/* ============================================
   Stonham Technology — Stylesheet
   Apple-inspired, clean, professional
   ============================================ */

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

:root {
  --black: #1d1d1f;
  --white: #ffffff;
  --grey-bg: #f5f5f7;
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --green: #34c759;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: #d2d2d7;
  --nav-height: 72px;
  --max-width: 1120px;
  --transition: 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-hover); }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* --- Navigation --- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  height: var(--nav-height);
}

.nav-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-size: 1.15rem; font-weight: 700; color: var(--text);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--blue); }
.nav-logo-img { height: 52px; width: auto; vertical-align: middle; margin-right: 8px; }
.about-logo-img { max-width: 100%; height: auto; }

.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }

.nav-cta {
  background: var(--blue); color: var(--white) !important;
  padding: 8px 20px; border-radius: 980px; font-size: 0.85rem; font-weight: 500;
  transition: background var(--transition);
}
.nav-cta:hover { background: var(--blue-hover); color: var(--white) !important; }

/* Mobile menu */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span {
  display: block; width: 20px; height: 2px; background: var(--text);
  margin: 5px 0; transition: var(--transition);
  border-radius: 2px;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column; gap: 0; padding: 0;
    max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { max-height: 400px; }
  .nav-links li { border-top: 1px solid rgba(0,0,0,0.05); }
  .nav-links a { display: block; padding: 16px 24px; font-size: 1rem; }
  .nav-cta { display: inline-block; margin: 16px 24px; text-align: center; }
}

/* --- Hero --- */
.hero {
  padding: 160px 24px 100px;
  text-align: center;
  background: var(--white);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 20px;
  color: var(--text);
}

.hero .subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 40px;
  line-height: 1.4;
  font-weight: 400;
}

.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 980px;
  font-size: 1rem; font-weight: 500;
  cursor: pointer; border: none;
  transition: all var(--transition);
}

.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-hover); color: var(--white); }

.btn-secondary {
  background: transparent; color: var(--blue);
  border: 1px solid var(--blue);
}
.btn-secondary:hover { background: var(--blue); color: var(--white); }

/* --- Sections --- */
section { padding: 100px 0; }
section:nth-child(even) { background: var(--grey-bg); }
section.cta-banner { background: var(--black); }

.section-label {
  font-size: 0.85rem; font-weight: 600; color: var(--blue);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; letter-spacing: -0.02em;
  line-height: 1.15; margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.15rem; color: var(--text-secondary);
  max-width: 640px; line-height: 1.5;
}

.section-header { text-align: center; margin-bottom: 64px; }
.section-header .section-subtitle { margin: 0 auto; }

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.service-card {
  background: var(--white);
  border-radius: 20px;
  padding: 40px 32px;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(0,0,0,0.04);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.service-icon {
  width: 56px; height: 56px;
  background: var(--grey-bg);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.service-card h3 {
  font-size: 1.3rem; font-weight: 600;
  margin-bottom: 12px; letter-spacing: -0.01em;
}

.service-card p {
  color: var(--text-secondary);
  line-height: 1.6; font-size: 0.95rem;
}

/* --- Stats / Trust Bar --- */
.trust-section {
  background: var(--grey-bg);
  padding: 0;
}

.trust-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  text-align: center;
  padding: 64px 0;
}

.trust-item h3 {
  font-size: 2.5rem; font-weight: 700;
  color: var(--blue); margin-bottom: 8px;
}

.trust-item p {
  font-size: 0.95rem; color: var(--text-secondary);
}

/* --- Why Section --- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-top: 48px;
}

.why-item { text-align: center; padding: 20px; }

.why-icon {
  font-size: 2.5rem; margin-bottom: 20px;
}

.why-item h3 {
  font-size: 1.2rem; font-weight: 600;
  margin-bottom: 12px;
}

.why-item p {
  color: var(--text-secondary);
  line-height: 1.6; font-size: 0.95rem;
}

/* --- About --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-content-single {
  grid-template-columns: 1fr;
}

.about-content-single .about-text {
  max-width: 820px;
}

.about-text h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.about-text p {
  color: var(--text-secondary);
  line-height: 1.7; margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-image {
  border-radius: 24px;
  overflow: hidden;
  background: transparent;
}

.about-image-content {
  line-height: 0;
}

.about-feature-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 24px;
}

.about-logo-icon {
  display: block;
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.9;
}

