:root {
  --c-bg:        #0f172a;
  --c-bg-2:      #1e293b;
  --c-primary:   #2563eb;
  --c-primary-2: #1d4ed8;
  --c-accent:    #38bdf8;
  --c-text:      #0f172a;
  --c-text-mut:  #64748b;
  --c-border:    #e2e8f0;
  --c-surface:   #ffffff;
  --c-error-bg:  #fee2e2;
  --c-error-tx:  #b91c1c;
  --c-ok-bg:     #dcfce7;
  --c-ok-tx:     #15803d;
  --shadow-lg:   0 20px 50px -20px rgba(15, 23, 42, .35);
  --radius:      14px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  color: var(--c-text);
  background: #f1f5f9;
}

/* -------- shell -------- */
.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
}

/* -------- lado esquerdo (marca) -------- */
.login-brand {
  position: relative;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(56, 189, 248, .25), transparent 60%),
    radial-gradient(700px 400px at 10% 110%, rgba(37, 99, 235, .35), transparent 60%),
    linear-gradient(135deg, var(--c-bg) 0%, var(--c-bg-2) 100%);
  color: #e2e8f0;
  padding: 56px 64px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.login-brand::before,
.login-brand::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: .15;
}
.login-brand::before {
  width: 320px; height: 320px;
  background: var(--c-accent);
  top: -80px; right: -80px;
}
.login-brand::after {
  width: 240px; height: 240px;
  background: var(--c-primary);
  bottom: -60px; left: -40px;
}

.brand-content { position: relative; z-index: 1; max-width: 460px; }

.brand-logo {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: grid; place-items: center;
  box-shadow: 0 10px 30px -10px rgba(56,189,248,.6);
  margin-bottom: 28px;
}
.brand-mark {
  color: #fff; font-weight: 800; font-size: 32px; letter-spacing: -1px;
}

.login-brand h1 {
  font-size: 38px;
  letter-spacing: -.5px;
  margin: 0 0 12px;
  color: #fff;
}
.brand-tagline {
  font-size: 17px;
  line-height: 1.5;
  color: #cbd5e1;
  margin: 0 0 32px;
}

.brand-features {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  gap: 12px;
}
.brand-features li {
  position: relative;
  padding-left: 28px;
  color: #e2e8f0;
  font-size: 15px;
}
.brand-features li::before {
  content: "";
  position: absolute;
  left: 0; top: 6px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  box-shadow: 0 0 0 4px rgba(56,189,248,.12);
}

.brand-foot {
  position: relative; z-index: 1;
  font-size: 13px;
  color: #94a3b8;
}

/* -------- lado direito (form) -------- */
.login-form-wrap {
  display: grid;
  place-items: center;
  padding: 40px 24px;
  background: #f1f5f9;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--c-surface);
  border-radius: var(--radius);
  padding: 40px 36px 32px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.login-card-head h2 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: -.4px;
}
.login-card-head p {
  margin: 0;
  color: var(--c-text-mut);
  font-size: 14px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 13px;
  font-weight: 600;
  color: #334155;
}
.field input[type="email"],
.field input[type="password"],
.field input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-border);
  border-radius: 10px;
  font-size: 15px;
  background: #f8fafc;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.field input:focus {
  outline: none;
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.input-wrap { position: relative; }
.input-wrap input { padding-right: 44px; }
.toggle-pass {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  color: var(--c-text-mut);
  cursor: pointer;
  border-radius: 8px;
}
.toggle-pass:hover { background: #f1f5f9; color: var(--c-primary); }

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #334155;
  cursor: pointer;
  user-select: none;
}
.check input { accent-color: var(--c-primary); }

.link-muted {
  color: var(--c-primary);
  text-decoration: none;
  font-weight: 500;
}
.link-muted:hover { text-decoration: underline; }

.btn-primary {
  position: relative;
  margin-top: 6px;
  width: 100%;
  padding: 13px 16px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-2));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .2px;
  cursor: pointer;
  transition: transform .05s, box-shadow .15s, opacity .15s;
  box-shadow: 0 10px 24px -12px rgba(37,99,235,.7);
}
.btn-primary:hover { box-shadow: 0 14px 28px -14px rgba(37,99,235,.9); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: .7; cursor: not-allowed; }

.btn-primary .btn-spinner {
  display: none;
  position: absolute;
  right: 18px; top: 50%;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  transform: translateY(-50%);
  animation: spin .7s linear infinite;
}
.btn-primary.loading .btn-spinner { display: block; }
.btn-primary.loading .btn-label { opacity: .85; }

@keyframes spin { to { transform: translateY(-50%) rotate(360deg); } }

.alerta {
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--c-error-bg);
  color: var(--c-error-tx);
  border: 1px solid #fecaca;
}
.alerta.ok {
  background: var(--c-ok-bg);
  color: var(--c-ok-tx);
  border-color: #bbf7d0;
}

.login-foot {
  font-size: 12px;
  color: var(--c-text-mut);
  text-align: center;
  margin: 8px 0 0;
}
.login-foot code {
  background: #f1f5f9;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
}

/* -------- responsivo -------- */
@media (max-width: 960px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-brand { padding: 40px 28px; }
  .login-brand h1 { font-size: 30px; }
  .brand-features { display: none; }
  .brand-foot { display: none; }
}
@media (max-width: 480px) {
  .login-card { padding: 28px 22px; border-radius: 12px; }
  .login-card-head h2 { font-size: 22px; }
}