/* ==========================================================================
   IT SHIELDS — Core Design System
   Premium enterprise MSP theme. Mobile-first, accessible (WCAG AA), dark mode.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand */
  --green: #37C95A;
  --green-600: #2BB44C;
  --green-700: #1F9E3F;
  --blue: #263B7D;
  --navy: #1B2A52;
  --accent: #4E7BFF;
  --accent-600: #3A67EB;

  /* Neutrals (light theme) */
  --white: #FFFFFF;
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --bg-elev: #FFFFFF;
  --surface: #FFFFFF;
  --border: #E6EAF2;
  --text: #14203D;
  --text-muted: #5A6B8C;
  --text-invert: #FFFFFF;
  --hero-bg: #0E1834;

  /* Gradients */
  --grad-brand: linear-gradient(135deg, var(--green), #45850c);
  --grad-accent: linear-gradient(135deg, var(--accent), var(--green));
  --grad-hero: linear-gradient(150deg, #16224a 0%, #1B2A52 45%, #263B7D 100%);

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-display: 'Manrope', 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* Radius */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* Shadows (soft, premium) */
  --sh-xs: 0 1px 2px rgba(16, 24, 40, .06);
  --sh-sm: 0 2px 8px rgba(16, 24, 40, .06);
  --sh-md: 0 8px 24px rgba(16, 24, 40, .08);
  --sh-lg: 0 20px 48px rgba(16, 24, 40, .12);
  --sh-xl: 0 32px 70px rgba(16, 24, 40, .16);
  --sh-green: 0 12px 30px rgba(55, 201, 90, .32);
  --sh-blue: 0 12px 30px rgba(38, 59, 125, .28);

  /* Layout */
  --container: 1200px;
  --container-wide: 1320px;
  --nav-h: 76px;

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html.no-smooth { scroll-behavior: auto; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background .4s var(--ease), color .4s var(--ease);
}

img, svg, video { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

::selection { background: var(--green); color: #fff; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   3. Layout helpers
   -------------------------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 24px; }
.container-wide { max-width: var(--container-wide); }

.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-alt { background: var(--bg-alt); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--green-700);
  background: rgba(55, 201, 90, .1);
  padding: 7px 16px; border-radius: var(--r-pill);
  margin-bottom: 18px;
}
[data-theme="dark"] .eyebrow { color: var(--green); }

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head.left { margin-inline: 0; text-align: left; }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); margin-bottom: 16px; }
.section-head p { font-size: 18px; color: var(--text-muted); }

.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.green-text { color: var(--green); }

/* --------------------------------------------------------------------------
   4. Buttons
   -------------------------------------------------------------------------- */
.btn {
  --btn-bg: var(--green);
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-display);
  font-weight: 700; font-size: 15.5px;
  padding: 14px 28px;
  border-radius: var(--r-pill);
  background: var(--btn-bg); color: #fff;
  position: relative; overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--green); box-shadow: var(--sh-green); }
.btn-primary:hover { background: var(--green-600); box-shadow: 0 16px 38px rgba(55,201,90,.4); }

.btn-secondary { background: var(--blue); box-shadow: var(--sh-blue); }
.btn-secondary:hover { background: var(--accent); }

.btn-accent { background: var(--accent); box-shadow: 0 12px 30px rgba(78,123,255,.3); }
.btn-accent:hover { background: var(--accent-600); }

.btn-outline { background: transparent; color: var(--text); border: 2px solid var(--border); }
.btn-outline:hover { border-color: var(--green); color: var(--green-700); background: rgba(55,201,90,.06); }

.btn-ghost-light { background: rgba(255,255,255,.1); color: #fff; border: 1px solid rgba(255,255,255,.25); backdrop-filter: blur(8px); }
.btn-ghost-light:hover { background: rgba(255,255,255,.2); }

.btn-lg { padding: 17px 36px; font-size: 17px; }
.btn-block { display: flex; width: 100%; }

/* Ripple element injected by JS */
.ripple { position: absolute; border-radius: 50%; background: rgba(255,255,255,.5); transform: scale(0); animation: ripple .6s linear; pointer-events: none; }
@keyframes ripple { to { transform: scale(4); opacity: 0; } }

/* --------------------------------------------------------------------------
   5. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 30px;
  box-shadow: var(--sh-sm);
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); border-color: transparent; }

.card-icon {
  width: 58px; height: 58px; border-radius: var(--r-md);
  display: grid; place-items: center;
  background: var(--grad-brand); color: #fff;
  margin-bottom: 20px;
  box-shadow: var(--sh-green);
  transition: transform .35s var(--ease-out);
}
.card:hover .card-icon { transform: scale(1.08) rotate(-4deg); }
.card-icon svg { width: 28px; height: 28px; }

.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--text-muted); font-size: 15px; }

.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 18px; font-weight: 700; font-size: 14.5px; color: var(--green-700);
  transition: gap .25s var(--ease);
}
[data-theme="dark"] .card-link { color: var(--green); }
.card-link svg { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.card:hover .card-link { gap: 11px; }

/* Glass card (used on hero) */
.glass {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-radius: var(--r-lg);
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
}

/* --------------------------------------------------------------------------
   6. Utility
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: 12px; } .gap-md { gap: 20px; }
.hidden { display: none !important; }

.badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 700; padding: 6px 14px;
  border-radius: var(--r-pill); background: var(--bg-alt);
  border: 1px solid var(--border); color: var(--text-muted);
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 9999;
  background: var(--green); color: #fff; padding: 12px 20px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* Reveal-on-scroll base state (JS adds .in) */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal-delay="3"] { transition-delay: .24s; }
[data-reveal-delay="4"] { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* Responsive grid collapse */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding-inline: 18px; }
}