/* ============================================================
   Tierphysio Manager 3.0 — Installer Stylesheet
   Futuristic Liquid Glass — sci-fi HUD × Apple Vision Pro
   ============================================================ */

:root {
  --bg-base:        #04040e;
  --bg-surface:     #07071a;
  --glass-bg:       rgba(255,255,255,0.035);
  --glass-bg-hover: rgba(255,255,255,0.065);
  --glass-border:   rgba(255,255,255,0.07);
  --glass-border-hi:rgba(255,255,255,0.16);
  --text-primary:   #eef0ff;
  --text-secondary: #8890b8;
  --text-muted:     #454570;
  --accent:         #4f7cff;
  --accent-light:   #7aa3ff;
  --accent-glow:    rgba(79,124,255,0.4);
  --accent-2:       #a855f7;
  --accent-3:       #06b6d4;
  --success:        #22c55e;
  --success-bg:     rgba(34,197,94,0.08);
  --success-border: rgba(34,197,94,0.2);
  --warning:        #f59e0b;
  --warning-bg:     rgba(245,158,11,0.08);
  --warning-border: rgba(245,158,11,0.2);
  --danger:         #ef4444;
  --danger-bg:      rgba(239,68,68,0.08);
  --danger-border:  rgba(239,68,68,0.2);
  --sidebar-w:      300px;
  --radius:         16px;
  --radius-sm:      10px;
  --radius-xs:      6px;
  --transition:     all 0.22s cubic-bezier(0.4,0,0.2,1);
}

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

html { font-size: 16px; }

.inst-body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ══════════════════════════════════════
   FUTURISTIC BACKGROUND SYSTEM
   ══════════════════════════════════════ */

/* Deep space base */
.inst-bg {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* Animated nebula orbs */
.inst-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 600px at 10% 10%,  rgba(79,124,255,0.13) 0%, transparent 60%),
    radial-gradient(ellipse 600px 500px at 90% 80%,  rgba(168,85,247,0.10) 0%, transparent 60%),
    radial-gradient(ellipse 400px 400px at 50% 50%,  rgba(6,182,212,0.06)  0%, transparent 60%);
  animation: nebula-drift 20s ease-in-out infinite alternate;
}

.inst-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 15% 25%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 38% 60%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 15%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 78% 40%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 70%, rgba(255,255,255,0.45) 0%, transparent 100%),
    radial-gradient(1px 1px at 25% 80%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 90%, rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 55%, rgba(255,255,255,0.25) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 35%, rgba(120,180,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 82% 20%, rgba(180,120,255,0.5) 0%, transparent 100%);
  animation: stars-twinkle 6s ease-in-out infinite alternate;
}

@keyframes nebula-drift {
  0%   { transform: translate(0,0) scale(1); }
  50%  { transform: translate(20px, -15px) scale(1.04); }
  100% { transform: translate(-10px, 10px) scale(0.97); }
}

@keyframes stars-twinkle {
  0%,100% { opacity: 1; }
  50%     { opacity: 0.6; }
}

/* Scan-line grid overlay */
.inst-grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.025;
  background-image:
    linear-gradient(rgba(79,124,255,0.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,124,255,0.8) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ── Layout ── */
.inst-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 100vh;
}

/* ══════════════════════════════════════
   SIDEBAR — Futuristic HUD Panel
   ══════════════════════════════════════ */
.inst-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: rgba(6,8,28,0.6);
  border-right: 1px solid rgba(79,124,255,0.15);
  backdrop-filter: blur(40px) saturate(1.4);
  -webkit-backdrop-filter: blur(40px) saturate(1.4);
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.75rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  box-shadow: inset -1px 0 0 rgba(79,124,255,0.08), 4px 0 40px rgba(0,0,0,0.4);
}

/* Subtle left edge glow */
.inst-sidebar::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 2px;
  background: linear-gradient(180deg, transparent, rgba(79,124,255,0.6), rgba(168,85,247,0.4), transparent);
  border-radius: 0 2px 2px 0;
}

/* ── Brand ── */
.inst-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  position: relative;
}

