/* ============================================
   FIT LAUNCH STUDIO - Design System
   Apple-inspired minimalism (Ive / Jobs)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Palette */
  --white:   #ffffff;
  --black:   #1d1d1f;
  --gray-50: #fbfbfd;
  --gray-100:#f5f5f7;
  --gray-200:#e8e8ed;
  --gray-400:#b0b0b6;
  --gray-500:#86868b;
  --gray-600:#6e6e73;
  --gray-700:#424245;
  --accent:  #0071e3;
  --accent-hover: #0077ed;

  /* Type - SF Pro system stack */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* Spacing */
  --space-xs:  8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl:120px;

  /* Sizing */
  --max-width: 980px;
  --max-width-narrow: 720px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

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

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-hover); }

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

/* --- Layout Utilities --- */
.container       { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-md); }
.container-narrow { max-width: var(--max-width-narrow); margin: 0 auto; padding: 0 var(--space-md); }

/* --- Navigation --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--gray-200);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.nav-brand {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--black);
  letter-spacing: -0.02em;
}

.nav-links { display: flex; gap: var(--space-md); list-style: none; }
.nav-links a {
  font-size: .875rem;
  color: var(--gray-600);
  transition: color .2s;
}
.nav-links a:hover { color: var(--black); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle svg { width: 22px; height: 22px; stroke: var(--black); }

/* --- Hero --- */
.hero {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  background: var(--gray-50);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--black);
  margin-bottom: var(--space-sm);
}

.hero .subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  color: var(--gray-600);
  font-weight: 400;
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  line-height: 1.4;
}

/* --- Sections --- */
section { padding: var(--space-xl) var(--space-md); }
section.alt { background: var(--gray-50); }

.section-title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  text-align: center;
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

/* --- Card Grid --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: transform .25s ease, box-shadow .25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.06);
}

.card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  background: var(--gray-100);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-icon svg { width: 28px; height: 28px; stroke: var(--accent); fill: none; stroke-width: 1.5; }

.card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
}

.card p { font-size: .9375rem; color: var(--gray-600); line-height: 1.55; }

/* --- CTA Button --- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 980px;
  font-size: 1rem;
  font-weight: 500;
  transition: background .2s, transform .15s;
  cursor: pointer;
  border: none;
}

.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-hover); color: var(--white); transform: scale(1.02); }

.btn-secondary { background: var(--gray-100); color: var(--black); }
.btn-secondary:hover { background: var(--gray-200); transform: scale(1.02); }

/* --- Legal / Prose Pages --- */
.prose { padding: var(--space-xl) var(--space-md) var(--space-2xl); }

.prose h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
}

.prose .last-updated {
  font-size: .875rem;
  color: var(--gray-500);
  margin-bottom: var(--space-lg);
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.prose h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.prose p,
.prose li {
  font-size: 1rem;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.prose ul, .prose ol { padding-left: 1.5em; margin-bottom: var(--space-sm); }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

.prose a { color: var(--accent); }
.prose a:hover { text-decoration: underline; }

/* --- Contact Form --- */
.contact-form { max-width: 560px; margin: 0 auto; }

.form-group { margin-bottom: var(--space-md); }

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  background: var(--gray-50);
  color: var(--black);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,113,227,.12);
}

.form-group textarea { min-height: 140px; resize: vertical; }

/* --- Footer --- */
footer {
  border-top: 1px solid var(--gray-200);
  padding: var(--space-lg) var(--space-md);
  background: var(--gray-50);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  list-style: none;
  margin-bottom: var(--space-md);
}

.footer-links a { font-size: .875rem; color: var(--gray-600); }
.footer-links a:hover { color: var(--black); }

.footer-copy {
  font-size: .8125rem;
  color: var(--gray-500);
  text-align: center;
}

/* --- Responsive --- */
@media (max-width: 734px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(20px);
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--gray-200);
  }
  .nav-toggle { display: block; }

  .hero { padding: var(--space-xl) var(--space-sm); }
  section { padding: var(--space-lg) var(--space-sm); }
  .prose { padding: var(--space-lg) var(--space-sm) var(--space-xl); }
}