/* ═══════════ HEALTHSCAN AI — DARK DIAGNOSTIC THEME ═══════════ */
:root {
    --blue:      #3B82F6;
    --blue-lt:   #60A5FA;
    --sky:       #38BDF8;
    --cyan:      #22D3EE;
    --green:     #34D399;
    --purple:    #A78BFA;
    --red:       #F87171;
    --yellow:    #FBBF24;

    --txt-primary:   #E8EDF7;
    --txt-secondary: #94A3B8;
    --txt-muted:     #64748B;

    --bg-app:    #0A0F1E;
    --bg-card:   #0D1426;
    --bg-subtle: #111A30;
    --bg-deep:   #070B16;
    --border:    rgba(59,130,246,.14);
    --border-lt: rgba(148,163,184,.12);

    --glow-blue:   0 0 24px rgba(59,130,246,.25);
    --glow-strong: 0 0 40px rgba(56,189,248,.35);
    --sh-card:  0 4px 24px rgba(0,0,0,.45);
    --sh-btn:   0 4px 20px rgba(59,130,246,.4);

    --r: 16px; --r-sm: 10px; --r-xs: 6px;
    --ease: cubic-bezier(.4,0,.2,1);
}

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

body {
    font-family:'Inter',sans-serif;
    background:var(--bg-app);
    color:var(--txt-primary);
    min-height:100vh;
}
/* Ambient radial glow behind the whole app */
body::before {
    content:''; position:fixed; inset:0; z-index:-1; pointer-events:none;
    background:
        radial-gradient(ellipse 60% 40% at 80% -10%, rgba(59,130,246,.12), transparent 60%),
        radial-gradient(ellipse 50% 35% at 10% 110%, rgba(124,58,237,.08), transparent 60%);
}
a { text-decoration:none; }

::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:var(--bg-app); }
::-webkit-scrollbar-thumb { background:#1E293B; border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:#334155; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration:.01ms !important; transition-duration:.01ms !important; }
}

/* ─── Disclaimer ─── */
.disclaimer-bar {
    display:flex; align-items:center; gap:.6rem;
    background:linear-gradient(90deg,#0C1B3D,#102A5C);
    border-bottom:1px solid var(--border);
    color:rgba(232,237,247,.85);
    padding:.45rem 1.5rem; font-size:.75rem; line-height:1.4;
}
.disc-icon { font-size:.9rem; flex-shrink:0; }
.disclaimer-bar span { flex:1; }
.disc-close {
    background:rgba(255,255,255,.08); border:none; color:#CBD5E1;
    width:22px; height:22px; border-radius:50%; cursor:pointer;
    font-size:.72rem; flex-shrink:0;
    display:flex; align-items:center; justify-content:center;
    transition:background .2s;
}
.disc-close:hover { background:rgba(255,255,255,.18); }

.app-shell { display:flex; min-height:calc(100vh - 32px); }
.main { flex:1; padding:1.75rem 2rem; overflow-y:auto; min-width:0; }

/* ─── Sidebar ─── */
.sidebar {
    width:256px; flex-shrink:0;
    background:var(--bg-card);
    border-right:1px solid var(--border-lt);
    padding:1.5rem 1rem;
    display:flex; flex-direction:column; gap:.25rem;
}
.sidebar-logo { display:flex; align-items:center; gap:.65rem; padding:.25rem .5rem; margin-bottom:1.75rem; }
.logo-mark {
    width:34px; height:34px;
    background:linear-gradient(135deg,var(--blue),var(--sky));
    border-radius:9px; flex-shrink:0;
    display:flex; align-items:center; justify-content:center;
    box-shadow:var(--glow-blue);
    animation:logoPulse 4s ease-in-out infinite;
}
@keyframes logoPulse {
    0%,100% { box-shadow:0 0 14px rgba(59,130,246,.3); }
    50%     { box-shadow:0 0 28px rgba(56,189,248,.5); }
}
.logo-text { font-size:1.05rem; color:var(--txt-primary); letter-spacing:-.3px; }
.logo-ai {
    background:linear-gradient(90deg,var(--blue-lt),var(--cyan));
    -webkit-background-clip:text; -webkit-text-fill-color:transparent;
    font-weight:800; margin-left:2px;
}