.inst-brand-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(79,124,255,0.2), rgba(168,85,247,0.15));
  border: 1px solid rgba(79,124,255,0.35);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  box-shadow:
    0 0 24px rgba(79,124,255,0.25),
    inset 0 1px 0 rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
}

/* Holographic shimmer on icon */
@keyframes icon-shimmer {
  0%,100% { box-shadow: 0 0 24px rgba(79,124,255,0.25), inset 0 1px 0 rgba(255,255,255,0.1); }
  50%     { box-shadow: 0 0 36px rgba(168,85,247,0.35), inset 0 1px 0 rgba(255,255,255,0.2); }
}
.inst-brand-icon { animation: icon-shimmer 4s ease-in-out infinite; }

.inst-brand-name {
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.inst-brand-version {
  font-size: 0.68rem;
  color: var(--accent-light);
  margin-top: 0.15rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Step nav — HUD list ── */
.inst-steps-nav {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
}

.inst-step-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}

/* Active item — glowing highlight */
.inst-step-item.active {
  background: linear-gradient(135deg, rgba(79,124,255,0.12), rgba(168,85,247,0.06));
  border-color: rgba(79,124,255,0.25);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 0 20px rgba(79,124,255,0.08);
}

/* Active item left accent bar */
.inst-step-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 2.5px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 8px var(--accent-glow);
}

.inst-step-item.done .inst-step-bullet {
  background: linear-gradient(135deg, var(--success), #15803d);
  border-color: transparent;
  color: white;
  box-shadow: 0 0 12px rgba(34,197,94,0.3);
}

.inst-step-item.done .inst-step-label {
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: rgba(100,100,140,0.4);
}

.inst-step-bullet {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition);
  font-variant-numeric: tabular-nums;
}

.inst-step-item.active .inst-step-bullet {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: white;
  box-shadow: 0 0 18px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.2);
}

.inst-step-label {
  font-size: 0.845rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  letter-spacing: 0.005em;
}

.inst-step-item.active .inst-step-label {
  color: var(--text-primary);
  font-weight: 600;
}

/* ══════════════════════════════════════
   MAIN CONTENT — Glass Panel
   ══════════════════════════════════════ */
.inst-main {
  flex: 1;
  padding: 3rem 3.5rem;
  max-width: 800px;
  display: flex;
  flex-direction: column;
}

/* Step header */
.inst-step-header {
  margin-bottom: 2.25rem;
  position: relative;
}

/* Decorative top accent line */
.inst-step-header::before {
  content: '';
  display: block;
  width: 3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
  margin-bottom: 1rem;
  box-shadow: 0 0 12px var(--accent-glow);
}

.inst-step-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
  /* Subtle gradient text */
  background: linear-gradient(135deg, #ffffff 0%, rgba(180,200,255,0.9) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.inst-step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Section title — glowing underline */
.inst-section-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(79,124,255,0.12);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.inst-section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
}

/* ══════════════════════════════════════
   REQUIREMENTS LIST — Futuristic
   ══════════════════════════════════════ */
.inst-req-list {
  background: rgba(6,8,28,0.5);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.05);
}

.inst-req-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: background 0.18s;
  position: relative;
}

.inst-req-item:last-child { border-bottom: none; }
.inst-req-item:hover { background: rgba(79,124,255,0.04); }

.inst-req-fix {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.45rem 1.25rem 0.55rem 3.5rem;
  font-size: 0.76rem;
  color: #fbbf24;
  background: rgba(245,158,11,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  line-height: 1.55;
}

.inst-req-left {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.inst-req-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inst-req-ok {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  color: var(--success);
  box-shadow: 0 0 8px rgba(34,197,94,0.15);
}

.inst-req-fail {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  color: var(--danger);
}

.inst-req-name {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 500;
}

.inst-req-status {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: 9999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.inst-req-status-ok {
  background: rgba(34,197,94,0.1);
  color: #4ade80;
  border: 1px solid rgba(34,197,94,0.2);
}

