@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/fira-sans-latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/fira-sans-latin-500-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/fira-sans-latin-600-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/fira-sans-latin-700-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/latin-500-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/latin-600-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/latin-700-normal.woff2') format('woff2');
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1E3A5F;
  --primary-hover: #172E4D;
  --primary-light: #F0FDFA;
  --accent: #34D399;
  --accent-dark: #0F766E;
  --accent-deeper: #115E59;
  --bg: #FFFFFF;
  --surface: #F9FAFB;
  --card: #FFFFFF;
  --border: #F3F4F6;
  --border-strong: #E5E7EB;
  --text: #111827;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --error: #EF4444;
  --warning: #F59E0B;
  --radius: 16px;
}

body {
  font-family: 'Fira Sans', sans-serif;
  font-size: 16px;
  background: var(--surface);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
nav {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}
.logo {
  font-family: 'Fira Code', monospace;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: .45rem;
}
.logo .logo-text span { color: var(--accent-dark); }
.logo-mark { width: 26px; height: 26px; flex-shrink: 0; }
.logo-text { display: inline; }
.nav-right {
  display: flex;
  align-items: center;
  gap: .25rem;
}
.nav-link {
  background: none;
  border: none;
  padding: .4rem .7rem;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  border-radius: 6px;
  transition: all .15s;
  text-decoration: none;
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-sep {
  width: 1px;
  height: 16px;
  background: var(--border-strong);
  margin: 0 .15rem;
}
.nav-icon-btn {
  background: none;
  border: none;
  padding: .4rem;
  cursor: pointer;
  border-radius: 6px;
  transition: background .15s;
  display: flex;
  align-items: center;
  text-decoration: none;
}
.nav-icon-btn:hover { background: var(--surface); }
.nav-icon-btn svg { width: 20px; height: 20px; color: var(--text-secondary); }

/* ── Layout ── */
main {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

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

/* ── Banner ── */
#banner-setup {
  background: var(--primary-light);
  border: 1px solid #99F6E4;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: .88rem;
  color: var(--accent-deeper);
  display: none;
  align-items: center;
  gap: .75rem;
}
#banner-setup a { color: var(--primary); font-weight: 600; cursor: pointer; text-decoration: underline; }

/* ── Hero ── */
.hero-card {
  background: linear-gradient(135deg, #1E3A5F 0%, #1E3A5F 30%, #115E59 70%, #0F766E 100%);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  color: #fff;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}
.hero-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(52,211,153,.15) 0%, transparent 55%);
  pointer-events: none;
}
.hero-card::after {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 300px;
  height: 300px;
  background: rgba(52,211,153,.06);
  border-radius: 50%;
}
.hero-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: .5rem;
  position: relative;
  z-index: 1;
}
.hero-sub {
  font-size: .95rem;
  color: #CBD5E1;
  font-weight: 400;
  max-width: 420px;
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

/* ── Steps ── */
.step { display: none; }
.step.active { display: block; }

.form-card { max-width: 480px; margin: 0 auto; }

.qr-result { max-width: 480px; margin: 0 auto; }

@media (max-width: 640px) {
  .hero-card { padding: 2rem 1.5rem; }
}

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 1.2rem;
}

/* ── Form ── */
.field { margin-bottom: 1.2rem; }
.field:last-child { margin-bottom: 0; }
label {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .4rem;
}
label .opt { font-weight: 400; color: var(--text-secondary); font-size: .8rem; }
input[type="text"], input[type="number"] {
  width: 100%;
  border: 2px solid var(--border-strong);
  border-radius: 10px;
  padding: .65rem .9rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
input:focus {
  border-color: var(--accent-dark);
  box-shadow: 0 0 0 4px rgba(15,118,110,.1);
}
input.error { border-color: var(--error); }
.field-error { font-size: .82rem; color: var(--error); margin-top: .3rem; display: none; }
.field-error.visible { display: block; }
.char-counter { font-size: .75rem; color: var(--text-secondary); text-align: right; margin-top: .25rem; }
.char-counter.warn { color: var(--warning); }
.char-counter.over { color: var(--error); }

