/* ═══════════════════════════════════════════
   IBAN Doğrulama — Premium Design System v2
   Fintech-grade UI · Light/Dark · Accessible
   ═══════════════════════════════════════════ */

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
img,svg{display:block;max-width:100%}
button,input,textarea,select{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}

/* ── Variables ── */
:root{
  --bg:#f8fafc;
  --bg-alt:#f1f5f9;
  --bg-gradient:linear-gradient(135deg,#eff6ff 0%,#f8fafc 50%,#f0fdf4 100%);
  --card:#ffffff;
  --card-hover:#f9fafb;
  --text:#0f172a;
  --text-secondary:#334155;
  --muted:#64748b;
  --border:#cbd5e1;
  --border-light:#e2e8f0;
  --accent:#1d4ed8;
  --accent-hover:#1e40af;
  --accent-light:#dbeafe;
  --accent-text:#1e40af;
  --accent-gradient:linear-gradient(135deg,#1d4ed8,#2563eb);
  --success:#059669;
  --success-light:#d1fae5;
  --success-text:#065f46;
  --danger:#dc2626;
  --danger-light:#fee2e2;
  --danger-text:#991b1b;
  --warning:#d97706;
  --warning-light:#fef3c7;
  --warning-text:#92400e;
  --info:#0891b2;
  --info-light:#cffafe;
  --info-text:#155e75;
  --shadow-sm:0 1px 2px rgba(0,0,0,.04);
  --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -4px rgba(0,0,0,.04);
  --shadow-xl:0 20px 25px -5px rgba(0,0,0,.08),0 8px 10px -6px rgba(0,0,0,.03);
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:16px;
  --radius-xl:24px;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --font-mono:'SF Mono',SFMono-Regular,ui-monospace,'DejaVu Sans Mono',Menlo,Consolas,monospace;
  --transition:200ms cubic-bezier(.4,0,.2,1);
  --container:1140px;
}

[data-theme="dark"]{
  --bg:#0a0f1a;
  --bg-alt:#111827;
  --bg-gradient:linear-gradient(135deg,#0a0f1a 0%,#111827 50%,#0a1628 100%);
  --card:#1a2332;
  --card-hover:#1e293b;
  --text:#f1f5f9;
  --text-secondary:#cbd5e1;
  --muted:#94a3b8;
  --border:#2d3a4a;
  --border-light:#1e293b;
  --accent:#3b82f6;
  --accent-hover:#60a5fa;
  --accent-light:rgba(59,130,246,.15);
  --accent-text:#93c5fd;
  --accent-gradient:linear-gradient(135deg,#2563eb,#3b82f6);
  --success:#10b981;
  --success-light:rgba(16,185,129,.15);
  --success-text:#6ee7b7;
  --danger:#ef4444;
  --danger-light:rgba(239,68,68,.15);
  --danger-text:#fca5a5;
  --warning:#f59e0b;
  --warning-light:rgba(245,158,11,.15);
  --warning-text:#fcd34d;
  --info:#06b6d4;
  --info-light:rgba(6,182,212,.15);
  --info-text:#67e8f9;
  --shadow-sm:0 1px 2px rgba(0,0,0,.3);
  --shadow:0 1px 3px rgba(0,0,0,.4),0 1px 2px rgba(0,0,0,.3);
  --shadow-md:0 4px 6px rgba(0,0,0,.35),0 2px 4px rgba(0,0,0,.2);
  --shadow-lg:0 10px 15px rgba(0,0,0,.4),0 4px 6px rgba(0,0,0,.2);
  --shadow-xl:0 20px 25px rgba(0,0,0,.4),0 10px 10px rgba(0,0,0,.2);
}

/* ── Base ── */
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  transition:background var(--transition),color var(--transition);
}

main{flex:1}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
.container-narrow{max-width:800px;margin:0 auto;padding:0 20px}

