/* ========== Base Styles ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --Green-900: hsl(183, 100%, 15%);
  --Grey-500: hsl(186, 14%, 43%);
  --Grey-400: hsl(184, 14%, 56%);
  --Grey-200: hsl(185, 41%, 84%);
  --Grey-50: hsl(189, 47%, 97%);
  --White: hsl(0, 100%, 100%);
  --Green-500: hsl(172, 66%, 48%);
  --Green-400: hsl(172, 71%, 51%);
}

body {
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  background-color: var(--Grey-200);
}

/* ========== Container ========== */
.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  padding: 1rem;
}

.container img {
  margin-top: -1rem;
  margin-bottom: 1.5rem;
  width: 100px;
}

/* ========== Box Layout ========== */
.box {
  display: flex;
  justify-content: center;
  align-items: stretch;
  width: 100%;
  max-width: 900px;
  background-color: var(--White);
  border-radius: 20px;
  padding: 1rem;
  gap: 1rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* ========== Left Box (Inputs) ========== */
.box-1 {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-radius: 20px;
}

.bill, .tip-percent, .people {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 1rem;
}

.bill input, .option-btns input, .people input {
  height: 2.5rem;
  width: 100%;
  border-radius: 5px;
  border: 2px solid transparent;
  padding: 10px;
  background-color: var(--Grey-50);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: right;
  transition: border 0.2s ease;
}

.bill input {
  background-image: url(images/icon-dollar.svg);
  background-repeat: no-repeat;
  background-position: 10px center;
}

.people input {
  background-image: url(images/icon-person.svg);
  background-repeat: no-repeat;
  background-position: 10px center;
}

.bill input:hover,
.bill input:focus,
.people input:hover,
.people input:focus,
.option-btns input:focus {
  border: 2px solid var(--Green-500);
  outline: none;
  cursor: pointer;
}

/* Hide number arrows */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Tip Percentage Buttons */
.option-btns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 10px;
}

.option-btns button {
  height: 2.5rem;
  border-radius: 5px;
  border: none;
  background-color: var(--Green-900);
  color: var(--White);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.option-btns button:hover {
  background-color: var(--Green-400);
  color: var(--Green-900);
}

/* Label Adjustments */
.label {
  display: flex;
  justify-content: space-between;
  margin: 0 1rem;
}

.label label:nth-child(2) {
  color: red;
  font-size: 0.9rem;
}

/* ========== Right Box (Results) ========== */
.box-2 {
  flex: 1;
  background-color: var(--Green-900);
  border-radius: 20px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tip-amount, .total {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.amount{
  font-size: 50px;
}
.tip-amount p, .total p {
  color: var(--White);
  font-size: 0.9rem;
}

.tip-amount span, .total span {
  color: var(--Grey-400);
  font-size: 0.8rem;
}

.tip-amount h2, .total h2 {
  color: var(--Green-400);
  font-size: 2.2rem;
}

#reset {
  height: 2.5rem;
  border-radius: 5px;
  border: none;
  background-color: var(--Green-400);
  color: var(--Green-900);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
  margin-top: 1.5rem;
}

#reset:hover {
  background-color: var(--Green-500);
  color: var(--White);
}

/* ========== Responsive Design ========== */
@media (max-width: 900px) {
  .box {
    flex-direction: column;
    width: 90%;
    height: auto;
  }

  .box-1, .box-2 {
    width: 100%;
  }

  .tip-amount h2, .total h2 {
    font-size: 2rem;
  }
}

@media (max-width: 600px) {
  .container img {
    width: 80px;
  }

  .box {
    width: 95%;
    padding: 1rem;
  }

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

  .option-btns button,
  .option-btns input {
    width: 100%;
  }

  .tip-amount h2, .total h2 {
    font-size: 1.8rem;
  }

  #reset {
    font-size: 1rem;
    margin-top: 1rem;
  }
}

@media (max-width: 400px) {
  .tip-amount h2, .total h2 {
    font-size: 1.5rem;
  }

  .container img {
    width: 70px;
  }

  .option-btns {
    grid-template-columns: 1fr 1fr;
  }
}