/* =============================================
   MacroKinetic — style.css
   Industrial AI · Mobile-First Redesign
   ============================================= */

/* ---- Custom Properties ---- */
:root {
  --bg-base:       #FFFFFF;
  --bg-raised:     #F7F8FA;
  --bg-card:       #FFFFFF;
  --bg-card-hover: #F2F4F8;
  --border:        #E5E7EB;
  --border-mid:    #D1D5DB;

  --accent:        #3063EE;
  --accent-light:  #5B8DF5;
  --accent-dim:    #1A4DC0;

  --text-primary:  #0F1117;
  --text-secondary:#4B5563;
  --text-muted:    #9CA3AF;
  --text-label:    #3063EE;

  --font: 'Inter', system-ui, sans-serif;

  --section-py: 48px;
  --max-w:      1280px;
  --r:          4px;
  --r-lg:       8px;
  --ease:       0.2s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-primary);
}
h1 { font-size: clamp(2rem, 7vw, 3.4rem); }
h2 { font-size: clamp(1.4rem, 4vw, 2rem); }
h3 { font-size: 1rem; font-weight: 600; }
p  { color: var(--text-secondary); line-height: 1.65; }

/* ---- Layout ---- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
section { padding: var(--section-py) 0; }

/* ---- Section Labels ---- */
.section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-label);
  margin-bottom: 10px;
}

/* Section headers — left-aligned */
.section-header-left { margin-bottom: 40px; }
.section-header-left h2 { margin-bottom: 8px; max-width: 560px; }
.section-intro { font-size: 0.9375rem; color: var(--text-secondary); max-width: 520px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 11px 22px;
  border-radius: var(--r);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  transition: all var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(48,99,238,0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-mid);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-full { width: 100%; justify-content: center; }

/* ---- Fade-in animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ==============================================
   NAVIGATION
   ============================================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease), padding var(--ease), box-shadow var(--ease);
}
#navbar.scrolled {
  border-bottom-color: var(--border);
  padding: 12px 0;
  box-shadow: 0 1px 8px rgba(0,0,0,0.05);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.nav-logo { display: flex; align-items: center; }
.nav-logo-img { height: 28px; width: auto; display: block; }

.nav-links {
  display: none;
}
.nav-link {
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--r);
  transition: color var(--ease), background var(--ease);
  display: block;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-raised); }
.nav-link.active { color: var(--accent); }

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: var(--r) !important;
}
.nav-cta:hover {
  background: var(--accent-dim) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(48,99,238,0.25);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-links.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 1px);
  left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 8px 16px 16px;
  gap: 2px;
  z-index: 999;
}
.nav-links.open .nav-cta { margin-top: 8px; text-align: center; }

/* ==============================================
   HERO
   ============================================== */
#hero {
  padding: 120px 0 56px;
  background: var(--bg-base);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  background: var(--bg-raised);
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.hero-title-accent { color: var(--accent); }

.hero-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 14px;
  line-height: 1.6;
}
.hero-description--sub {
  font-size: 0.9375rem;
  margin-bottom: 28px;
  color: var(--text-muted);
}

.hero-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-stat__value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.hero-stat__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-visual { display: none; }

.hero-visual-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  aspect-ratio: 4 / 3;
  line-height: 0;
  background: var(--bg-raised); /* placeholder until hero-main.jpg is generated */
}
.hero-visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==============================================
   PROBLEMS STRIP
   ============================================== */
#problems {
  background: var(--bg-raised);
  padding: var(--section-py) 0;
}

.problems-header { margin-bottom: 28px; }
.problems-header h2 { max-width: 420px; }

.problems-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.problem-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 0 18px 20px;
  border-left: 3px solid var(--border);
  transition: border-color var(--ease);
}
.problem-item:not(:last-child) { margin-bottom: 4px; }
.problem-item:hover { border-left-color: var(--accent); }

.problem-item__label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}
.problem-item__outcome {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.problem-item__outcome::before {
  content: '\2192\00a0\00a0';
  color: var(--accent);
  font-weight: 600;
}