/* ── Typography ── */
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
h1{font-size:clamp(1.85rem,4.5vw,2.75rem);margin-bottom:.75rem;letter-spacing:-.02em}
h2{font-size:clamp(1.4rem,3vw,1.95rem);margin-bottom:.6rem;letter-spacing:-.015em}
h3{font-size:clamp(1.15rem,2.5vw,1.4rem);margin-bottom:.5rem}
h4{font-size:1.1rem;margin-bottom:.4rem}
p{margin-bottom:1rem;color:var(--text-secondary)}
strong{font-weight:600;color:var(--text)}

.lead{font-size:1.15rem;color:var(--muted);line-height:1.8;max-width:640px}
.text-center{text-align:center}
.text-muted{color:var(--muted)}
.text-accent{color:var(--accent)}
.text-success{color:var(--success)}
.text-danger{color:var(--danger)}
.text-warning{color:var(--warning)}

/* ── Links ── */
.link{color:var(--accent);text-decoration:underline;text-underline-offset:3px;transition:color var(--transition)}
.link:hover{color:var(--accent-hover)}

/* ── Breadcrumb ── */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem;
  align-items:center;
  padding:1rem 0;
  font-size:.875rem;
  color:var(--muted);
}
.breadcrumb a{color:var(--accent);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--accent-hover);text-decoration:underline}
.breadcrumb .sep{color:var(--border)}
.breadcrumb .current{color:var(--text-secondary);font-weight:500}

/* ── Header / Nav ── */
.site-header{
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border-light);
  position:sticky;
  top:0;
  z-index:100;
  transition:background var(--transition),border var(--transition);
}
[data-theme="dark"] .site-header{background:rgba(10,15,26,.85)}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:.75rem 0;
  gap:1rem;
}
.nav-brand{
  display:flex;
  align-items:center;
  gap:.5rem;
  font-weight:800;
  font-size:1.15rem;
  color:var(--accent);
  white-space:nowrap;
}
.nav-brand svg{width:26px;height:26px;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:.15rem}
.nav-links a,.nav-links li a{
  padding:.45rem .7rem;
  border-radius:var(--radius-sm);
  font-size:.88rem;
  font-weight:500;
  color:var(--text-secondary);
  transition:all var(--transition);
  white-space:nowrap;
  display:block;
}
.nav-links a:hover,.nav-links a.active,.nav-links li a:hover,.nav-links li a.active{
  background:var(--accent-light);
  color:var(--accent-text);
}
.nav-links li{list-style:none}
.nav-actions{display:flex;align-items:center;gap:.5rem}

.theme-toggle{
  display:flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:var(--card);
  cursor:pointer;
  transition:all var(--transition);
  color:var(--muted);
}
.theme-toggle:hover{background:var(--bg-alt);color:var(--text)}
.theme-toggle svg{width:18px;height:18px}

.hamburger{
  display:none;
  flex-direction:column;
  gap:4px;
  padding:8px;
  background:none;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  cursor:pointer;
}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:all var(--transition)}

@media(max-width:768px){
  .hamburger{display:flex}
  .nav-links{
    display:none;
    position:absolute;
    top:100%;left:0;right:0;
    background:var(--card);
    border-bottom:1px solid var(--border);
    flex-direction:column;
    padding:.75rem;
    box-shadow:var(--shadow-lg);
    z-index:50;
  }
  .nav-links.open{display:flex}
  .nav-links a,.nav-links li a{padding:.7rem 1rem;width:100%}
  .site-header .container{position:relative}
}

/* ── Hero ── */
.hero{
  padding:3.5rem 0 2.5rem;
  text-align:center;
  background:var(--bg-gradient);
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute;
  top:-50%;right:-20%;
  width:500px;height:500px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(59,130,246,.06) 0%,transparent 70%);
  pointer-events:none;
}
.hero::after{
  content:'';
  position:absolute;
  bottom:-30%;left:-15%;
  width:400px;height:400px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(5,150,105,.05) 0%,transparent 70%);
  pointer-events:none;
}
.hero h1{margin-bottom:.5rem;position:relative;z-index:1}
.hero .lead{margin:0 auto 1.5rem;position:relative;z-index:1}
.hero-compact{padding:2rem 0 1.5rem}
.hero-compact .lead{margin-bottom:0}

