/* প্রস্তুতি AI — Main Stylesheet v1.0 */

/* ===== DESIGN TOKENS ===== */
:root {
  --color-bg:          #0A0F1E;
  --color-surface:     #141929;
  --color-surface-2:   #1E2740;
  --color-border:      #2A3350;
  --color-accent-gold: #F5C518;
  --color-accent-blue: #4A90D9;
  --color-text-primary:#F0F0F0;
  --color-text-muted:  #8A93A8;
  --color-success:     #22C55E;
  --color-danger:      #EF4444;
  --color-warning:     #F59E0B;
  --color-bkash:       #E2136E;
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-full:9999px;
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.4);
  --shadow-gold:0 0 20px rgba(245,197,24,0.15);
  --font-display: 'Hind Siliguri', sans-serif;
  --font-body:    'Hind Siliguri', 'Inter', sans-serif;
  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
}
h1,h2,h3 { font-family: var(--font-display); line-height: 1.3; }
h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 1.8rem; font-weight: 600; }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { line-height: 1.7; }
a  { color: var(--color-accent-gold); text-decoration: none; transition: var(--transition); }
a:hover { opacity: 0.85; }
ul { list-style: none; }
img { max-width: 100%; }

/* ===== LAYOUT ===== */
.ep-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== UTILITIES ===== */
.ep-gold { color: var(--color-accent-gold); }
.ep-blue { color: var(--color-accent-blue); }
.ep-muted { color: var(--color-text-muted); }

/* ===== ANIMATIONS ===== */
@keyframes ep-blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
@keyframes ep-fade-up { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
@keyframes ep-float { 0%,100% { transform:translateY(0); } 50% { transform:translateY(-10px); } }
@keyframes ep-pulse-gold { 0%,100% { box-shadow:0 0 0 0 rgba(245,197,24,0.4); } 70% { box-shadow:0 0 0 10px rgba(245,197,24,0); } }
@keyframes ep-count-up { from { opacity:0; transform:scale(0.8); } to { opacity:1; transform:scale(1); } }

.ep-blink-cursor { animation: ep-blink 0.7s steps(1) infinite; color: var(--color-accent-gold); font-weight: 300; }
.ep-reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.ep-reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== NAVBAR ===== */
.ep-navbar {
  position: sticky; top: 0; z-index: 200;
  background: rgba(10,15,30,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.ep-navbar.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.5); }
.ep-navbar__inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px; height: 68px;
  display: flex; align-items: center; justify-content: space-between;
}
.ep-navbar__logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-size: 1.3rem; font-weight: 700;
  color: var(--color-accent-gold); text-decoration: none;
}
.ep-navbar__logo svg { flex-shrink: 0; }
.ep-navbar__nav { display: flex; align-items: center; gap: 28px; }
.ep-navbar__nav a { color: var(--color-text-primary); font-size: 0.95rem; font-weight: 500; }
.ep-navlink-icon { display: none; }
.ep-navbar__nav a:hover { color: var(--color-accent-gold); }
.ep-navbar__actions { display: flex; align-items: center; gap: 12px; }
.ep-navbar__actions .ep-navbar__mobile-cta { display: none; }
.ep-navbar__hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
  min-height: 44px; min-width: 44px; align-items: center; justify-content: center;
}
.ep-navbar__hamburger span { display: block; width: 24px; height: 2px; background: var(--color-text-primary); border-radius: 2px; transition: var(--transition); }

