/* ================================================================
   PC Health Analyzer — styles.css
   Enterprise design system — dark/light themes via [data-theme]
   ================================================================ */

/* ── Design tokens ─────────────────────────────────────────────── */
:root {
  /* Surfaces */
  --bg-page:    #09090b;
  --bg-card:    #111115;
  --bg-raised:  #18181c;
  --bg-hover:   #1e1e24;
  --bg-input:   #16161a;

  /* Borders */
  --border:     #1f1f26;
  --border-mid: #2a2a34;
  --border-hi:  #3a3a48;

  /* Text */
  --text-1: #e8e8f0;
  --text-2: #8888a0;
  --text-3: #50506a;

  /* Semantic colors */
  --accent:  #4f8ef7;
  --ok:      #3ecf7a;
  --warn:    #f5a623;
  --danger:  #f74f4f;
  --purple:  #a07ef5;
  --teal:    #4fd4d4;

  /* Gradient accent */
  --accent-glow: rgba(79,142,247,.15);

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Mono', 'Cascadia Code', 'Consolas', monospace;
  --font-sans: 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* Layout */
  --radius-sm: 5px;
  --radius-md: 9px;
  --radius-lg: 14px;
  --header-h:  54px;
  --nav-h:     42px;
  --max-w:     1200px;

  /* Transitions */
  --trans: 0.15s ease;
}

[data-theme="light"] {
  --bg-page:    #f4f4f7;
  --bg-card:    #ffffff;
  --bg-raised:  #f8f8fb;
  --bg-hover:   #eeeef6;
  --bg-input:   #f0f0f5;
  --border:     #e0e0ea;
  --border-mid: #d0d0de;
  --border-hi:  #b8b8cc;
  --text-1: #111120;
  --text-2: #555570;
  --text-3: #9090a8;
  --accent-glow: rgba(79,142,247,.08);
}

/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-page);
  color: var(--text-1);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--trans), color var(--trans);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
[hidden] { display: none !important; }

/* ── UPLOAD SCREEN ──────────────────────────────────────────────── */
#screen-upload { min-height: 100vh; display: flex; flex-direction: column; }

.upload-header {
  height: 52px; padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-name { font-size: 13px; font-weight: 700; letter-spacing: .05em; }
.upload-header-links { display: flex; align-items: center; gap: 18px; font-size: 11px; color: var(--text-2); }
.upload-header-links a { color: var(--text-2); }
.upload-header-links a:hover { color: var(--text-1); text-decoration: none; }

.upload-main { flex: 1; max-width: 740px; margin: 0 auto; width: 100%; padding: 48px 24px 60px; }

.upload-hero { text-align: center; margin-bottom: 36px; }
.upload-hero h1 { font-size: 26px; font-weight: 800; letter-spacing: -.01em; margin-bottom: 10px; }
.upload-sub { color: var(--text-2); font-size: 13px; line-height: 1.8; }

.drop-zone { margin-bottom: 32px; }
.drop-inner {
  border: 1.5px dashed var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 52px 32px 44px;
  text-align: center;
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans);
}
.drop-inner.drag-over { border-color: var(--accent); background: var(--bg-hover); }
.drop-icon { display: block; margin: 0 auto 22px; color: var(--text-3); }
.drop-title { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.drop-hint { font-size: 12px; color: var(--text-2); line-height: 1.9; margin-bottom: 26px; }
.drop-hint strong { color: var(--text-1); }
#file-input { display: none; }

.upload-guide {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 8px;
  padding: 20px; border-radius: var(--radius-md);
  background: var(--bg-card); border: 1px solid var(--border);
  margin-bottom: 32px;
}
.guide-step { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text-2); }
.guide-num {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--bg-raised); border: 1px solid var(--border-mid);
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: var(--accent); flex-shrink: 0;
}
.guide-arrow { color: var(--text-3); font-size: 12px; }

.upload-features {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px;
}
.feature-card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; border-radius: var(--radius-md);
  background: var(--bg-card); border: 1px solid var(--border);
}
.feature-icon { font-size: 14px; color: var(--accent); }
.feature-card strong { font-size: 12px; color: var(--text-1); }
.feature-card span { font-size: 11px; color: var(--text-2); }