.hero-badges{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:.5rem;
  margin-bottom:1.5rem;
  position:relative;z-index:1;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:.3rem;
  padding:.35rem .75rem;
  border-radius:100px;
  font-size:.78rem;
  font-weight:600;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text-secondary);
  box-shadow:var(--shadow-sm);
}
.badge.badge-success{background:var(--success-light);color:var(--success-text);border-color:transparent}
.badge.badge-accent{background:var(--accent-light);color:var(--accent-text);border-color:transparent}
.badge.badge-warning{background:var(--warning-light);color:var(--warning-text);border-color:transparent}

/* ── Cards ── */
.card{
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-lg);
  padding:1.5rem;
  box-shadow:var(--shadow-sm);
  transition:all var(--transition);
}
.card:hover{box-shadow:var(--shadow-md)}
.card-header{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-bottom:1rem;
  padding-bottom:.75rem;
  border-bottom:1px solid var(--border-light);
}
.card-header h2,.card-header h3{margin-bottom:0}
.card-icon{
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius);
  font-size:1.25rem;
  flex-shrink:0;
}
.card-icon.accent{background:var(--accent-light);color:var(--accent-text)}
.card-icon.success{background:var(--success-light);color:var(--success-text)}
.card-icon.danger{background:var(--danger-light);color:var(--danger-text)}
.card-icon.warning{background:var(--warning-light);color:var(--warning-text)}
.card-icon.info{background:var(--info-light);color:var(--info-text)}

/* ── Tool Section ── */
.tool-section{
  max-width:740px;
  margin:0 auto 2rem;
}
.tool-card{
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-xl);
  padding:2rem;
  box-shadow:var(--shadow-md);
  position:relative;
  z-index:1;
}
.iban-input-wrap{
  position:relative;
  margin-bottom:1rem;
}
.iban-input{
  width:100%;
  padding:1.1rem 4.5rem 1.1rem 1.25rem;
  font-family:var(--font-mono);
  font-size:1.2rem;
  letter-spacing:.1em;
  border:2px solid var(--border);
  border-radius:var(--radius);
  background:var(--bg);
  color:var(--text);
  transition:all var(--transition);
  outline:none;
}
.iban-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.iban-input.valid{border-color:var(--success);box-shadow:0 0 0 4px rgba(5,150,105,.1)}
.iban-input.invalid{border-color:var(--danger);box-shadow:0 0 0 4px rgba(220,38,38,.1)}
.iban-input::placeholder{color:var(--muted);opacity:.5;letter-spacing:.04em;font-size:1.05rem}
.input-hint{
  font-size:.8rem;
  color:var(--muted);
  margin-top:.35rem;
  display:flex;align-items:center;gap:.3rem;
}
.input-error{
  font-size:.85rem;
  color:var(--danger);
  margin-top:.4rem;
  display:none;
  align-items:center;
  gap:.3rem;
}
.input-error.show{display:flex}
.char-count{
  position:absolute;
  right:14px;top:50%;
  transform:translateY(-50%);
  font-size:.75rem;
  color:var(--muted);
  font-family:var(--font-mono);
  pointer-events:none;
  background:var(--bg-alt);
  padding:.15rem .4rem;
  border-radius:4px;
}

/* ── Options Row ── */
.options-row{
  display:flex;
  flex-wrap:wrap;
  gap:.85rem;
  margin-bottom:1.25rem;
}
.option-toggle{
  display:flex;
  align-items:center;
  gap:.4rem;
  font-size:.84rem;
  color:var(--text-secondary);
  cursor:pointer;
  user-select:none;
}
.toggle-switch{
  position:relative;
  width:36px;height:20px;
  flex-shrink:0;
}
.toggle-switch input{opacity:0;width:0;height:0;position:absolute}
.toggle-track{
  position:absolute;inset:0;
  background:var(--border);
  border-radius:100px;
  transition:background var(--transition);
  cursor:pointer;
}
.toggle-track::after{
  content:'';
  position:absolute;
  top:2px;left:2px;
  width:16px;height:16px;
  background:#fff;
  border-radius:50%;
  transition:transform var(--transition);
  box-shadow:0 1px 3px rgba(0,0,0,.2);
}
.toggle-switch input:checked+.toggle-track{background:var(--accent)}
.toggle-switch input:checked+.toggle-track::after{transform:translateX(16px)}
.toggle-switch input:focus-visible+.toggle-track{outline:2px solid var(--accent);outline-offset:2px}