/* ==============================================
   CAPABILITIES
   ============================================== */
#solutions {
  background: var(--bg-base);
  padding: var(--section-py) 0;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.capability-card {
  background: var(--bg-card);
  padding: 28px 24px;
  transition: background var(--ease);
}
.capability-card:hover { background: var(--bg-card-hover); }
.capability-card h3 { margin-bottom: 8px; font-size: 0.9375rem; }
.capability-card p { font-size: 0.875rem; line-height: 1.6; }

/* ==============================================
   DEPLOYMENTS
   ============================================== */
#use-cases {
  background: var(--bg-raised);
  padding: var(--section-py) 0;
}

/* Alternating deployment rows */
.deployment-list {
  display: flex;
  flex-direction: column;
  gap: 72px;
  margin-top: 48px;
}

.deployment-row {
  display: grid;
  grid-template-columns: 1fr;   /* mobile-first: single column */
  gap: 28px;
}

.deployment-row__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #0F1117;
}
.deployment-row__media img,
.deployment-row__media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.deployment-row__badge {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: rgba(15,17,23,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: var(--r);
}

.deployment-row__body { display: flex; flex-direction: column; justify-content: center; }
.deployment-row__body h3 { margin-bottom: 10px; font-size: 1.0625rem; line-height: 1.3; }
.deployment-row__body > p { font-size: 0.9rem; margin-bottom: 18px; }

.uc-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-label);
  margin-bottom: 10px;
}

.deployment-outcomes {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.deployment-outcomes li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
}
.deployment-outcomes li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.75rem;
}

/* ==============================================
   WHY MACROKINETIC
   ============================================== */
#why {
  background: var(--bg-base);
  padding: var(--section-py) 0;
}

.why-list {
  display: flex;
  flex-direction: column;
  margin-top: 36px;
}

.why-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px 0;
  border-top: 1px solid var(--border);
}
.why-item:last-child { border-bottom: 1px solid var(--border); }

.why-item__num {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  min-width: 24px;
  padding-top: 3px;
}
.why-item__content h3 { margin-bottom: 6px; font-size: 0.9375rem; }
.why-item__content p { font-size: 0.875rem; }

.why-callout {
  margin-top: 32px;
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  background: var(--bg-raised);
  border-radius: 0 var(--r) var(--r) 0;
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.55;
  max-width: 640px;
}

/* ==============================================
   CONTACT + FAQ
   ============================================== */
#contact {
  background: var(--bg-raised);
  padding: var(--section-py) 0;
}

.contact-split {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.contact-faq h2 { margin-bottom: 28px; }

.faq-accordion { display: flex; flex-direction: column; }

.faq-accordion__item { border-bottom: 1px solid var(--border); }
.faq-accordion__item:first-child { border-top: 1px solid var(--border); }

.faq-accordion__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0;
  background: none;
  border: none;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--ease);
}
.faq-accordion__q:hover { color: var(--accent); }

.faq-accordion__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--border-mid);
  position: relative;
  transition: border-color var(--ease);
}
.faq-accordion__icon::before,
.faq-accordion__icon::after {
  content: '';
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease);
}
.faq-accordion__icon::before {
  width: 8px; height: 1.5px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.faq-accordion__icon::after {
  width: 1.5px; height: 8px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.faq-accordion__item.open .faq-accordion__q { color: var(--accent); }
.faq-accordion__item.open .faq-accordion__icon { border-color: var(--accent); }
.faq-accordion__item.open .faq-accordion__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-accordion__a { padding: 0 0 18px; }
.faq-accordion__a p { font-size: 0.875rem; line-height: 1.7; }

.contact-form-wrap { display: flex; flex-direction: column; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}
.form-group input,
.form-group textarea {
  padding: 10px 14px;
  border: 1px solid var(--border-mid);
  border-radius: var(--r);
  font-size: 0.875rem;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg-base);
  transition: border-color var(--ease), box-shadow var(--ease);
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(48,99,238,0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-status { font-size: 0.875rem; min-height: 20px; margin-top: 4px; }
.form-status.success { color: #059669; }
.form-status.error   { color: #DC2626; }

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}
.contact-item svg { width: 15px; height: 15px; flex-shrink: 0; color: var(--text-muted); }
a.contact-item:hover { color: var(--accent); }

