/* SMTCalc shared stylesheet. ASCII-clean, no characters above codepoint 127. */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Manrope:wght@600;700;800&family=Share+Tech+Mono&display=swap');

/* DESIGN TOKENS */
:root {
  --bg:           #130d08;
  --bg2:          #19120d;
  --bg3:          #201812;
  --bg4:          #261e18;
  --bg5:          #2e2620;
  --accent:       #ff9238;
  --accent-hover: #ef8529;
  --accent2:      #ff752b;
  --text:         #fdeee5;
  --muted:        #c4b3a6;
  --border:       rgba(253,238,229,0.12);
  --border2:      rgba(253,238,229,0.22);
  --green:        #1fa855;
  --yellow:       #ff752b;
  --red:          #cf4444;
  --mono:         'Share Tech Mono', monospace;
}

/* RESET + BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* HEADER */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 3rem;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(26,22,20,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.logo {
  font-weight: 900;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text);
}
.logo span { color: var(--accent); }

nav { display: flex; gap: 2.5rem; align-items: center; }
nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: color 0.2s;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
nav a:hover { color: var(--accent); }

.tool-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
}

/* TOOL HERO */
.tool-hero {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 120px 2rem 60px;
}
.tool-hero-inner {
  max-width: 960px;
  margin: 0 auto;
}
.hero-eyebrow {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.tool-hero h1 {
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text);
}
.tool-hero p {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 700px;
  line-height: 1.7;
}

/* GUIDE BANNER */
.guide-banner {
  background: rgba(255,146,56,0.07);
  border-bottom: 1px solid rgba(255,146,56,0.2);
  padding: 0.75rem 2rem;
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.guide-banner a { color: var(--accent); text-decoration: none; font-weight: 500; }
.guide-banner a:hover { text-decoration: underline; }

/* MAIN TOOL GRID */
.tool-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* PANELS */
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
}
.panel-full { grid-column: 1 / -1; }
.panel-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

/* FIELDS */
.field { margin-bottom: 1.25rem; }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}
.input-wrap {
  display: flex;
  align-items: stretch;
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.input-wrap:focus-within { border-color: var(--accent); }
.input-wrap input,
.input-wrap select {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 0.65rem 0.75rem;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--text);
  min-width: 0;
}
.input-wrap select { font-family: 'Inter', sans-serif; cursor: pointer; }
.input-unit {
  padding: 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  border-left: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg4);
  display: flex;
  align-items: center;
}
.field-note {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.4rem;
  line-height: 1.5;
}

/* STAT BOXES */
.stat-box {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.stat-box .stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.stat-box .stat-value {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
}
.stat-box .stat-unit {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

/* VERDICT COLORS */
.pass { color: var(--green) !important; }
.warn { color: var(--yellow) !important; }
.fail { color: var(--red) !important; }

/* RESULT/ALERT BOXES */
.warn-box {
  background: rgba(235,107,52,0.1);
  border: 1px solid rgba(235,107,52,0.35);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.65;
}
.info-box {
  background: rgba(31,168,85,0.1);
  border: 1px solid rgba(31,168,85,0.3);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.65;
}
.results-empty {
  color: var(--muted);
  font-size: 0.95rem;
  font-style: italic;
}

/* PRINT BAR */
.print-bar {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  max-width: 960px;
  margin: 0 auto;
}
.print-bar label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}
.print-bar input[type="text"] {
  flex: 1;
  min-width: 200px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.6rem 0.75rem;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  outline: none;
}
.print-bar input[type="text"]:focus { border-color: var(--accent); }
.print-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.65rem 1.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.print-btn:hover { background: var(--accent-hover); }

/* ACCORDION */
.accordion { border-top: 1px solid var(--border); margin-top: 0.5rem; }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-header {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1.1rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  transition: color 0.2s;
  gap: 1rem;
}
.accordion-header:hover { color: var(--accent); }
.accordion-chevron { flex-shrink: 0; transition: transform 0.25s; color: var(--muted); }
.accordion-item.open .accordion-chevron { transform: rotate(180deg); }
.accordion-content {
  display: none;
  padding: 0 0 1.75rem;
  color: var(--muted);
  font-size: 0.97rem;
  line-height: 1.75;
}
.accordion-content.open { display: block; }
.accordion-content h3 {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  margin: 1.25rem 0 0.5rem;
  letter-spacing: 0.01em;
}
.accordion-content p { margin-bottom: 0.75rem; }
.accordion-content ul,
.accordion-content ol { margin: 0.5rem 0 0.75rem 1.5rem; }
.accordion-content li { margin-bottom: 0.35rem; }

/* FOOTER */
footer {
  padding: 2.5rem 2rem;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-copy {
  font-size: 1rem;
  color: var(--muted);
}
.footer-copy a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.footer-copy a:hover { color: var(--accent-hover); }
.footer-sep { padding: 0 0.6rem; color: var(--border2); }

/* RESPONSIVE */
@media (max-width: 768px) {
  header { padding: 0 1.5rem; height: 64px; }
  .logo { font-size: 1.5rem; }
  nav { gap: 1rem; }
  .tool-hero { padding: 100px 1.5rem 40px; }
  .tool-main { grid-template-columns: 1fr; padding: 2rem 1.5rem 4rem; }
  .panel-full { grid-column: 1; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  header { padding: 0 1rem; }
  .tool-hero { padding: 88px 1rem 32px; }
  .tool-main { padding: 1.5rem 1rem 3rem; gap: 1rem; }
  .print-bar { padding: 1rem; }
  footer { padding: 2.5rem 1rem; }
}

/* PRINT BASE (each page adds its own :root override and element-specific rules) */
@media print {
  header, .guide-banner, .print-bar, nav { display: none !important; }
  body { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}