*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#8B5CF6;--primary-light:#A78BFA;--accent:#EC4899;--bg:#0B0A14;--bg-card:rgba(16,14,28,0.75);--border:rgba(139,92,246,0.15);--border-hover:rgba(139,92,246,0.3);--text:#E8E4F8;--text-muted:#A09BB8;--text-dim:#6B6580;--radius:12px;--radius-sm:8px;--transition:250ms ease;--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
html{font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6}
body::before{content:'';position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse 50% 40% at 25% 10%,rgba(139,92,246,0.06),transparent 70%),radial-gradient(ellipse 40% 50% at 80% 90%,rgba(236,72,153,0.04),transparent 70%)}
.app{position:relative;z-index:1;max-width:700px;margin:0 auto;padding:0 20px}
.hidden{display:none!important}

.header{padding:32px 0 16px;text-align:center}
.logo{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:6px}
.logo h1{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{color:var(--text-muted);font-size:0.9rem}

.main{display:flex;flex-direction:column;gap:20px;padding-bottom:40px}
section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;backdrop-filter:blur(12px);transition:border-color var(--transition)}
section:hover{border-color:var(--border-hover)}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.section-header h2{font-size:1rem;font-weight:600}

textarea{width:100%;resize:vertical;background:rgba(0,0,0,0.3);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 14px;font-family:'SF Mono','Fira Code',monospace;font-size:0.85rem;color:var(--text);transition:border-color var(--transition);line-height:1.5}
textarea:focus{outline:none;border-color:var(--primary)}
textarea::placeholder{color:var(--text-dim)}

.input-actions{display:flex;gap:8px;margin-top:10px}

.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:0.7rem;font-weight:700;letter-spacing:0.5px;text-transform:uppercase}
.badge-header{background:rgba(139,92,246,0.15);color:var(--primary-light)}
.badge-payload{background:rgba(236,72,153,0.15);color:var(--accent)}
.badge-sig{background:rgba(16,185,129,0.15);color:#34D399}

.code-block{background:rgba(5,4,12,0.8);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;overflow-x:auto;font-family:'SF Mono','Fira Code',monospace;font-size:0.8rem;line-height:1.7;color:var(--text-muted);white-space:pre;tab-size:2}

/* Claims Grid */
.claims-grid{display:flex;flex-direction:column;gap:8px}
.claim-row{display:flex;align-items:flex-start;gap:12px;padding:8px 12px;background:rgba(0,0,0,0.2);border-radius:var(--radius-sm);border:1px solid transparent;transition:border-color var(--transition)}
.claim-row:hover{border-color:var(--border)}
.claim-key{font-weight:600;font-size:0.85rem;color:var(--primary-light);min-width:80px;font-family:'SF Mono','Fira Code',monospace}
.claim-val{font-size:0.85rem;color:var(--text-muted);word-break:break-all;flex:1}
.claim-desc{font-size:0.75rem;color:var(--text-dim);margin-top:2px}

/* Timeline */
.timeline{position:relative;padding:16px 0}
.timeline-bar{height:6px;background:rgba(139,92,246,0.1);border-radius:3px;position:relative;overflow:hidden}
.timeline-fill{height:100%;border-radius:3px;transition:width 0.5s ease}
.timeline-fill.valid{background:linear-gradient(90deg,#10B981,#34D399)}
.timeline-fill.expired{background:linear-gradient(90deg,#EF4444,#F87171)}
.timeline-labels{display:flex;justify-content:space-between;margin-top:8px;font-size:0.75rem;color:var(--text-dim)}
.timeline-status{text-align:center;margin-top:12px;font-size:0.9rem;font-weight:600}
.timeline-status.valid{color:#34D399}
.timeline-status.expired{color:#F87171}

.sig-info{font-size:0.85rem;color:var(--text-muted);line-height:1.6}
.sig-info code{background:rgba(139,92,246,0.1);padding:2px 6px;border-radius:4px;font-size:0.8rem}

.btn{display:inline-flex;align-items:center;gap:6px;font-family:var(--font);font-size:0.85rem;font-weight:500;padding:8px 14px;border-radius:var(--radius-sm);border:none;cursor:pointer;transition:all var(--transition)}
.btn-sm{padding:6px 10px;font-size:0.8rem}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;box-shadow:0 4px 14px rgba(139,92,246,0.3)}
.btn-primary:hover{box-shadow:0 6px 20px rgba(139,92,246,0.45);transform:translateY(-1px)}
.btn-ghost{background:rgba(139,92,246,0.08);color:var(--primary-light);border:1px solid var(--border)}
.btn-ghost:hover{background:rgba(139,92,246,0.15)}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);padding:10px 20px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-size:0.85rem;font-weight:500;box-shadow:0 8px 32px rgba(139,92,246,0.4);opacity:0;transition:all 300ms ease;z-index:100;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.footer{text-align:center;padding:16px 0 32px;color:var(--text-dim);font-size:0.75rem}

@media(max-width:600px){.header{padding:24px 0 12px}.logo h1{font-size:1.3rem}section{padding:14px}.input-actions{flex-wrap:wrap}}