:root {
  --bg-dark: hsl(60, 3%, 90%);
  --bg: hsl(60, 3%, 94%);
  --bg-light: hsl(60, 3%, 98%);
  --text: hsl(0, 0%, 5%);
  --accent-2: #e80000;
  --accent-3: #ffb500;
  --accent-1: #001f61;
  --accent-1-contrast: hsl(60, 3%, 90%);
  --radius: 10px;
  --header-h: 60px;
  --header-elems-w: 90px;
  --nav-h: 32px;
  --nav-elem-h: 24px;
  --scroll-bar-color: hsl(0, 0%, 70%);
  --scroll-bar-bg-color: transparent;
  --icon-w: 60px;
  --text-w: 1fr;
  --size-w: 85px;
  --date-w: 85px;
  --thumb-h: 175px;
  --color-file: #6c757d; /* generic file - grey */
  --color-folder: #dca93a; /* folder - amber */
  --color-pdf: var(--accent-2); /* pdf - red */
  --color-word: #2b579a; /* word - blue */
  --color-excel: #217346; /* excel - green */
  --color-powerpoint: #ff9f1a; /* powerpoint - orange/red */
  --color-image: #6f42c1; /* image - purple */
  --color-video: #c0392b;
}
* {
  box-sizing: border-box;
}

.fa-file {
  color: var(--color-file);
}

.fa-folder {
  color: var(--color-folder);
}

.fa-file-pdf {
  color: var(--color-pdf);
}

.fa-file-word {
  color: var(--color-word);
}

.fa-file-excel {
  color: var(--color-excel);
}

.fa-file-powerpoint {
  color: var(--color-powerpoint);
}

.fa-file-image {
  color: var(--color-image);
}
.fa-file-video {
  color: var(--color-video);
}

.dark-theme {
  --bg-dark: hsl(60, 3%, 2%);
  --bg: hsl(60, 3%, 6%);
  --bg-light: hsl(60, 3%, 10%);
  --text: hsl(0, 0%, 95%);
  --scroll-bar-color: hsl(0, 0%, 30%);
}

.header-right {
  width: var(--header-elems-w);
  font-size: 1.2em;
  display: flex;
  height: 100%;
  justify-content: center;
  align-items: center;
}

body {
  font-family: "Inter", sans-serif;
  font-optical-sizing: auto;
  margin: 0;
  background-color: var(--bg-dark);
  color: var(--text);
  height: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

h1 {
  margin: 0 16px;
  flex: 1;
  text-align: center;
  font-size: 1.5em;
  color: var(--accent-2);
}

.card {
  background-color: var(--bg);
  /* color: var(--accent-1-contrast); */
  border-radius: var(--radius);
  box-shadow: 2px 2px 15px -7px var(--text);
  padding: 16px;
  border: 1px solid var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 10px auto;
  max-width: 100%;
  gap: 10px;
}

form.card {
  width: 500px;
}

.dark-theme .logo {
  fill: var(--accent-1-contrast);
}

.logo {
  fill: var(--accent-1);
  text-align: center;
  padding: 25px 0;
}
.logo svg {
  width: 200px;
}
.login-page button {
  text-align: center;
}

input,
.login-page button {
  width: 200px;
  min-width: 75%;
  max-width: 100%;
  padding: 8px;
  border: 1px solid var(--text);
  border-radius: var(--radius);
  background-color: var(--bg-light);
  color: var(--text);
  box-shadow: 2px 2px 15px -12px var(--text);
  transition:
    200ms background-color,
    color ease-in-out;
}

.login-page button:hover {
  background-color: var(--text);
  color: var(--bg-light);
}

ul {
  list-style: none;
  padding: 0;
  position: relative;
}
a {
  text-decoration: none;
  color: inherit;
}

button {
  background-color: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  font: inherit;
  text-align: inherit;
}

.file {
  padding: 8px;
  display: grid;
  align-items: center;
  column-gap: 5px;
  grid-template-columns: var(--icon-w) var(--text-w) var(--size-w) var(--date-w);
  text-align: left;
  transition:
    200ms transform,
    background-color ease-in-out;
  border-radius: var(--radius);
}

