/* Reset */
* { box-sizing: border-box; }

:root{
  --base-font: 20px;
  --button-padding: 18px 30px;
  --input-padding: 12px 14px;
  --container-max: 1200px;
  
  /* Dark mode (default) */
  --bg-primary: black;
  --text-primary: white;
  --accent-color: palegoldenrod;
  --bg-secondary: #222;
  --border-color: palegoldenrod;
  --completed-color: palegoldenrod;
}

html[data-theme="light"] {
  --bg-primary: white;
  --text-primary: black;
  --accent-color: RebeccaPurple;
  --bg-secondary: #f5f5f5;
  --border-color: RebeccaPurple;
  --completed-color: RebeccaPurple;
}

/* Page layout: center content horizontally and stack vertically */
body {
  background-color: var(--bg-primary);
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color: var(--text-primary);
  text-align: center;
  font-size: var(--base-font);
  transition: background-color 0.3s, color 0.3s;
}
 
/* Central content container */
.container-lg {
  width: 100%;
  max-width: var(--container-max);
  text-align: center;
  padding: 12px;
 }

h1 { color: var(--text-primary); margin: 0 0 12px; font-size: 2.6rem; }
h3 { color: var(--accent-color); margin: 0 0 20px; font-size: 1.6rem; }
 
/* Image */
img {
  display: block;
  margin: 18px auto;
  max-width: 300px;
  width: 45%;
  height: auto;
}

/* Buttons */
button {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  padding: var(--button-padding);
  margin: 14px 10px;
  font-size: 1.35rem;
  border-radius: 10px;
  min-width: 160px;
  transition: background-color 0.3s, color 0.3s;
}

/* Theme toggle button */
#themeToggle {
  padding: 10px 15px;
  margin: 0;
  min-width: auto;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Custom mode button */
#customModeBtn {
  padding: 10px 15px;
  margin: 0;
  min-width: auto;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Login form: hidden/show states */
#loginForm.hidden { display: none; }
#loginForm.show { display: block; }

#loginForm {
  margin: 18px auto;
  color: var(--text-primary);
  text-align: center;
}

#loginForm p { margin: 10px 0; font-size: 1.15rem; }
input[type="text"], input[type="password"], input[type="number"], select { 
  padding: var(--input-padding); 
  font-size: 1.1rem; 
  border-radius: 6px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

select {
  width: 100%;
  max-width: 540px;
}

#timerSetup label {
  display: block;
  text-align: left;
  margin-bottom: 16px;
}

#timerSetup .assignment-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 16px;
}

#timerSetup .assignment-row label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0;
}

#customModeDialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--accent-color);
  border-radius: 14px;
  box-shadow: 0 0 40px rgba(0,0,0,0.35);
  padding: 24px;
  z-index: 1001;
  width: min(92vw, 520px);
  display: none;
}

#customModeDialog h3 {
  margin-top: 0;
  margin-bottom: 18px;
  color: var(--accent-color);
}

#customModeOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: none;
}

.color-picker-row {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.color-picker-row label {
  display: grid;
  gap: 8px;
  text-align: left;
  font-size: 1rem;
}

.color-picker-row input[type="color"] {
  width: 100%;
  height: 50px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: none;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 20px;
}

#timerSetup .assignment-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 16px;
}

#timerSetup .assignment-row label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0;
}

#assignmentName {
  width: 100%;
  max-width: 520px;
  box-sizing: border-box;
}

#assignmentHistory {
  display: none;
}

/* Timer display larger */
#timerDisplay { font-size: 4rem; margin: 18px 0; font-weight: 700; }

/* Progress bar styling */
#progressBarContainer {
  width: 100%;
  max-width: 500px;
  height: 30px;
  background-color: var(--bg-primary);
  border: 3px solid var(--text-primary);
  margin: 20px auto;
  border-radius: 8px;
  overflow: hidden;
  transition: background-color 0.3s, border-color 0.3s;
}

 /*Quality Of Life*/ #progressBarFill {
  height: 100%;
  background-color: var(--accent-color);
  width: 0%;
  transition: width 0.1s linear, background-color 0.3s;
}

/* Responsive tweaks */
@media (min-width: 900px) {
  img { width: 420px; }
}

@media (max-width: 720px) {
  button { width: 100%; max-width: 380px; font-size: 1.2rem; }
  img { width: 70%; }
  :root{ --base-font: 18px; }
}

/* Enter button visibility (hidden until login click) */
#enterBtn.hidden { display: none; }
#enterBtn.show { display: inline-block; }

/* Blank input indicator */
.blank { color: #b30000; }
.blank::placeholder { color: #b30000; }
#loginError { color: #ff6b6b; margin-top: 8px; font-weight: 600; }

/* Page border: fill the viewport corners */
/* Ensure the document can grow and the border follows its size */
html, body { height: auto; min-height: 100%; }
html { border: 12px solid var(--accent-color); transition: border-color 0.3s; }
body { border-radius: 0; box-sizing: border-box; }

/* Filter section styling for light mode */
#filterSection {
  background-color: var(--bg-secondary) !important;
  border-color: var(--border-color) !important;
  transition: background-color 0.3s, border-color 0.3s;
}

#filterSection h3 {
  color: var(--accent-color) !important;
}

#filterSection label {
  color: var(--text-primary) !important;
}

#filterSection input {
  border-color: var(--border-color) !important;
}

#filterSection button {
  color: var(--text-primary) !important;
  background-color: #666 !important;
  transition: background-color 0.3s;
}

html[data-theme="light"] #filterSection button {
  background-color: #999 !important;
}

#log .completed {
  color: var(--completed-color);
  font-weight: 700;
}

#themeControls {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 10px;
  align-items: center;
}

#logo {
  width: 50%;
  height: auto;
}