:root {
  --accent-light: #84dee1;
  --accent-lighter: #c1eff0;
  --accent: teal;
  --accent-dark: #066;
  --button-shadow-light: #0aab;
  --button-shadow-dark: #055b;
  --button-shadow-size: 3px;
  --button-highlight-size: 2px;
  --input-border-width: 2px;
  --font-family: monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  background: black;
  color: white;
  line-height: 1.2;
  font-family: var(--font-family);
  font-size: 1rem;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

h1, h2 {
  font-family: var(--font-family);
}

hr {
  border: none;
  border-top: 2px solid var(--accent-light);
}

a {
  color: var(--accent-lighter);
}

a:visited {
  color: var(--accent-light);
}

.header-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1em;
  margin-bottom: 2em;
}

.logo {
  font-family: Arial, sans-serif;
  color: white;
  text-decoration: none;
  font-size: 2rem;
  font-weight: bold;
}

.logo:visited {
  color: white;
}

.auth-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5em;
}

.status-section {
  text-align: center;
  margin: 2em 0;
  padding: 1em;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--accent);
  border-radius: 8px;
}

input {
  font-family: var(--font-family);
  color: white;
  accent-color: var(--accent);
}

input:disabled {
  color: gray;
  filter: grayscale(100%);
}

input[type="text"],
input[type="password"] {
  width: 20em;
  margin: 0.5em 0;
  background-color: black;
  padding: 0.5em;
  border: var(--input-border-width) solid var(--accent);
}

input.long {
  width: 34em;
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
  color: white;
  opacity: 0.75;
}

@media (max-width: 600px) {
  input[type="text"]:not([hidden]),
  input[type="password"]:not([hidden]),
  input.long:not([hidden]) {
    display: block;
    width: 100%;
  }
  
  button {
    min-height: 44px;
    min-width: 44px;
    font-size: 16px;
  }
  .header-nav {
    gap: 0.6em;
    margin-bottom: 1em;
  }
  .file-item {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4em;
  }
  .file-item span {
    width: 100%;
  }
  .file-item button {
    font-size: 1rem;
  }
  .upload-area {
    padding: 1.2em;
  }
  .tabs {
    flex-wrap: wrap;
  }
}

/* Специальные стили для iOS */
@supports (-webkit-touch-callout: none) {
  button {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    touch-action: manipulation;
  }
}

input[type="file"] {
  margin: 0.5em 0;
}

button,
input[type="submit"],
input[type="file"]::file-selector-button {
  margin: 0.5em 0;
  font-family: var(--font-family);
  background-color: var(--accent);
  display: inline-block;
  color: white;
  padding: 0.4em 1em;
  border: none;
  box-shadow:
    0 var(--button-shadow-size) 0 0 var(--button-shadow-light) inset,
    var(--button-shadow-size) 0 0 0 var(--button-shadow-light) inset,
    0 calc(-1 * var(--button-shadow-size)) 0 0 var(--button-shadow-dark) inset,
    calc(-1 * var(--button-shadow-size)) 0 0 0 var(--button-shadow-dark) inset,
    0 0 0 var(--button-highlight-size) black;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  touch-action: manipulation;
  -webkit-appearance: none;
  border-radius: 0;
}

input[type="file"]::file-selector-button {
  margin-right: 0.5em;
}

textarea,
select {
  background: #000;
  color: #fff;
  border: var(--input-border-width) solid var(--accent);
  font-family: var(--font-family);
}

textarea::placeholder {
  color: #fff;
  opacity: 0.75;
}

textarea {
  padding: 0.5em;
  resize: vertical;
}

textarea:focus,
input[type="text"]:focus,
input[type="password"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent-light);
}

button:hover:not(:disabled),
input[type="submit"]:hover:not(:disabled),
input[type="file"]::file-selector-button:hover {
  box-shadow:
    0 var(--button-shadow-size) 0 0 var(--button-shadow-light) inset,
    var(--button-shadow-size) 0 0 0 var(--button-shadow-light) inset,
    0 calc(-1 * var(--button-shadow-size)) 0 0 var(--button-shadow-dark) inset,
    calc(-1 * var(--button-shadow-size)) 0 0 0 var(--button-shadow-dark) inset,
    0 0 0 var(--button-highlight-size) var(--accent-light);
}

