/* ─── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:       #4f46e5;
  --primary-dark:  #3730a3;
  --primary-light: #818cf8;
  --dark:          #0f172a;
  --text:          #1e293b;
  --text-muted:    #64748b;
  --bg:            #ffffff;
  --bg-light:      #f8fafc;
  --border:        #e2e8f0;
  --accent:        #fdd130;
  --success:       #10b981;
  --radius:        12px;
  --shadow:        0 4px 24px rgba(15,23,42,.08);
  --shadow-lg:     0 12px 48px rgba(15,23,42,.14);
  --transition:    .2s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a   { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ─── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px; font-weight: 600;
  font-size: .95rem; cursor: pointer; border: 2px solid transparent;
  transition: var(--transition); text-decoration: none; font-family: inherit;
}
.btn-primary  { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-outline  { border-color: rgba(255,255,255,.3); color: #fff; background: transparent; }
.btn-outline:hover { border-color: #fff; text-decoration: none; }
.btn-white    { background: #fff; color: var(--primary); }
.btn-white:hover { background: #f0f0ff; text-decoration: none; }
.btn-accent   { background: var(--accent); color: var(--dark); }
.btn-accent:hover { background: #f5c800; text-decoration: none; }
.btn-dark     { border-color: var(--border); color: var(--text); background: transparent; }
.btn-dark:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-lg       { padding: 16px 36px; font-size: 1.05rem; }
.btn.loading  { opacity: .7; pointer-events: none; }
.btn.loading::after {
  content: '';
  width: 16px; height: 16px;
  border: 2px solid currentColor; border-top-color: transparent;
  border-radius: 50%; animation: spin .7s linear infinite; margin-left: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Nav ─────────────────────────────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.nav-logo {
  font-size: 1.4rem; font-weight: 800; color: var(--dark);
  letter-spacing: -.5px; text-decoration: none;
}
.nav-logo span { color: var(--primary); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  font-size: .9rem; font-weight: 500; color: var(--text-muted);
  text-decoration: none; transition: var(--transition);
}
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.nav-actions .btn { padding: 10px 20px; font-size: .88rem; }
.nav-actions .btn-primary { border-color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }

/* ─── Hero ────────────────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 55%, #0f172a 100%);
  color: #fff; padding: 96px 0 80px; overflow: hidden; position: relative;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 65% 50%, rgba(79,70,229,.22) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; position: relative;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(79,70,229,.2); border: 1px solid rgba(129,140,248,.3);
  border-radius: 100px; padding: 6px 14px; font-size: .82rem;
  color: #c7d2fe; font-weight: 600; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800;
  line-height: 1.15; letter-spacing: -.5px; margin-bottom: 20px;
}
.hero h1 .accent { color: var(--accent); }
.hero-sub { font-size: 1.1rem; color: #94a3b8; max-width: 480px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-trust {
  display: flex; align-items: center; gap: 12px;
  margin-top: 40px; font-size: .85rem; color: #64748b;
}
.hero-trust-dots { display: flex; }
.hero-trust-dots i {
  width: 30px; height: 30px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: 2px solid #0f172a; margin-right: -8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .65rem; font-weight: 800; color: #fff; font-style: normal;
}

/* Phone mockup image */
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.phones-mockup { width: 100%; max-width: 460px; height: auto; }

/* ─── Stats ──────────────────────────────────────────────────────────────────── */
.stats { border-bottom: 1px solid var(--border); padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-number { font-size: 2.2rem; font-weight: 800; color: var(--primary); letter-spacing: -.5px; }
.stat-label  { font-size: .88rem; color: var(--text-muted); margin-top: 4px; }

/* ─── Sections ───────────────────────────────────────────────────────────────── */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block; background: #ede9fe; color: var(--primary);
  font-size: .8rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; padding: 6px 14px; border-radius: 100px; margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.5rem); font-weight: 800;
  color: var(--dark); letter-spacing: -.5px; margin-bottom: 16px;
}
.section-header p { color: var(--text-muted); font-size: 1.05rem; }

/* ─── Features ───────────────────────────────────────────────────────────────── */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; transition: var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-lg); border-color: var(--primary-light); transform: translateY(-2px);
}
.feature-icon {
  width: 52px; height: 52px; border-radius: 12px; background: #ede9fe;
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.feature-icon svg { width: 24px; height: 24px; stroke: var(--primary); }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.feature-card p  { font-size: .9rem; color: var(--text-muted); }

/* ─── How it works ───────────────────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.step  { text-align: center; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--primary); color: #fff;
  font-size: 1.3rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 20px;
}
.step h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; color: var(--dark); }
.step p  { font-size: .9rem; color: var(--text-muted); }

/* ─── Pricing ─────────────────────────────────────────────────────────────────── */
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; align-items: start; max-width: 820px; margin: 0 auto; }
.pricing-card {
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: 36px; background: var(--bg); position: relative;
}
.pricing-card.featured { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79,70,229,.1); }
.pricing-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff;
  font-size: .78rem; font-weight: 700; padding: 4px 14px; border-radius: 100px;
  white-space: nowrap;
}
.plan-name  { font-size: .85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 12px; }
.plan-price { font-size: 2.6rem; font-weight: 800; color: var(--dark); letter-spacing: -1px; }
.plan-price span { font-size: 1rem; color: var(--text-muted); font-weight: 400; }
.plan-desc  { font-size: .88rem; color: var(--text-muted); margin: 12px 0 28px; }
.plan-features { list-style: none; margin-bottom: 32px; }
.plan-features li {
  display: flex; align-items: center; gap: 10px;
  font-size: .9rem; color: var(--text); padding: 9px 0;
  border-bottom: 1px solid var(--bg-light);
}
.plan-features li:last-child { border-bottom: none; }
.check { color: var(--success); font-weight: 900; flex-shrink: 0; }
.plan-btn { display: block; text-align: center; }