/* ── Buttons ── */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.4rem;
  padding:.7rem 1.4rem;
  border:none;
  border-radius:var(--radius);
  font-weight:600;
  font-size:.9rem;
  cursor:pointer;
  transition:all var(--transition);
  white-space:nowrap;
  text-decoration:none;
  position:relative;
  overflow:hidden;
}
.btn:active{transform:scale(.97)}
.btn-primary{
  background:var(--accent-gradient);
  color:#fff;
  box-shadow:0 2px 8px rgba(29,78,216,.25);
}
.btn-primary:hover{box-shadow:0 4px 16px rgba(29,78,216,.35);transform:translateY(-1px)}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{opacity:.9}
.btn-outline{
  background:transparent;
  border:1.5px solid var(--border);
  color:var(--text-secondary);
}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-light)}
.btn-sm{padding:.4rem .85rem;font-size:.82rem;border-radius:var(--radius-sm)}
.btn-lg{padding:.9rem 2.25rem;font-size:1rem;border-radius:var(--radius)}
.btn-xl{padding:1rem 2.75rem;font-size:1.05rem;border-radius:var(--radius)}
.btn-icon{padding:.5rem;border-radius:var(--radius-sm);background:transparent;border:1px solid var(--border);color:var(--muted);cursor:pointer;transition:all var(--transition)}
.btn-icon:hover{background:var(--bg-alt);color:var(--text);border-color:var(--accent)}
.btn-group{display:flex;flex-wrap:wrap;gap:.5rem}
.btn-block{width:100%}

/* ── Results ── */
.results-area{
  margin-top:1.5rem;
  display:none;
}
.results-area.show{display:block;animation:fadeSlide .4s ease}

@keyframes fadeSlide{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

.status-banner{
  display:flex;
  align-items:center;
  gap:.75rem;
  padding:1rem 1.25rem;
  border-radius:var(--radius);
  margin-bottom:1.25rem;
  font-weight:600;
  font-size:1.05rem;
}
.status-banner.valid{background:var(--success-light);color:var(--success-text);border:1px solid var(--success)}
.status-banner.invalid{background:var(--danger-light);color:var(--danger-text);border:1px solid var(--danger)}
.status-banner.warning{background:var(--warning-light);color:var(--warning-text);border:1px solid var(--warning)}
.status-icon{font-size:1.4rem;flex-shrink:0}

.result-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:1rem;
  margin-bottom:1.5rem;
}
@media(min-width:640px){
  .result-grid{grid-template-columns:1fr 1fr}
  .result-grid .full{grid-column:1/-1}
}

.result-card{
  background:var(--bg);
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  padding:1rem 1.25rem;
}
.result-label{
  font-size:.75rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--muted);
  margin-bottom:.4rem;
}
.result-value{
  font-family:var(--font-mono);
  font-size:1.05rem;
  font-weight:600;
  color:var(--text);
  word-break:break-all;
}
.result-value.large{font-size:1.2rem;letter-spacing:.05em}
.result-note{font-size:.8rem;color:var(--muted);margin-top:.3rem;font-style:italic}
.result-bank{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-top:.3rem;
  flex-wrap:wrap;
}
.bank-badge{
  display:inline-flex;
  align-items:center;
  gap:.3rem;
  padding:.25rem .6rem;
  border-radius:100px;
  font-size:.82rem;
  font-weight:600;
  background:var(--accent-light);
  color:var(--accent-text);
}

/* ── Export Area ── */
.export-area{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  padding-top:1rem;
  border-top:1px solid var(--border-light);
  margin-top:1rem;
}

/* ── Security Tips ── */
.security-tips{
  margin-top:1.5rem;
  padding:1.25rem 1.5rem;
  background:var(--warning-light);
  border:1px solid var(--warning);
  border-radius:var(--radius);
}
.security-tips h4{color:var(--warning-text);margin-bottom:.5rem;display:flex;align-items:center;gap:.4rem}
.security-tips ul{padding-left:1.2rem;list-style:disc}
.security-tips li{color:var(--warning-text);font-size:.9rem;margin-bottom:.3rem}

