:root {
  --fonto:    #fafafa;
  --epifaneia:#ffffff;
  --keimeno:  #111318;
  --gkri:     #6b7280;
  --grammi:   #e6e8eb;
  --kokkino:  #b42318;
  --prasino:  #15803d;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--fonto);
  color: var(--keimeno);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.kentro {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.krymmeno { display: none; }

.kouti {
  width: 100%;
  max-width: 380px;
  background: var(--epifaneia);
  border: 0.5px solid var(--grammi);
  border-radius: 12px;
  padding: 44px 40px;
}

h1 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.ypotitlos {
  margin: 0 0 32px;
  font-size: 14px;
  color: var(--gkri);
}

label {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 500;
  color: var(--gkri);
}

input {
  width: 100%;
  margin-bottom: 20px;
  padding: 11px 13px;
  font-family: inherit;
  font-size: 15px;
  color: var(--keimeno);
  background: var(--epifaneia);
  border: 0.5px solid var(--grammi);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s;
}

input:focus { border-color: var(--keimeno); }

button {
  width: 100%;
  padding: 11px 16px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--epifaneia);
  background: var(--keimeno);
  border: 0.5px solid var(--keimeno);
  border-radius: 8px;
  cursor: pointer;
  transition: opacity 0.15s;
}

button:hover { opacity: 0.85; }

button:disabled { opacity: 0.4; cursor: default; }

button.deytereuon {
  margin-top: 10px;
  color: var(--gkri);
  background: var(--epifaneia);
  border-color: var(--grammi);
}

.lathos, .apotelesma {
  margin-top: 18px;
  font-size: 13px;
  min-height: 19px;
}

.lathos { color: var(--kokkino); }

.apotelesma.kalo   { color: var(--prasino); }
.apotelesma.kako   { color: var(--kokkino); }
.apotelesma.oudetero { color: var(--gkri); }