:root {
  /* Light theme default variables */
  --link-color: #6193a4;
  --background-color: #ffffff;
  --text-color: #333333;
  --header-background: transparent;
  --border-color: darkgray;
  --light-border-color: lightgray;
  --button-gradient-start: #4d94ff;
  --button-gradient-end: #0066cc;
  --button-border: #0052a3;
  --button-shadow-color: #00408f;
  --hole-border-color: darkgray;
  --peg-border-color: darkgray;
  --dialog-background: white;
  --color-chooser-background: white;
  --disabled-button-gradient-start: #a3c2f0;
  --disabled-button-gradient-end: #6699cc;
  --disabled-button-text: #dddddd;
  --disabled-button-shadow: #5588bb;
}

/* Explicit light theme */
html[data-theme="light"] {
  --link-color: #6193a4;
  --background-color: #ffffff;
  --text-color: #333333;
  --header-background: transparent;
  --border-color: darkgray;
  --light-border-color: lightgray;
  --button-gradient-start: #4d94ff;
  --button-gradient-end: #0066cc;
  --button-border: #0052a3;
  --button-shadow-color: #00408f;
  --hole-border-color: darkgray;
  --peg-border-color: darkgray;
  --dialog-background: white;
  --color-chooser-background: white;
  --disabled-button-gradient-start: #a3c2f0;
  --disabled-button-gradient-end: #6699cc;
  --disabled-button-text: #dddddd;
  --disabled-button-shadow: #5588bb;
}

/* Dark theme via attribute - highest precedence */
html[data-theme="dark"] {
  --link-color: #78b6ca;
  --background-color: #1e1e1e;
  --text-color: #e0e0e0;
  --header-background: #2d2d2d;
  --border-color: #555555;
  --light-border-color: #444444;
  --button-gradient-start: #3a7dd6;
  --button-gradient-end: #0055aa;
  --button-border: #004386;
  --button-shadow-color: #003366;
  --hole-border-color: #555555;
  --peg-border-color: #555555;
  --dialog-background: #2d2d2d;
  --color-chooser-background: #2d2d2d;
  --disabled-button-gradient-start: #5f7ca6;
  --disabled-button-gradient-end: #496282;
  --disabled-button-text: #999999;
  --disabled-button-shadow: #405070;
}

/* Dark theme via media query - lower precedence */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --link-color: #78b6ca;
    --background-color: #1e1e1e;
    --text-color: #e0e0e0;
    --header-background: #2d2d2d;
    --border-color: #555555;
    --light-border-color: #444444;
    --button-gradient-start: #3a7dd6;
    --button-gradient-end: #0055aa;
    --button-border: #004386;
    --button-shadow-color: #003366;
    --hole-border-color: #555555;
    --peg-border-color: #555555;
    --dialog-background: #2d2d2d;
    --color-chooser-background: #2d2d2d;
    --disabled-button-gradient-start: #5f7ca6;
    --disabled-button-gradient-end: #496282;
    --disabled-button-text: #999999;
    --disabled-button-shadow: #405070;
  }
}

body {
  background-color: var(--background-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: var(--link-color);
}

header {
  margin: 25px auto;
  width: 350px;
  background-color: var(--header-background);
  border-radius: 8px;
  padding: 5px;
}

header > h1 {
  margin: 0;
  padding: 0;
  text-align: center;
  font-size: 40px;
  font-family: 'Sigmar One', courier;
}

header > h1 > a {
  text-decoration: none;
}

header > div {
  margin: 0 60px 0 0;
  float: right;
}

header > div > a {
  font-size: 12px;
  margin-left: 10px;
}

.mainPanel {
  width: 350px;
  margin: 0 auto;
  padding: 20px 0px;
}

.row {
  padding: 10px;
}

.checkButton {
  font-size: 100%;
  height: 55px;
  padding: 0 15px;
  font-weight: bold;
  color: white;
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.4);
  background: linear-gradient(to bottom, var(--button-gradient-start), var(--button-gradient-end));
  border: 2px solid var(--button-border);
  border-radius: 8px;
  box-shadow: 0 3px 0 var(--button-shadow-color), 0 5px 5px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: all 0.1s ease;
  position: relative;
}

.checkButton:hover {
  background: linear-gradient(to bottom, color-mix(in srgb, var(--button-gradient-start) 80%, white), var(--button-gradient-end));
  transform: translateY(-2px);
  box-shadow: 0 5px 0 var(--button-shadow-color), 0 7px 7px rgba(0, 0, 0, 0.2);
}

.checkButton:active {
  transform: translateY(3px);
  box-shadow: 0 0 0 var(--button-shadow-color), 0 1px 2px rgba(0, 0, 0, 0.2);
}

.checkButton:disabled {
  background: linear-gradient(to bottom, var(--disabled-button-gradient-start), var(--disabled-button-gradient-end));
  color: var(--disabled-button-text);
  cursor: not-allowed;
  box-shadow: 0 3px 0 var(--disabled-button-shadow), 0 5px 5px rgba(0, 0, 0, 0.1);
  transform: none;
}

.hole {
  margin: 5px;
  display: inline-block;
  border: 4px solid var(--hole-border-color);
  border-radius: 50%;
  width: 28px;
  height: 28px;
}

.peg {
  margin: 5px;
  display: inline-block;
  border: 4px solid var(--peg-border-color);
  border-radius: 50%;
  width: 28px;
  height: 28px;
}

.holes {
  display: inline-block;
  vertical-align: middle;
  padding-right: 12px;
}

.small {
  border-width: 2px;
  margin-left: 6px;
  width: 12px;
  height: 12px;
  cursor: auto;
}

.score {
  border-left: 1px solid var(--light-border-color);
  padding-left: 15px;
  display: inline-block;
  vertical-align: middle;
}

#colorChooser {
  display: none;
  padding: 5px;
  background-color: var(--color-chooser-background);
  position: absolute;
  border-radius: 5px;
  border: 1px solid var(--border-color);
  z-index: 1;
  cursor: default;
}

#dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 200px;
  margin-left: -100px;
  height: 100px;
  margin-top: -50px;

  background-color: var(--dialog-background);
  border-radius: 4px;
  border: 1px solid var(--border-color);
  padding: 24px;
  text-align: center;
}

.color {
  margin: 4px;
  display: inline-block;
  border-radius: 3px;
  width: 26px;
  height: 26px;
  cursor: pointer;
}

footer {
  padding-top: 30px;
  padding-bottom: 30px;
  margin: auto;
  width: 350px;
  font-size: 12px;
  vertical-align: middle;
  text-align: center;
}

footer > span {
  position: relative;
  top: 3px;
}

footer > a > img {
  vertical-align: middle;
  height: 20px;
}

footer > a {
  /* float: right; */ /* Remove this to allow centering */
}

table, th, td {
  padding: 5px 15px;
}

button {
  -moz-appearance: none;
}