/* ============================================================================
   Prism Journal — shared design system
   ----------------------------------------------------------------------------
   Extracted from the landing page so login/account/devices share the same
   glassmorphic aesthetic without duplicating 1,200 lines of CSS per page.
   Owns: tokens, base typography, body aurora, container, nav, glass cards,
   buttons, form inputs, footer. Page-specific styles live inline in each
   HTML file.
   ============================================================================ */

:root {
  --bg-world:#e8edf5;
  --bg-card:rgba(255,255,255,0.55);
  --bg-card-hover:rgba(255,255,255,0.75);
  --bg-glass:rgba(255,255,255,0.38);
  --bg-glass-strong:rgba(255,255,255,0.58);
  --border:rgba(255,255,255,0.65);
  --border-subtle:rgba(180,195,220,0.35);
  --shadow-card:0 2px 24px rgba(100,120,170,0.08),0 0 0 1px rgba(255,255,255,0.55) inset;
  --shadow-lg:0 8px 40px rgba(100,120,170,0.13),0 0 0 1px rgba(255,255,255,0.65) inset;
  --shadow-xl:0 25px 90px rgba(100,120,170,0.22),0 0 0 1px rgba(255,255,255,0.75) inset;
  --text-primary:#1a1f36;
  --text-secondary:#4a5068;
  --text-tertiary:#7e86a0;
  --accent:#5b6ef5;
  --accent-soft:rgba(91,110,245,0.1);
  --accent-strong:#4452d9;
  --green:#22c55e;
  --green-text:#16a34a;
  --green-soft:rgba(34,197,94,0.1);
  --red:#ef4444;
  --red-text:#dc2626;
  --red-soft:rgba(239,68,68,0.08);
  --yellow:#f59e0b;
  --yellow-soft:rgba(245,158,11,0.12);
  --purple:#8b5cf6;
  --purple-soft:rgba(139,92,246,0.1);
  --teal:#06b6d4;
  --orange:#fb923c;
  --pink:#ec4899;
  --radius-sm:14px;
  --radius-md:18px;
  --radius-lg:24px;
  --radius-xl:30px;
  --font-body:'DM Sans',-apple-system,system-ui,sans-serif;
  --font-display:'Newsreader', Georgia, serif;
  --font-num:'JetBrains Mono',ui-monospace,monospace;
  --transition:0.22s cubic-bezier(0.4,0,0.2,1);
  --blur:blur(28px);
  /* Display weight system (mirrors landing). 550 upright / 450 italic / 600 numerics. */
  --w-display:550;
  --w-display-italic:450;
  --w-display-num:600;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:17px}
@media(min-width:1400px){html{font-size:17.5px}}

body{
  font-family:var(--font-body);
  background:var(--bg-world);
  color:var(--text-primary);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  overflow-x:hidden;
}
/* Aurora background — 4 colored radial ellipses on a cool-grey base. */
body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:-2;
  background-image:
    radial-gradient(ellipse 1600px 1200px at 8% 15%,#d5dff8 0%,transparent 55%),
    radial-gradient(ellipse 1200px 900px at 85% 5%,#e6daf5 0%,transparent 50%),
    radial-gradient(ellipse 1400px 1000px at 50% 90%,#d0e8f0 0%,transparent 55%),
    radial-gradient(ellipse 1000px 800px at 95% 75%,#e0d8f2 0%,transparent 45%);
}
/* SVG noise overlay for subtle film grain. */
body::after{
  content:'';
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:0.35;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.5 0 0 0 0 0.55 0 0 0 0 0.7 0 0 0 0.09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
::selection{background:rgba(91,110,245,0.25);color:var(--text-primary)}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.container-narrow{max-width:540px}
.container-medium{max-width:840px}
@media(max-width:720px){.container,.container-narrow,.container-medium{padding:0 20px}}

/* ── Italic display swap (used for emphasis spans) ───────────────────────── */
.italic-swap{
  font-family:var(--font-display);
  font-style:italic;
  font-weight:var(--w-display-italic);
  letter-spacing:-0.015em;
}

/* ── Brand gradient text utility ─────────────────────────────────────────── */
.gradient-text{
  background:linear-gradient(135deg,var(--orange) 0%,var(--pink) 45%,var(--purple) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  display:inline-block;
}

