:root {

  /* Colors */

  --onyx:         hsl(0, 0%, 25%);
  --azure:        hsl(219, 77%, 60%);
  --white:        hsl(0, 0%, 100%);
  --platinum:     hsl(0, 0%, 91%);
  --gainsboro:    hsl(0, 0%, 90%);
  --red-salsa:    hsl(0, 77%, 60%);
  --dim-gray:     hsl(0, 0%, 39%);
  --davys-gray:   hsl(0, 0%, 30%);
  --spanish-gray: hsl(0, 0%, 62%);
  --quick-silver: hsl(0, 0%, 64%);

  /* Typography */

  --fs-28: 28px;
  --fs-24: 24px;
  --fs-18: 18px;
  --fs-15: 15px;
  --fs-14: 14px;

  --fw-5: 500;
  --fw-6: 600;
  --fw-7: 700;

  /* Others */

  --px: 60px;
  --radius: 5px;

}

/* Reset  */

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

html { font-family: 'Source Sans 3', sans-serif; }

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: none;
  background: none;
  font: inherit;
  cursor: pointer;
}

ion-icon, span { display: inline-block; }

label, img { display: block; }

input {
  font: inherit;
  width: 100%;
  border: none;
}

input:focus { outline: 2px solid var(--azure); }

/* Remove number input up & down button */

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

/* Custom scrollbar style */

::-webkit-scrollbar { width: 8px; }

::-webkit-scrollbar-track { background: transparent; }

::-webkit-scrollbar-thumb {
  background: hsl(0, 0%, 80%);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover { background: hsl(0, 0%, 70%); }


/* MAIN STYLE */

/* main container  */


.container {
  max-width: 1440px;
  min-height: 100vh;
  margin: auto;
  display: flex;
  flex-direction: column;
}

.heading {
  font-size: var(--fs-28);
  font-weight: var(--fw-6);
  color: var(--onyx);
  border-bottom: 1px solid var(--gainsboro);
  padding: 20px var(--px);
  display:     flex;
  align-items: center;
  gap: 20px;
}

.heading ion-icon { font-size: 40px; }

.item-flex {
  display: flex;
  flex-grow: 1;
}

/* checkout section style */

.checkout {
  width: 70%;
  padding: 40px var(--px);
  background: var(--white);
  border-right: 1px solid var(--gainsboro);
}

.section-heading {
  color: var(--onyx);
  margin-bottom: 30px;
  font-size: var(--fs-24);
  font-weight: var(--fw-5);
}

.payment-form { margin-bottom: 40px; }

.payment-method {
  display:     flex;
  align-items: center;
  gap: 30px;
  margin-bottom: 40px;
}

.payment-method .method {
  border: 1px solid var(--quick-silver);
  border-radius: var(--radius);
  width: 50%;
  display:     flex;
  align-items: center;
  padding: 15px 30px;
  gap: 20px;
  cursor: pointer;
}

.payment-method .selected { border-color: var(--azure); }

.payment-method .method ion-icon { font-size: 20px; }

.payment-method .method .checkmark {
  margin-left: auto;
  color: var(--quick-silver);
}

.payment-method .method .fill { color: var(--azure); }

.label-default {
  padding-left: 10px;
  margin-bottom: 5px;
  font-size: var(--fs-14);
  color: var(--spanish-gray);
}

.input-default {
  background: var(--platinum);
  border-radius: var(--radius);
  color: var(--davys-gray);
}

.payment-form input {
  padding: 10px 15px;
  font-size: var(--fs-18);
  font-weight: var(--fw-5);
}

