/* MASKERADE · CALC · style.css */
/* Accent: #64748b — cool slate */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --black:#070809;--surface:#0d1015;--surface-2:#131820;--surface-3:#181f28;
    --border:#1e2733;--border-hi:#28354a;
    --text-primary:#d8e4f0;--text-secondary:#6b8aaa;--text-muted:#3d5470;
    --accent:#64748b;--accent-bright:#94a3b8;--accent-ghost:rgba(100,116,139,.1);--accent-glow:rgba(100,116,139,.2);
    --ok-color:#30ffb8;--warn-color:#fbbf24;--red:#ff4466;
    --mono:ui-monospace,'Cascadia Code','SF Mono','Fira Code','Consolas','Courier New',monospace;
    --sans:'Gill Sans','Gill Sans MT','Optima','Trebuchet MS','Segoe UI','Helvetica Neue',system-ui,sans-serif;
    --radius:4px;--radius-lg:6px;--max-w:900px;
}
html{overflow-x:hidden;scroll-behavior:smooth}
body{background:var(--black);color:var(--text-primary);font-family:var(--mono);font-size:16px;line-height:1.75;overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none}
.scanlines{pointer-events:none;position:fixed;inset:0;z-index:9999;background-image:radial-gradient(circle,rgba(255,255,255,.06) 1px,transparent 1px);background-size:24px 24px}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.blink{animation:blink 1s step-end infinite}
.section-label,.panel-label{font-family:var(--mono);font-size:12px;color:var(--text-secondary);letter-spacing:.15em;text-transform:uppercase;margin-bottom:14px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(7,8,9,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:0 2rem;height:56px;display:flex;align-items:center;justify-content:space-between}
.header-left{display:flex;align-items:center;gap:.75rem;font-size:13px}
.back-link{color:var(--text-muted);letter-spacing:.08em;transition:color .2s}.back-link:hover{color:var(--accent-bright)}
.header-sep{color:var(--text-muted)}.tool-id{color:var(--accent-bright);letter-spacing:.12em;font-size:13px}
.tool-badge{display:flex;align-items:center;gap:.4rem;font-size:11px;color:var(--text-muted);letter-spacing:.1em;text-transform:uppercase;border:1px solid var(--border);border-radius:20px;padding:3px 10px}
.badge-dot{color:var(--accent-bright);font-size:10px}
.tool-hero{border-bottom:1px solid var(--border);background:var(--surface)}
.tool-hero-inner{max-width:var(--max-w);margin:0 auto;padding:2rem 2rem 1.5rem}
.tool-headline{font-family:var(--sans);font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;letter-spacing:-.03em;color:#d8e4f0;line-height:1.1;margin-bottom:.5rem}
.tool-headline .accent{color:var(--accent-bright)}
.tool-sub{font-size:13px;color:var(--text-secondary);max-width:62ch;line-height:1.75}
/* Quick-nav */
.tool-quick-nav{position:sticky;top:56px;z-index:90;background:rgba(0,0,0,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.tqn-inner{max-width:var(--max-w);margin:0 auto;padding:.45rem 2rem;display:flex;align-items:center;gap:.85rem;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.tqn-inner::-webkit-scrollbar{display:none}
.tqn-label{font-family:var(--mono);font-size:10px;color:var(--text-muted);letter-spacing:.15em;white-space:nowrap;flex-shrink:0}
.tqn-pills{display:flex;gap:.25rem;flex-wrap:nowrap}
.qp{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--text-muted);background:transparent;border:1px solid transparent;border-radius:3px;padding:2px 7px;white-space:nowrap;flex-shrink:0;text-decoration:none;line-height:1.7;transition:color .15s,border-color .15s,background .15s}
.qp:hover,.qp.qp-active{color:var(--accent-bright);border-color:var(--accent-ghost);background:var(--accent-ghost)}
.qp.qp-active{cursor:default;pointer-events:none}
/* Workspace */
.workspace{flex:1;max-width:var(--max-w);width:100%;margin:0 auto;padding:1.5rem 2rem 3rem;display:flex;flex-direction:column;gap:1.25rem}
/* Mode tabs */
.mode-tabs{display:flex;gap:.35rem;flex-wrap:wrap}
