* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { font-size: 16px; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

body, input, button {
  color: var(--color-text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: dotted 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover { color: var(--color-text-strong); border-bottom-color: transparent; }

h1 {
  position: relative;
  margin: 0 0 0.6em;
  padding-bottom: 0.35em;
  color: var(--color-text-strong);
  font-size: 2.75em;
  line-height: 1.5;
}

h1::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.05em;
  border-radius: 0.2em;
  background: linear-gradient(to right, var(--color-gradient-start), var(--color-gradient-end));
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
  padding: 1.5em 2em;
  background: var(--color-bg);
}

.header__title {
  color: var(--color-text-strong);
  font-size: 1.25em;
  font-weight: bold;
  border: 0;
}

.header__link {
  color: var(--color-text-light);
  font-size: 0.7em;
  font-weight: bold;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  border: 0;
}

.header__link:hover { color: var(--color-text-strong); }

@media (max-width: 600px) {
  .header { padding: 1.25em 1em; }
  .header__title { font-size: 1.1em; white-space: nowrap; }
  .header__link { font-size: 0.6em; letter-spacing: 0.15em; text-align: right; }
}

.app {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--color-accent1);
  padding: 4em 2em;
}

@media (max-width: 700px) {
  .app { padding: 2.5em 1em; }
  h1 { font-size: 2em; }
}

.login {
  width: 100%;
  max-width: 30em;
  margin: auto;
}

.login p { margin: 0 0 2em; }

.updated {
  color: var(--color-text-light);
  font-size: 0.8em;
}

.login .updated { margin: -1.5em 0 2em; }
.viewer .updated { margin: 0.25em 0 0; }

.login__form { display: grid; gap: 1.25em; }

.login__form .btn {
  height: calc(4em + 2px);
  font-size: 0.75rem;
  line-height: 4em;
}

.field { display: grid; gap: 0.5em; }

.field > span {
  color: var(--color-text-strong);
  font-weight: bold;
  line-height: 1.5;
}

input[type="password"] {
  appearance: none;
  width: 100%;
  height: 2.75em;
  padding: 0 1em;
  color: var(--color-text-strong);
  background: var(--color-border-bg);
  border: solid 1px var(--color-border);
  border-radius: 0.25em;
  outline: 0;
}

input[type="password"]:focus {
  border-color: var(--color-text-strong);
  box-shadow: 0 0 0 1px var(--color-text-strong);
}

.login__error {
  margin: 0 !important;
  color: var(--color-warning);
  font-size: 0.9em;
}

.login__contact {
  display: inline-block;
  margin-top: 2em;
  font-size: 0.9em;
}

.viewer {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 68em;
  margin: 0 auto;
}

.viewer__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 0 2em;
}

.viewer__bar h1 { flex: 1 1 auto; }

.viewer__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75em;
  margin-bottom: 1.5em;
}

.viewer__frame {
  flex: 1;
  width: 100%;
  min-height: 75vh;
  background: var(--color-bg-alt);
  border: solid 1px var(--color-border);
  border-radius: 0.25em;
}

.viewer__hint {
  margin: 1em 0 0;
  color: var(--color-text-light);
  font-size: 0.8em;
}

.btn {
  display: inline-block;
  height: calc(4.75em + 2px);
  padding: 0 3em;
  font-size: 0.6rem;
  font-weight: bold;
  line-height: 4.75em;
  letter-spacing: 0.25em;
  text-align: center;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--color-text-strong);
  background: transparent;
  border: solid 1px var(--color-border);
  border-radius: 3em;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn:hover { color: var(--color-text-strong); background: var(--color-border-bg); border-color: var(--color-border); }

.btn--primary {
  color: var(--color-accent1);
  background: var(--color-text-strong);
  border-color: var(--color-text-strong);
}

.btn--primary:hover {
  color: var(--color-accent1);
  background: color-mix(in srgb, var(--color-text-strong) 85%, transparent);
}

.btn:disabled { opacity: 0.5; cursor: wait; }

.footer {
  padding: 2.5em 2em;
  background: var(--color-accent3);
}

.footer .menu {
  display: flex;
  flex-wrap: wrap;
  max-width: 68em;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  font-size: 0.8em;
  color: var(--color-border);
}

.footer .menu li + li {
  margin-left: 1.5em;
  padding-left: 1.5em;
  border-left: solid 1px var(--color-border);
}