/* =============================================
   SIFRA AI — Design System
   Font: Poppins | Theme: Clean Light + Accents
   ============================================= */

/* ── Variables ── */
:root {
  --primary:    #4f46e5;
  --primary-lt: #eef2ff;
  --primary-dk: #3730a3;
  --accent:     #06b6d4;
  --dark:       #0f172a;
  --mid:        #334155;
  --muted:      #64748b;
  --light:      #f8fafc;
  --border:     #e2e8f0;
  --white:      #ffffff;

  --grad:       linear-gradient(135deg, #4f46e5, #06b6d4);
  --grad-soft:  linear-gradient(135deg, #eef2ff, #ecfeff);

  --shadow-sm:  0 1px 4px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl:  0 24px 60px rgba(79,70,229,0.15);

  --radius:     12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'Poppins',sans-serif; color:var(--dark); background:var(--white); line-height:1.65; overflow-x:hidden; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { text-decoration:none; color:inherit; }
ul { list-style:none; }
::selection { background:rgba(79,70,229,0.15); }

::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:#f1f5f9; }
::-webkit-scrollbar-thumb { background:var(--primary); border-radius:6px; }

/* ── Helpers ── */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.grad-text-light {
  background: linear-gradient(135deg, #a5f3fc, #fff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ── Scroll Reveal ── */
.fade-up { opacity:0; transform:translateY(28px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
.fade-up:nth-child(2) { transition-delay:.1s; }
.fade-up:nth-child(3) { transition-delay:.2s; }
.fade-up:nth-child(4) { transition-delay:.3s; }
.fade-up.visible { opacity:1; transform:translateY(0); }

/* ── Navbar ── */
.navbar {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  padding:18px 0;
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:all .3s var(--ease);
}
.navbar.scrolled {
  padding:12px 0;
  border-color:var(--border);
  box-shadow:var(--shadow-sm);
}
.nav-wrap {
  max-width:1200px; margin:0 auto; padding:0 24px;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
}
.logo {
  font-size:1.5rem; font-weight:800; letter-spacing:-0.5px;
  color:var(--primary);
}
.logo span { color:var(--accent); }

.nav-links { display:flex; align-items:center; gap:32px; }
.nav-links a {
  font-size:.875rem; font-weight:500; color:var(--mid);
  transition:color .25s; position:relative; padding-bottom:2px;
}
.nav-links a::after {
  content:''; position:absolute; bottom:0; left:0;
  width:0; height:2px; background:var(--grad); border-radius:2px;
  transition:width .3s var(--ease);
}
.nav-links a:hover { color:var(--primary); }
.nav-links a:hover::after { width:100%; }

.btn-cta {
  display:inline-flex; align-items:center; gap:7px;
  padding:10px 22px;
  background:var(--grad); color:#fff;
  font-size:.85rem; font-weight:600;
  border-radius:var(--radius); border:none; cursor:pointer;
  transition:all .3s var(--ease);
  box-shadow:0 4px 16px rgba(79,70,229,0.3);
}
.btn-cta:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(79,70,229,0.35); }

.burger {
  display:none; flex-direction:column; gap:5px;
  background:none; border:none; cursor:pointer; padding:4px;
}
.burger span { display:block; width:24px; height:2px; background:var(--mid); border-radius:2px; transition:all .3s var(--ease); }
.burger.active span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity:0; }
.burger.active span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }

/* ── Buttons ── */
.btn-primary {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 32px; border-radius:var(--radius-lg);
  background:var(--grad); color:#fff;
  font-family:'Poppins',sans-serif; font-size:.95rem; font-weight:600;
  border:none; cursor:pointer;
  box-shadow:0 6px 24px rgba(79,70,229,0.35);
  transition:all .3s var(--ease); position:relative; overflow:hidden;
}
.btn-primary::before {
  content:''; position:absolute; inset:0;
  background:rgba(255,255,255,0); transition:background .3s;
}
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 12px 32px rgba(79,70,229,0.4); }
.btn-primary:hover::before { background:rgba(255,255,255,0.1); }

