html, body { height: 100%; overflow: hidden; }
body { display: flex; flex-direction: column; }

/* ── Sub-header ── */
.greda4-page-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.55rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--navy-800);
  flex-shrink: 0;
}
.greda4-ph-left  { display: flex; align-items: center; gap: 0.75rem; }
.greda4-ph-right { display: flex; align-items: center; gap: 0.75rem; }
.greda4-ph-center {
  flex: 1; display: flex; align-items: center; gap: 0.5rem;
  padding: 0 2rem; min-width: 0;
}
.greda4-ph-center label {
  font-size: 0.78rem; color: var(--text-dim); font-family: var(--font-mono);
  white-space: nowrap; flex-shrink: 0;
}
.greda4-ph-center input {
  flex: 1; min-width: 0;
  background: transparent; border: none; border-bottom: 1px solid var(--border);
  color: var(--text); font-size: 0.85rem; font-family: var(--font-mono);
  padding: 0.1rem 0.25rem; outline: none; transition: border-color 0.15s;
}
.greda4-ph-center input:focus { border-bottom-color: var(--accent); }

@media (max-width: 900px) {
  html, body { height: auto; overflow-x: hidden; overflow-y: auto; }
  body { display: block; }
  .greda4-title-text { display: none; }
  .result-strip { display: flex !important; }
}
@media (max-width: 768px) {
  .greda4-page-header {
    display: grid;
    grid-template-areas: "left right" "center center";
    grid-template-columns: auto 1fr;
    align-items: center;
    padding: 0.4rem 0.75rem;
    gap: 0.3rem 0.5rem;
  }
  .greda4-ph-left   { grid-area: left; gap: 0.5rem; }
  .greda4-ph-right  { grid-area: right; justify-self: end; gap: 0.25rem !important; }
  .greda4-ph-center { grid-area: center; flex: unset; padding: 0.2rem 0 0; border-top: 1px solid var(--border); }
}

/* ── 2-col layout ── */
@media (min-width: 901px) {
  .module-layout-2col { grid-template-columns: 390px 1fr; }
}

/* ── Drawings row: 3 paneli ── */
.drawings-row { grid-template-columns: 1fr 1fr 1fr; flex: 0 0 auto; }

/* ── Result strip: 6 ćelija ── */
.result-strip {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 0; border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}

/* ── Tab content ── */
.tab-content { flex: 1; min-height: 0; overflow-y: auto; scrollbar-width: none; }
.tab-content::-webkit-scrollbar { display: none; }
.tab-content.active { flex-shrink: 1; flex-direction: column; }

.check-ok  { color: #43a047; font-weight: 600; }
.check-err { color: #e53935; font-weight: 600; }

/* ── Method toggle ── */
.method-toggle { display: flex; gap: 2px; }
.method-btn {
  padding: 0.22rem 0.55rem; font-size: 0.78rem; cursor: pointer;
  background: var(--navy-900); border: 1px solid var(--border);
  color: var(--text-dim); border-radius: var(--radius-sm); font-family: var(--font-mono);
  transition: background 0.15s, color 0.15s;
}
.method-btn.active { background: var(--blueprint); color: #fff; border-color: var(--blueprint); }

/* ── Select styling ── */
.form-row-2col select {
  width: 100%; box-sizing: border-box; padding: 0.4rem 0.45rem;
  background: var(--navy-900); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: var(--font-mono); font-size: 0.88rem; cursor: pointer;
}
.form-row-2col select:focus { outline: none; border-color: var(--blueprint); }
.form-row select {
  width: 100%; box-sizing: border-box; padding: 0.4rem 0.45rem;
  background: var(--navy-900); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-family: var(--font-mono); font-size: 0.88rem; cursor: pointer;
}
.form-row select:focus { outline: none; border-color: var(--blueprint); }