@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;600;700&family=Quicksand:wght@500;600;700&display=swap');

:root {
  --ball-size: 40px;
  --primary-color: #8fb7ff;
  --secondary-color: #ffc6d9;
  --accent-color: #b9f4d6;
  --background-color: #f7f2ff;
  --card-color: #fff7fb;
  --text-color: #3e3e55;
  --white: #fff;
  --soft-shadow: 0 12px 30px rgba(120, 96, 150, 0.15);
  --page-bg-1: #fff0f7;
  --page-bg-2: #f7f2ff;
  --page-bg-3: #f2f9ff;
  --card-bg-1: #fff7fb;
  --card-bg-2: #f7fffb;
  --title-color: #6f7fe5;
  --border-color: rgba(150, 140, 190, 0.15);
  --set-bg: rgba(255, 255, 255, 0.65);
  --history-bg: #fdf7ff;
  --ball-text: #4a4a6a;
}

body {
  background: radial-gradient(circle at top left, var(--page-bg-1), var(--page-bg-2) 45%, var(--page-bg-3) 90%);
  font-family: 'Noto Sans KR', 'Quicksand', 'Verdana', sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
  color: var(--text-color);
  line-height: 1.7;
}

/* --- General & Layout --- */

.container {
  background: linear-gradient(160deg, var(--card-bg-1), var(--card-bg-2));
  padding: 30px 40px;
  border-radius: 20px;
  box-shadow: var(--soft-shadow);
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--border-color);
  text-align: left;
}

main {
  padding: 20px 0;
}

h1, h2, h3 {
  color: var(--title-color);
  font-weight: 700;
  margin-top: 0;
  letter-spacing: -0.5px;
}

h1 {
  font-size: 2.2rem;
}

h2 {
  font-size: 1.8rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 15px;
  margin-bottom: 20px;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--secondary-color);
}

section, .history-section {
  margin-bottom: 40px;
  padding: 20px;
  background: var(--set-bg);
  border-radius: 16px;
  border: 1px solid rgba(170, 160, 210, 0.2);
}

/* --- Header & Navigation --- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.logo-title h1 a {
  color: var(--title-color);
  text-decoration: none;
}

.navigation {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.navigation a {
  font-weight: 600;
  color: var(--text-color);
}

.theme-toggle {
  background: linear-gradient(135deg, #ffeaf4, #e8f1ff);
  color: #4a4a6a;
  border: 1px solid rgba(170, 160, 210, 0.35);
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(140, 120, 180, 0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(140, 120, 180, 0.2);
}

/* --- Home Page Sections --- */
.hero-section {
  text-align: center;
  font-size: 1.1rem;
  padding: 30px;
}

.usage-guide ol {
  padding-left: 20px;
}
.usage-guide li {
  margin-bottom: 10px;
}

.article-section, .responsible-gaming-disclaimer {
  background: transparent;
  border: none;
  padding: 0;
}

.article-section p, .responsible-gaming-disclaimer p {
  color: var(--text-color);
  opacity: 0.9;
}

/* --- Lotto Generator --- */
.lotto-generator-section {
  text-align: center;
  margin-bottom: 40px;
}

.lotto-sets {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 30px;
}

.lotto-set {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--set-bg);
  border-radius: 16px;
  border: 1px solid rgba(170, 160, 210, 0.2);
}

.lotto-balls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.set-label {
  font-weight: 700;
  color: #6f7fe5;
  min-width: 60px;
  text-align: left;
}

.ball {
  width: var(--ball-size);
  height: var(--ball-size);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--ball-text);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  box-shadow: 0 6px 15px rgba(140, 120, 180, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.7);
  transition: transform 0.3s ease, background 0.3s ease;
  transform: scale(0);
  animation: popIn 0.5s ease forwards;
}

.ball.bonus {
  background: linear-gradient(135deg, #ffe6a7, #ffc3a0);
  color: #6a3f2c;
}

@keyframes popIn {
  to {
    transform: scale(1);
  }
}

#generator-btn {
  background: linear-gradient(135deg, var(--primary-color), #c9ddff);
  color: #2f3a6b;
  border: none;
  padding: 15px 30px;
  font-size: 1.15rem;
  font-weight: bold;
  letter-spacing: 0.3px;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  box-shadow: 0 10px 20px rgba(120, 120, 170, 0.2);
}

#generator-btn:hover {
  background: linear-gradient(135deg, #a6c8ff, #d8e7ff);
  transform: translateY(-2px);
}

.copy-set-btn {
  background: linear-gradient(135deg, var(--accent-color), #e6fff3);
  color: #2f5a4a;
  border: none;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(120, 170, 150, 0.18);
  white-space: nowrap;
}

.copy-set-btn:hover {
  transform: translateY(-2px);
}

/* --- History --- */

.history-section {
  padding: 20px;
  margin-top: 40px;
}

#history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 250px;
  overflow-y: auto;
}

#history-list li {
  background-color: var(--history-bg);
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 10px;
  font-size: 0.95rem;
  border: 1px solid rgba(180, 160, 210, 0.2);
  line-height: 1.5;
}

/* --- Content Pages (About, Contact, Privacy) --- */
.content-page {
  padding: 20px;
}

.content-page p {
  margin-bottom: 15px;
}

.content-page ul {
  padding-left: 20px;
}

.content-page li {
  margin-bottom: 10px;
}

.contact-info {
  margin: 30px 0;
  font-size: 1.1rem;
}


/* --- Footer --- */
.footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-color);
  opacity: 0.8;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
}

.footer-links a {
  font-size: 0.9rem;
}


/* --- Dark Theme --- */
body[data-theme='dark'] {
  --primary-color: #6b8cff;
  --secondary-color: #ff9fb8;
  --accent-color: #7be9c3;
  --background-color: #141625;
  --card-color: #1c2034;
  --text-color: #f1f3ff;
  --page-bg-1: #1a1c2c;
  --page-bg-2: #121423;
  --page-bg-3: #101525;
  --card-bg-1: #1c2034;
  --card-bg-2: #202743;
  --title-color: #cbd5ff;
  --border-color: rgba(120, 140, 210, 0.2);
  --set-bg: rgba(28, 32, 52, 0.75);
  --history-bg: #1a1f36;
  --ball-text: #1b2136;
  --soft-shadow: 0 16px 32px rgba(10, 12, 24, 0.45);
}

body[data-theme='dark'] a {
  color: var(--primary-color);
}
body[data-theme='dark'] a:hover {
  color: var(--secondary-color);
}
body[data-theme='dark'] .navigation a {
  color: var(--text-color);
}

body[data-theme='dark'] .theme-toggle {
  background: linear-gradient(135deg, #2a314e, #1f2844);
  color: #e6e9ff;
  border-color: rgba(120, 140, 210, 0.4);
}

body[data-theme='dark'] #generator-btn,
body[data-theme='dark'] .copy-set-btn {
  color: #1b2136;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  h1 {
    font-size: 1.8rem;
  }
  h2 {
    font-size: 1.5rem;
  }
  .header {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }
  .logo-title {
    order: 1;
  }
  .navigation {
    order: 3;
    width: 100%;
    justify-content: center;
  }
  .theme-toggle {
    order: 2;
  }
  .lotto-set {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 10px;
  }
  .container {
    padding: 15px;
  }
  .lotto-balls {
    gap: 5px;
  }
  .ball {
    --ball-size: 35px;
    font-size: 1rem;
  }
  .navigation {
    gap: 15px;
  }
  .navigation a {
    font-size: 0.9rem;
  }
}