/* ===== BUTTONS ===== */
.ep-btn {
  display: inline-block; padding: 11px 24px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 0.95rem;
  cursor: pointer; border: none; transition: var(--transition);
  text-align: center; line-height: 1.4; font-family: var(--font-body);
  min-height: 44px;
}
.ep-btn--lg { padding: 14px 32px; font-size: 1rem; border-radius: var(--radius-md); }
.ep-btn--full { width: 100%; display: block; }
.ep-btn--primary { background: var(--color-accent-gold); color: #0A0F1E; }
.ep-btn--primary:hover { filter: brightness(1.1); transform: scale(1.02); color: #0A0F1E; }
.ep-btn--outline { background: transparent; border: 2px solid var(--color-accent-gold); color: var(--color-accent-gold); }
.ep-btn--outline:hover { background: var(--color-accent-gold); color: #0A0F1E; }
.ep-btn--dark { background: #0A0F1E; color: var(--color-accent-gold); border: 2px solid #0A0F1E; }
.ep-btn--dark:hover { background: #141929; color: var(--color-accent-gold); }
.ep-btn--danger { background: var(--color-danger); color: #fff; }
.ep-btn--ghost { background: none; border: none; color: var(--color-text-muted); }
.ep-btn--ghost:hover { background: var(--color-surface); color: var(--color-text-primary); }
*:focus-visible { outline: 2px solid var(--color-accent-gold); outline-offset: 3px; }

/* ===== CARDS ===== */
.ep-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 24px; box-shadow: var(--shadow-sm); }
.ep-card--hover { transition: transform var(--transition), box-shadow var(--transition); }
.ep-card--hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-gold); }
.ep-card--gold { border-left: 3px solid var(--color-accent-gold); }

/* ===== SECTION HEADER ===== */
.ep-section-header { text-align: center; margin-bottom: 56px; }
.ep-section-header h2 { margin-bottom: 8px; }
.ep-section-header p { color: var(--color-text-muted); font-size: 1rem; }

/* ===== HERO ===== */
.ep-hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  overflow: hidden;
  padding: 80px 0 60px;
}
.ep-particles { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.ep-hero__grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.ep-hero__headline { font-size: 3rem; line-height: 1.2; margin-bottom: 20px; }
.ep-hero__sub { font-size: 1.1rem; color: var(--color-text-muted); margin-bottom: 20px; max-width: 500px; }
.ep-hero__typing-wrap { font-size: 1.05rem; color: var(--color-text-muted); margin-bottom: 36px; min-height: 1.6em; }
#ep-typing { font-weight: 700; font-family: var(--font-display); }
.ep-hero__ctas { display: flex; gap: 16px; flex-wrap: wrap; }

/* MCQ Mockup Illustration */
.ep-hero__illustration { display: flex; justify-content: center; align-items: center; }
.ep-mcq-mockup {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%; max-width: 380px;
  box-shadow: var(--shadow-md), var(--shadow-gold);
  animation: ep-float 4s ease-in-out infinite;
}
.ep-mcq-mockup__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.ep-mcq-mockup__badge { background: var(--color-accent-gold); color: #0A0F1E; font-size: 0.8rem; font-weight: 700; padding: 4px 12px; border-radius: var(--radius-full); }
.ep-mcq-mockup__timer { color: var(--color-text-muted); font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.ep-mcq-mockup__q { font-size: 0.95rem; line-height: 1.6; margin-bottom: 20px; font-family: var(--font-display); color: var(--color-text-primary); }
.ep-mcq-mockup__opts { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.ep-mcq-opt {
  padding: 10px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: 0.88rem; color: var(--color-text-muted);
  transition: var(--transition); cursor: default;
}
.ep-mcq-opt--sel {
  border-color: var(--color-accent-gold);
  background: rgba(245,197,24,0.1);
  color: var(--color-accent-gold); font-weight: 600;
}
.ep-mcq-mockup__progress { height: 4px; background: var(--color-border); border-radius: 4px; margin-bottom: 12px; }
.ep-mcq-mockup__fill { height: 100%; background: var(--color-accent-gold); border-radius: 4px; transition: width 1s ease; }
.ep-mcq-mockup__ai-badge { font-size: 0.8rem; color: var(--color-text-muted); text-align: center; }

