 grid-template-columns: repeat(2, 1fr);
 gap: 24px;
}

.healthy div {
 background: linear-gradient(180deg,#ECFFF3,#E4FAEC);
 border-radius: 22px;
 padding: 34px;
 text-align: center;
}

.healthy strong {
 display: block;
 color: var(--primary);
 font-size: 48px;
 margin-bottom: 10px;
}

.healthy span {
 color: var(--text-light);
}

/* ============ RESPONSIVE ============= */

@media(max-width:1100px) {
 .calculator-grid {
  grid-template-columns: 1fr;
 }

}

@media(max-width:768px) {
 .calculator {
  margin: 40px 0;
 }

 .calculator-form {
  padding: 28px;
 }

 .calculator-form h2 {
  font-size: 28px;
 }

 .bmi-value {
  font-size: 58px;
 }

 .legend {
  grid-template-columns: repeat(2, 1fr);
 }

 .healthy {
  grid-template-columns: 1fr;
 }

}

@media(max-width:520px) {
 .unit {
  width: 100px;
 }

 .legend {
  grid-template-columns: 1fr;
 }

 .calculate-btn {
  font-size: 20px;
 }

 .bmi-value {
  font-size: 50px;
 }

}



.gender-group {
    display: flex;
    gap: 12px;
}

.gender {
    flex: 1;
    height: 54px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
    font-weight: 700;
    cursor: pointer;
    transition: .25s;
}

.gender.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.field select {
    width: 100%;
    height: 64px;
    padding: 0 18px;
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 17px;
    background: #fff;
    outline: none;
}

.field select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(48,198,124,.10);
}