.btn-nav { width: auto; min-height: 42px; padding: 10px 22px; font-size: 14px; }

.signup-shell {
  min-height: 100vh;
  display: grid;
  align-items: center;
  justify-content: center;
  padding: 150px 20px 80px;
}

.signup-card {
  position: relative;
  width: min(560px, 100%);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.015));
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  padding: clamp(26px, 5vw, 42px);
  box-shadow: 0 60px 120px -60px rgba(0,0,0,.95), inset 0 1px 0 rgba(255,255,255,.06);
  animation: rise .7s var(--ease) both;
  overflow: hidden;
}
.glow-card::before {
  content: ""; position: absolute; inset: 0;
  background: var(--grad-soft);
  opacity: .45;
  -webkit-mask-image: radial-gradient(130% 90% at 85% 0%, #000, transparent 72%);
  mask-image: radial-gradient(130% 90% at 85% 0%, #000, transparent 72%);
  pointer-events: none;
}
.glow-card > * { position: relative; }

@keyframes rise { from { opacity: 0; transform: translateY(24px) scale(.985); } to { opacity: 1; transform: none; } }

.signup-head { margin-bottom: 28px; }
.signup-head h1 { margin: 16px 0 8px; font-size: clamp(2rem, 5vw, 2.6rem); }

.signup-form { display: grid; gap: 16px; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.field { display: grid; gap: 7px; }
.field label { font-size: 13px; font-weight: 500; color: var(--ink-soft); letter-spacing: .01em; }

.input-prefix { position: relative; }
.input-prefix span { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--ink-mute); font-family: var(--font-mono); font-size: 15px; pointer-events: none; }
.input-prefix input { padding-left: 38px; }

.field input, .field select {
  width: 100%;
  height: 50px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.035);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color .3s, box-shadow .3s, background .3s, transform .25s var(--ease);
}
.field input::placeholder { color: var(--ink-mute); }
.field select { appearance: none; -webkit-appearance: none; cursor: pointer; color: var(--ink); }
.field select option { background: #0a0d18; color: var(--ink); }

.field input:hover, .field select:hover { border-color: rgba(76,141,255,.5); }
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--acc);
  background: rgba(76,141,255,.06);
  box-shadow: 0 0 0 4px rgba(76,141,255,.14);
}
.field.invalid input, .field.invalid select { border-color: rgba(255,107,107,.7); box-shadow: 0 0 0 4px rgba(255,107,107,.12); }
.field.valid input { border-color: rgba(47,230,167,.55); }

.input-wrap { position: relative; }
.input-wrap input { padding-right: 50px; }
.toggle-pass {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  width: 38px; height: 38px; display: grid; place-items: center;
  border: none; border-radius: 10px; background: transparent; color: var(--ink-mute);
  cursor: pointer; transition: color .25s, background .25s;
}
.toggle-pass:hover { color: var(--ink); background: var(--surface-2); }
.toggle-pass svg { width: 19px; height: 19px; }

.field-msg { min-height: 14px; font-size: 12px; color: #ff6b6b; opacity: 0; transform: translateY(-3px); transition: opacity .25s, transform .25s; }
.field-msg.show { opacity: 1; transform: none; }
.field-msg.ok { color: #2fe6a7; }

.strength { height: 4px; border-radius: 4px; background: var(--surface-2); overflow: hidden; margin-top: 2px; }
.strength span { display: block; height: 100%; width: 0; border-radius: 4px; background: var(--grad); transition: width .4s var(--ease), opacity .3s; opacity: 0; }

.terms { display: flex; align-items: flex-start; gap: 12px; cursor: pointer; color: var(--ink-soft); font-size: 13.5px; line-height: 1.5; padding: 6px 2px; }
.terms a { color: var(--acc-2); text-decoration: none; }
.terms a:hover { text-decoration: underline; }
.terms input { position: absolute; opacity: 0; width: 0; height: 0; }
.terms .check {
  flex-shrink: 0; width: 21px; height: 21px; margin-top: 1px;
  border: 1.5px solid var(--line-strong); border-radius: 6px;
  display: grid; place-items: center; background: rgba(255,255,255,.03);
  transition: border-color .25s, background .25s, box-shadow .25s;
}
.terms .check svg { width: 13px; height: 13px; stroke: #04060d; stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; opacity: 0; transform: scale(.5); transition: opacity .25s, transform .3s var(--ease); }
.terms:hover .check { border-color: var(--acc); }
.terms input:checked + .check { background: var(--grad); border-color: transparent; box-shadow: 0 0 14px var(--acc-glow); }
.terms input:checked + .check svg { opacity: 1; transform: scale(1); }
.terms.terms-error .check { border-color: rgba(255,107,107,.7); box-shadow: 0 0 0 4px rgba(255,107,107,.1); }

.btn-submit { margin-top: 6px; }
.btn-submit:active { transform: scale(.98); }

.signin-link { text-align: center; color: var(--ink-soft); font-size: 14px; }
.signin-link a { color: var(--acc-2); text-decoration: none; font-weight: 500; }
.signin-link a:hover { text-decoration: underline; }

.shake { animation: shake .45s var(--ease-soft); }
@keyframes shake { 10%, 90% { transform: translateX(-1px); } 20%, 80% { transform: translateX(2px); } 30%, 50%, 70% { transform: translateX(-4px); } 40%, 60% { transform: translateX(4px); } }

.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%) translateY(20px);
  padding: 13px 22px; border-radius: 100px; border: 1px solid rgba(47,230,167,.4);
  background: rgba(10,12,20,.9); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  color: #2fe6a7; font-weight: 600; font-size: 14px;
  box-shadow: 0 20px 50px -20px rgba(0,0,0,.9);
  opacity: 0; pointer-events: none; transition: opacity .35s, transform .35s var(--ease);
  z-index: 1200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: rgba(47,230,167,.5); color: #2fe6a7; }
.toast.error { border-color: rgba(255,107,107,.5); color: #ff6b6b; }

@media (max-width: 820px) { .nav .btn-nav { display: none; } }
@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
  .signup-shell { padding-top: 128px; align-items: start; }
  .btn-nav { display: none; }
}