/* ── Navigation (sticky pill, identical to landing) ─────────────────────── */
nav.prism-nav{
  position:sticky;
  top:20px;
  z-index:50;
  width:min(1200px, calc(100% - 40px));
  margin:20px auto 0;
  padding:10px 20px;
  display:flex;
  align-items:center;
  gap:24px;
  background:var(--bg-glass-strong);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
  border:1px solid var(--border);
  border-radius:100px;
  box-shadow:var(--shadow-card);
}
.logo-lockup{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}
.logo-mark{width:28px;height:28px;flex-shrink:0}
.logo-name{
  font-family:var(--font-display);
  font-weight:var(--w-display);
  font-size:1.2rem;
  letter-spacing:-0.02em;
  line-height:1;
  font-variation-settings:"opsz" 24;
}
nav.prism-nav .nav-links{display:flex;gap:4px;margin-left:auto}
nav.prism-nav .nav-links a{
  padding:6px 14px;
  border-radius:100px;
  color:var(--text-secondary);
  text-decoration:none;
  font-size:0.92rem;
  font-weight:500;
  transition:var(--transition);
}
nav.prism-nav .nav-links a:hover{background:var(--bg-glass);color:var(--text-primary)}
nav.prism-nav .nav-cta{
  padding:7px 16px;
  background:var(--text-primary);
  color:var(--bg-world);
  border-radius:100px;
  text-decoration:none;
  font-size:0.92rem;
  font-weight:600;
  transition:var(--transition);
  cursor:pointer;
  border:none;
  font-family:inherit;
}
nav.prism-nav .nav-cta:hover{background:var(--accent);color:#fff}
nav.prism-nav .nav-cta.danger:hover{background:var(--red);color:#fff}
@media(max-width:720px){
  nav.prism-nav{padding:9px 14px;gap:10px}
  nav.prism-nav .nav-links{display:none}
  .logo-name{font-size:1.05rem}
}

/* ── Display headings ────────────────────────────────────────────────────── */
.h-display{
  font-family:var(--font-display);
  font-weight:var(--w-display);
  letter-spacing:-0.025em;
  line-height:1.08;
  font-variation-settings:"opsz" 72;
}
.h-display-xl{font-size:clamp(2rem,4vw,3rem)}
.h-display-lg{font-size:clamp(1.65rem,3vw,2.3rem)}
.h-display-md{font-size:clamp(1.3rem,2vw,1.6rem)}

/* ── Glass card ──────────────────────────────────────────────────────────── */
.glass-card{
  background:var(--bg-card);
  backdrop-filter:var(--blur);
  -webkit-backdrop-filter:var(--blur);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  padding:32px;
}
.glass-card.glass-card-lg{padding:48px;border-radius:var(--radius-xl);box-shadow:var(--shadow-lg)}
@media(max-width:720px){
  .glass-card{padding:24px}
  .glass-card.glass-card-lg{padding:28px}
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  background:var(--bg-glass-strong);
  border:1px solid var(--border);
  color:var(--text-primary);
  border-radius:var(--radius-sm);
  font-size:0.95rem;
  font-weight:500;
  font-family:inherit;
  text-decoration:none;
  cursor:pointer;
  transition:var(--transition);
  backdrop-filter:blur(12px);
  white-space:nowrap;
}
.btn:hover{background:#fff;border-color:rgba(180,195,220,0.6);transform:translateY(-1px);box-shadow:var(--shadow-card)}
.btn:active{transform:translateY(0)}
.btn:disabled{opacity:0.55;cursor:not-allowed;transform:none;box-shadow:none}

.btn-primary{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
  font-weight:600;
  box-shadow:0 2px 16px rgba(91,110,245,0.25);
}
.btn-primary:hover{background:var(--accent-strong);color:#fff;border-color:var(--accent-strong);box-shadow:0 4px 20px rgba(91,110,245,0.35)}

.btn-danger{
  background:transparent;
  color:var(--red-text);
  border-color:rgba(239,68,68,0.35);
}
.btn-danger:hover{background:var(--red-soft);color:var(--red-text);border-color:var(--red);box-shadow:none}

.btn-ghost{
  background:transparent;
  border-color:transparent;
  color:var(--text-secondary);
  padding:8px 12px;
}
.btn-ghost:hover{background:var(--bg-glass);color:var(--text-primary);box-shadow:none;transform:none}

