/* Perkan Solutions — product site framework (LMS / EMS) */
:root, [data-theme="dark"] {
  --bg: #0d0e10;
  --bg-2: #141519;
  --card: #1a1c21;
  --card-2: #202329;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f6f8;
  --text-2: #c4c8d0;
  --muted: #9aa0ab;
  --brand: #3b82f6;
  --brand-2: #2563eb;
  --brand-deep: #1d4ed8;
  --gold: #f5c542;
  --gold-2: #eab308;
  --nav-bg: rgba(7, 8, 10, 0.82);
  --nav-bg-scrolled: rgba(5, 5, 7, 0.93);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.55), 0 6px 16px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.4);
  --ring: rgba(59, 130, 246, 0.45);
  --grad: linear-gradient(135deg, var(--brand) 0%, var(--gold) 130%);
  --grad-text: linear-gradient(100deg, #60a5fa 0%, #f5c542 100%);
  --nav-h: 76px;
}
[data-theme="light"] {
  --bg: #ffffff;
  --bg-2: #f4f6f9;
  --card: #ffffff;
  --card-2: #f7f9fc;
  --border: #e6e8ec;
  --border-strong: #d6dae1;
  --text: #12151b;
  --text-2: #3c4250;
  --muted: #5d6573;
  --brand: #2563eb;
  --brand-2: #1d4ed8;
  --brand-deep: #1e3a8a;
  --gold: #c98a00;
  --gold-2: #b07d00;
  --nav-bg: rgba(247, 248, 250, 0.86);
  --nav-bg-scrolled: rgba(240, 242, 246, 0.95);
  --shadow: 0 18px 44px rgba(20, 30, 60, 0.12), 0 6px 16px rgba(20, 30, 60, 0.08);
  --shadow-sm: 0 4px 14px rgba(20, 30, 60, 0.08);
  --ring: rgba(37, 99, 235, 0.4);
  --grad-text: linear-gradient(100deg, #2563eb 0%, #c98a00 100%);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(680px 420px at 78% -8%, rgba(59, 130, 246, 0.16), transparent 60%),
    radial-gradient(620px 420px at 8% 8%, rgba(245, 197, 66, 0.10), transparent 55%);
  pointer-events: none;
}
[data-theme="light"] body::before { opacity: 0.7; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }
section { padding: 6rem 0; position: relative; }

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.02em; font-weight: 800; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.9rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); }
h3 { font-size: 1.2rem; font-weight: 700; }
p { color: var(--text-2); }
.grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.muted { color: var(--muted); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.5rem; border-radius: 12px; font-weight: 650;
  font-size: 0.97rem; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.2s;
  white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 26px rgba(37, 99, 235, 0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(37, 99, 235, 0.45); }
.btn-outline { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn-block { width: 100%; justify-content: center; }
.btn-lg { padding: 1rem 1.8rem; font-size: 1.02rem; }

/* Navbar */
.navbar {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 1000;
  display: flex; align-items: center;
  background: var(--nav-bg); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.navbar.scrolled { background: var(--nav-bg-scrolled); box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 800; font-size: 1.12rem; letter-spacing: -0.02em; }
.brand .logo-img { height: 30px; width: auto; }
[data-theme="dark"] .brand .logo-img { filter: brightness(0) invert(1); }
.brand .pill { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 0.18rem 0.5rem; border-radius: 999px; background: var(--grad); color: #fff; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a.link { color: var(--text-2); font-weight: 550; font-size: 0.95rem; position: relative; }
.nav-links a.link:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 0.6rem; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  background: var(--card); border: 1px solid var(--border); color: var(--text); cursor: pointer;
  font-size: 0.8rem; font-weight: 700; transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.icon-btn:hover { border-color: var(--brand); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px;
  align-items: center; justify-content: center; background: var(--card); border: 1px solid var(--border); border-radius: 10px; cursor: pointer; }
.nav-toggle span { width: 20px; height: 2px; background: var(--text); transition: 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero { padding-top: calc(var(--nav-h) + 4.5rem); padding-bottom: 4rem; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 3.5rem; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; font-weight: 650;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-2);
  padding: 0.4rem 0.85rem; border: 1px solid var(--border-strong); border-radius: 999px; margin-bottom: 1.4rem;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gold-2); box-shadow: 0 0 0 4px rgba(245, 197, 66, 0.18); }
.hero p.lead { font-size: 1.15rem; margin: 1.4rem 0 2rem; max-width: 36ch; }
.hero-cta { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 1.8rem; margin-top: 2.2rem; flex-wrap: wrap; }
.hero-meta div { display: flex; flex-direction: column; }
.hero-meta b { font-size: 1.5rem; font-weight: 800; }
.hero-meta span { font-size: 0.82rem; color: var(--muted); }

