* {
  box-sizing: border-box;
}

:root {
  --color-bg: #f5f5f7; /* Page background */
  --color-surface: #ffffff; /* Main panel surface */
  --color-surface-alt: #f7f7f8; /* Card surface */
  --color-text: #111111; /* Primary text */
  --color-muted: #6e6e73; /* Secondary text */
  --color-border: rgba(0, 0, 0, 0.08); /* Subtle border */
  --color-hero-bg: #1f2937; /* Hero background */
  --color-hero-text: #ffffff; /* Hero text */
  --color-hero-muted: rgba(255, 255, 255, 0.8); /* Hero muted text */
  --color-hero-visual: #e5e7eb; /* Hero visual block */
}

/* Base */
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  scroll-behavior: smooth;
}

section[id] {
  scroll-margin-top: 24px;
}

/* Utilities */
.border-panel {
  border: 1px solid var(--color-border);
  border-radius: 24px;
}

/* Layout */
.page-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
}

main {
  display: flex;
  justify-content: center;
  flex: 1;
  margin-top: 20px;
}

/* Components */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: var(--color-surface);
}

.brand {
  color: var(--color-text);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 18px;
}

.nav-links a {
  color: var(--color-muted);
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--color-text);
}

.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: min(100%, 980px);
  padding: 20px;
  background: var(--color-surface);
  margin: 0 auto;
}

.intro {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 20px;
  padding: 28px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--color-hero-bg), #334155);
  color: var(--color-hero-text);
}

.intro h1 {
  margin: 0 0 10px;
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  line-height: 1.1;
}

.intro p {
  margin: 0;
  max-width: 620px;
  color: var(--color-hero-muted);
  line-height: 1.7;
}

.section-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 0;
}

.section-block h2 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--color-text);
}

.section-block p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.6;
}

.showcase,
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  padding: 18px;
  border-radius: 18px;
  background: var(--color-surface-alt);
}

.card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding: 14px 18px;
  background: var(--color-surface);
  color: var(--color-muted);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.social-links a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.social-links a:hover {
  color: var(--color-text);
}

.contact-button,
.contact-submit,
.modal-close {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
}

.contact-button {
  align-self: flex-start;
  padding: 9px 14px;
  background: var(--color-hero-bg);
  color: var(--color-hero-text);
}

.contact-button:hover {
  opacity: 0.95;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(17, 17, 17, 0.65);
  z-index: 1000;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal-card {
  width: min(100%, 520px);
  padding: 20px;
  background: var(--color-surface);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-close {
  width: 36px;
  height: 36px;
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--color-text);
  font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  font: inherit;
  background: var(--color-surface);
}

.contact-form textarea {
  resize: vertical;
}

.contact-submit {
  align-self: flex-start;
  padding: 10px 16px;
  background: var(--color-text);
  color: var(--color-surface);
}

/* Responsive */
@media (max-width: 980px) {
  .intro {
    grid-template-columns: 1fr;
  }

  .showcase,
  .team-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 12px;
  }

  .topbar {
    flex-direction: column;
    gap: 10px;
    border-radius: 24px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}