/* ============================================================
   FILE: assets/css/main.css
   Base, layout, sections, toast, to-top, reveal, responsive
   ============================================================ */

/* ---------- theme variables ---------- */
:root {
  --kx9-bg: #f4f6fb;
  --kx9-card: #fff;
  --kx9-card-hover: #fbfcff;
  --kx9-ink: #0f172a;
  --kx9-ink-soft: #1e293b;
  --kx9-muted: #5b6473;
  --kx9-line: #e7ebf4;
  --kx9-line-hover: #d8e0ef;
  --kx9-brand: #2563eb;
  --kx9-brand2: #7c3aed;
  --kx9-accent: #06b6d4;
  --kx9-r: 4px;
  --kx9-nav-h: 64px;
  --kx9-shadow: 0 6px 20px rgba(15, 23, 42, .05);
  --kx9-shadow-hover: 0 16px 34px rgba(37, 99, 235, .14);
  --kx9-ease: cubic-bezier(.22, 1, .36, 1);
  --kx9-input-bg: #fbfcff;
  --kx9-icon-bg: linear-gradient(135deg, #eef4ff, #f5f3ff);
  --kx9-tool-ico-1: linear-gradient(135deg, #2563eb, #06b6d4);
  --kx9-tool-ico-2: linear-gradient(135deg, #7c3aed, #ec4899);
  --kx9-tool-ico-3: linear-gradient(135deg, #059669, #10b981);
  --kx9-shimmer: rgba(255, 255, 255, .5);
  --kx9-scrollbar-track: #eef1f8;
  --kx9-scrollbar-thumb: #c3cde0;
  --kx9-scrollbar-thumb-hover: #a9b6d0;
  --kx9-body-grad-1: rgba(37, 99, 235, .06);
  --kx9-body-grad-2: rgba(6, 182, 212, .05);
  --kx9-ad-border: #cbd5e1;
  --kx9-service-img-bg: linear-gradient(135deg, #eef4ff, #f5f3ff);
}

[data-theme="dark"] {
  --kx9-bg: #0a0e1a;
  --kx9-card: #111827;
  --kx9-card-hover: #151d2e;
  --kx9-ink: #e2e8f0;
  --kx9-ink-soft: #cbd5e1;
  --kx9-muted: #8896ab;
  --kx9-line: #1e293b;
  --kx9-line-hover: #2d3a50;
  --kx9-brand: #3b82f6;
  --kx9-brand2: #8b5cf6;
  --kx9-accent: #22d3ee;
  --kx9-shadow: 0 6px 20px rgba(0, 0, 0, .25);
  --kx9-shadow-hover: 0 16px 34px rgba(59, 130, 246, .18);
  --kx9-input-bg: #0f172a;
  --kx9-icon-bg: linear-gradient(135deg, #1a2540, #1e1b4b);
  --kx9-tool-ico-1: linear-gradient(135deg, #3b82f6, #22d3ee);
  --kx9-tool-ico-2: linear-gradient(135deg, #8b5cf6, #ec4899);
  --kx9-tool-ico-3: linear-gradient(135deg, #10b981, #34d399);
  --kx9-shimmer: rgba(255, 255, 255, .08);
  --kx9-scrollbar-track: #111827;
  --kx9-scrollbar-thumb: #2d3a50;
  --kx9-scrollbar-thumb-hover: #3d4f6a;
  --kx9-body-grad-1: rgba(59, 130, 246, .08);
  --kx9-body-grad-2: rgba(34, 211, 238, .06);
  --kx9-ad-border: #2d3a50;
  --kx9-service-img-bg: linear-gradient(135deg, #1a2540, #1e1b4b);
}

