/* Base Reset & Typography Setup */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.5; background: var(--bg); color: var(--text); overflow-x: hidden; }

/* Structural Utility & Spacing */
.section { padding: 96px 48px; border-bottom: 1px solid var(--border); max-width: 1400px; margin: 0 auto; }
.section__label { font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 48px; }

/* Monochrome Theme System (Light/Dark Mode) */
:root {
  --bg: #FFFFFF; --bg-alt: #F7F7F7; --text: #111111; --text-secondary: #555555; --border: #E5E7EB;
  --btn-bg: #111111; --btn-text: #FFFFFF;
  --btn-hover-bg: #333333; --btn-hover-text: #FFFFFF;
}
html.dark {
  --bg: #0a0a0a; --bg-alt: #111111; --text: #e8e8e8; --text-secondary: #999999; --border: #222222;
  --btn-bg: #e8e8e8; --btn-text: #0a0a0a;
  --btn-hover-bg: #ffffff; --btn-hover-text: #000000;
}

/* Smooth Theme Switch */
html, body, .section, .card, .btn, input, textarea, select, svg {
  transition: background-color 0.4s cubic-bezier(0.25, 1, 0.5, 1), 
              color 0.4s cubic-bezier(0.25, 1, 0.5, 1), 
              border-color 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}
/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.navbar__brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.navbar__links {
  display: flex;
  gap: 32px;
}
.navbar__link {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-secondary);
  transition: color 0.3s;
}
.navbar__link:hover {
  color: var(--text);
}
.navbar__actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.theme-toggle-btn {
  background: transparent; border: 1px solid var(--border); padding: 12px;
  cursor: pointer; color: var(--text); border-radius: 0;
  display: flex; align-items: center; justify-content: center;
}
.theme-toggle-btn:hover { background: var(--btn-bg); color: var(--btn-text); }
.theme-toggle-btn svg { width: 18px; height: 18px; }

/* Hero */
.hero { min-height: 85vh; display: flex; align-items: center; border-bottom: 1px solid var(--border); }
.hero__content { max-width: 900px; }
.hero__title { font-size: clamp(3rem, 6vw, 5.5rem); font-weight: 700; line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 32px; }
.hero__subtitle { font-size: clamp(1.125rem, 2vw, 1.5rem); color: var(--text-secondary); max-width: 650px; margin-bottom: 56px; line-height: 1.6; font-weight: 400; }

/* Buttons & Form Elements */
.btn { display: inline-block; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; padding: 14px 32px; border: 1px solid var(--btn-bg); background: var(--btn-bg); color: var(--btn-text); border-radius: 0; cursor: pointer; transition: background 0.2s, color 0.2s; text-decoration: none; }
.btn:hover { background: var(--btn-hover-bg); color: var(--btn-hover-text); }

.intake-form__input, .intake-form__textarea, .intake-form__select { 
  width: 100%; border: 1px solid var(--border); background: transparent; color: var(--text); padding: 16px 20px; border-radius: 0; font-family: inherit; font-size: 1rem;
}
.intake-form__input:focus, .intake-form__textarea:focus { outline: none; border-color: var(--text); }
.intake-form__input.invalid, .intake-form__textarea.invalid { border-color: #ff3333; }
.form-group { margin-bottom: 24px; display: flex; flex-direction: column; }
.form-error { font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: #ff3333; margin-top: 8px; min-height: 16px; opacity: 0; transition: opacity 0.3s ease; }
.form-error.visible { opacity: 1; }

/* Operational Integrity List */
.integrity-list { max-width: 900px; }
.integrity-list__item { display: flex; align-items: flex-start; gap: 24px; padding: 48px 0; border-bottom: 1px solid var(--border); }
.integrity-list__item:first-child { padding-top: 0; }
.integrity-list__item:last-child { border-bottom: none; padding-bottom: 0; }
.integrity-icon { width: 24px; height: 24px; color: var(--text-secondary); stroke-width: 1.5; flex-shrink: 0; margin-top: 4px; }
.integrity-list__text h3 { font-size: 1.5rem; font-weight: 500; margin-bottom: 12px; letter-spacing: -0.01em; }
.integrity-list__text p { color: var(--text-secondary); font-size: 1.125rem; line-height: 1.6; }

/* Service Matrix Alignment */
.service-matrix { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.service-matrix__item { background: var(--bg); padding: 48px; }
.service-matrix__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 48px; }
.service-matrix__index { font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-secondary); }
.service-matrix__icon { width: 24px; height: 24px; color: var(--text-secondary); stroke-width: 1.5; transition: color 0.4s ease; }
.service-matrix__item:hover .service-matrix__icon { color: var(--text); }
.service-title { font-size: 1.5rem; font-weight: 500; margin-bottom: 16px; letter-spacing: -0.01em; }
.service-desc { color: var(--text-secondary); font-size: 1rem; line-height: 1.6; }

/* Premium Sliding Flex-Track Carousel */
.carousel__wrapper { position: relative; overflow: hidden; }
.carousel__track { display: flex; transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1); }
.carousel__slide { width: 100%; flex-shrink: 0; box-sizing: border-box; padding: 0 4px; /* Crucial: Prevents adjacent borders from bleeding during overflow clipping */ }
.testimonial-card { background: var(--bg-alt); border: 1px solid var(--border); padding: 64px 48px; box-sizing: border-box; display: flex; flex-direction: column; justify-content: space-between; min-height: 400px; height: 100%; }
.testimonial-role { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 32px; color: var(--text); }
.testimonial-quote { font-size: 1.5rem; line-height: 1.4; color: var(--text-secondary); font-weight: 400; letter-spacing: -0.01em; }
.testimonial-metric { margin-top: 48px; font-size: 0.6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-secondary); border-top: 1px solid var(--border); padding-top: 24px; }

.carousel__controls { display: flex; gap: 1px; margin-top: 32px; background: var(--border); border: 1px solid var(--border); width: fit-content; }
.carousel-btn { background: var(--bg); border: none; color: var(--text); width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; cursor: pointer; border-radius: 0; transition: background 0.3s, color 0.3s; }
.carousel-btn:hover { background: var(--text); color: var(--bg); }
.carousel-btn svg { width: 24px; height: 24px; }

/* Contact Intake Form */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 96px; align-items: start; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; gap: 64px; } }
.contact-info h2 { font-size: clamp(2.5rem, 4vw, 4rem); font-weight: 700; line-height: 1.1; margin-bottom: 24px; letter-spacing: -0.03em; }
.contact-info p { color: var(--text-secondary); font-size: 1.125rem; line-height: 1.6; max-width: 500px; }

/* Global Footer */
.footer { padding-top: 128px; padding-bottom: 48px; border-bottom: none; }
.footer__content { display: flex; flex-direction: column; gap: 64px; margin-bottom: 128px; }
.footer__title { font-size: 1.5rem; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.02em; }
.footer__subtitle { color: var(--text-secondary); font-size: 0.875rem; letter-spacing: 0.02em; text-transform: uppercase; }
.footer__massive-link { font-size: clamp(2.5rem, 8vw, 8rem); font-weight: 700; color: var(--text); text-decoration: none; letter-spacing: -0.04em; transition: color 0.4s; display: block; word-break: break-all; line-height: 0.9; }
.footer__massive-link:hover { color: var(--text-secondary); }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border); padding-top: 32px; font-size: 0.6875rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }
@media (max-width: 768px) { .footer__bottom { flex-direction: column; align-items: flex-start; gap: 16px; } }

/* Luxurious Progressive Scroll Reveal */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1); will-change: opacity, transform; }
.reveal.active { opacity: 1; transform: translateY(0); }