:root {
  --primary: #8171D0;
  --primary-hover: #6F5DC4;
  --primary-press: #5D4DAD;
  --primary-soft: #F0EDF9;
  --primary-softer: #F6F4FC;

  --bg: #F8F6FB;
  --bg-card: #FFFFFF;
  --bg-alt: #FAF9FC;
  --text: #0F0F12;
  --text-muted: #54545E;
  --text-subtle: #8A8A93;
  --border: #ECEAF1;
  --border-strong: #DAD7E0;
  --danger: #DC2626;
  --success: #059669;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-card: 24px;

  --shadow-sm: 0 1px 2px rgba(15, 15, 18, 0.04);
  --shadow-card: 0 1px 2px rgba(15, 15, 18, 0.04), 0 12px 32px rgba(89, 75, 162, 0.06);

  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg-card);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  letter-spacing: -0.005em;
  min-height: 100vh;
}

h1, h2, h3 { font-weight: 500; letter-spacing: -0.02em; line-height: 1.15; color: var(--text); }
.serif-accent { font-family: var(--font-serif); font-style: italic; font-weight: 400; color: var(--primary); }
a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--primary-press); }
p { color: var(--text-muted); line-height: 1.6; }

/* ─────────── SHELL — split layout ─────────── */
.auth-shell {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  min-height: 100vh;
  position: relative;
}

/* ─────────── SHOWCASE (left side) ─────────── */
.auth-showcase {
  position: relative;
  padding: 56px 56px 48px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}
/* Aurora gradient — slow, subtle, breathes */
.auth-showcase::before {
  content: '';
  position: absolute;
  inset: -100px;
  background:
    radial-gradient(circle 600px at 20% 20%, rgba(129, 113, 208, 0.22) 0%, transparent 60%),
    radial-gradient(circle 500px at 80% 90%, rgba(129, 113, 208, 0.14) 0%, transparent 60%),
    radial-gradient(circle 400px at 90% 10%, rgba(167, 153, 232, 0.12) 0%, transparent 60%);
  animation: auroraDrift 24s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}
@keyframes auroraDrift {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(-30px, 20px) scale(1.05); }
  100% { transform: translate(20px, -10px) scale(1); }
}
/* Dot pattern overlay */
.auth-showcase::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(129, 113, 208, 0.16) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 90% 80% at center, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at center, black 0%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

.showcase-top, .showcase-middle, .showcase-bottom {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--primary);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: '';
  width: 24px; height: 1.5px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
}

.showcase-headline {
  font-size: clamp(32px, 3.4vw, 44px);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 14px;
}
.showcase-headline .accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--primary);
}
.showcase-sub {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 440px;
  margin-bottom: 0;
}

.showcase-middle {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 40px 0;
}

/* Query preview card — the live demo */
.demo-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(15, 15, 18, 0.04), 0 24px 56px rgba(129, 113, 208, 0.14);
  transform: rotate(-1deg);
  transition: transform 0.4s ease;
}
.demo-card:hover { transform: rotate(0deg) scale(1.01); }

.demo-input {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}
.demo-prefix {
  font-family: var(--font-mono);
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}
.demo-query {
  font-size: 14px;
  color: var(--text);
  letter-spacing: -0.005em;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.demo-caret {
  display: inline-block;
  width: 7px;
  height: 14px;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.demo-time {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-subtle);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.demo-time::before {
  content: '';
  width: 4px; height: 4px;
  background: var(--primary);
  border-radius: 50%;
}

.demo-response {
  padding: 18px;
  display: flex;
  gap: 12px;
}
.demo-avatar {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-press) 100%);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(129, 113, 208, 0.25);
}
.demo-response-body { flex: 1; min-width: 0; }
.demo-response-text {
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 10px;
}
.demo-response-text strong {
  font-weight: 600;
  color: var(--primary);
}
.demo-stats { display: flex; flex-wrap: wrap; gap: 5px; }
.demo-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding: 4px 9px;
  background: var(--primary-softer);
  border-radius: 999px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.demo-stat strong {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 13px;
  color: var(--primary);
  font-weight: 400;
}

/* Floating mini-cards behind demo for depth */
.demo-orbit-card {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-muted);
  box-shadow: 0 8px 24px rgba(89, 75, 162, 0.1);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 0;
}
.demo-orbit-card .mini-mark {
  width: 18px; height: 18px;
  border-radius: 5px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-press) 100%);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 11px;
  font-weight: 600;
}
.demo-orbit-card.top { top: -18px; left: -28px; transform: rotate(-4deg); animation: float1 6s ease-in-out infinite; }
.demo-orbit-card.bottom { bottom: -16px; right: -22px; transform: rotate(3deg); animation: float2 7s ease-in-out infinite; }
@keyframes float1 {
  0%, 100% { transform: rotate(-4deg) translateY(0); }
  50% { transform: rotate(-4deg) translateY(-8px); }
}
@keyframes float2 {
  0%, 100% { transform: rotate(3deg) translateY(0); }
  50% { transform: rotate(3deg) translateY(6px); }
}

.demo-wrap { position: relative; width: 100%; max-width: 440px; padding: 24px 32px; }

/* Trust footer */
.showcase-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 12.5px;
  color: var(--text-muted);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.trust-item strong { color: var(--text); font-weight: 600; }
.trust-stars {
  display: inline-flex;
  align-items: center;
  gap: 1px;
}
.trust-stars .star {
  color: var(--primary);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 14px;
  line-height: 1;
}
.trust-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.18);
  animation: livePulse 2.4s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(5, 150, 105, 0.06); }
}