.nav-label { font-size:.65rem; font-weight:700; color:var(--txt-muted); letter-spacing:.08em; padding:.25rem .75rem; margin-top:.25rem; }
.nav-item {
    display:flex; align-items:center; gap:.65rem;
    padding:.6rem .75rem; border-radius:var(--r-sm);
    font-size:.84rem; font-weight:500; color:var(--txt-secondary);
    transition:all .2s var(--ease); margin-bottom:.1rem;
    border:1px solid transparent;
}
.nav-item:hover { background:rgba(59,130,246,.08); color:var(--blue-lt); transform:translateX(3px); }
.nav-item.active {
    background:rgba(59,130,246,.12); color:var(--blue-lt); font-weight:600;
    border-color:rgba(59,130,246,.25);
    box-shadow:inset 0 0 18px rgba(59,130,246,.06);
}

.sidebar-footer { margin-top:auto; padding-top:1rem; border-top:1px solid var(--border-lt); }

.engine-status {
    display:flex; align-items:center; gap:.65rem;
    background:rgba(52,211,153,.07); border:1px solid rgba(52,211,153,.25);
    border-radius:var(--r-sm); padding:.6rem .75rem; margin-bottom:.6rem;
    animation:engineGlow 3s ease-in-out infinite;
}
@keyframes engineGlow {
    0%,100% { box-shadow:0 0 0 rgba(52,211,153,0); }
    50%     { box-shadow:0 0 18px rgba(52,211,153,.15); }
}
.engine-dot {
    width:9px; height:9px; background:var(--green); border-radius:50%; flex-shrink:0;
    box-shadow:0 0 0 3px rgba(52,211,153,.2), 0 0 10px rgba(52,211,153,.6);
    animation:blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.35} }
.engine-label { font-size:.78rem; font-weight:600; color:#6EE7B7; }
.engine-sub   { font-size:.69rem; color:#34D399; margin-top:.1rem; }

/* ECG heartbeat line */
.ecg-wrap { height:26px; overflow:hidden; margin-bottom:.7rem; opacity:.85; }
.ecg-line { stroke:var(--cyan); stroke-width:1.5; fill:none; filter:drop-shadow(0 0 4px rgba(34,211,238,.7)); stroke-dasharray:300; stroke-dashoffset:300; animation:ecg 3.2s linear infinite; }
@keyframes ecg { 0%{stroke-dashoffset:300} 70%{stroke-dashoffset:0} 100%{stroke-dashoffset:0} }

.class-tags { display:flex; flex-wrap:wrap; gap:.3rem; }
.tag { font-size:.67rem; font-weight:700; padding:.2rem .5rem; border-radius:50px; text-transform:uppercase; letter-spacing:.04em; border:1px solid; }
.tag.covid  { background:rgba(248,113,113,.1); color:#FCA5A5; border-color:rgba(248,113,113,.3); }
.tag.normal { background:rgba(52,211,153,.1); color:#6EE7B7; border-color:rgba(52,211,153,.3); }
.tag.pneu   { background:rgba(251,191,36,.1); color:#FCD34D; border-color:rgba(251,191,36,.3); }
.tag.tb     { background:rgba(167,139,250,.1); color:#C4B5FD; border-color:rgba(167,139,250,.3); }

.creator-credit {
    margin-top:1.5rem; text-align:center; font-size:.65rem;
    color:var(--txt-muted); font-weight:600; letter-spacing:.05em;
    display:flex; align-items:center; justify-content:center; gap:.3rem;
}