.cardholder-name,
.card-number { margin-bottom: 20px; }

.card-number input,
.cvv input { letter-spacing: 3px; }

.input-flex {
  display:     flex;
  align-items: center;
  gap: 30px;
}

.input-flex .expire-date,
.input-flex .cvv { width: 50%; }

.expire-date .input-flex {
  color: var(--spanish-gray);
  gap: 13px;
}

.expire-date .input-flex input { text-align: center; }

.btn { border-radius: var(--radius); }

.btn:active { transform: scale(0.99); }

.btn:focus {
  color: var(--white);
  background: var(--azure);
  outline: 2px solid var(--azure);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--azure);
  font-weight: var(--fw-5);
  color: var(--white);
  padding: 13px 45px;
}

.btn-primary b { margin-right: 10px; }


/* cart section style */

.cart {
  width: 40%;
  display:         flex;
  flex-direction:  column;
  justify-content: flex-end;
}

.cart-item-box {
  padding: 40px var(--px);
  margin-bottom: auto;
}

.product-card:not(:last-child) { margin-bottom: 20px; }

.product-card .card {
  position: relative;
  display:     flex;
  align-items: flex-start;
  gap: 20px;
}

.card .product-img { border-radius: var(--radius); }

.card .detail .product-name {
  font-weight: var(--fw-6);
  font-size: var(--fs-15);
  color: var(--dim-gray);
  margin-bottom: 10px;
}

.card .detail .wrapper {
  display: flex;
  gap: 20px;
}

.product-qty {
  display:     flex;
  align-items: center;
  gap: 10px;
}

.product-qty button {
  background: var(--platinum);
  width:  20px;
  height: 20px;
  display:         flex;
  justify-content: center;
  align-items:     center;
}

.product-qty button:active,
.product-close-btn:active ion-icon { transform: scale(0.95); }

.product-qty button ion-icon {
  --ionicon-stroke-width: 60px;
  font-size: 10px;
}

.product-close-btn {
  position: absolute;
  top:   0;
  right: 0;
}

.product-close-btn ion-icon {
  font-size: 25px;
  color: var(--quick-silver);
}

.product-close-btn:hover ion-icon { color: var(--red-salsa); }

.discount-token {
  padding: 40px var(--px);
  border-top:    1px solid var(--gainsboro);
  border-bottom: 1px solid var(--gainsboro);
}

.wrapper-flex {
  display:     flex;
  align-items: center;
  gap: 30px;
}

.wrapper-flex input {
  padding: 12px 15px;
  font-weight: var(--fw-6);
  letter-spacing: 2px;
}

.btn-outline {
  padding: 10px 25px;
  border: 1px solid var(--azure);
  color: var(--azure);
}

.btn-outline:hover {
  background: var(--azure);
  color: var(--white);
}

.amount { padding: 40px var(--px); }

.amount > div {
  display:         flex;
  justify-content: space-between;
}

.amount > div:not(:last-child) { margin-bottom: 10px; }

.amount .total {
  font-size: var(--fs-18);
  font-weight: var(--fw-7);
  color: var(--onyx);
}

/* RESPONSIVE */

@media (max-width: 1200px) {

  .item-flex { flex-direction: column-reverse; }

  /* checkout section responsive */

  .checkout {
    width: 100%;
    border-right: none;
  }

  .btn-primary { width: 100%; }

  /* cart section responsive */

  .cart {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    border-bottom: 1px solid var(--gainsboro);
  }

  .cart .wrapper { margin-top: auto; }

  .cart .cart-item-box {
    border-right: 1px solid var(--gainsboro);
    margin-bottom: 0;
  }

  .discount-token { border-top: none; }

}





@media (max-width: 768px) {

  :root { --px: 40px; }

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

  .discount-token { border-top: 1px solid var(--gainsboro); }

  .wrapper-flex { gap: 20px; }

}





@media (max-width: 567px) {

  :root { --px: 20px; }

  .payment-method,
  .input-flex {
    flex-direction: column;
    gap: 20px;
  }

  .payment-method .method { width: 100%; }

  .input-flex .expire-date,
  .input-flex .cvv { width: 100%; }

  .expire-date .input-flex { flex-direction: row; }

}