:root {
    --bg: #090d16;
    --bg2: #0f172a;
    --card: #1e293b;
    --border: #334155;
    --text: #f8fafc;
    --muted: #94a3b8;
    --accent: #a78bfa;
    --header-color: #fb923c;
    --payload-color: #34d399;
    --sig-color: #60a5fa;
    --danger: #f87171;
    --success: #34d399;
    --warning: #fbbf24;
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.5; -webkit-font-smoothing: antialiased; }

/* Nav */
.navbar { background: rgba(15,23,42,.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 12px 20px; display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 22px; }
.logo-text { font-size: 18px; font-weight: 800; }
.accent { color: var(--accent); }
.badge { font-size: 11px; background: #6d28d9; color: #fff; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 14px; }
.privacy-chip { font-size: 12px; background: rgba(52,211,153,.1); border: 1px solid rgba(52,211,153,.3); color: #34d399; padding: 4px 10px; border-radius: 999px; }
.nav-link { color: var(--muted); text-decoration: none; font-size: 13px; }
.nav-link:hover { color: var(--text); }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Hero */
.hero { text-align: center; padding: 36px 0 20px; }
.hero h1 { font-size: 34px; font-weight: 800; letter-spacing: -1px; margin-bottom: 10px; }
.gradient-text { background: linear-gradient(135deg, #a78bfa, #60a5fa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.subtitle { color: var(--muted); font-size: 15px; max-width: 680px; margin: 0 auto; }

/* Status Bar */
.status-bar { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; font-weight: 500; border: 1px solid; }
.status-idle { background: rgba(51,65,85,.5); border-color: var(--border); color: var(--muted); }
.status-valid { background: rgba(52,211,153,.1); border-color: rgba(52,211,153,.4); color: #34d399; }
.status-expired { background: rgba(251,191,36,.1); border-color: rgba(251,191,36,.4); color: #fbbf24; }
.status-invalid { background: rgba(248,113,113,.1); border-color: rgba(248,113,113,.4); color: #f87171; }

/* Input Card */
.input-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 24px; }
.input-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.section-label { font-size: 14px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.input-actions { display: flex; gap: 8px; }
.btn-sm { background: var(--bg2); border: 1px solid var(--border); color: var(--text); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 6px; cursor: pointer; transition: all .2s; }
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm.danger:hover { border-color: var(--danger); color: var(--danger); }

.jwt-textarea { width: 100%; min-height: 100px; background: #0d1117; border: 1px solid #30363d; border-radius: 8px; padding: 14px; color: #58a6ff; font-family: var(--mono); font-size: 13px; line-height: 1.6; resize: vertical; outline: none; word-break: break-all; transition: border-color .2s; }
.jwt-textarea:focus { border-color: var(--accent); }
.jwt-textarea::placeholder { color: #4b5563; }

/* JWT Visual breakdown */
.jwt-visual { margin-top: 12px; font-family: var(--mono); font-size: 12px; line-height: 1.8; word-break: break-all; background: #0d1117; border: 1px solid #30363d; border-radius: 8px; padding: 12px 14px; }
.jwt-part { cursor: help; }
.header-text { color: var(--header-color); }
.payload-text { color: var(--payload-color); }
.sig-text { color: var(--sig-color); }
.jwt-dot { color: #6b7280; font-weight: 700; margin: 0 1px; }

/* Three Column Output */
.output-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 24px; }
@media (max-width: 900px) { .output-grid { grid-template-columns: 1fr; } }

.token-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; }
.token-card-header { display: flex; align-items: center; gap: 12px; padding: 14px 16px; }
.header-bg { background: rgba(251,146,60,.1); border-bottom: 1px solid rgba(251,146,60,.25); }
.payload-bg { background: rgba(52,211,153,.08); border-bottom: 1px solid rgba(52,211,153,.25); }
.sig-bg { background: rgba(96,165,250,.08); border-bottom: 1px solid rgba(96,165,250,.25); }
.card-icon { font-size: 20px; }
.token-card-header h3 { font-size: 14px; font-weight: 700; color: var(--text); margin: 0; }
.token-card-header p { font-size: 11px; color: var(--muted); margin: 0; }
.btn-copy-card { margin-left: auto; background: rgba(255,255,255,.05); border: 1px solid var(--border); color: var(--muted); font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 5px; cursor: pointer; transition: all .2s; }
.btn-copy-card:hover { color: var(--text); border-color: var(--accent); }

.json-display { padding: 14px 16px; font-family: var(--mono); font-size: 12.5px; line-height: 1.7; color: #e2e8f0; white-space: pre-wrap; word-break: break-word; overflow-x: auto; flex: 1; min-height: 160px; background: transparent; }
/* JSON Syntax Highlighting */
.json-key { color: #93c5fd; }
.json-string { color: #86efac; }
.json-number { color: #fdba74; }
.json-bool { color: #c084fc; }
.json-null { color: #9ca3af; }

