/* ============================================================
   ACADOVIA — Design Tokens
   School ERP · Brand foundation
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Geist:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* ─── Palette · Ink & Pine ─── */
  --ink:        #2D1B47;   /* deep eggplant — premium, clearly purple, never black */
  --ink-soft:   #3C2659;
  --pine:       #5B3FA0;   /* PRIMARY — iris purple, premium & warm */
  --pine-deep:  #3F2A78;
  --pine-soft:  #6E54B0;
  --sage:       #9387B0;   /* lavender-gray · quiet supporting */
  --sage-soft:  #C4BED4;

  /* ─── Palette · Warm accents ─── */
  --saffron:      #E07A3E;  /* ACCENT — Indian warmth, energetic CTA */
  --saffron-deep: #C2622A;
  --saffron-soft: #F4A57A;
  --butter:       #F4DDA8;  /* soft secondary surface */
  --butter-soft:  #FAEDC9;

  /* ─── Neutrals (warm) ─── */
  --cream:    #FAF6EE;   /* PRIMARY background — warm paper */
  --paper:    #FFFEFB;   /* alternate canvas */
  --mist:     #E9E2D2;   /* borders, dividers */
  --mist-soft:#F1ECDF;
  --stone:    #6E7B77;   /* secondary text */
  --slate:    #4C5A56;   /* body text */
  --ash:      #2E3D38;   /* strong body */

  /* ─── Glass layers ─── */
  --glass-ink:    rgba(45, 27, 71, 0.55);
  --glass-pine:   rgba(91, 63, 160, 0.18);
  --glass-paper:  rgba(255, 254, 251, 0.62);
  --glass-cream:  rgba(250, 246, 238, 0.72);
  --glass-line:   rgba(45, 27, 71, 0.08);
  --glass-line-2: rgba(255, 255, 255, 0.55);

  /* ─── Type ─── */
  --font-display: 'Instrument Serif', 'Source Serif Pro', Georgia, serif;
  --font-sans:    'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Scale (fluid) */
  --t-d1: clamp(56px, 8.4vw, 124px);
  --t-d2: clamp(44px, 6.2vw, 88px);
  --t-h1: clamp(36px, 4.4vw, 64px);
  --t-h2: clamp(28px, 3.0vw, 44px);
  --t-h3: clamp(22px, 2.0vw, 30px);
  --t-h4: 20px;
  --t-body-lg: 18px;
  --t-body: 16px;
  --t-sm: 14px;
  --t-xs: 12.5px;
  --t-eyebrow: 12px;

  /* ─── Spacing ─── */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 32px;
  --r-pill: 999px;

  /* ─── Shadows ─── */
  --shadow-sm:  0 1px 2px rgba(45,27,71,0.06), 0 1px 1px rgba(45,27,71,0.04);
  --shadow-md:  0 8px 24px -8px rgba(45,27,71,0.12), 0 2px 6px rgba(45,27,71,0.05);
  --shadow-lg:  0 24px 60px -20px rgba(45,27,71,0.22), 0 8px 16px -8px rgba(45,27,71,0.08);
  --shadow-glow: 0 0 0 1px rgba(91,63,160,0.10), 0 30px 80px -30px rgba(91,63,160,0.35);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast: 180ms;
  --dur: 320ms;
  --dur-slow: 600ms;
}

/* ============================================================
   Base reset & global type
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--cream);
  color: var(--ash);
  font-family: var(--font-sans);
  font-size: var(--t-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.04;
  margin: 0;
}

h1 { font-size: var(--t-h1); }
h2 { font-size: var(--t-h2); }
h3 { font-size: var(--t-h3); }
h4 { font-size: var(--t-h4); font-family: var(--font-sans); font-weight: 600; letter-spacing: -0.005em; line-height: 1.25; }

p { margin: 0; color: var(--slate); }
a  { color: inherit; text-decoration: none; }
button { font-family: inherit; }

::selection { background: var(--saffron); color: var(--paper); }

/* ============================================================
   Utility primitives reused across pages
   ============================================================ */

