/* =====================================================================
   NETTRIX PRIME  |  style.css
   Sections: 1 Tokens · 2 Base · 3 Header · 4 Layout · 5 Visual
             6 Service nav · 7 Content panels · 8 FAQ · 9 Brand/Footer
             10 Toast · 11 Tablet · 12 Desktop · 13 Large screens · 14 Motion
   Mobile-first: base styles target phones, media queries add width.
   ===================================================================== */

/* 1. TOKENS ---------------------------------------------------------- */
:root {
  --primary: #195293;
  --secondary: #3A7BFF;
  --dark: #101828;
  --light: #F5F8FC;
  --white: #FFFFFF;
  --border: #DCE5F0;
  --text: #1D2939;
  --muted: #667085;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --shadow-soft: 0 6px 24px rgba(16, 24, 40, 0.06);
  --shadow-lift: 0 12px 32px rgba(25, 82, 147, 0.14);

  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 2. BASE ------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; }

:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 1.25em; height: 1.25em; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.75;
  stroke-linecap: round; stroke-linejoin: round;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  padding: 10px 16px; background: var(--dark); color: var(--white);
  border-radius: var(--radius-s); text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* 3. HEADER ---------------------------------------------------------- */
.site-header {
  text-align: center;
  padding: 28px 16px 22px;
  border-bottom: 1px solid var(--border);
}
.site-header__menu {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--muted);
}
.site-header__brand {
  margin-top: 4px;
  font-size: clamp(1.5rem, 5.5vw, 2.25rem);
  font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--primary); line-height: 1.15;
}

/* 4. LAYOUT (mobile: stacked) --------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 1600px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}
.layout > * { min-width: 0; }

/* 5. VISUAL AREA ----------------------------------------------------- */
.visual {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px 16px 22px;
  text-align: center; overflow: hidden;
  background: linear-gradient(160deg, #0d2c52 0%, var(--primary) 55%, var(--secondary) 130%);
  color: var(--white);
}
.visual__art {
  display: block; width: 100%; height: auto;
  max-width: 420px; max-height: 300px; object-fit: contain;
}
.visual__caption {
  margin-top: 8px;
  font-size: clamp(1rem, 4.4vw, 1.25rem); font-weight: 600; line-height: 1.35;
}

/* 6. SERVICE NAV (mobile: horizontal scroll bar) -------------------- */
.service-nav {
  position: sticky; top: 0; z-index: 20;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.service-nav__list {
  display: flex; gap: 4px;
  overflow-x: auto; overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0 12px;
}
.service-nav__list::-webkit-scrollbar { display: none; }
.service-nav__list > li { flex: none; scroll-snap-align: center; }

.service-nav__item {
  display: block; position: relative;
  padding: 16px 14px;
  background: none; border: 0;
  font-size: 0.9375rem; font-weight: 500; color: var(--muted);
  white-space: nowrap;
  transition: color 0.25s var(--ease);
}
.service-nav__item .icon { display: none; }

/* active underline (horizontal) */
.service-nav__item::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 0;
  height: 3px; border-radius: 3px 3px 0 0;
  background: var(--primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.service-nav__item:hover { color: var(--primary); }
.service-nav__item.is-active { color: var(--primary); font-weight: 700; }
.service-nav__item.is-active::after { transform: scaleX(1); }

/* 7. CONTENT PANELS -------------------------------------------------- */
.content { padding: 32px 20px 44px; background: var(--white); }

.panel[hidden] { display: none; }
.panel:focus { outline: none; }
.panel:focus-visible { outline: 3px solid var(--secondary); outline-offset: 6px; border-radius: var(--radius-s); }
.panel.is-entering { animation: panel-in 0.45s var(--ease); }

.panel__icon {
  width: 52px; height: 52px; border-radius: var(--radius-m);
  display: grid; place-items: center;
  background: var(--light); color: var(--primary);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.panel__icon .icon { width: 26px; height: 26px; }

.panel__title {
  font-size: clamp(1.375rem, 5.2vw, 1.875rem);
  font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase;
  line-height: 1.2; color: var(--dark);
  overflow-wrap: anywhere;
}
.panel__tagline {
  margin-top: 8px;
  font-size: clamp(1.0625rem, 3.6vw, 1.25rem);
  font-weight: 600; color: var(--primary); line-height: 1.4;
}
.panel__lead {
  margin-top: 14px; max-width: 62ch;
  color: var(--muted);
}
.panel__subhead {
  margin-top: 28px; margin-bottom: 4px;
  font-size: 1rem; font-weight: 700; color: var(--dark);
}