.amount-wrap { display: flex; align-items: stretch; }
.amount-prefix {
  background: var(--primary-light);
  border: 2px solid #99F6E4;
  border-right: none;
  border-radius: 10px 0 0 10px;
  padding: .65rem .9rem;
  font-family: 'Fira Code', monospace;
  font-size: .9rem;
  font-weight: 700;
  color: var(--accent-deeper);
  display: flex;
  align-items: center;
}
.amount-wrap input { border-radius: 0 10px 10px 0; font-family: 'Fira Code', monospace; }
#set-iban, #set-bic { font-family: 'Fira Code', monospace; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  border: none;
  border-radius: 10px;
  padding: .75rem 1.5rem;
  font-size: .9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(30,58,95,.25);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-hover) 0%, var(--accent-deeper) 100%); box-shadow: 0 4px 12px rgba(30,58,95,.3); }
.btn-secondary { background: var(--surface); color: var(--text-secondary); border: 1px solid var(--border-strong); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: #FEF2F2; color: var(--error); }
.btn-danger:hover { background: #FEE2E2; }
.btn-sm { padding: .5rem 1rem; font-size: .82rem; }
.btn-full { width: 100%; }

/* ── QR ── */
#qr-card { text-align: center; }
#qrcode {
  display: inline-block;
  padding: 16px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  margin-bottom: 1rem;
}
#qrcode img, #qrcode canvas { display: block; }

dl.summary-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .4rem .85rem;
  font-size: .85rem;
  border-top: 1px solid var(--border);
  padding-top: .85rem;
  margin-top: .85rem;
  text-align: left;
}
dl.summary-list dt { font-weight: 600; color: var(--text-secondary); white-space: nowrap; }
dl.summary-list dd { color: var(--text); word-break: break-all; font-family: 'Fira Code', monospace; font-size: .85rem; }
dl.summary-list dd.amount-val { font-size: 1.1rem; font-weight: 700; color: var(--accent-dark); font-family: inherit; }
.qr-actions { display: flex; gap: .5rem; justify-content: center; flex-wrap: wrap; margin-top: .85rem; }

/* ── Settings ── */
#view-settings .card { max-width: 520px; margin: 0 auto; }
.settings-actions { display: flex; gap: .6rem; margin-top: 1.5rem; flex-wrap: wrap; }

/* ── How it works ── */
.how-content { max-width: 720px; margin: 0 auto; }
.how-hero {
  background: linear-gradient(135deg, #1E3A5F 0%, #1E3A5F 30%, #115E59 70%, #0F766E 100%);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.how-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(52,211,153,.15) 0%, transparent 55%);
  pointer-events: none;
}
.how-hero h2 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: .6rem;
  color: #fff;
  position: relative;
  z-index: 1;
}
.how-hero p {
  font-size: 1rem;
  color: #CBD5E1;
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}
.how-hero .highlight {
  color: var(--accent);
  font-weight: 600;
}

/* Two-column: You / Payer */
.how-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}
@media (max-width: 540px) { .how-columns { grid-template-columns: 1fr; } }
.how-col {
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 3px solid transparent;
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
}
.how-col:first-child { border-top-color: var(--primary); }
.how-col:last-child { border-top-color: var(--accent-dark); }
.how-col-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1.2rem;
  padding-bottom: .8rem;
  border-bottom: 1px solid var(--border);
}
.how-col-icon {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.how-col-icon svg { width: 18px; height: 18px; }
.how-col-icon.you { background: var(--primary); color: #fff; }
.how-col-icon.payer { background: var(--accent-dark); color: #fff; }
.how-col-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.how-steps { list-style: none; }
.how-steps li {
  position: relative;
  padding: .7rem 0 .7rem 2.2rem;
  font-size: .9rem;
  color: var(--text);
  line-height: 1.5;
}
.how-steps li + li { border-top: 1px solid var(--border); }
.how-steps li::before {
  content: attr(data-step);
  position: absolute;
  left: 0;
  top: .75rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  font-size: .72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.how-col:first-child .how-steps li::before { background: var(--primary); color: #fff; }
.how-col:last-child .how-steps li::before { background: var(--accent-dark); color: #fff; }
.how-steps .step-detail {
  display: block;
  font-size: .82rem;
  color: var(--text-secondary);
  margin-top: .2rem;
}
.how-section-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: .35rem;
}

