:root {
  --bg-dark: #101218;
  --surface-dark: #171c24;
  --text-dark: #f1f3f8;
  --muted-dark: #b4bccb;
  --line-dark: #2d3442;
  --accent-dark: #ddd7ce;
  --bg-light: #f7f6f2;
  --surface-light: #ffffff;
  --text-light: #151515;
  --muted-light: #585858;
  --line-light: #d8d8d2;
  --accent-light: #111111;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-dark);
  transition: background-color 0.2s ease, color 0.2s ease;
}

body.light {
  background: var(--bg-light);
  color: var(--text-light);
}

#maincontent {
  width: min(calc(100% - 2rem), 760px);
  margin: 3.5rem auto;
  padding: 1.6rem;
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  background: var(--surface-dark);
}

body.light #maincontent {
  border-color: var(--line-light);
  background: var(--surface-light);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--muted-dark);
  text-decoration: none;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}

body.light .back-link {
  color: var(--muted-light);
}

.back-link:hover {
  text-decoration: underline;
}

.back-link svg {
  width: 0.8rem;
  height: 0.8rem;
  fill: currentColor;
}

h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.8rem, 3.4vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 1rem;
  color: var(--muted-dark);
  line-height: 1.55;
}

body.light p {
  color: var(--muted-light);
}

.pricing-note {
  margin-bottom: 1rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  color: var(--text-dark);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.95rem;
}

body.light .pricing-note {
  border-color: var(--line-light);
  color: var(--text-light);
  background: rgba(17, 17, 17, 0.04);
}

form {
  display: grid;
  gap: 0.9rem;
}

label {
  display: block;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
  color: var(--muted-dark);
}

body.light label {
  color: var(--muted-light);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.72rem 0.76rem;
  border: 1px solid var(--line-dark);
  border-radius: 8px;
  background: #0f1218;
  color: var(--text-dark);
  font: inherit;
}

body.light input,
body.light textarea,
body.light select {
  border-color: var(--line-light);
  background: #fff;
  color: var(--text-light);
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid transparent;
  border-color: var(--accent-dark);
}

body.light input:focus,
body.light textarea:focus,
body.light select:focus {
  border-color: var(--accent-light);
}

button[type="submit"],
.button-link {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.66rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--accent-dark);
  color: var(--text-dark);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  font-size: 0.88rem;
}

body.light button[type="submit"],
body.light .button-link {
  border-color: var(--accent-light);
  color: var(--text-light);
}

button[type="submit"]:hover,
.button-link:hover {
  opacity: 0.85;
}

.toast {
  margin-top: 0.9rem;
  font-size: 0.88rem;
  color: var(--accent-dark);
  opacity: 0;
  transition: opacity 0.2s ease;
}

body.light .toast {
  color: var(--accent-light);
}

.toast.visible {
  opacity: 1;
}

.success-message {
  display: none;
  margin-top: 1rem;
}

[data-form-wrapper].is-submitted form {
  display: none;
}

[data-form-wrapper].is-submitted .success-message {
  display: block;
}

.toggle-btn {
  position: fixed;
  top: 0.9rem;
  right: 0.9rem;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.32rem 0.58rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  background: var(--surface-dark);
  color: var(--text-dark);
  cursor: pointer;
}

body.light .toggle-btn {
  border-color: var(--line-light);
  background: var(--surface-light);
  color: var(--text-light);
}

.toggle-icon {
  font-size: 0.74rem;
}

.toggle-switch {
  width: 1.7rem;
  height: 0.9rem;
  border-radius: 999px;
  background: #333a4a;
  position: relative;
}

.toggle-switch::before {
  content: "";
  position: absolute;
  top: 0.12rem;
  left: 0.14rem;
  width: 0.66rem;
  height: 0.66rem;
  border-radius: 50%;
  background: var(--accent-dark);
  transition: transform 0.2s ease;
}

body.light .toggle-switch {
  background: #d7dae1;
}

body.light .toggle-switch::before {
  transform: translateX(0.76rem);
  background: var(--accent-light);
}

@media (max-width: 700px) {
  #maincontent {
    width: min(calc(100% - 1rem), 760px);
    margin: 3rem auto 1.2rem;
    padding: 1.1rem;
  }
}