/* Tokens from the Minimalist Modern design system.
   --accent-strong replaces #4D7CFF as the button gradient end: white on #4D7CFF is 3.72:1, on #2E66FF it is 4.71:1. */
:root {
  --background: #FAFAFA;
  --foreground: #0F172A;
  --muted: #F1F5F9;
  --muted-foreground: #64748B;
  --accent: #0052FF;
  --accent-secondary: #4D7CFF;
  --accent-strong: #2E66FF;
  --accent-on-dark: #7FA2FF;
  --border: #E2E8F0;
  --card: #FFFFFF;
  --on-dark: #FFFFFF;
  --on-dark-muted: #CBD5E1;

  --font-display: "Calistoga", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-accent: 0 4px 14px rgba(0, 82, 255, 0.25);
  --shadow-accent-lg: 0 8px 24px rgba(0, 82, 255, 0.35);

  --section-y: clamp(4.5rem, 3rem + 7vw, 9rem);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 400;
  margin: 0;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

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

.container {
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  background: var(--foreground);
  color: var(--on-dark);
  border-radius: var(--radius-md);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.gradient-text {
  white-space: nowrap;
  background: linear-gradient(to right, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Header: brand + language on row one, nav on row two for phones; one row from tablet up. */
.header-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "brand lang"
    "nav nav";
  align-items: center;
  column-gap: 1rem;
  padding-top: 0.75rem;
  padding-bottom: 0.25rem;
}

.wordmark {
  grid-area: brand;
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 0.95rem + 0.5vw, 1.375rem);
  line-height: 1.2;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.site-nav {
  grid-area: nav;
  margin-left: -0.875rem;
}

.nav-list {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lang-switch {
  grid-area: lang;
  display: inline-flex;
  gap: 2px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
}

.lang-switch button {
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.625rem;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: var(--muted-foreground);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 200ms ease-out, background-color 200ms ease-out;
}

.lang-switch button:hover {
  color: var(--foreground);
}

.lang-switch button[aria-pressed="true"] {
  background: var(--foreground);
  color: var(--on-dark);
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.875rem;
  border-radius: var(--radius-md);
  color: var(--muted-foreground);
  font-weight: 500;
  text-decoration: none;
  transition: color 200ms ease-out, background-color 200ms ease-out;
}

.nav-list a:hover {
  color: var(--foreground);
  background: var(--muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  transition: transform 200ms ease-out, box-shadow 200ms ease-out, border-color 200ms ease-out, background-color 200ms ease-out, filter 200ms ease-out;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(to right, var(--accent), var(--accent-strong));
  color: #FFFFFF;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent-lg);
  filter: brightness(1.08);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--foreground);
  background: transparent;
}

.btn-outline:hover {
  transform: translateY(-2px);
  background: var(--muted);
  border-color: rgba(0, 82, 255, 0.3);
}

/* Hero */
.hero {
  padding: clamp(3rem, 2rem + 5vw, 7rem) 0 var(--section-y);
}

.hero-grid {
  display: grid;
  gap: 3.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 1.6rem + 3.8vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 13ch;
}

.lede {
  margin-top: 1.5rem;
  max-width: 34rem;
  font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  color: var(--muted-foreground);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

/* Services: the company's four areas, an editorial list rather than four identical cards. */
.services {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem 0.5rem;
  scroll-margin-top: 1.5rem;
}

.services-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.2;
}

.service-list {
  margin: 1.25rem 0 0;
}

.service-list div {
  padding: 1.125rem 0;
  border-top: 2px dashed var(--border);
}

.service-list dt {
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.service-list dd {
  margin: 0.25rem 0 0;
  color: var(--muted-foreground);
  line-height: 1.6;
}

/* Receipt: the identity motif. FreeKasir is a cashier app, so it introduces itself as a receipt. */
.receipt {
  position: relative;
  margin: 0 auto;
  width: 100%;
  max-width: 22rem;
  padding: 1.75rem 1.5rem 1.5rem;
  background: var(--card);
  color: var(--foreground);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  filter: drop-shadow(0 20px 25px rgba(15, 23, 42, 0.1)) drop-shadow(0 4px 6px rgba(15, 23, 42, 0.05));
  transform: rotate(-2deg);
  transition: transform 300ms var(--ease);
  font-variant-numeric: tabular-nums;
}

.receipt:hover {
  transform: rotate(0deg) translateY(-4px);
}

/* Torn bottom edge; drop-shadow on the parent follows the zigzag. */
.receipt::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -10px;
  height: 10px;
  background:
    linear-gradient(-45deg, transparent 7px, var(--card) 0) 0 0 / 14px 10px repeat-x,
    linear-gradient(45deg, transparent 7px, var(--card) 0) 0 0 / 14px 10px repeat-x;
}

.receipt-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.receipt-brand {
  font-family: var(--font-display);
  font-size: 1.75rem;
  line-height: 1.2;
}

.receipt-sub {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.perforation {
  border: 0;
  border-top: 2px dashed var(--border);
  margin: 1.25rem 0;
}

.receipt-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.9375rem;
}

.receipt-lines li,
.receipt-total {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.receipt-lines li span:last-child {
  color: var(--muted-foreground);
  white-space: nowrap;
}

.receipt-total {
  font-weight: 700;
  font-size: 1.25rem;
  align-items: baseline;
}

.receipt-total .gradient-text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 2rem;
}

.receipt-note {
  margin-top: 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--muted-foreground);
  text-align: center;
}

/* Product: the one inverted section, holding the company's only product. */
.product {
  background: var(--foreground);
  color: var(--on-dark);
  padding: var(--section-y) 0;
}

.product :focus-visible {
  outline-color: var(--accent-on-dark);
}

.product-grid {
  display: grid;
  gap: 3rem;
}

.kicker {
  color: var(--accent-on-dark);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.product h2 {
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.75rem);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.product-intro p:not(.kicker) {
  color: var(--on-dark-muted);
  max-width: 32rem;
  font-size: 1.0625rem;
}

.product-intro p + p:not(.kicker) {
  margin-top: 1rem;
}

.product-intro .btn {
  margin-top: 2rem;
}

/* Contact */
.contact {
  padding: var(--section-y) 0;
}

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

.contact h2 {
  font-size: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);
  line-height: 1.15;
  max-width: 16ch;
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  padding: 1rem 0;
  border-top: 2px dashed var(--border);
}

.contact-row:last-of-type {
  border-bottom: 2px dashed var(--border);
}

.contact-label {
  min-width: 5rem;
  color: var(--muted-foreground);
}

.contact-value {
  font-weight: 600;
  font-size: 1.0625rem;
}

a.contact-value {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin: -0.625rem 0;
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a.contact-value:hover {
  text-decoration-thickness: 2px;
}

.contact-help {
  margin-top: 1.5rem;
  color: var(--muted-foreground);
  max-width: 30rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--muted-foreground);
}

/* Tablet: wider gutters, header on one row */
@media (min-width: 720px) {
  .container {
    padding: 0 2rem;
  }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    grid-template-areas: "brand nav lang";
    column-gap: 1.5rem;
    min-height: 4.5rem;
    padding-top: 0;
    padding-bottom: 0;
  }

  .site-nav {
    margin-left: 0;
  }
}

/* Desktop: asymmetric grids from the design system */
@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
  }

  .product-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 5rem;
    align-items: center;
  }

  .contact-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }

  .btn-primary:hover,
  .btn-outline:hover,
  .receipt:hover {
    transform: none;
  }

  .receipt:hover {
    transform: rotate(-2deg);
  }
}