:root{--bg-void: #050505;--bg-deep: #0A0A0A;--bg-surface: #111111;--bg-elevated: #181818;--bg-input: #0D0D0D;--border-subtle: #1C1C1C;--border-medium: #2A2A2A;--border-strong: #3A3A3A;--text-white: #FFFFFF;--text-light: #E0E0E0;--text-muted: #8A8A8A;--text-dim: #555555;--accent-ember: #FF5733;--accent-ember-glow: rgba(255, 87, 51, .25);--accent-emerald: #10B981;--font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-serif: "Newsreader", Georgia, Cambria, serif;--font-mono: "JetBrains Mono", monospace;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--radius-pill: 9999px;--transition-fast: .16s cubic-bezier(.16, 1, .3, 1);--transition-smooth: .28s cubic-bezier(.16, 1, .3, 1)}*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background-color:var(--bg-void);color:var(--text-white);font-family:var(--font-sans);min-height:100vh;display:flex;flex-direction:column;line-height:1.5;overflow-x:hidden}.diag-container{width:100%;max-width:680px;margin:0 auto;padding:24px 20px 60px;min-height:100vh;display:flex;flex-direction:column;justify-content:center}.diag-nav{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--border-subtle)}.diag-brand{display:flex;align-items:center;gap:8px;font-size:.95rem;font-weight:800;letter-spacing:.08em;color:var(--text-white);text-decoration:none}.diag-brand-dot{width:6px;height:6px;background-color:var(--text-white);border-radius:1px}.diag-badge{font-family:var(--font-mono);font-size:.68rem;font-weight:600;letter-spacing:.08em;padding:3px 8px;border-radius:var(--radius-xs);background-color:var(--bg-elevated);border:1px solid var(--border-subtle);color:var(--text-muted);text-transform:uppercase}.font-serif{font-family:var(--font-serif)}.font-mono{font-family:var(--font-mono)}.diag-eyebrow{font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.12em;color:var(--text-muted);text-transform:uppercase;margin-bottom:8px;display:block}.diag-headline-hero{font-family:var(--font-serif);font-size:clamp(2.1rem,5.5vw,3.1rem);font-weight:500;line-height:1.14;letter-spacing:-.025em;color:var(--text-white);margin-bottom:18px}.diag-subhead{font-size:clamp(.96rem,2.2vw,1.1rem);color:var(--text-light);line-height:1.6;margin-bottom:32px}.diag-card{background-color:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:28px 24px;transition:all var(--transition-smooth)}.diag-option-btn{width:100%;text-align:left;background-color:var(--bg-deep);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px 18px;color:var(--text-white);cursor:pointer;display:flex;align-items:flex-start;gap:14px;transition:all var(--transition-fast);margin-bottom:10px}.diag-option-btn:hover{background-color:var(--bg-elevated);border-color:var(--border-medium);transform:translateY(-1px)}.diag-option-btn.selected{background-color:var(--bg-elevated);border-color:var(--text-white);box-shadow:0 0 0 1px var(--text-white)}.diag-option-key{font-family:var(--font-mono);font-size:.76rem;font-weight:700;padding:2px 6px;border-radius:var(--radius-xs);background-color:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-muted);flex-shrink:0;margin-top:2px}.diag-option-btn.selected .diag-option-key{background-color:var(--text-white);color:var(--bg-void);border-color:var(--text-white)}.diag-btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:16px 24px;background-color:var(--text-white);color:var(--bg-void);border:none;border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:.95rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;cursor:pointer;transition:all var(--transition-fast);text-decoration:none}.diag-btn-primary:hover{background-color:#e6e6e6;transform:translateY(-1px)}.diag-btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;background-color:transparent;color:var(--text-muted);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-family:var(--font-sans);font-size:.84rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;cursor:pointer;transition:all var(--transition-fast)}.diag-btn-secondary:hover{color:var(--text-white);border-color:var(--border-medium)}.diag-progress-bar-wrap{width:100%;height:3px;background-color:var(--border-subtle);border-radius:2px;margin-bottom:24px;overflow:hidden}.diag-progress-fill{height:100%;background-color:var(--text-white);transition:width .24s cubic-bezier(.16,1,.3,1)}.diag-input{width:100%;padding:14px 16px;background-color:var(--bg-input);border:1px solid var(--border-medium);border-radius:var(--radius-sm);color:var(--text-white);font-family:var(--font-sans);font-size:1rem;outline:none;transition:all var(--transition-fast)}.diag-input:focus{border-color:var(--text-white);background-color:var(--bg-elevated)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .28s cubic-bezier(.16,1,.3,1) forwards}@keyframes spinLoader{to{transform:rotate(360deg)}}.spinner{width:24px;height:24px;border:2px solid var(--border-subtle);border-top-color:var(--text-white);border-radius:50%;animation:spinLoader .7s linear infinite;display:inline-block}