/* ─── Page header ─── */
.page-header { display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:1.25rem; }
.page-title {
    font-size:1.6rem; font-weight:800; letter-spacing:-.5px;
    background:linear-gradient(90deg,#E8EDF7,#94A3B8);
    -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
.page-sub { font-size:.8rem; color:var(--txt-muted); margin-top:.2rem; }
.header-chip {
    display:flex; align-items:center; gap:.35rem;
    background:rgba(59,130,246,.1); color:var(--blue-lt);
    border:1px solid rgba(59,130,246,.3);
    border-radius:50px; padding:.35rem .85rem;
    font-size:.72rem; font-weight:700; letter-spacing:.04em; white-space:nowrap;
}

/* ─── Stat strip ─── */
.stat-strip {
    display:flex; align-items:center;
    background:var(--bg-card); border:1px solid var(--border-lt);
    border-radius:var(--r); padding:.85rem 1.75rem; margin-bottom:1.5rem;
    box-shadow:var(--sh-card);
}
.stat { flex:1; text-align:center; }
.sv {
    display:block; font-size:1.15rem; font-weight:800; letter-spacing:-.3px;
    background:linear-gradient(90deg,var(--blue-lt),var(--cyan));
    -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
.sl { display:block; font-size:.7rem; color:var(--txt-muted); margin-top:.15rem; font-weight:500; }
.sep { width:1px; height:36px; background:var(--border-lt); }

/* ─── Grid & cards ─── */
.grid { display:grid; grid-template-columns:1fr 1.2fr; grid-template-rows:auto auto; gap:1.25rem; }
.card {
    background:var(--bg-card); border:1px solid var(--border-lt);
    border-radius:var(--r); padding:1.35rem;
    box-shadow:var(--sh-card);
    transition:border-color .25s var(--ease), box-shadow .25s var(--ease);
    position:relative; overflow:hidden;
}
.card:hover { border-color:rgba(59,130,246,.3); box-shadow:var(--sh-card), var(--glow-blue); }

.card-head { display:flex; align-items:center; gap:.75rem; margin-bottom:1.1rem; }
.chip-icon { width:34px; height:34px; border-radius:9px; flex-shrink:0; display:flex; align-items:center; justify-content:center; }
.chip-icon.blue   { background:linear-gradient(135deg,var(--blue),var(--sky)); box-shadow:var(--glow-blue); }
.chip-icon.purple { background:linear-gradient(135deg,#7C3AED,var(--purple)); box-shadow:0 0 18px rgba(124,58,237,.3); }
.ch { font-size:.93rem; font-weight:700; color:var(--txt-primary); }
.cs { font-size:.73rem; color:var(--txt-muted); margin-top:.1rem; }

/* ─── Upload card ─── */
.upload-card { grid-column:1; grid-row:1; }

.drop-zone {
    position:relative; border:2px dashed rgba(59,130,246,.35);
    border-radius:var(--r-sm); cursor:pointer;
    transition:all .22s var(--ease); margin-bottom:.9rem;
    overflow:hidden; background:var(--bg-subtle);
    animation:breathe 4s ease-in-out infinite;
}
@keyframes breathe {
    0%,100% { border-color:rgba(59,130,246,.25); box-shadow:0 0 0 rgba(59,130,246,0); }
    50%     { border-color:rgba(56,189,248,.55); box-shadow:0 0 22px rgba(59,130,246,.12); }
}
.drop-zone:hover {
    animation:none;
    border-color:var(--sky); background:rgba(59,130,246,.07);
    box-shadow:0 0 0 4px rgba(59,130,246,.12), var(--glow-blue);
}
.drop-zone.active {
    animation:none;
    border-color:var(--cyan); background:rgba(34,211,238,.08);
    box-shadow:0 0 0 4px rgba(34,211,238,.18), var(--glow-strong);
}
.drop-zone.dropped { animation:dropBurst .5s var(--ease); }
@keyframes dropBurst {
    0%   { box-shadow:0 0 0 0 rgba(56,189,248,.6); }
    100% { box-shadow:0 0 0 26px rgba(56,189,248,0); }
}

