/* ============================================================
   RESET & BASE
   Browsers add their own default styles. This removes them
   so we start from a clean, consistent slate.
   ============================================================ */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a1a1a;
  background-color: #ffffff;
}

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


/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid #e8e8e8;
}

.logo {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1a1a1a;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 14px;
  color: #666;
}

.nav-link:hover {
  color: #1a1a1a;
}


/* ============================================================
   BUTTONS
   ============================================================ */

.btn-primary {
  display: inline-block;
  background-color: #1a1a1a;
  color: #ffffff;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: #333;
}


/* ============================================================
   HERO
   ============================================================ */

.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  max-width: 680px;
  margin: 0 auto;
}

.hero-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #999;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #1a1a1a;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 18px;
  color: #555;
  line-height: 1.7;
  margin-bottom: 2rem;
}


/* ============================================================
   DEMO BOX
   ============================================================ */

.demo-section {
  background-color: #f7f7f5;
  padding: 3rem 2rem;
  display: flex;
  justify-content: center;
}

.demo-box {
  background: #ffffff;
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 2rem;
  max-width: 480px;
  width: 100%;
}

.demo-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #999;
  margin-bottom: 0.5rem;
}

.demo-quote {
  font-size: 18px;
  color: #1a1a1a;
  font-style: italic;
  margin-bottom: 1.5rem;
}

.demo-question {
  font-size: 15px;
  color: #444;
  margin-bottom: 1rem;
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: #f0f0ee;
  border: 1px solid #e0e0de;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 13px;
  color: #333;
  cursor: pointer;
}

.tag:hover {
  background: #e8e8e6;
}


/* ============================================================
   HOW IT WORKS
   ============================================================ */

.how-section {
  padding: 4rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #999;
  margin-bottom: 2rem;
  text-align: center;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.step-card {
  background: #ffffff;
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 1.5rem;
}

.step-num {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: #bbb;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.step-title {
  font-size: 15px;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 13px;
  color: #777;
  line-height: 1.6;
}


/* ============================================================
   REVISION BRIEF
   ============================================================ */

.brief-section {
  background: #f7f7f5;
  padding: 4rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.brief-card {
  background: #ffffff;
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 2rem;
  max-width: 520px;
  width: 100%;
}

.brief-title {
  font-size: 13px;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.brief-list {
  list-style: none;
  padding: 0;
}

.brief-list li {
  font-size: 15px;
  color: #1a1a1a;
  padding: 0.75rem 0;
  padding-left: 1.25rem;
  border-bottom: 1px solid #f0f0ee;
  position: relative;
}

.brief-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: #bbb;
}

.brief-list li:last-child {
  border-bottom: none;
}


/* ============================================================
   CTA
   ============================================================ */

.cta-section {
  text-align: center;
  padding: 5rem 2rem;
  max-width: 560px;
  margin: 0 auto;
}

.cta-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #1a1a1a;
  margin-bottom: 1rem;
}

.cta-subtitle {
  font-size: 16px;
  color: #666;
  margin-bottom: 2rem;
}


/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  border-top: 1px solid #e8e8e8;
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 13px;
  color: #aaa;
}