button:active:not(:disabled),
input[type="submit"]:active:not(:disabled),
input[type="file"]::file-selector-button:active {
  box-shadow:
    0 var(--button-shadow-size) 0 0 var(--button-shadow-dark) inset,
    var(--button-shadow-size) 0 0 0 var(--button-shadow-dark) inset,
    0 calc(-1 * var(--button-shadow-size)) 0 0 var(--button-shadow-light) inset,
    calc(-1 * var(--button-shadow-size)) 0 0 0 var(--button-shadow-light) inset,
    0 0 0 var(--button-highlight-size) var(--accent-light);
}

button.secondary {
  background: var(--accent-light);
  color: var(--accent-dark);
}

button.danger {
  background: #d32f2f;
  color: white;
}

.file-actions {
  margin-bottom: 1em;
  display: flex;
  gap: 0.5em;
  flex-wrap: wrap;
}

input[type="file"] {
  margin: 0.5em 0;
}

#background {
  z-index: -1;
  position: fixed;
  inset: 0;
  pointer-events: none;
}

#content {
  max-width: 800px;
  padding: 1em;
  margin: auto;
  padding-bottom: calc(1em + env(safe-area-inset-bottom));
}

.file-item {
  display: flex;
  align-items: center;
  gap: 1em;
  padding: 0.5em;
  border: 1px solid var(--accent);
  margin: 0.5em 0;
}

.file-item span {
  flex: 1;
}

.file-item button {
  margin: 0;
  padding: 0.2em 0.5em;
  font-size: 0.8em;
}

.success-message {
  color: lime;
}

.error-message {
  color: lightcoral;
}

#background {
  z-index: -1;
  position: fixed;
  inset: 0;
  background: linear-gradient(45deg, #000 0%, #111 50%, #000 100%);
}

#content {
  max-width: 800px;
  padding: 1em;
  margin: auto;
  position: relative;
  z-index: 1;
}

.tabs {
  display: flex;
  gap: 0.5em;
  margin: 0.5em 0 1em;
}
.tab-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent-lighter);
}
.tab-btn.active {
  background: var(--accent);
  color: white;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 1em;
  padding: 0.5em;
  border: 1px solid var(--accent);
  margin: 0.5em 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.file-item span {
  flex: 1;
}

.file-item button {
  margin: 0;
  padding: 0.2em 0.5em;
  font-size: 0.8em;
}

.file-item:hover {
  background: rgba(0, 0, 0, 0.5);
  border-color: var(--accent-light);
}

.file-actions {
  display: flex;
  gap: 0.5em;
  flex-wrap: wrap;
}

.upload-area {
  border: 2px dashed var(--accent);
  padding: 2em;
  text-align: center;
  margin: 1em 0;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
}

.upload-area:hover {
  border-color: var(--accent-light);
  background: rgba(0, 0, 0, 0.3);
}

.upload-area.dragover {
  border-color: var(--accent-light);
  background: rgba(0, 0, 0, 0.4);
}

.status-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.5em;
}

.status-indicator.online {
  background: lime;
  box-shadow: 0 0 10px lime;
}

.status-indicator.offline {
  background: red;
  box-shadow: 0 0 10px red;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.upload-progress {
  margin-top: 1em;
  padding: 1em;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--accent);
  border-radius: 8px;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--accent-light);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 50%, var(--accent) 100%);
  background-size: 200% 100%;
  animation: progressShine 2s ease-in-out infinite;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  text-align: center;
  margin-top: 0.5em;
  font-family: var(--font-family);
  color: var(--accent-light);
}

@keyframes progressShine {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.version-display {
  position: fixed;
  top: 1em;
  right: 1em;
  font-family: var(--font-family);
  font-size: 0.8rem;
  color: var(--accent-light);
  background: rgba(0, 0, 0, 0.7);
  padding: 0.3em 0.6em;
  border: 1px solid var(--accent);
  border-radius: 4px;
  z-index: 1000;
  pointer-events: none;
}