/* ── LOADING SCREEN ─────────────────────────────────────────────── */
#screen-loading {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 16px;
}
.loading-content { text-align: center; }
.loading-spinner {
  width: 40px; height: 40px;
  border: 2px solid var(--border-mid);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .75s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-status { font-size: 13px; color: var(--text-1); }
.loading-sub { font-size: 11px; color: var(--text-3); margin-top: 4px; }

/* ── APP HEADER ─────────────────────────────────────────────────── */
.app-header {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 22px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.app-header-left { display: flex; align-items: center; gap: 10px; font-size: 12px; }
.header-logo { flex-shrink: 0; }
.header-brand-name { font-weight: 700; font-size: 13px; letter-spacing: .04em; }
.header-sep { color: var(--text-3); }
.header-filename { color: var(--text-2); max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.app-header-right { display: flex; align-items: center; gap: 8px; }

.health-pill {
  display: flex; align-items: baseline; gap: 3px;
  padding: 4px 12px; border-radius: 20px;
  border: 1px solid var(--border-mid);
  font-size: 13px; font-weight: 700;
  transition: border-color var(--trans), color var(--trans);
}
.health-pill.ok     { border-color: var(--ok);     color: var(--ok);     background: rgba(62,207,122,.08); }
.health-pill.warn   { border-color: var(--warn);   color: var(--warn);   background: rgba(245,166,35,.08); }
.health-pill.danger { border-color: var(--danger); color: var(--danger); background: rgba(247,79,79,.08); }
.health-pill-label  { font-size: 10px; font-weight: 400; color: var(--text-3); }

/* ── TAB NAV ────────────────────────────────────────────────────── */
.tab-nav {
  display: flex; gap: 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 22px;
  position: sticky; top: var(--header-h); z-index: 99;
}
.tab-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 0 16px; height: var(--nav-h);
  background: none; border: none;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  color: var(--text-2);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--trans), border-color var(--trans);
  letter-spacing: .03em;
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text-1); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: 9px; font-size: 10px; font-weight: 700;
  background: var(--danger); color: #fff;
}

/* ── TAB PANES ──────────────────────────────────────────────────── */
.tab-pane { max-width: var(--max-w); margin: 0 auto; width: 100%; padding: 24px 22px 60px; }

/* ── CARDS ──────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
}
.card-label {
  font-size: 10px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 14px;
}
.card-label-sub { font-weight: 400; letter-spacing: 0; text-transform: none; color: var(--text-3); }

/* ── OVERVIEW TAB ───────────────────────────────────────────────── */
.overview-top {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  margin-bottom: 8px;
}

/* Health Score Ring */
.health-score-card { display: flex; flex-direction: column; align-items: center; padding: 20px 18px; }
.health-ring-wrap { position: relative; width: 130px; height: 130px; margin: 8px auto; }
.health-ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: var(--bg-raised); stroke-width: 8; }
.ring-track {
  fill: none; stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 314;
  stroke-dashoffset: 314;
  transition: stroke-dashoffset 1s ease, stroke .5s ease;
}
.health-ring-inner {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.health-score-num { font-size: 32px; font-weight: 800; line-height: 1; }
.health-score-denom { font-size: 10px; color: var(--text-3); }
.health-grade { font-size: 11px; font-weight: 700; margin-top: 2px; letter-spacing: .05em; }

.health-breakdown { width: 100%; margin-top: 12px; }
.breakdown-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 4px 0; border-bottom: 1px solid var(--border);
  font-size: 10px; color: var(--text-2);
}
.breakdown-row:last-child { border-bottom: none; }
.breakdown-deduct { font-weight: 700; }
.breakdown-deduct.sev-critical { color: var(--danger); }
.breakdown-deduct.sev-warning  { color: var(--warn);   }