/* ===== HERO MOCKUP: LIVE DEMO STATES ===== */
.ep-mcq-mockup__inner { transition: opacity .28s ease; }
.ep-mcq-mockup__inner.ep-mcq-fading { opacity: 0; }
.ep-mcq-mockup__timer.ep-mcq-urgent {
  color: #F87171; font-weight: 700;
  animation: ep-mcq-pulse 1s ease-in-out infinite;
}
@keyframes ep-mcq-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }
.ep-mcq-opt.ep-mcq-opt--picking {
  animation: ep-mcq-pick .5s ease;
}
@keyframes ep-mcq-pick {
  0% { transform: scale(1); }
  40% { transform: scale(1.03); border-color: var(--color-accent-gold); }
  100% { transform: scale(1); }
}
.ep-mcq-mockup__footer { display: flex; align-items: center; justify-content: center; min-height: 22px; }
.ep-mcq-submit-btn {
  background: var(--color-accent-gold); color: #0A0F1E;
  border: none; font-family: var(--font-display); font-weight: 700;
  font-size: 0.85rem; padding: 8px 22px; border-radius: var(--radius-full);
  cursor: default; opacity: 0; transform: translateY(6px);
  animation: ep-mcq-submit-in .35s ease forwards;
}
@keyframes ep-mcq-submit-in { to { opacity: 1; transform: translateY(0); } }
.ep-mcq-submit-btn.ep-mcq-submit-clicked { animation: ep-mcq-submit-click .25s ease; }
@keyframes ep-mcq-submit-click { 50% { transform: scale(.94); } }

.ep-mcq-result { text-align: center; padding: 8px 0 4px; }
.ep-mcq-result__score {
  font-family: var(--font-display); font-weight: 700;
  font-size: 2.6rem; color: var(--color-accent-gold); line-height: 1;
  margin-bottom: 4px;
}
.ep-mcq-result__count { color: var(--color-text-muted); font-size: 0.88rem; margin-bottom: 16px; }
.ep-mcq-result__ai {
  background: rgba(245,197,24,0.06); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 12px 14px; text-align: left;
}
.ep-mcq-result__ai-badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  color: var(--color-accent-gold); margin-bottom: 6px;
}
.ep-mcq-result__ai p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.6; margin: 0; }

.ep-mcq-result__wrong {
  text-align: left; margin-top: 4px;
  border-left: 3px solid #F87171; padding-left: 12px;
}
.ep-mcq-result__wrong-label {
  font-size: 0.85rem; font-weight: 600; color: var(--color-text-primary);
  margin-bottom: 6px; line-height: 1.5;
}
.ep-mcq-result__wrong-ans {
  font-size: 0.78rem; color: var(--color-text-muted); margin-bottom: 10px;
}
.ep-mcq-result__wrong-ans s { opacity: .7; }
.ep-mcq-result__wrong-ans b { color: var(--color-text-primary); }
.ep-mcq-cursor {
  display: inline-block; width: 2px; height: 1em; background: var(--color-accent-gold);
  animation: ep-mcq-blink .7s infinite; vertical-align: text-bottom;
}
@keyframes ep-mcq-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ===== STATS ===== */
.ep-stats {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}
.ep-stats__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; }
.ep-stat { text-align: center; padding: 16px 32px; }
.ep-stat + .ep-stat { border-left: 1px solid var(--color-border); }
.ep-stat__number { display: block; font-size: 2.8rem; font-weight: 700; font-family: var(--font-display); }
.ep-stat__label { display: block; color: var(--color-text-muted); font-size: 1rem; margin-top: 4px; }

/* ===== HOW IT WORKS ===== */
.ep-how { padding: 96px 0; }
.ep-how__steps {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 0;
}
.ep-how__step { text-align: center; flex: 1; max-width: 220px; padding: 0 12px; }
.ep-how__step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-accent-gold); color: #0A0F1E;
  font-size: 1.3rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}
.ep-how__step-icon { margin-bottom: 14px; }
.ep-how__step h3 { margin-bottom: 8px; font-size: 1.05rem; }
.ep-how__step p { font-size: 0.88rem; color: var(--color-text-muted); }
.ep-how__connector {
  flex: 0 0 40px; height: 2px;
  background: linear-gradient(90deg, var(--color-border), var(--color-accent-gold), var(--color-border));
  align-self: center; margin-top: -40px;
}

