/* ─────────────────────────────────────────────────────────
   ISJ LEARNING — PREMIUM LANDING PAGE
   Design: Dark-tech / Premium SaaS EdTech
   Colors: Navy #0B1020 | Blue #3B82F6 | Cyan #06B6D4 | Purple #8B5CF6
   ───────────────────────────────────────────────────────── */

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary:   #0B1020;
  --bg-secondary: #111827;
  --bg-card:      #161f35;
  --bg-card-alt:  #0f172a;
  --accent-blue:  #3B82F6;
  --accent-cyan:  #06B6D4;
  --accent-purple:#8B5CF6;
  --text-primary: #F8FAFC;
  --text-secondary:#CBD5E1;
  --text-muted:   #64748B;
  --border:       rgba(255,255,255,.07);
  --border-glow:  rgba(59,130,246,.3);
  --font-head:    'Plus Jakarta Sans', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --radius-sm:    8px;
  --radius-md:    14px;
  --radius-lg:    20px;
  --radius-xl:    28px;
  --trans:        all .25s cubic-bezier(.4,0,.2,1);
  --shadow-card:  0 4px 24px rgba(0,0,0,.4);
  --shadow-glow:  0 0 40px rgba(59,130,246,.15);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

::selection { background: rgba(59,130,246,.35); color: #fff; }

/* === TYPOGRAPHY === */
h1,h2,h3,h4 { font-family: var(--font-head); line-height: 1.15; letter-spacing: -.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.9rem, 3.5vw, 2.8rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
p  { color: var(--text-secondary); font-size: .97rem; }

.gradient-text {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === LAYOUT === */
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

.section-header { text-align: center; margin-bottom: 64px; }
.section-header p { max-width: 560px; margin: 12px auto 0; font-size: 1.05rem; }

.section-badge {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 100px;
  border: 1px solid rgba(59,130,246,.35);
  background: rgba(59,130,246,.08);
  color: var(--accent-blue);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* === BUTTONS === */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent-blue), #2563eb);
  color: #fff; font-family: var(--font-head); font-weight: 600; font-size: .95rem;
  border-radius: var(--radius-md); border: none; cursor: pointer;
  text-decoration: none;
  box-shadow: 0 0 0 0 rgba(59,130,246,.4);
  transition: var(--trans);
  position: relative; overflow: hidden;
}
.btn-primary::after {
  content:''; position:absolute; inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.12),transparent);
  opacity:0; transition:var(--trans);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(59,130,246,.45); }
.btn-primary:hover::after { opacity:1; }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px;
  background: rgba(255,255,255,.05); backdrop-filter: blur(10px);
  color: var(--text-primary); font-family: var(--font-head); font-weight: 600; font-size: .95rem;
  border-radius: var(--radius-md); border: 1px solid var(--border);
  cursor: pointer; text-decoration: none; transition: var(--trans);
}
.btn-ghost:hover { background: rgba(255,255,255,.09); border-color: rgba(255,255,255,.2); transform: translateY(-2px); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary); font-family: var(--font-head); font-weight: 600; font-size: 1rem;
  border-radius: var(--radius-md); border: 1px solid var(--border);
  cursor: pointer; text-decoration: none; transition: var(--trans);
}
.btn-outline:hover { border-color: rgba(59,130,246,.5); color: var(--accent-blue); transform: translateY(-2px); }

.btn-lg  { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-md); }
.btn-xl  { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius-lg); }

/* === PROGRESS BAR === */
.progress-bar {
  height: 6px; background: rgba(255,255,255,.08); border-radius: 100px; overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 100px;
  transition: width 1s ease;
}

/* === REVEAL ANIMATIONS === */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════════════════════════
   NAVBAR
══════════════════════════════════════════════════════════ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0;
  transition: all .3s ease;
}
.navbar.scrolled {
  background: rgba(11,16,32,.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; gap: 32px;
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.logo-img {
  width: 40px; height: 40px;
  object-fit: contain;
  border-radius: 8px;
  background: rgba(255,255,255,.05);
}
.logo-text {
  font-family: var(--font-head); font-weight: 700; font-size: 1.1rem;
  color: var(--text-primary); letter-spacing: -.01em;
}
.logo-text span { color: var(--accent-blue); }

