/* ── AI Controller Toolkit — Global Styles ─────────────────────────── */
/* Brand: Option 3 "Clean & Confident" — Forest Green + Warm Amber + Cream */

:root {
  --forest: #2C4A3E;
  --forest-light: #365A4C;
  --amber: #E8913A;
  --amber-dark: #CC7D2F;
  --teal: #6BA3A0;
  --white: #ffffff;
  --cream: #FFFDF7;
  --sand: #E8E2D8;
  --gray-400: #9A9489;
  --gray-600: #6B6560;
  --gray-800: #2D3436;
  --red: #C0392B;
  --warn: #D4852A;
  --green: #6B8F71;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --radius: 8px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.65;
}

/* ── Typography ─────────────────────────────────────────────────────── */

h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; color: var(--forest); }
h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 1.75rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
p { margin-bottom: 1rem; }
a { color: var(--forest); text-decoration: none; font-weight: 500; }
a:hover { color: var(--amber); text-decoration: underline; }

/* ── Layout ─────────────────────────────────────────────────────────── */

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 4rem 0; }
.section--alt { background: var(--cream); }
.section--dark { background: var(--forest); color: var(--white); }
.section--dark h2, .section--dark h3 { color: var(--white); }
.section--dark p { color: #B5CBBF; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 2.5rem 0; }
}

/* ── Nav ────────────────────────────────────────────────────────────── */

.nav {
  background: var(--forest);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.nav__logo {
  color: var(--white);
  font-size: 1.15rem;
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
}

.nav__logo-ai {
  font-family: 'Archivo Black', sans-serif;
  color: var(--amber);
  position: relative;
}

.nav__logo-ai::after {
  content: "\2726";
  position: absolute;
  top: -0.2em;
  right: -0.3em;
  font-size: 0.4em;
  color: var(--amber);
}

.nav__logo-controller {
  font-family: 'DM Serif Display', serif;
  color: var(--white);
}

.nav__links { display: flex; gap: 1.5rem; list-style: none; align-items: center; }
.nav__links a { color: #C5D5CF; font-size: 0.9rem; text-decoration: none; }
.nav__links a:hover { color: var(--white); text-decoration: none; }

@media (max-width: 768px) {
  .nav__links { display: none; }
}

/* ── Hero ───────────────────────────────────────────────────────────── */

.hero {
  background: var(--forest);
  color: var(--white);
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero h1 { color: var(--white); font-size: 2.75rem; margin-bottom: 1.25rem; }
.hero p { color: #B5CBBF; font-size: 1.15rem; max-width: 640px; margin: 0 auto 2rem; }

@media (max-width: 768px) {
  .hero { padding: 3rem 0 2.5rem; }
  .hero h1 { font-size: 1.85rem; }
}

/* ── Buttons ────────────────────────────────────────────────────────── */

.btn {
  display: inline-block;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.2s, transform 0.1s;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary { background: var(--amber); color: var(--white); }
.btn--primary:hover { background: var(--amber-dark); color: var(--white); }
.btn--outline { background: transparent; color: var(--amber); border: 2px solid var(--amber); }
.btn--outline:hover { background: var(--amber); color: var(--white); }
.btn--white { background: var(--white); color: var(--forest); }
.btn--white:hover { background: var(--cream); color: var(--forest); }
.btn--lg { padding: 1rem 2.25rem; font-size: 1.05rem; }

.btn-group { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Cards ──────────────────────────────────────────────────────────── */

.card {
  background: var(--white);
  border: 1px solid var(--sand);
  border-radius: var(--radius);
  padding: 2rem;
  transition: box-shadow 0.2s;
}

.card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }

.card__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.card__price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--forest);
  margin-bottom: 0.25rem;
}

.card__price span { font-size: 0.9rem; font-weight: 400; color: var(--gray-600); }

/* ── Tier badge colors ──────────────────────────────────────────────── */

.tier-1 { border-top: 4px solid var(--amber); }
.tier-2 { border-top: 4px solid var(--teal); }
.tier-3 { border-top: 4px solid #9b7ec4; }
.tier-4 { border-top: 4px solid var(--forest); }

/* ── Feature list ───────────────────────────────────────────────────── */

.features { list-style: none; margin: 1rem 0; }
.features li { padding: 0.35rem 0; padding-left: 1.5rem; position: relative; font-size: 0.95rem; }
.features li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

/* ── Severity badges ────────────────────────────────────────────────── */

.badge { display: inline-block; padding: 0.15rem 0.6rem; border-radius: 4px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; }
.badge--critical { background: #FFEBEE; color: var(--red); }
.badge--warning { background: #FFF3E0; color: var(--warn); }
.badge--observation { background: #E8F5E9; color: var(--green); }

/* ── Testimonial / quote ────────────────────────────────────────────── */

.quote {
  border-left: 4px solid var(--amber);
  padding: 1.25rem 1.5rem;
  background: var(--cream);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--gray-600);
}

/* ── Stats row ──────────────────────────────────────────────────────── */

.stats { display: flex; gap: 3rem; justify-content: center; flex-wrap: wrap; padding: 2rem 0; }
.stat { text-align: center; }
.stat__number { font-size: 2.25rem; font-weight: 700; color: var(--amber); display: block; }
.stat__label { font-size: 0.85rem; color: var(--gray-600); }

/* ── FAQ accordion ──────────────────────────────────────────────────── */

.faq { max-width: 720px; margin: 0 auto; }
.faq__item { border-bottom: 1px solid var(--sand); }
.faq__q {
  display: block;
  width: 100%;
  text-align: left;
  padding: 1.25rem 0;
  background: none;
  border: none;
  font: inherit;
  font-weight: 600;
  color: var(--forest);
  cursor: pointer;
  font-size: 1rem;
}
.faq__q::after { content: "+"; float: right; font-size: 1.25rem; color: var(--gray-400); }
.faq__q.active::after { content: "\2212"; }
.faq__a { display: none; padding: 0 0 1.25rem; color: var(--gray-600); font-size: 0.95rem; }
.faq__a.show { display: block; }

/* ── Footer ─────────────────────────────────────────────────────────── */

.footer {
  background: var(--forest);
  color: #8AAEA0;
  padding: 2.5rem 0;
  font-size: 0.85rem;
  text-align: center;
}

.footer a { color: #C5D5CF; }
.footer p { margin-bottom: 0.5rem; }

/* ── Utility ────────────────────────────────────────────────────────── */

.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-prose { max-width: 640px; }