:root{
  /* Brand (Professional, minimal, enterprise-ready) */
  --sg-font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --sg-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Enterprise palette: cool neutrals + corporate blue */
  --sg-bg: #F6F8FC;
  --sg-surface: rgba(255,255,255,.78);
  --sg-surface-solid: #FFFFFF;
  --sg-surface-2: rgba(255,255,255,.62);
  --sg-border: rgba(15, 23, 42, .10);
  --sg-border-strong: rgba(15, 23, 42, .16);

  --sg-text: #0F172A;         /* slate-900 */
  --sg-text-2: #334155;       /* slate-700 */
  --sg-text-3: #64748B;       /* slate-500 */
  --sg-muted: rgba(15,23,42,.06);

  --sg-primary: #1D4ED8;      /* enterprise blue */
  --sg-primary-2: #2563EB;
  --sg-primary-3: #1E40AF;
  --sg-accent: #0EA5E9;       /* sky */
  --sg-accent-2: #38BDF8;

  --sg-success: #16A34A;
  --sg-warning: #D97706;
  --sg-danger: #DC2626;
  --sg-info: #0284C7;

  /* Gradients / glass */
  --sg-grad-hero: radial-gradient(1200px 600px at 20% 10%, rgba(37,99,235,.18), rgba(14,165,233,.10) 40%, rgba(255,255,255,0) 70%), radial-gradient(900px 500px at 90% 0%, rgba(14,165,233,.14), rgba(255,255,255,0) 60%), linear-gradient(180deg, #FFFFFF 0%, #F6F8FC 100%);
  --sg-grad-primary: linear-gradient(135deg, var(--sg-primary) 0%, var(--sg-accent) 100%);
  --sg-grad-soft: linear-gradient(135deg, rgba(37,99,235,.10) 0%, rgba(14,165,233,.08) 55%, rgba(255,255,255,0) 100%);

  /* Shadows */
  --sg-shadow-sm: 0 8px 18px rgba(15, 23, 42, .06);
  --sg-shadow-md: 0 14px 34px rgba(15, 23, 42, .10);
  --sg-shadow-lg: 0 22px 60px rgba(15, 23, 42, .14);

  /* Radius */
  --sg-radius-sm: 12px;
  --sg-radius-md: 16px;
  --sg-radius-lg: 22px;
  --sg-radius-pill: 999px;

  /* Spacing */
  --sg-container: 1200px;

  /* Motion */
  --sg-ease: cubic-bezier(.2,.8,.2,1);
  --sg-dur-1: 140ms;
  --sg-dur-2: 220ms;
  --sg-dur-3: 360ms;

  /* Focus */
  --sg-focus: 0 0 0 .25rem rgba(37, 99, 235, .18);

  /* Toast */
  --sg-toast-z: 1080;
}

html{scroll-behavior:smooth;}

body{
  font-family: var(--sg-font-sans);
  background: var(--sg-bg);
  color: var(--sg-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,svg,video{max-width:100%;height:auto;}

a{color: var(--sg-primary); text-decoration: none;}
a:hover{color: var(--sg-primary-3);}

::selection{background: rgba(37,99,235,.18);}

/* Bootstrap harmony */
:where(.container, .container-fluid){position:relative;}

/* Utilities */
.sg-container{max-width: var(--sg-container);}
.sg-textMuted{color: var(--sg-text-3) !important;}
.sg-bgSurface{background: var(--sg-surface-solid) !important;}
.sg-glass{
  background: var(--sg-surface);
  border: 1px solid var(--sg-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.sg-softShadow{box-shadow: var(--sg-shadow-md);}
.sg-rounded{border-radius: var(--sg-radius-md);}
.sg-roundedLg{border-radius: var(--sg-radius-lg);}
.sg-border{border: 1px solid var(--sg-border) !important;}
.sg-divider{height:1px;background: var(--sg-border);}
.sg-section{padding: clamp(2.5rem, 4vw, 4.5rem) 0;}
.sg-sectionTight{padding: clamp(2rem, 3.2vw, 3.5rem) 0;}
.sg-kicker{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.35rem .75rem;
  border-radius: var(--sg-radius-pill);
  background: rgba(37,99,235,.10);
  color: var(--sg-primary-3);
  border: 1px solid rgba(37,99,235,.18);
  font-weight: 600;
  font-size: .85rem;
}