.nav-links {
  display: flex; align-items: center; gap: 32px;
  list-style: none; flex: 1; justify-content: center;
}
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: .9rem; font-weight: 500;
  transition: var(--trans); position: relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:-4px; left:0; right:0;
  height:2px; background:var(--accent-blue);
  transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta .btn-primary { padding: 9px 20px; font-size: .88rem; }
.nav-cta .btn-ghost   { padding: 9px 20px; font-size: .88rem; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: var(--trans);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ══════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
  position: relative; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }

.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.6) 0%, transparent 75%);
}

.glow {
  position: absolute; border-radius: 50%;
  filter: blur(80px); pointer-events: none;
}
.hero-bg .glow-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,.18), transparent 70%);
  top: -100px; left: -100px;
  animation: floatGlow 8s ease-in-out infinite;
}
.hero-bg .glow-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,.12), transparent 70%);
  bottom: -50px; right: 5%;
  animation: floatGlow 10s ease-in-out infinite reverse;
}
.hero-bg .glow-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(6,182,212,.1), transparent 70%);
  top: 40%; left: 50%;
  animation: floatGlow 7s ease-in-out infinite 2s;
}
@keyframes floatGlow {
  0%, 100% { transform: translate(0,0); }
  50%       { transform: translate(20px, -20px); }
}

.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  position: relative; z-index: 2;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: rgba(59,130,246,.1); border: 1px solid rgba(59,130,246,.3);
  border-radius: 100px; color: var(--accent-cyan);
  font-size: .8rem; font-weight: 600; letter-spacing: .04em;
  margin-bottom: 20px;
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.6;transform:scale(.85)} }

.hero-headline { margin-bottom: 20px; }
.hero-sub { font-size: 1.1rem; max-width: 500px; margin-bottom: 32px; line-height: 1.7; }

.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }

.hero-trust {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding: 16px 20px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  border-radius: var(--radius-md); width: fit-content;
}
.trust-item { display: flex; flex-direction: column; align-items: center; }
.trust-num  { font-family: var(--font-head); font-size: 1.3rem; font-weight: 800; color: var(--text-primary); }
.trust-item span:last-child { font-size: .75rem; color: var(--text-muted); }
.trust-div  { width: 1px; height: 32px; background: var(--border); }

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

.dash-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid var(--border);
}
.dash-dots { display: flex; gap: 6px; }
.dash-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.15);
}
.dash-dots span:nth-child(1) { background: #ff5f57; }
.dash-dots span:nth-child(2) { background: #ffbd2e; }
.dash-dots span:nth-child(3) { background: #28c840; }
.dash-title { font-size: .82rem; color: var(--text-muted); margin-left: 6px; }

.dash-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }

.dash-progress-section { display: flex; flex-direction: column; gap: 8px; }
.dp-row { display: flex; justify-content: space-between; font-size: .82rem; }
.dp-row span:first-child { color: var(--text-secondary); }
.dp-pct { color: var(--accent-blue); font-weight: 700; }

.dash-stats-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; }
.ds-card {
  padding: 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); text-align: center;
  transition: var(--trans);
}
.ds-card:hover { transform: translateY(-2px); }
.ds-card.blue  { background: rgba(59,130,246,.08); border-color: rgba(59,130,246,.2); }
.ds-card.cyan  { background: rgba(6,182,212,.08);  border-color: rgba(6,182,212,.2);  }
.ds-card.purple{ background: rgba(139,92,246,.08); border-color: rgba(139,92,246,.2); }
.ds-num  { font-family: var(--font-head); font-size: 1.3rem; font-weight: 800; }
.ds-label{ font-size: .72rem; color: var(--text-muted); margin-top: 2px; }
.ds-card.blue   .ds-num  { color: var(--accent-blue); }
.ds-card.cyan   .ds-num  { color: var(--accent-cyan); }
.ds-card.purple .ds-num  { color: var(--accent-purple); }

