/* ─────────────────────────────────────────────────────────────
   login_v2.css — login screen (first screen of the v2 design
   system). Self-contained (does not import main.css/auth.css).
   Component classes are namespaced .lv2-*; design tokens use the
   shared --v2-* vocabulary (same names/values as main.css).

   Theme tokens: light is the default, dark overrides via
   prefers-color-scheme. The canvas background reads the --v2-net-*
   tokens at runtime, so it re-themes automatically too.
   ───────────────────────────────────────────────────────────── */

/* Every pair is light-dark(light, dark); color-scheme decides which side
   applies. html[data-theme] (set by theme.js from localStorage 'pt-theme')
   forces a scheme; no attribute = follow the OS. */
:root {
  color-scheme: light dark;

  /* surfaces */
  --v2-bg:           light-dark(#eef2f8, #070b14);
  --v2-bg-glow:      radial-gradient(1100px 700px at 70% -10%,
                        light-dark(#dbeafe, rgba(29, 78, 216, 0.18)) 0%, transparent 60%),
                      radial-gradient(900px 600px at -10% 110%,
                        light-dark(#ccfbf1, rgba(13, 148, 136, 0.14)) 0%, transparent 55%);
  --v2-card-bg:      light-dark(rgba(255, 255, 255, 0.62), rgba(15, 23, 38, 0.55));
  --v2-card-border:  light-dark(rgba(13, 27, 42, 0.10), rgba(232, 238, 247, 0.10));
  --v2-card-shadow:  0 24px 70px -29px light-dark(rgba(13, 27, 42, 0.35), rgba(0, 0, 0, 0.8));
  --v2-input-bg:     light-dark(rgba(255, 255, 255, 0.75), rgba(7, 11, 20, 0.55));
  --v2-input-border: light-dark(rgba(13, 27, 42, 0.14), rgba(232, 238, 247, 0.14));

  /* ink */
  --v2-text:         light-dark(#0d1b2a, #e8eef7);
  --v2-text-dim:     light-dark(#5a6b80, #8b9bb0);
  --v2-text-faint:   light-dark(#8595a8, #5f7088);

  /* brand */
  --v2-accent:       light-dark(#0561c4, #00d4ff);
  --v2-accent-2:     light-dark(#0891b2, #7c8cff);
  --v2-btn-grad:     linear-gradient(135deg,
                        light-dark(#1d6ae5, #0ea5e9) 0%,
                        light-dark(#0891b2, #00d4ff) 100%);
  --v2-btn-text:     light-dark(#ffffff, #04121c);
  --v2-focus-ring:   light-dark(rgba(8, 145, 178, 0.45), rgba(0, 212, 255, 0.45));

  /* state */
  --v2-error-bg:     light-dark(rgba(190, 24, 60, 0.08), rgba(251, 113, 133, 0.10));
  --v2-error-border: light-dark(rgba(190, 24, 60, 0.30), rgba(251, 113, 133, 0.35));
  --v2-error-text:   light-dark(#be123c, #fda4af);
  --v2-ok:           light-dark(#059669, #34d399);

  /* canvas network (read by login_v2_bg.js) */
  --v2-net-node:     light-dark(rgba(5, 97, 196, 0.55), rgba(0, 212, 255, 0.55));
  --v2-net-edge:     light-dark(rgba(13, 27, 42, 0.16), rgba(148, 184, 220, 0.10));
  --v2-net-link:     light-dark(rgba(8, 145, 178, 0.45), rgba(0, 212, 255, 0.35));
  --v2-net-pulse:    light-dark(rgba(8, 145, 178, 0.9), rgba(0, 212, 255, 0.95));
}

/* User preference (Account → Appearance). No attribute = follow the OS. */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* ── base ─────────────────────────────────────────────────── */

.lv2-body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--v2-text);
  background: var(--v2-bg-glow), var(--v2-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

#lv2-net {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* soft vignette so the card area stays calm over the particle web */
.lv2-vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(640px 540px at 50% 46%,
              color-mix(in srgb, var(--v2-bg) 55%, transparent) 0%,
              transparent 70%);
}

.lv2-layout {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  padding: 2rem 1rem;
  box-sizing: border-box;
}