/* ── Section Grid ── */
.section{padding:3rem 0}
.section-header{margin-bottom:1.75rem}
.section-header h2{margin-bottom:.3rem}
.section-header .lead{margin-top:.25rem}
.section-divider{
  padding:3.5rem 0;
  background:var(--bg-alt);
  border-top:1px solid var(--border-light);
  border-bottom:1px solid var(--border-light);
}

.grid-2{display:grid;grid-template-columns:1fr;gap:1rem}
.grid-3{display:grid;grid-template-columns:1fr;gap:1rem}
.grid-4{display:grid;grid-template-columns:1fr;gap:1rem}
@media(min-width:640px){
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
}
@media(min-width:960px){
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
}

/* ── Feature Cards ── */
.feature-card{
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-lg);
  padding:1.5rem;
  transition:all var(--transition);
  text-align:center;
}
.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.feature-icon{
  width:56px;height:56px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius-lg);
  font-size:1.5rem;
  margin:0 auto 1rem;
}
.feature-card h3{font-size:1.05rem;margin-bottom:.4rem}
.feature-card p{font-size:.88rem;color:var(--muted);margin-bottom:0;line-height:1.6}

/* ── Steps / How it works ── */
.steps{
  display:grid;
  grid-template-columns:1fr;
  gap:1.5rem;
  counter-reset:step;
  position:relative;
}
@media(min-width:768px){
  .steps{grid-template-columns:repeat(3,1fr)}
}
.step{
  text-align:center;
  position:relative;
  counter-increment:step;
}
.step-number{
  width:48px;height:48px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--accent-gradient);
  color:#fff;
  font-weight:800;
  font-size:1.15rem;
  margin:0 auto .75rem;
  box-shadow:0 4px 12px rgba(29,78,216,.2);
}
.step h3{font-size:1.05rem;margin-bottom:.3rem}
.step p{font-size:.88rem;color:var(--muted);margin-bottom:0;line-height:1.6}

/* ── Stats ── */
.stats-row{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1.5rem;
  padding:1.5rem 0;
}
@media(min-width:768px){
  .stats-row{grid-template-columns:repeat(4,1fr)}
}
.stat{text-align:center}
.stat-value{
  font-size:clamp(1.75rem,4vw,2.5rem);
  font-weight:800;
  color:var(--accent);
  line-height:1.2;
  letter-spacing:-.02em;
}
.stat-label{font-size:.85rem;color:var(--muted);margin-top:.15rem}

/* ── Link Cards ── */
.link-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius-lg);
  padding:1.35rem;
  transition:all var(--transition);
  text-decoration:none;
  height:100%;
}
.link-card:hover{
  border-color:var(--accent);
  box-shadow:var(--shadow-md);
  transform:translateY(-3px);
}
.link-card h3{font-size:1rem;margin-bottom:.35rem;color:var(--text)}
.link-card p{font-size:.87rem;color:var(--muted);margin-bottom:0;flex:1;line-height:1.6}
.link-card .card-tag{
  display:inline-block;
  margin-top:.65rem;
  font-size:.72rem;
  font-weight:700;
  padding:.2rem .55rem;
  border-radius:100px;
  background:var(--bg-alt);
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.04em;
}
.link-card .card-icon-top{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius);
  font-size:1.15rem;
  margin-bottom:.75rem;
}

/* ── Bank List ── */
.bank-list{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:.75rem;
}
.bank-item{
  display:flex;
  align-items:center;
  gap:.75rem;
  padding:.85rem 1.1rem;
  background:var(--card);
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  transition:all var(--transition);
  text-decoration:none;
}
.bank-item:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-1px)}
.bank-code{
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:700;
  padding:.3rem .55rem;
  background:var(--accent-light);
  color:var(--accent-text);
  border-radius:var(--radius-sm);
  white-space:nowrap;
}
.bank-name{font-weight:500;font-size:.9rem;color:var(--text)}