/* ===== FEATURES ===== */
.ep-features { padding: 96px 0; background: var(--color-surface); }
.ep-features__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.ep-feature-card { text-align: center; }
.ep-feature-card__icon { margin-bottom: 16px; }
.ep-feature-card h3 { margin-bottom: 10px; }
.ep-feature-card p { color: var(--color-text-muted); font-size: 0.9rem; }

/* ===== SUBJECTS ===== */
.ep-subjects { padding: 80px 0; }
.ep-subjects__scroll { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.ep-subject-pill {
  padding: 10px 22px; border-radius: var(--radius-full);
  background: var(--color-surface); border: 1px solid var(--color-accent-gold);
  color: var(--color-text-primary); font-size: 0.9rem; font-family: var(--font-display);
  cursor: default; transition: var(--transition);
}
.ep-subject-pill:hover { background: var(--color-accent-gold); color: #0A0F1E; font-weight: 600; }

/* ===== PRICING ===== */
.ep-pricing { padding: 96px 0; background: var(--color-surface); }
.ep-pricing__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; max-width: 800px; margin: 0 auto; }
.ep-pricing-card { position: relative; }
.ep-pricing-card--featured {
  border-color: var(--color-accent-gold);
  box-shadow: var(--shadow-gold);
}
.ep-pricing-card__popular {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--color-accent-gold); color: #0A0F1E;
  font-size: 0.78rem; font-weight: 700; padding: 4px 16px; border-radius: var(--radius-full);
  white-space: nowrap;
}
.ep-pricing-card__label { color: var(--color-text-muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.ep-pricing-card__price { margin-bottom: 24px; }
.ep-pricing-card__amount { font-size: 2.2rem; font-weight: 700; font-family: var(--font-display); color: var(--color-accent-gold); }
.ep-pricing-card__features { margin-bottom: 28px; display: flex; flex-direction: column; gap: 10px; }
.ep-pricing-card__features li { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.ep-pricing-card__features li::before { content: '\2713'; color: var(--color-success); font-weight: 700; flex-shrink: 0; }
.ep-pricing-card__features li.ep-pricing-card__no { color: var(--color-text-muted); }
.ep-pricing-card__features li.ep-pricing-card__no::before { content: '\00D7'; color: var(--color-text-muted); }
.ep-pricing-card__note { text-align: center; font-size: 0.8rem; color: var(--color-text-muted); margin-top: 12px; }

/* ===== PRICING FULL GRID (pricing page) ===== */
.ep-pricing__full-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; align-items: stretch; }
.ep-pricing__full-grid .ep-pricing-card { display: flex; flex-direction: column; }
.ep-pricing__full-grid .ep-pricing-card__features { flex: 1; }

/* ===== SIMPLE PAGE HEADER (features / pricing) ===== */
.ep-page-header { padding: 140px 0 56px; text-align: center; }
.ep-page-header h1 { font-size: 2.4rem; margin-bottom: 12px; }
.ep-page-header p { color: var(--color-text-muted); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.ep-features__grid--3 { grid-template-columns: repeat(3,1fr); }

/* ===== FEATURES: CATEGORIZED PREVIEW ===== */
.ep-features__categories { display: flex; flex-direction: column; gap: 48px; margin-bottom: 40px; }
.ep-features__category-title { text-align: center; color: var(--color-accent-gold); font-size: 1.05rem; margin-bottom: 24px; }
.ep-features__grid--2 { grid-template-columns: repeat(2,1fr); }
.ep-features__cta { text-align: center; }

/* ===== PRICING TEASER ===== */
.ep-pricing__teaser { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; max-width: 800px; margin: 0 auto 40px; }
.ep-pricing__teaser-col { text-align: center; }
.ep-pricing__teaser-col .ep-pricing-card__amount { font-size: 1.8rem; font-weight: 700; font-family: var(--font-display); color: var(--color-accent-gold); margin: 8px 0 12px; }

