/* Vértebra V10 · premium client access */
:root {
  --color-bg: #f7f9fc;
  --color-surface: #edf3fb;
  --color-ink: #07162f;
  --color-ink-soft: #53637a;
  --color-cobalt: #2f6bff;
  --color-cobalt-deep: #1747c8;
  --color-cobalt-light: #9fc5ff;
  --color-signal: #ff6b4a;
  --color-on-cobalt: #f7faff;
  --color-line: #cfdaea;
}

::selection { background: var(--color-cobalt); color: #fff; }
body {
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  background: #07162f;
  font-family: "Manrope", "Inter", "Segoe UI", Arial, sans-serif;
}
body::before {
  content: "";
  position: fixed;
  z-index: -2;
  inset: 0;
  background: url("fluxo-vertebral-v10.jpg") left center / cover no-repeat;
  transform: scaleX(-1);
  opacity: .78;
}
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(90deg, #07162f 0%, rgb(7 22 47 / .9) 42%, rgb(7 22 47 / .38) 100%),
    radial-gradient(circle at 85% 18%, rgb(47 107 255 / .25), transparent 28rem);
}
.top {
  min-height: 5.2rem;
  padding: 1rem clamp(1.25rem, 4vw, 4rem);
  border-bottom: 1px solid rgb(255 255 255 / .1);
  background: rgb(7 22 47 / .52);
  backdrop-filter: blur(16px);
}
.wordmark { font-family: "Manrope", sans-serif; font-size: 1.18rem; font-weight: 750; letter-spacing: -.045em; }
.mark { width: 1.55rem; transform: rotate(-8deg); }
.mark i { background: var(--color-cobalt-light); box-shadow: none; }
.back {
  min-height: 2.7rem;
  display: inline-flex;
  align-items: center;
  padding: .65rem 1rem;
  border: 1px solid rgb(159 197 255 / .22);
  border-radius: 999px;
  color: #d9e6ff;
  background: rgb(255 255 255 / .04);
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}
.back:hover { color: #fff; border-color: rgb(159 197 255 / .5); background: rgb(47 107 255 / .12); text-decoration: none; }

main {
  width: min(calc(100% - clamp(2rem, 7vw, 7rem)), 84rem);
  margin-inline: auto;
  grid-template-columns: minmax(0, 1fr) minmax(24rem, .64fr);
  place-items: center stretch;
  gap: clamp(3rem, 8vw, 8rem);
  padding: clamp(3.5rem, 8vw, 7rem) 0 clamp(4rem, 8vw, 7rem);
}
.login-intro { color: #fff; }
.login-intro .eyebrow {
  width: fit-content;
  margin: 0 0 1.25rem;
  padding: .52rem .76rem;
  border: 1px solid rgb(159 197 255 / .3);
  border-radius: 999px;
  color: #b9d0ff;
  background: rgb(47 107 255 / .1);
  font-size: .7rem;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.login-intro h2 {
  max-width: 11ch;
  margin: 0;
  color: #fff;
  font-size: clamp(2.8rem, 5.7vw, 5.6rem);
  font-weight: 630;
  letter-spacing: -.065em;
  line-height: .97;
}
.login-intro h2 em { color: var(--color-cobalt-light); font-style: normal; }
.login-intro > p:last-child { max-width: 43ch; margin: 1.5rem 0 0; color: rgb(235 242 255 / .68); font-size: clamp(1rem, 1.4vw, 1.2rem); }

.card {
  width: 100%;
  max-width: 31rem;
  justify-self: end;
  border: 1px solid rgb(255 255 255 / .45);
  border-radius: 1.75rem;
  padding: clamp(1.7rem, 4vw, 2.6rem);
  background: rgb(247 250 255 / .95);
  box-shadow: 0 38px 120px rgb(0 7 24 / .5), inset 0 1px rgb(255 255 255 / .85);
  backdrop-filter: blur(24px) saturate(135%);
}
.kicker { color: var(--color-cobalt); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; }
h1 { font-family: "Manrope", sans-serif; font-size: clamp(1.7rem, 3vw, 2.15rem); font-weight: 680; letter-spacing: -.045em; }
.sub { color: var(--color-ink-soft); }
form { margin-top: 1.8rem; }
label { margin-bottom: .5rem; color: #25344c; font-size: .83rem; font-weight: 700; }
input {
  min-height: 3.6rem;
  padding: .8rem 1rem;
  border-color: rgb(7 22 47 / .14);
  border-radius: .9rem;
  background: #f3f6fa;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}
input:hover { border-color: rgb(47 107 255 / .38); background: #fff; }
input:focus { border-color: var(--color-cobalt); background: #fff; box-shadow: 0 0 0 4px rgb(47 107 255 / .1); }
button {
  min-height: 3.65rem;
  margin-top: .45rem;
  border-radius: 999px;
  background: linear-gradient(115deg, var(--color-cobalt), var(--color-cobalt-deep));
  box-shadow: 0 16px 38px rgb(47 107 255 / .26);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
button:hover { transform: translateY(-2px); background: linear-gradient(115deg, #1747c8, #0d338f); box-shadow: 0 20px 48px rgb(47 107 255 / .34); }
.note svg { color: var(--color-cobalt); }
.demo { border-color: rgb(7 22 47 / .1); }
.demo a { color: var(--color-cobalt-deep); text-underline-offset: .25rem; }

@media (max-width: 52rem) {
  body::before { background-size: auto 50%; background-position: left bottom; opacity: .38; }
  main { grid-template-columns: 1fr; gap: 2.5rem; place-items: stretch; }
  .login-intro h2 { max-width: 13ch; }
  .card { max-width: 34rem; justify-self: start; }
}

@media (max-width: 36rem) {
  .top { min-height: 4.5rem; }
  .back { padding: .55rem .75rem; font-size: .78rem; }
  main { width: min(calc(100% - 1.5rem), 84rem); padding-block: 2.5rem 3rem; }
  .login-intro h2 { font-size: clamp(2.5rem, 13vw, 3.6rem); }
  .login-intro > p:last-child { font-size: .96rem; }
  .card { border-radius: 1.35rem; }
}

@media (prefers-reduced-motion: reduce) {
  .back, input, button { transition: none; }
  button:hover { transform: none; }
}