.dz-content { display:flex; flex-direction:column; align-items:center; text-align:center; padding:1.75rem 1rem; gap:.3rem; transition:opacity .2s; }
.drop-zone.active .dz-content { opacity:0; }
.dz-icon {
    width:64px; height:64px; border-radius:50%;
    background:rgba(59,130,246,.1); border:1px solid rgba(59,130,246,.3);
    display:flex; align-items:center; justify-content:center;
    margin-bottom:.65rem; transition:transform .25s var(--ease);
}
.drop-zone:hover .dz-icon { transform:translateY(-4px); box-shadow:var(--glow-blue); }
.dz-title { font-size:.92rem; font-weight:600; color:var(--txt-primary); }
.dz-sub   { font-size:.78rem; color:var(--txt-muted); }
.dz-link  { color:var(--blue-lt); font-weight:600; text-decoration:underline; cursor:pointer; }
.dz-overlay {
    position:absolute; inset:0;
    background:linear-gradient(135deg,rgba(59,130,246,.15),rgba(34,211,238,.15));
    display:flex; align-items:center; justify-content:center;
    font-size:1rem; font-weight:600; color:var(--cyan);
    opacity:0; pointer-events:none; transition:opacity .2s;
}
.drop-zone.active .dz-overlay { opacity:1; }

.upload-badges { display:flex; gap:.65rem; }
.ubadge {
    flex:1; display:flex; align-items:center; gap:.4rem;
    background:var(--bg-subtle); border:1px solid var(--border-lt);
    border-radius:var(--r-xs); padding:.5rem .65rem;
    font-size:.72rem; color:var(--txt-secondary); font-weight:500;
    transition:border-color .2s, transform .2s;
}
.ubadge:hover { border-color:rgba(59,130,246,.4); transform:translateY(-2px); }

/* ─── Results card ─── */
.results-card { grid-column:2; grid-row:1/3; }
.hidden { display:none !important; }

/* Staggered entrance */
.results-card.show .diagnosis-hero,
.results-card.show .comparison,
.results-card.show .conf-section,
.results-card.show .breakdown,
.results-card.show .inline-disclaimer,
.results-card.show .btn-reset {
    animation:slideUp .55s var(--ease) backwards;
}
.results-card.show .comparison        { animation-delay:.1s; }
.results-card.show .conf-section      { animation-delay:.2s; }
.results-card.show .breakdown         { animation-delay:.3s; }
.results-card.show .inline-disclaimer { animation-delay:.4s; }
.results-card.show .btn-reset         { animation-delay:.45s; }
@keyframes slideUp {
    from { opacity:0; transform:translateY(18px); }
    to   { opacity:1; transform:translateY(0); }
}

/* Loading overlay + scan line */
.loading-overlay {
    position:absolute; inset:0; z-index:10;
    background:rgba(10,15,30,.88); backdrop-filter:blur(6px);
    display:flex; flex-direction:column;
    align-items:center; justify-content:center; gap:1.1rem;
    border-radius:var(--r);
}
.scan-frame {
    position:relative; width:150px; height:150px;
    border-radius:var(--r-sm); overflow:hidden;
    border:1px solid rgba(59,130,246,.4);
    background:var(--bg-deep);
}
.scan-frame img { width:100%; height:100%; object-fit:cover; opacity:.55; display:block; }
.scan-beam {
    position:absolute; left:0; right:0; top:-12%; height:12%;
    background:linear-gradient(to bottom, transparent, rgba(34,211,238,.85), transparent);
    box-shadow:0 0 22px rgba(34,211,238,.9);
    animation:scanSweep 1.6s ease-in-out infinite;
}
@keyframes scanSweep { 0%{top:-12%} 50%{top:100%} 100%{top:-12%} }
.scan-corners::before, .scan-corners::after {
    content:''; position:absolute; width:16px; height:16px;
    border:2px solid var(--cyan);
}
.scan-corners::before { top:6px; left:6px; border-right:none; border-bottom:none; }
.scan-corners::after  { bottom:6px; right:6px; border-left:none; border-top:none; }
.loading-overlay p { font-size:.85rem; font-weight:600; color:var(--txt-secondary); letter-spacing:.04em; }
.loading-dots::after { content:''; animation:dots 1.4s steps(4,end) infinite; }
@keyframes dots { 0%{content:''} 25%{content:'.'} 50%{content:'..'} 75%{content:'...'} }

