html {
  font-size: 62.5%;
}

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

@media (prefers-reduced-motion: reduce) {
  .motion {
    transition: none !important;
  }
}

ul {
  list-style: none;
}

:root {
  --red: hsl(1, 90%, 64%);
  --blue-950: hsl(219, 85%, 26%);
  --blue-100: hsl(211, 68%, 94%);
  --navy-50: hsl(210, 60%, 98%);
  --navy-100: hsl(205, 33%, 90%);
  --navy-950: hsl(224, 21%, 14%);
  --gray-500: hsl(219, 14%, 63%);
  --gray-600: hsl(219, 12%, 42%);
  --transition: 0.3s;
}

.hidden {
  display: none !important;
}

.d-flex {
  display: flex;
}

.jc-center {
  justify-content: center;
}

.jc-between {
  justify-content: space-between;
}

.ai-center {
  align-items: center;
}

body {
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 1.6rem;
}

@media (min-width: 900px) {
  body {
    background-color: var(--navy-50);
    align-items: center;
  }
}

main {
  flex: 1;
  padding: 3rem 1.6rem;
  background-color: white;
}

@media (min-width: 700px) {
  main {
    padding: 3rem 3.2rem;
  }
}

@media (min-width: 900px) {
  main {
    max-width: 75rem;
    margin: 6rem 0;
    border-radius: 1.5rem;
  }
}

header {
  margin-bottom: 2.4rem;
}

@media (min-width: 700px) {
  header {
    margin-bottom: 3.2rem;
  }
}

header h1 {
  font-size: 2rem;
  gap: 0.8rem;
}

@media (min-width: 700px) {
  header h1 {
    font-size: 2.4rem;
    gap: 1.6rem;
  }
}

header h1 .notify-count {
  width: 3.2rem;
  height: 2.5rem;
  background-color: var(--blue-950);
  color: white;
  border-radius: 0.6rem;
  font-size: initial;
}

header .mark-btn {
  background-color: transparent;
  color: var(--gray-600);
  border: none;
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition) color;
  -webkit-tap-highlight-color: transparent;
}

@media (min-width: 700px) {
  header .mark-btn {
    font-size: 1.6rem;
  }
}

@media (min-width: 900px) {
  header .mark-btn:hover {
    color: var(--blue-950);
  }
}

ul li {
  display: flex;
  align-items: flex-start;
  gap: 1.6rem;
}

ul li:last-of-type .notify-msg {
  color: var(--blue-950);
}

ul li img {
  width: 3.9rem;
  height: 3.9rem;
}

@media (min-width: 700px) {
  ul li img {
    width: 4.5rem;
    height: 4.5rem;
  }
}

ul li img:first-of-type {
  border-radius: 50%;
}

@media (max-width: 699px) {
  ul li .notify-info {
    font-size: 1.4rem;
  }
}

ul li .notify-info > p {
  margin-bottom: 0.8rem;
  color: var(--gray-600);
  font-weight: 500;
}

ul li .notify-info > p :where(.user-name, .notify-msg) {
  font-weight: bold;
  transition: var(--transition) color;
  cursor: pointer;
}

ul li .notify-info .user-name {
  color: black;
}

@media (min-width: 900px) {
  ul li .notify-info .user-name:hover {
    color: var(--blue-950);
  }
}

@media (min-width: 900px) {
  ul li .notify-info .notify-msg:hover {
    color: var(--blue-950);
  }
}

ul li .notify-info .time {
  color: var(--gray-500);
  font-weight: 500;
}

ul.unread {
  margin-bottom: 3.2rem;
}

@media (min-width: 700px) {
  ul.unread {
    margin-bottom: 2.6rem;
  }
}

ul.unread li {
  padding: 0.8rem 1.6rem;
}

@media (min-width: 700px) {
  ul.unread li {
    padding: 1.6rem 2.4rem;
  }
}

ul.unread li:not(:last-child) {
  margin-bottom: 0.8rem;
}

ul.unread .unread-notify {
  background-color: var(--navy-50);
  border-radius: 0.8rem;
}

ul.unread li .notify-info > p span {
  margin-inline-end: 0.6rem;
}

ul.unread .unread-notify .notify-info > p::after {
  content: "";
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background-color: var(--red);
}

ul.read {
  padding: 0 1.6rem;
}

@media (min-width: 700px) {
  ul.read {
    padding: 0 2.4rem;
  }
}

ul.read li:not(:last-of-type) {
  margin-bottom: 4rem;
}

ul.read li .notify-info > p span:not(.notify-msg) {
  margin-inline-end: 0.6rem;
}

ul li.rizky-hasanuddin .private-msg {
  margin-top: 0.8rem;
  padding: 1.6rem;
  color: var(--gray-600);
  border: 1px solid var(--navy-100);
  border-radius: 0.6rem;
  line-height: 1.25;
  transition: var(--transition) background-color;
  cursor: pointer;
}

@media (min-width: 900px) {
  ul li.rizky-hasanuddin .private-msg:hover {
    background-color: var(--blue-100);
  }
}

ul.read li.kimberly-smith img:last-of-type {
  border-radius: 0.7rem;
  margin-left: auto;
}