/* ── FAQ Accordion ── */
.accordion{margin:1rem 0}
.accordion-item{
  border:1px solid var(--border-light);
  border-radius:var(--radius);
  margin-bottom:.5rem;
  overflow:hidden;
  background:var(--card);
}
.accordion-trigger{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:1rem 1.25rem;
  background:none;
  border:none;
  cursor:pointer;
  text-align:left;
  font-weight:600;
  font-size:.95rem;
  color:var(--text);
  transition:background var(--transition);
}
.accordion-trigger:hover{background:var(--bg-alt)}
.accordion-trigger .arrow{
  flex-shrink:0;
  width:20px;height:20px;
  transition:transform var(--transition);
  color:var(--muted);
}
.accordion-item.open .accordion-trigger .arrow{transform:rotate(180deg)}
.accordion-content{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.accordion-content-inner{
  padding:0 1.25rem 1.25rem;
  color:var(--text-secondary);
  font-size:.92rem;
  line-height:1.7;
}
.accordion-content-inner p{margin-bottom:.75rem}
.accordion-content-inner p:last-child{margin-bottom:0}

/* ── Search ── */
.search-wrap{max-width:600px;margin:0 auto 2rem}
.search-input{
  width:100%;
  padding:.85rem 1.25rem .85rem 2.75rem;
  border:2px solid var(--border);
  border-radius:100px;
  background:var(--card);
  font-size:1rem;
  transition:all var(--transition);
  outline:none;
}
.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(59,130,246,.12)}
.search-icon{
  position:absolute;
  left:1rem;top:50%;
  transform:translateY(-50%);
  width:18px;height:18px;
  color:var(--muted);
  pointer-events:none;
}
.search-wrap .iban-input-wrap{position:relative}
.filter-chips{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:.4rem;
  margin-top:1rem;
}
.chip{
  padding:.35rem .75rem;
  border-radius:100px;
  font-size:.82rem;
  font-weight:600;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text-secondary);
  cursor:pointer;
  transition:all var(--transition);
}
.chip:hover,.chip.active{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
}
.search-results{margin-top:1.5rem}
.search-results .no-results{text-align:center;padding:2rem;color:var(--muted)}

/* ── Article / Guide ── */
.article{max-width:740px;margin:0 auto;padding:2rem 0 3rem}
.article h1{margin-bottom:.5rem}
.article .article-meta{
  display:flex;flex-wrap:wrap;gap:.75rem;
  font-size:.85rem;color:var(--muted);
  margin-bottom:1.5rem;padding-bottom:1rem;
  border-bottom:1px solid var(--border-light);
}
.article h2{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border-light)}
.article h3{margin-top:1.5rem}
.article p{color:var(--text-secondary);font-size:1rem;line-height:1.8}
.article ul,.article ol{
  padding-left:1.5rem;
  margin-bottom:1rem;
  list-style:disc;
}
.article ol{list-style:decimal}
.article li{margin-bottom:.4rem;color:var(--text-secondary);line-height:1.7}
.article blockquote{
  margin:1.5rem 0;
  padding:1rem 1.5rem;
  border-left:4px solid var(--accent);
  background:var(--bg-alt);
  border-radius:0 var(--radius) var(--radius) 0;
  font-style:italic;
  color:var(--text-secondary);
}
.article code{
  font-family:var(--font-mono);
  padding:.15rem .4rem;
  background:var(--bg-alt);
  border-radius:4px;
  font-size:.9em;
}
.article .iban-example{
  font-family:var(--font-mono);
  padding:.5rem 1rem;
  background:var(--bg-alt);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  display:inline-block;
  font-size:1rem;
  letter-spacing:.06em;
  margin:.5rem 0;
}
.article .cta-box,.cta-box{
  margin:2rem 0;
  padding:1.5rem 2rem;
  background:var(--accent-light);
  border:1px solid var(--accent);
  border-radius:var(--radius-lg);
  text-align:center;
}
.article .cta-box p,.cta-box p{color:var(--accent-text);margin-bottom:.75rem}