.badge-row { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 16px; border-top: 1px solid var(--border); min-height: 40px; }
.claim-badge { font-size: 11px; font-weight: 600; padding: 3px 8px; border-radius: 4px; }
.badge-alg { background: rgba(251,146,60,.15); color: #fb923c; border: 1px solid rgba(251,146,60,.3); }
.badge-typ { background: rgba(167,139,250,.15); color: #a78bfa; border: 1px solid rgba(167,139,250,.3); }
.badge-valid { background: rgba(52,211,153,.15); color: #34d399; border: 1px solid rgba(52,211,153,.3); }
.badge-expired { background: rgba(251,191,36,.15); color: #fbbf24; border: 1px solid rgba(251,191,36,.3); }
.badge-claim { background: rgba(96,165,250,.1); color: #93c5fd; border: 1px solid rgba(96,165,250,.25); }

/* Signature Panel */
.sig-display { padding: 14px 16px; font-family: var(--mono); font-size: 12px; color: var(--sig-color); word-break: break-all; flex: 1; }
.sig-placeholder { color: #4b5563; font-style: italic; }
.sig-info { padding: 8px 16px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); }

/* HMAC Verify Section */
.verify-section { padding: 14px 16px; border-top: 1px solid var(--border); background: rgba(96,165,250,.04); }
.verify-label { font-size: 11px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; display: block; margin-bottom: 8px; }
.verify-row { display: flex; gap: 8px; }
.secret-input { flex: 1; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; color: var(--text); font-family: var(--mono); font-size: 12px; outline: none; }
.secret-input:focus { border-color: var(--accent); }
.btn-verify { background: #4f46e5; border: none; color: #fff; font-size: 12px; font-weight: 700; padding: 8px 14px; border-radius: 6px; cursor: pointer; transition: background .2s; }
.btn-verify:hover { background: #6d28d9; }
.verify-result { margin-top: 8px; font-size: 12px; font-weight: 600; min-height: 16px; }
.verify-ok { color: var(--success); }
.verify-fail { color: var(--danger); }

/* Claims Table */
.claims-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 24px; }
.card-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.claims-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.claims-table th { background: var(--bg2); color: var(--muted); font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: .5px; padding: 10px 14px; text-align: left; border-bottom: 2px solid var(--border); }
.claims-table td { padding: 10px 14px; border-bottom: 1px solid rgba(51,65,85,.6); color: var(--text); font-family: var(--mono); }
.claims-table tr:last-child td { border-bottom: none; }
.claims-table tr:hover td { background: rgba(255,255,255,.03); }
.status-ok { color: var(--success); font-weight: 700; }
.status-warn { color: var(--warning); font-weight: 700; }
.status-missing { color: var(--muted); font-style: italic; }

/* Tool Matrix */
.tool-matrix { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 24px; text-align: center; }
.matrix-title { font-size: 11px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; display: block; margin-bottom: 14px; }
.matrix-links { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.matrix-badge { background: var(--bg2); border: 1px solid var(--border); color: var(--text); text-decoration: none; font-size: 13px; padding: 8px 16px; border-radius: 8px; transition: all .2s; display: inline-flex; align-items: center; gap: 6px; }
.matrix-badge:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* Ad Wrapper */
.ad-wrapper { margin: 20px 0; text-align: center; }
.ad-container { display: inline-block; min-height: 90px; background: rgba(15,23,42,.6); border: 1px solid var(--border); border-radius: 8px; padding: 4px; max-width: 100%; overflow-x: auto; }
.ad-caption { font-size: 11px; color: #475569; margin-top: 6px; }

/* Donation Bar */
.donation-bar { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; padding: 12px 16px; background: rgba(245,158,11,.08); border: 1px solid rgba(245,158,11,.25); border-radius: 10px; margin-bottom: 30px; font-size: 13px; color: #f8fafc; }
.amazon-link { color: #fbbf24; text-decoration: none; font-weight: 700; }
.amazon-link:hover { text-decoration: underline; }
.btn-copy-email { background: none; border: 1px dashed rgba(251,191,36,.4); color: #fbbf24; font-size: 12px; font-family: var(--mono); padding: 3px 10px; border-radius: 5px; cursor: pointer; transition: all .2s; }
.btn-copy-email:hover { background: rgba(251,191,36,.1); }

/* Footer */
.footer { text-align: center; padding: 24px 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }

/* Toast */
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--success); color: #064e3b; padding: 10px 20px; border-radius: 8px; font-size: 13px; font-weight: 700; box-shadow: 0 8px 24px rgba(0,0,0,.4); opacity: 0; transform: translateY(10px); transition: all .2s; pointer-events: none; z-index: 9999; }
.toast.show { opacity: 1; transform: translateY(0); }