/* ---------- reset & base ---------- */
* { box-sizing: border-box }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--kx9-nav-h) + 26px);
}

body {
  margin: 0;
  color: var(--kx9-ink);
  line-height: 1.65;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: clamp(13.5px, .32vw + 12.6px, 16px);
  background:
    radial-gradient(1000px 480px at 88% -10%, var(--kx9-body-grad-1), transparent 60%),
    radial-gradient(800px 420px at 8% 6%, var(--kx9-body-grad-2), transparent 60%),
    var(--kx9-bg);
  background-attachment: fixed;
  transition: background .4s, color .4s;
}

h1, h2, h3 {
  font-family: 'Sora', 'Inter', sans-serif;
  line-height: 1.25;
  color: var(--kx9-ink);
}

h2 {
  font-size: clamp(1.3rem, 1.5vw + .85rem, 2rem);
  margin: 0 0 .5rem;
}

h3 {
  font-size: clamp(1rem, .5vw + .85rem, 1.15rem);
}

p { margin: .35rem 0 }
img { max-width: 100% }

section {
  scroll-margin-top: calc(var(--kx9-nav-h) + 26px);
}

::selection {
  background: var(--kx9-brand);
  color: #fff;
}

/* ---------- scrollbar ---------- */
::-webkit-scrollbar { width: 9px; height: 9px }
::-webkit-scrollbar-track { background: var(--kx9-scrollbar-track) }
::-webkit-scrollbar-thumb {
  background: var(--kx9-scrollbar-thumb);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--kx9-scrollbar-thumb-hover) }

:focus-visible {
  outline: 2px solid var(--kx9-brand);
  outline-offset: 2px;
  border-radius: var(--kx9-r);
}

/* ---------- shared keyframes ---------- */
@keyframes kx9FadeDown {
  from { opacity: 0; transform: translateY(-12px) }
  to { opacity: 1; transform: none }
}
@keyframes kx9NavDrop {
  from { opacity: 0; transform: translateY(-100%) }
  to { opacity: 1; transform: none }
}
@keyframes kx9FadeUp {
  from { opacity: 0; transform: translateY(26px) }
  to { opacity: 1; transform: none }
}
@keyframes kx9GradFlow {
  0% { background-position: 0% 50% }
  100% { background-position: 200% 50% }
}
@keyframes kx9PulseDot {
  0%, 100% { opacity: 1; transform: scale(1) }
  50% { opacity: .45; transform: scale(.8) }
}

/* ---------- layout ---------- */
.kx9-main-container {
  max-width: 1300px;
  margin: 26px auto;
  padding: 0 20px;
  display: flex;
  gap: 26px;
  align-items: flex-start;
}

.kx9-main-container.kx9-centered {
  justify-content: center;
}

.kx9-main-content {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--kx9-card);
  border: 1px solid var(--kx9-line);
  border-radius: var(--kx9-r);
  padding: clamp(18px, 3vw, 34px);
  box-shadow: var(--kx9-shadow);
  transition: border-color .3s, background .4s;
}

.kx9-main-content:hover {
  border-color: var(--kx9-line-hover);
}

.kx9-main-content.kx9-full {
  flex: 1 1 100%;
}

.kx9-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--kx9-brand);
}

.kx9-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: var(--kx9-r);
  background: linear-gradient(90deg, var(--kx9-brand), var(--kx9-accent));
}

/* ---------- hero (always dark) ---------- */
.kx9-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0b1220, #1e293b);
  color: #e2e8f0;
  border: 1px solid #0b1220;
  border-radius: var(--kx9-r);
  padding: clamp(28px, 5vw, 60px);
  display: grid;
  gap: 18px;
}

.kx9-hero::before,
.kx9-hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.kx9-hero::before {
  right: -12%;
  bottom: -70%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(6, 182, 212, .22), transparent 62%);
}

.kx9-hero::after {
  left: -8%;
  top: -60%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(37, 99, 235, .25), transparent 62%);
}

.kx9-hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw + 1rem, 2.9rem);
  color: #fff;
  max-width: 22ch;
}

