@import url('https://fonts.googleapis.com/css2?family=Nanum+Gothic:wght@400;700&display=swap');

/* --- Color Variables --- */
:root {
  --bg-color: #f0f2f5;
  --text-color: #333;
  --subtle-text-color: #555;
  --accent-color: #667eea;
  --container-bg: white;
  --header-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #343a40;
  --footer-text-color: #ccc;
  --border-color: #eee;
  --interactive-bg: #f8f9fa;
  --shadow-color: rgba(0,0,0,0.1);
  --toggle-icon: '🌙';
}

body.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --subtle-text-color: #a0a0a0;
  --accent-color: #8a9cff;
  --container-bg: #1e1e1e;
  --header-bg: rgba(30, 30, 30, 0.85);
  --footer-bg: #1a1a1a;
  --footer-text-color: #a0a0a0;
  --border-color: #333;
  --interactive-bg: #2a2a2a;
  --shadow-color: rgba(0,0,0,0.4);
  --toggle-icon: '☀️';
}

/* --- General & Reset --- */
body {
  font-family: 'Nanum Gothic', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding-top: 80px; /* Space for fixed header */
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: var(--accent-color);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

h1, h2 {
  color: var(--text-color);
  margin-top: 0;
  text-align: center;
}

/* --- Header & Navigation --- */
.site-header {
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px var(--shadow-color);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color 0.3s;
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
  height: 80px;
}
.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-color);
}
.logo:hover { text-decoration: none; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 25px; }
.site-nav a {
  font-size: 16px;
  font-weight: 700;
  color: var(--subtle-text-color);
  padding: 10px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.3s, border-bottom-color 0.3s;
}
.site-nav a:hover { color: var(--accent-color); text-decoration: none; }
.site-nav a.active { color: var(--accent-color); border-bottom-color: var(--accent-color); }

/* --- Dark Mode Toggle --- */
.dark-mode-toggle {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: 0 10px;
}
.dark-mode-toggle::after {
  content: var(--toggle-icon);
}

/* --- Main Content --- */
.main-content { padding: 40px 20px; }
.container {
  background-color: var(--container-bg);
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 10px 25px var(--shadow-color);
  max-width: 820px;
  margin: 0 auto 30px auto;
  transition: background-color 0.3s;
}

/* --- Content Styling --- */
.site-description { font-size: 18px; color: var(--subtle-text-color); margin: -15px auto 40px auto; text-align: center; max-width: 90%; }
.tool-article, .comments-section { margin-bottom: 40px; border-top: 1px solid var(--border-color); padding-top: 40px; }
.tool-description { color: #aaa; margin-bottom: 30px; text-align: center; }
.text-container { text-align: left; line-height: 1.8; }
.text-container h2 { border-bottom: 2px solid var(--border-color); padding-bottom: 10px; }

/* --- Lotto Generator & Lucky Day Finder --- */
.lotto-numbers { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.lotto-number {
  width: 50px; height: 50px; border-radius: 50%; display: flex;
  justify-content: center; align-items: center; font-size: 20px;
  font-weight: bold; color: white; background-color: #adb5bd;
  box-shadow: inset 0 -3px 5px rgba(0,0,0,0.2);
}
.lotto-machine, .lucky-day-result { background-color: var(--interactive-bg); border-radius: 10px; padding: 20px; transition: background-color 0.3s; }
.lotto-machine { margin-bottom: 30px; }
.lucky-day-finder { text-align: center; }
.lucky-day-result { min-height: 50px; font-size: 18px; font-weight: bold; line-height: 1.6; }
.disclaimer { font-size: 12px; color: #888; }
.birthdate-input-group { display: flex; justify-content: center; align-items: center; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.birthdate-input-group label { font-weight: bold; color: var(--subtle-text-color); }
.birthdate-input-group input[type="date"] {
  padding: 8px; border: 1px solid var(--border-color); border-radius: 8px;
  font-size: 16px; background-color: var(--bg-color); color: var(--text-color);
}

/* --- AdSense & Comments --- */
.ads-container { margin: 40px auto; text-align: center; }
.comments-section h2 { text-align: center; }

/* --- Contact Form --- */
.contact-form { display: flex; flex-direction: column; gap: 20px; text-align: left; }
.form-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(--subtle-text-color); }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px; border: 1px solid var(--border-color);
  border-radius: 8px; font-size: 16px; box-sizing: border-box;
  background-color: var(--interactive-bg); color: var(--text-color);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent-color); outline: none; }

/* --- Buttons --- */
.generate-btn {
  background: linear-gradient(45deg, var(--accent-color), #764ba2);
  color: white;
  border: none;
  padding: 15px 30px;
  font-size: 18px;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-color);
  display: block;
  margin: 20px auto;
  text-align: center;
}
.generate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--shadow-color);
}
#find-lucky-day-btn {
  display: inline-block; /* Override display:block */
  margin: 0; /* Reset auto margins */
  padding: 10px 20px;
  font-size: 16px;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--footer-bg);
  color: var(--footer-text-color);
  padding: 30px 20px;
  text-align: center;
  margin-top: 40px;
  transition: background-color 0.3s, color 0.3s;
}
.footer-content a { color: white; }
body.dark-mode .footer-content a { color: var(--accent-color); }

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  body { padding-top: 70px; }
  .header-content { height: 70px; padding: 0 15px; }
  .logo { font-size: 20px; }
  .site-nav ul { gap: 15px; }
  .site-nav a { font-size: 14px; }
  .dark-mode-toggle { font-size: 20px; }

  .main-content { padding: 20px 10px; }
  .container { padding: 20px; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }

  .birthdate-input-group { flex-direction: column; }
  .lotto-number { width: 40px; height: 40px; font-size: 16px; }
}