:root {
  --bg: #f4f4f4;
  --text: #111;
  --input: #fff;
  --border: #ccc;
  --primary: #007bff;
  --font-size: 1rem;
  --form-scale: 1.5;
}

.theme-dark {
  --bg: #0d0f17;
  --text: #f4f4f4;
  --input: #1c1e26;
  --border: #333;
  --primary: #29d3e2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  transition: background 0.3s, color 0.3s;
  font-size: calc(var(--font-size) * var(--form-scale));
}

#particles-js {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

main {
  background: var(--input);
  padding: 2rem;
  border-radius: 12px;
  width: min(90vw, 600px);
  min-width: 320px;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.4);
}

h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

form label {
  display: block;
  margin-top: 1rem;
  font-weight: bold;
}

input, select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-top: 0.3rem;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

button.generate {
  background: var(--primary);
  color: var(--bg);
  font-size: var(--font-size);
  border: none;
  margin-top: 1.5rem;
  width: 100%;
  padding: 1rem;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
}

.input-group {
  display: flex;
  align-items: center;
}

.input-group input {
  flex: 1;
  margin-right: 0.5rem;
}

.input-group button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  font-size: 1.2rem;
}

#output-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

#output-container input {
  flex: 1;
  padding: 0.6em 1em;
  border-radius: 0.4em;
  border: 1px solid var(--border);
  background-color: var(--input-bg);
  color: var(--text-color, --text);
  font-size: var(--font-size)*1.1;
  text-align: center;
}

#output-container button {
  background-color: var(--input);
  border: none;
  padding: 0.6em 0.8em;
  border-radius: 0.4em;
  cursor: pointer;
  color: var(--text);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
}

#output-container button:hover {
  background-color: var(--accent-color-hover, #00aacc);
}


/* theme toggle */

#theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.2rem;
  color: var(--text);
  cursor: pointer;
}

details summary {
  cursor: pointer;
  margin-top: 1rem;
  font-weight: bold;
  color: var(--primary);
}

.hidden {
  display: none;
}


/* About section */

.about-link {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--accent-color, #00cfff);
  border: none;
  padding: 0.6em 1em;
  border-radius: 0.4em;
  font-size: 0.95rem;
  color: white;
  cursor: pointer;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0.4em;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(3px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 999;
}

.modal-content {
  background: var(--form-bg, #1f1f1f);
  padding: 2rem;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  color: var(--text-color, #fff);
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.4);
  position: relative;
}

.close {
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  font-size: 1.5rem;
  color: var(--text-color, #ccc);
  cursor: pointer;
}

.modal.hidden {
  display: none;
}

.modal a {
  color: var(--accent-color, #00cfff);
  text-decoration: underline;
}


/* slongan */

.slogan {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted, #aaa);
  margin-top: -0.5rem;
  margin-bottom: 1.5rem;
  transition: opacity 0.8s ease;
  height: 1.5em;
  text-align: center;
}

/* privacy note */

.privacy-note {
  font-size: 0.85rem;
  color: var(--text-muted, #aaa);
  text-align: center;
  margin-top: 1rem;
  font-style: italic;
}

.footer-note {
  font-size: 0.75rem;
  text-align: center;
  margin-top: 2rem;
  color: var(--text-muted);
  font-style: italic;
}
.footer-note a {
  color: inherit;
  text-decoration: underline;
}