/* ============================================================
   NKNsolutions — style.css
   Modern glassmorphism · mobile-first · blue accent
   ============================================================ */

:root {
  --blue: #2E6BFF;
  --blue-dark: #1E4FD6;
  --blue-soft: #EAF0FF;
  --blue-glow: rgba(46, 107, 255, 0.35);
  --ink: #0F172A;
  --ink-soft: #475569;
  --ink-mute: #94A3B8;
  --bg: #F3F5FA;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-strong: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.65);
  --shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
  --shadow-lift: 0 18px 48px rgba(15, 23, 42, 0.14);
  --radius: 20px;
  --font-head: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

.container { width: min(1140px, 92%); margin-inline: auto; }
.container.narrow { max-width: 720px; }

/* ---------- Ambient background orbs ---------- */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  z-index: -1;
  pointer-events: none;
  animation: orbFloat 18s ease-in-out infinite alternate;
}
.orb-1 { width: 480px; height: 480px; top: -160px; right: -120px; background: radial-gradient(circle, #7DA7FF, transparent 70%); }
.orb-2 { width: 420px; height: 420px; top: 45%; left: -180px; background: radial-gradient(circle, #C7D6FF, transparent 70%); animation-delay: -6s; }
.orb-3 { width: 380px; height: 380px; bottom: -140px; right: 12%; background: radial-gradient(circle, #A5C0FF, transparent 70%); animation-delay: -12s; }

@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, -30px) scale(1.08); }
}

/* ---------- Glass primitives ---------- */
.glass, .glass-card, .glass-chip {
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.glass-card { border-radius: var(--radius); padding: 32px; transition: transform 0.35s ease, box-shadow 0.35s ease; }
.glass-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }

.glass-chip { border-radius: 999px; padding: 8px 18px; font-size: 0.85rem; font-weight: 500; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff;
  box-shadow: 0 8px 24px var(--blue-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px var(--blue-glow); }
.btn-ghost {
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  color: var(--ink);
}
.btn-ghost:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-sm { padding: 10px 22px; font-size: 0.88rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: wait; transform: none; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 300;
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow); }

.header-inner { display: flex; align-items: center; gap: 20px; height: 72px; }

.lang-toggle {
  display: flex;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--glass-border);
  padding: 3px;
  flex-shrink: 0;
}
.lang-btn {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  transition: background 0.25s ease, color 0.25s ease;
}
.lang-btn.active { background: linear-gradient(135deg, var(--blue), var(--blue-dark)); color: #fff; }

.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand-mark { height: 32px; width: auto; }
.brand-name { font-family: var(--font-head); font-size: 1.15rem; font-weight: 500; letter-spacing: -0.02em; }
.brand-name strong { color: var(--blue); font-weight: 700; }

.site-nav { display: flex; align-items: center; gap: 26px; }
.nav-link { font-size: 0.92rem; font-weight: 500; color: var(--ink-soft); position: relative; transition: color 0.25s ease; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 46px;   /* comfortable 46px touch target (Apple recommends ≥44px) */
  height: 46px;
  border-radius: 12px;
  -webkit-tap-highlight-color: transparent;
}
.nav-burger:active { background: rgba(46, 107, 255, 0.1); }
.nav-burger span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Sections ---------- */
main section { scroll-margin-top: 90px; }
.section { padding: 110px 0; }

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 14px auto 56px;
}

/* ---------- Hero ---------- */
.hero { padding: 190px 0 120px; text-align: center; }
.hero-badge { display: inline-block; color: var(--blue-dark); margin-bottom: 26px; }
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.12;
  max-width: 820px;
  margin-inline: auto;
}
.hero-sub { color: var(--ink-soft); font-size: 1.08rem; max-width: 640px; margin: 26px auto 40px; }
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 64px; }
.stat { display: flex; align-items: center; gap: 10px; padding: 12px 22px; }
.stat strong { font-family: var(--font-head); color: var(--blue); font-size: 1.1rem; }
.stat span { color: var(--ink-soft); font-size: 0.85rem; }

/* ---------- Service cards ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.glass-card h3 { font-family: var(--font-head); font-size: 1.25rem; margin: 20px 0 10px; }
.glass-card p { color: var(--ink-soft); font-size: 0.95rem; }
.glass-card.featured { border: 1px solid rgba(46, 107, 255, 0.35); box-shadow: 0 8px 40px var(--blue-glow); }

.card-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: var(--blue-soft);
  color: var(--blue);
}
.card-icon svg { width: 26px; height: 26px; }

.card-list { list-style: none; margin-top: 18px; }
.card-list li {
  padding-left: 26px;
  position: relative;
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.card-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}