.about-logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .about-content { grid-template-columns: 1fr; gap: 40px; }
  .about-image { aspect-ratio: 16/9; }
}

/* --- Certifications --- */
.cert-list {
  display: flex; gap: 24px; flex-wrap: wrap;
  margin-top: 24px;
}

.cert-badge {
  display: flex; align-items: center; gap: 8px;
  background: var(--grey-bg); padding: 10px 20px;
  border-radius: 980px; font-size: 0.9rem;
  font-weight: 500; color: var(--text);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form-card {
  background: var(--grey-bg);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid rgba(0,0,0,0.04);
}

.contact-form-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.contact-form-header p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
  margin-bottom: 6px;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600;
  margin-bottom: 8px; color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--white);
  transition: border-color var(--transition);
  color: var(--text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.12);
}

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

.contact-info { padding-top: 56px; }

.contact-info h3 {
  font-size: 1.5rem; font-weight: 600;
  margin-bottom: 24px;
}

.contact-detail {
  display: flex; align-items: flex-start; gap: 16px;
  margin-bottom: 28px;
}

.contact-detail-icon {
  width: 44px; height: 44px;
  background: var(--grey-bg); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}

.contact-detail h4 {
  font-size: 0.95rem; font-weight: 600;
  margin-bottom: 4px;
}

.contact-detail p {
  color: var(--text-secondary);
  font-size: 0.95rem; line-height: 1.5;
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-form-card { padding: 24px; }
}

/* --- CTA Banner --- */
.cta-banner {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 100px 24px;
}

.cta-banner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-banner p {
  color: rgba(255,255,255,0.7);
  font-size: 1.15rem;
  max-width: 560px; margin: 0 auto 40px;
}

.cta-banner .btn-primary {
  background: var(--white); color: var(--black);
}
.cta-banner .btn-primary:hover {
  background: var(--grey-bg);
}

/* --- Footer --- */
.footer {
  background: var(--black);
  color: rgba(255,255,255,0.5);
  padding: 40px 0;
  font-size: 0.85rem;
}

.footer-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}

.footer-inner p { display: flex; align-items: center; gap: 8px; margin: 0; }
.footer-logo-icon { flex-shrink: 0; }
.footer-links { display: flex; gap: 24px; list-style: none; }
.footer-links a { color: rgba(255,255,255,0.5); }
.footer-links a:hover { color: rgba(255,255,255,0.8); }

/* --- Animations --- */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* --- Services Page Detail --- */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.service-detail:last-child { border-bottom: none; }

.service-detail:nth-child(even) { direction: rtl; }
.service-detail:nth-child(even) > * { direction: ltr; }

.service-detail-visual {
  background: var(--grey-bg);
  border-radius: 24px;
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
}

.service-detail-content h3 {
  font-size: 1.8rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 16px;
}

.service-detail-content p {
  color: var(--text-secondary);
  line-height: 1.7; margin-bottom: 16px;
}

.service-detail-content ul {
  list-style: none; padding: 0;
}

.service-detail-content li {
  padding: 8px 0; color: var(--text-secondary);
  font-size: 0.95rem;
}

.service-detail-content li::before {
  content: "✓"; color: var(--green);
  font-weight: 700; margin-right: 12px;
}

@media (max-width: 768px) {
  .service-detail { grid-template-columns: 1fr; gap: 32px; }
  .service-detail:nth-child(even) { direction: ltr; }
}

/* --- Page Header --- */
.page-header {
  padding: 160px 24px 60px;
  text-align: center;
  background: var(--grey-bg);
}



.page-header h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700; letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px; margin: 0 auto;
}

/* --- Form messages --- */
.form-success,
.form-error {
  padding: 16px 24px;
  border-radius: 12px;
  font-weight: 500;
  display: none;
}

.form-success {
  background: #e8f5e9;
  color: #2e7d32;
}

.form-error {
  background: #fdecec;
  color: #b3261e;
}

.form-success.show,
.form-error.show { display: block; }

/* --- Accessibility --- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* --- Skip to content --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--blue);
  color: var(--white);
  padding: 8px 16px;
  border-radius: 8px;
  z-index: 10000;
  font-size: 0.9rem;
  font-weight: 500;
}
.skip-link:focus { top: 8px; }

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}