/* Prime overview cards */
.cards { display: grid; gap: 14px; margin-top: 28px; grid-template-columns: minmax(0, 1fr); }
.card {
  padding: 20px; border: 1px solid var(--border); border-radius: var(--radius-m);
  background: var(--white);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--secondary); }
.card__icon { width: 28px; height: 28px; color: var(--secondary); }
.card h3 { margin-top: 12px; font-size: 1.0625rem; font-weight: 700; color: var(--dark); }
.card p { margin-top: 4px; font-size: 0.9375rem; color: var(--muted); }

.link-btn {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px; padding: 6px 0; min-height: 44px;
  background: none; border: 0;
  font-weight: 700; font-size: 0.9375rem; color: var(--primary);
}
.link-btn .icon { width: 1em; height: 1em; transition: transform 0.25s var(--ease); }
.link-btn:hover .icon { transform: translateX(4px); }

/* Feature list */
.features { margin-top: 22px; display: grid; gap: 10px; }
.features li { display: flex; gap: 10px; align-items: flex-start; }
.features .icon {
  width: 22px; height: 22px; padding: 4px; margin-top: 1px;
  border-radius: 50%; background: var(--light); color: var(--primary);
  stroke-width: 2.5;
}
.features + .btn { margin-top: 30px; }

/* Plans */
.plans { display: grid; gap: 12px; margin-top: 24px; grid-template-columns: minmax(0, 1fr); }
.plan {
  padding: 18px; border: 1px solid var(--border); border-radius: var(--radius-m);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.plan:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }
.plan h3 { font-size: 1.0625rem; font-weight: 700; color: var(--dark); }
.plan p { margin-top: 4px; font-size: 0.9375rem; color: var(--muted); }
.plan--featured { border-color: var(--primary); background: var(--light); box-shadow: inset 0 0 0 1px var(--primary); }

/* Numbered steps (a real sequence) */
.steps { margin-top: 24px; counter-reset: step; display: grid; gap: 14px; }
.steps li {
  counter-increment: step;
  position: relative; padding-left: 46px; min-height: 32px; padding-top: 3px;
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--border); background: var(--light);
  color: var(--primary); font-weight: 700; font-size: 0.875rem;
}
.steps + .btn { margin-top: 30px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 26px;
  border-radius: 999px; border: 1.5px solid transparent;
  font-weight: 700; font-size: 0.9375rem; text-align: center;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.btn:active { transform: scale(0.98); }
.btn--primary { background: var(--primary); color: var(--white); }
.btn--primary:hover { background: var(--secondary); transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.btn--outline { background: var(--white); color: var(--primary); border-color: var(--primary); }
.btn--outline:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-lift); }

/* 8. FAQ ------------------------------------------------------------- */
.faq { background: var(--light); padding: 56px 20px; border-bottom: 1px solid var(--border); }
.faq__inner { max-width: 820px; margin: 0 auto; }
.faq__head { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.faq__icon { width: 28px; height: 28px; color: var(--primary); }
.faq__head h2 { font-size: clamp(1.375rem, 5vw, 1.875rem); font-weight: 800; color: var(--dark); line-height: 1.2; }

.accordion { border-top: 1px solid var(--border); }
.accordion__item { border-bottom: 1px solid var(--border); }
.accordion__item h3 { font-size: inherit; font-weight: inherit; }

.accordion__trigger {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 4px; min-height: 56px;
  background: none; border: 0; text-align: left;
  font-weight: 700; font-size: 1rem; color: var(--dark);
  transition: color 0.2s var(--ease);
}
.accordion__trigger:hover { color: var(--primary); }
.accordion__trigger .icon { color: var(--primary); transition: transform 0.3s var(--ease); }
.accordion__trigger[aria-expanded="true"] { color: var(--primary); }
.accordion__trigger[aria-expanded="true"] .icon { transform: rotate(180deg); }

.accordion__panel {
  display: grid; grid-template-rows: 0fr; visibility: hidden;
  transition: grid-template-rows 0.3s var(--ease), visibility 0s linear 0.3s;
}
.accordion__panel > div { overflow: hidden; }
.accordion__panel p { padding: 0 4px 22px; color: var(--muted); max-width: 66ch; }
.accordion__trigger[aria-expanded="true"] + .accordion__panel { grid-template-rows: 1fr; }
.accordion__item.is-open .accordion__panel {
  grid-template-rows: 1fr; visibility: visible;
  transition: grid-template-rows 0.3s var(--ease), visibility 0s;
}