.dash-question {
  background: var(--bg-card-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 14px;
}
.dq-label { font-size: .72rem; color: var(--accent-cyan); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 8px; }
.dq-text  { font-size: .86rem; color: var(--text-primary); margin-bottom: 12px; line-height: 1.5; }
.dq-options { display: flex; flex-direction: column; gap: 6px; }
.dq-opt {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 7px;
  border: 1px solid var(--border); font-size: .8rem; color: var(--text-secondary);
  transition: var(--trans);
}
.dq-opt.correct { background: rgba(16,185,129,.08); border-color: rgba(16,185,129,.3); color: #10b981; }
.opt-letter {
  width: 22px; height: 22px; border-radius: 4px;
  background: rgba(255,255,255,.06); font-size: .75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  color: var(--text-muted);
}
.dq-opt.correct .opt-letter { background: rgba(16,185,129,.2); color: #10b981; }
.dq-opt svg { margin-left: auto; flex-shrink: 0; }

/* Floating cards */
.float-card {
  position: absolute;
  display: flex; align-items: center; gap: 7px;
  padding: 8px 12px;
  background: rgba(15,23,42,.9); border: 1px solid var(--border);
  border-radius: 10px; font-size: .78rem; font-weight: 600;
  backdrop-filter: blur(10px);
  color: var(--text-primary);
}
.fc-1 { top: -16px; right: 24px; animation: floatSmall 4s ease-in-out infinite; }
.fc-2 { bottom: 20px; left: -20px; animation: floatSmall 5s ease-in-out infinite 1.5s; }
@keyframes floatSmall { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }

.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  color: var(--text-muted); animation: bounce 2s ease-in-out infinite;
  z-index: 2;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(6px)} }

/* ══════════════════════════════════════════════════════════
   TRUST BAR
══════════════════════════════════════════════════════════ */
.trust-bar {
  padding: 40px 0;
  background: rgba(255,255,255,.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.tb-label {
  text-align: center; font-size: .82rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 24px;
}
.trust-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 32px; flex-wrap: wrap;
}
.ts-item { text-align: center; }
.ts-num  { display: block; font-family: var(--font-head); font-size: 1.8rem; font-weight: 800; color: var(--text-primary); }
.ts-desc { font-size: .8rem; color: var(--text-muted); }
.ts-sep  { width: 1px; height: 40px; background: var(--border); flex-shrink: 0; }

/* ══════════════════════════════════════════════════════════
   PROBLEM / SOLUTION
══════════════════════════════════════════════════════════ */
.problem-section { padding: 100px 0; }

.compare-grid {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 24px; align-items: center;
}
.compare-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl); border: 1px solid var(--border);
  padding: 36px; box-shadow: var(--shadow-card);
}
.bad-card  { border-color: rgba(239,68,68,.15); background: rgba(239,68,68,.03); }
.good-card { border-color: rgba(16,185,129,.2);  background: rgba(16,185,129,.04); box-shadow: 0 0 30px rgba(16,185,129,.06); }

.cc-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 28px; font-family: var(--font-head);
  font-weight: 700; font-size: 1.05rem;
}
.cc-icon {
  width: 38px; height: 38px; border-radius: 9px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.cc-icon-red   { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.25); }
.cc-icon-green { background: rgba(16,185,129,.12); border: 1px solid rgba(16,185,129,.25); }

.cc-list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.cc-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: .92rem; color: var(--text-secondary);
}
.cc-x     { color: #ef4444; font-weight: 700; flex-shrink: 0; }
.cc-check { color: #10b981; font-weight: 700; flex-shrink: 0; }

.compare-vs { display: flex; align-items: center; justify-content: center; }
.vs-circle {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 800; font-size: .85rem;
  box-shadow: 0 0 20px rgba(59,130,246,.3);
}

/* ══════════════════════════════════════════════════════════
   PLATFORM SHOWCASE
══════════════════════════════════════════════════════════ */
.showcase-section { padding: 100px 0; background: var(--bg-secondary); }

.showcase-tabs {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; flex-wrap: wrap; margin-bottom: 40px;
}
.stab {
  padding: 9px 20px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text-muted); font-family: var(--font-head); font-weight: 600;
  font-size: .86rem; border-radius: 100px; cursor: pointer;
  transition: var(--trans);
}
.stab:hover { color: var(--text-primary); border-color: rgba(255,255,255,.2); }
.stab.active {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  border-color: transparent; color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,.35);
}