/* Typography */
.sg-display{
  letter-spacing: -0.02em;
  font-weight: 750;
  line-height: 1.08;
}
.sg-h1{font-size: clamp(2rem, 3.6vw, 3.25rem);}
.sg-h2{font-size: clamp(1.6rem, 2.6vw, 2.25rem);}
.sg-h3{font-size: clamp(1.2rem, 1.8vw, 1.5rem);}
.sg-lead{font-size: 1.05rem; color: var(--sg-text-2);}

/* Navbar */
.sg-navbar{
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: background var(--sg-dur-2) var(--sg-ease), box-shadow var(--sg-dur-2) var(--sg-ease), border-color var(--sg-dur-2) var(--sg-ease);
  background: rgba(246,248,252,.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15,23,42,.06);
}
.sg-navbar.sg-navbarScrolled{
  background: rgba(255,255,255,.82);
  box-shadow: var(--sg-shadow-sm);
  border-bottom-color: var(--sg-border);
}
.sg-navbar .navbar-brand{
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--sg-text);
}
.sg-navbar .navbar-brand span{color: var(--sg-primary);}
.sg-navbar .nav-link{
  color: var(--sg-text-2);
  font-weight: 600;
  border-radius: 10px;
  padding: .5rem .75rem;
  transition: background var(--sg-dur-1) var(--sg-ease), color var(--sg-dur-1) var(--sg-ease);
}
.sg-navbar .nav-link:hover{background: rgba(37,99,235,.08); color: var(--sg-primary-3);}
.sg-navbar .nav-link.sg-active,
.sg-navbar .nav-link.active{
  background: rgba(37,99,235,.12);
  color: var(--sg-primary-3);
}
.sg-navbar .navbar-toggler{
  border-color: rgba(15,23,42,.12);
  border-radius: 12px;
}
.sg-navbar .navbar-toggler:focus{box-shadow: var(--sg-focus);}

/* Hero */
.sg-hero{
  background: var(--sg-grad-hero);
  position: relative;
  overflow: hidden;
}
.sg-hero::before{
  content:"";
  position:absolute;
  inset:-2px;
  background: var(--sg-grad-soft);
  opacity:.9;
  pointer-events:none;
}
.sg-hero > .container,
.sg-hero > .container-fluid{position:relative; z-index:1;}

.sg-heroCard{
  border-radius: var(--sg-radius-lg);
  background: var(--sg-surface);
  border: 1px solid var(--sg-border);
  box-shadow: var(--sg-shadow-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* Sections */
.sg-sectionHeader{max-width: 760px;}
.sg-sectionHeader .sg-lead{margin-top:.75rem;}

/* Cards */
.sg-card{
  border-radius: var(--sg-radius-md);
  background: var(--sg-surface);
  border: 1px solid var(--sg-border);
  box-shadow: var(--sg-shadow-sm);
  transition: transform var(--sg-dur-2) var(--sg-ease), box-shadow var(--sg-dur-2) var(--sg-ease), border-color var(--sg-dur-2) var(--sg-ease);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.sg-card:hover{
  transform: translateY(-3px);
  box-shadow: var(--sg-shadow-md);
  border-color: rgba(37,99,235,.20);
}
.sg-cardHeaderIcon{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display:grid;
  place-items:center;
  background: rgba(37,99,235,.10);
  border: 1px solid rgba(37,99,235,.18);
  color: var(--sg-primary-3);
}

/* Buttons */
.sg-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
  border-radius: 14px;
  padding: .75rem 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: transform var(--sg-dur-1) var(--sg-ease), box-shadow var(--sg-dur-2) var(--sg-ease), background var(--sg-dur-2) var(--sg-ease), border-color var(--sg-dur-2) var(--sg-ease), color var(--sg-dur-2) var(--sg-ease);
  user-select:none;
}
.sg-btn:active{transform: translateY(1px);}
.sg-btn:focus{outline:none; box-shadow: var(--sg-focus);}

.sg-btnPrimary{
  background: var(--sg-grad-primary);
  color: #fff;
  box-shadow: 0 14px 30px rgba(37,99,235,.22);
}
.sg-btnPrimary:hover{color:#fff; box-shadow: 0 18px 40px rgba(37,99,235,.26);}

.sg-btnOutline{
  background: rgba(255,255,255,.55);
  color: var(--sg-primary-3);
  border-color: rgba(37,99,235,.22);
}
.sg-btnOutline:hover{background: rgba(37,99,235,.08); color: var(--sg-primary-3);}

