/* Modern Light Theme CSS for Random Number Generator */

:root {
  --primary-color: #4a6fa5;
  --secondary-color: #6c9bcf;
  --accent-color: #ff6b6b;
  --background-color: #f8f9fa;
  --card-background: #ffffff;
  --text-color: #2d3748;
  --text-light: #718096;
  --border-color: #e2e8f0;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
  line-height: 1.6;
  position: relative;
}

body::before {
  content: "Click 'Question Mark' To Generate Random Number";
  position: absolute;
  top: 10%;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 1.5rem;
  color: var(--text-light);
  opacity: 0.4;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  pointer-events: none;
}

.generate.number {
  font-size: 6rem;
  width: 200px;
  height: 200px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--primary-color);
  cursor: pointer;
  margin-bottom: 2rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
  position: relative;
}

.generate.number:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: scale(1.05);
}

.generate.number:active {
  transform: scale(0.95);
}

.options {
  background-color: var(--card-background);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  width: 100%;
  max-width: 400px;
}

legend {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

label {
  font-weight: 500;
  margin-right: 0.5rem;
}

input[type="number"] {
  border: 2px solid var(--border-color);
  border-radius: 6px;
  padding: 0.5rem;
  width: 100px;
  margin-right: 1.5rem;
  font-size: 1rem;
  transition: var(--transition);
}

input[type="number"]:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
}

/* Collapsible section styling */
.wrap-collabsible {
  width: 100%;
  max-width: 600px;
}

.toggle {
  display: none;
}

.lbl-toggle {
  display: block;
  font-weight: 600;
  padding: 1rem;
  color: var(--primary-color);
  background-color: var(--card-background);
  cursor: pointer;
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.lbl-toggle:hover {
  color: var(--secondary-color);
}

.lbl-toggle::before {
  content: ' ';
  display: inline-block;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 5px solid currentColor;
  vertical-align: middle;
  margin-right: 0.7rem;
  transform: translateY(-2px);
  transition: transform 0.2s ease-out;
}

.toggle:checked + .lbl-toggle::before {
  transform: rotate(90deg) translateX(-3px);
}

.collapsible-content {
  max-height: 0px;
  overflow: hidden;
  transition: max-height 0.25s ease-in-out;
}

.toggle:checked + .lbl-toggle + .collapsible-content {
  max-height: 600px;
}

.toggle:checked + .lbl-toggle {
  border-bottom-right-radius: 0;
  border-bottom-left-radius: 0;
}

.collapsible-content .content-inner {
  background-color: var(--card-background);
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.article p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .generate.number {
    font-size: 4rem;
    width: 150px;
    height: 150px;
  }
  
  .options, .wrap-collabsible {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .generate.number {
    font-size: 3rem;
    width: 120px;
    height: 120px;
  }
  
  input[type="number"] {
    width: 80px;
    margin-right: 1rem;
  }
}