/* Diagnosis hero */
.diagnosis-hero {
    display:flex; align-items:center; justify-content:space-between;
    background:linear-gradient(135deg, rgba(59,130,246,.08), rgba(34,211,238,.05));
    border:1px solid rgba(59,130,246,.25);
    border-radius:var(--r-sm); padding:1rem 1.25rem;
    margin-bottom:1.1rem; transition:all .4s var(--ease);
}
.diagnosis-hero.covid-bg     { background:linear-gradient(135deg,rgba(248,113,113,.1),rgba(248,113,113,.03)); border-color:rgba(248,113,113,.35); box-shadow:0 0 28px rgba(248,113,113,.1); }
.diagnosis-hero.normal-bg    { background:linear-gradient(135deg,rgba(52,211,153,.1),rgba(52,211,153,.03));  border-color:rgba(52,211,153,.35);  box-shadow:0 0 28px rgba(52,211,153,.1); }
.diagnosis-hero.pneumonia-bg { background:linear-gradient(135deg,rgba(251,191,36,.1),rgba(251,191,36,.03));  border-color:rgba(251,191,36,.35);  box-shadow:0 0 28px rgba(251,191,36,.1); }
.diagnosis-hero.tb-bg        { background:linear-gradient(135deg,rgba(167,139,250,.1),rgba(167,139,250,.03)); border-color:rgba(167,139,250,.35); box-shadow:0 0 28px rgba(167,139,250,.1); }

.dh-label { font-size:.62rem; font-weight:800; letter-spacing:.1em; color:var(--txt-muted); margin-bottom:.3rem; }
.dh-name {
    font-size:1.7rem; font-weight:800; letter-spacing:-.5px;
    color:var(--blue-lt); text-transform:uppercase; transition:color .4s;
    min-height:1.2em;
}
.dh-name .caret { display:inline-block; width:3px; height:1em; background:currentColor; margin-left:3px; vertical-align:-2px; animation:caretBlink .7s steps(1) infinite; }
@keyframes caretBlink { 50%{opacity:0} }
.dh-name.covid-txt     { color:var(--red);    text-shadow:0 0 18px rgba(248,113,113,.45); }
.dh-name.normal-txt    { color:var(--green);  text-shadow:0 0 18px rgba(52,211,153,.45); }
.dh-name.pneumonia-txt { color:var(--yellow); text-shadow:0 0 18px rgba(251,191,36,.45); }
.dh-name.tb-txt        { color:var(--purple); text-shadow:0 0 18px rgba(167,139,250,.45); }

.dh-confidence { position:relative; width:64px; height:64px; flex-shrink:0; }
#conf-ring { transition:stroke-dashoffset 1.3s var(--ease), stroke .4s; filter:drop-shadow(0 0 6px currentColor); }
.ring-track { stroke:rgba(148,163,184,.15); }
.ring-pct { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; font-size:.72rem; font-weight:800; color:var(--txt-primary); }

/* Comparison */
.comparison { display:flex; align-items:stretch; gap:.6rem; margin-bottom:1rem; }
.comp-panel { flex:1; display:flex; flex-direction:column; gap:.4rem; }
.comp-label { display:flex; align-items:center; gap:.35rem; font-size:.7rem; font-weight:700; color:var(--txt-secondary); letter-spacing:.03em; }
.dot { width:7px; height:7px; border-radius:50%; }
.gray-dot { background:var(--txt-muted); }
.heat-dot { background:#F87171; box-shadow:0 0 6px rgba(248,113,113,.8); }

.img-wrap {
    flex:1; position:relative; border-radius:var(--r-sm); overflow:hidden;
    border:1px solid var(--border-lt); background:var(--bg-deep); aspect-ratio:1/1;
}
.img-wrap img { width:100%; height:100%; object-fit:cover; display:block; transition:transform .3s var(--ease); }
.img-wrap:hover img { transform:scale(1.04); }
.img-wrap:hover { border-color:rgba(59,130,246,.45); box-shadow:var(--glow-blue); }

