/* Custom Variables & Reset */
:root {
  /* Colors */
  --clr-primary-blue: hsl(215, 51%, 70%);
  --clr-primary-cyan: hsl(178, 100%, 50%);
  
  --clr-neutral-bg: hsl(217, 54%, 11%);
  --clr-neutral-card: hsl(216, 50%, 16%);
  --clr-neutral-line: hsl(215, 32%, 27%);
  --clr-neutral-white: hsl(0, 0%, 100%);

  /* Typography */
  --ff-main: 'Outfit', sans-serif;
  --fs-body: 18px;
  
  --fw-light: 300;
  --fw-regular: 400;
  --fw-bold: 600;

  /* Transitions */
  --transition-speed: 0.3s ease;
}

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

body {
  font-family: var(--ff-main);
  font-size: var(--fs-body);
  background-color: var(--clr-neutral-bg);
  color: var(--clr-primary-blue);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

img {
  max-width: 100%;
  display: block;
}

/* Layout Container */
.container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

/* NFT Card Component (BEM)*/
.nft-card {
  background-color: var(--clr-neutral-card);
  max-width: 350px;
  width: 100%;
  border-radius: 15px;
  padding: 1.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Image Wrapper & Overlay State */
.nft-card__img-container {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
}

.nft-card__img {
  width: 100%;
  object-fit: cover;
}

.nft-card__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: hsla(178, 100%, 50%, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity var(--transition-speed);
}

.nft-card__img-container:hover .nft-card__overlay,
.nft-card__img-container:focus-within .nft-card__overlay {
  opacity: 1;
}

/* Card Content Details */
.nft-card__content {
  margin-top: 1.5rem;
}

.nft-card__title {
  font-size: 1.375rem;
  font-weight: var(--fw-bold);
  margin-bottom: 1rem;
}

.nft-card__link {
  color: var(--clr-neutral-white);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.nft-card__link:hover,
.nft-card__link:focus {
  color: var(--clr-primary-cyan);
  outline: none;
}

.nft-card__description {
  font-weight: var(--fw-light);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* Price and Bid Meta Blocks */
.nft-card__bid-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

.nft-card__price {
  color: var(--clr-primary-cyan);
  font-weight: var(--fw-bold);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nft-card__countdown {
  color: var(--clr-primary-blue);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nft-card__divider {
  border: none;
  border-top: 1px solid var(--clr-neutral-line);
  margin-bottom: 1rem;
}

/* Card Footer / Creator Block */
.nft-card__creator {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1rem;
}

.nft-card__avatar {
  width: 33px;
  height: 33px;
  border: 1px solid var(--clr-neutral-white);
  border-radius: 50%;
}

.nft-card__author-text {
  font-weight: var(--fw-light);
}

.nft-card__author-link {
  color: var(--clr-neutral-white);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.nft-card__author-link:hover,
.nft-card__author-link:focus {
  color: var(--clr-primary-cyan);
  outline: none;
}

/* Attribution Footer */
.attribution {
  font-size: 0.6875rem;
  text-align: center;
  color: var(--clr-primary-blue);
  margin-top: 1.5rem;
}

.attribution a {
  color: var(--clr-neutral-white);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.attribution a:hover {
  color: var(--clr-primary-cyan);
}