.btn-outline {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 30px; border-radius:var(--radius-lg);
  background:transparent; color:var(--primary);
  font-family:'Poppins',sans-serif; font-size:.95rem; font-weight:600;
  border:2px solid var(--primary); cursor:pointer;
  transition:all .3s var(--ease);
}
.btn-outline:hover { background:var(--primary-lt); transform:translateY(-2px); }

/* ── Sections ── */
.sec-white { padding:96px 0; background:var(--white); }
.sec-gray  { padding:96px 0; background:var(--light); }
.sec-accent { padding:96px 0; background:var(--grad); }

.sec-hd { text-align:center; margin-bottom:56px; }
.sec-hd h2 { font-size:clamp(1.75rem,3vw,2.4rem); font-weight:700; margin-bottom:10px; }
.sec-hd p  { color:var(--muted); font-size:1rem; max-width:520px; margin:0 auto; }

.eyebrow {
  display:inline-block;
  font-size:.75rem; font-weight:600; letter-spacing:.1em; text-transform:uppercase;
  color:var(--primary); margin-bottom:10px;
  padding:4px 12px; background:var(--primary-lt); border-radius:100px;
}
.eyebrow.light { color:#a5f3fc; background:rgba(255,255,255,0.15); }

/* ── Two-col layout ── */
.two-col {
  display:grid; grid-template-columns:1fr 1fr;
  gap:64px; align-items:center;
}
.two-col.gap-xl { gap:72px; }

.lead  { font-size:1.05rem; font-weight:500; color:var(--dark); margin-bottom:16px; }
.body  { font-size:.95rem; color:var(--mid); line-height:1.8; }

/* ── HERO ── */
.hero {
  min-height:100vh; padding:120px 0 80px;
  position:relative; overflow:hidden;
  background: linear-gradient(160deg, #fafaff 0%, #f0f4ff 60%, #e0f2fe 100%);
  display:flex; align-items:center;
}

.blob {
  position:absolute; border-radius:50%;
  filter:blur(80px); pointer-events:none; z-index:0;
}
.b1 { width:600px; height:600px; background:rgba(79,70,229,0.08); top:-100px; right:-100px; }
.b2 { width:400px; height:400px; background:rgba(6,182,212,0.08); bottom:-50px; left:-50px; }

.hero .container { position:relative; z-index:1; width:100%; }

.hero-grid {
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:center;
}

.hero-text .badge {
  display:inline-flex; align-items:center; gap:7px;
  padding:6px 16px; margin-bottom:24px;
  background:rgba(79,70,229,0.08); border:1px solid rgba(79,70,229,0.2);
  border-radius:100px; font-size:.8rem; font-weight:600; color:var(--primary);
}

.hero-text h1 {
  font-size:clamp(2.2rem,5vw,3.8rem); font-weight:800;
  line-height:1.15; margin-bottom:20px; letter-spacing:-1px;
}

.hero-text p { font-size:1rem; color:var(--mid); line-height:1.8; margin-bottom:36px; max-width:480px; }

.hero-btns { display:flex; gap:16px; flex-wrap:wrap; }

/* Mockup */
.mockup {
  background:#fff; border-radius:var(--radius-xl);
  box-shadow:var(--shadow-xl);
  overflow:hidden; border:1px solid var(--border);
  animation:float 5s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

.mockup-bar {
  display:flex; align-items:center; gap:6px;
  padding:12px 16px;
  background:#f8fafc; border-bottom:1px solid var(--border);
}
.dot { width:10px; height:10px; border-radius:50%; }
.dot.r{background:#ff5f56} .dot.y{background:#ffbd2e} .dot.g{background:#27c93f}
.mockup-title { font-size:.78rem; font-weight:500; color:var(--muted); margin-left:8px; }

.mockup-body { padding:20px; display:flex; flex-direction:column; gap:14px; }

.bubble {
  padding:10px 14px; border-radius:12px;
  font-size:.83rem; line-height:1.5; max-width:85%;
}
.bubble.user { background:var(--primary-lt); color:var(--primary); align-self:flex-end; font-weight:500; }
.bubble.ai { background:#f8fafc; border:1px solid var(--border); align-self:flex-start; }