@media screen and (max-width: 600px) {
  .file {
    grid-template-columns: var(--icon-w) var(--text-w) var(--date-w);
  }
  .file-size {
    display: none;
  }
}

@media screen and (max-width: 500px) {
  .file {
    grid-template-columns: var(--icon-w) var(--text-w);
  }
  .file-date {
    display: none;
  }
  .fixed-title {
    display: none;
  }

  .logo {
    padding: 0;
  }
}

.sort-btn {
  font-weight: bold;
}
.file-container {
  display: grid;
  grid-template-columns: 1fr 50px;
  column-gap: 5px;
  border-bottom: 1px solid #ddd;
  align-items: center;
  overflow: hidden;
}
.file-icon {
  text-align: center;
}
.file-size,
.file-date {
  opacity: 0.8;
}
a.file:hover {
  background-color: var(--bg-light);
  transform: scale(1.05);
  cursor: pointer;
}
.logo-container {
  height: var(--header-h);
  padding: 5px 10px;
  width: var(--header-elems-w);
}

.logo-container svg {
  height: 100%;
  fill: var(--accent-1-contrast);
}
.thumbnailContainer {
  display: none;
  width: 215px;
  height: var(--thumb-h);
  border-radius: var(--radius);
  position: absolute;
  border: 1px solid #ddd;
  z-index: 1;
  overflow: hidden;
  align-self: start;
  transform: translate(var(--icon-w), -100%);
}

.file-row:nth-of-type(-n + 5) .thumbnailContainer {
  align-self: end;

  transform: translate(var(--icon-w), 100%);
}

.file-container:first-of-type {
  position: sticky;
  z-index: 1;
  top: 0;
  background-color: var(--accent-1);
  color: var(--accent-1-contrast);
}

.file-row span {
  word-break: break-all;
}
.file-row:hover .thumbnailContainer {
  display: block;
}

.thumbnailContainer img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.file-list {
  height: calc(100% - var(--nav-h));
  overflow-y: auto;
  background-color: var(--bg);
  border-radius: var(--radius);
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.05),
    0 8px 16px rgba(0, 0, 0, 0.08);
}
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  height: calc(100% - var(--header-h));
  padding-bottom: 100px;
}
.download-link {
  text-align: center;
  height: 100%;
  display: grid;
  align-items: center;
  color: var(--accent-3);
}

header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background-color: var(--accent-1);
  font-family: "Merriweather", "Inter", sans-serif;
  color: var(--accent-1-contrast);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-right > * {
  width: calc(var(--header-elems-w) / 2);
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.header-right > form > button {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-right button:hover {
  background-color: var(--accent-1-contrast);
  color: var(--accent-1);
}

nav {
  height: var(--nav-h);
  overflow-x: auto;
  display: flex;
  gap: 2px;
}

.parent-caret {
  height: var(--nav-elem-h);
  display: flex;
  align-items: center;
}

.parent-folder {
  display: inline-block;
  border-radius: var(--radius);
  background-color: var(--bg);
  padding: 2px 8px;
  white-space: nowrap;
  height: var(--nav-elem-h);
}

::-webkit-scrollbar-corner {
  background: rgba(0, 0, 0, 0.5);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-bar-color) var(--scroll-bar-bg-color);
}

/* Works on Chrome, Edge, and Safari */
*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track {
  background: var(--scroll-bar-bg-color);
}

*::-webkit-scrollbar-thumb {
  background-color: var(--scroll-bar-color);
  border-radius: 20px;
  border: 3px solid var(--scroll-bar-bg-color);
}

.download-link:hover,
.parent-folder:hover {
  scale: 1.1;
  filter: brightness(1.1);
}

.sort-btn:hover {
  filter: brightness(1.1);
}

.error-message {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent-2);
  background-color: var(--bg);
  padding: 10px 20px;
  border-radius: var(--radius);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  flex-direction: column;
}

.login-page main {
  overflow-y: auto;
}