.sdisp { display: none; }
.sdisp.active { display: block; }

.sdisp-inner {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 20px; overflow: hidden;
}

/* Browser frame */
.sdisp-browser {
  background: var(--bg-card);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}
.browser-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 16px;
  background: rgba(255,255,255,.04); border-bottom: 1px solid var(--border);
}
.bb-dots { display: flex; gap: 5px; }
.bb-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.12);
}
.bb-dots span:nth-child(1) { background: #ff5f57; }
.bb-dots span:nth-child(2) { background: #ffbd2e; }
.bb-dots span:nth-child(3) { background: #28c840; }
.bb-url {
  flex: 1; background: rgba(255,255,255,.05); border-radius: 5px;
  padding: 4px 10px; font-size: .75rem; color: var(--text-muted);
}
.browser-body { padding: 20px; min-height: 340px; }

/* Study UI */
.study-ui { display: grid; grid-template-columns: 200px 1fr; gap: 20px; height: 100%; }
.sui-sidebar { border-right: 1px solid var(--border); padding-right: 16px; display: flex; flex-direction: column; gap: 4px; }
.sui-mod {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 8px;
  font-size: .82rem; color: var(--text-muted); cursor: pointer; transition: var(--trans);
}
.sui-mod.active { background: rgba(59,130,246,.12); color: var(--accent-blue); border: 1px solid rgba(59,130,246,.2); }
.sui-mod:hover:not(.active) { background: rgba(255,255,255,.04); color: var(--text-secondary); }
.mod-num { font-family: var(--font-head); font-weight: 700; font-size: .72rem; color: var(--text-muted); }
.sui-content h3 { font-size: 1rem; margin-bottom: 10px; }
.sui-tags { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.tag { padding: 3px 10px; border-radius: 100px; font-size: .72rem; font-weight: 600; }
.tag.blue   { background: rgba(59,130,246,.12); color: var(--accent-blue); }
.tag.cyan   { background: rgba(6,182,212,.12);  color: var(--accent-cyan); }
.sui-content p { font-size: .84rem; margin-bottom: 14px; }
.sui-progress { margin-bottom: 16px; }
.sp-label { display: flex; justify-content: space-between; font-size: .8rem; margin-bottom: 6px; color: var(--text-secondary); }
.sui-btn { padding: 9px 18px; font-size: .86rem; }

/* Practice UI */
.practice-ui { display: flex; flex-direction: column; gap: 14px; }
.pui-header { display: flex; justify-content: space-between; align-items: center; }
.pui-q { font-size: .84rem; color: var(--text-muted); }
.pui-q strong { color: var(--text-primary); }
.pui-timer { font-size: .82rem; color: var(--accent-cyan); font-weight: 600; }
.pui-prog { margin-bottom: 4px; }
.pui-question p { font-size: .92rem; color: var(--text-primary); margin-bottom: 14px; }
.pui-opts { display: flex; flex-direction: column; gap: 8px; }
.pui-opt {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); cursor: pointer; transition: var(--trans);
}
.pui-opt:hover { border-color: rgba(59,130,246,.3); background: rgba(59,130,246,.05); }
.pui-opt.sel { background: rgba(59,130,246,.1); border-color: rgba(59,130,246,.4); }
.pui-opt span:first-child {
  width: 26px; height: 26px; border-radius: 6px; flex-shrink: 0;
  background: rgba(255,255,255,.06); display: flex; align-items: center; justify-content: center;
  font-size: .78rem; font-weight: 700; color: var(--text-muted);
}
.pui-opt.sel span:first-child { background: var(--accent-blue); color: #fff; }
.pui-opt p { font-size: .84rem; color: var(--text-secondary); margin: 0; }
.pui-nav { display: flex; justify-content: space-between; margin-top: 8px; }
.pui-nav .btn-ghost, .pui-nav .btn-primary { padding: 9px 18px; font-size: .86rem; }