.kx9-hero h1 span {
  background: linear-gradient(90deg, var(--kx9-accent), #7dd3fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.kx9-hero p {
  max-width: 62ch;
  color: #94a3b8;
  margin: 0;
}

.kx9-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.kx9-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border: none;
  border-radius: var(--kx9-r);
  font: inherit;
  font-weight: 700;
  font-size: .9rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, background-position .4s var(--kx9-ease), border-color .2s;
}

.kx9-btn-primary {
  color: #fff;
  background: linear-gradient(90deg, var(--kx9-brand), var(--kx9-brand2), var(--kx9-brand));
  background-size: 200% 100%;
  box-shadow: 0 10px 22px rgba(37, 99, 235, .35);
}

.kx9-btn-primary:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
}

.kx9-btn-ghost {
  color: #e2e8f0;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .25);
}

.kx9-btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--kx9-accent);
  color: #fff;
}

.kx9-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(96px, 1fr));
  gap: 12px;
  max-width: 460px;
}

.kx9-stat {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: var(--kx9-r);
  padding: 12px 14px;
  transition: transform .25s var(--kx9-ease), border-color .25s;
}

.kx9-stat:hover {
  transform: translateY(-3px);
  border-color: rgba(6, 182, 212, .5);
}

.kx9-stat b {
  display: block;
  font-family: 'Sora';
  font-size: clamp(1.05rem, 1.4vw + .7rem, 1.45rem);
  color: #fff;
}

.kx9-stat span {
  font-size: .68rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: .1em;
}

/* ---------- sidebar / ads ---------- */
.kx9-right-sidebar {
  flex: 0 0 300px;
  position: sticky;
  top: calc(var(--kx9-nav-h) + 20px);
}

.kx9-side-label {
  margin: 0 0 10px;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--kx9-muted);
}

.kx9-ad-box {
  background: var(--kx9-card);
  border: 1px dashed var(--kx9-ad-border);
  border-radius: var(--kx9-r);
  padding: 10px;
  overflow: hidden;
  transition: background .4s, border-color .4s;
}

.kx9-ad-box img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--kx9-r);
  transition: transform .5s var(--kx9-ease);
}

.kx9-ad-box:hover img {
  transform: scale(1.04);
}

/* ---------- services ---------- */
.kx9-service-boxes {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  margin-top: 18px;
}

.kx9-service-box {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  background: var(--kx9-card);
  border: 1px solid var(--kx9-line);
  border-radius: var(--kx9-r);
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform .3s var(--kx9-ease), box-shadow .3s ease, border-color .3s ease, background .4s;
}

.kx9-service-box:hover {
  transform: translateY(-6px);
  border-color: var(--kx9-line-hover);
  box-shadow: var(--kx9-shadow-hover);
}

.kx9-service-box::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -130%;
  width: 55%;
  background: linear-gradient(105deg, transparent, var(--kx9-shimmer), transparent);
  transform: skewX(-20deg);
  transition: left .7s var(--kx9-ease);
  pointer-events: none;
}

.kx9-service-box:hover::after {
  left: 135%;
}

.kx9-service-box img {
  width: 76px;
  height: 76px;
  object-fit: contain;
  border-radius: var(--kx9-r);
  padding: 14px;
  background: var(--kx9-service-img-bg);
  transition: transform .35s var(--kx9-ease);
}

.kx9-service-box:hover img {
  transform: rotate(-5deg) scale(1.08);
}

.kx9-service-box h3 {
  margin: 6px 0 0;
  color: var(--kx9-ink);
}

.kx9-service-box p {
  margin: 0;
  color: var(--kx9-muted);
  font-size: clamp(.82rem, .4vw + .72rem, .95rem);
}

.kx9-drive-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  background: linear-gradient(90deg, var(--kx9-brand), #4f46e5, var(--kx9-brand));
  background-size: 200% 100%;
  color: #fff;
  font-size: .83rem;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--kx9-r);
  transition: background-position .4s var(--kx9-ease), transform .2s, box-shadow .2s;
}