/* ── brand ────────────────────────────────────────────────── */

.lv2-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lv2-logo {
  width: 38px;
  height: 38px;
  color: var(--v2-accent);
}
.lv2-logo svg { width: 100%; height: 100%; }

.lv2-wordmark {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}
.lv2-wordmark em {
  font-style: normal;
  color: var(--v2-accent);
}

/* ── glass card ───────────────────────────────────────────── */

.lv2-card {
  width: min(400px, 100%);
  box-sizing: border-box;
  padding: 2.25rem 2rem 1.75rem;
  border-radius: 20px;
  background: var(--v2-card-bg);
  border: 1px solid var(--v2-card-border);
  box-shadow: var(--v2-card-shadow);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
}

.lv2-title {
  margin: 0 0 0.3rem;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.lv2-sub {
  margin: 0 0 1.4rem;
  font-size: 0.875rem;
  color: var(--v2-text-dim);
}

.lv2-hint {
  margin: 0 0 1.1rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--v2-text-dim);
}

/* ── alerts ───────────────────────────────────────────────── */

.lv2-alert {
  margin: 0 0 1.1rem;
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  font-size: 0.82rem;
  background: var(--v2-error-bg);
  border: 1px solid var(--v2-error-border);
  color: var(--v2-error-text);
}

/* ── buttons ──────────────────────────────────────────────── */

.lv2-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  padding: 0.8rem 1rem;
  border: none;
  border-radius: 12px;
  background: var(--v2-btn-grad);
  color: var(--v2-btn-text);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  box-shadow: 0 10px 26px -14px var(--v2-focus-ring);
}
.lv2-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -12px var(--v2-focus-ring);
}
.lv2-btn:active:not(:disabled) { transform: translateY(0); }
.lv2-btn:disabled { opacity: 0.65; cursor: wait; }
.lv2-btn:focus-visible {
  outline: 2px solid var(--v2-focus-ring);
  outline-offset: 2px;
}

.lv2-btn-icon { width: 20px; height: 20px; flex: none; }

.lv2-btn-ghost {
  background: transparent;
  color: var(--v2-accent);
  border: 1px solid var(--v2-input-border);
  box-shadow: none;
}
.lv2-btn-ghost:hover:not(:disabled) {
  border-color: var(--v2-accent);
  box-shadow: none;
}

/* ── recovery <details> ───────────────────────────────────── */

.lv2-recovery {
  margin: 1.1rem 0 0;
  border-top: 1px solid var(--v2-card-border);
  padding-top: 0.9rem;
}

.lv2-recovery summary {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--v2-text-dim);
  list-style: none;
  user-select: none;
}
.lv2-recovery summary::-webkit-details-marker { display: none; }
.lv2-recovery summary::before {
  content: '▸ ';
  color: var(--v2-text-faint);
}
.lv2-recovery[open] summary::before { content: '▾ '; }
.lv2-recovery summary:hover { color: var(--v2-text); }

.lv2-recovery form {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── inputs ───────────────────────────────────────────────── */

.lv2-field { display: block; }

.lv2-field-label {
  display: block;
  margin-bottom: 0.3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--v2-text-faint);
}

.lv2-field input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  border: 1px solid var(--v2-input-border);
  background: var(--v2-input-bg);
  color: var(--v2-text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.lv2-field input::placeholder { color: var(--v2-text-faint); }
.lv2-field input:focus {
  outline: none;
  border-color: var(--v2-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--v2-focus-ring) 55%, transparent);
}

.lv2-finehint {
  margin: 0;
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--v2-text-faint);
}

/* ── footer link / status ─────────────────────────────────── */

.lv2-footer-link {
  margin: 1.25rem 0 0;
  font-size: 0.82rem;
  text-align: center;
  color: var(--v2-text-dim);
}
.lv2-footer-link a {
  color: var(--v2-accent);
  text-decoration: none;
  font-weight: 600;
}
.lv2-footer-link a:hover { text-decoration: underline; }

.lv2-status {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--v2-text-faint);
}

.lv2-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--v2-ok);
  box-shadow: 0 0 8px var(--v2-ok);
}

.lv2-status-sep { opacity: 0.5; }

@media (prefers-reduced-motion: reduce) {
  .lv2-btn { transition: none; }
}