/* Flashcard UI */
.fc-ui { display: flex; flex-direction: column; gap: 14px; align-items: center; }
.fcu-top { display: flex; justify-content: space-between; width: 100%; font-size: .82rem; }
.fcu-deck { color: var(--accent-blue); font-weight: 600; }
.fcu-count { color: var(--text-muted); }
.fc-card {
  width: 100%; min-height: 160px;
  background: var(--bg-card-alt); border: 1px solid var(--border); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  cursor: pointer; perspective: 800px;
  position: relative;
}
.fc-front p, .fc-back p { font-size: .92rem; text-align: center; color: var(--text-primary); margin: 0; }
.fb-label { font-size: .72rem; color: var(--accent-cyan); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 8px; display: block; text-align: center; }
.fc-card.flipped { background: rgba(6,182,212,.04); border-color: rgba(6,182,212,.2); }
.fcu-btns { display: flex; gap: 12px; }
.fcb-wrong, .fcb-right {
  padding: 9px 24px; border-radius: var(--radius-md); border: none;
  font-family: var(--font-head); font-weight: 600; font-size: .86rem; cursor: pointer;
  transition: var(--trans);
}
.fcb-wrong { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); color: #ef4444; }
.fcb-right { background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.3); color: #10b981; }
.fcb-wrong:hover { background: rgba(239,68,68,.2); transform: translateY(-2px); }
.fcb-right:hover { background: rgba(16,185,129,.2); transform: translateY(-2px); }

/* Exam UI */
.exam-ui { display: flex; flex-direction: column; gap: 16px; }
.exam-header { display: flex; justify-content: space-between; align-items: center; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.exam-badge { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.3); color: #ef4444; padding: 3px 10px; border-radius: 100px; font-size: .7rem; font-weight: 700; letter-spacing: .07em; }
.exam-name { font-size: .88rem; color: var(--text-primary); font-weight: 600; margin-left: 10px; }
.exam-timer { display: flex; align-items: center; gap: 6px; }
.et-time { font-family: var(--font-head); font-size: 1.1rem; font-weight: 800; color: #ef4444; }
.exam-progress-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; }
.ep-item { background: var(--bg-card-alt); border: 1px solid var(--border); border-radius: 8px; padding: 10px; text-align: center; }
.ep-item span { display: block; font-size: .72rem; color: var(--text-muted); }
.ep-item strong { display: block; font-family: var(--font-head); font-size: 1.1rem; font-weight: 800; color: var(--text-primary); }
.exam-q { background: var(--bg-card-alt); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 16px; }
.exam-qnum { font-size: .72rem; color: var(--accent-blue); font-weight: 700; letter-spacing: .06em; margin-bottom: 8px; }
.exam-q p  { font-size: .88rem; color: var(--text-primary); margin-bottom: 14px; }
.exam-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.eo {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 8px 10px; border-radius: 7px; border: 1px solid var(--border);
  cursor: pointer; transition: var(--trans);
}
.eo:hover { border-color: rgba(59,130,246,.3); }
.eo.eo-sel { background: rgba(59,130,246,.1); border-color: rgba(59,130,246,.4); }
.eo span { width: 22px; height: 22px; border-radius: 5px; background: rgba(255,255,255,.06); display: flex; align-items: center; justify-content: center; font-size: .72rem; font-weight: 700; color: var(--text-muted); flex-shrink: 0; }
.eo.eo-sel span { background: var(--accent-blue); color: #fff; }
.eo p { font-size: .8rem; color: var(--text-secondary); margin: 0; }

