:root {
  --green-light: #a8e6c9;
  --green-mid: #4fae82;
  --green-dark: #1b7f5c;
  --ink: #2b3430;
  --paper: #fbfdfc;
  --paper-alt: #f0f6f3;
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(251,253,252,0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
  border-bottom: 1px solid #e4ece8;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
}

.brand-text {
  font-size: 14px;
  line-height: 1.25;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #5a655f;
}

.brand-text strong {
  display: block;
  font-size: 18px;
  color: var(--green-dark);
  letter-spacing: 0.06em;
}

/* buttons */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--green-light), var(--green-dark));
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(27,127,92,0.6);
}

.btn-primary:hover { transform: translateY(-1px); }

.btn-outline {
  border: 1.5px solid var(--green-dark);
  color: var(--green-dark);
  background: transparent;
}

.btn-outline:hover { background: var(--paper-alt); }

/* hero */
.hero {
  padding: 96px 0 88px;
  background: radial-gradient(circle at 80% 0%, #e4f5ec 0%, var(--paper) 55%);
}

.hero-inner {
  max-width: 720px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.25;
}

.hero-sub {
  font-size: 19px;
  color: #5a655f;
  margin-bottom: 36px;
}

/* for whom */
.for-whom {
  padding: 80px 0;
}

.for-whom h2 {
  font-size: 28px;
  margin-bottom: 40px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--paper-alt);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.card-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-light), var(--green-dark));
  margin-bottom: 18px;
}

.card p {
  margin: 0;
  font-size: 17px;
}

/* format */
.format {
  padding: 80px 0;
  background: var(--paper-alt);
}

.format h2 {
  font-size: 28px;
  margin-bottom: 40px;
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.format-item h3 {
  font-size: 18px;
  color: var(--green-dark);
}

.format-item p {
  margin: 0;
  font-size: 15px;
  color: #4a544e;
}

/* cta */
.cta {
  padding: 72px 0;
  text-align: center;
}

.cta h2 {
  font-size: 26px;
}

.cta p {
  color: #5a655f;
  margin: 0;
}

/* form */
.lead-form {
  padding: 80px 0 96px;
  background: linear-gradient(180deg, var(--paper-alt), var(--paper));
}

.form-wrap {
  max-width: 520px;
}

.lead-form h2 {
  font-size: 26px;
  margin-bottom: 28px;
}

.lead-form form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.lead-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: #5a655f;
}

.lead-form input,
.lead-form textarea {
  font-family: inherit;
  font-size: 16px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1.5px solid #d7e3dc;
  background: #fff;
  color: var(--ink);
  resize: vertical;
}

.lead-form input:focus,
.lead-form textarea:focus {
  outline: none;
  border-color: var(--green-mid);
}

.lead-form button {
  align-self: flex-start;
  border: none;
  cursor: pointer;
  margin-top: 6px;
}

/* footer */
.site-footer {
  padding: 32px 0 48px;
  text-align: center;
  color: #8a938c;
  font-size: 14px;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

/* responsive */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .format-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 30px; }
  .format-grid { grid-template-columns: 1fr; }
  .header-inner { gap: 12px; }
  .brand-text { display: none; }
}