/* Session Meta */
.session-info-wrap { display: flex; flex-direction: column; gap: 12px; }
.session-meta { padding: 14px 18px; }
.session-meta-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 11px; border-bottom: 1px solid var(--border); }
.session-meta-row:last-child { border-bottom: none; }
.session-meta-row span { color: var(--text-3); }

/* Activity Timeline */
.activity-card {}
.timeline-strip { display: flex; flex-direction: column; gap: 3px; }

/* Event marker dots row */
.tl-markers { display: flex; height: 8px; }
.tl-marker-slot { flex: 1; display: flex; align-items: center; justify-content: center; }
.tl-marker-dot {
  width: 5px; height: 5px; border-radius: 50%;
  animation: tlPulse 2s ease-in-out infinite;
}
.tl-marker-dot.warn { background: var(--warn); }
.tl-marker-dot.crit { background: var(--danger); }
@keyframes tlPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .4; }
}

/* Color strip */
.tl-inner {
  position: relative; display: flex; height: 18px;
  border-radius: 9px; overflow: hidden; gap: 1px; cursor: crosshair;
}
.tl-seg { flex: 1; min-width: 1px; height: 100%; transition: filter .1s; }
.tl-seg:hover { filter: brightness(1.35); }
.tl-seg.ok   { background: var(--ok);     }
.tl-seg.warn { background: var(--warn);   }
.tl-seg.crit { background: var(--danger); }

/* Cursor line */
.tl-cursor {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: rgba(255,255,255,.7); pointer-events: none;
  display: none; transform: translateX(-50%); border-radius: 1px;
}

/* Floating tooltip */
.tl-tooltip {
  position: fixed; z-index: 9999;
  background: var(--bg-raised); border: 1px solid var(--border-mid);
  border-radius: var(--radius-md); padding: 10px 14px;
  font-size: 11px; font-family: var(--font-sans);
  pointer-events: none; display: none; min-width: 190px;
  box-shadow: 0 6px 24px rgba(0,0,0,.45);
}
.tl-tt-time { font-size: 10px; color: var(--text-2); margin-bottom: 6px; font-weight: 600; }
.tl-tt-divider { border-top: 1px solid var(--border); margin-bottom: 6px; }
.tl-tt-row {
  display: grid; grid-template-columns: 1fr auto 16px;
  align-items: center; gap: 6px; padding: 2px 0;
}
.tl-tt-label { color: var(--text-2); }
.tl-tt-val   { color: var(--text-1); font-weight: 700; text-align: right; }
.tl-tt-icon  { font-size: 10px; text-align: center; }
.tl-tt-warn  { color: var(--warn); }
.tl-tt-crit  { color: var(--danger); }
.tl-tt-events {
  margin-top: 7px; padding-top: 6px; border-top: 1px solid var(--border);
  color: var(--accent); font-size: 10px; font-weight: 600;
}

.timeline-legend { display: flex; gap: 14px; margin-top: 6px; font-size: 10px; color: var(--text-2); }
.tl-ok   { color: var(--ok);     }
.tl-warn { color: var(--warn);   }
.tl-crit { color: var(--danger); }

/* Correlations */
.correlations-card {}
.corr-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 0; border-bottom: 1px solid var(--border);
  font-size: 11px;
}
.corr-row:last-child { border-bottom: none; }
.corr-bar-wrap { display: flex; align-items: center; gap: 8px; }
.corr-bar-bg { width: 60px; height: 4px; background: var(--bg-raised); border-radius: 2px; }
.corr-bar-fill { height: 100%; border-radius: 2px; transition: width .5s; }
.corr-val { font-weight: 700; min-width: 36px; text-align: right; }

/* Section Heading */
.section-heading {
  display: flex; align-items: center; gap: 8px;
  font-size: 10px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-3); margin: 28px 0 14px;
  padding-bottom: 9px; border-bottom: 1px solid var(--border);
}
.sh-icon { color: var(--accent); }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 8px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 14px 16px;
  transition: border-color var(--trans);
}
.stat-card:hover { border-color: var(--border-mid); }
.stat-label { font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--text-3); margin-bottom: 8px; }
.stat-peak { font-size: 24px; font-weight: 800; line-height: 1; margin-bottom: 8px; }
.stat-rows { display: flex; flex-wrap: wrap; gap: 6px 12px; }
.stat-row { font-size: 10px; color: var(--text-3); }
.stat-row span { color: var(--text-2); font-weight: 600; }
.val-ok     { color: var(--ok);     }
.val-warn   { color: var(--warn);   }
.val-danger { color: var(--danger); }
.val-accent { color: var(--accent); }
.val-purple { color: var(--purple); }