.btn-block{width:100%}
.btn-lg{padding:14px 28px;font-size:1.02rem}
.btn-sm{padding:7px 14px;font-size:0.86rem}

/* ── Form fields ─────────────────────────────────────────────────────────── */
.field{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin-bottom:18px;
}
.field-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
@media(max-width:560px){.field-row{grid-template-columns:1fr}}

.field label, .field-label{
  font-size:0.78rem;
  color:var(--text-tertiary);
  text-transform:uppercase;
  letter-spacing:0.09em;
  font-weight:600;
}
.input{
  width:100%;
  padding:12px 16px;
  font-size:0.98rem;
  font-family:inherit;
  color:var(--text-primary);
  background:rgba(255,255,255,0.65);
  border:1px solid var(--border-subtle);
  border-radius:var(--radius-sm);
  transition:var(--transition);
  backdrop-filter:blur(12px);
}
.input:focus{
  outline:none;
  border-color:var(--accent);
  background:#fff;
  box-shadow:0 0 0 4px var(--accent-soft);
}
.input:disabled{opacity:0.55;cursor:not-allowed}
.input::placeholder{color:var(--text-tertiary)}

/* ── Inline message banners ──────────────────────────────────────────────── */
.alert{
  padding:12px 16px;
  border-radius:var(--radius-sm);
  font-size:0.92rem;
  line-height:1.5;
  margin-bottom:16px;
  border:1px solid;
  display:flex;
  align-items:flex-start;
  gap:10px;
}
.alert-error{background:var(--red-soft);color:var(--red-text);border-color:rgba(239,68,68,0.25)}
.alert-success{background:var(--green-soft);color:var(--green-text);border-color:rgba(34,197,94,0.25)}
.alert-info{background:var(--accent-soft);color:var(--accent);border-color:rgba(91,110,245,0.25)}
.alert-warning{background:var(--yellow-soft);color:#b45309;border-color:rgba(245,158,11,0.25)}
.alert .alert-icon{flex-shrink:0;width:18px;height:18px;margin-top:1px}

/* ── Text helpers ────────────────────────────────────────────────────────── */
.t-muted{color:var(--text-tertiary)}
.t-secondary{color:var(--text-secondary)}
.t-small{font-size:0.86rem}
.t-xs{font-size:0.78rem}
.t-num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.t-center{text-align:center}
.t-right{text-align:right}
a.link{color:var(--accent);text-decoration:none;transition:var(--transition);font-weight:500}
a.link:hover{color:var(--accent-strong);text-decoration:underline}

/* ── Spacing helpers ─────────────────────────────────────────────────────── */
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mt-5{margin-top:48px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}.mb-5{margin-bottom:48px}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer.prism-footer{
  margin-top:80px;
  padding:40px 0 32px;
  border-top:1px solid var(--border-subtle);
  text-align:center;
  color:var(--text-tertiary);
  font-size:0.86rem;
}
footer.prism-footer .footer-logo{margin-bottom:12px;display:inline-flex}
footer.prism-footer .footer-links{
  display:flex;gap:18px;justify-content:center;
  margin:10px 0 14px;
  flex-wrap:wrap;
}
footer.prism-footer .footer-links a{color:var(--text-tertiary);text-decoration:none}
footer.prism-footer .footer-links a:hover{color:var(--text-primary)}

/* ── Loading spinner ─────────────────────────────────────────────────────── */
.spinner{
  display:inline-block;
  width:16px;
  height:16px;
  border:2px solid rgba(255,255,255,0.3);
  border-top-color:#fff;
  border-radius:50%;
  animation:spin 0.7s linear infinite;
}
.btn .spinner{margin-right:0}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── Auth page layout (centered card) ────────────────────────────────────── */
.auth-page{
  min-height:calc(100vh - 100px);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:60px 20px;
}
.auth-card{
  width:100%;
  max-width:440px;
}
.auth-title{
  font-family:var(--font-display);
  font-weight:var(--w-display);
  font-size:1.85rem;
  letter-spacing:-0.025em;
  line-height:1.1;
  margin-bottom:8px;
  font-variation-settings:"opsz" 48;
}
.auth-subtitle{
  color:var(--text-secondary);
  font-size:0.95rem;
  margin-bottom:28px;
}
.auth-footer-link{
  text-align:center;
  margin-top:20px;
  color:var(--text-tertiary);
  font-size:0.9rem;
}