/* ============================================================================
 * Auth v3 — Design-System v2  (Phase 5 / UX — Iteration 5)
 *
 * Geteiltes Page-CSS für login_v3.html + register_v3.html.
 * Split-Screen-Layout: Links Formular, rechts Brand-Visual-Panel.
 * Bricht < 980 px auf eine Spalte. Standalone (kein Base-Template).
 *
 * Token-Schicht: Light + Dark inline (keine Abhängigkeit von tokens.css).
 * Klassen-Prefix: .auth-*  .preview-*  .pw-*
 * ========================================================================= */

/* === TOKENS — Dark (default) ============================================== */

:root {
  --mgb-font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mgb-font-mono:   'JetBrains Mono', ui-monospace, monospace;

  --mgb-color-bg:             #0B1220;
  --mgb-color-bg-elevated:    #131C2E;
  --mgb-color-bg-subtle:      #1B273C;
  --mgb-color-bg-strong:      #243349;
  --mgb-color-border:         rgba(255, 255, 255, 0.08);
  --mgb-color-border-subtle:  rgba(255, 255, 255, 0.04);
  --mgb-color-border-strong:  rgba(255, 255, 255, 0.14);

  --mgb-color-text:           #F1F5F9;
  --mgb-color-text-muted:     #94A3B8;
  --mgb-color-text-subtle:    #64748B;

  --mgb-color-accent:         #F97316;
  --mgb-color-accent-hover:   #EA580C;
  --mgb-color-accent-soft:    rgba(249, 115, 22, 0.10);
  --mgb-color-accent-strong:  rgba(249, 115, 22, 0.18);

  --mgb-color-success:        #10B981;
  --mgb-color-success-soft:   rgba(16, 185, 129, 0.10);

  --mgb-color-danger:         #EF4444;
  --mgb-color-danger-soft:    rgba(239, 68, 68, 0.10);
  --mgb-color-warning:        #F59E0B;

  --mgb-shadow-card:
    0 1px 0 rgba(255, 255, 255, 0.03) inset,
    0 1px 2px rgba(0, 0, 0, 0.20),
    0 4px 12px rgba(0, 0, 0, 0.18);
  --mgb-shadow-accent:
    0 1px 0 rgba(255, 255, 255, 0.20) inset,
    0 4px 12px rgba(234, 88, 12, 0.40);
}

/* === TOKENS — Light ======================================================= */

[data-theme="light"] {
  --mgb-color-bg:             #F8FAFC;
  --mgb-color-bg-elevated:    #FFFFFF;
  --mgb-color-bg-subtle:      #F1F5F9;
  --mgb-color-bg-strong:      #E2E8F0;
  --mgb-color-border:         #E2E8F0;
  --mgb-color-border-subtle:  #F1F5F9;
  --mgb-color-border-strong:  #CBD5E1;
  --mgb-color-text:           #0F172A;
  --mgb-color-text-muted:     #475569;
  --mgb-color-text-subtle:    #94A3B8;
  --mgb-color-accent-soft:    rgba(249, 115, 22, 0.08);
  --mgb-color-accent-strong:  rgba(249, 115, 22, 0.14);
  --mgb-shadow-card:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 4px 12px rgba(15, 23, 42, 0.06);
}

/* === BASE ================================================================= */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--mgb-font-family);
  background: var(--mgb-color-bg);
  color: var(--mgb-color-text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { border: none; background: none; font-family: inherit; cursor: pointer; }
img, svg { display: block; }

/* === SPLIT-SCREEN LAYOUT ================================================== */

.auth {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 980px) {
  .auth { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
}

/* === FORM SIDE ============================================================ */

.auth-form-side {
  display: flex;
  flex-direction: column;
  padding: 32px 48px;
  min-height: 100vh;
  background: var(--mgb-color-bg);
}

@media (max-width: 560px) { .auth-form-side { padding: 24px 20px; } }

/* Top bar */
.auth-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 64px;
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mgb-color-text);
}
.auth-logo .mark { width: 32px; height: 32px; }
.auth-logo img.mark { width: 32px; height: 32px; }
.auth-logo .bot { font-weight: 500; opacity: 0.65; }

.auth-top-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.auth-top-link { font-size: 13px; color: var(--mgb-color-text-muted); }
.auth-top-link a {
  color: var(--mgb-color-accent);
  font-weight: 600;
}
.auth-top-link a:hover { text-decoration: underline; }

/* Theme toggle */
.auth-theme-toggle {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: var(--mgb-color-bg-subtle);
  border: 1px solid var(--mgb-color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mgb-color-text-muted);
  transition: border-color 0.15s, color 0.15s;
}
.auth-theme-toggle:hover { border-color: var(--mgb-color-accent); color: var(--mgb-color-accent); }