/* Generic section header */
.sec-head { max-width: 640px; margin: 0 auto 3.2rem; text-align: center; }
.sec-head .eyebrow { margin-bottom: 1rem; }
.sec-head p { margin-top: 0.9rem; font-size: 1.05rem; }

/* Cards / features */
.grid { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 1.9rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 1.5rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(245, 197, 66, 0.16));
  border: 1px solid var(--border); margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: 0.5rem; }
.card p { font-size: 0.96rem; }

/* Steps */
.steps { counter-reset: step; }
.step { display: flex; gap: 1.2rem; align-items: flex-start; }
.step .num {
  flex: none; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  font-weight: 800; background: var(--grad); color: #fff;
}

/* Product mockup (dashboard / event) */
.mock {
  background: var(--card); border: 1px solid var(--border-strong); border-radius: 18px;
  box-shadow: var(--shadow); overflow: hidden;
}
.mock-bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.8rem 1rem; border-bottom: 1px solid var(--border); background: var(--card-2); }
.mock-bar i { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.mock-bar i:nth-child(1) { background: #ff5f57; }
.mock-bar i:nth-child(2) { background: #febc2e; }
.mock-bar i:nth-child(3) { background: #28c840; }
.mock-bar .url { margin-left: 0.8rem; font-size: 0.72rem; color: var(--muted); }
.mock-body { padding: 1.2rem; display: grid; gap: 0.85rem; }
.mock-row { display: flex; align-items: center; gap: 0.85rem; padding: 0.8rem; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-2); }
.mock-row .thumb { flex: none; width: 44px; height: 44px; border-radius: 10px; background: var(--grad); display: grid; place-items: center; color: #fff; font-weight: 700; }
.mock-row .meta { flex: 1; min-width: 0; }
.mock-row .meta b { display: block; font-size: 0.92rem; }
.mock-row .meta span { font-size: 0.78rem; color: var(--muted); }
.bar { height: 7px; border-radius: 999px; background: var(--border); overflow: hidden; margin-top: 0.4rem; }
.bar > i { display: block; height: 100%; background: var(--grad); border-radius: 999px; }
.chip { font-size: 0.72rem; font-weight: 650; padding: 0.25rem 0.6rem; border-radius: 999px; background: rgba(59,130,246,0.16); color: var(--brand); border: 1px solid var(--border); }
.chip.gold { background: rgba(245,197,66,0.18); color: var(--gold-2); }
.mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; }
.mock-stat { padding: 0.9rem; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-2); }
.mock-stat b { font-size: 1.3rem; display: block; }
.mock-stat span { font-size: 0.72rem; color: var(--muted); }

/* Stats band */
.stats { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stats .grid-4 { text-align: center; }
.stat b { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; display: block; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--muted); font-size: 0.92rem; }

/* Pricing */
.price-card { display: flex; flex-direction: column; }
.price-card.feat { border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand), var(--shadow); position: relative; }
.price-card.feat::before { content: attr(data-badge); position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; font-size: 0.7rem; font-weight: 700; padding: 0.25rem 0.8rem; border-radius: 999px; letter-spacing: 0.04em; }
.price { font-size: 2.4rem; font-weight: 800; margin: 0.6rem 0; }
.price small { font-size: 0.9rem; font-weight: 500; color: var(--muted); }
.price-card ul { list-style: none; display: grid; gap: 0.7rem; margin: 1.2rem 0 1.6rem; }
.price-card li { font-size: 0.92rem; color: var(--text-2); display: flex; gap: 0.55rem; align-items: flex-start; }
.price-card li::before { content: "\2713"; color: var(--brand); font-weight: 800; }
.price-card .btn { margin-top: auto; }