.inst-req-status-fail {
  background: rgba(239,68,68,0.1);
  color: #f87171;
  border: 1px solid rgba(239,68,68,0.2);
}

/* ══════════════════════════════════════
   FORM ELEMENTS — Futuristic Glass
   ══════════════════════════════════════ */
.inst-field {
  margin-bottom: 1.35rem;
}

.inst-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.inst-label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.inst-hint {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0;
}

.inst-hint code {
  background: rgba(79,124,255,0.1);
  color: var(--accent-light);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.72rem;
}

.inst-input {
  width: 100%;
  background: rgba(6,8,28,0.6);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
  color: var(--text-primary);
  font-family: inherit;
  transition: var(--transition);
  outline: none;
  appearance: none;
  backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.inst-input:hover {
  border-color: rgba(79,124,255,0.25);
  background: rgba(8,10,32,0.7);
}

.inst-input:focus {
  border-color: rgba(79,124,255,0.55);
  background: rgba(79,124,255,0.04);
  box-shadow:
    0 0 0 3px rgba(79,124,255,0.1),
    inset 0 1px 0 rgba(255,255,255,0.04),
    0 0 20px rgba(79,124,255,0.08);
}

.inst-input::placeholder { color: var(--text-muted); }

.inst-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235a5a8a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

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

.inst-input-pw {
  padding-right: 2.75rem;
}

.inst-pw-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  transition: color 0.15s;
}

.inst-pw-toggle:hover { color: var(--accent-light); }

/* Password strength */
.inst-strength-bar {
  height: 2px;
  background: rgba(255,255,255,0.05);
  border-radius: 9999px;
  overflow: hidden;
  margin-top: 0.5rem;
  display: none;
}

.inst-strength-bar.visible { display: block; }

.inst-strength-fill {
  height: 100%;
  border-radius: 9999px;
  transition: width 0.3s, background 0.3s;
}

.inst-strength-label {
  font-size: 0.7rem;
  font-weight: 600;
  margin-top: 0.3rem;
  min-height: 1em;
}

/* Password match */
.inst-pw-match {
  font-size: 0.7rem;
  font-weight: 600;
  margin-top: 0.4rem;
  min-height: 1em;
}

/* DB test bar */
.inst-db-test-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 0.875rem 1.1rem;
  background: rgba(6,8,28,0.5);
  border: 1px solid rgba(79,124,255,0.15);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(12px);
}

.inst-db-result {
  font-size: 0.82rem;
  font-weight: 600;
}

.inst-db-result.ok    { color: #4ade80; }
.inst-db-result.fail  { color: #f87171; }

/* ══════════════════════════════════════
   ALERTS — Futuristic
   ══════════════════════════════════════ */
.inst-alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.855rem;
  line-height: 1.55;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.inst-alert-error {
  background: rgba(239,68,68,0.07);
  border: 1px solid rgba(239,68,68,0.2);
  color: #fca5a5;
  box-shadow: 0 0 20px rgba(239,68,68,0.06), inset 0 1px 0 rgba(255,255,255,0.03);
}

.inst-alert-success {
  background: rgba(34,197,94,0.07);
  border: 1px solid rgba(34,197,94,0.2);
  color: #86efac;
  box-shadow: 0 0 20px rgba(34,197,94,0.06), inset 0 1px 0 rgba(255,255,255,0.03);
}

.inst-alert-warning {
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.2);
  color: #fde68a;
  box-shadow: 0 0 20px rgba(245,158,11,0.06), inset 0 1px 0 rgba(255,255,255,0.03);
}

/* ══════════════════════════════════════
   BUTTONS — Futuristic Glass
   ══════════════════════════════════════ */
.inst-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.inst-actions .inst-btn-primary { margin-left: auto; }

.inst-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.68rem 1.35rem;
  border-radius: var(--radius-sm);
  font-size: 0.855rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.inst-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.07) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.inst-btn:hover::before { opacity: 1; }

.inst-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary — glowing capsule */
.inst-btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #3557d4 100%);
  color: #fff;
  box-shadow:
    0 4px 20px rgba(79,124,255,0.4),
    inset 0 1px 0 rgba(255,255,255,0.18);
  border: 1px solid rgba(79,124,255,0.5);
}