/* Dashboard UI */
.dbrd-ui { display: flex; flex-direction: column; gap: 16px; }
.dbrd-welcome { display: flex; justify-content: space-between; align-items: center; font-size: .88rem; color: var(--text-primary); font-weight: 600; }
.dbrd-streak { background: rgba(251,146,60,.1); border: 1px solid rgba(251,146,60,.3); color: #fb923c; padding: 3px 10px; border-radius: 100px; font-size: .76rem; }
.dbrd-cards { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; }
.dbc { border-radius: 10px; padding: 12px; border: 1px solid var(--border); text-align: center; }
.dbc.blue   { background: rgba(59,130,246,.08); border-color: rgba(59,130,246,.2); }
.dbc.green  { background: rgba(16,185,129,.08); border-color: rgba(16,185,129,.2); }
.dbc.purple { background: rgba(139,92,246,.08); border-color: rgba(139,92,246,.2); }
.dbc.cyan   { background: rgba(6,182,212,.08);  border-color: rgba(6,182,212,.2);  }
.dbc-n { font-family: var(--font-head); font-size: 1.2rem; font-weight: 800; }
.dbc-l { font-size: .7rem; color: var(--text-muted); margin-top: 2px; }
.dbc.blue   .dbc-n { color: var(--accent-blue); }
.dbc.green  .dbc-n { color: #10b981; }
.dbc.purple .dbc-n { color: var(--accent-purple); }
.dbc.cyan   .dbc-n { color: var(--accent-cyan); }
.dbrd-chart-area { background: var(--bg-card-alt); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.dbrd-chart-label { font-size: .8rem; color: var(--text-muted); margin-bottom: 12px; }
.dbrd-bars { display: flex; align-items: flex-end; gap: 8px; height: 60px; }
.dbrd-bar {
  flex: 1; border-radius: 4px 4px 0 0;
  background: rgba(59,130,246,.2);
  height: var(--h, 50%);
  position: relative; transition: var(--trans);
}
.dbrd-bar.active { background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan)); }
.dbrd-bar span { position: absolute; bottom: -18px; left: 50%; transform: translateX(-50%); font-size: .65rem; color: var(--text-muted); white-space: nowrap; }

/* ══════════════════════════════════════════════════════════
   FEATURES GRID
══════════════════════════════════════════════════════════ */
.features-section { padding: 100px 0; }

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 32px;
  transition: var(--trans);
  position: relative; overflow: hidden;
}
.feat-card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(59,130,246,.04), transparent);
  opacity: 0; transition: var(--trans);
}
.feat-card:hover {
  transform: translateY(-6px);
  border-color: rgba(59,130,246,.25);
  box-shadow: 0 16px 40px rgba(0,0,0,.3), 0 0 0 1px rgba(59,130,246,.1);
}
.feat-card:hover::before { opacity: 1; }

.fc-icon-wrap {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; transition: var(--trans);
}
.blue-glow   { background: rgba(59,130,246,.1);  border: 1px solid rgba(59,130,246,.2);  }
.cyan-glow   { background: rgba(6,182,212,.1);   border: 1px solid rgba(6,182,212,.2);   }
.purple-glow { background: rgba(139,92,246,.1);  border: 1px solid rgba(139,92,246,.2);  }
.feat-card:hover .blue-glow   { background: rgba(59,130,246,.2);  box-shadow: 0 0 16px rgba(59,130,246,.2);  }
.feat-card:hover .cyan-glow   { background: rgba(6,182,212,.2);   box-shadow: 0 0 16px rgba(6,182,212,.2);   }
.feat-card:hover .purple-glow { background: rgba(139,92,246,.2);  box-shadow: 0 0 16px rgba(139,92,246,.2);  }

.feat-card h3 { margin-bottom: 10px; font-size: 1.05rem; }
.feat-card p  { font-size: .88rem; line-height: 1.65; }
.feat-tag {
  display: inline-block; margin-top: 16px;
  padding: 4px 12px; border-radius: 100px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  font-size: .72rem; font-weight: 600; color: var(--text-muted);
  letter-spacing: .04em;
}

/* ══════════════════════════════════════════════════════════
   HOW IT WORKS
══════════════════════════════════════════════════════════ */
.how-section { padding: 100px 0; background: var(--bg-secondary); }

.steps-row {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  justify-content: center;
}
.step-card {
  flex: 1; min-width: 220px; max-width: 300px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 36px 28px;
  text-align: center; transition: var(--trans);
  position: relative;
}
.step-card:hover { transform: translateY(-6px); border-color: rgba(59,130,246,.25); box-shadow: 0 16px 40px rgba(0,0,0,.3); }

.step-num {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  font-family: var(--font-head); font-size: .72rem; font-weight: 800;
  letter-spacing: .12em; color: var(--accent-blue);
  background: var(--bg-card); padding: 3px 12px;
  border: 1px solid rgba(59,130,246,.3); border-radius: 100px;
}
.step-icon {
  width: 64px; height: 64px; border-radius: 16px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.step-card h3 { margin-bottom: 12px; }
.step-card p  { font-size: .88rem; }

