:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #1c1e21;
  --color-text-muted: #5b6270;
  --color-border: #e5e7eb;
  --color-accent: #2563eb;
  --color-on-accent: #ffffff;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  line-height: 1.6;
}

header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--color-accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 20px 64px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.tagline {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 40px;
}

h2 {
  font-size: 1.3rem;
  margin-top: 40px;
  margin-bottom: 12px;
}

h3 {
  font-size: 1.05rem;
  margin-top: 24px;
  margin-bottom: 8px;
}

section p {
  margin: 0 0 12px;
}

section ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

section ul li {
  margin-bottom: 8px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.features li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 16px;
}

.features li strong {
  display: block;
  margin-bottom: 2px;
}

.contact {
  color: var(--color-text-muted);
}

.contact a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact a:hover {
  text-decoration: underline;
}

footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 20px 40px;
}

footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
}

footer a {
  color: var(--color-text-muted);
}

/* Hesap silme sayfası */

.summary {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 8px;
}

.summary li {
  padding-left: 20px;
  position: relative;
}

.summary li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.note {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 16px 0 0;
}

.note a {
  color: var(--color-accent);
}

.form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-weight: 600;
  font-size: 0.95rem;
}

.field input[type="text"],
.field input[type="tel"],
.field input[type="email"],
.field select,
.field textarea {
  width: 100%;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 12px;
}

.field textarea {
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
  border-color: var(--color-accent);
}

.field .hint {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.field.checkbox {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
}

.field.checkbox input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
}

.field.checkbox label {
  font-weight: 400;
  font-size: 0.95rem;
}

.form button {
  font: inherit;
  font-weight: 600;
  color: var(--color-on-accent);
  background: var(--color-accent);
  border: none;
  border-radius: 10px;
  padding: 14px 20px;
  cursor: pointer;
  width: 100%;
}

.form button:hover {
  filter: brightness(0.94);
}

.fallback {
  margin-top: 24px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.fallback a {
  color: var(--color-accent);
}

.fallback ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

@media (max-width: 520px) {
  header .inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 20px;
  }

  nav a {
    margin-left: 0;
    margin-right: 16px;
  }

  main {
    padding: 32px 20px 48px;
  }

  h1 {
    font-size: 1.6rem;
  }
}