:root {
  --bg: #000;
  --bg-trans: rgba(19, 8, 1, 0.5);
  --card: rgb(37, 17, 2);
  --accent: rgb(246, 131, 48);
  --accent-2: rgb(246, 82, 48);
  --accent-3: #f46d0b;
  --accent-blue: rgb(11, 146, 244);
  --accent-pink: #f40b92;
  --accent-green: var(--good);
  --accent-dark-blue: #111827;
  --muted: rgba(155, 146, 139, 0.4);
  --muted-trans: rgba(155, 146, 139, 0.1);
  --text: #fef4ec;
  --good: #30f683;
  --error: #f63040;
  --radius: 12px;
  --gap: 1.4em;
  --shadow-box-under: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-box-under-btn: 0 10px 30px rgba(246, 131, 48, 0.25);
  --shadow-text-floating: -2px 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-text-floating-clr: -2px 2px 2px rgba(246, 131, 48, 0.25);
}

* {
  box-sizing: border-box;
}

/* utility class */
.flex {
  display: flex;
}

.grid {
  display: grid;
  /* grid-template-columns: 1fr 1fr; */
  grid-template-columns: auto 1fr;
  gap: var(--gap);
}

.hidden {
  /* visibility: hidden; */
  display: none;
}

/* .container {
  max-width: 1200px;
  margin-left: 12%;
  padding: 1.4em;
} */

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
  margin-top: var(--gap);
}

.error {
  color: var(--error);
  font-weight: 600;
  margin-top: 8px;
}
.ok {
  color: var(--good);
  font-weight: 600;
  margin-top: 8px;
}

html {
  min-height: 100%;
  line-height: 1.15;
  font-size: 1rem;
  font-family: "Roboto", sans-serif;
  font-optical-sizing: auto;
  font-weight: 450;
  font-style: normal;
  font-variation-settings: "wdth" 75;
  color: var(--text);

  background: #000;
  background: linear-gradient(
    120deg,
    rgba(112, 59, 20, 1) 0%,
    rgba(0, 0, 0, 1) 25%
  );
}

body {
  margin-block: 0;
  margin-inline: 2em;
}

.container {
  max-width: 90%;
  margin: auto;
}

/* top banner */
#banner {
  background-color: var(--accent);
  text-align: center;
  padding-block: 0.35em;
  color: var(--bg);
  font-size: medium;
  border-end-start-radius: var(--radius);
  border-end-end-radius: var(--radius);
  box-shadow: var(--shadow-box-under);
}
#banner > div > span {
  text-shadow: var(--shadow-text-floating);
}

#banner > div > span:nth-child(1) {
  background-color: var(--bg);
  color: var(--text);
  padding: 0.15em 0.8em;
  border-radius: 8px;
}

.github-logo-banner {
  position: relative;
  top: 3px;
}

.github-logo-banner img {
  height: 20px;
  background: var(--bg);
  border-radius: 50%;
  padding: 0.1em;
}

.head-nav-box {
  margin-inline: 0.4em;
  margin-block: 2em;
  /* align-items: center; */
  gap: var(--gap);
  background-color: var(--bg-trans);
  /* background: linear-gradient(90deg, var(--bg), var(--bg-trans)); */
  border-radius: var(--radius);
  border: 1px solid var(--muted);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0.7em;
  z-index: 10;
}

.brand-logo {
  display: flex;
  align-items: center;
}

.brand-logo img {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: scale-down;
  border-radius: 12px;
  background: transparent;
  padding: 0.3em;
  transition: background-color 2s;
}

.brand-logo a {
  display: block;
}

.brand-logo img:hover {
  background-color: var(--accent);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#login-btn {
  display: flex;
  align-items: center;
  padding-inline: 0.8em;
  border-radius: 12px;
  height: 42px;

  transition: background-color 1.5s;
}

#login-btn:hover {
  background-color: var(--accent);
}

nav > ul {
  display: flex;
  gap: var(--gap);
  font-size: medium;
}
nav > ul > li:hover {
  color: var(--accent);
  transition: color 0.75s;
}

ul,
li {
  margin: 0;
  padding: 0;
  list-style-type: none;
}

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}
h3 {
  text-shadow: var(--shadow-text-floating);
  font-size: 1rem;
}

a {
  text-decoration: none;
  color: inherit;
  display: inline-block;
}

main {
  margin-top: 3em;
}

/* tail */

footer {
  margin-top: 4em;
  margin-inline: 1em;
}
#footer-menu {
  display: flex;
}
#footer-links {
  display: flex;
  gap: 1em;
}

#newsletter {
  justify-items: center;
  flex-grow: 1;
  gap: 4em;
}

h4 {
  font-size: 1.2rem;
  color: var(--accent);
  text-shadow: var(--shadow-text-floating-clr);
}

footer li {
  font-size: 0.8rem;
}

#footer-links > div > ul {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

#footer-links > div > ul > li {
  color: var(--muted);
  transition: color 0.5s;
}

#footer-links > div > ul > li:hover {
  color: var(--text);
}

footer p {
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .summary {
    grid-template-columns: 1fr;
  }
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type="number"] {
  -moz-appearance: textfield;
}