/* ================= BMI CALCULATION CARD ================= */
.bmi-card {
  background: #ffffff;
  padding: 35px 30px;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  max-width: 100%;       /* Make it responsive */
  width: 100%;           /* Fit parent container */
  transition: transform 0.3s;
}

.bmi-card:hover {
  transform: translateY(-5px);
}

/* ================= LAYOUT: CALCULATOR + SIDEBAR ================= */
.bmi-layout {
  display: grid;
  grid-template-columns: 1fr auto; /* Sidebar only takes needed width */
  gap: 30px;
  max-width: 1100px;
  margin: 40px auto;
  padding: 0 20px;
  align-items: start; /* Prevent stretching */
}


/* ================= UNIT TOGGLE BUTTONS ================= */
.unit-toggle {
  display: flex;
  justify-content: center;
  margin-bottom: 25px;
  gap: 10px;
}

.unit-toggle .toggle {
  flex: 1;
  padding: 12px 0;
  border-radius: 12px;
  border: 1px solid #ddd;
  background: #f1f3f9;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 14px;
}

.unit-toggle .toggle.active {
  background: linear-gradient(135deg, #5b5bf7, #3737ff);
  color: #fff;
  border: none;
}

/* ================= INPUT GROUPS ================= */
.input-group {
  margin-bottom: 18px;
}

.input-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: #333;
}

.input-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #ddd;
  font-size: 15px;
  transition: all 0.3s;
}

.input-group input:focus {
  border-color: #5b5bf7;
  box-shadow: 0 0 0 3px rgba(91,91,247,0.15);
  outline: none;
}

/* ================= BUTTONS ================= */
.button-group {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.button-group .btn-primary {
  flex: 2;
  padding: 14px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, #5b5bf7, #3737ff);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.button-group .btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-2px);
}

.button-group .btn-secondary {
  flex: 1;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #ddd;
  background: #f1f3f9;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.button-group .btn-secondary:hover {
  background: #e2e6f0;
  transform: translateY(-1px);
}

/* ================= RESULT SECTION ================= */
.result-section {
  margin-top: 25px;
  padding: 25px;
  background: linear-gradient(120deg, #eef2ff, #f6f8fc);
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  transition: all 0.3s;
}

.result-section h2 {
  font-size: 1.7rem;
  margin-bottom: 10px;
  color: #5b5bf7;
}

.result-section p {
  font-size: 1rem;
  color: #555;
  margin-bottom: 10px;
}

/* ================= RESPONSIVE ================= */
@media(max-width: 992px) {
  .bmi-layout {
    grid-template-columns: 1fr;
  }

  .related-card {
    position: relative;
    top: 0;
    margin-top: 25px;
    max-width: 100%;
  }
}

@media(max-width: 600px) {
  .bmi-card {
    padding: 25px;
  }

  .button-group {
    flex-direction: column;
  }

  .button-group .btn-primary,
  .button-group .btn-secondary {
    flex: 1;
  }

  .content-section, .related-card {
    padding: 20px;
  }
}

/* ================= RESULT SECTION (PREMIUM ANIMATION) ================= */

.hidden {
  opacity: 0;
  visibility: hidden;
  height: 0;
  overflow: hidden;
}
.indicator {
  position: absolute;
  top: -6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #3737ff;
  transition: left 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}


.result-section {
  margin-top: 25px;
  padding: 30px;
  background: linear-gradient(135deg, #eef2ff, #f8faff);
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 15px 40px rgba(91, 91, 247, 0.08);
  position: relative;
  overflow: hidden;

  opacity: 0;
  transform: translateY(20px);
  transition: 
    opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-section.show {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  height: auto;
}


/* Subtle animated glow background */
.result-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(91,91,247,0.15) 0%, transparent 60%);
  animation: glowMove 6s linear infinite;
  z-index: 0;
}

@keyframes glowMove {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.result-section h2,
.result-section p {
  position: relative;
  z-index: 1;
}

/* Animated BMI number */
#bmiValue {
  font-size: 2.2rem;
  font-weight: 700;
  color: #3737ff;
  display: inline-block;
  transition: transform 0.4s ease;
}