/* CTA */
.cta-band { text-align: center; }
.cta-inner { background: var(--card); border: 1px solid var(--border-strong); border-radius: 24px; padding: 3.5rem 2rem;
  position: relative; overflow: hidden; }
.cta-inner::before { content: ""; position: absolute; inset: 0; background: var(--grad); opacity: 0.08; }
.cta-inner > * { position: relative; }
.cta-inner h2 { margin-bottom: 0.8rem; }
.cta-inner .hero-cta { justify-content: center; margin-top: 1.6rem; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 3rem 0 2rem; background: var(--bg-2); }
.footer-grid { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; align-items: center; }
.footer .muted { font-size: 0.88rem; }
.footer a.link { color: var(--text-2); font-size: 0.9rem; }
.footer a.link:hover { color: var(--brand); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Mobile */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; gap: 1.5rem;
    background: var(--nav-bg-scrolled); backdrop-filter: blur(16px); padding: 2rem; align-items: flex-start;
    transform: translateY(-130%); transition: transform 0.35s ease; border-bottom: 1px solid var(--border);
  }
  .nav-links.open { transform: none; }
  .nav-toggle { display: flex; }
  .nav-links .btn { width: 100%; justify-content: center; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  section { padding: 4.2rem 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 4px; }
::selection { background: rgba(59, 130, 246, 0.3); }

.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .ic-sun { display: none; }
.theme-toggle .ic-moon { display: block; }
[data-theme="light"] .theme-toggle .ic-sun { display: block; }
[data-theme="light"] .theme-toggle .ic-moon { display: none; }
.lang-toggle { font-size: 0.78rem; letter-spacing: 0.03em; }

