.tool-hero { background: linear-gradient(135deg, #064e3b 0%, #059669 50%, #22c55e 100%); }
.form-card { background: white; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow-sm); }
.form-card-header { display: flex; align-items: center; gap: 10px; margin-bottom: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-light); }
.form-card-icon { font-size: 1.4rem; }
.form-card-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.field-group { margin-bottom: 1rem; }
.field-label { display: block; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 6px; }
.field-input { width: 100%; padding: 0.7rem 0.875rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 0.95rem; font-family: 'Inter',sans-serif; outline: none; background: var(--bg); color: var(--text); transition: var(--transition); }
.field-input:focus { border-color: var(--primary); background: white; }
.btn-calc { width: 100%; padding: 0.875rem; background: linear-gradient(135deg, #059669, #22c55e); color: white; border: none; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 700; cursor: pointer; font-family: 'Inter',sans-serif; transition: var(--transition); margin-top: 0.5rem; }
.btn-calc:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(5,150,105,0.4); }
.btn-reset-small { width: 100%; padding: 0.6rem; background: none; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600; cursor: pointer; font-family: 'Inter',sans-serif; color: var(--text-muted); margin-top: 0.5rem; transition: var(--transition); }
.btn-reset-small:hover { border-color: var(--danger); color: var(--danger); }
.placeholder-card { background: white; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 3rem 2rem; text-align: center; box-shadow: var(--shadow-sm); }
.placeholder-icon { font-size: 3rem; margin-bottom: 0.75rem; opacity: 0.3; }
.placeholder-text { font-size: 0.9rem; color: var(--text-muted); }
.result-panel { background: white; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow-sm); }
.result-panel-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-light); }
.result-panel-title { font-size: 1rem; font-weight: 700; }
.result-panel-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.healthy-range-row { background: rgba(5,150,105,0.06); border-radius: 8px; padding: 0.75rem 1rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; margin-top: 1rem; }
.healthy-range-label { color: var(--text-muted); font-weight: 500; }
.healthy-range-val { font-weight: 700; color: #059669; }