/* Heatmap dissolve reveal */
#heatmap-img { opacity:0; transition:opacity .9s ease .25s; }
#heatmap-img.revealed { opacity:1; }

.heatmap-wrap::after {
    content:''; position:absolute; inset:0;
    background:linear-gradient(to top, rgba(0,0,0,.45) 0%, transparent 40%);
    pointer-events:none;
}
.heatmap-legend {
    position:absolute; bottom:8px; left:50%; transform:translateX(-50%);
    display:flex; gap:.4rem; z-index:2;
    background:rgba(7,11,22,.75); border:1px solid var(--border-lt);
    border-radius:50px; padding:.25rem .6rem;
}
.leg-item { display:flex; align-items:center; gap:.25rem; font-size:.6rem; color:#E8EDF7; font-weight:600; }
.leg-dot { width:8px; height:8px; border-radius:50%; }
.leg-dot.hot  { background:#FF3B00; box-shadow:0 0 5px #FF3B00; }
.leg-dot.warm { background:#FFB800; box-shadow:0 0 5px #FFB800; }
.leg-dot.cold { background:#0060FF; box-shadow:0 0 5px #0060FF; }

.comp-bridge { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:.3rem; flex-shrink:0; padding:.4rem 0; }
.bridge-line { flex:1; width:1px; background:linear-gradient(to bottom, transparent, rgba(59,130,246,.5), transparent); min-height:12px; }
.bridge-chip {
    background:linear-gradient(135deg,var(--blue),var(--sky));
    color:#fff; border-radius:50px; padding:.28rem .55rem;
    font-size:.65rem; font-weight:800; white-space:nowrap; letter-spacing:.03em;
    box-shadow:var(--glow-blue);
    animation:chipFloat 3s ease-in-out infinite;
}
@keyframes chipFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-3px)} }

/* Confidence bar */
.conf-section { margin-bottom:.9rem; }
.conf-row { display:flex; justify-content:space-between; align-items:baseline; margin-bottom:.45rem; }
.conf-lbl { font-size:.75rem; font-weight:700; color:var(--txt-secondary); }
.conf-pct { font-size:1.1rem; font-weight:800; color:var(--blue-lt); letter-spacing:-.3px; }
.conf-track { height:12px; background:rgba(148,163,184,.12); border-radius:50px; overflow:hidden; box-shadow:inset 0 1px 4px rgba(0,0,0,.5); }
.conf-fill {
    width:0%; height:100%;
    background:linear-gradient(90deg, var(--blue), var(--cyan));
    border-radius:50px; position:relative;
    transition:width 1.3s cubic-bezier(.4,0,.15,1);
    box-shadow:0 0 14px rgba(56,189,248,.6);
    overflow:hidden;
}
.conf-fill::before {
    content:''; position:absolute; inset:0;
    background:linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
    transform:translateX(-100%);
    animation:shimmer 2.2s ease-in-out 1.4s infinite;
}
@keyframes shimmer { 100%{transform:translateX(100%)} }

/* Breakdown with animated mini bars */
.breakdown { display:grid; grid-template-columns:1fr 1fr; gap:.5rem; margin-bottom:.9rem; }
.bk-item {
    background:var(--bg-subtle); border:1px solid var(--border-lt);
    border-radius:var(--r-xs); padding:.55rem .75rem;
    transition:border-color .2s, transform .2s;
    opacity:0; animation:slideUp .45s var(--ease) forwards;
}
.bk-item:nth-child(1){animation-delay:.35s} .bk-item:nth-child(2){animation-delay:.45s}
.bk-item:nth-child(3){animation-delay:.55s} .bk-item:nth-child(4){animation-delay:.65s}
.bk-item:hover { border-color:rgba(59,130,246,.4); transform:translateY(-2px); }
.bk-name  { font-size:.68rem; font-weight:700; text-transform:capitalize; color:var(--txt-muted); margin-bottom:.25rem; }
.bk-score { font-size:1rem; font-weight:800; margin-bottom:.35rem; }
.bk-track { height:5px; background:rgba(148,163,184,.12); border-radius:50px; overflow:hidden; }
.bk-fill  { height:100%; width:0%; border-radius:50px; transition:width 1s var(--ease) .6s; }

