:root {
  --green:  #4ADE80;
  --green2: #22C55E;
  --dark:   #060810;
  --dark2:  #0c0f1a;
  --dark3:  #111425;
  --muted:  #8892A4;
  --white:  #FFFFFF;
  --red:    #E63946;
  --amber:  #F59E0B;
  --cyan:   #06B6D4;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  min-height: 100%;
  background: var(--dark);
  color: var(--white);
  font-family: 'Barlow', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Ana kart ── */
.card {
  width: 100%;
  max-width: 460px;
  background: var(--dark2);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 20px;
  padding: 48px 40px;
  margin: 40px 20px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--cyan));
}

/* Logo */
.logo {
  display: flex;
  align-items: baseline;
  gap: 2px;
  text-decoration: none;
  margin-bottom: 36px;
  justify-content: center;
}
.logo-s { font-family: 'Bebas Neue', sans-serif; font-size: 20px; color: var(--white); letter-spacing: 1px; }
.logo-g { font-family: 'Bebas Neue', sans-serif; font-size: 20px; color: var(--green); letter-spacing: 1px; }
.logo-t { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--green); opacity: .6; }

/* Adım indikatörü */
.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 36px;
}
.step-dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--muted);
  transition: all .3s;
  flex-shrink: 0;
}
.step-dot.active { background: var(--green); border-color: var(--green); color: #000; font-weight: 700; }
.step-dot.done   { background: rgba(74,222,128,.15); border-color: rgba(74,222,128,.4); color: var(--green); }
.step-label { font-family: 'JetBrains Mono', monospace; font-size: 9px; color: var(--muted); letter-spacing: 1px; margin-top: 5px; text-align: center; white-space: nowrap; }
.step-wrap { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.step-line { width: 40px; height: 1px; background: rgba(255,255,255,.08); margin: 0 4px; margin-bottom: 18px; transition: background .3s; }
.step-line.done { background: rgba(74,222,128,.35); }

/* Başlık */
.screen-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 30px; letter-spacing: 1px;
  margin-bottom: 6px; text-align: center;
}
.screen-sub {
  font-size: 13px; color: var(--muted);
  text-align: center; line-height: 1.7;
  margin-bottom: 24px; font-weight: 300;
}

/* Info box */
.info-box {
  background: rgba(6,182,212,.05);
  border: 1px solid rgba(6,182,212,.15);
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 12px; color: rgba(6,182,212,.8);
  line-height: 1.7; margin-bottom: 20px;
}

/* Hata */
.error-banner {
  background: rgba(230,57,70,.08);
  border: 1px solid rgba(230,57,70,.2);
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 13px; color: rgba(230,57,70,.9);
  margin-bottom: 16px; display: none; line-height: 1.6;
}
.error-banner.show { display: block; }
.field-error { font-size: 11px; color: var(--red); display: none; margin-top: -10px; margin-bottom: 8px; }
.field-error.show { display: block; }

/* Input */
.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 18px; }
.field label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; color: var(--muted);
  letter-spacing: 1px; text-transform: uppercase;
}
.field input {
  background: var(--dark3);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 14px; color: var(--white);
  font-family: 'Barlow', sans-serif;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
}
.field input::placeholder { color: rgba(255,255,255,.2); }
.field input:focus {
  border-color: rgba(74,222,128,.4);
  box-shadow: 0 0 0 3px rgba(74,222,128,.08);
}
.field input.error   { border-color: rgba(230,57,70,.5); }
.field input.success { border-color: rgba(74,222,128,.35); }

/* Şifre */
.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 48px; }
.pw-toggle {
  position: absolute; right: 14px; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  cursor: pointer; color: var(--muted);
  font-size: 16px; padding: 4px;
  transition: color .2s;
}
.pw-toggle:hover { color: var(--white); }

