/* ============================================
   Touch2Pay design system
   Palette: emerald #10B981 + sky #0EA5E9 on cool slate whites
   Type:    Fraunces (display italic serif) + Manrope (body geometric sans)
   ============================================ */

:root {
  /* Surfaces */
  --bg:                #F8FAFB;
  --bg-alt:            #EFF4F6;
  --bg-surface:        #FFFFFF;
  --bg-dark:           #0F172A;
  --bg-dark-2:         #1E293B;
  --bg-dark-3:         #0B1220;

  /* Brand */
  --primary:           #10B981;
  --primary-hover:     #059669;
  --primary-strong:    #047857;
  --primary-soft:      #D1FAE5;
  --primary-tint:      rgba(16, 185, 129, 0.12);

  /* Accent */
  --accent:            #0EA5E9;
  --accent-hover:      #0284C7;
  --accent-soft:       #E0F2FE;
  --accent-tint:       rgba(14, 165, 233, 0.12);

  /* Text */
  --text:              #0F172A;
  --text-secondary:    #475569;
  --text-muted:        #94A3B8;
  --text-on-dark:      #F1F5F9;
  --text-on-dark-muted:#94A3B8;

  /* Borders */
  --border:            #E2E8F0;
  --border-strong:     #CBD5E1;
  --border-dark:       #334155;
  --border-dark-soft:  rgba(203, 213, 225, 0.12);

  /* Status */
  --success:           #10B981;
  --danger:            #EF4444;
  --warning:           #F59E0B;

  /* Gradients */
  --gradient-brand:    linear-gradient(135deg, #10B981 0%, #0EA5E9 100%);
  --gradient-text:     linear-gradient(120deg, #059669 0%, #0EA5E9 100%);
  --gradient-dark:     linear-gradient(160deg, #0F172A 0%, #1E293B 100%);
  --gradient-hero:     radial-gradient(circle at 85% 8%, rgba(14, 165, 233, 0.10), transparent 55%),
                       radial-gradient(circle at 10% 92%, rgba(16, 185, 129, 0.08), transparent 45%);

  /* Spacing (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Radius */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;
  --r-pill: 9999px;

  /* Shadow — emerald-tinted for brand cohesion */
  --shadow-sm:      0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md:      0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg:      0 16px 48px rgba(15, 23, 42, 0.08);
  --shadow-xl:      0 30px 80px rgba(15, 23, 42, 0.10);
  --shadow-primary: 0 12px 36px rgba(16, 185, 129, 0.22);
  --shadow-accent:  0 12px 36px rgba(14, 165, 233, 0.20);
  --shadow-glow:    0 0 0 1px rgba(16, 185, 129, 0.20), 0 24px 60px -20px rgba(16, 185, 129, 0.35);

  --transition-default: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth:  0.5s cubic-bezier(0.22, 1, 0.36, 1);

  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-family: Manrope, system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  scrollbar-color: var(--primary) var(--bg-alt);
  scrollbar-width: thin;
}

body {
  min-height: 100vh;
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 17px;
  line-height: 1.65;
}

body,
button,
input,
textarea,
select {
  font-family: Manrope, system-ui, sans-serif;
}

main { display: block; }

img, picture, svg, video {
  display: block;
  max-width: 100%;
}

a { color: inherit; text-decoration: none; }

button {
  border: 0;
  background: none;
  cursor: pointer;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

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

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--r-pill);
  border: 2px solid var(--bg-alt);
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4 {
  font-family: Fraunces, 'Times New Roman', Georgia, serif;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.022em;
  line-height: 1.1;
}

h1 {
  font-size: clamp(42px, 6.2vw, 78px);
  letter-spacing: -0.03em;
  line-height: 1.02;
  font-weight: 500;
}

h2 {
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

h3 {
  font-family: Manrope, system-ui, sans-serif;
  font-size: clamp(20px, 1.8vw, 24px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--text);
}

h4 {
  font-family: Manrope, system-ui, sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.65;
}