/* Screenshot gallery */
.screenshots { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.shot-gallery { display: grid; gap: 1.6rem; }
.shot-tabs {
  display: flex; gap: 0.55rem; flex-wrap: wrap; justify-content: center;
  padding: 0.35rem; border-radius: 14px; background: var(--card); border: 1px solid var(--border);
}
.shot-tab {
  padding: 0.65rem 1.1rem; border-radius: 10px; border: 1px solid transparent;
  background: transparent; color: var(--text-2); font: inherit; font-size: 0.88rem; font-weight: 600;
  cursor: pointer; transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}
.shot-tab:hover { color: var(--text); background: var(--bg-2); }
.shot-tab.active {
  background: var(--grad); color: #fff; border-color: transparent;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
}
.shot-panels { position: relative; min-height: 420px; }
.shot-panel {
  display: none; animation: shotFade 0.45s ease;
}
.shot-panel.active { display: block; }
@keyframes shotFade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
.shot-caption {
  text-align: center; margin-top: 1.1rem; font-size: 0.95rem; color: var(--muted);
}
.mock-lg { border-radius: 20px; }
.mock-app-body { display: grid; grid-template-columns: 200px 1fr; min-height: 340px; }
.mock-sidebar {
  padding: 1rem 0.85rem; border-right: 1px solid var(--border); background: var(--bg-2);
  display: grid; gap: 0.35rem; align-content: start;
}
.mock-sidebar .nav-item {
  padding: 0.55rem 0.75rem; border-radius: 9px; font-size: 0.78rem; font-weight: 600;
  color: var(--muted); display: flex; align-items: center; gap: 0.5rem;
}
.mock-sidebar .nav-item.active { background: rgba(59, 130, 246, 0.14); color: var(--brand); }
.mock-sidebar .nav-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: 0.5; }
.mock-main { padding: 1.1rem 1.2rem; display: grid; gap: 0.85rem; align-content: start; }
.mock-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.15rem; }
.mock-sub { font-size: 0.74rem; color: var(--muted); }
.mock-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.7rem; }
.mock-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; }
.mock-kpi {
  padding: 0.85rem; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-2);
}
.mock-kpi b { display: block; font-size: 1.15rem; }
.mock-kpi span { font-size: 0.7rem; color: var(--muted); }
.mock-video {
  height: 140px; border-radius: 12px; border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(245,197,66,0.12));
  display: grid; place-items: center; position: relative;
}
.mock-video::after {
  content: ""; width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.92); box-shadow: var(--shadow-sm);
  clip-path: polygon(38% 28%, 38% 72%, 72% 50%);
}
.mock-lesson {
  padding: 0.65rem 0.75rem; border: 1px solid var(--border); border-radius: 10px;
  font-size: 0.76rem; display: flex; justify-content: space-between; align-items: center;
}
.mock-lesson.done { border-color: rgba(59,130,246,0.35); background: rgba(59,130,246,0.08); }
.mock-lesson.current { border-color: var(--brand); background: rgba(59,130,246,0.12); font-weight: 650; }
.mock-q {
  padding: 1rem; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-2);
}
.mock-q p { font-size: 0.84rem; font-weight: 600; color: var(--text); margin-bottom: 0.75rem; }
.mock-opt {
  padding: 0.6rem 0.75rem; border: 1px solid var(--border); border-radius: 9px;
  font-size: 0.76rem; margin-bottom: 0.45rem; display: flex; align-items: center; gap: 0.55rem;
}
.mock-opt.sel { border-color: var(--brand); background: rgba(59,130,246,0.1); }
.mock-opt i {
  width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--border-strong); flex: none;
}
.mock-opt.sel i { border-color: var(--brand); background: var(--brand); box-shadow: inset 0 0 0 2px var(--card); }
.mock-cert {
  padding: 1.4rem; border: 2px dashed var(--gold-2); border-radius: 14px; text-align: center;
  background: linear-gradient(180deg, rgba(245,197,66,0.08), transparent);
}
.mock-cert h4 { font-size: 1rem; margin: 0.4rem 0; }
.mock-cert p { font-size: 0.74rem; }
.mock-qr {
  width: 88px; height: 88px; margin: 0 auto 0.8rem; border-radius: 10px;
  background:
    linear-gradient(90deg, var(--text) 33%, transparent 33%, transparent 66%, var(--text) 66%) 0 0 / 12px 12px,
    linear-gradient(0deg, var(--text) 33%, transparent 33%, transparent 66%, var(--text) 66%) 0 0 / 12px 12px;
  opacity: 0.85;
}
.mock-scan {
  height: 160px; border-radius: 14px; border: 1px solid var(--border);
  background: radial-gradient(circle at center, rgba(59,130,246,0.15), transparent 70%), var(--bg-2);
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.mock-scan::before {
  content: ""; position: absolute; inset: 18% 22%; border: 2px solid var(--brand);
  border-radius: 12px; box-shadow: 0 0 0 999px rgba(0,0,0,0.25);
}
.mock-scan span { position: relative; z-index: 1; font-size: 0.78rem; font-weight: 650; color: #fff; }
.mock-chart {
  height: 120px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-2);
  display: flex; align-items: flex-end; gap: 0.45rem; padding: 0.8rem 0.9rem 0.6rem;
}
.mock-chart i {
  flex: 1; border-radius: 6px 6px 2px 2px; background: var(--grad); min-height: 20%;
}
.mock-chart i:nth-child(2) { height: 55%; }
.mock-chart i:nth-child(3) { height: 78%; }
.mock-chart i:nth-child(4) { height: 42%; }
.mock-chart i:nth-child(5) { height: 90%; }
.mock-chart i:nth-child(6) { height: 65%; }
.mock-chart i:nth-child(7) { height: 48%; }
@media (max-width: 900px) {
  .mock-app-body { grid-template-columns: 1fr; }
  .mock-sidebar { display: none; }
  .shot-panels { min-height: 0; }
}
@media (max-width: 560px) {
  .shot-tabs { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
  .shot-tab { white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  .shot-panel { animation: none; }
}