.wrap { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.wrap-narrow { width: 100%; max-width: 980px; margin: 0 auto; padding: 0 28px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: var(--t-eyebrow);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pine);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--pine);
  opacity: 0.6;
}

.italic-accent { font-style: italic; color: var(--pine); font-family: var(--font-display); font-weight: 400; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--r-pill);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur) var(--ease-out), background var(--dur) var(--ease-out), color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
  will-change: transform;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--ink);
  color: var(--cream);
}
.btn-primary:hover { background: var(--pine-deep); box-shadow: 0 12px 28px -10px rgba(91,63,160,0.55); }

.btn-accent {
  background: var(--saffron);
  color: var(--ink);
}
.btn-accent:hover { background: var(--saffron-deep); color: var(--paper); box-shadow: 0 12px 28px -10px rgba(224,122,62,0.55); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(45,27,71,0.16);
}
.btn-ghost:hover { background: var(--paper); border-color: var(--ink); }

.btn-glass {
  background: var(--glass-paper);
  color: var(--ink);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-line-2);
  box-shadow: var(--shadow-sm);
}
.btn-glass:hover { background: rgba(255,254,251,0.85); }

.btn .arrow {
  width: 14px; height: 14px;
  transition: transform var(--dur) var(--ease-out);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ─── Cards & glass surfaces ─── */
.surface {
  background: var(--paper);
  border: 1px solid var(--mist);
  border-radius: var(--r-lg);
  padding: 24px;
}

.glass {
  background: var(--glass-paper);
  -webkit-backdrop-filter: blur(24px) saturate(170%);
  backdrop-filter: blur(24px) saturate(170%);
  border: 1px solid var(--glass-line-2);
  border-radius: var(--r-lg);
  box-shadow: 0 1px 0 var(--glass-line-2) inset, 0 30px 60px -30px rgba(45,27,71,0.18);
}

.glass-dark {
  background: var(--glass-ink);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-lg);
  color: var(--cream);
}

/* ─── Reveal animation system (IntersectionObserver hooked) ─── */
/* Note: content is visible by default; .anim-on class on <html> opts into reveal animation */
.reveal { transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.anim-on .reveal:not(.in) { opacity: 0; transform: translateY(18px); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 60ms; }
.reveal.d2 { transition-delay: 140ms; }
.reveal.d3 { transition-delay: 220ms; }
.reveal.d4 { transition-delay: 300ms; }
.reveal.d5 { transition-delay: 380ms; }

/* ─── Decorative grain (subtle paper texture) ─── */
.grain::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(45,27,71,0.05) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.45;
  mix-blend-mode: multiply;
}

/* ─── Caustic blob — used in hero / section backgrounds ─── */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.7;
}
.blob.pine    { background: radial-gradient(circle, rgba(91,63,160,0.55), transparent 70%); }
.blob.saffron { background: radial-gradient(circle, rgba(224,122,62,0.55), transparent 70%); }
.blob.butter  { background: radial-gradient(circle, rgba(244,221,168,0.85), transparent 70%); }
.blob.sage    { background: radial-gradient(circle, rgba(136,168,154,0.5), transparent 70%); }

/* ─── Tag / chip ─── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--mist-soft);
  border: 1px solid var(--mist);
  color: var(--ash);
  border-radius: var(--r-pill);
  font-size: 12.5px;
  font-weight: 500;
}
.tag.pine    { background: rgba(91,63,160,0.08); border-color: rgba(91,63,160,0.18); color: var(--pine-deep); }
.tag.saffron { background: rgba(224,122,62,0.10); border-color: rgba(224,122,62,0.22); color: var(--saffron-deep); }

/* ─── Hairline ─── */
.hairline { height: 1px; background: var(--mist); border: 0; }

/* ─── Reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ============================================================
   Motion system — premium, alive
   ============================================================ */

/* Gentle blob drift (idle ambient motion) */
@keyframes drift-a {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(28px, -22px, 0); }
}
@keyframes drift-b {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(-32px, 26px, 0); }
}

