/* ============================================================
   SMD Resistor Code Calculator — CSS v1.0.0
   F.Robin Technologies | scoped to .smd-wrap
   ============================================================ */
.smd-wrap {
  --cyan:    #00BFFF;
  --cyan-d:  #0099CC;
  --dark:    #0d0d0d;
  --white:   #ffffff;
  --off:     #f5f7fa;
  --border:  #e5e7eb;
  --grey:    #6b7280;
  --text:    #1a1a1a;
  --radius:  10px;
  --font:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,.09);
  max-width: 640px;
  margin: 2em auto;
  overflow: hidden;
}

/* Utility */
.smd-hide { display: none !important; }

/* ── Header ─────────────────────────────────────────────── */
.smd-header {
  background: linear-gradient(135deg, #0d0d0d 0%, #0a1628 100%);
  color: var(--white); padding: 26px 26px 22px; text-align: center;
}
.smd-icon { margin-bottom: 10px; }
.smd-icon svg { display: inline-block; }
.smd-title {
  margin: 0 0 5px; font-size: 1.3rem; font-weight: 800;
  color: var(--white); border: none; padding: 0; line-height: 1.2;
}
.smd-subtitle { margin: 0; font-size: .83rem; color: rgba(255,255,255,.60); line-height: 1.5; }

/* ── Body ───────────────────────────────────────────────── */
.smd-body { padding: 22px 22px 24px; }

/* ── Tabs ───────────────────────────────────────────────── */
.smd-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.smd-tab {
  flex: 1; padding: 9px 0; border: 1.5px solid var(--border);
  border-radius: 8px; background: var(--off); color: var(--grey);
  font-size: .88rem; font-weight: 700; cursor: pointer;
  font-family: var(--font); transition: all .18s;
}
.smd-tab:hover { border-color: var(--cyan); color: var(--cyan); }
.smd-tab-active { background: var(--dark); color: var(--cyan); border-color: var(--cyan); }

/* ── Mode description ───────────────────────────────────── */
.smd-mode-desc {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--off); border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  border-radius: 8px; padding: 10px 14px; margin-bottom: 16px;
  font-size: .84rem; color: var(--grey); line-height: 1.5;
}
.smd-mode-tag {
  background: var(--dark); color: var(--cyan);
  font-size: .72rem; font-weight: 800; letter-spacing: .08em;
  text-transform: uppercase; padding: 3px 10px; border-radius: 100px;
  white-space: nowrap; flex-shrink: 0;
}
.smd-mode-info strong { color: var(--text); }

/* ── Input ──────────────────────────────────────────────── */
.smd-input-section { margin-bottom: 14px; }
.smd-input-label {
  display: block; font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .07em;
  color: var(--grey); margin-bottom: 6px;
}
.smd-input-row {
  display: flex; gap: 10px; align-items: stretch;
}
.smd-input {
  flex: 1; border: 1.5px solid var(--border); border-radius: 8px;
  background: var(--off); font-size: 1.4rem; font-weight: 800;
  font-family: "Courier New", monospace; color: var(--text);
  padding: 12px 16px; outline: none; text-transform: uppercase;
  letter-spacing: .12em; transition: border-color .18s, box-shadow .18s;
  min-width: 0;
}
.smd-input:focus {
  border-color: var(--cyan); background: var(--white);
  box-shadow: 0 0 0 3px rgba(0,191,255,.14);
}
.smd-input::placeholder { color: #c4c9d1; font-weight: 400; letter-spacing: .04em; font-size: 1rem; }
.smd-calc-btn {
  padding: 12px 24px; background: var(--cyan); color: #000;
  border: none; border-radius: 8px; font-size: .95rem; font-weight: 800;
  cursor: pointer; font-family: var(--font); white-space: nowrap;
  transition: background .18s, transform .18s;
  box-shadow: 0 2px 8px rgba(0,191,255,.28);
}
.smd-calc-btn:hover { background: var(--cyan-d); }
.smd-calc-btn:active { transform: scale(.97); }

/* EIA-96 letter select */
.smd-eia96-row { margin-top: 10px; }
.smd-select {
  width: 100%; border: 1.5px solid var(--border); border-radius: 8px;
  background: var(--off); font-size: .9rem; font-family: var(--font);
  color: var(--text); padding: 10px 12px; outline: none; cursor: pointer;
  transition: border-color .18s;
}
.smd-select:focus { border-color: var(--cyan); }

/* ── Error message ──────────────────────────────────────── */
.smd-msg {
  background: #fce8e6; color: #c0392b; border: 1px solid #f5c6c2;
  border-radius: 7px; padding: 10px 14px; font-size: .86rem;
  font-weight: 600; margin-bottom: 14px;
}

/* ── Result panel ───────────────────────────────────────── */
.smd-result {
  background: var(--dark); border-radius: var(--radius);
  padding: 20px 20px 18px; margin-bottom: 14px;
  animation: smdFade .22s ease;
}
@keyframes smdFade {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}
.smd-result-main {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; margin-bottom: 16px; padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-wrap: wrap;
}
.smd-result-code-box,
.smd-result-value-box { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.smd-code-display {
  font-size: 1.8rem; font-weight: 900; color: rgba(255,255,255,.75);
  font-family: "Courier New", monospace; letter-spacing: .15em;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  padding: 8px 20px; border-radius: 8px;
}
.smd-value-display {
  font-size: 2rem; font-weight: 900; color: var(--cyan);
  font-family: "Courier New", monospace;
}
.smd-code-label, .smd-value-label {
  font-size: .68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: rgba(255,255,255,.38);
}
.smd-result-arrow {
  font-size: 1.5rem; color: rgba(255,255,255,.25); flex-shrink: 0;
}
.smd-result-meta {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 10px;
}
.smd-meta-item { display: flex; flex-direction: column; gap: 3px; }
.smd-meta-lbl {
  font-size: .65rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .07em; color: rgba(255,255,255,.38);
}
.smd-meta-val { font-size: .88rem; font-weight: 700; color: var(--white); }

/* ── Examples ───────────────────────────────────────────── */
.smd-examples {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 12px;
}
.smd-examples-label { font-size: .75rem; font-weight: 700; color: var(--grey); white-space: nowrap; }
.smd-example-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.smd-chip {
  background: var(--off); border: 1.5px solid var(--border);
  color: var(--text); font-size: .82rem; font-weight: 700;
  font-family: "Courier New", monospace; padding: 5px 14px;
  border-radius: 100px; cursor: pointer; transition: all .18s;
}
.smd-chip:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,191,255,.06); }

/* ── Reset ──────────────────────────────────────────────── */
.smd-reset-btn {
  width: 100%; padding: 9px; border: 1.5px solid var(--border);
  border-radius: 7px; background: var(--off); color: var(--grey);
  font-size: .86rem; font-weight: 700; cursor: pointer;
  font-family: var(--font); transition: all .18s;
}
.smd-reset-btn:hover { background: #e5e7eb; color: var(--text); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 480px) {
  .smd-result-meta { grid-template-columns: 1fr 1fr; }
  .smd-body { padding: 14px 12px 16px; }
  .smd-input { font-size: 1.1rem; }
}