.mode-tab{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--text-muted);background:transparent;border:1px solid var(--border-hi);border-radius:var(--radius);padding:5px 14px;cursor:pointer;transition:all .15s}
.mode-tab:hover{color:var(--text-secondary);border-color:var(--text-muted)}
.mode-tab.active{color:var(--accent-bright);border-color:rgba(148,163,184,.4);background:var(--accent-ghost)}
/* Calculator panel */
.calc-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
/* Display */
.calc-display{background:var(--surface-2);padding:2rem 1.25rem 1rem;border-bottom:1px solid var(--border);min-height:90px;display:flex;flex-direction:column;justify-content:flex-end;gap:.2rem;position:relative}
.calc-expression{font-size:12px;color:var(--text-muted);text-align:right;min-height:1.4em;word-break:break-all;letter-spacing:.04em}
.calc-result{font-size:2rem;color:var(--text-primary);text-align:right;letter-spacing:.02em;word-break:break-all;line-height:1.2}
.calc-result.large{font-size:2.4rem}
.calc-result.small{font-size:1.4rem}
.calc-hint{position:absolute;top:.5rem;left:.75rem;font-size:10px;color:var(--text-muted);letter-spacing:.1em;max-width:45%;white-space:nowrap;overflow:hidden}
.calc-deg-rad{position:absolute;top:.5rem;right:.75rem;font-size:10px;color:var(--text-muted);letter-spacing:.1em;cursor:pointer;padding:2px 6px;border:1px solid var(--border);border-radius:3px;max-width:45%;white-space:nowrap}
.calc-deg-rad:hover{color:var(--accent-bright)}
/* Button grid */
.calc-btns{display:grid;padding:.75rem;gap:.45rem}
.calc-btns.standard{grid-template-columns:repeat(4,1fr)}
.calc-btns.scientific{grid-template-columns:repeat(6,1fr)}
.cb{font-family:var(--mono);font-size:14px;background:var(--surface-3);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius);padding:0;height:52px;cursor:pointer;transition:all .12s;letter-spacing:.02em;display:flex;align-items:center;justify-content:center}
.cb:active,.cb.pressed{transform:scale(.93);background:var(--border-hi)}
.cb.op{color:var(--accent-bright);background:rgba(100,116,139,.08);border-color:rgba(100,116,139,.2)}
.cb.fn{color:var(--text-secondary);background:var(--surface-2);font-size:11px;letter-spacing:.04em}
.cb.eq{background:var(--accent-bright);color:var(--black);font-weight:bold;border-color:var(--accent-bright)}
.cb.eq:hover{filter:brightness(1.15);box-shadow:0 0 16px var(--accent-glow)}
.cb.clear{color:var(--red)}
.cb.zero{grid-column:span 2}
.cb.wide{font-size:12px;letter-spacing:.03em}
/* History */
.history-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1rem 1.25rem;max-height:220px;overflow-y:auto}
.history-entry{font-size:12px;color:var(--text-secondary);padding:.3rem 0;border-bottom:1px solid rgba(255,255,255,.04);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;cursor:pointer;transition:color .15s}
.history-entry:hover{color:var(--text-primary)}
.history-entry:last-child{border-bottom:none}
.history-expr{color:var(--text-muted)}
.history-val{color:var(--accent-bright)}
.history-empty{font-size:12px;color:var(--text-muted);text-align:center;padding:.75rem 0}
/* Graph panel */
.graph-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.graph-controls{padding:1rem 1.25rem;border-bottom:1px solid var(--border);display:flex;flex-wrap:wrap;gap:.75rem;align-items:flex-end}
.graph-field{display:flex;flex-direction:column;gap:.3rem;flex:1;min-width:160px}
.graph-field label{font-size:11px;color:var(--text-secondary);letter-spacing:.1em;text-transform:uppercase}
.graph-input{font-family:var(--mono);font-size:13px;background:var(--surface-2);color:var(--text-primary);border:1px solid var(--border-hi);border-radius:var(--radius);padding:7px 10px;outline:none;width:100%;transition:border-color .2s}
.graph-input:focus{border-color:var(--accent-bright);box-shadow:0 0 0 2px var(--accent-ghost)}
.graph-canvas-wrap{position:relative;background:var(--black)}
#graph-canvas{display:block;width:100%;touch-action:none}