/* ---------- Why strip ---------- */
.why-strip { border-radius: var(--radius); padding: 44px; margin-top: 64px; }
.why-title { font-family: var(--font-head); font-size: 1.4rem; text-align: center; margin-bottom: 32px; }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.why-item { display: flex; flex-direction: column; gap: 6px; text-align: center; }
.why-item strong { font-family: var(--font-head); color: var(--blue-dark); }
.why-item span { color: var(--ink-soft); font-size: 0.9rem; }

/* ---------- Reviews ---------- */
.reviews-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: start; }
.reviews-list { display: grid; gap: 18px; }

.review-card {
  border-radius: var(--radius);
  padding: 24px 28px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  animation: fadeUp 0.5s ease both;
}
.review-card .review-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 10px; flex-wrap: wrap; }
.review-card .review-name { font-weight: 600; font-size: 0.95rem; }
.review-card .review-stars { color: #F5A623; letter-spacing: 2px; font-size: 0.9rem; }
.review-card .review-text { color: var(--ink-soft); font-size: 0.92rem; }

.review-form h3 { font-family: var(--font-head); font-size: 1.2rem; margin-bottom: 20px; }

.stars { display: flex; gap: 6px; }
.star { font-size: 1.6rem; color: #CBD5E1; transition: color 0.2s ease, transform 0.2s ease; padding: 2px; }
.star:hover { transform: scale(1.15); }
.star.active { color: #F5A623; }

/* ---------- Forms ---------- */
.field { margin-bottom: 16px; position: relative; }
.field-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--ink-soft); margin-bottom: 8px; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.65);
  font: inherit;
  color: var(--ink);
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(46, 107, 255, 0.15);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-mute); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-status { margin-top: 14px; font-size: 0.9rem; min-height: 1.4em; }
.form-status.ok { color: #16A34A; }
.form-status.err { color: #DC2626; }

.code-status { display: block; font-size: 0.8rem; margin-top: 6px; min-height: 1.2em; }
.code-status.ok { color: #16A34A; }
.code-status.err { color: #DC2626; }

/* Honeypot: visually hidden anti-spam field */
.hp-field { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; }

/* ---------- Account ---------- */
.account-card { max-width: 480px; margin-inline: auto; }
.tabs { display: flex; gap: 8px; margin-bottom: 24px; background: rgba(255,255,255,0.5); border-radius: 999px; padding: 4px; }
.tab { flex: 1; padding: 10px; border-radius: 999px; font-weight: 600; font-size: 0.9rem; color: var(--ink-soft); transition: background 0.25s ease, color 0.25s ease; }
.tab.active { background: linear-gradient(135deg, var(--blue), var(--blue-dark)); color: #fff; box-shadow: 0 4px 14px var(--blue-glow); }
.account-logged { text-align: center; display: grid; gap: 18px; justify-items: center; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 40px;
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--glass-border);
}
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding: 56px 0 32px; }
.footer-brand p { color: var(--ink-soft); font-size: 0.9rem; margin-top: 10px; max-width: 280px; }
.footer-logo { height: 90px; width: auto; margin-bottom: 14px; }
.footer-col { display: grid; gap: 10px; align-content: start; }
.footer-col h4 { font-family: var(--font-head); font-size: 0.95rem; margin-bottom: 4px; }
.footer-col a { color: var(--ink-soft); font-size: 0.9rem; transition: color 0.25s ease; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid rgba(15, 23, 42, 0.06); padding: 18px 0; }
.footer-bottom p { color: var(--ink-mute); font-size: 0.82rem; text-align: center; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.cards-grid .reveal:nth-child(2), .form-row .reveal:nth-child(2) { transition-delay: 0.12s; }
.cards-grid .reveal:nth-child(3) { transition-delay: 0.24s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-burger { display: flex; }
  .site-nav {
    position: fixed;
    top: 72px; right: 0;
    width: min(300px, 80vw);
    height: calc(100vh - 72px);
    height: calc(100dvh - 72px); /* correct height under mobile browser bars */
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
    gap: 22px;
    background: var(--glass-strong);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    backdrop-filter: blur(24px) saturate(160%);
    border-left: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lift);
    transform: translateX(100%);
    transition: transform 0.35s ease;
  }
  .site-nav.open { transform: none; }
  .cards-grid, .why-grid { grid-template-columns: 1fr; }
  .reviews-layout { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .hero { padding: 150px 0 90px; }
  .form-row { grid-template-columns: 1fr; }
  .glass-card { padding: 24px; }
  .why-strip { padding: 30px 22px; }
  .brand-name { display: none; } /* keep header compact on small phones */
}

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