/* Şifre güç */
.pw-strength { display: grid; grid-template-columns: repeat(4,1fr); gap: 4px; margin-top: 6px; }
.pw-bar { height: 3px; background: rgba(255,255,255,.08); border-radius: 2px; transition: background .3s; }
.pw-bar.weak   { background: var(--red); }
.pw-bar.medium { background: var(--amber); }
.pw-bar.strong { background: var(--green); }
.pw-label { font-family: 'JetBrains Mono', monospace; font-size: 9px; color: var(--muted); margin-top: 4px; letter-spacing: 1px; }

/* OTP */
.otp-row { display: flex; gap: 8px; justify-content: center; margin-bottom: 16px; }
.otp-box {
  width: 52px; height: 58px;
  background: var(--dark3);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px; font-weight: 600;
  color: var(--white);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  caret-color: var(--green);
}
.otp-box:focus {
  border-color: rgba(74,222,128,.5);
  box-shadow: 0 0 0 3px rgba(74,222,128,.1);
}
.otp-box.filled  { border-color: rgba(74,222,128,.35); background: rgba(74,222,128,.04); }
.otp-box.error   { border-color: rgba(230,57,70,.5); animation: shake .35s ease; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-5px)} 75%{transform:translateX(5px)} }

/* Resend */
.resend-row { text-align: center; font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.resend-btn {
  background: none; border: none;
  color: var(--green); cursor: pointer;
  font-size: 13px; font-family: 'Barlow', sans-serif;
  font-weight: 600; text-decoration: underline; padding: 0;
}
.resend-btn:disabled { color: var(--muted); text-decoration: none; cursor: default; }

/* Buton */
.btn {
  width: 100%; padding: 14px;
  background: linear-gradient(135deg, var(--green2), #16a34a);
  color: #022005; border: none; border-radius: 11px;
  font-size: 15px; font-weight: 700;
  font-family: 'Barlow', sans-serif;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, opacity .2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(74,222,128,.3);
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn .spinner {
  display: none; width: 18px; height: 18px;
  border: 2px solid rgba(0,0,0,.2); border-top-color: #000;
  border-radius: 50%; animation: spin .8s linear infinite;
}
.btn.loading .btn-text { display: none; }
.btn.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Geri link */
.back-link {
  display: flex; align-items: center; gap: 6px;
  color: var(--muted); font-size: 13px;
  text-decoration: none; margin-bottom: 24px;
  background: none; border: none; cursor: pointer;
  font-family: 'Barlow', sans-serif;
  transition: color .2s; padding: 0;
}
.back-link:hover { color: var(--white); }
.back-link svg { transition: transform .2s; }
.back-link:hover svg { transform: translateX(-3px); }

/* Başarı */
.success-wrap { text-align: center; padding: 12px 0; }
.success-icon {
  width: 72px; height: 72px;
  background: rgba(74,222,128,.08);
  border: 1px solid rgba(74,222,128,.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; margin: 0 auto 20px;
  animation: pop .5s cubic-bezier(.16,1,.3,1);
}
@keyframes pop { from{transform:scale(.4);opacity:0} to{transform:scale(1);opacity:1} }
.success-title { font-family: 'Bebas Neue', sans-serif; font-size: 28px; letter-spacing: 1px; margin-bottom: 10px; }
.success-sub { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 28px; }

/* Güvenlik notu */
.security-note {
  margin-top: 16px;
  padding: 11px 14px;
  background: rgba(245,158,11,.04);
  border: 1px solid rgba(245,158,11,.1);
  border-radius: 10px;
  font-size: 11px; color: rgba(255,255,255,.3);
  line-height: 1.7;
}

/* Giriş linki */
.login-link { text-align: center; margin-top: 20px; font-size: 13px; color: var(--muted); }
.login-link a { color: var(--green); text-decoration: none; font-weight: 600; }
.login-link a:hover { text-decoration: underline; }

/* Ekranlar */
.screen { display: none; animation: slideIn .3s cubic-bezier(.16,1,.3,1); }
.screen.active { display: block; }
@keyframes slideIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

@media (max-width: 500px) {
  .card { padding: 36px 24px; }
  .otp-box { width: 44px; height: 52px; font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}