.kx9-drive-link:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, .3);
}

/* ---------- tools ---------- */
.kx9-tool-boxes {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 18px;
}

.kx9-tool-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--kx9-card);
  border: 1px solid var(--kx9-line);
  border-radius: var(--kx9-r);
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform .3s var(--kx9-ease), box-shadow .3s, border-color .3s, background .4s;
}

.kx9-tool-box:hover {
  transform: translateY(-6px);
  border-color: var(--kx9-line-hover);
  box-shadow: var(--kx9-shadow-hover);
}

.kx9-tool-ico {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: var(--kx9-r);
  color: #fff;
  font-size: 22px;
  transition: transform .3s var(--kx9-ease);
}

.kx9-tool-box:hover .kx9-tool-ico {
  transform: rotate(-6deg) scale(1.08);
}

.kx9-tool-box:nth-child(1) .kx9-tool-ico { background: var(--kx9-tool-ico-1) }
.kx9-tool-box:nth-child(2) .kx9-tool-ico { background: var(--kx9-tool-ico-2) }
.kx9-tool-box:nth-child(3) .kx9-tool-ico { background: var(--kx9-tool-ico-3) }

.kx9-tool-box p {
  color: var(--kx9-muted);
  font-size: clamp(.82rem, .4vw + .72rem, .95rem);
  margin: 0;
}

.kx9-mini-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: auto;
  color: var(--kx9-brand);
  font-weight: 700;
  font-size: .84rem;
  text-decoration: none;
}

.kx9-mini-link i {
  transition: transform .25s var(--kx9-ease);
}

.kx9-mini-link:hover i {
  transform: translateX(4px);
}

/* ---------- blog ---------- */
.kx9-blog-boxes {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin-top: 18px;
}

.kx9-blog-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--kx9-card);
  border: 1px solid var(--kx9-line);
  border-radius: var(--kx9-r);
  transition: transform .3s var(--kx9-ease), box-shadow .3s, border-color .3s, background .4s;
}

.kx9-blog-card:hover {
  transform: translateY(-6px);
  border-color: var(--kx9-line-hover);
  box-shadow: var(--kx9-shadow-hover);
}

.kx9-blog-card > img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  transition: transform .5s var(--kx9-ease);
}

.kx9-blog-card:hover > img {
  transform: scale(1.06);
}

.kx9-blog-body {
  display: grid;
  gap: 6px;
  padding: 16px 18px 20px;
  text-align: left;
}

.kx9-blog-meta {
  font-size: .68rem;
  font-weight: 700;
  color: var(--kx9-muted);
  text-transform: uppercase;
  letter-spacing: .12em;
}

.kx9-blog-body h3 {
  margin: 0;
  color: var(--kx9-ink);
}

.kx9-blog-body p {
  color: var(--kx9-muted);
  font-size: clamp(.82rem, .4vw + .72rem, .95rem);
  margin: 0;
}

/* ---------- contact ---------- */
.kx9-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 28px;
  margin-top: 18px;
}

.kx9-cinfo {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.kx9-cinfo + .kx9-cinfo {
  margin-top: 16px;
}

.kx9-cinfo-ico {
  width: 40px;
  height: 40px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--kx9-r);
  background: var(--kx9-icon-bg);
  color: var(--kx9-brand);
  font-size: 15px;
  transition: background .4s;
}

.kx9-cinfo b {
  display: block;
  font-size: .9rem;
  color: var(--kx9-ink);
}

.kx9-cinfo span {
  color: var(--kx9-muted);
  font-size: .85rem;
}

.kx9-form {
  display: grid;
  gap: 14px;
}

.kx9-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.kx9-field label {
  display: block;
  font-size: .76rem;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--kx9-ink);
}