.inline-disclaimer {
    display:flex; align-items:flex-start; gap:.45rem;
    background:rgba(251,191,36,.07); border:1px solid rgba(251,191,36,.3);
    border-radius:var(--r-xs); padding:.55rem .75rem;
    font-size:.72rem; color:#FCD34D; line-height:1.5; margin-bottom:.9rem;
}
.inline-disclaimer svg { flex-shrink:0; margin-top:1px; }

.btn-reset {
    width:100%; padding:.8rem;
    background:linear-gradient(135deg,var(--blue),var(--sky));
    color:#fff; border:none; border-radius:var(--r-sm);
    font-family:'Inter',sans-serif; font-size:.86rem; font-weight:700;
    cursor:pointer; display:flex; align-items:center;
    justify-content:center; gap:.5rem; letter-spacing:.02em;
    transition:all .22s var(--ease); box-shadow:var(--sh-btn);
}
.btn-reset:hover { transform:translateY(-2px); box-shadow:0 8px 26px rgba(56,189,248,.5); }
.btn-reset:active { transform:translateY(0) scale(.99); }

/* ─── System card ─── */
.system-card { grid-column:1; grid-row:2; }
.checks { list-style:none; margin-bottom:1rem; }
.checks li {
    display:flex; align-items:center; gap:.6rem;
    padding:.42rem 0; border-bottom:1px solid var(--border-lt);
    font-size:.8rem; color:var(--txt-secondary);
}
.checks li:last-child { border-bottom:none; }
.ck {
    width:20px; height:20px;
    background:rgba(52,211,153,.12); color:var(--green);
    border:1px solid rgba(52,211,153,.3);
    border-radius:50%; display:flex; align-items:center; justify-content:center;
    font-size:.65rem; font-weight:800; flex-shrink:0;
}
.how-it-works { border-top:1px solid var(--border-lt); padding-top:.85rem; }
.hw-title { font-size:.65rem; font-weight:800; color:var(--txt-muted); letter-spacing:.08em; margin-bottom:.65rem; }
.hw-step { display:flex; align-items:center; gap:.65rem; font-size:.78rem; color:var(--txt-secondary); margin-bottom:.4rem; }
.hw-num {
    width:20px; height:20px;
    background:linear-gradient(135deg,var(--blue),var(--sky));
    color:#fff; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    font-size:.65rem; font-weight:700; flex-shrink:0;
    box-shadow:0 0 8px rgba(59,130,246,.4);
}

/* ─── Mobile ─── */
@media (max-width: 768px) {
    .app-shell { flex-direction:column; }
    .sidebar {
        width:100%; padding:1rem;
        border-right:none; border-bottom:1px solid var(--border-lt);
        flex-direction:row; align-items:center; justify-content:space-between;
    }
    .sidebar-logo { margin-bottom:0; }
    .nav-label, .nav-item, .sidebar-footer { display:none !important; }
    .creator-credit { margin-top:0; }
    .main { padding:1rem; }
    .page-header { flex-direction:column; gap:.5rem; align-items:flex-start; }
    .grid { grid-template-columns:1fr; grid-template-rows:auto; }
    .upload-card { grid-column:1; grid-row:1; }
    .results-card { grid-column:1; grid-row:2; }
    .system-card { grid-column:1; grid-row:3; }
    .stat-strip { padding:.75rem; flex-wrap:wrap; gap:.5rem; }
    .sep { display:none; }
    .stat { flex:1 1 40%; }
    .sv { font-size:1rem; }
    .comparison { flex-direction:column; }
    .comp-bridge { flex-direction:row; padding:.5rem 0; }
    .bridge-line { height:1px; min-height:auto; width:30px; background:linear-gradient(to right, transparent, rgba(59,130,246,.5), transparent); }
}