:root {
  color-scheme: dark;
  --text: #f1f6ff;
  --muted: #aab6c7;
  --line: rgba(74, 83, 100, 0.48);
  --panel: rgba(18, 23, 31, 0.86);
  --panel-strong: rgba(22, 27, 36, 0.95);
  --cyan: #66d4ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px circle at -10% 8%, rgba(28, 46, 76, 0.75) 0%, transparent 82%),
    radial-gradient(900px circle at 115% 90%, rgba(40, 26, 63, 0.6) 0%, transparent 58%),
    linear-gradient(180deg, #090a0c 0%, #0b0d11 100%);
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.44), transparent 88%);
  opacity: 0.32;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.82;
}

.auth-page {
  position: relative;
  z-index: 2;
  min-height: 100vh;
}

.auth-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px clamp(18px, 5vw, 64px);
}

.brand,
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.brand {
  gap: 10px;
  margin-right: auto;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.nav-link {
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: linear-gradient(180deg, rgba(43, 49, 59, 0.82), rgba(35, 40, 49, 0.82));
}

.auth-shell {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(36px, 8vw, 94px) 0 70px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 7px 11px;
  border: 1px solid rgba(102, 212, 255, 0.28);
  border-radius: 999px;
  color: #b8eaff;
  background: rgba(255, 255, 255, 0.04);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0;
  max-width: 620px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 0.98;
  letter-spacing: 0;
}

.auth-copy p:not(.eyebrow) {
  max-width: 560px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}

.auth-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    radial-gradient(circle at top right, rgba(79, 163, 255, 0.12), transparent 38%),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(14px);
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 18px;
}

.auth-tab,
.button {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.auth-tab {
  color: #d7e8f5;
  background: linear-gradient(180deg, rgba(43, 49, 59, 0.92), rgba(35, 40, 49, 0.92));
  opacity: 1;
}

.auth-tab.is-active {
  color: var(--text);
  border-color: rgba(102, 212, 255, 0.38);
  background: rgba(79, 163, 255, 0.12);
}

.auth-tab:not(.is-active):hover,
.auth-tab:not(.is-active):focus-visible {
  color: var(--text);
  border-color: rgba(102, 212, 255, 0.36);
  background: rgba(79, 163, 255, 0.1);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form.is-hidden {
  display: none;
}

.is-hidden {
  display: none !important;
}

.auth-tabs.is-hidden {
  display: none;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  line-height: 1.4;
}

.checkbox-label input {
  width: 18px;
  min-height: 18px;
  height: 18px;
  accent-color: var(--cyan);
}

.optional-label {
  color: rgba(170, 182, 199, 0.72);
  font-size: 12px;
  font-weight: 600;
}

input {
  width: 100%;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(8, 12, 17, 0.72);
  color: var(--text);
  padding: 0 12px;
  font: inherit;
  outline: none;
}

input:focus {
  border-color: rgba(102, 212, 255, 0.58);
  box-shadow: 0 0 0 3px rgba(102, 212, 255, 0.12);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: #f5fbff;
  text-decoration: none;
}

.button.primary {
  background: linear-gradient(180deg, #225981, #183f5d);
  border-color: rgba(95, 168, 225, 0.44);
}

.button.provider {
  color: #d7e8f5;
  background: linear-gradient(180deg, rgba(43, 49, 59, 0.92), rgba(35, 40, 49, 0.92));
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 13px;
}

.divider::before,
.divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.provider-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.auth-status {
  min-height: 42px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.auth-status.is-error {
  color: #ffb7c0;
}

.signed-in-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

@media (max-width: 820px) {
  .auth-nav {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 16px;
  }

  .brand {
    flex-basis: 100%;
  }

  .auth-shell {
    grid-template-columns: 1fr;
  }
}