:root {
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --light-bg: #f9fafb;
  --light-text: #1f2937;
  --light-border: #e5e7eb;
  --dark-bg: #1f2937;
  --dark-text: #f3f4f6;
  --dark-border: #4b5563;
  --radius: 0.75rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* --- Temel Temalar --- */
html[data-theme="light"],
body[data-theme="light"] {
  background-color: var(--light-bg);
  color: var(--light-text);
}

html[data-theme="dark"],
body[data-theme="dark"] {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* --- Header --- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: var(--light-bg);
  border-bottom: 1px solid var(--light-border);
  box-shadow: var(--shadow-sm);
}
html[data-theme="dark"] .header {
  background: var(--dark-secondary, var(--dark-bg));
  border-bottom: 1px solid var(--dark-border);
}

/* --- Logo & Buton --- */
.logo {
  font-weight: bold;
  font-size: 18px;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.theme-toggle {
  background: transparent;
  border: none;
  font-size: 18px;
  color: var(--primary-dark);
  cursor: pointer;
}

/* --- İçerik Kutusu --- */
.terms-box {
  background: var(--light-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--light-border);
  padding: 40px;
  max-width: 850px;
}
html[data-theme="dark"] .terms-box {
  background: var(--dark-secondary, var(--dark-bg));
  border: 1px solid var(--dark-border);
}

/* --- Başlıklar, Metinler --- */
h1 {
  font-size: 28px;
  margin-bottom: 25px;
  color: var(--primary);
}
h2 {
  font-size: 20px;
  margin: 30px 0 10px;
  color: var(--primary-dark);
}
p, li {
  font-size: 15px;
  line-height: 1.6;
}
a {
  color: var(--primary);
  text-decoration: underline;
}

/* --- Footer --- */
footer {
  text-align: center;
  font-size: 14px;
  color: #888;
  padding: 30px 0 50px;
}
html[data-theme="dark"] footer {
  color: #aaa;
}

html[data-theme="dark"] .content {
  background: var(--dark-bg);
}

html[data-theme="dark"] .content {
  background: var(--dark-bg);
  color: var(--dark-text);
}