/* Alerts */
.alert-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 13px 16px; border-radius: var(--radius-md);
  margin-bottom: 8px; animation: fadeSlide .2s ease;
}
.alert-item.critical { background: #1a0d0d; border: 1px solid #3d1515; }
.alert-item.warning  { background: #1a1508; border: 1px solid #3d2e10; }
.alert-item.ok       { background: #0d1a12; border: 1px solid #153322; }
[data-theme="light"] .alert-item.critical { background: #fff0f0; border: 1px solid #f5c0c0; }
[data-theme="light"] .alert-item.warning  { background: #fffbf0; border: 1px solid #f5dca0; }
[data-theme="light"] .alert-item.ok       { background: #f0fff4; border: 1px solid #b0e8c8; }
.alert-icon { font-size: 13px; flex-shrink: 0; margin-top: 1px; }
.alert-icon.critical { color: var(--danger); }
.alert-icon.warning  { color: var(--warn);   }
.alert-icon.ok       { color: var(--ok);     }
.alert-title { font-size: 12px; font-weight: 700; display: block; margin-bottom: 3px; }
.alert-desc  { font-size: 11px; color: var(--text-2); line-height: 1.7; }

/* Recommendations */
.rec-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 13px 16px; border-radius: var(--radius-md);
  background: var(--bg-card); border: 1px solid var(--border);
  margin-bottom: 8px;
}
.rec-icon { font-size: 18px; flex-shrink: 0; }
.rec-title { font-size: 12px; font-weight: 700; display: block; margin-bottom: 3px; }
.rec-desc  { font-size: 11px; color: var(--text-2); line-height: 1.7; }

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CHARTS TAB ─────────────────────────────────────────────────── */
.charts-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  margin-bottom: 18px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.chart-groups { display: flex; gap: 4px; flex-wrap: wrap; }
.cg-btn {
  padding: 5px 14px; border-radius: 20px;
  background: var(--bg-raised); border: 1px solid var(--border);
  color: var(--text-2); font-family: var(--font-mono); font-size: 11px;
  cursor: pointer; transition: all var(--trans);
}
.cg-btn:hover { border-color: var(--border-mid); color: var(--text-1); }
.cg-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.charts-toolbar-right { display: flex; align-items: center; gap: 12px; }
.toggle-label { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-2); cursor: pointer; }
.toggle-label input { accent-color: var(--accent); }

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(460px, 1fr));
  gap: 16px;
}
.chart-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 18px;
}
.chart-card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}
.chart-card-title { font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.chart-card-actions { display: flex; gap: 6px; }
.chart-canvas-wrap { position: relative; height: 195px; }
.chart-thresholds { display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }
.threshold-item { display: flex; align-items: center; gap: 5px; font-size: 10px; color: var(--text-3); }
.threshold-dash { display: inline-block; width: 14px; border-top: 1.5px dashed; opacity: .8; }

/* ── EVENTS TAB ─────────────────────────────────────────────────── */
.events-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; margin-bottom: 18px;
  padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.events-filters { display: flex; gap: 4px; }
.ef-btn {
  padding: 5px 14px; border-radius: 20px;
  background: var(--bg-raised); border: 1px solid var(--border);
  color: var(--text-2); font-family: var(--font-mono); font-size: 11px;
  cursor: pointer; transition: all var(--trans);
}
.ef-btn:hover { border-color: var(--border-mid); color: var(--text-1); }
.ef-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.events-summary { font-size: 11px; color: var(--text-2); }