.related-links{
  margin-top:2rem;
  padding-top:1.5rem;
  border-top:2px solid var(--border-light);
}
.related-links h3{margin-bottom:1rem}
.related-links ul{padding-left:0;list-style:none}
.related-links li{margin-bottom:.4rem}
.related-links a{
  color:var(--accent);
  text-decoration:underline;
  text-underline-offset:3px;
  font-size:.95rem;
}
.related-links a:hover{color:var(--accent-hover)}

/* ── Disclaimer Banner ── */
.disclaimer-banner{
  padding:.75rem 1.25rem;
  background:var(--info-light);
  border:1px solid var(--info);
  border-radius:var(--radius-sm);
  font-size:.82rem;
  color:var(--info-text);
  margin-bottom:1.5rem;
  display:flex;
  align-items:flex-start;
  gap:.5rem;
}

/* ── Toast ── */
.toast{
  position:fixed;
  bottom:2rem;
  right:2rem;
  padding:.75rem 1.25rem;
  background:var(--text);
  color:var(--bg);
  border-radius:var(--radius);
  font-size:.9rem;
  font-weight:500;
  box-shadow:var(--shadow-lg);
  z-index:9999;
  opacity:0;
  transform:translateY(20px);
  transition:all .3s ease;
  pointer-events:none;
}
.toast.show{opacity:1;transform:translateY(0);pointer-events:auto}

/* ── Cookie Consent ── */
.cookie-banner{
  position:fixed;
  bottom:0;left:0;right:0;
  background:var(--card);
  border-top:1px solid var(--border);
  padding:1rem 1.5rem;
  box-shadow:var(--shadow-xl);
  z-index:9998;
  display:none;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:1rem;
}
.cookie-banner.show{display:flex}
.cookie-banner p{margin:0;font-size:.88rem;color:var(--text-secondary)}
.cookie-banner a{color:var(--accent);text-decoration:underline}
.cookie-actions{display:flex;gap:.5rem}

/* ── AdSense ── */
.ad-slot{
  margin:1.5rem auto;
  max-width:740px;
  min-height:90px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--bg-alt);
  border:1px dashed var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.ad-slot ins{display:block;width:100%}

/* ── Footer ── */
.site-footer{
  background:var(--card);
  border-top:1px solid var(--border-light);
  padding:3rem 0 1.5rem;
  margin-top:3rem;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:2rem;
  margin-bottom:2rem;
}
@media(max-width:768px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.5rem}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
}
.footer-brand{color:var(--muted);font-size:.9rem;line-height:1.7}
.footer-brand strong{display:block;font-size:1.1rem;color:var(--text);margin-bottom:.4rem}
.footer-col h4{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:.75rem}
.footer-col a{display:block;padding:.25rem 0;font-size:.9rem;color:var(--text-secondary);transition:color var(--transition)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  padding-top:1.5rem;
  border-top:1px solid var(--border-light);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:.5rem;
  font-size:.82rem;
  color:var(--muted);
}
.footer-disclaimer{
  margin-top:1rem;
  padding:1rem 1.25rem;
  background:var(--bg-alt);
  border-radius:var(--radius);
  font-size:.8rem;
  color:var(--muted);
  line-height:1.6;
}

/* ── Contact Form ── */
.contact-form{max-width:560px;margin:0 auto}
.form-group{margin-bottom:1.25rem}
.form-group label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.35rem;color:var(--text)}
.form-group input,.form-group textarea,.form-group select{
  width:100%;
  padding:.75rem 1rem;
  border:1.5px solid var(--border);
  border-radius:var(--radius-sm);
  background:var(--card);
  font-size:.95rem;
  transition:border var(--transition);
  outline:none;
}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent)}
.form-group textarea{min-height:140px;resize:vertical}

/* ── Table ── */
.table-wrap{overflow-x:auto;margin:1rem 0}
.data-table{
  width:100%;
  border-collapse:collapse;
  font-size:.9rem;
}
.data-table th,.data-table td{
  padding:.65rem .85rem;
  text-align:left;
  border-bottom:1px solid var(--border-light);
}
.data-table th{
  background:var(--bg-alt);
  font-weight:700;
  font-size:.82rem;
  text-transform:uppercase;
  letter-spacing:.04em;
  color:var(--muted);
}
.data-table tr:hover td{background:var(--card-hover)}