#bmiValue.animate {
  animation: pop 0.5s ease;
}

@keyframes pop {
  0% { transform: scale(0.8); opacity: 0; }
  60% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); }
}

/* Category animation */
#bmiCategory {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

#bmiCategory.show {
  opacity: 1;
  transform: translateY(0);
}

/* ================= BMI SCALE ================= */

.bmi-scale {
  position: relative;
  height: 12px;
  border-radius: 10px;
  background: linear-gradient(
    to right,
    #4da3ff 0%,
    #4da3ff 25%,
    #4caf50 25%,
    #4caf50 50%,
    #ff9800 50%,
    #ff9800 75%,
    #f44336 75%,
    #f44336 100%
  );
  margin-top: 20px;
  overflow: hidden;
}

.indicator {
  position: absolute;
  top: -6px;
  width: 20px;
  height: 20px;
  background: #3737ff;
  border-radius: 50%;
  box-shadow: 0 0 15px rgba(55,55,255,0.6);
  transform: translateX(0);
  transition: left 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================
   GLOBAL SAFETY FIXES
========================================= */

* {
  box-sizing: border-box;
}

main.container {
  max-width: 1200px;
  margin: auto;
}

/* Prevent layout overflow */
.bmi-card,
.content-section,
.related-card {
  width: 100%;
}

/* =========================================
   LARGE DESKTOP (1400px+)
========================================= */
@media (min-width: 1400px) {

  .bmi-layout {
    max-width: 1300px;
    gap: 50px;
  }

  .tool-header h1 {
    font-size: 3rem;
  }
}

/* =========================================
   LAPTOP (1200px)
========================================= */
@media (max-width: 1200px) {

  .bmi-layout {
    gap: 25px;
  }

  .bmi-card {
    padding: 30px;
  }

  .content-section {
    padding: 30px;
  }
}

/* =========================================
   TABLET (992px and below)
========================================= */
@media (max-width: 992px) {

  .bmi-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .emi-sidebar {
    position: relative;
    top: 0;
  }

  .tool-header h1 {
    font-size: 2.2rem;
  }

  .bmi-card {
    padding: 28px;
  }

  .result-section {
    padding: 25px;
  }

  .content-section {
    padding: 28px;
  }
}

/* =========================================
   LARGE MOBILE (768px)
========================================= */
@media (max-width: 768px) {

  main.container {
    padding: 40px 15px !important;
  }

  .tool-header h1 {
    font-size: 1.9rem;
  }

  .tool-header p {
    font-size: 15px;
  }

  .bmi-card {
    padding: 22px;
    border-radius: 16px;
  }

  .unit-toggle {
    flex-direction: column;
  }

  .unit-toggle .toggle {
    font-size: 14px;
  }

  .button-group {
    flex-direction: column;
  }

  .button-group .btn-primary,
  .button-group .btn-secondary {
    width: 100%;
  }

  .result-section h2 {
    font-size: 1.5rem;
  }

  #bmiValue {
    font-size: 1.8rem;
  }

  .content-section {
    padding: 22px;
  }

  .related-card {
    padding: 22px;
  }
}

/* =========================================
   SMALL MOBILE (480px)
========================================= */
@media (max-width: 480px) {

  .tool-header h1 {
    font-size: 1.6rem;
  }

  .bmi-card {
    padding: 18px;
  }

  .content-section {
    padding: 18px;
  }

  .related-card {
    padding: 18px;
  }

  .input-group input {
    font-size: 14px;
    padding: 10px;
  }

  .result-section {
    padding: 20px;
  }

  #bmiValue {
    font-size: 1.6rem;
  }

  .bmi-scale {
    height: 10px;
  }

  .indicator {
    width: 16px;
    height: 16px;
  }
}

/* =========================================
   EXTRA SMALL DEVICES (360px)
========================================= */
@media (max-width: 360px) {

  main.container {
    padding: 30px 10px !important;
  }

  .tool-header h1 {
    font-size: 1.4rem;
  }

  .bmi-card,
  .content-section,
  .related-card {
    padding: 15px;
  }

  .input-group input {
    font-size: 13px;
  }

  #bmiValue {
    font-size: 1.4rem;
  }
}