/* ═══════════════════════════════════════════════════════════
   EFP Base Styles — Reset, Typography, Animations, Utilities
   ═══════════════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--gray-600);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: var(--primary); color: var(--white); }

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* Accessible focus ring */
:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Skip Link (Accessibility) ───────────────────────────── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--white);
  padding: 8px 16px;
  z-index: 10000;
  font-weight: 600;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; color: var(--white); }

/* ── Container ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: var(--container-wide);
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
}

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--gray-800);
  line-height: 1.15;
  font-weight: 700;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.section-title {
  color: var(--gray-800);
  margin-bottom: var(--space-md);
}

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

.divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-400));
  margin: var(--space-md) 0 var(--space-lg);
  border-radius: 2px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

/* Shimmer effect on buttons */
.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}
.btn:hover::after {
  left: 100%;
}

.btn-primary {
  background: var(--grad-accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
  background: var(--grad-primary);
  color: var(--white);
  border-color: var(--primary);
}
.btn-secondary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-glow-primary);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--gray-300);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
  transform: translateY(-1px);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-loading {
  pointer-events: none;
  opacity: 0.7;
}

/* ── Section Spacing ─────────────────────────────────────── */
.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background: var(--gray-100);
}

.section-warm {
  background: var(--warm-50);
}

/* ── Scroll Progress Bar ─────────────────────────────────── */
#scrollProgressBar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--grad-stripe);
  z-index: 9999;
  transition: width 0.08s linear;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════
   ANIMATION SYSTEM
   Scroll-triggered animations with directional support
   ═══════════════════════════════════════════════════════════ */

/* ── Keyframes ──────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideFromLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideFromRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

@keyframes pulse-ring {
  0%   { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

/* ── Scroll-reveal classes (invisible until .visible) ──── */
.fade-up,
.fade-down,
.slide-left,
.slide-right,
.scale-in,
.fade-in {
  opacity: 0;
  will-change: opacity, transform;
  transition-property: opacity, transform;
  transition-duration: var(--anim-base);
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up      { transform: translateY(30px); }
.fade-down    { transform: translateY(-30px); }
.slide-left   { transform: translateX(-40px); }
.slide-right  { transform: translateX(40px); }
.scale-in     { transform: scale(0.92); }
.fade-in      { transform: none; }

/* Visible state */
.fade-up.visible,
.fade-down.visible,
.slide-left.visible,
.slide-right.visible,
.scale-in.visible,
.fade-in.visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* ── Stagger support via data-delay ─────────────────────── */
/* JS applies transition-delay from data-delay attribute */

/* ── Hover depth classes ─────────────────────────────────── */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-lift);
}

.hover-grow {
  transition: transform var(--transition-base);
}
.hover-grow:hover {
  transform: scale(1.03);
}

/* ── Background decorative elements ─────────────────────── */
.bg-dots {
  position: relative;
}
.bg-dots::before {
  content: '';
  position: absolute;
  top: 40px;
  right: -20px;
  width: 120px;
  height: 120px;
  background-image: radial-gradient(circle, var(--primary-200) 1.5px, transparent 1.5px);
  background-size: 16px 16px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

.bg-blob {
  position: relative;
  overflow: hidden;
}
.bg-blob::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(27,95,168,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── Certification Tags — defined in pages.css ──────────── */

/* ── Utility ─────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted  { color: var(--gray-500); }
.text-white  { color: var(--white); }
.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;
}

/* ── Reduced motion overrides ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .fade-up, .fade-down, .slide-left, .slide-right, .scale-in, .fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .hover-lift:hover,
  .hover-grow:hover {
    transform: none !important;
  }
}