.step-arrow {
  color: var(--accent-blue); flex-shrink: 0;
  opacity: .5;
}

/* ══════════════════════════════════════════════════════════
   STATS
══════════════════════════════════════════════════════════ */
.stats-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(59,130,246,.06), rgba(6,182,212,.04));
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 24px;
}
.stat-item { text-align: center; }
.stat-num  {
  font-family: var(--font-head); font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800; display: block; margin-bottom: 8px;
}
.stat-label { font-size: .9rem; color: var(--text-muted); }

/* ══════════════════════════════════════════════════════════
   TESTIMONIALS
══════════════════════════════════════════════════════════ */
.testimonials-section { padding: 100px 0; }

.testimonials-track { position: relative; overflow: hidden; }

.testi-carousel {
  display: flex; transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.testi-card {
  min-width: 100%; padding: 0 12px; box-sizing: border-box;
}
.testi-card > * { max-width: 780px; margin: 0 auto; }

.testi-card {
  background: transparent;
}
.testi-card > div,
.testi-card > p {
  display: block;
}

.testi-inner-wrap {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 40px;
  max-width: 780px; margin: 0 auto;
}

/* Rebuild testi cards as inner wrap */
.testi-card {
  min-width: 100%;
}

.testi-quote {
  font-size: 4rem; font-family: serif;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  background-clip: text;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: .8; margin-bottom: 16px;
}
.testi-text {
  font-size: 1.05rem; color: var(--text-secondary); line-height: 1.75;
  margin-bottom: 28px; font-style: italic;
}
.testi-author {
  display: flex; align-items: center; gap: 14px;
}
.testi-avatar {
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 800; font-size: .85rem; flex-shrink: 0;
}
.testi-name  { font-weight: 700; font-size: .92rem; color: var(--text-primary); }
.testi-role  { font-size: .8rem; color: var(--text-muted); margin-top: 2px; }
.testi-result {
  margin-left: auto; padding: 4px 14px;
  border-radius: 100px; font-size: .75rem; font-weight: 700;
}
.testi-result.passed { background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.3); color: #10b981; }

.testi-controls {
  display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 32px;
}
.tc-btn {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text-secondary); transition: var(--trans);
}
.tc-btn:hover { background: rgba(255,255,255,.1); color: var(--text-primary); border-color: rgba(255,255,255,.2); }
.tc-dots { display: flex; gap: 8px; }
.tc-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,.15); cursor: pointer; transition: var(--trans);
}
.tc-dot.active {
  background: var(--accent-blue);
  width: 24px; border-radius: 100px;
}

/* ══════════════════════════════════════════════════════════
   FINAL CTA
══════════════════════════════════════════════════════════ */
.cta-section {
  padding: 100px 0; position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(59,130,246,.06) 0%, rgba(139,92,246,.06) 50%, rgba(6,182,212,.04) 100%);
  border-top: 1px solid var(--border);
}
.cta-bg { position: absolute; inset: 0; pointer-events: none; }
.cta-bg .glow-1 {
  width: 400px; height: 400px; top: -100px; left: 10%;
  background: radial-gradient(circle, rgba(59,130,246,.15), transparent 70%);
}
.cta-bg .glow-2 {
  width: 300px; height: 300px; bottom: -50px; right: 15%;
  background: radial-gradient(circle, rgba(139,92,246,.12), transparent 70%);
}
.cta-inner {
  text-align: center; position: relative; z-index: 2;
}
.cta-badge {
  display: inline-block; padding: 5px 16px; border-radius: 100px;
  border: 1px solid rgba(59,130,246,.35); background: rgba(59,130,246,.08);
  color: var(--accent-blue); font-size: .78rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 16px;
}
.cta-inner h2  { margin-bottom: 16px; }
.cta-inner p   { max-width: 520px; margin: 0 auto 36px; font-size: 1.05rem; }
.cta-actions   { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.cta-trust     { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; }
.cta-trust span { font-size: .85rem; color: var(--text-muted); }