.kx9-field input,
.kx9-field textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--kx9-line);
  border-radius: var(--kx9-r);
  font: inherit;
  color: var(--kx9-ink);
  background: var(--kx9-input-bg);
  transition: border-color .2s, box-shadow .2s, background .4s;
}

.kx9-field input:focus,
.kx9-field textarea:focus {
  outline: none;
  border-color: var(--kx9-brand);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

.kx9-field textarea {
  resize: vertical;
  min-height: 110px;
}

/* ---------- toast ---------- */
#kx9Toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 20px);
  z-index: 1200;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--kx9-card);
  color: var(--kx9-ink);
  padding: 11px 18px;
  border-radius: var(--kx9-r);
  font-size: .85rem;
  font-weight: 600;
  border: 1px solid var(--kx9-line);
  box-shadow: 0 14px 30px rgba(15, 23, 42, .15);
  opacity: 0;
  visibility: hidden;
  transition: .3s var(--kx9-ease);
  max-width: calc(100vw - 32px);
}

[data-theme="dark"] #kx9Toast {
  box-shadow: 0 14px 30px rgba(0, 0, 0, .4);
}

#kx9Toast.kx9-show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

#kx9Toast i {
  color: #22c55e;
}

/* ---------- back to top ---------- */
#kx9ToTop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--kx9-r);
  cursor: pointer;
  background: linear-gradient(135deg, var(--kx9-brand), var(--kx9-brand2));
  color: #fff;
  font-size: 15px;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .3s, visibility .3s, transform .3s var(--kx9-ease);
}

#kx9ToTop.kx9-show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

#kx9ToTop:hover {
  transform: translateY(-3px);
}

/* ---------- scroll reveal ---------- */
.kx9-js .kx9-reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s var(--kx9-ease), transform .7s var(--kx9-ease);
}

.kx9-js .kx9-reveal.kx9-in {
  opacity: 1;
  transform: none;
}

.kx9-js .kx9-reveal:not(.kx9-in) .kx9-service-box,
.kx9-js .kx9-reveal:not(.kx9-in) .kx9-tool-box,
.kx9-js .kx9-reveal:not(.kx9-in) .kx9-blog-card {
  opacity: 0;
}

.kx9-js .kx9-reveal.kx9-in .kx9-service-box,
.kx9-js .kx9-reveal.kx9-in .kx9-tool-box,
.kx9-js .kx9-reveal.kx9-in .kx9-blog-card {
  animation: kx9FadeUp .55s var(--kx9-ease) backwards;
  animation-delay: calc(var(--kx9-i, 0) * 90ms);
}

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .kx9-right-sidebar { flex-basis: 260px }
}

@media (max-width: 900px) {
  .kx9-main-container {
    flex-direction: column;
    gap: 18px;
    margin: 16px auto;
  }
  .kx9-right-sidebar {
    position: static;
    flex: 1 1 auto;
    width: 100%;
  }
  .kx9-ad-box {
    max-width: 340px;
    margin: 0 auto;
  }
  .kx9-contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .kx9-main-container { padding: 0 12px }
  .kx9-form-row { grid-template-columns: 1fr }
  .kx9-service-boxes {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
  }
  .kx9-service-box img {
    width: 60px;
    height: 60px;
    padding: 10px;
  }
  #kx9ToTop {
    right: 14px;
    bottom: 14px;
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 400px) {
  body { font-size: 13px }
  .kx9-service-boxes,
  .kx9-tool-boxes,
  .kx9-blog-boxes { grid-template-columns: 1fr }
  .kx9-stats { grid-template-columns: 1fr 1fr }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .kx9-js .kx9-reveal,
  .kx9-js .kx9-reveal:not(.kx9-in) .kx9-service-box,
  .kx9-js .kx9-reveal:not(.kx9-in) .kx9-tool-box,
  .kx9-js .kx9-reveal:not(.kx9-in) .kx9-blog-card {
    opacity: 1;
    transform: none;
  }
  html { scroll-behavior: auto }
}