*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --red: #e63946; --dark: #0f0f1a; --dark2: #1a1a2e; --card: #1e1e32;
  --white: #ffffff; --gray: #b8b8d0; --border: rgba(255,255,255,0.08);
  --radius: 12px; --font: 'Inter','Helvetica Neue',Arial,sans-serif;
}
body {
  font-family: var(--font);
  background: var(--dark);
  color: var(--white);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background-image: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(230,57,70,0.14) 0%, transparent 65%);
}
.login-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  width: min(400px, 100%);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}
.login-logo {
  font-size: 1.3rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.4rem;
}
.login-logo span { color: var(--red); }
.login-subtitle {
  text-align: center;
  color: var(--gray);
  font-size: 0.88rem;
  margin-bottom: 2rem;
}
.field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.25rem; }
label { font-size: 0.82rem; font-weight: 600; color: rgba(255,255,255,0.55); }
input {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--white);
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font);
  outline: none;
  transition: border-color .2s;
  width: 100%;
}
input:focus { border-color: var(--red); }
input::placeholder { color: rgba(255,255,255,0.2); }
.btn-login {
  background: var(--red);
  color: var(--white);
  border: 2px solid var(--red);
  padding: 0.9rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font);
  width: 100%;
  margin-top: 0.5rem;
  transition: background .2s, color .2s;
}
.btn-login:hover { background: var(--white); color: var(--red); }
.btn-login:disabled { opacity: 0.6; cursor: not-allowed; }
.error-msg {
  color: #f87171;
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 0.75rem;
  display: none;
  text-align: center;
}
.error-msg.show { display: block; }
.back-link {
  display: block;
  text-align: center;
  margin-top: 1.5rem;
  color: var(--gray);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color .2s;
}
.back-link:hover { color: var(--white); }