/* ============================================================
   Percy Flores - Lab Report Style System
   Academic Professional Theme with Dark/Light Mode
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Merriweather:wght@400;700&display=swap');

/* ── Variables - Dark (default) ── */
:root {
  --bg:          #07111f;
  --bg-card:     #0d1b2e;
  --bg-code:     #060e1a;
  --border:      rgba(59,130,246,0.18);
  --accent:      #3b82f6;
  --accent2:     #06b6d4;
  --purple:      #8b5cf6;
  --green:       #10b981;
  --red:         #ef4444;
  --yellow:      #f59e0b;
  --text:        #e8f0fe;
  --text-sub:    #94a3b8;
  --text-muted:  #4a6080;
  --heading:     #f0f6ff;
  --mono:        'JetBrains Mono', monospace;
  --serif:       'Merriweather', Georgia, serif;
  --sans:        'Inter', sans-serif;
  --pdf-bg:      #07111f;
}

/* ── Light Mode ── */
[data-theme="light"], .light {
  --bg:          #f6f9ff;
  --bg-card:     #ffffff;
  --bg-code:     #f1f5f9;
  --border:      rgba(37,99,235,0.14);
  --accent:      #1d4ed8;
  --accent2:     #0891b2;
  --purple:      #7c3aed;
  --green:       #059669;
  --red:         #dc2626;
  --yellow:      #d97706;
  --text:        #1e293b;
  --text-sub:    #475569;
  --text-muted:  #94a3b8;
  --heading:     #0f172a;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* ── Layout ── */
.report-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 28px 80px;
}

/* ── Top Bar ── */
.report-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
}
.topbar-logo {
  font-family: var(--mono); font-size: 0.85rem; font-weight: 700;
  color: var(--accent); text-decoration: none;
}
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.btn-back {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 8px;
  border: 1px solid var(--border); background: transparent;
  font-size: 0.8rem; font-weight: 500; color: var(--text-sub);
  text-decoration: none; cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.btn-back:hover { border-color: var(--accent); color: var(--text); }
.btn-print {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 8px;
  border: none;
  background: var(--accent); color: #fff;
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}
.btn-print:hover { opacity: 0.88; transform: translateY(-1px); }
.theme-btn {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border); background: transparent;
  cursor: pointer; font-size: 1rem; display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s;
}
.theme-btn:hover { border-color: var(--accent); }

/* ── Report Header ── */
.report-header {
  padding: 60px 0 40px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 48px;
}
.report-meta-top {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px; flex-wrap: wrap;
}
.badge-course {
  padding: 4px 12px; border-radius: 100px;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 600;
  border: 1px solid rgba(59,130,246,0.4);
  background: rgba(59,130,246,0.1); color: var(--accent);
  letter-spacing: 0.05em;
}
.badge-type {
  padding: 4px 12px; border-radius: 100px;
  font-family: var(--mono); font-size: 0.72rem; font-weight: 600;
  border: 1px solid rgba(6,182,212,0.35);
  background: rgba(6,182,212,0.08); color: var(--accent2);
}
.report-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700; line-height: 1.2;
  color: var(--heading); margin-bottom: 10px;
}
.report-subtitle {
  font-size: 1.05rem; color: var(--text-sub); margin-bottom: 28px;
}
.report-meta-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}
.meta-item { display: flex; flex-direction: column; gap: 2px; }
.meta-label {
  font-family: var(--mono); font-size: 0.68rem;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--text-muted);
}
.meta-value { font-size: 0.9rem; font-weight: 600; color: var(--text); }

/* ── Abstract Box ── */
.abstract {
  padding: 24px 28px;
  border-left: 4px solid var(--accent);
  background: var(--bg-card);
  border-radius: 0 12px 12px 0;
  margin-bottom: 48px;
}
.abstract-label {
  font-family: var(--mono); font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--accent); margin-bottom: 10px;
}
.abstract p { font-size: 0.95rem; color: var(--text-sub); line-height: 1.75; }