/* ── Bank Detail ── */
.bank-detail-header{
  display:flex;
  align-items:center;
  gap:1rem;
  margin-bottom:1.5rem;
  flex-wrap:wrap;
}
.bank-detail-header .bank-code{font-size:1.1rem;padding:.4rem .8rem}
.bank-detail-header h1{margin-bottom:0}
.bank-detail-content{max-width:740px}

.iban-structure{
  font-family:var(--font-mono);
  display:flex;
  flex-wrap:wrap;
  gap:.25rem;
  margin:1rem 0;
  font-size:1rem;
}
.iban-part{
  padding:.35rem .6rem;
  border-radius:var(--radius-sm);
  font-weight:600;
  border:1px solid transparent;
}
.iban-part.country{background:var(--accent-light);color:var(--accent-text);border-color:var(--accent)}
.iban-part.check{background:var(--warning-light);color:var(--warning-text);border-color:var(--warning)}
.iban-part.bank{background:var(--success-light);color:var(--success-text);border-color:var(--success)}
.iban-part.account{background:var(--info-light);color:var(--info-text);border-color:var(--info)}

.iban-legend{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem;
  margin:.75rem 0 1.5rem;
  font-size:.82rem;
}
.legend-item{
  display:flex;
  align-items:center;
  gap:.3rem;
}
.legend-dot{
  width:12px;height:12px;
  border-radius:3px;
  flex-shrink:0;
}
.legend-dot.country{background:var(--accent-light);border:1px solid var(--accent)}
.legend-dot.check{background:var(--warning-light);border:1px solid var(--warning)}
.legend-dot.bank{background:var(--success-light);border:1px solid var(--success)}
.legend-dot.account{background:var(--info-light);border:1px solid var(--info)}

/* ── 404 Page ── */
.error-page{min-height:60vh;display:flex;align-items:center;justify-content:center;padding:3rem 0}
.error-content{text-align:center;max-width:480px}
.error-code{font-size:5rem;font-weight:800;line-height:1;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}
.error-subtitle{font-size:1.25rem;font-weight:600;color:var(--text);margin-bottom:.75rem}
.error-desc{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.7}
.error-links{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}

/* ── Utility ── */
.mt-0{margin-top:0}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}
.pt-0{padding-top:0}.pb-0{padding-bottom:0}
.hidden{display:none!important}
.sr-only,.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.flex{display:flex}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.gap-1{gap:.5rem}.gap-2{gap:1rem}

/* ── Legal Pages ── */
.legal-content{max-width:740px;margin:0 auto;padding:2rem 0 3rem}
.legal-content h1{margin-bottom:1.5rem}
.legal-content h2{margin-top:2rem;font-size:1.3rem}
.legal-content h3{margin-top:1.5rem;font-size:1.1rem}
.legal-content p{color:var(--text-secondary);line-height:1.8}
.legal-content ul{padding-left:1.5rem;margin-bottom:1rem;list-style:disc}
.legal-content li{color:var(--text-secondary);margin-bottom:.4rem;line-height:1.7}

/* ── Print ── */
@media print{
  .site-header,.site-footer,.cookie-banner,.toast,.ad-slot,
  .options-row,.btn-group,.export-area,.hamburger,.nav-actions,
  .security-tips,.related-links,.cookie-banner{display:none!important}
  body{background:#fff;color:#000;font-size:12pt}
  .card,.tool-card{border:1px solid #ccc;box-shadow:none;break-inside:avoid}
  .results-area{display:block!important}
  .status-banner{border:2px solid #000}
  .result-value{color:#000}
  a{color:#000;text-decoration:none}
  a[href]::after{content:" (" attr(href) ")";font-size:9pt;color:#666}
  .container{max-width:100%;padding:0}
  .hero{background:none!important}
  .hero::before,.hero::after{display:none}
}

/* ── Animations ── */
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.loading{animation:pulse 1.5s ease-in-out infinite}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.float-anim{animation:float 3s ease-in-out infinite}