.tl-filter-banner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 14px; margin-bottom: 10px;
  background: rgba(79,142,247,.08); border: 1px solid rgba(79,142,247,.25);
  border-radius: var(--radius-sm); font-size: 11px; color: var(--accent);
}
.tl-filter-clear {
  background: none; border: 1px solid rgba(79,142,247,.35);
  color: var(--accent); border-radius: var(--radius-sm);
  padding: 2px 8px; font-size: 10px; cursor: pointer;
}
.tl-filter-clear:hover { background: rgba(79,142,247,.12); }

.events-table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--border); }
.events-table { width: 100%; border-collapse: collapse; }
.events-table th {
  padding: 10px 14px; text-align: left; font-size: 10px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--text-3);
  background: var(--bg-raised); border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.events-table td {
  padding: 9px 14px; font-size: 11px; color: var(--text-2);
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.events-table tr:last-child td { border-bottom: none; }
.events-table tr:hover td { background: var(--bg-hover); }
.sev-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 3px; font-size: 10px; font-weight: 700; letter-spacing: .05em;
}
.sev-badge.critical { background: rgba(247,79,79,.12);  color: var(--danger); }
.sev-badge.warning  { background: rgba(245,166,35,.12); color: var(--warn);   }
.sev-badge.throttle { background: rgba(160,126,245,.12);color: var(--purple); }
.events-empty { padding: 40px; text-align: center; color: var(--text-3); }

/* ── EXPORT TAB ─────────────────────────────────────────────────── */
.export-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.export-card { display: flex; flex-direction: column; gap: 10px; padding: 22px; }
.export-card-icon { font-size: 28px; }
.export-card h3 { font-size: 14px; font-weight: 700; }
.export-card p { font-size: 12px; color: var(--text-2); line-height: 1.8; flex: 1; }
.export-confirm { font-size: 11px; color: var(--ok); margin-top: 2px; display: block; }

/* ── BUTTONS ────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 9px 22px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; border: none;
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  letter-spacing: .04em; cursor: pointer;
  transition: opacity var(--trans), transform .1s;
}
.btn-primary:hover { opacity: .88; }
.btn-primary:active { transform: scale(.97); }

.btn-ghost {
  padding: 6px 12px; border-radius: var(--radius-sm);
  background: transparent; border: 1px solid var(--border-mid);
  color: var(--text-2); font-family: var(--font-mono); font-size: 11px;
  cursor: pointer; transition: all var(--trans);
}
.btn-ghost:hover { border-color: var(--border-hi); color: var(--text-1); }

.btn-icon {
  width: 30px; height: 30px; border-radius: var(--radius-sm);
  background: none; border: 1px solid var(--border);
  color: var(--text-2); cursor: pointer; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans);
}
.btn-icon:hover { border-color: var(--border-mid); color: var(--text-1); }

.btn-chart-dl {
  padding: 3px 9px; border-radius: var(--radius-sm);
  background: none; border: 1px solid var(--border);
  color: var(--text-3); font-family: var(--font-mono); font-size: 10px;
  cursor: pointer; transition: all var(--trans);
}
.btn-chart-dl:hover { border-color: var(--accent); color: var(--accent); }

/* ── PRINT STYLES ───────────────────────────────────────────────── */
@media print {
  #screen-upload, #screen-loading, .app-header, .tab-nav,
  .charts-toolbar, .events-toolbar, .export-grid,
  #tab-charts, #tab-events, #tab-export { display: none !important; }
  #screen-app { display: block !important; }
  #tab-overview { display: block !important; max-width: 100%; padding: 0; }
  .overview-top { grid-template-columns: 180px 1fr; }
  body { background: #fff; color: #000; font-size: 11px; }
  .card { border: 1px solid #ccc; break-inside: avoid; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── RESPONSIVE ─────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .overview-top { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .app-header-left .header-filename { display: none; }
  .upload-header-links a:not(:last-child) { display: none; }
  .tab-btn { padding: 0 10px; font-size: 11px; }
  .export-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .upload-main { padding: 32px 16px 40px; }
  .drop-inner { padding: 36px 16px 30px; }
  .upload-guide { flex-direction: column; align-items: flex-start; }
  .guide-arrow { display: none; }
}