.inst-btn-primary:hover {
  box-shadow:
    0 6px 30px rgba(79,124,255,0.55),
    inset 0 1px 0 rgba(255,255,255,0.2);
  transform: translateY(-1px);
}

.inst-btn-primary:active { transform: translateY(0); }

/* Ghost — liquid glass */
.inst-btn-ghost {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
}

.inst-btn-ghost:hover {
  background: rgba(79,124,255,0.08);
  border-color: rgba(79,124,255,0.25);
  color: var(--text-primary);
}

.inst-btn-sm {
  padding: 0.42rem 0.9rem;
  font-size: 0.78rem;
}

.inst-btn-lg {
  padding: 0.875rem 1.85rem;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

/* ══════════════════════════════════════
   SUCCESS PAGE — Futuristic
   ══════════════════════════════════════ */
.inst-success {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.5rem 0;
}

@keyframes success-pulse {
  0%,100% { box-shadow: 0 0 40px rgba(34,197,94,0.25), 0 0 80px rgba(34,197,94,0.08); }
  50%     { box-shadow: 0 0 60px rgba(34,197,94,0.4),  0 0 120px rgba(34,197,94,0.15); }
}

@keyframes success-check {
  0%   { stroke-dashoffset: 30; opacity: 0; }
  60%  { opacity: 1; }
  100% { stroke-dashoffset: 0; opacity: 1; }
}

.inst-success-icon {
  width: 88px;
  height: 88px;
  background: radial-gradient(circle, rgba(34,197,94,0.12) 0%, rgba(34,197,94,0.04) 100%);
  border: 1.5px solid rgba(34,197,94,0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  animation: success-pulse 2.5s ease-in-out infinite;
  backdrop-filter: blur(12px);
  position: relative;
}

/* Orbit ring */
.inst-success-icon::after {
  content: '';
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 1px solid rgba(34,197,94,0.15);
  animation: success-pulse 2.5s ease-in-out infinite reverse;
}

.inst-success-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, #4ade80 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.inst-success-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 2rem;
  max-width: 520px;
}

.inst-success-checklist {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
  width: 100%;
}

.inst-check-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.86rem;
  color: var(--text-secondary);
  padding: 0.65rem 1rem;
  background: rgba(34,197,94,0.05);
  border: 1px solid rgba(34,197,94,0.1);
  border-radius: var(--radius-xs);
  backdrop-filter: blur(8px);
}

.inst-success-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1.1rem;
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.18);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: #fde68a;
  line-height: 1.55;
  width: 100%;
  backdrop-filter: blur(8px);
}

.inst-success-note code {
  background: rgba(245,158,11,0.12);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.78rem;
}

/* Code elements globally */
code {
  background: rgba(79,124,255,0.1);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.82em;
  color: var(--accent-light);
  border: 1px solid rgba(79,124,255,0.15);
}

/* ══════════════════════════════════════
   FORM CARD — glass panel wrapper
   ══════════════════════════════════════ */
.inst-form-card {
  background: rgba(6,8,28,0.45);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(20px);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.25),
    inset 0 1px 0 rgba(255,255,255,0.04);
  position: relative;
  overflow: hidden;
}

/* Prismatic top-edge highlight */
.inst-form-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(79,124,255,0.4),
    rgba(168,85,247,0.3),
    transparent
  );
}

/* ── Step counter chip in header ── */
.inst-step-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  background: rgba(79,124,255,0.1);
  border: 1px solid rgba(79,124,255,0.2);
  border-radius: 9999px;
  padding: 0.2rem 0.65rem;
  margin-bottom: 0.75rem;
}

.inst-step-chip::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
  animation: chip-pulse 2s ease-in-out infinite;
}

@keyframes chip-pulse {
  0%,100% { opacity: 1; box-shadow: 0 0 6px var(--accent-glow); }
  50%     { opacity: 0.5; box-shadow: 0 0 2px var(--accent-glow); }
}

