/* ===================================================
   DevLab Innovations — Global Styles
   Brand colors match Summa Ledger (WCAG 2.1 AA)
   =================================================== */

:root {
  --primary:        #7C3AED;
  --primary-light:  #A78BFA;
  --primary-dark:   #5B21B6;
  --primary-bg:     #F5F3FF;
  --secondary:      #F97316;
  --secondary-dark: #C2410C;
  --secondary-bg:   #FFF7ED;
  --teal:           #0E7490;
  --teal-light:     #ECFEFF;
  --text:           #1C1917;
  --text-secondary: #57534E;
  --text-tertiary:  #78716C;
  --background:     #FAFAF9;
  --surface:        #FFFFFF;
  --border:         #E7E5E4;
  --border-dark:    #D6D3D1;
  --success:        #047857;
  --radius-sm:      6px;
  --radius-md:      12px;
  --radius-lg:      20px;
  --shadow-sm:      0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:      0 4px 16px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:      0 10px 40px rgba(124,58,237,.12), 0 4px 12px rgba(0,0,0,.08);
  --max-width:      1140px;
  --nav-height:     64px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Layout helpers ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section    { padding: 80px 0; }
.section--alt { background: var(--surface); }
.section--primary { background: var(--primary); color: #fff; }

/* ── Typography ── */
.eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 56px;
}

.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: .9375rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform .15s, box-shadow .15s, opacity .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,.35);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(124,58,237,.45); }

.btn-secondary {
  background: var(--surface);
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover { background: var(--primary-bg); }

.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.5);
}
.btn-outline-white:hover { background: rgba(255,255,255,.1); }

.btn-lg { padding: 15px 30px; font-size: 1rem; }

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250,250,249,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.nav__brand-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: .9rem;
  font-weight: 700;
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}

.nav__link {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.nav__link:hover, .nav__link.active {
  color: var(--primary);
  background: var(--primary-bg);
}

.nav__cta { flex-shrink: 0; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: .25s;
}

.nav__mobile {
  display: none;
  flex-direction: column;
  position: absolute;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  gap: 4px;
  box-shadow: var(--shadow-md);
}
.nav__mobile.open { display: flex; }
.nav__mobile .nav__link { font-size: 1rem; padding: 10px 12px; }
.nav__mobile .btn { margin-top: 8px; width: 100%; justify-content: center; }

/* ── Hero ── */
.hero {
  padding: 80px 0 48px;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, var(--primary-bg) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  position: relative;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid rgba(124,58,237,.2);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .8125rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero__badge::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .6; transform: scale(.9); }
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 24px;
}

.hero__title em {
  font-style: normal;
  color: var(--primary);
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__trust {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: .875rem;
  color: var(--text-tertiary);
}

.hero__trust-divider { color: var(--border-dark); }

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ── iPhone frame ── */
.iphone-frame {
  position: relative;
  width: 270px;
  flex-shrink: 0;
  background: #18181b;
  border-radius: 52px;
  padding: 13px;
  box-shadow:
    inset 0 0 0 2px #3f3f46,
    0 0 0 1px rgba(0,0,0,.6),
    0 32px 64px rgba(0,0,0,.4),
    0 8px 24px rgba(124,58,237,.2);
}

/* Dynamic Island */
.iphone-notch {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 88px;
  height: 26px;
  background: #000;
  border-radius: 20px;
  z-index: 10;
}

/* Power button — right */
.iphone-btn--power {
  position: absolute;
  right: -3px;
  top: 130px;
  width: 3px;
  height: 68px;
  background: #27272a;
  border-radius: 0 3px 3px 0;
}

/* Volume buttons — left */
.iphone-btn--vol-up {
  position: absolute;
  left: -3px;
  top: 108px;
  width: 3px;
  height: 46px;
  background: #27272a;
  border-radius: 3px 0 0 3px;
}

.iphone-btn--vol-down {
  position: absolute;
  left: -3px;
  top: 164px;
  width: 3px;
  height: 46px;
  background: #27272a;
  border-radius: 3px 0 0 3px;
}

.iphone-screen {
  border-radius: 40px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 9 / 19.5;
}

.iphone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
}

/* ── Features grid ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow .2s, transform .2s, border-color .2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: rgba(124,58,237,.25);
}