/* ── Section Headings ── */
.report-section { margin-bottom: 48px; }
.section-num {
  font-family: var(--mono); font-size: 0.72rem;
  color: var(--accent2); letter-spacing: 0.1em; display: block; margin-bottom: 4px;
}
h2.section-heading {
  font-family: var(--serif);
  font-size: 1.4rem; font-weight: 700;
  color: var(--heading); margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
h3.subsection {
  font-size: 1.05rem; font-weight: 600;
  color: var(--heading); margin: 24px 0 10px;
}
p { margin-bottom: 14px; color: var(--text-sub); font-size: 0.95rem; }
p strong { color: var(--text); }

/* ── Code Blocks ── */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 10px; overflow: hidden;
  margin: 20px 0;
}
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.code-lang {
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--accent); letter-spacing: 0.08em;
}
.code-dots { display: flex; gap: 5px; }
.code-dot { width: 10px; height: 10px; border-radius: 50%; }
.code-dot.r { background: #ff5f57; }
.code-dot.y { background: #febc2e; }
.code-dot.g { background: #28c840; }
pre {
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--mono); font-size: 0.82rem;
  line-height: 1.65; color: #c9d8f0;
  white-space: pre-wrap; word-break: break-all;
}
.hl-cmd    { color: #60a5fa; }
.hl-str    { color: #86efac; }
.hl-addr   { color: #f9a8d4; }
.hl-num    { color: #fde68a; }
.hl-kw     { color: #c084fc; }
.hl-cmt    { color: #475569; font-style: italic; }
.hl-prompt { color: #34d399; }

/* ── Info / Warning / Success boxes ── */
.callout {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px 20px; border-radius: 10px;
  margin: 20px 0; font-size: 0.88rem;
}
.callout-success { background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.25); }
.callout-warn    { background: rgba(245,158,11,0.08);  border: 1px solid rgba(245,158,11,0.25); }
.callout-danger  { background: rgba(239,68,68,0.08);   border: 1px solid rgba(239,68,68,0.25); }
.callout-info    { background: rgba(59,130,246,0.07);  border: 1px solid rgba(59,130,246,0.2); }
.callout-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.callout-body h4 { font-size: 0.82rem; font-weight: 700; margin-bottom: 4px; }
.callout-body p  { margin: 0; color: var(--text-sub); line-height: 1.6; }

/* ── Tables ── */
.report-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.85rem; margin: 20px 0;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border);
}
.report-table th {
  background: rgba(59,130,246,0.1);
  color: var(--accent); font-weight: 600;
  padding: 10px 16px; text-align: left;
  font-family: var(--mono); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
}
.report-table td {
  padding: 10px 16px; color: var(--text-sub);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.report-table tr:last-child td { border-bottom: none; }
.report-table tr:hover td { background: rgba(59,130,246,0.04); }

/* ── Step list ── */
.steps { counter-reset: step-counter; list-style: none; padding: 0; }
.steps li {
  counter-increment: step-counter;
  position: relative; padding: 14px 16px 14px 56px;
  margin-bottom: 10px;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg-card);
  font-size: 0.9rem; color: var(--text-sub);
  line-height: 1.65;
}
.steps li::before {
  content: counter(step-counter);
  position: absolute; left: 16px; top: 14px;
  width: 24px; height: 24px;
  background: var(--accent); color: #fff;
  border-radius: 50%; font-size: 0.72rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
}

/* ── Inline code ── */
code {
  font-family: var(--mono); font-size: 0.82em;
  background: rgba(59,130,246,0.1);
  padding: 2px 7px; border-radius: 5px;
  color: var(--accent2);
}

/* ── Tools grid ── */
.tools-grid {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;
}
.tool-tag {
  padding: 5px 14px; border-radius: 100px;
  border: 1px solid var(--border);
  background: rgba(59,130,246,0.06);
  font-family: var(--mono); font-size: 0.75rem; color: var(--text-sub);
}

/* ── Signature / footer ── */
.report-footer {
  margin-top: 60px; padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  font-size: 0.78rem; color: var(--text-muted); font-family: var(--mono);
}

/* ── Print Styles ── */
@media print {
  body { background: #fff !important; color: #1e293b !important; }
  .report-topbar { display: none !important; }
  .report-header { padding-top: 20px; }
  .code-block { break-inside: avoid; }
  .report-section { break-inside: avoid; }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .report-wrap { padding: 0 16px 60px; }
  .report-topbar { padding: 12px 16px; }
  .report-meta-grid { grid-template-columns: 1fr 1fr; }
  .report-title { font-size: 1.5rem; }
}