/* Banking apps section */
.banking-info {
  background: linear-gradient(135deg, rgba(30,58,95,.03) 0%, rgba(15,118,110,.06) 100%);
  border: 1px solid #99F6E4;
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.banking-info-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .5rem;
}
.banking-info p {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: .75rem;
}
.banking-info p:last-child { margin-bottom: 0; }
.app-names {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .5rem;
}
.app-name {
  background: #fff;
  border: 1px solid #99F6E4;
  border-radius: 8px;
  padding: .35rem .75rem;
  font-size: .8rem;
  font-weight: 600;
  color: var(--accent-deeper);
}

.features-row {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
}
.feature-pill {
  display: flex;
  align-items: center;
  gap: .4rem;
  background: var(--primary);
  border: none;
  border-radius: 999px;
  padding: .55rem 1.1rem;
  font-size: .82rem;
  font-weight: 600;
  color: #fff;
}
.feature-pill .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── Imprint ── */
.imprint-content { max-width: 680px; margin: 0 auto; }
.imprint-content .card { margin-bottom: 1.5rem; }
.imprint-content h2 { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1rem; }
.imprint-content h3 { font-size: 1rem; font-weight: 700; margin-top: 1.2rem; margin-bottom: .4rem; }
.imprint-content p { font-size: .92rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: .5rem; }
.imprint-content ul { margin: .5rem 0; padding-left: 1.4rem; }
.imprint-content li { font-size: .92rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: .25rem; }
.imprint-content a { color: var(--accent-dark); text-decoration: none; }
.imprint-content a:hover { text-decoration: underline; }

/* ── Install prompt (index page) ── */
.install-prompt {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--primary-light);
  border: 1px solid #99F6E4;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
}
.install-prompt-text { flex: 1; min-width: 0; }
.install-prompt-title {
  font-size: .92rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .15rem;
}
.install-prompt-sub {
  font-size: .82rem;
  color: var(--accent-deeper);
  line-height: 1.5;
}
.install-prompt .btn { white-space: nowrap; flex-shrink: 0; }
@media (display-mode: standalone) {
  .install-prompt { display: none; }
}
@media (max-width: 480px) {
  .install-prompt { flex-direction: column; align-items: stretch; text-align: center; }
}

/* ── Install page ── */
.install-hero {
  background: linear-gradient(135deg, #1E3A5F 0%, #1E3A5F 30%, #115E59 70%, #0F766E 100%);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  text-align: center;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}
.install-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(52,211,153,.15) 0%, transparent 55%);
  pointer-events: none;
}
.install-hero h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: .5rem;
  position: relative;
  z-index: 1;
}
.install-hero p {
  font-size: 1rem;
  color: #CBD5E1;
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}
.install-browsers { display: flex; flex-direction: column; gap: 1rem; }
.install-browser {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-dark);
  border-radius: 12px;
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
}
.install-browser h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: .75rem; }
.install-browser > p { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; }
.install-platform {
  padding: .7rem 0;
}
.install-platform + .install-platform { border-top: 1px solid var(--border); }
.install-platform-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: .3rem;
}
.install-platform p { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: .25rem; }
.install-platform a, .install-browser-link { font-size: .85rem; color: var(--accent-dark); text-decoration: none; font-weight: 500; }
.install-platform a:hover, .install-browser-link:hover { text-decoration: underline; }
.install-browser-link { display: inline-block; margin-top: .6rem; }

/* ── Footer ── */
footer {
  text-align: center;
  font-size: .78rem;
  color: var(--text-secondary);
  padding: 2rem 1rem;
}
footer a {
  color: var(--text-secondary);
  text-decoration: none;
}
footer a:hover {
  color: var(--text-secondary);
  text-decoration: underline;
}

@media print {
  nav, footer, .hero-card, .qr-actions, #banner-setup, #step-form { display: none !important; }
  body { background: #fff; }
  #step-qr { display: block !important; }
  #qr-card { box-shadow: none; border: none; }
}

/* ── Toast ── */
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);background:#FFFBEB;color:#92400E;border:1px solid #FDE68A;padding:.625rem 1rem;border-radius:10px;font-size:.8rem;font-weight:500;box-shadow:0 4px 12px rgba(0,0,0,.1);z-index:9999;opacity:0;transition:opacity .3s;pointer-events:none;}
.toast.visible{opacity:1;}