/* ─────────── FORM SIDE (right) ─────────── */
.auth-form-side {
  background: var(--bg-card);
  padding: 36px 56px 48px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.form-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 16px; letter-spacing: -0.02em;
  color: var(--text);
}
.logo-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-press) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; font-weight: 700;
  font-family: var(--font-serif); font-style: italic;
  line-height: 1;
  box-shadow: 0 2px 6px rgba(129, 113, 208, 0.25);
}
.form-top-aux {
  font-size: 13px;
  color: var(--text-subtle);
  display: flex;
  align-items: center;
  gap: 6px;
}
.form-top-aux a { color: var(--text); font-weight: 500; }
.form-top-aux a:hover { color: var(--primary); }

/* Form container — centered, max-width */
.form-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 400px;
  width: 100%;
  margin: 0 auto;
}

.form-heading {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 6px;
}
.form-heading .accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--primary);
}
.form-subheading {
  font-size: 14.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Tab switcher */
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-alt);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 24px;
  position: relative;
}
.tab {
  background: transparent;
  border: none;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 7px;
  transition: all 0.2s;
  letter-spacing: -0.005em;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--bg-card);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 15, 18, 0.06);
  font-weight: 600;
}

/* OAuth buttons */
.oauth-stack { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: -0.005em;
  position: relative;
}
.oauth-btn:hover {
  border-color: var(--text);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 15, 18, 0.06);
}
.oauth-btn:active { transform: translateY(0); }
.oauth-btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.oauth-btn .recommended-tag {
  position: absolute;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--primary);
  background: var(--primary-softer);
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

/* "or" divider */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0 18px;
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Form fields */
.form-group { margin-bottom: 14px; }
.form-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.005em;
}
.form-label .forgot-link {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}
.form-label .forgot-link:hover { color: var(--primary); }

.input-wrap { position: relative; }
.form-input {
  width: 100%;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 11px 14px;
  outline: none;
  transition: all 0.15s;
  letter-spacing: -0.005em;
}
.form-input::placeholder { color: var(--text-subtle); }
.form-input:hover { border-color: var(--text-subtle); }
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-softer);
}
.form-input.has-icon { padding-right: 40px; }

.input-icon-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-subtle);
  transition: all 0.15s;
}
.input-icon-btn:hover { color: var(--text); background: var(--bg-alt); }
.input-icon-btn svg { width: 16px; height: 16px; }

/* Remember me checkbox */
.remember-row {
  display: flex;
  align-items: center;
  margin-bottom: 18px;
}
.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}
.checkbox-wrap input { position: absolute; opacity: 0; width: 0; height: 0; }
.custom-checkbox {
  width: 18px; height: 18px;
  border: 1.5px solid var(--border-strong);
  border-radius: 5px;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}
.custom-checkbox svg {
  width: 11px; height: 11px;
  color: #fff;
  opacity: 0;
  transition: opacity 0.15s;
}
.checkbox-wrap:hover .custom-checkbox { border-color: var(--primary); }
.checkbox-wrap input:checked + .custom-checkbox {
  background: var(--primary);
  border-color: var(--primary);
}
.checkbox-wrap input:checked + .custom-checkbox svg { opacity: 1; }
.checkbox-wrap input:focus-visible + .custom-checkbox {
  box-shadow: 0 0 0 3px var(--primary-softer);
}
.checkbox-label {
  font-size: 13.5px;
  color: var(--text-muted);
  letter-spacing: -0.005em;
}

/* Submit button */
.submit-btn {
  width: 100%;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 500;
  padding: 12px 20px;
  border-radius: 10px;
  border: none;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 0 1px 2px rgba(89, 75, 162, 0.2), inset 0 1px 0 rgba(255,255,255,0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: -0.005em;
  margin-bottom: 16px;
}
.submit-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(89, 75, 162, 0.25);
}
.submit-btn:active { transform: translateY(0); }
.submit-btn svg { transition: transform 0.15s; width: 14px; height: 14px; }
.submit-btn:hover svg { transform: translateX(2px); }
.submit-btn .spinner {
  display: none;
  width: 14px; height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.submit-btn.loading .submit-text,
.submit-btn.loading svg.arrow { display: none; }
.submit-btn.loading .spinner { display: inline-block; }

/* Footer of form */
.form-foot-link {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 16px;
}
.form-foot-link a { color: var(--text); font-weight: 600; }
.form-foot-link a:hover { color: var(--primary); }

.legal-note {
  font-size: 11.5px;
  color: var(--text-subtle);
  text-align: center;
  line-height: 1.55;
  letter-spacing: -0.005em;
  max-width: 340px;
  margin: 0 auto;
}
.legal-note a { color: var(--text-muted); text-decoration: underline; text-decoration-color: var(--border-strong); }
.legal-note a:hover { color: var(--primary); text-decoration-color: var(--primary); }

/* Form-side footer (security badges) */
.form-foot-secure {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-subtle);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}
.form-foot-secure .sep { opacity: 0.4; }
.form-foot-secure .lock {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.form-foot-secure .lock svg { width: 11px; height: 11px; }

/* Sign-up specific: hide on sign-in */
[data-mode="signin"] .signup-only { display: none; }
[data-mode="signup"] .signin-only { display: none; }

/* ─────────── RESPONSIVE ─────────── */
@media (max-width: 940px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-showcase { display: none; }
  .auth-form-side { padding: 32px 28px 40px; min-height: 100vh; }
  .form-top { margin-bottom: 32px; }
  .form-wrap { max-width: 380px; }
}
@media (max-width: 480px) {
  .auth-form-side { padding: 24px 20px 32px; }
  .form-heading { font-size: 24px; }
  .form-top-aux { font-size: 12px; }
  .form-foot-secure { gap: 12px; font-size: 9.5px; flex-wrap: wrap; justify-content: center; }
}