.blob.pine    { animation: drift-a 18s ease-in-out infinite; }
.blob.saffron { animation: drift-b 22s ease-in-out infinite; }
.blob.butter  { animation: drift-a 24s ease-in-out infinite reverse; }
.blob.sage    { animation: drift-b 20s ease-in-out infinite; }

/* Pulsing live indicator */
@keyframes live-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224,122,62,0.55); transform: scale(1); }
  50%      { box-shadow: 0 0 0 8px rgba(224,122,62,0);   transform: scale(1.12); }
}
.dot-live, .live-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--saffron);
  border-radius: 50%;
  animation: live-pulse 2s ease-in-out infinite;
  vertical-align: middle;
  margin-right: 6px;
}

/* Accent CTA shimmer — subtle gradient sweep */
@keyframes shimmer-sweep {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.btn-accent {
  background-image: linear-gradient(110deg, var(--saffron) 35%, var(--saffron-soft) 50%, var(--saffron) 65%);
  background-size: 220% 100%;
  background-position: 0 0;
  animation: shimmer-sweep 6s ease-in-out infinite;
}

/* Card hover lift — premium tactile feel */
.plan, .module-card, .price-card, .cap, .pillar, .stack-card, .ms-card, .fw-card {
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.plan:hover, .module-card:hover, .price-card:hover, .cap:hover, .pillar:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.module-card:hover { border-color: var(--pine-soft); }

/* Glass widget gentle float (hero floating cards) */
@keyframes float-gentle {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50%      { transform: translate3d(0, -8px, 0); }
}
.fw-card, .ph-card, .ms-card.float {
  animation: float-gentle 7s ease-in-out infinite;
}
.fw-card:nth-of-type(2n) { animation-duration: 9s; animation-delay: -2s; }
.fw-card:nth-of-type(3n) { animation-duration: 11s; animation-delay: -4s; }

/* KPI count-up — the value animates from 0 on view */
[data-count] {
  font-variant-numeric: tabular-nums;
  transition: opacity var(--dur) var(--ease-out);
}

/* Gradient shift on hero background — adds slow ambient motion */
@keyframes bg-drift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}
.hero, .pricing-hero, .modules-hero, .features-hero, .contact-page {
  background-image:
    radial-gradient(ellipse 60% 60% at 30% 20%, rgba(91,63,160,0.06), transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(224,122,62,0.06), transparent 60%);
  background-size: 200% 200%;
  animation: bg-drift 18s ease-in-out infinite;
}

/* Honor reduced motion — override all of the above */
@media (prefers-reduced-motion: reduce) {
  .blob, .fw-card, .ph-card, .ms-card.float,
  .btn-accent, .hero, .pricing-hero, .modules-hero, .features-hero, .contact-page,
  .dot-live, .live-dot,
  .plans-grid > .plan, .price-row > .price-card, .modules-grid > .module-card,
  .caps-grid > .cap, .pillars > .pillar, .mod-section,
  .h-italic-sweep, .estimator-card, .faq-item.open .a {
    animation: none !important;
  }
}

/* ============================================================
   R15 motion extensions — premium, considered, never noisy
   ============================================================ */