/* ===== CTA BANNER ===== */
.ep-cta-banner {
  background: linear-gradient(135deg, #F5C518 0%, #e6a800 100%);
  padding: 80px 24px; text-align: center;
}
.ep-cta-banner h2 { color: #0A0F1E; font-size: 2.2rem; margin-bottom: 12px; }
.ep-cta-banner p { color: rgba(10,15,30,0.75); font-size: 1rem; margin-bottom: 32px; }

/* ===== FOOTER ===== */
.ep-footer { background: var(--color-surface); border-top: 1px solid var(--color-border); padding: 56px 24px; }
.ep-footer__inner { max-width: 1200px; margin: 0 auto; text-align: center; }
.ep-footer__logo { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--color-accent-gold); display: block; margin-bottom: 8px; }
.ep-footer__brand p { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.ep-footer__links { display: flex; justify-content: center; gap: 28px; margin-bottom: 20px; }
.ep-footer__links a { color: var(--color-text-muted); font-size: 0.9rem; }
.ep-footer__links a:hover { color: var(--color-accent-gold); }
.ep-footer__love, .ep-footer__copy { color: var(--color-text-muted); font-size: 0.82rem; margin-top: 6px; }

/* ===== AUTH PAGES ===== */
.ep-auth-page { min-height: 85vh; display: flex; align-items: center; justify-content: center; padding: 20px 24px; }
.ep-auth-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px 32px; max-width: 440px; width: 100%; }
.ep-auth-card h1 { font-size: 1.6rem; margin: 0 0 4px; }
.ep-auth-logo { display: block; font-weight: 800; font-size: 1.3rem; color: var(--color-accent-gold); text-decoration: none; margin-bottom: 10px; }
.ep-auth-sub { color: var(--color-text-muted); margin: 2px 0 10px; font-size: 0.9rem; }
.ep-auth-trial { color: var(--color-accent-gold); font-size: 0.85rem; font-weight: 600; margin: 0 0 14px; }
.ep-auth-alt { margin-top: 12px; text-align: center; font-size: 0.9rem; color: var(--color-text-muted); }
.ep-auth-alt a { color: var(--color-accent-gold); text-decoration: none; }
.ep-form { max-width: 100%; }
.ep-form-row { margin-bottom: 12px; }
.ep-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
@media (max-width: 480px) { .ep-form-grid { grid-template-columns: 1fr; } }
.ep-form-row label { display: block; font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 6px; }
.ep-form-row input:not([type="checkbox"]), .ep-form-row select, .ep-form-row textarea {
  width: 100%; box-sizing: border-box;
  background: var(--color-bg); border: 1.5px solid var(--color-border); color: var(--color-text-primary);
  padding: 10px 14px; border-radius: 8px; font-size: 0.95rem; transition: border-color 0.2s;
}
.ep-form-row input:focus, .ep-form-row select:focus { border-color: var(--color-accent-gold); outline: none; }
.ep-remember-row { display: flex; align-items: center; justify-content: space-between; margin-top: -4px; }
.ep-check-label { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--color-text-muted); cursor: pointer; }
.ep-check-label input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--color-accent-gold); flex-shrink: 0; cursor: pointer; }
.ep-forgot { font-size: 0.85rem; color: var(--color-accent-gold); text-decoration: none; }
.ep-msg { padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; font-size: 0.9rem; }
.ep-msg.ok { background: rgba(34,197,94,.1); color: #22C55E; border: 1px solid rgba(34,197,94,.2); }
.ep-msg.err { background: rgba(239,68,68,.1); color: #EF4444; border: 1px solid rgba(239,68,68,.2); }
.ep-checkbox-list { display: flex; flex-direction: column; gap: 8px; max-height: 220px; overflow-y: auto; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: 8px; padding: 12px; }
.ep-checkbox-item { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--color-text-primary); cursor: pointer; }
.ep-checkbox-item input { accent-color: var(--color-accent-gold); }

