/* ===========================
   OMNIVIZ — APP PAGE CSS
   =========================== */

:root {
  --clr-bg: #F8F7F4;
  --clr-surface: #EDECEA;
  --clr-border: #DDD9D2;
  --clr-text: #1A1816;
  --clr-muted: #6B6760;
  --clr-accent: #0D7C66;
  --clr-accent-hover: #0A6B58;
  --clr-accent-light: #EDFAF3;
  --clr-accent-mid: #C6F0DA;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,.05), 0 4px 12px rgba(0,0,0,.05);
  --shadow-lg: 0 4px 20px rgba(0,0,0,.09);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); background: var(--clr-bg); color: var(--clr-text); font-size: 15px; line-height: 1.6; -webkit-font-smoothing: antialiased; }

/* ---- NAVBAR ---- */
.navbar { position: sticky; top: 0; z-index: 100; background: rgba(248,247,244,.93); backdrop-filter: blur(12px); border-bottom: 1px solid var(--clr-border); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; height: 58px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-family: var(--font-display); font-size: 1.2rem; color: var(--clr-text); text-decoration: none; }
.logo-viz { color: var(--clr-accent); }
.nav-links a {
  color: var(--clr-muted); text-decoration: none;
  font-size: .85rem; font-weight: 500;
  padding: 5px 12px; border-radius: 100px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--clr-accent); background: var(--clr-accent-light); }

/* ---- MAIN ---- */
.app-main { max-width: 1100px; margin: 0 auto; padding: 28px 24px 56px; display: flex; flex-direction: column; gap: 22px; }

/* ---- INSTRUCTIONS ---- */
.instructions-panel { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.inst-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 22px; border-bottom: 1px solid var(--clr-border); }
.inst-header h2 { font-family: var(--font-display); font-size: 1rem; color: var(--clr-text); }
.inst-toggle { background: none; border: none; cursor: pointer; font-size: .76rem; font-weight: 600; color: var(--clr-accent); font-family: var(--font-body); transition: opacity .2s; }
.inst-toggle:hover { opacity: .7; }
.inst-body { padding: 18px 22px; }
.inst-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.inst-block { display: flex; gap: 10px; font-size: .82rem; }
.inst-num { font-family: var(--font-display); font-size: 1.4rem; color: var(--clr-accent); opacity: 1; line-height: 1; flex-shrink: 0; width: 24px; }
.inst-block strong { display: block; font-weight: 600; margin-bottom: 2px; font-size: .82rem; }
.inst-block p { color: var(--clr-muted); line-height: 1.5; font-size: .8rem; }
code { background: var(--clr-bg); padding: 1px 5px; border-radius: 4px; font-size: .82em; font-family: 'SF Mono', 'Fira Code', monospace; }
.inst-note { background: var(--clr-accent-light); border: 1px solid var(--clr-accent-mid); border-radius: 8px; padding: 9px 13px; font-size: .78rem; color: var(--clr-accent-hover); }

/* ---- UPLOAD ---- */
.upload-section { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.upload-zone {
  width: 100%; border: 2px dashed var(--clr-border); border-radius: var(--radius-lg);
  background: var(--clr-surface); padding: 40px 32px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 7px; cursor: pointer; text-align: center; transition: border-color .2s, background .2s;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--clr-accent); background: var(--clr-accent-light); }
.upload-icon { font-size: 1.8rem; color: var(--clr-accent); opacity: .6; margin-bottom: 2px; }
.upload-text strong { display: block; font-size: .92rem; font-weight: 600; color: var(--clr-text); margin-bottom: 3px; }
.upload-text span { font-size: .8rem; color: var(--clr-muted); }
.upload-formats { font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--clr-accent); margin-top: 5px; }
.upload-or { display: flex; align-items: center; gap: 10px; width: 100%; max-width: 320px; color: var(--clr-muted); font-size: .78rem; }
.upload-or::before, .upload-or::after { content: ''; flex: 1; height: 1px; background: var(--clr-border); }
.btn-sample {
  display: flex; align-items: center; gap: 7px; background: var(--clr-surface);
  border: 1.5px solid var(--clr-accent); border-radius: 9px; padding: 9px 18px;
  font-family: var(--font-body); font-size: .86rem; font-weight: 500; color: var(--clr-accent); cursor: pointer;
  transition: background .2s, box-shadow .2s;
}
.btn-sample:hover { background: var(--clr-accent-light); box-shadow: 0 0 0 3px rgba(26,122,74,.1); }

/* ---- DATA SUMMARY ---- */
.data-summary { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.summary-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding: 14px 20px; border-bottom: 1px solid var(--clr-border); }
.summary-header h3 { font-family: var(--font-display); font-size: 1rem; }
.summary-stats { display: flex; gap: 8px; flex-wrap: wrap; }
.stat-pill {
  display: flex; align-items: center; gap: 7px;
  background: var(--clr-accent-light); border: 1px solid var(--clr-accent-mid);
  border-radius: 7px; padding: 4px 11px;
}
.stat-label { font-size: .7rem; font-weight: 700; color: var(--clr-accent); text-transform: uppercase; letter-spacing: .05em; }
.stat-val { font-size: .88rem; font-weight: 700; color: var(--clr-accent-hover); }
.table-wrapper { overflow-x: auto; max-width: 100%; }
.data-table { width: 100%; border-collapse: collapse; font-size: .8rem; }
.data-table thead tr th {
  background: var(--clr-accent);
  padding: 8px 13px; text-align: left;
  font-weight: 700; font-size: .72rem;
  text-transform: uppercase; letter-spacing: .05em;
  color: #fff; border-bottom: 1px solid rgba(255,255,255,.2);
  white-space: nowrap;
}
.data-table td { padding: 7px 13px; border-bottom: 1px solid var(--clr-border); color: var(--clr-text); white-space: nowrap; }
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover td { background: var(--clr-accent-light); }
.data-table td.ellipsis { color: var(--clr-muted); text-align: center; font-size: 1rem; letter-spacing: .08em; }
.col-note { padding: 8px 20px; font-size: .76rem; color: var(--clr-accent-hover); background: var(--clr-accent-light); border-top: 1px solid var(--clr-accent-mid); }