/* ==============================================
   FOOTER
   ============================================== */
footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  padding: 40px 0 24px;
}

.footer-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-brand p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 10px;
  line-height: 1.5;
}
.footer-logo-img { height: 24px; width: auto; }

.footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.footer-col a {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 3px 0;
  transition: color var(--ease);
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-bottom p { font-size: 0.75rem; color: var(--text-muted); }
.footer-bottom a:hover { color: var(--accent); }

/* ==============================================
   RESPONSIVE — 480px
   ============================================== */
@media (min-width: 480px) {
  .hero-stats {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 32px;
  }
}

/* ==============================================
   RESPONSIVE — 768px (tablets +)
   ============================================== */
@media (min-width: 768px) {
  :root { --section-py: 72px; }

  /* Nav */
  .nav-toggle { display: none; }
  .nav-links { display: flex; align-items: center; gap: 2px; }

  /* Hero */
  #hero { padding: 140px 0 72px; }
  .hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }
  .hero-visual { display: block; }

  /* Problems — 2-col */
  .problems-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }

  /* Capabilities — 2×2 */
  .capabilities-grid { grid-template-columns: 1fr 1fr; }

  /* Deployments — alternating 2-col rows at tablet+ */
  .deployment-row {
    grid-template-columns: 55fr 45fr;
    gap: 48px;
    align-items: center;
  }
  /* Reverse: media moves to right column */
  .deployment-row--reverse {
    grid-template-columns: 45fr 55fr;
  }
  .deployment-row--reverse .deployment-row__media {
    grid-column: 2;
    grid-row: 1;
  }
  .deployment-row--reverse .deployment-row__body {
    grid-column: 1;
    grid-row: 1;
  }

  /* Contact split */
  .contact-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
  }

  /* Footer */
  .footer-grid {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ==============================================
   RESPONSIVE — 1024px (desktop +)
   ============================================== */
@media (min-width: 1024px) {
  :root { --section-py: 96px; }

  #hero { padding: 152px 0 96px; }
  .hero-inner { gap: 72px; }

  /* Problems — 4-col horizontal strip */
  .problems-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .problem-item {
    border-left: none;
    border-top: 3px solid var(--border);
    padding: 20px 20px 20px 0;
  }
  .problem-item:not(:last-child) { margin-bottom: 0; }
  .problem-item:hover {
    border-top-color: var(--accent);
    border-left: none;
  }

  /* Deployments — wider gap at desktop */
  .deployment-list { gap: 96px; }
  .deployment-row { gap: 64px; }
}

/* ==============================================
   SUB-PAGES (FAQ, legal, future content pages)
   ============================================== */
.subpage-main {
  padding-top: 84px;   /* clear fixed navbar */
  padding-bottom: 64px;
  min-height: 70vh;
}
.subpage-head { padding: 32px 0 8px; }
.subpage-head h1 {
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  margin-bottom: 14px;
  max-width: 760px;
}
.subpage-lead {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 680px;
}
.doc-meta { font-size: 0.85rem; color: var(--text-muted); margin-top: 6px; }

/* FAQ list */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 760px;
  padding: 28px 0 8px;
}
.faq-block h2 { font-size: 1.0625rem; margin-bottom: 8px; }
.faq-block p  { font-size: 0.9375rem; color: var(--text-secondary); }
.faq-block a  { color: var(--accent); }

/* Legal / document content */
.doc-content { max-width: 760px; padding: 12px 0 8px; }
.doc-content h2 { font-size: 1.0625rem; margin: 28px 0 8px; }
.doc-content p  { font-size: 0.9375rem; margin-bottom: 12px; }
.doc-content ul { margin: 0 0 14px 20px; list-style: disc; }
.doc-content li { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: 6px; }
.doc-content a  { color: var(--accent); }
.doc-content strong { color: var(--text-primary); }

/* Shared CTA strip for sub-pages */
.subpage-cta {
  max-width: 760px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.subpage-cta p { font-size: 0.9375rem; color: var(--text-secondary); }
.subpage-cta a { color: var(--accent); font-weight: 500; }

.faq-more { margin-top: 18px; }
.faq-more a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
}
.faq-more a:hover { color: var(--accent-dim); }