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

:root {
  --accent:      #1b5e3a;
  --accent-dark: #134429;
  --bg:          #f1f5f9;
  --card-bg:     #ffffff;
  --text:        #1a1a1a;
  --muted:       #6b7280;
  --border:      #d1d5db;
  --radius:      10px;
  --shadow:      0 4px 24px rgba(0,0,0,.10);
}

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  background: var(--accent);
  padding: 28px 32px 22px;
  color: #fff;
}

.card-header .app-name {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  opacity: .8;
  margin-bottom: 6px;
}

.card-header h1 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .02em;
}

.card-subtitle {
  margin-top: 6px;
  font-size: 15px;
  opacity: .9;
}

.card-body {
  padding: 28px 32px 32px;
}

.field-group {
  margin-bottom: 18px;
}

.field-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.field-group input {
  width: 100%;
  padding: 11px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--text);
  background: #fafafa;
  transition: border-color .2s, background .2s;
}

.field-group input:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

.btn-login {
  width: 100%;
  padding: 13px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
  margin-top: 4px;
}

.btn-login:hover { background: var(--accent-dark); }
.btn-login:active { transform: scale(.98); }
.btn-login:disabled { opacity: .7; cursor: not-allowed; }

.error-box {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #b91c1c;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  margin-bottom: 18px;
}

.error-box[hidden] { display: none !important; }

.success-box {
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  color: #047857;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  margin-bottom: 18px;
}

.hint {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.hint a {
  color: var(--accent);
}