/* ============================================
   90s Retro Design System - DDNS Server
   ============================================ */

:root {
  --bg-silver: #C0C0C0;
  --bg-white: #FFFFFF;
  --bg-yellow: #FFFFCC;
  --fg-black: #000000;
  --fg-gray: #808080;
  --border-light: #FFFFFF;
  --border-dark: #808080;
  --border-black: #000000;
  --accent-blue: #0000FF;
  --accent-red: #FF0000;
  --accent-green: #00AA00;
  --accent-yellow: #FFFF00;
  --visited-purple: #800080;
  --titlebar-navy: #000080;
  --titlebar-gradient: #1084D0;
}

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

body {
  font-family: "MS Sans Serif", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 14px;
  background-color: var(--bg-silver);
  background-image:
    linear-gradient(45deg, #b8b8b8 25%, transparent 25%),
    linear-gradient(-45deg, #b8b8b8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #b8b8b8 75%),
    linear-gradient(-45deg, transparent 75%, #b8b8b8 75%);
  background-size: 4px 4px;
  background-position: 0 0, 0 2px, 2px -2px, -2px 0px;
  color: var(--fg-black);
  line-height: 1.5;
  min-height: 100vh;
}

.btn {
  padding: 8px 16px;
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #dfdfdf;
  background: var(--bg-silver);
  color: var(--fg-black);
  font-family: "MS Sans Serif", "Segoe UI", Tahoma, sans-serif;
  font-size: 14px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: none;
  text-align: center;
  display: inline-block;
  text-decoration: none;
}

.btn:hover {
  background: #d0d0d0;
}

.btn:active {
  border-color: #808080 #ffffff #ffffff #808080;
  box-shadow: inset 1px 1px 0 #404040, inset -1px -1px 0 #dfdfdf;
  transform: translate(1px, 1px);
}

.btn:focus-visible {
  outline: 2px dotted var(--fg-black);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent-blue);
  color: var(--bg-white);
  border-color: #5555ff #000080 #000080 #5555ff;
}

.btn-primary:hover {
  background: #0000dd;
}

.btn-success {
  background: var(--accent-green);
  color: var(--bg-white);
  border-color: #00ff00 #006600 #006600 #00ff00;
}

.btn-success:hover {
  background: #008800;
}

.btn-danger {
  background: var(--accent-red);
  color: var(--bg-white);
  border-color: #ff5555 #800000 #800000 #ff5555;
}

.btn-danger:hover {
  background: #cc0000;
}

.window {
  background: var(--bg-silver);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #dfdfdf;
}

.window-titlebar {
  background: linear-gradient(to right, var(--titlebar-navy), var(--titlebar-gradient));
  color: var(--bg-white);
  padding: 4px 8px;
  font-weight: bold;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.window-content {
  background: var(--bg-white);
  border: 2px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  box-shadow: inset 1px 1px 0 #404040, inset -1px -1px 0 #dfdfdf;
  padding: 16px;
}

.panel {
  background: var(--bg-silver);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  box-shadow: inset -1px -1px 0 #404040, inset 1px 1px 0 #dfdfdf;
  padding: 16px;
  margin-bottom: 16px;
}

.panel-inset {
  background: var(--bg-white);
  border: 2px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  box-shadow: inset 1px 1px 0 #404040, inset -1px -1px 0 #dfdfdf;
  padding: 12px;
}

input[type="text"],
input[type="password"],
select {
  padding: 4px 8px;
  border: 2px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  box-shadow: inset 1px 1px 0 #404040, inset -1px -1px 0 #dfdfdf;
  background: var(--bg-white);
  color: var(--fg-black);
  font-family: "MS Sans Serif", "Segoe UI", Tahoma, sans-serif;
  font-size: 14px;
  width: 100%;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus {
  outline: 2px dotted var(--fg-black);
  outline-offset: 2px;
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
  color: var(--fg-gray);
}

label {
  display: block;
  margin-bottom: 4px;
  font-weight: bold;
  font-size: 14px;
}

a {
  color: var(--accent-blue);
  text-decoration: underline;
}

a:visited {
  color: var(--visited-purple);
}

a:hover {
  color: var(--accent-red);
}

h1, h2, h3 {
  font-family: "Arial Black", Impact, Haettenschweiler, sans-serif;
  font-weight: 900;
  line-height: 1.2;
}

h1 {
  font-size: 32px;
  margin-bottom: 16px;
}

h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.hr-groove {
  border: none;
  height: 4px;
  background: linear-gradient(
    to bottom,
    #808080 0%, #808080 50%,
    #ffffff 50%, #ffffff 100%
  );
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-white);
  border: 2px solid var(--fg-gray);
}

th {
  background: var(--bg-silver);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  padding: 8px;
  text-align: left;
  font-weight: bold;
}

td {
  border: 2px solid var(--fg-gray);
  padding: 8px;
}

tr:nth-child(even) {
  background: #e8e8e8;
}

.navbar {
  background: var(--bg-silver);
  border-bottom: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  padding: 8px;
  margin-bottom: 16px;
}

.container {
  max-width: 1224px;
  margin: 0 auto;
  padding: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.alert {
  padding: 12px 16px;
  border: 2px solid;
  margin-bottom: 16px;
  font-weight: bold;
}

.alert-error {
  background: #ffcccc;
  border-color: var(--accent-red);
  color: #cc0000;
}

.alert-success {
  background: #ccffcc;
  border-color: var(--accent-green);
  color: #006600;
}

.text-center {
  text-align: center;
}

.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

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

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

.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }

.w-full {
  width: 100%;
}

::selection {
  background: var(--titlebar-navy);
  color: var(--bg-white);
}