.sun-icon  { display: block; }
.moon-icon { display: none;  }
[data-theme="dark"] .sun-icon  { display: none;  }
[data-theme="dark"] .moon-icon { display: block; }

/* Form wrap */
.auth-form-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 440px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 0;
}

/* Tab switcher */
.auth-form-tabs {
  display: inline-flex;
  align-self: flex-start;
  background: var(--mgb-color-bg-elevated);
  border: 1px solid var(--mgb-color-border);
  border-radius: 9999px;
  padding: 4px;
  margin-bottom: 24px;
  gap: 0;
}

.auth-tab {
  padding: 8px 20px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--mgb-color-text-muted);
  transition: all 120ms;
  white-space: nowrap;
}
.auth-tab:hover { color: var(--mgb-color-text); }
.auth-tab.active {
  background: var(--mgb-color-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(234, 88, 12, 0.30);
}

/* Headings */
.auth-form-wrap h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.018em;
  line-height: 1.15;
  margin: 0 0 8px;
}
.auth-form-wrap .subtitle {
  color: var(--mgb-color-text-muted);
  font-size: 13px;
  margin: 0 0 24px;
}

/* Error box */
.auth-error {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--mgb-color-danger-soft);
  border: 1px solid var(--mgb-color-danger);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 20px;
  color: var(--mgb-color-danger);
  font-size: 13px;
}
.auth-error svg { width: 16px; height: 16px; flex-shrink: 0; }

/* Social buttons */
.auth-social {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 4px;
}

/*
 * Two-column layout — activate when Apple OAuth is live.
 * Remove the HTML comment wrapper around the Apple button,
 * and the grid automatically switches to 1fr 1fr.
 */
.auth-social--has-apple:has(.auth-social-btn + .auth-social-btn) {
  grid-template-columns: 1fr 1fr;
}

.auth-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 16px;
  background: var(--mgb-color-bg-elevated);
  border: 1px solid var(--mgb-color-border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--mgb-color-text);
  cursor: pointer;
  transition: background 120ms, border-color 120ms;
}
.auth-social-btn:hover {
  background: var(--mgb-color-bg-subtle);
  border-color: var(--mgb-color-border-strong);
}
.auth-social-btn svg { width: 18px; height: 18px; }

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--mgb-color-text-subtle);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--mgb-color-border);
}

/* Form fields */
.auth-field { margin-bottom: 16px; }

.auth-field-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--mgb-color-text);
  margin-bottom: 7px;
}
.auth-field-label a {
  color: var(--mgb-color-accent);
  font-size: 12px;
  font-weight: 600;
}
.auth-field-label a:hover { text-decoration: underline; }

.auth-input-wrap { position: relative; }

.auth-input-wrap svg.leading {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--mgb-color-text-subtle);
  pointer-events: none;
}

.auth-input-wrap input {
  width: 100%;
  height: 44px;
  padding: 0 16px 0 38px;
  background: var(--mgb-color-bg-elevated);
  border: 1px solid var(--mgb-color-border);
  border-radius: 8px;
  color: var(--mgb-color-text);
  font-size: 13px;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.auth-input-wrap input:focus {
  outline: none;
  border-color: var(--mgb-color-accent);
  box-shadow: 0 0 0 3px var(--mgb-color-accent-soft);
}
.auth-input-wrap input::placeholder { color: var(--mgb-color-text-subtle); }

/* Input with trailing toggle — prevent text clipping */
.auth-input-wrap input[type="password"],
.auth-input-wrap input[type="text"] {
  padding-right: 42px;
}

/* Trailing icon/button */
.auth-input-wrap .trailing {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mgb-color-text-subtle);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.auth-input-wrap .trailing:hover {
  background: var(--mgb-color-bg-subtle);
  color: var(--mgb-color-text);
}
.auth-input-wrap .trailing svg { width: 16px; height: 16px; }

/* Password strength meter */
.pw-strength {
  display: flex;
  gap: 4px;
  margin-top: 8px;
}
.pw-strength .seg {
  flex: 1;
  height: 4px;
  border-radius: 9999px;
  background: var(--mgb-color-bg-subtle);
  transition: background 0.2s;
}
.pw-strength .seg.ok   { background: var(--mgb-color-success); }
.pw-strength .seg.warn { background: var(--mgb-color-warning); }

.pw-strength-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 6px;
  font-size: 12px;
  color: var(--mgb-color-text-muted);
}
.pw-strength-label .level {
  font-weight: 600;
}

/* Consent checkboxes */
.auth-consents {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 18px 0;
}

