/* ==========================================================
   Vector OS — Sign in
   ========================================================== */
:root {
  --ink: #16132b;
  --ink-soft: #4a4560;
  --ink-muted: #8b87a0;

  --violet-900: #241f47;
  --violet-700: #4c2fb0;
  --violet-500: #6d4aff;
  --violet-400: #8f6bff;
  --violet-200: #cabbff;
  --violet-100: #ece5ff;

  --card-bg: #ffffff;
  --card-border: #ecebf3;
  --input-border: #e2e0ee;
  --input-bg: #fbfaff;

  --radius-lg: 20px;
  --radius-md: 13px;
  --radius-sm: 9px;

  --shadow-card: 0 20px 60px -20px rgba(36, 22, 90, 0.28), 0 2px 8px rgba(36, 22, 90, 0.06);
  --shadow-btn: 0 10px 24px -8px rgba(76, 47, 176, 0.55);

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: var(--font-sans);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--violet-500);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ==========================================================
   Shell
   ========================================================== */
.login-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(400px, 620px);
  min-height: 100vh;
  background: #fdfcff;
}

/* ==========================================================
   Hero (network side)
   ========================================================== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 100% at 0% 0%, #ded3ff 0%, #f4f1fd 38%, #fbfaff 62%, #ffffff 100%);
  display: flex;
  flex-direction: column;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(76, 47, 176, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(76, 47, 176, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(120% 100% at 10% 10%, black 30%, transparent 85%);
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  opacity: 0.55;
}
.hero-glow-a {
  width: 480px; height: 480px;
  top: -140px; left: -120px;
  background: radial-gradient(circle, var(--violet-400), transparent 70%);
}
.hero-glow-b {
  width: 360px; height: 360px;
  bottom: -80px; right: 10%;
  background: radial-gradient(circle, var(--violet-200), transparent 70%);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
  padding: 40px 56px 44px;
}

.hero-top .brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--violet-900), var(--violet-500));
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 6px 16px -4px rgba(76, 47, 176, 0.5);
}
.brand-name {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--ink);
}

.hero-mid { max-width: 640px; }
.hero-wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(48px, 6.4vw, 76px);
  line-height: 1;
  letter-spacing: -1.5px;
  color: var(--ink);
}
.grad-text {
  background: linear-gradient(100deg, var(--violet-700) 0%, var(--violet-500) 55%, var(--violet-400) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-tagline {
  margin: 14px 0 0;
  font-size: 17px;
  color: var(--ink-soft);
  font-weight: 400;
}

.secure-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-muted);
}
.secure-badge svg { width: 15px; height: 15px; color: var(--violet-500); }

/* ==========================================================
   Auth side
   ========================================================== */
.auth-side {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 48px;
  background: #ffffff;
  border-left: 1px solid var(--card-border);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 36px 36px 30px;
}

.auth-card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--violet-900);
}
.auth-sub {
  margin: 6px 0 26px;
  font-size: 14px;
  color: var(--ink-muted);
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 7px;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  border-radius: var(--radius-md);
  padding: 0 14px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input-wrap:focus-within {
  border-color: var(--violet-400);
  box-shadow: 0 0 0 3.5px var(--violet-100);
}
.input-wrap svg {
  width: 16px; height: 16px;
  color: var(--ink-muted);
  flex-shrink: 0;
}
.input-wrap input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 14px;
  color: var(--ink);
  padding: 12px 10px;
}
.input-wrap input::placeholder { color: #b3aec8; }

.input-icon-btn {
  border: 0;
  background: transparent;
  padding: 4px;
  display: grid;
  place-items: center;
  color: var(--ink-muted);
  border-radius: 6px;
}
.input-icon-btn:hover { color: var(--ink-soft); }
.input-icon-btn svg { width: 16px; height: 16px; }

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
}
.checkbox input {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
}
.checkbox-box {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 1.5px solid var(--input-border);
  background: #fff;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: background .15s ease, border-color .15s ease;
}
.checkbox-box svg {
  width: 12px; height: 12px;
  color: #fff;
  opacity: 0;
  transition: opacity .1s ease;
}
.checkbox input:checked + .checkbox-box {
  background: linear-gradient(145deg, var(--violet-700), var(--violet-500));
  border-color: transparent;
}
.checkbox input:checked + .checkbox-box svg { opacity: 1; }
.checkbox input:focus-visible + .checkbox-box {
  outline: 2px solid var(--violet-500);
  outline-offset: 2px;
}

.link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--violet-500);
  text-decoration: none;
}
.link:hover { text-decoration: underline; }

.form-error {
  margin: -8px 0 16px;
  font-size: 13px;
  color: #d1373f;
  background: #fdeceb;
  border-radius: var(--radius-sm);
  padding: 9px 12px;
}

.btn-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius-md);
  padding: 13px 18px;
  background: linear-gradient(115deg, var(--violet-900) 0%, var(--violet-700) 55%, var(--violet-500) 100%);
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  box-shadow: var(--shadow-btn);
  transition: transform .12s ease, filter .12s ease;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary svg { width: 16px; height: 16px; }
.btn-primary:disabled {
  opacity: 0.7;
  cursor: progress;
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0;
  color: var(--ink-muted);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--card-border);
}

.btn-google {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--input-border);
  background: #fff;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.btn-google:hover { background: #faf9ff; border-color: var(--violet-200); }
.google-icon { width: 18px; height: 18px; }

.fine-print {
  margin: 20px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.5;
}

.auth-footer {
  margin: 22px 0 0;
  font-size: 12px;
  color: var(--ink-muted);
  text-align: center;
}

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 980px) {
  .login-shell { grid-template-columns: 1fr; }
  .hero { min-height: 340px; }
  .hero-content { padding: 28px 28px 32px; }
  .hero-wordmark { font-size: clamp(40px, 12vw, 56px); }
  .hero-mid { margin-top: auto; }
  .auth-side { border-left: 0; border-top: 1px solid var(--card-border); padding: 32px 20px 40px; }
  .auth-card { padding: 28px 24px 24px; }
}

@media (max-width: 480px) {
  .field-row { flex-wrap: wrap; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-canvas { display: none; }
}