.ai-tag { display:flex; align-items:center; gap:5px; font-weight:600; color:var(--primary); font-size:.78rem; margin-bottom:5px; }

.typing { display:flex; gap:4px; margin-top:8px; }
.typing i {
  display:block; width:6px; height:6px; background:var(--primary); border-radius:50%;
  animation:bounce .9s ease-in-out infinite;
}
.typing i:nth-child(2){animation-delay:.15s} .typing i:nth-child(3){animation-delay:.3s}
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-5px)} }

.visual-bar {
  display:flex; align-items:center; gap:12px;
  padding:12px 14px; background:#f0fdf4;
  border-radius:var(--radius); border:1px solid #bbf7d0;
}
.vis-icon { font-size:1.4rem; color:#22c55e; flex-shrink:0; }
.bars { flex:1; display:flex; flex-direction:column; gap:5px; }
.bar { height:7px; border-radius:4px; animation:grow 1.5s ease-out forwards; transform-origin:left; }
@keyframes grow { from{width:0!important} }

/* Stats */
.stats-row {
  display:flex; align-items:center; justify-content:center;
  flex-wrap:wrap; gap:0;
  margin-top:64px; padding:28px 40px;
  background:#fff; border-radius:var(--radius-xl);
  box-shadow:var(--shadow-md); border:1px solid var(--border);
}
.stat { text-align:center; padding:0 36px; }
.sn { font-size:1.7rem; font-weight:700; background:var(--grad); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.sl { font-size:.78rem; color:var(--muted); font-weight:500; margin-top:2px; }
.sep { width:1px; height:48px; background:var(--border); }

/* ── Info card (what is) ── */
.info-card {
  background:#fff; border-radius:var(--radius-xl);
  padding:40px 36px; box-shadow:var(--shadow-lg);
  border:1px solid var(--border); text-align:center;
  transition:transform .3s var(--ease);
}
.info-card:hover { transform:translateY(-6px); }
.info-icon {
  width:72px; height:72px; margin:0 auto 20px;
  background:var(--grad); border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:1.8rem; color:#fff;
}
.info-title { font-size:1.1rem; font-weight:700; color:var(--dark); margin-bottom:6px; }
.info-sub  { font-size:.85rem; color:var(--muted); }
.info-divider { height:1px; background:var(--border); margin:20px 0; }
.info-list { text-align:left; display:flex; flex-direction:column; gap:10px; }
.info-list li { display:flex; align-items:center; gap:10px; font-size:.9rem; color:var(--mid); }
.info-list li i { color:#22c55e; font-size:.85rem; }

/* Chips */
.chips { display:flex; flex-wrap:wrap; gap:8px; margin-top:24px; }
.chip {
  padding:5px 14px; border-radius:100px;
  font-size:.78rem; font-weight:600;
}
.chip.blue   { background:#eff6ff; color:#3b82f6; }
.chip.green  { background:#f0fdf4; color:#22c55e; }
.chip.purple { background:#fdf4ff; color:#a855f7; }
.chip.orange { background:#fff7ed; color:#f97316; }

/* ── Features ── */
.grid-4 {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.fcard {
  background:#fff; border-radius:var(--radius-lg); padding:32px 28px;
  border:1px solid var(--border); box-shadow:var(--shadow-sm);
  transition:all .35s var(--ease);
}
.fcard:hover { transform:translateY(-6px); box-shadow:var(--shadow-lg); border-color:rgba(79,70,229,0.2); }
.ficon {
  width:52px; height:52px; border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center;
  font-size:1.35rem; margin-bottom:18px;
  transition:transform .3s var(--ease);
}
.fcard:hover .ficon { transform:scale(1.1); }
.fcard h3 { font-size:1rem; font-weight:700; margin-bottom:10px; }
.fcard p  { font-size:.875rem; color:var(--muted); line-height:1.7; }