.graph-info{padding:.5rem 1rem;font-size:11px;color:var(--text-muted);border-top:1px solid var(--border);display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border-hi);border-radius:var(--radius);font-family:var(--mono);font-size:12px;letter-spacing:.05em;cursor:pointer;padding:7px 14px;transition:all .15s}
.btn-ghost:hover{color:var(--text-primary);border-color:var(--text-muted)}
/* Keyboard hint */
.kbd-hint{font-size:11px;color:var(--text-muted);padding:.6rem 1.25rem;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;gap:.35rem .75rem}
.kbd{display:inline-block;font-family:var(--mono);font-size:10px;color:var(--text-muted);background:var(--surface-2);border:1px solid var(--border-hi);border-radius:3px;padding:1px 5px}
/* Footer */
.site-footer{border-top:1px solid var(--border);padding:1.25rem 2rem;margin-top:auto}
.footer-inner{max-width:var(--max-w);margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.footer-logo{font-size:13px;color:var(--text-muted);letter-spacing:.1em;transition:color .2s}.footer-logo:hover{color:var(--accent-bright)}
.footer-note{font-size:11px;color:var(--text-muted)}
.disclaimer-bar{border-top:1px solid var(--border);padding:1.25rem 2rem;background:var(--surface)}
.disclaimer-inner{max-width:var(--max-w);margin:0 auto;display:flex;flex-direction:column;gap:.5rem}
.disclaimer-label{font-size:10px;color:var(--text-muted);letter-spacing:.15em;text-transform:uppercase}
.disclaimer-text{font-size:12px;color:var(--text-secondary);line-height:1.8;max-width:90ch}
.disclaimer-text strong{color:var(--text-primary);font-weight:normal}
@media print{
    .scanlines,.site-header,.tool-quick-nav,.tool-hero,.mode-tabs,.kb-hint,.site-footer,.disclaimer-bar{display:none!important}
    body{background:#fff!important;color:#000!important}
    .calc-panel,.graph-panel,.history-panel{border:1px solid #ccc!important;background:#fff!important}
    .calc-display{background:#f5f5f5!important}
    .calc-result{color:#000!important}.calc-expression{color:#555!important}
    .history-entry{color:#000!important}.history-val{color:#333!important;font-weight:bold}
    .cb{background:#f0f0f0!important;color:#000!important;border-color:#ccc!important}
    .workspace::before{content:'MASKERADE.ME — Calculator';display:block;font-weight:bold;font-size:14px;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid #000}
}
@media(max-width:640px){
    .header-inner{padding:0 1rem}.tool-hero-inner,.workspace{padding-left:1rem;padding-right:1rem}
    .tool-badge{display:none}
    .calc-btns.scientific{grid-template-columns:repeat(4,1fr)}
    .cb{height:46px;font-size:13px}
    .cb.fn{font-size:10px}
    .calc-result{font-size:1.6rem}
    .tqn-inner{padding:.4rem 1rem;gap:.5rem}.tqn-label{display:none}.qp{font-size:10px;padding:2px 5px}
    .graph-field{min-width:120px}
}

/* ── Timecode mode additions ─────────────────────────────────────── */
/* FPS selector — positioned like calc-deg-rad but on the right */
.tc-fps-sel {
    position: absolute;
    top: .4rem;
    right: .75rem;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--text-muted);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 2px 5px;
    cursor: pointer;
    letter-spacing: .08em;
    outline: none;
    max-width: 45%;
}
.tc-fps-sel:hover { color: var(--accent-bright); border-color: var(--border-hi); }

/* TC secondary display — frame count below TC result */
.tc-secondary {
    font-size: 11px;
    color: var(--accent-bright);
    text-align: right;
    letter-spacing: .05em;
    opacity: .60;
    margin-top: .1rem;
    font-family: var(--mono);
}
.tc-secondary.invalid {
    color: var(--red);
    opacity: 1;
}

/* History meta annotation for TC entries */
.history-meta {
    flex-basis: 100%;
    font-size: 10px;
    color: #c8922a;
    opacity: .65;
    letter-spacing: .03em;
    margin-top: 1px;
}

/* Print: update workspace label for v0.37 */
@media print {
    .workspace::before { content: 'timecode.tools — Calculator'; }
}