/* --- CSS Custom Variables --- */
:root {
  --clr-primary-blue: hsl(185, 75%, 39%);
  --clr-primary-navy: hsl(229, 23%, 23%);
  --clr-primary-gray: hsl(227, 10%, 46%);
  --clr-neutral-gray-100: hsl(225, 10%, 92%);
  --clr-neutral-white: hsl(0, 0%, 100%);

  --ff-main: 'Kumbh Sans', sans-serif;
  --fs-base: 1.125rem; /* 18px standard base copy */
  --fs-small: 0.625rem; /* 10px stats titles */
  --fs-stats: 1.125rem; /* 18px stats counts */

  --fw-regular: 400;
  --fw-bold: 700;

  --br-card: 0.9375rem; /* 15px border radius */
  --br-avatar: 50%;
}

/* --- Document Reset Rules --- */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, p, ul, li {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
}

img {
  max-inline-size: 100%;
  display: block;
}

/* --- Body Structural Setup --- */
body {
  font-family: var(--ff-main);
  font-size: var(--fs-base);
  background-color: var(--clr-primary-blue);
  color: var(--clr-primary-navy);
  min-block-size: 100vh;
  display: grid;
  grid-template-rows: 1fr auto;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  /* Complex responsive background circle offsets utilizing viewport units and absolute center lines */
  background-image: url('./images/bg-pattern-top.svg'), url('./images/bg-pattern-bottom.svg');
  background-repeat: no-repeat, no-repeat;
  background-position: right 52vw bottom 40vh, left 48vw top 48vh;
}

/* --- Core Card Layout Container --- */
.container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

/* --- Card Component Styles --- */
.card {
  background-color: var(--clr-neutral-white);
  inline-size: 100%;
  max-inline-size: 21.875rem; /* 350px container cap */
  border-radius: var(--br-card);
  box-shadow: 0 3.125rem 6.25rem -1.25rem rgba(8, 28, 48, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Decorational top card banner pattern layout block */
.card__header {
  inline-size: 100%;
  block-size: 8.75rem; /* 140px banner block */
  background-image: url('./images/bg-pattern-card.svg');
  background-size: cover;
  background-repeat: no-repeat;
}

/* Avatar element styling and absolute positioning overlay offset */
.card__avatar-wrapper {
  margin-block-start: -3.125rem; /* Overlap half of avatar radius over card banner split */
  margin-inline: auto;
  block-size: 6rem;
  inline-size: 6rem;
  border-radius: var(--br-avatar);
  border: 0.3125rem solid var(--clr-neutral-white);
  background-color: var(--clr-neutral-white);
}

.card__avatar {
  border-radius: var(--br-avatar);
}

/* Card user identification container block elements */
.card__info {
  text-align: center;
  padding-block: 1.5rem;
}

.card__title {
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--clr-primary-navy);
  margin-block-end: 0.5rem;
}

.card__age {
  font-weight: var(--fw-regular);
  color: var(--clr-primary-gray);
  margin-inline-start: 0.5rem;
}

.card__location {
  font-size: 0.875rem; /* 14px size for architectural location spacing rule */
  color: var(--clr-primary-gray);
  letter-spacing: 0.0938rem;
}

/* Visual layout breaking separator rules */
.card__divider {
  border: 0;
  border-top: 0.0625rem solid var(--clr-neutral-gray-100);
  margin: 0;
}

/* Social metrics block module utilizing Flexbox layout design pattern */
.card__stats {
  display: flex;
  justify-content: space-between;
  padding-block: 1.5rem;
  padding-inline: 2.75rem;
  text-align: center;
}

.card__stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.card__stat-value {
  font-size: var(--fs-stats);
  font-weight: var(--fw-bold);
  color: var(--clr-primary-navy);
  line-height: 1;
}

.card__stat-label {
  font-size: var(--fs-small);
  color: var(--clr-primary-gray);
  letter-spacing: 0.0938rem;
  text-transform: uppercase;
}

/* --- Footnote Attribution Container Styling --- */
.attribution {
  font-size: 0.6875rem;
  text-align: center;
  padding-block-end: 1rem;
  color: var(--clr-neutral-white);
}

.attribution a {
  color: var(--clr-primary-navy);
  font-weight: var(--fw-bold);
  text-decoration: none;
}

.attribution a:hover,
.attribution a:focus {
  text-decoration: underline;
}