/* ─── Registration ───────────────────────────────────────────────────────────── */
#registrace {
  background: linear-gradient(135deg, var(--dark) 0%, #1e1b4b 100%);
  padding: 88px 0;
}
#registrace .section-tag { background: rgba(255,255,255,.1); color: #c7d2fe; }
#registrace .section-header h2 { color: #fff; }
#registrace .section-header p  { color: #94a3b8; }

.reg-card {
  background: #fff; border-radius: 20px; padding: 48px;
  max-width: 720px; margin: 0 auto; box-shadow: var(--shadow-lg);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: .88rem; font-weight: 600; color: var(--text); }
.form-group input, .form-group select {
  padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: .95rem; font-family: inherit; color: var(--text);
  transition: var(--transition); background: var(--bg-light);
}
.form-group input:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.form-group input.invalid { border-color: #ef4444; }
.hint { font-size: .8rem; color: var(--text-muted); }
.field-error { font-size: .8rem; color: #ef4444; display: none; }
.field-error.show { display: block; }

.form-checkbox {
  display: flex; align-items: flex-start; gap: 10px;
  margin: 8px 0 28px; font-size: .88rem; color: var(--text-muted); cursor: pointer;
}
.form-checkbox input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--primary); flex-shrink: 0; }

/* ─── Registration step indicator ───────────────────────────────────────────── */
.reg-steps {
  display: flex; align-items: center; gap: 8px; margin-bottom: 28px;
}
.reg-step {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; font-weight: 500; color: var(--text-muted); white-space: nowrap;
}
.reg-step span {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  background: var(--border); color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: .78rem; font-weight: 700;
}
.reg-step.active { color: var(--primary); }
.reg-step.active span { background: var(--primary); color: #fff; }
.reg-step.done span { background: var(--success); color: #fff; }
.reg-step-sep { flex: 1; height: 1px; background: var(--border); min-width: 12px; }

.reg-lead { color: var(--text-muted); font-size: .95rem; margin-bottom: 24px; }

/* ─── Success state ──────────────────────────────────────────────────────────── */
.reg-success-icon {
  width: 64px; height: 64px; border-radius: 50%;
  background: #d1fae5; color: #065f46;
  font-size: 1.8rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.reg-success-title { text-align: center; font-size: 1.4rem; font-weight: 700; color: var(--dark); margin: 0 0 12px; }
.reg-success-text  { text-align: center; color: var(--text-muted); margin: 0 0 6px; line-height: 1.7; }
.reg-success-hint  { text-align: center; font-size: .82rem; color: var(--text-muted); margin: 0 0 28px; }
.reg-success-steps { display: flex; flex-direction: column; gap: 14px; }
.reg-sst {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 16px; background: var(--bg-light); border-radius: 10px; border: 1px solid var(--border);
}
.reg-sst span {
  font-size: 1.1rem; line-height: 1; flex-shrink: 0; padding-top: 2px;
}
.reg-sst div { font-size: .92rem; color: var(--text); }
.reg-sst strong { color: var(--dark); }
.reg-sst em { font-style: normal; color: var(--primary); }

.form-divider {
  border: none; border-top: 1px solid var(--border);
  margin: 24px 0 20px;
}
.form-submit { display: flex; width: 100%; justify-content: center; }

.form-message {
  padding: 16px 20px; border-radius: 10px; font-size: .92rem;
  font-weight: 500; margin-top: 20px; display: none; gap: 10px; align-items: flex-start;
}
.form-message.success { background: #d1fae5; color: #065f46; display: flex; }
.form-message.error   { background: #fee2e2; color: #991b1b; display: flex; }

/* ─── Footer ──────────────────────────────────────────────────────────────────── */
footer { background: var(--dark); color: #94a3b8; padding: 56px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: 12px; display: block; }
.footer-brand p { font-size: .88rem; max-width: 280px; }
.footer-col h4 { font-weight: 700; color: #fff; margin-bottom: 16px; font-size: .9rem; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a  { color: #94a3b8; font-size: .88rem; transition: var(--transition); }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-bottom {
  border-top: 1px solid #1e293b; padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; font-size: .82rem;
}

/* ─── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner    { grid-template-columns: 1fr; }
  .hero-visual   { display: none; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .steps         { grid-template-columns: 1fr; gap: 32px; }
  .pricing-grid  { grid-template-columns: 1fr; max-width: 420px; }
  .stats-grid    { grid-template-columns: 1fr 1fr; }
  .footer-grid   { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .nav-links   { display: none; }
  .nav-toggle  { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .hero        { padding: 64px 0 56px; }
  .section     { padding: 60px 0; }
  .reg-card    { padding: 28px 20px; }
  .form-grid   { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}