/* ── Scrollbar ── */
.inst-sidebar::-webkit-scrollbar { width: 3px; }
.inst-sidebar::-webkit-scrollbar-track { background: transparent; }
.inst-sidebar::-webkit-scrollbar-thumb {
  background: rgba(79,124,255,0.3);
  border-radius: 9999px;
}

.inst-main::-webkit-scrollbar { width: 4px; }
.inst-main::-webkit-scrollbar-track { background: transparent; }
.inst-main::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: 9999px;
}

/* ── Separator ── */
.inst-sep {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
  margin: 1.5rem 0;
}

/* ══════════════════════════════════════
   LOADING SPINNER (button state)
   ══════════════════════════════════════ */
@keyframes inst-spin {
  to { transform: rotate(360deg); }
}

.inst-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.25);
  border-top-color: white;
  border-radius: 50%;
  animation: inst-spin 0.7s linear infinite;
  flex-shrink: 0;
}

/* ══════════════════════════════════════
   INSTALLATION PROGRESS SCENE
   Windows-style bar + running dog
   ══════════════════════════════════════ */

/* The whole scene sits in the sidebar footer */
.inst-install-scene {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(79,124,255,0.1);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

/* ── Running track ── */
.inst-run-track {
  position: relative;
  height: 50px;
  overflow: hidden;
  border-radius: var(--radius-xs);
  background: rgba(4,4,18,0.7);
  border: 1px solid rgba(79,124,255,0.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

/* Scrolling speed-line background */
@keyframes track-scroll {
  from { background-position: 0 0; }
  to   { background-position: -80px 0; }
}

.inst-run-track::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(79,124,255,0.03) 0px,
    rgba(79,124,255,0.03) 1px,
    transparent 1px,
    transparent 20px
  );
  animation: track-scroll 1.2s linear infinite;
}

/* Dashed ground line */
.inst-run-track::after {
  content: '';
  position: absolute;
  bottom: 11px;
  left: 0;
  right: 0;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    rgba(79,124,255,0.25) 0px,
    rgba(79,124,255,0.25) 6px,
    transparent 6px,
    transparent 14px
  );
  z-index: 1;
}

/* ── Dog SVG silhouette running across ── */
@keyframes dog-run {
  0%   { left: -60px; }
  100% { left: calc(100% + 10px); }
}

/* Dog body leg cycles */
@keyframes dog-leg-fl { 0%,100%{transform:rotate(-30deg)} 50%{transform:rotate(30deg)} }
@keyframes dog-leg-rl { 0%,100%{transform:rotate(30deg)}  50%{transform:rotate(-30deg)} }
@keyframes dog-tail   { 0%,100%{transform:rotate(20deg)}  50%{transform:rotate(-15deg)} }
@keyframes dog-ear    { 0%,100%{transform:rotate(-5deg)}  50%{transform:rotate(12deg)} }
@keyframes dog-bounce { 0%,100%{transform:translateY(0)} 25%,75%{transform:translateY(-3px)} 50%{transform:translateY(-1px)} }

.inst-dog {
  position: absolute;
  bottom: 13px;
  width: 52px;
  height: 32px;
  animation: dog-run 2.8s linear infinite, dog-bounce 0.35s ease-in-out infinite;
}

.inst-dog svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* ── HUD Progress bar ── */
.inst-win-bar-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.inst-win-bar-label {
  font-size: 0.67rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.inst-win-bar-label span:last-child {
  color: var(--accent-light);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
}

.inst-win-bar {
  height: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(79,124,255,0.12);
  border-radius: 9999px;
  overflow: hidden;
  position: relative;
}

/* shimmer sweep */
@keyframes win-shimmer {
  0%   { left: -50%; }
  100% { left: 130%; }
}

.inst-win-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  border-radius: 9999px;
  position: relative;
  overflow: hidden;
  transition: width 0.6s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Shimmer sweep */
.inst-win-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  animation: win-shimmer 1.8s ease-in-out infinite;
}