/* 9. BRAND AREA + FOOTER -------------------------------------------- */
.brand { text-align: center; padding: 64px 20px; background: var(--white); }
.brand__rule {
  width: min(280px, 60%); height: 1px; margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--secondary) 50%, var(--border) 80%, transparent);
}
.brand__name {
  margin-top: 28px;
  font-size: clamp(1.75rem, 8vw, 3rem);
  font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--primary); line-height: 1.15;
}
.brand__tagline { margin: 10px 0 28px; color: var(--muted); font-size: clamp(0.9375rem, 3.6vw, 1.125rem); }

.site-footer { padding: 22px 16px; text-align: center; background: var(--dark); color: #98a2b3; font-size: 0.875rem; }

/* 10. TOAST ---------------------------------------------------------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 50;
  max-width: calc(100vw - 32px);
  padding: 12px 20px; border-radius: var(--radius-m);
  background: var(--dark); color: var(--white); font-size: 0.9375rem; font-weight: 500;
  box-shadow: 0 12px 32px rgba(16, 24, 40, 0.3);
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* Very small phones (320px) */
@media (max-width: 359px) {
  .content { padding: 28px 16px 40px; }
  .faq { padding: 44px 16px; }
  .btn { width: 100%; }
}

/* Larger phones */
@media (min-width: 480px) {
  .content { padding: 36px 28px 48px; }
  .faq { padding: 64px 28px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plans { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* 11. TABLET (768px+): banner on top, menu left, content right ------ */
@media (min-width: 768px) {
  .site-header { padding: 36px 24px 28px; }

  .layout { grid-template-columns: 230px minmax(0, 1fr); }

  .visual { grid-column: 1 / -1; padding: 28px 24px 24px; border-bottom: 1px solid var(--border); }
  .visual__art { max-width: 460px; max-height: 340px; }
  .visual__caption { font-size: 1.375rem; }

  .service-nav {
    position: static; border-bottom: 0; border-right: 1px solid var(--border);
    background: var(--white);
  }
  .service-nav__list {
    display: block; overflow: visible; padding: 20px 0; scroll-snap-type: none;
  }
  .service-nav__list > li { display: block; }
  .service-nav__item {
    display: flex; align-items: center; gap: 12px;
    width: 100%; padding: 15px 20px 15px 24px;
    white-space: normal; text-align: left; line-height: 1.35;
    border-left: 3px solid transparent;
    transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), padding-left 0.25s var(--ease);
  }
  .service-nav__item .icon { display: block; }
  .service-nav__item::after { display: none; }
  .service-nav__item:hover { background: var(--light); padding-left: 28px; }
  .service-nav__item.is-active { background: var(--light); border-left-color: var(--primary); }

  .content { padding: 44px 40px 56px; }
  .faq { padding: 80px 40px; }
}

/* 12. DESKTOP (1024px+): visual 30% | menu 20% | content 50% -------- */
@media (min-width: 1024px) {
  .layout { grid-template-columns: 3fr 2fr 5fr; }

  .visual {
    grid-column: auto; min-height: 640px;
    padding: 32px 24px; border-bottom: 0;
  }
  .visual__art { max-width: 100%; max-height: 520px; }
  .visual__caption { margin-top: 16px; font-size: 1.375rem; }

  .service-nav { border-left: 1px solid var(--border); }
  .service-nav__list { padding: 36px 0; position: sticky; top: 0; }
  .service-nav__item { padding: 16px 16px 16px 22px; font-size: 0.9375rem; }

  .content { padding: 56px 48px 64px; }
  .cards { gap: 18px; }
}

/* 13. LARGE SCREENS -------------------------------------------------- */
@media (min-width: 1280px) {
  .service-nav__item { padding-left: 28px; font-size: 1rem; }
  .content { padding: 64px 64px 72px; }
  .visual { min-height: 700px; }
}
@media (min-width: 1920px) {
  html { font-size: 106.25%; }
}

/* 14. MOTION --------------------------------------------------------- */
@keyframes panel-in {
  from { opacity: 0; transform: translateX(14px); }
  to   { opacity: 1; transform: translateX(0); }
}

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

/*----header---*/
.site-header{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 40px;
  background:#fff;
  border-bottom:1px solid #e5e5e5;
  box-sizing:border-box;
}

.site-header__logo{
  font-size:24px;
  font-weight:800;
  color:#111;
  white-space:nowrap;
}

.site-header__nav{
  display:flex;
  align-items:center;
  gap:24px;
}

.site-header__nav a{
  color:#222;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
}

.site-header__nav a:hover{
  color:#146eb4;
}

@media(max-width:1000px){
  .site-header{
    padding:16px 20px;
  }

  .site-header__nav{
    gap:14px;
    overflow-x:auto;
  }

  .site-header__nav a{
    font-size:13px;
  }
}