.lead {
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 58ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: Manrope, system-ui, sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--primary-strong);
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-tint);
}

/* Signature Helcim-style italic highlight — but as emerald-to-sky gradient */
.headline-emph {
  font-family: Fraunces, serif;
  font-style: italic;
  font-weight: 500;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  padding-inline: 0.04em;
}

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

/* ============================================
   Layout primitives
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

.container--wide { max-width: 1320px; }
.container--narrow { max-width: 960px; }

.section {
  padding-block: clamp(72px, 9vw, 128px);
}

.section--soft {
  background: var(--bg-alt);
  position: relative;
}

.section--dark {
  background: var(--gradient-dark);
  color: var(--text-on-dark);
  position: relative;
  overflow: hidden;
}

.section--dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(16, 185, 129, 0.14), transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(14, 165, 233, 0.12), transparent 40%);
  pointer-events: none;
}

.section--dark > * { position: relative; z-index: 1; }

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--text-on-dark);
}

.section--dark p,
.section--dark .lead {
  color: var(--text-on-dark-muted);
}

.section--dark .eyebrow {
  color: var(--primary-soft);
}

.section--dark .eyebrow::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.18);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--r-pill);
  border: 1.5px solid transparent;
  font-family: Manrope, system-ui, sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-default);
  position: relative;
  isolation: isolate;
}

.btn-lg {
  padding: 18px 32px;
  font-size: 17px;
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 1px 2px rgba(4, 120, 87, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.btn-accent {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 1px 2px rgba(3, 105, 161, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-accent:hover,
.btn-accent:focus-visible {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--primary-strong);
  border-color: var(--border-strong);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--bg-surface);
  border-color: var(--primary);
  color: var(--primary-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-ghost-light {
  background: transparent;
  color: var(--text-on-dark);
  border-color: rgba(241, 245, 249, 0.30);
}

.btn-ghost-light:hover,
.btn-ghost-light:focus-visible {
  background: rgba(241, 245, 249, 0.08);
  border-color: var(--text-on-dark);
  transform: translateY(-1px);
}

.btn > .btn-arrow,
.btn::after {
  content: "→";
  display: inline-block;
  transition: transform var(--transition-default);
}

.btn:hover::after,
.btn:hover > .btn-arrow {
  transform: translateX(4px);
}

/* ============================================
   Components
   ============================================ */
.card {
  position: relative;
  padding: clamp(24px, 2.4vw, 32px);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: all var(--transition-default);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-lg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.005em;
}

.chip--accent {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.chip--dark {
  background: rgba(16, 185, 129, 0.14);
  color: var(--primary-soft);
}

.icon-box {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  background: var(--primary-soft);
  color: var(--primary-strong);
  flex-shrink: 0;
}

.icon-box--accent {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

/* Dot grid backdrop — subtle texture */
.dot-grid {
  background-image: radial-gradient(circle, rgba(15, 23, 42, 0.055) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* Grain texture overlay — adds premium paper feel */
.grain::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}

/* ============================================
   Forms
   ============================================ */
.form-field {
  display: grid;
  gap: 8px;
}

.form-field label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-surface);
  font-size: 15px;
  color: var(--text);
  transition: border-color var(--transition-default), box-shadow var(--transition-default);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 0;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-tint);
}

/* ============================================
   FAQ accordion (native details)
   ============================================ */
details {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition-default);
}

details[open] {
  border-color: var(--primary-soft);
}

summary {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding-right: 40px;
  font-family: Manrope, system-ui, sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-default);
}

summary::-webkit-details-marker { display: none; }

summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-alt);
  color: var(--primary-strong);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  transition: all var(--transition-default);
}

details[open] summary::after {
  content: "–";
  background: var(--primary);
  color: #FFFFFF;
  transform: translateY(-50%) rotate(180deg);
}

summary:hover { color: var(--primary-strong); }

details > :not(summary) {
  margin-top: 16px;
  max-width: 72ch;
  color: var(--text-secondary);
}