.auth-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--mgb-color-text-muted);
  line-height: 1.5;
  cursor: pointer;
}
.auth-check input {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--mgb-color-accent);
}
.auth-check a {
  color: var(--mgb-color-accent);
  text-decoration: underline;
}

/* Primary submit button */
.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 48px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: filter 0.12s, transform 0.12s;
}
.auth-btn svg { width: 16px; height: 16px; }

.auth-btn-primary {
  background: linear-gradient(180deg, var(--mgb-color-accent), var(--mgb-color-accent-hover));
  color: #fff;
  border: none;
  box-shadow: var(--mgb-shadow-accent);
}
.auth-btn-primary:hover  { filter: brightness(1.08); transform: translateY(-1px); }
.auth-btn-primary:active { transform: translateY(0); }

/* Foot link */
.auth-foot {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--mgb-color-text-muted);
}
.auth-foot a { color: var(--mgb-color-accent); font-weight: 600; }
.auth-foot a:hover { text-decoration: underline; }

/* Trust badges */
.auth-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--mgb-color-border-subtle);
}
.auth-trust .item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--mgb-color-text-muted);
}
.auth-trust .item svg {
  width: 14px;
  height: 14px;
  color: var(--mgb-color-success);
}

/* === VISUAL SIDE ========================================================== */

.auth-visual {
  position: relative;
  overflow: hidden;
  padding: 64px 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-left: 1px solid var(--mgb-color-border);
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(249, 115, 22, 0.20), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(249, 115, 22, 0.10), transparent),
    linear-gradient(180deg, var(--mgb-color-bg-elevated), var(--mgb-color-bg));
}
.auth-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 80%);
  mask-image: radial-gradient(ellipse at 50% 30%, black 30%, transparent 80%);
  pointer-events: none;
}
.auth-visual > * { position: relative; z-index: 1; }

/* Quote block */
.auth-quote { max-width: 480px; margin-bottom: 24px; }

.auth-quote-tag {
  display: inline-block;
  font-family: var(--mgb-font-mono);
  font-size: 11px;
  color: var(--mgb-color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding: 4px 10px;
  background: var(--mgb-color-accent-soft);
  border: 1px solid var(--mgb-color-accent-strong);
  border-radius: 6px;
}

.auth-quote h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.2;
  margin: 0 0 12px;
}
.auth-quote p {
  color: var(--mgb-color-text-muted);
  font-size: 17px;
  line-height: 1.6;
}

/* Preview card */
.preview-card {
  background: var(--mgb-color-bg-elevated);
  border: 1px solid var(--mgb-color-border);
  border-radius: 12px;
  padding: 22px;
  box-shadow: var(--mgb-shadow-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.preview-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.preview-card-head .pair {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
}

.preview-card-head .coin {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(247, 147, 26, 0.18);
  color: #F7931A;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 9px;
}

/* Live badge */
.preview-live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--mgb-color-success-soft);
  color: var(--mgb-color-success);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.preview-live .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* Pulse animation */
.pulse {
  animation: auth-pulse 2s ease-in-out infinite;
}
@keyframes auth-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

.preview-card-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}
.preview-card-row .label {
  font-size: 12px;
  color: var(--mgb-color-text-muted);
}
.preview-card-row .val {
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.005em;
}
.preview-card-row .val.lg {
  font-size: 32px;
  letter-spacing: -0.018em;
}
.preview-card-row .val.success { color: var(--mgb-color-success); }

.preview-card-spark {
  height: 60px;
  margin-top: 12px;
}
.preview-card-spark svg { width: 100%; height: 100%; }

/* Stat grid inside card */
.preview-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--mgb-color-border-subtle);
}
.preview-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.preview-stats .stat .num {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.012em;
  color: var(--mgb-color-accent);
}
.preview-stats .stat .lbl {
  font-size: 12px;
  color: var(--mgb-color-text-muted);
}

/* Social proof / testimonial strip */
.auth-social-proof {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.auth-avatars { display: flex; }
.auth-avatars span {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  border: 2px solid var(--mgb-color-bg-elevated);
  flex-shrink: 0;
}
.auth-avatars span + span { margin-left: -10px; }

.auth-social-proof .text-strong { font-size: 13px; font-weight: 600; }
.auth-social-proof .text-muted  { font-size: 12px; color: var(--mgb-color-text-muted); }

/* === LEGAL FOOTER ========================================================= */

.mgb-legal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--mgb-color-border);
  color: var(--mgb-color-text-muted);
  font-size: 12px;
  text-align: center;
}
.mgb-legal-footer a { color: inherit; }
.mgb-legal-footer a:hover { color: var(--mgb-color-accent); }