/* ---- CHART CONFIG ---- */
.chart-config { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow); }
.config-title { font-family: var(--font-display); font-size: 1rem; margin-bottom: 18px; }
.config-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 18px; }
.config-group { display: flex; flex-direction: column; gap: 5px; }
.config-label { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--clr-muted); }
.config-select, .config-input {
  width: 100%; border: 1.5px solid var(--clr-border); border-radius: 8px; padding: 8px 11px;
  font-family: var(--font-body); font-size: .86rem; color: var(--clr-text); background: var(--clr-bg);
  outline: none; transition: border-color .2s, box-shadow .2s; appearance: none; -webkit-appearance: none;
}
.config-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B6760' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px;
}
.config-select:focus, .config-input:focus { border-color: var(--clr-accent); box-shadow: 0 0 0 3px rgba(26,122,74,.1); }

/* Color palette row */
.color-palette-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 4px; }
.color-swatch {
  width: 24px; height: 24px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; transition: transform .15s, border-color .15s;
}
.color-swatch:hover { transform: scale(1.2); }
.color-swatch.active { border-color: var(--clr-text); }
.color-input-wrap { display: flex; align-items: center; gap: 5px; font-size: .75rem; color: var(--clr-muted); }
input[type="color"] { width: 24px; height: 24px; border: none; border-radius: 50%; cursor: pointer; padding: 0; background: none; }

.config-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.btn-primary { background: var(--clr-accent); color: #fff; padding: 9px 24px; border-radius: 8px; font-family: var(--font-body); font-size: .88rem; font-weight: 600; border: none; cursor: pointer; transition: background .2s, transform .15s; text-decoration: none; display: inline-block; }
.btn-primary:hover { background: var(--clr-accent-hover); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--clr-accent); padding: 9px 18px; border-radius: 8px; font-family: var(--font-body); font-size: .86rem; font-weight: 500; border: 1.5px solid var(--clr-accent); cursor: pointer; transition: background .2s; }
.btn-ghost:hover { background: var(--clr-accent-light); }

/* ---- CHART LABEL INPUTS ---- */
.chart-label-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.chart-label-group { display: flex; flex-direction: column; gap: 5px; }

/* ---- CHART OUTPUT ---- */
.chart-output { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); animation: fadeUp .4s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.chart-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--clr-border); }
.chart-header h3 { font-family: var(--font-display); font-size: 1rem; }
.chart-download { display: flex; gap: 7px; }
.btn-download { background: var(--clr-bg); border: 1.5px solid var(--clr-accent); border-radius: 7px; padding: 5px 13px; font-family: var(--font-body); font-size: .78rem; font-weight: 600; color: var(--clr-accent); cursor: pointer; transition: background .2s; }
.btn-download:hover { background: var(--clr-accent-light); }
.chart-canvas-wrap { padding: 24px; min-height: 380px; display: flex; align-items: center; justify-content: center; }
.chart-canvas-wrap canvas { max-height: 450px !important; }

/* ---- FOOTER ---- */
.footer { background: var(--clr-bg); border-top: 1px solid var(--clr-border); padding: 20px 0; margin-top: 16px; }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; position: relative; }
.footer-brand { font-family: var(--font-display); font-size: .92rem; color: var(--clr-text); text-decoration: none; }
.footer-brand .logo-viz { color: var(--clr-accent); }
.footer-copy { position: absolute; left: 50%; transform: translateX(-50%); font-size: .78rem; color: var(--clr-muted); white-space: nowrap; }
.footer-copy a { color: var(--clr-accent); font-weight: 600; text-decoration: none; transition: color .2s; }
.footer-copy a:hover { color: var(--clr-accent-hover); }

/* ---- UTILITIES ---- */
.hidden { display: none !important; }

/* ---- RESPONSIVE ---- */

@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-mobile { display: none; flex-direction: column; background: var(--clr-bg); border-top: 1px solid var(--clr-border); padding: 12px 24px; gap: 2px; }
  .nav-mobile.open { display: flex; }
  .nav-mobile a { color: var(--clr-text); text-decoration: none; font-size: .9rem; font-weight: 500; padding: 9px 0; border-bottom: 1px solid var(--clr-border); }
  .nav-mobile a:last-child { border-bottom: none; }
}

@media (max-width: 800px) { .config-grid { grid-template-columns: 1fr 1fr; } .inst-grid { grid-template-columns: 1fr; } .chart-label-row { grid-template-columns: 1fr; } }
@media (max-width: 540px) {
  .config-grid { grid-template-columns: 1fr; }
  .summary-header { flex-direction: column; align-items: flex-start; }
  .chart-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .config-actions { flex-direction: column; }
  .btn-primary, .btn-ghost { width: 100%; text-align: center; }
  .footer-copy { position: static; transform: none; }
  .footer-inner { flex-direction: column; gap: 6px; text-align: center; }
}