/* ============================================
   Reveal (CSS-only, no JS race condition)
   ============================================ */
.reveal {
  opacity: 1;
  transform: none;
}

@keyframes revealUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  html.js-ready .reveal {
    animation: revealUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
    animation-delay: var(--reveal-delay, 0ms);
  }
}

/* ============================================
   Nav (shared shell)
   ============================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(248, 250, 251, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-default), border-color var(--transition-default), box-shadow var(--transition-default);
}

.site-nav.is-scrolled {
  background: rgba(255, 255, 255, 0.88);
  border-bottom-color: var(--border);
  box-shadow: 0 2px 20px rgba(15, 23, 42, 0.04);
}

.site-nav__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--nav-height);
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.site-nav__logo {
  height: 34px;
  width: auto;
}

.site-nav__links {
  display: none;
  list-style: none;
}

.site-nav__actions {
  display: none;
}

.site-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  color: var(--text);
}

.site-nav__toggle-box {
  display: grid;
  gap: 5px;
  width: 22px;
}

.site-nav__toggle-line {
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.site-nav__drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(85vw, 360px);
  padding: 24px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform var(--transition-smooth);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.site-nav__drawer.is-open { transform: translateX(0); }

.site-nav__drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.site-nav__close {
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  color: var(--text);
}

.site-nav__close-icon { font-size: 28px; line-height: 1; }

.site-nav__drawer-links {
  display: grid;
  gap: 4px;
  list-style: none;
}

.site-nav__drawer-link {
  display: block;
  padding: 14px 12px;
  border-radius: var(--r-sm);
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.site-nav__drawer-link:hover { background: var(--bg-alt); color: var(--primary-strong); }

.site-nav__drawer-cta {
  margin-top: auto;
  display: grid;
  gap: 12px;
}

.site-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 1050;
  border: 0;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  display: block;
  padding: clamp(64px, 8vw, 96px) 0 40px;
  background: var(--gradient-dark);
  color: var(--text-on-dark-muted);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(16, 185, 129, 0.12), transparent 40%);
  pointer-events: none;
}

.site-footer > * { position: relative; z-index: 1; }

.site-footer__grid {
  display: grid;
  gap: clamp(40px, 5vw, 64px);
  margin-bottom: 48px;
}

.site-footer__col h4 {
  margin-bottom: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-on-dark);
  font-family: Manrope, system-ui, sans-serif;
}

.site-footer__col ul {
  display: grid;
  gap: 12px;
  list-style: none;
}

.site-footer__col a {
  color: var(--text-on-dark-muted);
  font-size: 15px;
  transition: color var(--transition-default);
}

.site-footer__col a:hover { color: var(--accent); }

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border-dark-soft);
  font-size: 13px;
  color: var(--text-on-dark-muted);
}

.site-footer__socials {
  display: flex;
  gap: 16px;
}

.site-footer__socials a {
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-dark-soft);
  font-size: 13px;
}

.site-footer__socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.35); }
  50%      { box-shadow: 0 0 0 12px rgba(16, 185, 129, 0); }
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .site-nav__links {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-left: auto;
    list-style: none;
  }

  .site-nav__link {
    position: relative;
    font-family: Manrope, system-ui, sans-serif;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.005em;
    color: var(--text);
    transition: color var(--transition-default);
  }

  .site-nav__link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -6px;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: 20px;
    height: 2px;
    background: var(--gradient-text);
    border-radius: 2px;
    transition: transform var(--transition-default);
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    color: var(--primary-strong);
  }

  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after {
    transform: translateX(-50%) scaleX(1);
  }

  .site-nav__actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: 32px;
  }

  .site-nav__toggle,
  .site-nav__drawer,
  .site-nav__overlay {
    display: none !important;
  }

  .site-footer__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}