.sg-btnGhost{
  background: transparent;
  color: var(--sg-text-2);
  border-color: rgba(15,23,42,.10);
}
.sg-btnGhost:hover{background: rgba(15,23,42,.04); color: var(--sg-text);}

.sg-btnSm{padding: .55rem .85rem; border-radius: 12px; font-weight: 700;}
.sg-btnBlock{width:100%;}

/* Spinner inside buttons */
.btn-spinner{
  width: 1rem;
  height: 1rem;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,.55);
  border-top-color: rgba(255,255,255,0);
  display:none;
  animation: sg-spin .8s linear infinite;
}
.sg-btnOutline .btn-spinner,
.sg-btnGhost .btn-spinner{
  border-color: rgba(37,99,235,.35);
  border-top-color: rgba(37,99,235,0);
}
@keyframes sg-spin{to{transform: rotate(360deg);}}

/* Forms */
.sg-formCard{padding: 1.25rem;}
.sg-formTitle{font-weight: 800; letter-spacing: -0.02em;}

.api-form input,
.api-form select,
.api-form textarea{
  width:100%;
  border-radius: 14px;
  border: 1px solid var(--sg-border);
  background: rgba(255,255,255,.72);
  padding: .75rem .9rem;
  color: var(--sg-text);
  transition: box-shadow var(--sg-dur-2) var(--sg-ease), border-color var(--sg-dur-2) var(--sg-ease), background var(--sg-dur-2) var(--sg-ease);
}
.api-form textarea{min-height: 120px; resize: vertical;}
.api-form input::placeholder,
.api-form textarea::placeholder{color: rgba(100,116,139,.85);}
.api-form input:focus,
.api-form select:focus,
.api-form textarea:focus{
  outline:none;
  box-shadow: var(--sg-focus);
  border-color: rgba(37,99,235,.35);
  background: rgba(255,255,255,.90);
}
.api-form .sg-fieldHint{color: var(--sg-text-3); font-size: .9rem;}

.api-form button[type="submit"]{
  width:100%;
  border-radius: 14px;
  padding: .85rem 1rem;
  font-weight: 800;
  border: 1px solid transparent;
  background: var(--sg-grad-primary);
  color: #fff;
  box-shadow: 0 14px 30px rgba(37,99,235,.22);
  transition: transform var(--sg-dur-1) var(--sg-ease), box-shadow var(--sg-dur-2) var(--sg-ease), filter var(--sg-dur-2) var(--sg-ease);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6rem;
}
.api-form button[type="submit"]:hover{filter: saturate(1.05); box-shadow: 0 18px 40px rgba(37,99,235,.26);}
.api-form button[type="submit"]:active{transform: translateY(1px);}
.api-form button[type="submit"]:focus{outline:none; box-shadow: var(--sg-focus);}
.api-form button[disabled]{opacity:.75; cursor:not-allowed;}

/* Validation states */
.sg-invalid{
  border-color: rgba(220,38,38,.45) !important;
  box-shadow: 0 0 0 .25rem rgba(220,38,38,.14) !important;
}
.sg-valid{
  border-color: rgba(22,163,74,.35) !important;
  box-shadow: 0 0 0 .25rem rgba(22,163,74,.12) !important;
}
.sg-errorText{color: var(--sg-danger); font-size: .9rem;}

/* Testimonials */
.sg-testimonial{
  padding: 1.25rem;
}
.sg-quote{
  color: var(--sg-text-2);
  font-size: 1rem;
}
.sg-avatar{
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: rgba(37,99,235,.12);
  border: 1px solid rgba(37,99,235,.18);
  display:grid;
  place-items:center;
  font-weight: 800;
  color: var(--sg-primary-3);
}

/* Stats */
.sg-stat{
  padding: 1.1rem;
}
.sg-statValue{font-weight: 900; letter-spacing: -0.02em; font-size: 1.7rem;}
.sg-statLabel{color: var(--sg-text-3); font-weight: 600;}