/* ── Steps ── */
.steps { display:flex; flex-direction:column; gap:24px; margin-top:28px; }
.step {
  display:flex; gap:18px; align-items:flex-start;
  padding:18px 20px;
  background:#fff; border-radius:var(--radius); border:1px solid var(--border);
  transition:all .3s var(--ease);
}
.step:hover { border-color:var(--primary); box-shadow:var(--shadow-md); }
.step-num {
  flex-shrink:0; width:40px; height:40px;
  background:var(--grad); color:#fff;
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-size:.85rem; font-weight:700;
}
.step h4 { font-size:.95rem; font-weight:600; margin-bottom:3px; }
.step p  { font-size:.83rem; color:var(--muted); }

/* Premium card */
.prem-card {
  background:#fff; border-radius:var(--radius-xl); padding:36px 32px;
  border:1px solid var(--border); box-shadow:var(--shadow-lg);
}
.prem-head {
  display:flex; align-items:center; gap:10px; margin-bottom:24px;
  padding-bottom:20px; border-bottom:1px solid var(--border);
}
.prem-head i { color:#f59e0b; font-size:1.25rem; }
.prem-head h3 { font-size:1.15rem; font-weight:700; }
.check-list { display:flex; flex-direction:column; gap:12px; }
.check-list li { display:flex; align-items:center; gap:10px; font-size:.9rem; color:var(--mid); }
.check-list li i { color:var(--primary); font-size:.85rem; }
.course-note {
  margin-top:24px; padding:14px 16px;
  background:var(--primary-lt); border-radius:var(--radius);
  display:flex; align-items:flex-start; gap:10px;
  font-size:.87rem; color:var(--mid);
}
.course-note i { color:var(--primary); margin-top:2px; flex-shrink:0; }

/* ── Audience (Premium Upgrade) ── */
.aud-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 50px;
}

/* CARD */
.aud-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;

  padding: 30px 24px;
  border-radius: var(--radius-lg);

  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.2);

  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

/* GLOW EFFECT ✨ */
.aud-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.25), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

/* ICON */
.aud-card i {
  font-size: 32px;
  margin-bottom: 12px;
  color: #a5f3fc;
  transition: transform 0.4s ease;
}

/* TEXT */
.aud-card p {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.3px;
}

/* HOVER EFFECT 🔥 */
.aud-card:hover {
  transform: translateY(-10px) scale(1.03);
  background: linear-gradient(135deg, #4999ed, #06b6d4);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}

.aud-card:hover::before {
  opacity: 1;
}

.aud-card:hover i {
  transform: scale(1.2) rotate(5deg);
}

/* ── Vision Box (Premium) ── */
.vision-box {
  max-width: 760px;
  margin: 0 auto;

  padding: 30px 40px;
  border-radius: var(--radius-xl);

  background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.05));
  backdrop-filter: blur(14px);

  border: 1px solid rgba(255,255,255,0.25);

  text-align: center;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.95);

  box-shadow: 0 15px 40px rgba(0,0,0,0.3);
  transition: 0.4s;
}

/* HOVER EFFECT */
.vision-box:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 60px rgba(0,0,0,0.4);
}

/* TEXT */
.vision-box strong {
  color: #fff;
  font-weight: 700;
}

/* ── About box ── */
.about-box {
  background:var(--primary-lt); border-radius:var(--radius-xl);
  padding:32px 28px; border:1px solid rgba(79,70,229,0.15);
}
.ab-title { font-size:1rem; font-weight:700; color:var(--primary); margin-bottom:12px; display:flex; align-items:center; gap:8px; }
.disclaimer { margin-top:16px; padding:10px 14px; background:rgba(79,70,229,0.08); border-radius:var(--radius); font-size:.82rem; color:var(--muted); line-height:1.6; }

/* ── Download ── */
.dl-title { font-size:1.3rem; font-weight:700; margin-bottom:10px; }
.app-btns { display:flex; gap:14px; flex-wrap:wrap; margin-top:20px; }
.app-btn {
  display:inline-flex; align-items:center; gap:10px;
  padding:13px 24px; background:var(--dark); color:#fff;
  border-radius:var(--radius); font-size:.88rem; font-weight:600;
  transition:all .3s var(--ease);
}
.app-btn:hover { background:#1e293b; transform:translateY(-2px); box-shadow:var(--shadow-md); }
.app-btn i { font-size:1.25rem; }