/* Stagger entrance for card grids (children of a grid get progressive delays
   when the parent .reveal trips into .in). Implemented via nth-child delay
   when the card itself carries .reveal — falls back gracefully if it doesn't. */
.anim-on .plans-grid > .plan.reveal:not(.in),
.anim-on .price-row > .price-card.reveal:not(.in),
.anim-on .modules-grid > .module-card.reveal:not(.in),
.anim-on .caps-grid > .cap.reveal:not(.in),
.anim-on .pillars > .pillar.reveal:not(.in) {
  opacity: 0;
  transform: translateY(22px);
}
.plans-grid > .plan.reveal:nth-child(1),
.price-row > .price-card.reveal:nth-child(1),
.modules-grid > .module-card.reveal:nth-child(1),
.caps-grid > .cap.reveal:nth-child(1),
.pillars > .pillar.reveal:nth-child(1) { transition-delay: 0ms; }
.plans-grid > .plan.reveal:nth-child(2),
.price-row > .price-card.reveal:nth-child(2),
.modules-grid > .module-card.reveal:nth-child(2),
.caps-grid > .cap.reveal:nth-child(2),
.pillars > .pillar.reveal:nth-child(2) { transition-delay: 100ms; }
.plans-grid > .plan.reveal:nth-child(3),
.price-row > .price-card.reveal:nth-child(3),
.modules-grid > .module-card.reveal:nth-child(3),
.caps-grid > .cap.reveal:nth-child(3),
.pillars > .pillar.reveal:nth-child(3) { transition-delay: 200ms; }
.plans-grid > .plan.reveal:nth-child(4),
.price-row > .price-card.reveal:nth-child(4),
.modules-grid > .module-card.reveal:nth-child(4) { transition-delay: 300ms; }
.modules-grid > .module-card.reveal:nth-child(5) { transition-delay: 380ms; }
.modules-grid > .module-card.reveal:nth-child(6) { transition-delay: 460ms; }

/* Italic-accent: slow saffron sweep through h1 emphasis (used on hero h1 em) */
@keyframes italic-sweep {
  0%   { background-position: 220% 0; }
  100% { background-position: -220% 0; }
}
h1 em.italic-accent {
  background-image: linear-gradient(110deg,
    var(--pine-deep) 30%,
    var(--saffron-deep) 50%,
    var(--pine-deep) 70%);
  background-size: 220% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: italic-sweep 10s ease-in-out infinite;
}

/* Button — micro lift + glow on hover, snappier press */
.btn {
  transition:
    transform 180ms var(--ease-out),
    box-shadow 220ms var(--ease-out),
    background-color 220ms var(--ease-out),
    color 220ms var(--ease-out),
    border-color 220ms var(--ease-out);
  will-change: transform;
}
.btn:hover { transform: translateY(-1.5px); }
.btn:active { transform: translateY(0); transition-duration: 80ms; }
.btn-primary:hover { box-shadow: 0 12px 28px -10px rgba(91,63,160,0.45); }
.btn-accent:hover  { box-shadow: 0 12px 28px -10px rgba(224,122,62,0.45); }

/* Link micro-underline grow */
.site-nav nav a {
  position: relative;
}
.site-nav nav a::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 6px;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 260ms var(--ease-out);
  opacity: 0.6;
}
.site-nav nav a:hover::after,
.site-nav nav a.active::after { transform: scaleX(1); }

/* Estimator card — subtle inner glow on hover (signals interactivity) */
.estimator-card {
  transition: transform 260ms var(--ease-out), box-shadow 260ms var(--ease-out);
}
.estimator-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 70px -22px rgba(21,16,31,0.22);
}

/* FAQ — smoother expand */
.faq-item .a {
  transition: max-height 360ms var(--ease-out);
}

/* Plan featured — gentle breathing scale to draw the eye */
@keyframes plan-breathe {
  0%, 100% { transform: scale(1.02); }
  50%      { transform: scale(1.035); }
}
.plan.featured { animation: plan-breathe 7s ease-in-out infinite; }

/* Soft fade-in for hero stage mockup (desktop only — mobile is below fold) */
@media (min-width: 980px) {
  @keyframes stage-rise {
    0%   { opacity: 0; transform: translateY(28px) scale(0.985); }
    100% { opacity: 1; transform: translateY(0)    scale(1); }
  }
  .anim-on .hero-stage {
    animation: stage-rise 900ms var(--ease-out) 250ms both;
  }
}

@media (prefers-reduced-motion: reduce) {
  .plan.featured { animation: none !important; transform: none !important; }
  h1 em.italic-accent {
    background: none; color: var(--pine-deep);
    -webkit-text-fill-color: var(--pine-deep);
  }
  .btn:hover { transform: none; }
  .site-nav nav a::after { display: none; }
}