/* ══════════════════════════════════════════════════════════
   FAQ
══════════════════════════════════════════════════════════ */
.faq-section { padding: 100px 0; background: var(--bg-secondary); }

.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); overflow: hidden; transition: var(--trans);
}
.faq-item:hover { border-color: rgba(59,130,246,.2); }

.faq-question {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  width: 100%; padding: 20px 24px;
  background: none; border: none; cursor: pointer;
  text-align: left; color: var(--text-primary);
  font-family: var(--font-head); font-weight: 600; font-size: .95rem;
  transition: var(--trans);
}
.faq-question:hover { color: var(--accent-blue); }
.faq-chevron { flex-shrink: 0; transition: transform .25s ease; }
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-item.open { border-color: rgba(59,130,246,.25); background: rgba(59,130,246,.03); }

.faq-answer {
  height: 0; overflow: hidden; transition: height .3s ease;
}
.faq-answer p { padding: 0 24px 20px; font-size: .9rem; line-height: 1.7; }

/* ══════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card-alt);
  padding-top: 64px;
}
.footer-inner {
  display: grid; grid-template-columns: 320px 1fr;
  gap: 64px; padding-bottom: 48px;
}
.footer-brand p { font-size: .88rem; margin: 16px 0 24px; max-width: 280px; }
.footer-logo { margin-bottom: 4px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(255,255,255,.05); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: var(--trans); text-decoration: none;
}
.footer-social a:hover { background: rgba(59,130,246,.12); border-color: rgba(59,130,246,.3); color: var(--accent-blue); }

.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 32px; }
.fl-col h4 { font-family: var(--font-head); font-size: .85rem; font-weight: 700; color: var(--text-primary); letter-spacing: .04em; text-transform: uppercase; margin-bottom: 16px; }
.fl-col a {
  display: block; font-size: .88rem; color: var(--text-muted);
  text-decoration: none; margin-bottom: 10px; transition: var(--trans);
}
.fl-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--border); padding: 18px 0;
}
.footer-bottom .container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px;
  font-size: .82rem; color: var(--text-muted);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-inner     { grid-template-columns: 1fr; gap: 48px; }
  .hero-right     { display: none; }
  .features-grid  { grid-template-columns: repeat(2,1fr); }
  .compare-grid   { grid-template-columns: 1fr; }
  .compare-vs     { display: none; }
  .stats-grid     { grid-template-columns: repeat(2,1fr); gap: 32px; }
  .footer-inner   { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.75rem; }

  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; inset: 0; top: 65px;
    background: rgba(11,16,32,.97); backdrop-filter: blur(20px);
    justify-content: flex-start; align-items: center;
    gap: 0; padding-top: 40px;
    z-index: 999;
  }
  .nav-links.open li { width: 100%; text-align: center; }
  .nav-links.open a { display: block; padding: 18px; font-size: 1.1rem; border-bottom: 1px solid var(--border); }
  .nav-links.open ~ .nav-cta { display: none; }

  .hero { padding: 100px 0 60px; }
  .hero-trust { flex-wrap: wrap; gap: 12px; }
  .trust-div { display: none; }

  .features-grid { grid-template-columns: 1fr; }
  .stats-grid    { grid-template-columns: repeat(2,1fr); }

  .steps-row { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .step-card  { max-width: 100%; width: 100%; }

  .footer-links { grid-template-columns: repeat(2,1fr); }

  .study-ui { grid-template-columns: 1fr; }
  .sui-sidebar { display: none; }

  .dbrd-cards { grid-template-columns: repeat(2,1fr); }
  .exam-opts  { grid-template-columns: 1fr; }
  .exam-progress-row { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 480px) {
  .section-header { margin-bottom: 40px; }
  .compare-card   { padding: 24px; }
  .feat-card      { padding: 24px; }
  .step-card      { padding: 28px 20px; }
  .footer-links   { grid-template-columns: 1fr; }
  .stats-grid     { grid-template-columns: 1fr 1fr; }
  .trust-stats    { gap: 20px; }
  .ts-sep         { display: none; }
  .hero-actions   { flex-direction: column; align-items: flex-start; }
  .cta-actions    { flex-direction: column; }
}