/* ======================================
   LOGIN — MOBILE FIRST (INSPIRED BY CHAT)
====================================== */

:root {
  --bg: #020617;
  --card: #0f172a;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 20px 50px rgba(0,0,0,0.45);
}

/* ===== RESET BÁSICO ===== */

* {
  box-sizing: border-box;
}

/* ===== FUNDO ===== */

body {
  margin: 0;
  height: 100dvh;
  background:
    radial-gradient(circle at top, #020617 0%, #000 60%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);

  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== CARD LOGIN ===== */

.login-box {
  width: 100%;
  max-width: 420px;
  padding: 28px 24px 30px;

  background: linear-gradient(
    180deg,
    #020617,
    var(--card)
  );

  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);

  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ===== TÍTULO ===== */

.login-box h2 {
  margin: 0 0 6px;
  text-align: center;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* ===== INPUT ===== */

.login-box input {
  width: 100%;
  padding: 14px 14px;
  font-size: 16px; /* evita zoom iOS */

  border-radius: 14px;
  border: 1px solid var(--border);

  background: rgba(255,255,255,0.06);
  color: var(--text);

  outline: none;
}

.login-box input::placeholder {
  color: var(--muted);
}

.login-box input:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,0.08);
}

/* ===== BOTÃO ===== */

.login-box button {
  margin-top: 6px;
  padding: 14px;
  border-radius: 14px;

  border: none;
  cursor: pointer;

  background: var(--primary);
  color: #fff;

  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.3px;

  transition: background 0.2s ease, transform 0.1s ease;
}

.login-box button:hover {
  background: var(--primary-hover);
}

.login-box button:active {
  transform: scale(0.98);
}

/* ===== ERRO ===== */

#erro {
  min-height: 18px;
  text-align: center;
  font-size: 14px;
  color: #f87171;
}

/* ======================================
   AJUSTES TELAS MUITO PEQUENAS
====================================== */

@media (max-width: 420px) {

  .login-box {
    margin: 16px;
    padding: 26px 20px;
    border-radius: 16px;
  }

  .login-box h2 {
    font-size: 21px;
  }
}