.social-wrap { margin-top:28px; }
.social-lbl { font-size:.78rem; font-weight:600; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); margin-bottom:12px; }
.social-row { display:flex; gap:10px; }
.soc {
  width:42px; height:42px;
  background:#fff; border:1px solid var(--border);
  border-radius:var(--radius); display:flex; align-items:center; justify-content:center;
  font-size:1rem; color:var(--mid); transition:all .3s var(--ease);
}
.soc:hover { transform:translateY(-3px); }
.soc.ig:hover { background:radial-gradient(circle at 30% 110%,#f09433,#e6683c,#dc2743,#cc2366,#bc1888); color:#fff; border-color:transparent; }
.soc.fb:hover { background:#1877f2; color:#fff; border-color:transparent; }
.soc.li:hover { background:#0a66c2; color:#fff; border-color:transparent; }

/* Contact card */
.contact-card {
  background:#fff; border-radius:var(--radius-xl);
  padding:36px 32px; box-shadow:var(--shadow-lg); border:1px solid var(--border);
}
.contact-card h3 { font-size:1.15rem; font-weight:700; display:flex; align-items:center; gap:8px; margin-bottom:22px; }
.contact-card h3 i { color:var(--primary); }
.crow { display:flex; align-items:flex-start; gap:12px; margin-bottom:14px; font-size:.9rem; color:var(--mid); }
.crow i { color:var(--primary); margin-top:3px; flex-shrink:0; width:16px; text-align:center; }
.supp {
  display:flex; align-items:flex-start; gap:12px;
  margin-top:18px; padding:14px 16px;
  background:var(--primary-lt); border-radius:var(--radius);
  font-size:.85rem; color:var(--mid);
}
.supp i { color:var(--primary); margin-top:2px; flex-shrink:0; }

/* ── Footer ── */
footer { background:var(--dark); padding:48px 0; }
.foot-inner { display:flex; flex-direction:column; align-items:center; gap:16px; }
.foot-logo { font-size:1.5rem; font-weight:800; color:#fff; }
.foot-logo span { color:var(--accent); }
.foot-copy { font-size:.82rem; color:#64748b; max-width:560px; text-align:center; }
.foot-links { display:flex; flex-wrap:wrap; justify-content:center; gap:24px; }
.foot-links a { font-size:.82rem; color:#64748b; transition:color .25s; }
.foot-links a:hover { color:#94a3b8; }

/* ── Responsive ── */
@media (max-width:1100px) {
  .grid-4 { grid-template-columns:repeat(2,1fr); }
}

@media (max-width:900px) {
  .hero-grid, .two-col { grid-template-columns:1fr; gap:40px; }
  .hero-text h1 { font-size:2.5rem; }
  .hero-text p { max-width:100%; }
  .btn-cta { display:none; }
  .burger { display:flex; }
  .nav-links {
    position:fixed; top:0; left:0; height:100vh; width:260px;
    background:#fff; flex-direction:column; align-items:flex-start;
    padding:80px 32px 32px; gap:24px;
    box-shadow:var(--shadow-xl);
    transform:translateX(-100%); opacity:0;
    transition:all .35s var(--ease);
    z-index:999;
  }
  .nav-links.open { transform:translateX(0); opacity:1; }
  .nav-links a { font-size:1rem; }
  .stats-row { gap:0; padding:20px; }
  .sep { height:36px; }
  .stat { padding:0 20px; }
  .sn { font-size:1.3rem; }
}

@media (max-width:600px) {
  .sec-white, .sec-gray, .sec-accent { padding:64px 0; }
  .grid-4 { grid-template-columns:1fr; }
  .hero-btns, .app-btns { flex-direction:column; }
  .stats-row { flex-direction:column; gap:20px; }
  .sep { display:none; }
  .hero-card { display:none; }
  .aud-grid { gap:12px; }
  .aud-card { padding:20px 24px; }
}
.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.hero-card {
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}