/* CTA */
.sg-cta{
  border-radius: var(--sg-radius-lg);
  background: linear-gradient(135deg, rgba(29,78,216,.12) 0%, rgba(14,165,233,.10) 55%, rgba(255,255,255,.65) 100%);
  border: 1px solid rgba(37,99,235,.18);
  box-shadow: var(--sg-shadow-md);
  overflow:hidden;
  position:relative;
}
.sg-cta::after{
  content:"";
  position:absolute;
  inset:auto -20% -40% auto;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at 30% 30%, rgba(37,99,235,.25), rgba(14,165,233,.12) 45%, rgba(255,255,255,0) 70%);
  transform: rotate(18deg);
  pointer-events:none;
}
.sg-cta > *{position:relative; z-index:1;}

/* Footer */
.sg-footer{
  padding: 2.25rem 0;
  color: var(--sg-text-2);
  border-top: 1px solid var(--sg-border);
  background: rgba(255,255,255,.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.sg-footer a{color: var(--sg-text-2);}
.sg-footer a:hover{color: var(--sg-primary-3);}

/* Toasts */
.sg-toastRegion{
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: var(--sg-toast-z);
  display:flex;
  flex-direction:column;
  gap: .75rem;
  max-width: min(420px, calc(100vw - 2rem));
}
.sg-toast{
  border-radius: 16px;
  padding: .9rem 1rem;
  background: rgba(255,255,255,.86);
  border: 1px solid var(--sg-border);
  box-shadow: var(--sg-shadow-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display:flex;
  gap: .75rem;
  align-items:flex-start;
  animation: sg-toastIn var(--sg-dur-3) var(--sg-ease) both;
}
@keyframes sg-toastIn{
  from{transform: translateY(10px); opacity: 0;}
  to{transform: translateY(0); opacity: 1;}
}
.sg-toastIcon{
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display:grid;
  place-items:center;
  flex: 0 0 auto;
  border: 1px solid transparent;
}
.sg-toastBody{flex:1 1 auto; min-width: 0;}
.sg-toastTitle{font-weight: 900; letter-spacing: -0.01em; margin: 0; font-size: .98rem;}
.sg-toastMsg{margin: .15rem 0 0; color: var(--sg-text-2); font-size: .95rem;}
.sg-toastClose{
  appearance:none;
  border: 0;
  background: transparent;
  color: var(--sg-text-3);
  padding: .15rem .25rem;
  border-radius: 10px;
  line-height: 1;
  font-size: 1.1rem;
}
.sg-toastClose:hover{background: rgba(15,23,42,.06); color: var(--sg-text);}
.sg-toastSuccess .sg-toastIcon{background: rgba(22,163,74,.12); border-color: rgba(22,163,74,.22); color: var(--sg-success);}
.sg-toastError .sg-toastIcon{background: rgba(220,38,38,.10); border-color: rgba(220,38,38,.22); color: var(--sg-danger);}
.sg-toastInfo .sg-toastIcon{background: rgba(2,132,199,.12); border-color: rgba(2,132,199,.22); color: var(--sg-info);}

/* Tables / dashboard-like visuals for About page */
.sg-tableWrap{
  border-radius: var(--sg-radius-lg);
  overflow:hidden;
  border: 1px solid var(--sg-border);
  background: rgba(255,255,255,.70);
  box-shadow: var(--sg-shadow-sm);
}
.sg-tableWrap .table{margin:0;}
.sg-tableWrap .table thead th{
  background: rgba(37,99,235,.06);
  color: var(--sg-text-2);
  border-bottom-color: rgba(15,23,42,.08);
  font-weight: 800;
}
.sg-tableWrap .table td,
.sg-tableWrap .table th{vertical-align: middle;}

.sg-badge{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.35rem .6rem;
  border-radius: var(--sg-radius-pill);
  font-weight: 800;
  font-size: .78rem;
  border: 1px solid transparent;
}
.sg-badgePrimary{background: rgba(37,99,235,.10); border-color: rgba(37,99,235,.20); color: var(--sg-primary-3);}
.sg-badgeSuccess{background: rgba(22,163,74,.10); border-color: rgba(22,163,74,.20); color: #166534;}
.sg-badgeWarning{background: rgba(217,119,6,.10); border-color: rgba(217,119,6,.22); color: #92400E;}
.sg-badgeDanger{background: rgba(220,38,38,.10); border-color: rgba(220,38,38,.22); color: #991B1B;}

/* Responsive tweaks */
@media (max-width: 991.98px){
  .sg-heroCard{box-shadow: var(--sg-shadow-md);}
}

@media (max-width: 575.98px){
  .sg-navbar .nav-link{padding: .6rem .75rem;}
  .sg-toastRegion{right: .75rem; bottom: .75rem;}
}