.feature-card__icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.feature-card__icon--purple { background: var(--primary-bg); }
.feature-card__icon--orange { background: var(--secondary-bg); }
.feature-card__icon--teal   { background: var(--teal-light); }

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card__desc {
  font-size: .9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── Full feature list (features.html) ── */
.features-full {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.feature-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: box-shadow .2s;
}
.feature-item:hover { box-shadow: var(--shadow-sm); }

.feature-item__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.feature-item__body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.feature-item__body p  { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; }

/* ── CTA Banner ── */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #9B59E8 100%);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,.05);
}

.cta-banner__title { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; margin-bottom: 12px; }
.cta-banner__sub   { font-size: 1.0625rem; opacity: .85; margin-bottom: 32px; }
.cta-banner__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ── Differentiator grid ── */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.diff-card {
  border-radius: var(--radius-lg);
  padding: 36px;
  border-top: 4px solid transparent;
  transition: transform .2s, box-shadow .2s;
}

.diff-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.diff-card--primary { background: var(--primary-bg);  border-color: var(--primary); }
.diff-card--orange  { background: var(--secondary-bg); border-color: var(--secondary); }
.diff-card--teal    { background: var(--teal-light);   border-color: var(--teal); }
.diff-card--dark    { background: var(--surface); border-color: var(--text); border: 1px solid var(--border); border-top: 4px solid var(--text); }

.diff-card__icon {
  font-size: 1.75rem;
  margin-bottom: 16px;
  display: block;
}

.diff-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.diff-card p {
  font-size: .9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.diff-card p em {
  font-style: italic;
  color: var(--text);
  font-weight: 500;
}

.ai-footnote {
  margin-top: 40px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--primary-bg);
  border: 1px solid rgba(124,58,237,.15);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: .875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ai-footnote span { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }

/* ── Stats row ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 64px;
}

.stat {
  background: var(--surface);
  padding: 36px 24px;
  text-align: center;
}

.stat__value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -.03em;
}

.stat__label {
  font-size: .9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Page hero ── */
.page-hero {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--primary-bg) 0%, transparent 100%);
  text-align: center;
}

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

.about-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about-card__icon {
  width: 40px; height: 40px;
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.about-card__body h4 { font-size: .9375rem; font-weight: 700; margin-bottom: 4px; }
.about-card__body p  { font-size: .875rem; color: var(--text-secondary); line-height: 1.55; }

.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.value-card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.value-card__icon { font-size: 1.5rem; margin-bottom: 12px; }
.value-card h4    { font-size: .9375rem; font-weight: 700; margin-bottom: 6px; }
.value-card p     { font-size: .875rem; color: var(--text-secondary); line-height: 1.55; }


/* ── Footer ── */
.footer {
  background: var(--text);
  color: rgba(255,255,255,.7);
  padding: 48px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer__brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer__brand-icon {
  width: 28px; height: 28px;
  background: var(--primary);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .75rem; font-weight: 700;
}
.footer__brand-name { color: #fff; font-weight: 700; font-size: .9375rem; }
.footer__desc { font-size: .875rem; line-height: 1.6; max-width: 280px; }

.footer__col h4 { color: #fff; font-size: .875rem; font-weight: 700; margin-bottom: 16px; }
.footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.footer__col li a {
  font-size: .875rem;
  color: rgba(255,255,255,.6);
  transition: color .15s;
}
.footer__col li a:hover { color: var(--primary-light); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8125rem;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__bottom a { color: rgba(255,255,255,.5); }
.footer__bottom a:hover { color: var(--primary-light); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero__inner        { grid-template-columns: 1fr; }
  .hero__visual       { display: none; }
  .features-grid      { grid-template-columns: 1fr; }
  .features-full      { grid-template-columns: 1fr; }
  .diff-grid          { grid-template-columns: 1fr; }
  .about-grid         { grid-template-columns: 1fr; }
  .about-visual       { display: none; }
  .stats-row          { grid-template-columns: 1fr; }
  .footer__inner      { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom     { flex-direction: column; text-align: center; }
}

@media (max-width: 700px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger         { display: flex; }
  .section                { padding: 60px 0; }
  .hero                   { padding: 56px 0 72px; }
  .about-values           { grid-template-columns: 1fr; }
  .cta-banner             { padding: 40px 24px; }
}