/* Unit picker on registration page — selectable row cards */
.ep-unit-picker-list { display: flex; flex-direction: column; gap: 10px; max-height: 260px; overflow-y: auto; padding: 2px; }
.ep-unit-picker-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--color-surface-2); border: 2px solid var(--color-border); border-radius: var(--radius-md); padding: 14px 16px; cursor: pointer; transition: border-color .2s, background .2s; }
.ep-unit-picker-row:hover { border-color: var(--color-accent-gold); }
.ep-unit-picker-row.selected { border-color: var(--color-accent-gold); background: rgba(245,197,24,.08); }
.ep-unit-picker-row input { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.ep-unit-picker-row-name { font-weight: 700; color: var(--color-text-primary); font-size: .92rem; line-height: 1.3; }
.ep-unit-picker-sub-en { display: block; font-size: .75rem; color: var(--color-text-muted); font-weight: 400; margin-top: 2px; }
.ep-unit-picker-check { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--color-border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; transition: all .2s; color: transparent; font-size: .75rem; }
.ep-unit-picker-row.selected .ep-unit-picker-check { border-color: var(--color-accent-gold); background: var(--color-accent-gold); color: var(--color-bg); }


/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .ep-features__grid { grid-template-columns: repeat(2,1fr); }
  .ep-features__grid--2 { grid-template-columns: 1fr; }
  .ep-pricing__full-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.4rem; }
  .ep-navbar__actions .ep-navbar__mobile-cta {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 8px 14px; font-size: 0.85rem; min-height: 40px;
  }
  .ep-hero { min-height: auto; padding: 60px 0 48px; }
  .ep-hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .ep-hero__headline { font-size: 2rem; }
  .ep-hero__illustration { order: -1; }
  .ep-mcq-mockup { max-width: 320px; }
  .ep-stats__grid { grid-template-columns: 1fr; }
  .ep-stat + .ep-stat { border-left: none; border-top: 1px solid var(--color-border); }
  .ep-how__steps { flex-direction: column; align-items: center; gap: 24px; }
  .ep-how__connector { width: 2px; height: 32px; flex: 0; background: linear-gradient(180deg, var(--color-border), var(--color-accent-gold), var(--color-border)); margin: 0; }
  .ep-how__step { max-width: 100%; }
  .ep-features__grid { grid-template-columns: 1fr; }
  .ep-pricing__teaser { grid-template-columns: 1fr; }
  .ep-pricing__full-grid { grid-template-columns: 1fr; }
  .ep-hero__ctas { flex-direction: column; }
  .ep-hero__ctas .ep-btn { width: 100%; text-align: center; }
  .ep-section-header { margin-bottom: 36px; }
  .ep-how, .ep-features, .ep-subjects, .ep-pricing { padding: 64px 0; }
  .ep-features__categories { gap: 32px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ===== NAVBAR ACTIVE STATE ===== */
.ep-navbar__nav .ep-nav-active {
    color: var(--color-accent-gold) !important;
    font-weight: 700;
}
.ep-navbar__nav .ep-nav-active::after {
    content: '';
    display: block;
    height: 2px;
    background: var(--color-accent-gold);
    border-radius: 2px;
    margin-top: 2px;
}

/* ===== MOBILE NAV ===== */
@media (max-width: 768px) {
  .ep-navbar__hamburger { display: flex; }
  .ep-navbar__nav {
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    z-index: 199;
  }
  .ep-navbar__nav.open { display: flex; }
  .ep-navbar__nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .ep-navbar__nav a:last-child { border-bottom: none; }
  .ep-navbar__nav a.ep-btn {
    background: none; border: none; color: var(--color-text-primary);
    padding: 12px 0; min-height: auto; font-weight: 500; text-align: left;
    border-radius: 0;
  }
  .ep-navlink-icon {
    display: flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; flex-shrink: 0;
    border-radius: 8px; background: rgba(245,197,24,.08);
    padding: 6px; color: var(--color-accent-gold);
  }
  .ep-navlink-icon svg { width: 100%; height: 100%; display: block; }
}

/* ===== PAGE FADE IN ===== */
.ep-exam-page, .ep-dashboard-page, .ep-auth-page, .ep-payment-page {
    animation: ep-page-in 0.35s ease both;
}
@keyframes ep-page-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}