/* ── Status text ── */
.inst-status-text {
  font-size: 0.65rem;
  color: var(--text-muted);
  min-height: 1em;
  text-align: center;
  font-style: italic;
  letter-spacing: 0.03em;
  transition: opacity 0.4s ease;
}

/* ── Paw prints trail ── */
@keyframes paw-appear {
  0%   { opacity: 0; transform: scale(0.5) rotate(-10deg); }
  20%  { opacity: 0.6; transform: scale(1) rotate(0deg); }
  80%  { opacity: 0.4; }
  100% { opacity: 0; }
}

.inst-paw {
  position: absolute;
  bottom: 14px;
  font-size: 10px;
  opacity: 0;
  animation: paw-appear 1.4s ease-out forwards;
  user-select: none;
  pointer-events: none;
}
.inst-paw:nth-child(1) { left: 12%;  animation-delay: 0.3s; }
.inst-paw:nth-child(2) { left: 25%;  animation-delay: 0.7s;  transform: rotate(10deg); }
.inst-paw:nth-child(3) { left: 38%;  animation-delay: 1.1s; }
.inst-paw:nth-child(4) { left: 52%;  animation-delay: 1.5s;  transform: rotate(-8deg); }
.inst-paw:nth-child(5) { left: 65%;  animation-delay: 1.9s; }
.inst-paw:nth-child(6) { left: 78%;  animation-delay: 2.3s;  transform: rotate(6deg); }

/* ── Step 4: complete state — bar turns green, dog sits ── */
.inst-install-scene.complete .inst-win-bar-fill {
  background: linear-gradient(90deg, #16a34a 0%, #22c55e 50%, #16a34a 100%);
  box-shadow: 0 0 12px rgba(34,197,94,0.4);
}

.inst-install-scene.complete .inst-win-bar-label span:last-child {
  color: #4ade80;
}

.inst-install-scene.complete .inst-run-track {
  border-color: rgba(34,197,94,0.25);
  background: rgba(34,197,94,0.04);
}

/* Dog "sitting" — stop run animation, stay in center */
.inst-install-scene.complete .inst-dog {
  animation: none;
  left: 50%;
  transform: translateX(-50%);
}

/* Persistent paw prints on success */
.inst-install-scene.complete .inst-paw {
  animation: none;
  opacity: 0.5;
}

/* Bounce celebration on success */
@keyframes dog-celebrate {
  0%,100% { transform: translateX(-50%) translateY(0) scaleX(1); }
  25%      { transform: translateX(-50%) translateY(-6px) scaleX(1.05); }
  50%      { transform: translateX(-50%) translateY(0) scaleX(0.97); }
  75%      { transform: translateX(-50%) translateY(-3px) scaleX(1.02); }
}

.inst-install-scene.complete .inst-dog {
  animation: dog-celebrate 0.8s ease 0.3s 3 forwards;
  left: 50%;
}

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */
@media (max-width: 960px) {
  :root { --sidebar-w: 240px; }
  .inst-sidebar { padding: 2rem 1.5rem; }
  .inst-main    { padding: 2.5rem 2rem; }
}

@media (max-width: 700px) {
  .inst-wrap    { flex-direction: column; }

  .inst-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.25rem 1.25rem 1rem;
    border-right: none;
    border-bottom: 1px solid rgba(79,124,255,0.1);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  }

  .inst-sidebar::before { display: none; }
  .inst-brand   { margin-bottom: 0; flex: 0 0 auto; }
  .inst-steps-nav { flex-direction: row; flex-wrap: wrap; gap: 0.25rem; flex: 1; }
  .inst-step-item { padding: 0.4rem 0.6rem; border: none !important; background: none !important; }
  .inst-step-item::before { display: none; }
  .inst-step-label { font-size: 0.75rem; }
  .inst-install-scene { display: none; }

  .inst-main    { padding: 1.5rem 1.25rem; }
  .inst-grid-2  { grid-template-columns: 1fr; }
  .inst-actions { flex-direction: column-reverse; }
  .inst-actions .inst-btn { width: 100%; justify-content: center; margin-left: 0; }
}