:root {
  --navy:     #071428;
  --cel-mid:  #0ea5e9;
  --cel-dark: #0284c7;
  --text:     #1e293b;
  --muted:    #64748b;
  --border:   #e2e8f0;
  --white:    #ffffff;
  --error:    #ef4444;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #071428 0%, #0f2040 60%, #1e3a5f 100%);
}

.login-wrap { width: 100%; max-width: 420px; padding: 20px; }

.login-card {
  background: var(--white);
  border-radius: 20px;
  padding: 48px 40px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}
.login-logo i    { font-size: 2rem; color: var(--cel-mid); }
.login-logo span { font-size: 1.5rem; font-weight: 800; color: var(--navy); }

.login-subtitle {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 36px;
}

.form-field { margin-bottom: 16px; }
.form-field label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 6px;
}
.form-field input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 0.92rem;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-field input:focus {
  border-color: var(--cel-mid);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}

.login-btn {
  width: 100%;
  padding: 13px;
  background: var(--cel-mid);
  color: var(--white);
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: background 0.2s, transform 0.15s;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.login-btn:hover   { background: var(--cel-dark); transform: translateY(-1px); }
.login-btn:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }

.login-error {
  margin-top: 14px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--error);
  min-height: 22px;
}

.login-back {
  text-align: center;
  margin-top: 22px;
}
.login-back a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.login-back a:hover { color: var(--cel-mid); }