.scientific-keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:20px 0;max-width:650px}.scientific-keys button{min-height:48px;padding:8px;background:var(--paper-soft);color:var(--blue-deep);border:1px solid var(--line-strong);border-radius:7px;cursor:pointer}.scientific-keys button:hover{background:var(--blue-soft)}.calc-controls{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.calc-controls button{min-height:44px}.calc-controls button:not(.primary){padding:10px 16px;border:1px solid var(--line-strong);border-radius:7px;background:var(--paper-soft);color:var(--blue-deep)}.shift-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;border:1px solid var(--line);border-radius:8px;padding:16px;margin:14px 0}.shift-row legend{font-weight:700;color:var(--blue-deep)}.shift-row label{min-width:0}.shift-row input{min-width:0;width:100%;box-sizing:border-box}.shift-row .overnight{display:flex;align-items:center;gap:8px}.shift-row .overnight input{width:20px;flex:none}.fraction-grid{display:grid;grid-template-columns:minmax(0,1fr) 100px minmax(0,1fr);gap:20px;align-items:center}.fraction-grid fieldset{min-width:0;border:1px solid var(--line);padding:16px;border-radius:8px}.fraction-grid input{min-width:0;box-sizing:border-box;width:100%}.fraction-grid label{display:block;margin:8px 0}.calculator-note{background:var(--blue-soft);padding:16px;border-left:3px solid var(--blue);line-height:1.6}#result{overflow-wrap:anywhere}@media(max-width:600px){.shift-row{grid-template-columns:repeat(2,minmax(0,1fr));padding:10px}.fraction-grid{grid-template-columns:1fr;gap:12px}.scientific-keys{gap:5px}.scientific-keys button{padding:6px;font-size:14px}}