/* ============ Design tokens ============ */
:root {
  --color-bg: #f7f7f5;
  --color-surface: #ffffff;
  --color-text: #23262b;
  --color-text-muted: #5b616b;
  --color-border: #e2e2df;

  --color-granite-900: #1c1f24;
  --color-granite-800: #2b2f36;
  --color-granite-700: #3d434c;

  --color-accent: #2f6f5e;
  --color-accent-dark: #234f43;
  --color-accent-light: #e7f0ed;

  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(20, 22, 25, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 22, 25, 0.08);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1em;
  color: var(--color-text-muted);
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-granite-800);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-granite-800);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 247, 245, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--color-granite-800);
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
}

.logo-text {
  font-size: 1.05rem;
  color: var(--color-granite-900);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.primary-nav a {
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
}

.primary-nav a:hover {
  color: var(--color-granite-900);
}

.primary-nav .nav-cta {
  padding: 9px 20px;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: #fff;
}

.primary-nav .nav-cta:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-granite-900);
  border-radius: 2px;
}

/* ============ Hero ============ */
.hero {
  padding: 96px 0 88px;
  background:
    radial-gradient(circle at 85% 0%, var(--color-accent-light) 0%, transparent 55%),
    var(--color-bg);
}

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

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent-dark);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  color: var(--color-granite-900);
}

.hero-sub {
  font-size: 1.1rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

/* ============ Sections ============ */
.section {
  padding: 88px 0;
}

.section h2 {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  color: var(--color-granite-900);
}

.section-sub {
  max-width: 560px;
  margin-bottom: 48px;
}

/* ============ Services ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 1.1rem;
  color: var(--color-granite-900);
}

.card p {
  margin: 0;
  font-size: 0.95rem;
}

/* ============ About ============ */
.about {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text h2 {
  color: var(--color-granite-900);
}

.about-stats {
  display: grid;
  gap: 20px;
}

.stat {
  padding: 20px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-light);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.stat-num {
  display: block;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-granite-900);
}

.stat-label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ============ Contact ============ */
.contact-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}

.contact-intro h2 {
  color: var(--color-granite-900);
}

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 18px;
}

.form-row {
  display: grid;
  gap: 6px;
}

.form-row label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-granite-800);
}

.optional {
  font-weight: 400;
  color: var(--color-text-muted);
}

.form-row input,
.form-row textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.contact-form .btn {
  justify-self: start;
}

.form-status {
  margin: 0;
  font-size: 0.9rem;
  min-height: 1.2em;
}

.form-status.success {
  color: var(--color-accent-dark);
}

.form-status.error {
  color: #b3392c;
}

/* ============ Footer ============ */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ============ Responsive ============ */
@media (max-width: 860px) {
  .about-inner,
  .contact-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px 20px;
    display: none;
  }

  .primary-nav.open {
    display: flex;
  }

  .primary-nav a {
    width: 100%;
    padding: 10px 0;
  }

  .primary-nav .nav-cta {
    margin-top: 8px;
    text-align: center;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .section {
    padding: 64px 0;
  }
}