/* Design tokens */
:root {
  --bg: #F7F4F4;
  --black: #000000;
  --white: #ffffff;
  --red: #D74040;
  --dark: #3D2424;
  --border: rgba(0,0,0,0.15);
  --font-body: 'Space Grotesk', sans-serif;
  --font-logo: 'Sree Krushnadevaraya', serif;
  --font-nav-btn: 'Syncopate', sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--black);
  line-height: 1.5;
}

/* Nav */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #F2F0E9;
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 60px;
  height: 80px;
  display: flex;
  align-items: center;
}

.logo {
  font-family: var(--font-logo);
  font-size: 36px;
  font-weight: 400;
  color: var(--black);
  line-height: 1;
}

/* Form page */
.form-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.form-header {
  margin-bottom: 48px;
}

.form-header h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 10px;
}

.form-header p {
  font-size: 17px;
  color: rgba(0,0,0,0.55);
  font-weight: 400;
}

/* Fieldsets */
fieldset {
  border: none;
  padding: 0;
  margin-bottom: 40px;
}

legend {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  width: 100%;
  display: block;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

/* Fields */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 13px;
  font-weight: 500;
  color: rgba(0,0,0,0.7);
}

.req {
  color: var(--red);
}

.optional {
  color: rgba(0,0,0,0.35);
  font-weight: 400;
}

/* Inputs & selects */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="number"],
select,
textarea {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  background: var(--white);
  border: 1px solid var(--border);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  color: var(--black);
  outline: none;
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
  border-radius: 0;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--red);
}

input::placeholder,
textarea::placeholder {
  color: rgba(0,0,0,0.3);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23000' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}

textarea {
  height: auto;
  padding: 12px 14px;
  resize: vertical;
}

/* $ prefix */
.input-prefix {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  background: var(--white);
  transition: border-color 0.15s;
}

.input-prefix:focus-within {
  border-color: var(--red);
}

.input-prefix span {
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 15px;
  color: rgba(0,0,0,0.4);
  border-right: 1px solid var(--border);
  background: #f5f5f5;
  flex-shrink: 0;
}

.input-prefix input {
  border: none;
  flex: 1;
  height: 46px;
}

.input-prefix input:focus {
  border-color: transparent;
}

/* Radios */
.radio-group {
  display: flex;
  gap: 24px;
  margin-top: 4px;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 400;
  color: var(--black);
}

.radio-label input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
  cursor: pointer;
  transition: border-color 0.15s;
  position: relative;
}

.radio-label input[type="radio"]:checked {
  border-color: var(--red);
}

.radio-label input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 50%;
}

/* Checkboxes */
.checkbox-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.checkbox-wrap {
  flex-wrap: wrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 400;
  color: var(--black);
  background: var(--white);
  border: 1px solid var(--border);
  padding: 8px 14px;
  transition: border-color 0.15s, background 0.15s;
  user-select: none;
}

.checkbox-label:has(input:checked) {
  border-color: var(--red);
  background: #fff5f5;
}

.checkbox-label input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  flex-shrink: 0;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  position: relative;
}

.checkbox-label input[type="checkbox"]:checked {
  border-color: var(--red);
  background: var(--red);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  top: 1px;
  left: 4px;
  width: 4px;
  height: 8px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

/* File upload */
.file-upload {
  position: relative;
}

.file-upload input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.file-label {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 16px;
  background: var(--white);
  border: 1px dashed rgba(0,0,0,0.25);
  cursor: pointer;
  font-size: 14px;
  color: rgba(0,0,0,0.5);
  transition: border-color 0.15s, color 0.15s;
}

.file-label:hover {
  border-color: var(--red);
  color: var(--red);
}

.file-upload input:focus + .file-label {
  border-color: var(--red);
}

/* Submit */
.btn-submit {
  width: 100%;
  height: 54px;
  margin-top: 8px;
  background: var(--black);
  color: var(--white);
  font-family: var(--font-nav-btn);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.08em;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-submit:hover {
  background: var(--dark);
}

/* Success */
.success {
  text-align: center;
  padding: 80px 24px;
}

.success-icon {
  width: 64px;
  height: 64px;
  background: var(--dark);
  color: white;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: 50%;
}

.success h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.success p {
  font-size: 17px;
  color: rgba(0,0,0,0.55);
  max-width: 400px;
  margin: 0 auto;
}

/* Footer */
footer {
  text-align: center;
  padding: 28px 24px;
  font-size: 13px;
  color: rgba(0,0,0,0.35);
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 640px) {
  nav {
    padding: 0 20px;
    height: 64px;
  }

  .logo {
    font-size: 24px;
  }

  .form-page {
    padding: 40px 20px 80px;
  }

  .form-header h1 {
    font-size: 28px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}