/* =====================================================================
   QuickInvoice — login-329.css
   Premium iOS-style liquid glass sign-in screen.
   ===================================================================== */

:root{
  --color-bg: #F4F6FB;
  --color-text: #171B2E;
  --color-text-secondary: #5B6478;
  --color-text-faint: #8B93A7;
  --color-accent: #4F46E5;
  --color-accent-dark: #3D34C9;
  --color-accent-soft: #EEF0FF;
  --color-coral: #FF7A59;
  --color-danger: #E11D48;
  --color-danger-soft: #FDE8EC;
  --color-success: #17A672;

  --font-display: 'Syne', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  --radius-lg: 28px;
  --radius-md: 16px;
  --shadow-glass: 0 20px 60px rgba(23,27,46,0.14), 0 4px 14px rgba(23,27,46,0.06);
  --blur-amt: 26px;
  color-scheme: light;
}

*, *::before, *::after{ box-sizing: border-box; }

body{
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}

/* ---------------------------------------------------------------------
   Ambient background — richer, layered blobs with slow drift
   --------------------------------------------------------------------- */
.bg-decor{ position: fixed; inset: 0; overflow: hidden; z-index: -1; pointer-events: none; }
.blob{ position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.4; animation: drift 22s ease-in-out infinite alternate; }
.blob-indigo{ width: 620px; height: 620px; top: -220px; left: -180px; background: radial-gradient(circle at 30% 30%, #7A73FF, #4F46E5 70%); }
.blob-coral{ width: 520px; height: 520px; bottom: -220px; right: -160px; background: radial-gradient(circle at 60% 40%, #FF9C7C, #FF7A59 70%); opacity: 0.3; animation-delay: -6s; }

@keyframes drift{
  0%{ transform: translate(0,0) scale(1); }
  100%{ transform: translate(30px,-24px) scale(1.06); }
}

/* ---------------------------------------------------------------------
   Shell
   --------------------------------------------------------------------- */
.login-shell{
  width: 100%;
  max-width: 440px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.back-home{
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.6);
}
.back-home:hover{ color: var(--color-accent-dark); }

/* ---------------------------------------------------------------------
   Glass card
   --------------------------------------------------------------------- */
.login-card{
  width: 100%;
  position: relative;
  background: rgba(255,255,255,0.62);
  backdrop-filter: blur(var(--blur-amt)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-amt)) saturate(180%);
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  padding: 46px 38px 34px;
  overflow: hidden;
}
.login-card::before{
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.9), transparent);
}

.login-content{
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
  transition: opacity .25s ease;
}

.login-logo{ border-radius: 14px; margin-bottom: 14px; box-shadow: 0 10px 26px rgba(79,70,229,0.28); }

.login-title{
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.login-sub{
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  margin: 0 0 28px;
  max-width: 320px;
  line-height: 1.5;
}

/* ---------------------------------------------------------------------
   Google button
   --------------------------------------------------------------------- */
.google-btn{
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 14px 20px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  background: #fff;
  border: 1px solid #E3E7EF;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(23,27,46,0.08);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.google-btn:hover{ transform: translateY(-1px); box-shadow: 0 12px 26px rgba(23,27,46,0.12); border-color: #CBD2E1; }
.google-btn:active{ transform: translateY(0); }
.google-btn:focus-visible{ outline: 3px solid #A5B4FC; outline-offset: 2px; }
.google-btn-icon{ display: flex; }
.google-btn-spinner{
  display: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid #D5D9E3;
  border-top-color: var(--color-accent);
}
.google-btn.is-loading .google-btn-label{ opacity: 0.5; }
.google-btn.is-loading .google-btn-icon{ opacity: 0.4; }
.google-btn.is-loading .google-btn-spinner{ display: block; animation: spin 0.7s linear infinite; }
.google-btn:disabled{ cursor: progress; }

@keyframes spin{ to{ transform: rotate(360deg); } }

.login-status{
  margin: 16px 0 0;
  padding: 10px 14px;
  font-size: 0.82rem;
  border-radius: 10px;
  background: var(--color-danger-soft);
  color: #9F1239;
  width: 100%;
}
.login-status.hidden{ display: none; }

.login-fine-print{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--color-text-faint);
  margin: 26px 0 0;
  line-height: 1.4;
  text-align: left;
}
.login-fine-print svg{ flex-shrink: 0; color: var(--color-success); margin-top: 2px; }

.login-footnote{
  font-size: 0.8rem;
  color: var(--color-text-faint);
}
.login-footnote a{ color: var(--color-accent-dark); font-weight: 600; text-decoration: none; }
.login-footnote a:hover{ text-decoration: underline; }

/* ---------------------------------------------------------------------
   Auth-check loading state (shown briefly while Firebase resolves
   whether a session already exists)
   --------------------------------------------------------------------- */
.login-check-spinner{
  display: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid var(--color-accent-soft);
  border-top-color: var(--color-accent);
  margin: 40px auto;
  animation: spin 0.8s linear infinite;
}
.login-card.is-checking .login-check-spinner{ display: block; }
.login-card.is-checking .login-content{ display: none; }

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}

@media (max-width: 480px){
  .login-card{ padding: 36px 24px 28px; }
}